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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* This file contains classes used to manage the navigation structures within Moodle.
*
* @since Moodle 2.0
* @package core
* @copyright 2009 Sam Hemelryk
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
/**
* The name that will be used to separate the navigation cache within SESSION
*/
define('NAVIGATION_CACHE_NAME', 'navigation');
define('NAVIGATION_SITE_ADMIN_CACHE_NAME', 'navigationsiteadmin');
/**
* This class is used to represent a node in a navigation tree
*
* This class is used to represent a node in a navigation tree within Moodle,
* the tree could be one of global navigation, settings navigation, or the navbar.
* Each node can be one of two types either a Leaf (default) or a branch.
* When a node is first created it is created as a leaf, when/if children are added
* the node then becomes a branch.
*
* @package core
* @category navigation
* @copyright 2009 Sam Hemelryk
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class navigation_node implements renderable {
/** @var int Used to identify this node a leaf (default) 0 */
const NODETYPE_LEAF = 0;
/** @var int Used to identify this node a branch, happens with children 1 */
const NODETYPE_BRANCH = 1;
/** @var null Unknown node type null */
const TYPE_UNKNOWN = null;
/** @var int System node type 0 */
const TYPE_ROOTNODE = 0;
/** @var int System node type 1 */
const TYPE_SYSTEM = 1;
/** @var int Category node type 10 */
const TYPE_CATEGORY = 10;
/** var int Category displayed in MyHome navigation node */
const TYPE_MY_CATEGORY = 11;
/** @var int Course node type 20 */
const TYPE_COURSE = 20;
/** @var int Course Structure node type 30 */
const TYPE_SECTION = 30;
/** @var int Activity node type, e.g. Forum, Quiz 40 */
const TYPE_ACTIVITY = 40;
/** @var int Resource node type, e.g. Link to a file, or label 50 */
const TYPE_RESOURCE = 50;
/** @var int A custom node type, default when adding without specifing type 60 */
const TYPE_CUSTOM = 60;
/** @var int Setting node type, used only within settings nav 70 */
const TYPE_SETTING = 70;
/** @var int site admin branch node type, used only within settings nav 71 */
const TYPE_SITE_ADMIN = 71;
/** @var int Setting node type, used only within settings nav 80 */
const TYPE_USER = 80;
/** @var int Setting node type, used for containers of no importance 90 */
const TYPE_CONTAINER = 90;
/** var int Course the current user is not enrolled in */
const COURSE_OTHER = 0;
/** var int Course the current user is enrolled in but not viewing */
const COURSE_MY = 1;
/** var int Course the current user is currently viewing */
const COURSE_CURRENT = 2;
/** var string The course index page navigation node */
const COURSE_INDEX_PAGE = 'courseindexpage';
/** @var int Parameter to aid the coder in tracking [optional] */
public $id = null;
/** @var string|int The identifier for the node, used to retrieve the node */
public $key = null;
/** @var string The text to use for the node */
public $text = null;
/** @var string Short text to use if requested [optional] */
public $shorttext = null;
/** @var string The title attribute for an action if one is defined */
public $title = null;
/** @var string A string that can be used to build a help button */
public $helpbutton = null;
/** @var moodle_url|action_link|null An action for the node (link) */
public $action = null;
/** @var pix_icon The path to an icon to use for this node */
public $icon = null;
/** @var int See TYPE_* constants defined for this class */
public $type = self::TYPE_UNKNOWN;
/** @var int See NODETYPE_* constants defined for this class */
public $nodetype = self::NODETYPE_LEAF;
/** @var bool If set to true the node will be collapsed by default */
public $collapse = false;
/** @var bool If set to true the node will be expanded by default */
public $forceopen = false;
/** @var array An array of CSS classes for the node */
public $classes = array();
/** @var navigation_node_collection An array of child nodes */
public $children = array();
/** @var bool If set to true the node will be recognised as active */
public $isactive = false;
/** @var bool If set to true the node will be dimmed */
public $hidden = false;
/** @var bool If set to false the node will not be displayed */
public $display = true;
/** @var bool If set to true then an HR will be printed before the node */
public $preceedwithhr = false;
/** @var bool If set to true the the navigation bar should ignore this node */
public $mainnavonly = false;
/** @var bool If set to true a title will be added to the action no matter what */
public $forcetitle = false;
/** @var navigation_node A reference to the node parent, you should never set this directly you should always call set_parent */
public $parent = null;
/** @var bool Override to not display the icon even if one is provided **/
public $hideicon = false;
/** @var bool Set to true if we KNOW that this node can be expanded. */
public $isexpandable = false;
/** @var array */
protected $namedtypes = array(0 => 'system', 10 => 'category', 20 => 'course', 30 => 'structure', 40 => 'activity',
50 => 'resource', 60 => 'custom', 70 => 'setting', 71 => 'siteadmin', 80 => 'user',
90 => 'container');
/** @var moodle_url */
protected static $fullmeurl = null;
/** @var bool toogles auto matching of active node */
public static $autofindactive = true;
/** @var bool should we load full admin tree or rely on AJAX for performance reasons */
protected static $loadadmintree = false;
/** @var mixed If set to an int, that section will be included even if it has no activities */
public $includesectionnum = false;
/** @var bool does the node need to be loaded via ajax */
public $requiresajaxloading = false;
/** @var bool If set to true this node will be added to the "flat" navigation */
public $showinflatnavigation = false;
/**
* Constructs a new navigation_node
*
* @param array|string $properties Either an array of properties or a string to use
* as the text for the node
*/
public function __construct($properties) {
if (is_array($properties)) {
// Check the array for each property that we allow to set at construction.
// text - The main content for the node
// shorttext - A short text if required for the node
// icon - The icon to display for the node
// type - The type of the node
// key - The key to use to identify the node
// parent - A reference to the nodes parent
// action - The action to attribute to this node, usually a URL to link to
if (array_key_exists('text', $properties)) {
$this->text = $properties['text'];
}
if (array_key_exists('shorttext', $properties)) {
$this->shorttext = $properties['shorttext'];
}
if (!array_key_exists('icon', $properties)) {
$properties['icon'] = new pix_icon('i/navigationitem', '');
}
$this->icon = $properties['icon'];
if ($this->icon instanceof pix_icon) {
if (empty($this->icon->attributes['class'])) {
$this->icon->attributes['class'] = 'navicon';
} else {
$this->icon->attributes['class'] .= ' navicon';
}
}
if (array_key_exists('type', $properties)) {
$this->type = $properties['type'];
} else {
$this->type = self::TYPE_CUSTOM;
}
if (array_key_exists('key', $properties)) {
$this->key = $properties['key'];
}
// This needs to happen last because of the check_if_active call that occurs
if (array_key_exists('action', $properties)) {
$this->action = $properties['action'];
if (is_string($this->action)) {
$this->action = new moodle_url($this->action);
}
if (self::$autofindactive) {
$this->check_if_active();
}
}
if (array_key_exists('parent', $properties)) {
$this->set_parent($properties['parent']);
}
} else if (is_string($properties)) {
$this->text = $properties;
}
if ($this->text === null) {
throw new coding_exception('You must set the text for the node when you create it.');
}
// Instantiate a new navigation node collection for this nodes children
$this->children = new navigation_node_collection();
}
/**
* Checks if this node is the active node.
*
* This is determined by comparing the action for the node against the
* defined URL for the page. A match will see this node marked as active.
*
* @param int $strength One of URL_MATCH_EXACT, URL_MATCH_PARAMS, or URL_MATCH_BASE
* @return bool
*/
public function check_if_active($strength=URL_MATCH_EXACT) {
global $FULLME, $PAGE;
// Set fullmeurl if it hasn't already been set
if (self::$fullmeurl == null) {
if ($PAGE->has_set_url()) {
self::override_active_url(new moodle_url($PAGE->url));
} else {
self::override_active_url(new moodle_url($FULLME));
}
}
// Compare the action of this node against the fullmeurl
if ($this->action instanceof moodle_url && $this->action->compare(self::$fullmeurl, $strength)) {
$this->make_active();
return true;
}
return false;
}
/**
* True if this nav node has siblings in the tree.
*
* @return bool
*/
public function has_siblings() {
if (empty($this->parent) || empty($this->parent->children)) {
return false;
}
if ($this->parent->children instanceof navigation_node_collection) {
$count = $this->parent->children->count();
} else {
$count = count($this->parent->children);
}
return ($count > 1);
}
/**
* Get a list of sibling navigation nodes at the same level as this one.
*
* @return bool|array of navigation_node
*/
public function get_siblings() {
// Returns a list of the siblings of the current node for display in a flat navigation element. Either
// the in-page links or the breadcrumb links.
$siblings = false;
if ($this->has_siblings()) {
$siblings = [];
foreach ($this->parent->children as $child) {
if ($child->display) {
$siblings[] = $child;
}
}
}
return $siblings;
}
/**
* This sets the URL that the URL of new nodes get compared to when locating
* the active node.
*
* The active node is the node that matches the URL set here. By default this
* is either $PAGE->url or if that hasn't been set $FULLME.
*
* @param moodle_url $url The url to use for the fullmeurl.
* @param bool $loadadmintree use true if the URL point to administration tree
*/
public static function override_active_url(moodle_url $url, $loadadmintree = false) {
// Clone the URL, in case the calling script changes their URL later.
self::$fullmeurl = new moodle_url($url);
// True means we do not want AJAX loaded admin tree, required for all admin pages.
if ($loadadmintree) {
// Do not change back to false if already set.
self::$loadadmintree = true;
}
}
/**
* Use when page is linked from the admin tree,
* if not used navigation could not find the page using current URL
* because the tree is not fully loaded.
*/
public static function require_admin_tree() {
self::$loadadmintree = true;
}
/**
* Creates a navigation node, ready to add it as a child using add_node
* function. (The created node needs to be added before you can use it.)
* @param string $text
* @param moodle_url|action_link $action
* @param int $type
* @param string $shorttext
* @param string|int $key
* @param pix_icon $icon
* @return navigation_node
*/
public static function create($text, $action=null, $type=self::TYPE_CUSTOM,
$shorttext=null, $key=null, pix_icon $icon=null) {
// Properties array used when creating the new navigation node
$itemarray = array(
'text' => $text,
'type' => $type
);
// Set the action if one was provided
if ($action!==null) {
$itemarray['action'] = $action;
}
// Set the shorttext if one was provided
if ($shorttext!==null) {
$itemarray['shorttext'] = $shorttext;
}
// Set the icon if one was provided
if ($icon!==null) {
$itemarray['icon'] = $icon;
}
// Set the key
$itemarray['key'] = $key;
// Construct and return
return new navigation_node($itemarray);
}
/**
* Adds a navigation node as a child of this node.
*
* @param string $text
* @param moodle_url|action_link $action
* @param int $type
* @param string $shorttext
* @param string|int $key
* @param pix_icon $icon
* @return navigation_node
*/
public function add($text, $action=null, $type=self::TYPE_CUSTOM, $shorttext=null, $key=null, pix_icon $icon=null) {
// Create child node
$childnode = self::create($text, $action, $type, $shorttext, $key, $icon);
// Add the child to end and return
return $this->add_node($childnode);
}
/**
* Adds a navigation node as a child of this one, given a $node object
* created using the create function.
* @param navigation_node $childnode Node to add
* @param string $beforekey
* @return navigation_node The added node
*/
public function add_node(navigation_node $childnode, $beforekey=null) {
// First convert the nodetype for this node to a branch as it will now have children
if ($this->nodetype !== self::NODETYPE_BRANCH) {
$this->nodetype = self::NODETYPE_BRANCH;
}
// Set the parent to this node
$childnode->set_parent($this);
// Default the key to the number of children if not provided
if ($childnode->key === null) {
$childnode->key = $this->children->count();
}
// Add the child using the navigation_node_collections add method
$node = $this->children->add($childnode, $beforekey);
// If added node is a category node or the user is logged in and it's a course
// then mark added node as a branch (makes it expandable by AJAX)
$type = $childnode->type;
if (($type == self::TYPE_CATEGORY) || (isloggedin() && ($type == self::TYPE_COURSE)) || ($type == self::TYPE_MY_CATEGORY) ||
($type === self::TYPE_SITE_ADMIN)) {
$node->nodetype = self::NODETYPE_BRANCH;
}
// If this node is hidden mark it's children as hidden also
if ($this->hidden) {
$node->hidden = true;
}
// Return added node (reference returned by $this->children->add()
return $node;
}
/**
* Return a list of all the keys of all the child nodes.
* @return array the keys.
*/
public function get_children_key_list() {
return $this->children->get_key_list();
}
/**
* Searches for a node of the given type with the given key.
*
* This searches this node plus all of its children, and their children....
* If you know the node you are looking for is a child of this node then please
* use the get method instead.
*
* @param int|string $key The key of the node we are looking for
* @param int $type One of navigation_node::TYPE_*
* @return navigation_node|false
*/
public function find($key, $type) {
return $this->children->find($key, $type);
}
/**
* Walk the tree building up a list of all the flat navigation nodes.
*
* @param flat_navigation $nodes List of the found flat navigation nodes.
* @param boolean $showdivider Show a divider before the first node.
* @param string $label A label for the collection of navigation links.
*/
public function build_flat_navigation_list(flat_navigation $nodes, $showdivider = false, $label = '') {
if ($this->showinflatnavigation) {
$indent = 0;
if ($this->type == self::TYPE_COURSE || $this->key === self::COURSE_INDEX_PAGE) {
$indent = 1;
}
$flat = new flat_navigation_node($this, $indent);
$flat->set_showdivider($showdivider, $label);
$nodes->add($flat);
}
foreach ($this->children as $child) {
$child->build_flat_navigation_list($nodes, false);
}
}
/**
* Get the child of this node that has the given key + (optional) type.
*
* If you are looking for a node and want to search all children + their children
* then please use the find method instead.
*
* @param int|string $key The key of the node we are looking for
* @param int $type One of navigation_node::TYPE_*
* @return navigation_node|false
*/
public function get($key, $type=null) {
return $this->children->get($key, $type);
}
/**
* Removes this node.
*
* @return bool
*/
public function remove() {
return $this->parent->children->remove($this->key, $this->type);
}
/**
* Checks if this node has or could have any children
*
* @return bool Returns true if it has children or could have (by AJAX expansion)
*/
public function has_children() {
return ($this->nodetype === navigation_node::NODETYPE_BRANCH || $this->children->count()>0 || $this->isexpandable);
}
/**
* Marks this node as active and forces it open.
*
* Important: If you are here because you need to mark a node active to get
* the navigation to do what you want have you looked at {@link navigation_node::override_active_url()}?
* You can use it to specify a different URL to match the active navigation node on
* rather than having to locate and manually mark a node active.
*/
public function make_active() {
$this->isactive = true;
$this->add_class('active_tree_node');
$this->force_open();
if ($this->parent !== null) {
$this->parent->make_inactive();
}
}
/**
* Marks a node as inactive and recusised back to the base of the tree
* doing the same to all parents.
*/
public function make_inactive() {
$this->isactive = false;
$this->remove_class('active_tree_node');
if ($this->parent !== null) {
$this->parent->make_inactive();
}
}
/**
* Forces this node to be open and at the same time forces open all
* parents until the root node.
*
* Recursive.
*/
public function force_open() {
$this->forceopen = true;
if ($this->parent !== null) {
$this->parent->force_open();
}
}
/**
* Adds a CSS class to this node.
*
* @param string $class
* @return bool
*/
public function add_class($class) {
if (!in_array($class, $this->classes)) {
$this->classes[] = $class;
}
return true;
}
/**
* Removes a CSS class from this node.
*
* @param string $class
* @return bool True if the class was successfully removed.
*/
public function remove_class($class) {
if (in_array($class, $this->classes)) {
$key = array_search($class,$this->classes);
if ($key!==false) {
// Remove the class' array element.
unset($this->classes[$key]);
// Reindex the array to avoid failures when the classes array is iterated later in mustache templates.
$this->classes = array_values($this->classes);
return true;
}
}
return false;
}
/**
* Sets the title for this node and forces Moodle to utilise it.
* @param string $title
*/
public function title($title) {
$this->title = $title;
$this->forcetitle = true;
}
/**
* Resets the page specific information on this node if it is being unserialised.
*/
public function __wakeup(){
$this->forceopen = false;
$this->isactive = false;
$this->remove_class('active_tree_node');
}
/**
* Checks if this node or any of its children contain the active node.
*
* Recursive.
*
* @return bool
*/
public function contains_active_node() {
if ($this->isactive) {
return true;
} else {
foreach ($this->children as $child) {
if ($child->isactive || $child->contains_active_node()) {
return true;
}
}
}
return false;
}
/**
* To better balance the admin tree, we want to group all the short top branches together.
*
* This means < 8 nodes and no subtrees.
*
* @return bool
*/
public function is_short_branch() {
$limit = 8;
if ($this->children->count() >= $limit) {
return false;
}
foreach ($this->children as $child) {
if ($child->has_children()) {
return false;
}
}
return true;
}
/**
* Finds the active node.
*
* Searches this nodes children plus all of the children for the active node
* and returns it if found.
*
* Recursive.
*
* @return navigation_node|false
*/
public function find_active_node() {
if ($this->isactive) {
return $this;
} else {
foreach ($this->children as &$child) {
$outcome = $child->find_active_node();
if ($outcome !== false) {
return $outcome;
}
}
}
return false;
}
/**
* Searches all children for the best matching active node
* @return navigation_node|false
*/
public function search_for_active_node() {
if ($this->check_if_active(URL_MATCH_BASE)) {
return $this;
} else {
foreach ($this->children as &$child) {
$outcome = $child->search_for_active_node();
if ($outcome !== false) {
return $outcome;
}
}
}
return false;
}
/**
* Gets the content for this node.
*
* @param bool $shorttext If true shorttext is used rather than the normal text
* @return string
*/
public function get_content($shorttext=false) {
if ($shorttext && $this->shorttext!==null) {
return format_string($this->shorttext);
} else {
return format_string($this->text);
}
}
/**
* Gets the title to use for this node.
*
* @return string
*/
public function get_title() {
if ($this->forcetitle || $this->action != null){
return $this->title;
} else {
return '';
}
}
/**
* Used to easily determine if this link in the breadcrumbs has a valid action/url.
*
* @return boolean
*/
public function has_action() {
return !empty($this->action);
}
/**
* Used to easily determine if this link in the breadcrumbs is hidden.
*
* @return boolean
*/
public function is_hidden() {
return $this->hidden;
}
/**
* Gets the CSS class to add to this node to describe its type
*
* @return string
*/
public function get_css_type() {
if (array_key_exists($this->type, $this->namedtypes)) {
return 'type_'.$this->namedtypes[$this->type];
}
return 'type_unknown';
}
/**
* Finds all nodes that are expandable by AJAX
*
* @param array $expandable An array by reference to populate with expandable nodes.
*/
public function find_expandable(array &$expandable) {
foreach ($this->children as &$child) {
if ($child->display && $child->has_children() && $child->children->count() == 0) {
$child->id = 'expandable_branch_'.$child->type.'_'.clean_param($child->key, PARAM_ALPHANUMEXT);
$this->add_class('canexpand');
$child->requiresajaxloading = true;
$expandable[] = array('id' => $child->id, 'key' => $child->key, 'type' => $child->type);
}
$child->find_expandable($expandable);
}
}
/**
* Finds all nodes of a given type (recursive)
*
* @param int $type One of navigation_node::TYPE_*
* @return array
*/
public function find_all_of_type($type) {
$nodes = $this->children->type($type);
foreach ($this->children as &$node) {
$childnodes = $node->find_all_of_type($type);
$nodes = array_merge($nodes, $childnodes);
}
return $nodes;
}
/**
* Removes this node if it is empty
*/
public function trim_if_empty() {
if ($this->children->count() == 0) {
$this->remove();
}
}
/**
* Creates a tab representation of this nodes children that can be used
* with print_tabs to produce the tabs on a page.
*
* call_user_func_array('print_tabs', $node->get_tabs_array());
*
* @param array $inactive
* @param bool $return
* @return array Array (tabs, selected, inactive, activated, return)
*/
public function get_tabs_array(array $inactive=array(), $return=false) {
$tabs = array();
$rows = array();
$selected = null;
$activated = array();
foreach ($this->children as $node) {
$tabs[] = new tabobject($node->key, $node->action, $node->get_content(), $node->get_title());
if ($node->contains_active_node()) {
if ($node->children->count() > 0) {
$activated[] = $node->key;
foreach ($node->children as $child) {
if ($child->contains_active_node()) {
$selected = $child->key;
}
$rows[] = new tabobject($child->key, $child->action, $child->get_content(), $child->get_title());
}
} else {
$selected = $node->key;
}
}
}
return array(array($tabs, $rows), $selected, $inactive, $activated, $return);
}
/**
* Sets the parent for this node and if this node is active ensures that the tree is properly
* adjusted as well.
*
* @param navigation_node $parent
*/
public function set_parent(navigation_node $parent) {
// Set the parent (thats the easy part)
$this->parent = $parent;
// Check if this node is active (this is checked during construction)
if ($this->isactive) {
// Force all of the parent nodes open so you can see this node
$this->parent->force_open();
// Make all parents inactive so that its clear where we are.
$this->parent->make_inactive();
}
}
/**
* Hides the node and any children it has.
*
* @since Moodle 2.5
* @param array $typestohide Optional. An array of node types that should be hidden.
* If null all nodes will be hidden.
* If an array is given then nodes will only be hidden if their type mtatches an element in the array.
* e.g. array(navigation_node::TYPE_COURSE) would hide only course nodes.
*/
public function hide(array $typestohide = null) {
if ($typestohide === null || in_array($this->type, $typestohide)) {
$this->display = false;
if ($this->has_children()) {
foreach ($this->children as $child) {
$child->hide($typestohide);
}
}
}
}
/**
* Get the action url for this navigation node.
* Called from templates.
*
* @since Moodle 3.2
*/
public function action() {
if ($this->action instanceof moodle_url) {
return $this->action;
} else if ($this->action instanceof action_link) {
return $this->action->url;
}
return $this->action;
}
/**
* Add the menu item to handle locking and unlocking of a conext.
*
* @param \navigation_node $node Node to add
* @param \context $context The context to be locked
*/
protected function add_context_locking_node(\navigation_node $node, \context $context) {
global $CFG;
// Manage context locking.
if (!empty($CFG->contextlocking) && has_capability('moodle/site:managecontextlocks', $context)) {
$parentcontext = $context->get_parent_context();
if (empty($parentcontext) || !$parentcontext->locked) {
if ($context->locked) {
$lockicon = 'i/unlock';
$lockstring = get_string('managecontextunlock', 'admin');
} else {
$lockicon = 'i/lock';
$lockstring = get_string('managecontextlock', 'admin');
}
$node->add(
$lockstring,
new moodle_url(
'/admin/lock.php',
[
'id' => $context->id,
]
),
self::TYPE_SETTING,
null,
'contextlocking',
new pix_icon($lockicon, '')
);
}
}
}
}
/**
* Navigation node collection
*
* This class is responsible for managing a collection of navigation nodes.
* It is required because a node's unique identifier is a combination of both its
* key and its type.
*
* Originally an array was used with a string key that was a combination of the two
* however it was decided that a better solution would be to use a class that
* implements the standard IteratorAggregate interface.
*
* @package core
* @category navigation
* @copyright 2010 Sam Hemelryk
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class navigation_node_collection implements IteratorAggregate, Countable {
/**
* A multidimensional array to where the first key is the type and the second
* key is the nodes key.
* @var array
*/
protected $collection = array();
/**
* An array that contains references to nodes in the same order they were added.
* This is maintained as a progressive array.
* @var array
*/
protected $orderedcollection = array();
/**
* A reference to the last node that was added to the collection
* @var navigation_node
*/
protected $last = null;
/**
* The total number of items added to this array.
* @var int
*/
protected $count = 0;
/**
* Label for collection of nodes.
* @var string
*/
protected $collectionlabel = '';
/**
* Adds a navigation node to the collection
*
* @param navigation_node $node Node to add
* @param string $beforekey If specified, adds before a node with this key,
* otherwise adds at end
* @return navigation_node Added node
*/
public function add(navigation_node $node, $beforekey=null) {
global $CFG;
$key = $node->key;
$type = $node->type;
// First check we have a 2nd dimension for this type
if (!array_key_exists($type, $this->orderedcollection)) {
$this->orderedcollection[$type] = array();
}
// Check for a collision and report if debugging is turned on
if ($CFG->debug && array_key_exists($key, $this->orderedcollection[$type])) {
debugging('Navigation node intersect: Adding a node that already exists '.$key, DEBUG_DEVELOPER);
}
// Find the key to add before
$newindex = $this->count;
$last = true;
if ($beforekey !== null) {
foreach ($this->collection as $index => $othernode) {
if ($othernode->key === $beforekey) {
$newindex = $index;
$last = false;
break;
}
}
if ($newindex === $this->count) {
debugging('Navigation node add_before: Reference node not found ' . $beforekey .
', options: ' . implode(' ', $this->get_key_list()), DEBUG_DEVELOPER);
}
}
// Add the node to the appropriate place in the by-type structure (which
// is not ordered, despite the variable name)
$this->orderedcollection[$type][$key] = $node;
if (!$last) {
// Update existing references in the ordered collection (which is the
// one that isn't called 'ordered') to shuffle them along if required
for ($oldindex = $this->count; $oldindex > $newindex; $oldindex--) {
$this->collection[$oldindex] = $this->collection[$oldindex - 1];
}
}
// Add a reference to the node to the progressive collection.
$this->collection[$newindex] = $this->orderedcollection[$type][$key];
// Update the last property to a reference to this new node.
$this->last = $this->orderedcollection[$type][$key];
// Reorder the array by index if needed
if (!$last) {
ksort($this->collection);
}
$this->count++;
// Return the reference to the now added node
return $node;
}
/**
* Return a list of all the keys of all the nodes.
* @return array the keys.
*/
public function get_key_list() {
$keys = array();
foreach ($this->collection as $node) {
$keys[] = $node->key;
}
return $keys;
}
/**
* Set a label for this collection.
*
* @param string $label
*/
public function set_collectionlabel($label) {
$this->collectionlabel = $label;
}
/**
* Return a label for this collection.
*
* @return string
*/
public function get_collectionlabel() {
return $this->collectionlabel;
}
/**
* Fetches a node from this collection.
*
* @param string|int $key The key of the node we want to find.
* @param int $type One of navigation_node::TYPE_*.
* @return navigation_node|null
*/
public function get($key, $type=null) {
if ($type !== null) {
// If the type is known then we can simply check and fetch
if (!empty($this->orderedcollection[$type][$key])) {
return $this->orderedcollection[$type][$key];
}
} else {
// Because we don't know the type we look in the progressive array
foreach ($this->collection as $node) {
if ($node->key === $key) {
return $node;
}
}
}
return false;
}
/**
* Searches for a node with matching key and type.
*
* This function searches both the nodes in this collection and all of
* the nodes in each collection belonging to the nodes in this collection.
*
* Recursive.
*
* @param string|int $key The key of the node we want to find.
* @param int $type One of navigation_node::TYPE_*.
* @return navigation_node|null
*/
public function find($key, $type=null) {
if ($type !== null && array_key_exists($type, $this->orderedcollection) && array_key_exists($key, $this->orderedcollection[$type])) {
return $this->orderedcollection[$type][$key];
} else {
$nodes = $this->getIterator();
// Search immediate children first
foreach ($nodes as &$node) {
if ($node->key === $key && ($type === null || $type === $node->type)) {
return $node;
}
}
// Now search each childs children
foreach ($nodes as &$node) {
$result = $node->children->find($key, $type);
if ($result !== false) {
return $result;
}
}
}
return false;
}
/**
* Fetches the last node that was added to this collection
*
* @return navigation_node
*/
public function last() {
return $this->last;
}
/**
* Fetches all nodes of a given type from this collection
*
* @param string|int $type node type being searched for.
* @return array ordered collection
*/
public function type($type) {
if (!array_key_exists($type, $this->orderedcollection)) {
$this->orderedcollection[$type] = array();
}
return $this->orderedcollection[$type];
}
/**
* Removes the node with the given key and type from the collection
*
* @param string|int $key The key of the node we want to find.
* @param int $type
* @return bool
*/
public function remove($key, $type=null) {
$child = $this->get($key, $type);
if ($child !== false) {
foreach ($this->collection as $colkey => $node) {
if ($node->key === $key && (is_null($type) || $node->type == $type)) {
unset($this->collection[$colkey]);
$this->collection = array_values($this->collection);
break;
}
}
unset($this->orderedcollection[$child->type][$child->key]);
$this->count--;
return true;
}
return false;
}
/**
* Gets the number of nodes in this collection
*
* This option uses an internal count rather than counting the actual options to avoid
* a performance hit through the count function.
*
* @return int
*/
public function count() {
return $this->count;
}
/**
* Gets an array iterator for the collection.
*
* This is required by the IteratorAggregator interface and is used by routines
* such as the foreach loop.
*
* @return ArrayIterator
*/
public function getIterator() {
return new ArrayIterator($this->collection);
}
}
/**
* The global navigation class used for... the global navigation
*
* This class is used by PAGE to store the global navigation for the site
* and is then used by the settings nav and navbar to save on processing and DB calls
*
* See
* {@link lib/pagelib.php} {@link moodle_page::initialise_theme_and_output()}
* {@link lib/ajax/getnavbranch.php} Called by ajax
*
* @package core
* @category navigation
* @copyright 2009 Sam Hemelryk
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class global_navigation extends navigation_node {
/** @var moodle_page The Moodle page this navigation object belongs to. */
protected $page;
/** @var bool switch to let us know if the navigation object is initialised*/
protected $initialised = false;
/** @var array An array of course information */
protected $mycourses = array();
/** @var navigation_node[] An array for containing root navigation nodes */
protected $rootnodes = array();
/** @var bool A switch for whether to show empty sections in the navigation */
protected $showemptysections = true;
/** @var bool A switch for whether courses should be shown within categories on the navigation. */
protected $showcategories = null;
/** @var null@var bool A switch for whether or not to show categories in the my courses branch. */
protected $showmycategories = null;
/** @var array An array of stdClasses for users that the navigation is extended for */
protected $extendforuser = array();
/** @var navigation_cache */
protected $cache;
/** @var array An array of course ids that are present in the navigation */
protected $addedcourses = array();
/** @var bool */
protected $allcategoriesloaded = false;
/** @var array An array of category ids that are included in the navigation */
protected $addedcategories = array();
/** @var int expansion limit */
protected $expansionlimit = 0;
/** @var int userid to allow parent to see child's profile page navigation */
protected $useridtouseforparentchecks = 0;
/** @var cache_session A cache that stores information on expanded courses */
protected $cacheexpandcourse = null;
/** Used when loading categories to load all top level categories [parent = 0] **/
const LOAD_ROOT_CATEGORIES = 0;
/** Used when loading categories to load all categories **/
const LOAD_ALL_CATEGORIES = -1;
/**
* Constructs a new global navigation
*
* @param moodle_page $page The page this navigation object belongs to
*/
public function __construct(moodle_page $page) {
global $CFG, $SITE, $USER;
if (during_initial_install()) {
return;
}
if (get_home_page() == HOMEPAGE_SITE) {
// We are using the site home for the root element
$properties = array(
'key' => 'home',
'type' => navigation_node::TYPE_SYSTEM,
'text' => get_string('home'),
'action' => new moodle_url('/'),
'icon' => new pix_icon('i/home', '')
);
} else {
// We are using the users my moodle for the root element
$properties = array(
'key' => 'myhome',
'type' => navigation_node::TYPE_SYSTEM,
'text' => get_string('myhome'),
'action' => new moodle_url('/my/'),
'icon' => new pix_icon('i/dashboard', '')
);
}
// Use the parents constructor.... good good reuse
parent::__construct($properties);
$this->showinflatnavigation = true;
// Initalise and set defaults
$this->page = $page;
$this->forceopen = true;
$this->cache = new navigation_cache(NAVIGATION_CACHE_NAME);
}
/**
* Mutator to set userid to allow parent to see child's profile
* page navigation. See MDL-25805 for initial issue. Linked to it
* is an issue explaining why this is a REALLY UGLY HACK thats not
* for you to use!
*
* @param int $userid userid of profile page that parent wants to navigate around.
*/
public function set_userid_for_parent_checks($userid) {
$this->useridtouseforparentchecks = $userid;
}
/**
* Initialises the navigation object.
*
* This causes the navigation object to look at the current state of the page
* that it is associated with and then load the appropriate content.
*
* This should only occur the first time that the navigation structure is utilised
* which will normally be either when the navbar is called to be displayed or
* when a block makes use of it.
*
* @return bool
*/
public function initialise() {
global $CFG, $SITE, $USER;
// Check if it has already been initialised
if ($this->initialised || during_initial_install()) {
return true;
}
$this->initialised = true;
// Set up the five base root nodes. These are nodes where we will put our
// content and are as follows:
// site: Navigation for the front page.
// myprofile: User profile information goes here.
// currentcourse: The course being currently viewed.
// mycourses: The users courses get added here.
// courses: Additional courses are added here.
// users: Other users information loaded here.
$this->rootnodes = array();
if (get_home_page() == HOMEPAGE_SITE) {
// The home element should be my moodle because the root element is the site
if (isloggedin() && !isguestuser()) { // Makes no sense if you aren't logged in
$this->rootnodes['home'] = $this->add(get_string('myhome'), new moodle_url('/my/'),
self::TYPE_SETTING, null, 'myhome', new pix_icon('i/dashboard', ''));
$this->rootnodes['home']->showinflatnavigation = true;
}
} else {
// The home element should be the site because the root node is my moodle
$this->rootnodes['home'] = $this->add(get_string('sitehome'), new moodle_url('/'),
self::TYPE_SETTING, null, 'home', new pix_icon('i/home', ''));
$this->rootnodes['home']->showinflatnavigation = true;
if (!empty($CFG->defaulthomepage) && ($CFG->defaulthomepage == HOMEPAGE_MY)) {
// We need to stop automatic redirection
$this->rootnodes['home']->action->param('redirect', '0');
}
}
$this->rootnodes['site'] = $this->add_course($SITE);
$this->rootnodes['myprofile'] = $this->add(get_string('profile'), null, self::TYPE_USER, null, 'myprofile');
$this->rootnodes['currentcourse'] = $this->add(get_string('currentcourse'), null, self::TYPE_ROOTNODE, null, 'currentcourse');
$this->rootnodes['mycourses'] = $this->add(get_string('mycourses'), null, self::TYPE_ROOTNODE, null, 'mycourses', new pix_icon('i/course', ''));
$this->rootnodes['courses'] = $this->add(get_string('courses'), new moodle_url('/course/index.php'), self::TYPE_ROOTNODE, null, 'courses');
if (!core_course_category::user_top()) {
$this->rootnodes['courses']->hide();
}
$this->rootnodes['users'] = $this->add(get_string('users'), null, self::TYPE_ROOTNODE, null, 'users');
// We always load the frontpage course to ensure it is available without
// JavaScript enabled.
$this->add_front_page_course_essentials($this->rootnodes['site'], $SITE);
$this->load_course_sections($SITE, $this->rootnodes['site']);
$course = $this->page->course;
$this->load_courses_enrolled();
// $issite gets set to true if the current pages course is the sites frontpage course
$issite = ($this->page->course->id == $SITE->id);
// Determine if the user is enrolled in any course.
$enrolledinanycourse = enrol_user_sees_own_courses();
$this->rootnodes['currentcourse']->mainnavonly = true;
if ($enrolledinanycourse) {
$this->rootnodes['mycourses']->isexpandable = true;
$this->rootnodes['mycourses']->showinflatnavigation = true;
if ($CFG->navshowallcourses) {
// When we show all courses we need to show both the my courses and the regular courses branch.
$this->rootnodes['courses']->isexpandable = true;
}
} else {
$this->rootnodes['courses']->isexpandable = true;
}
$this->rootnodes['mycourses']->forceopen = true;
$canviewcourseprofile = true;
// Next load context specific content into the navigation
switch ($this->page->context->contextlevel) {
case CONTEXT_SYSTEM :
// Nothing left to do here I feel.
break;
case CONTEXT_COURSECAT :
// This is essential, we must load categories.
$this->load_all_categories($this->page->context->instanceid, true);
break;
case CONTEXT_BLOCK :
case CONTEXT_COURSE :
if ($issite) {
// Nothing left to do here.
break;
}
// Load the course associated with the current page into the navigation.
$coursenode = $this->add_course($course, false, self::COURSE_CURRENT);
// If the course wasn't added then don't try going any further.
if (!$coursenode) {
$canviewcourseprofile = false;
break;
}
// If the user is not enrolled then we only want to show the
// course node and not populate it.
// Not enrolled, can't view, and hasn't switched roles
if (!can_access_course($course, null, '', true)) {
if ($coursenode->isexpandable === true) {
// Obviously the situation has changed, update the cache and adjust the node.
// This occurs if the user access to a course has been revoked (one way or another) after
// initially logging in for this session.
$this->get_expand_course_cache()->set($course->id, 1);
$coursenode->isexpandable = true;
$coursenode->nodetype = self::NODETYPE_BRANCH;
}
// Very ugly hack - do not force "parents" to enrol into course their child is enrolled in,
// this hack has been propagated from user/view.php to display the navigation node. (MDL-25805)
if (!$this->current_user_is_parent_role()) {
$coursenode->make_active();
$canviewcourseprofile = false;
break;
}
} else if ($coursenode->isexpandable === false) {
// Obviously the situation has changed, update the cache and adjust the node.
// This occurs if the user has been granted access to a course (one way or another) after initially
// logging in for this session.
$this->get_expand_course_cache()->set($course->id, 1);
$coursenode->isexpandable = true;
$coursenode->nodetype = self::NODETYPE_BRANCH;
}
// Add the essentials such as reports etc...
$this->add_course_essentials($coursenode, $course);
// Extend course navigation with it's sections/activities
$this->load_course_sections($course, $coursenode);
if (!$coursenode->contains_active_node() && !$coursenode->search_for_active_node()) {
$coursenode->make_active();
}
break;
case CONTEXT_MODULE :
if ($issite) {
// If this is the site course then most information will have
// already been loaded.
// However we need to check if there is more content that can
// yet be loaded for the specific module instance.
$activitynode = $this->rootnodes['site']->find($this->page->cm->id, navigation_node::TYPE_ACTIVITY);
if ($activitynode) {
$this->load_activity($this->page->cm, $this->page->course, $activitynode);
}
break;
}
$course = $this->page->course;
$cm = $this->page->cm;
// Load the course associated with the page into the navigation
$coursenode = $this->add_course($course, false, self::COURSE_CURRENT);
// If the course wasn't added then don't try going any further.
if (!$coursenode) {
$canviewcourseprofile = false;
break;
}
// If the user is not enrolled then we only want to show the
// course node and not populate it.
if (!can_access_course($course, null, '', true)) {
$coursenode->make_active();
$canviewcourseprofile = false;
break;
}
$this->add_course_essentials($coursenode, $course);
// Load the course sections into the page
$this->load_course_sections($course, $coursenode, null, $cm);
$activity = $coursenode->find($cm->id, navigation_node::TYPE_ACTIVITY);
if (!empty($activity)) {
// Finally load the cm specific navigaton information
$this->load_activity($cm, $course, $activity);
// Check if we have an active ndoe
if (!$activity->contains_active_node() && !$activity->search_for_active_node()) {
// And make the activity node active.
$activity->make_active();
}
}
break;
case CONTEXT_USER :
if ($issite) {
// The users profile information etc is already loaded
// for the front page.
break;
}
$course = $this->page->course;
// Load the course associated with the user into the navigation
$coursenode = $this->add_course($course, false, self::COURSE_CURRENT);
// If the course wasn't added then don't try going any further.
if (!$coursenode) {
$canviewcourseprofile = false;
break;
}
// If the user is not enrolled then we only want to show the
// course node and not populate it.
if (!can_access_course($course, null, '', true)) {
$coursenode->make_active();
$canviewcourseprofile = false;
break;
}
$this->add_course_essentials($coursenode, $course);
$this->load_course_sections($course, $coursenode);
break;
}
// Load for the current user
$this->load_for_user();
if ($this->page->context->contextlevel >= CONTEXT_COURSE && $this->page->context->instanceid != $SITE->id && $canviewcourseprofile) {
$this->load_for_user(null, true);
}
// Load each extending user into the navigation.
foreach ($this->extendforuser as $user) {
if ($user->id != $USER->id) {
$this->load_for_user($user);
}
}
// Give the local plugins a chance to include some navigation if they want.
$this->load_local_plugin_navigation();
// Remove any empty root nodes
foreach ($this->rootnodes as $node) {
// Dont remove the home node
/** @var navigation_node $node */
if (!in_array($node->key, ['home', 'myhome']) && !$node->has_children() && !$node->isactive) {
$node->remove();
}
}
if (!$this->contains_active_node()) {
$this->search_for_active_node();
}
// If the user is not logged in modify the navigation structure as detailed
// in {@link http://docs.moodle.org/dev/Navigation_2.0_structure}
if (!isloggedin()) {
$activities = clone($this->rootnodes['site']->children);
$this->rootnodes['site']->remove();
$children = clone($this->children);
$this->children = new navigation_node_collection();
foreach ($activities as $child) {
$this->children->add($child);
}
foreach ($children as $child) {
$this->children->add($child);
}
}
return true;
}
/**
* This function gives local plugins an opportunity to modify navigation.
*/
protected function load_local_plugin_navigation() {
foreach (get_plugin_list_with_function('local', 'extend_navigation') as $function) {
$function($this);
}
}
/**
* Returns true if the current user is a parent of the user being currently viewed.
*
* If the current user is not viewing another user, or if the current user does not hold any parent roles over the
* other user being viewed this function returns false.
* In order to set the user for whom we are checking against you must call {@link set_userid_for_parent_checks()}
*
* @since Moodle 2.4
* @return bool
*/
protected function current_user_is_parent_role() {
global $USER, $DB;
if ($this->useridtouseforparentchecks && $this->useridtouseforparentchecks != $USER->id) {
$usercontext = context_user::instance($this->useridtouseforparentchecks, MUST_EXIST);
if (!has_capability('moodle/user:viewdetails', $usercontext)) {
return false;
}
if ($DB->record_exists('role_assignments', array('userid' => $USER->id, 'contextid' => $usercontext->id))) {
return true;
}
}
return false;
}
/**
* Returns true if courses should be shown within categories on the navigation.
*
* @param bool $ismycourse Set to true if you are calculating this for a course.
* @return bool
*/
protected function show_categories($ismycourse = false) {
global $CFG, $DB;
if ($ismycourse) {
return $this->show_my_categories();
}
if ($this->showcategories === null) {
$show = false;
if ($this->page->context->contextlevel == CONTEXT_COURSECAT) {
$show = true;
} else if (!empty($CFG->navshowcategories) && $DB->count_records('course_categories') > 1) {
$show = true;
}
$this->showcategories = $show;
}
return $this->showcategories;
}
/**
* Returns true if we should show categories in the My Courses branch.
* @return bool
*/
protected function show_my_categories() {
global $CFG;
if ($this->showmycategories === null) {
$this->showmycategories = !empty($CFG->navshowmycoursecategories) && !core_course_category::is_simple_site();
}
return $this->showmycategories;
}
/**
* Loads the courses in Moodle into the navigation.
*
* @global moodle_database $DB
* @param string|array $categoryids An array containing categories to load courses
* for, OR null to load courses for all categories.
* @return array An array of navigation_nodes one for each course
*/
protected function load_all_courses($categoryids = null) {
global $CFG, $DB, $SITE;
// Work out the limit of courses.
$limit = 20;
if (!empty($CFG->navcourselimit)) {
$limit = $CFG->navcourselimit;
}
$toload = (empty($CFG->navshowallcourses))?self::LOAD_ROOT_CATEGORIES:self::LOAD_ALL_CATEGORIES;
// If we are going to show all courses AND we are showing categories then
// to save us repeated DB calls load all of the categories now
if ($this->show_categories()) {
$this->load_all_categories($toload);
}
// Will be the return of our efforts
$coursenodes = array();
// Check if we need to show categories.
if ($this->show_categories()) {
// Hmmm we need to show categories... this is going to be painful.
// We now need to fetch up to $limit courses for each category to
// be displayed.
if ($categoryids !== null) {
if (!is_array($categoryids)) {
$categoryids = array($categoryids);
}
list($categorywhere, $categoryparams) = $DB->get_in_or_equal($categoryids, SQL_PARAMS_NAMED, 'cc');
$categorywhere = 'WHERE cc.id '.$categorywhere;
} else if ($toload == self::LOAD_ROOT_CATEGORIES) {
$categorywhere = 'WHERE cc.depth = 1 OR cc.depth = 2';
$categoryparams = array();
} else {
$categorywhere = '';
$categoryparams = array();
}
// First up we are going to get the categories that we are going to
// need so that we can determine how best to load the courses from them.
$sql = "SELECT cc.id, COUNT(c.id) AS coursecount
FROM {course_categories} cc
LEFT JOIN {course} c ON c.category = cc.id
{$categorywhere}
GROUP BY cc.id";
$categories = $DB->get_recordset_sql($sql, $categoryparams);
$fullfetch = array();
$partfetch = array();
foreach ($categories as $category) {
if (!$this->can_add_more_courses_to_category($category->id)) {
continue;
}
if ($category->coursecount > $limit * 5) {
$partfetch[] = $category->id;
} else if ($category->coursecount > 0) {
$fullfetch[] = $category->id;
}
}
$categories->close();
if (count($fullfetch)) {
// First up fetch all of the courses in categories where we know that we are going to
// need the majority of courses.
list($categoryids, $categoryparams) = $DB->get_in_or_equal($fullfetch, SQL_PARAMS_NAMED, 'lcategory');
$ccselect = ', ' . context_helper::get_preload_record_columns_sql('ctx');
$ccjoin = "LEFT JOIN {context} ctx ON (ctx.instanceid = c.id AND ctx.contextlevel = :contextlevel)";
$categoryparams['contextlevel'] = CONTEXT_COURSE;
$sql = "SELECT c.id, c.sortorder, c.visible, c.fullname, c.shortname, c.category $ccselect
FROM {course} c
$ccjoin
WHERE c.category {$categoryids}
ORDER BY c.sortorder ASC";
$coursesrs = $DB->get_recordset_sql($sql, $categoryparams);
foreach ($coursesrs as $course) {
if ($course->id == $SITE->id) {
// This should not be necessary, frontpage is not in any category.
continue;
}
if (array_key_exists($course->id, $this->addedcourses)) {
// It is probably better to not include the already loaded courses
// directly in SQL because inequalities may confuse query optimisers
// and may interfere with query caching.
continue;
}
if (!$this->can_add_more_courses_to_category($course->category)) {
continue;
}
context_helper::preload_from_record($course);
if (!$course->visible && !is_role_switched($course->id) && !has_capability('moodle/course:viewhiddencourses', context_course::instance($course->id))) {
continue;
}
$coursenodes[$course->id] = $this->add_course($course);
}
$coursesrs->close();
}
if (count($partfetch)) {
// Next we will work our way through the categories where we will likely only need a small
// proportion of the courses.
foreach ($partfetch as $categoryid) {
$ccselect = ', ' . context_helper::get_preload_record_columns_sql('ctx');
$ccjoin = "LEFT JOIN {context} ctx ON (ctx.instanceid = c.id AND ctx.contextlevel = :contextlevel)";
$sql = "SELECT c.id, c.sortorder, c.visible, c.fullname, c.shortname, c.category $ccselect
FROM {course} c
$ccjoin
WHERE c.category = :categoryid
ORDER BY c.sortorder ASC";
$courseparams = array('categoryid' => $categoryid, 'contextlevel' => CONTEXT_COURSE);
$coursesrs = $DB->get_recordset_sql($sql, $courseparams, 0, $limit * 5);
foreach ($coursesrs as $course) {
if ($course->id == $SITE->id) {
// This should not be necessary, frontpage is not in any category.
continue;
}
if (array_key_exists($course->id, $this->addedcourses)) {
// It is probably better to not include the already loaded courses
// directly in SQL because inequalities may confuse query optimisers
// and may interfere with query caching.
// This also helps to respect expected $limit on repeated executions.
continue;
}
if (!$this->can_add_more_courses_to_category($course->category)) {
break;
}
context_helper::preload_from_record($course);
if (!$course->visible && !is_role_switched($course->id) && !has_capability('moodle/course:viewhiddencourses', context_course::instance($course->id))) {
continue;
}
$coursenodes[$course->id] = $this->add_course($course);
}
$coursesrs->close();
}
}
} else {
// Prepare the SQL to load the courses and their contexts
list($courseids, $courseparams) = $DB->get_in_or_equal(array_keys($this->addedcourses), SQL_PARAMS_NAMED, 'lc', false);
$ccselect = ', ' . context_helper::get_preload_record_columns_sql('ctx');
$ccjoin = "LEFT JOIN {context} ctx ON (ctx.instanceid = c.id AND ctx.contextlevel = :contextlevel)";
$courseparams['contextlevel'] = CONTEXT_COURSE;
$sql = "SELECT c.id, c.sortorder, c.visible, c.fullname, c.shortname, c.category $ccselect
FROM {course} c
$ccjoin
WHERE c.id {$courseids}
ORDER BY c.sortorder ASC";
$coursesrs = $DB->get_recordset_sql($sql, $courseparams);
foreach ($coursesrs as $course) {
if ($course->id == $SITE->id) {
// frotpage is not wanted here
continue;
}
if ($this->page->course && ($this->page->course->id == $course->id)) {
// Don't include the currentcourse in this nodelist - it's displayed in the Current course node
continue;
}
context_helper::preload_from_record($course);
if (!$course->visible && !is_role_switched($course->id) && !has_capability('moodle/course:viewhiddencourses', context_course::instance($course->id))) {
continue;
}
$coursenodes[$course->id] = $this->add_course($course);
if (count($coursenodes) >= $limit) {
break;
}
}
$coursesrs->close();
}
return $coursenodes;
}
/**
* Returns true if more courses can be added to the provided category.
*
* @param int|navigation_node|stdClass $category
* @return bool
*/
protected function can_add_more_courses_to_category($category) {
global $CFG;
$limit = 20;
if (!empty($CFG->navcourselimit)) {
$limit = (int)$CFG->navcourselimit;
}
if (is_numeric($category)) {
if (!array_key_exists($category, $this->addedcategories)) {
return true;
}
$coursecount = count($this->addedcategories[$category]->children->type(self::TYPE_COURSE));
} else if ($category instanceof navigation_node) {
if (($category->type != self::TYPE_CATEGORY) || ($category->type != self::TYPE_MY_CATEGORY)) {
return false;
}
$coursecount = count($category->children->type(self::TYPE_COURSE));
} else if (is_object($category) && property_exists($category,'id')) {
$coursecount = count($this->addedcategories[$category->id]->children->type(self::TYPE_COURSE));
}
return ($coursecount <= $limit);
}
/**
* Loads all categories (top level or if an id is specified for that category)
*
* @param int $categoryid The category id to load or null/0 to load all base level categories
* @param bool $showbasecategories If set to true all base level categories will be loaded as well
* as the requested category and any parent categories.
* @return navigation_node|void returns a navigation node if a category has been loaded.
*/
protected function load_all_categories($categoryid = self::LOAD_ROOT_CATEGORIES, $showbasecategories = false) {
global $CFG, $DB;
// Check if this category has already been loaded
if ($this->allcategoriesloaded || ($categoryid < 1 && $this->is_category_fully_loaded($categoryid))) {
return true;
}
$catcontextsql = context_helper::get_preload_record_columns_sql('ctx');
$sqlselect = "SELECT cc.*, $catcontextsql
FROM {course_categories} cc
JOIN {context} ctx ON cc.id = ctx.instanceid";
$sqlwhere = "WHERE ctx.contextlevel = ".CONTEXT_COURSECAT;
$sqlorder = "ORDER BY cc.depth ASC, cc.sortorder ASC, cc.id ASC";
$params = array();
$categoriestoload = array();
if ($categoryid == self::LOAD_ALL_CATEGORIES) {
// We are going to load all categories regardless... prepare to fire
// on the database server!
} else if ($categoryid == self::LOAD_ROOT_CATEGORIES) { // can be 0
// We are going to load all of the first level categories (categories without parents)
$sqlwhere .= " AND cc.parent = 0";
} else if (array_key_exists($categoryid, $this->addedcategories)) {
// The category itself has been loaded already so we just need to ensure its subcategories
// have been loaded
$addedcategories = $this->addedcategories;
unset($addedcategories[$categoryid]);
if (count($addedcategories) > 0) {
list($sql, $params) = $DB->get_in_or_equal(array_keys($addedcategories), SQL_PARAMS_NAMED, 'parent', false);
if ($showbasecategories) {
// We need to include categories with parent = 0 as well
$sqlwhere .= " AND (cc.parent = :categoryid OR cc.parent = 0) AND cc.parent {$sql}";
} else {
// All we need is categories that match the parent
$sqlwhere .= " AND cc.parent = :categoryid AND cc.parent {$sql}";
}
}
$params['categoryid'] = $categoryid;
} else {
// This category hasn't been loaded yet so we need to fetch it, work out its category path
// and load this category plus all its parents and subcategories
$category = $DB->get_record('course_categories', array('id' => $categoryid), 'path', MUST_EXIST);
$categoriestoload = explode('/', trim($category->path, '/'));
list($select, $params) = $DB->get_in_or_equal($categoriestoload);
// We are going to use select twice so double the params
$params = array_merge($params, $params);
$basecategorysql = ($showbasecategories)?' OR cc.depth = 1':'';
$sqlwhere .= " AND (cc.id {$select} OR cc.parent {$select}{$basecategorysql})";
}
$categoriesrs = $DB->get_recordset_sql("$sqlselect $sqlwhere $sqlorder", $params);
$categories = array();
foreach ($categoriesrs as $category) {
// Preload the context.. we'll need it when adding the category in order
// to format the category name.
context_helper::preload_from_record($category);
if (array_key_exists($category->id, $this->addedcategories)) {
// Do nothing, its already been added.
} else if ($category->parent == '0') {
// This is a root category lets add it immediately
$this->add_category($category, $this->rootnodes['courses']);
} else if (array_key_exists($category->parent, $this->addedcategories)) {
// This categories parent has already been added we can add this immediately
$this->add_category($category, $this->addedcategories[$category->parent]);
} else {
$categories[] = $category;
}
}
$categoriesrs->close();
// Now we have an array of categories we need to add them to the navigation.
while (!empty($categories)) {
$category = reset($categories);
if (array_key_exists($category->id, $this->addedcategories)) {
// Do nothing
} else if ($category->parent == '0') {
$this->add_category($category, $this->rootnodes['courses']);
} else if (array_key_exists($category->parent, $this->addedcategories)) {
$this->add_category($category, $this->addedcategories[$category->parent]);
} else {
// This category isn't in the navigation and niether is it's parent (yet).
// We need to go through the category path and add all of its components in order.
$path = explode('/', trim($category->path, '/'));
foreach ($path as $catid) {
if (!array_key_exists($catid, $this->addedcategories)) {
// This category isn't in the navigation yet so add it.
$subcategory = $categories[$catid];
if ($subcategory->parent == '0') {
// Yay we have a root category - this likely means we will now be able
// to add categories without problems.
$this->add_category($subcategory, $this->rootnodes['courses']);
} else if (array_key_exists($subcategory->parent, $this->addedcategories)) {
// The parent is in the category (as we'd expect) so add it now.
$this->add_category($subcategory, $this->addedcategories[$subcategory->parent]);
// Remove the category from the categories array.
unset($categories[$catid]);
} else {
// We should never ever arrive here - if we have then there is a bigger
// problem at hand.
throw new coding_exception('Category path order is incorrect and/or there are missing categories');
}
}
}
}
// Remove the category from the categories array now that we know it has been added.
unset($categories[$category->id]);
}
if ($categoryid === self::LOAD_ALL_CATEGORIES) {
$this->allcategoriesloaded = true;
}
// Check if there are any categories to load.
if (count($categoriestoload) > 0) {
$readytoloadcourses = array();
foreach ($categoriestoload as $category) {
if ($this->can_add_more_courses_to_category($category)) {
$readytoloadcourses[] = $category;
}
}
if (count($readytoloadcourses)) {
$this->load_all_courses($readytoloadcourses);
}
}
// Look for all categories which have been loaded
if (!empty($this->addedcategories)) {
$categoryids = array();
foreach ($this->addedcategories as $category) {
if ($this->can_add_more_courses_to_category($category)) {
$categoryids[] = $category->key;
}
}
if ($categoryids) {
list($categoriessql, $params) = $DB->get_in_or_equal($categoryids, SQL_PARAMS_NAMED);
$params['limit'] = (!empty($CFG->navcourselimit))?$CFG->navcourselimit:20;
$sql = "SELECT cc.id, COUNT(c.id) AS coursecount
FROM {course_categories} cc
JOIN {course} c ON c.category = cc.id
WHERE cc.id {$categoriessql}
GROUP BY cc.id
HAVING COUNT(c.id) > :limit";
$excessivecategories = $DB->get_records_sql($sql, $params);
foreach ($categories as &$category) {
if (array_key_exists($category->key, $excessivecategories) && !$this->can_add_more_courses_to_category($category)) {
$url = new moodle_url('/course/index.php', array('categoryid' => $category->key));
$category->add(get_string('viewallcourses'), $url, self::TYPE_SETTING);
}
}
}
}
}
/**
* Adds a structured category to the navigation in the correct order/place
*
* @param stdClass $category category to be added in navigation.
* @param navigation_node $parent parent navigation node
* @param int $nodetype type of node, if category is under MyHome then it's TYPE_MY_CATEGORY
* @return void.
*/
protected function add_category(stdClass $category, navigation_node $parent, $nodetype = self::TYPE_CATEGORY) {
if (array_key_exists($category->id, $this->addedcategories)) {
return;
}
$canview = core_course_category::can_view_category($category);
$url = $canview ? new moodle_url('/course/index.php', array('categoryid' => $category->id)) : null;
$context = context_coursecat::instance($category->id);
$categoryname = $canview ? format_string($category->name, true, array('context' => $context)) :
get_string('categoryhidden');
$categorynode = $parent->add($categoryname, $url, $nodetype, $categoryname, $category->id);
if (!$canview) {
// User does not have required capabilities to view category.
$categorynode->display = false;
} else if (!$category->visible) {
// Category is hidden but user has capability to view hidden categories.
$categorynode->hidden = true;
}
$this->addedcategories[$category->id] = $categorynode;
}
/**
* Loads the given course into the navigation
*
* @param stdClass $course
* @return navigation_node
*/
protected function load_course(stdClass $course) {
global $SITE;
if ($course->id == $SITE->id) {
// This is always loaded during initialisation
return $this->rootnodes['site'];
} else if (array_key_exists($course->id, $this->addedcourses)) {
// The course has already been loaded so return a reference
return $this->addedcourses[$course->id];
} else {
// Add the course
return $this->add_course($course);
}
}
/**
* Loads all of the courses section into the navigation.
*
* This function calls method from current course format, see
* {@link format_base::extend_course_navigation()}
* If course module ($cm) is specified but course format failed to create the node,
* the activity node is created anyway.
*
* By default course formats call the method {@link global_navigation::load_generic_course_sections()}
*
* @param stdClass $course Database record for the course
* @param navigation_node $coursenode The course node within the navigation
* @param null|int $sectionnum If specified load the contents of section with this relative number
* @param null|cm_info $cm If specified make sure that activity node is created (either
* in containg section or by calling load_stealth_activity() )
*/
protected function load_course_sections(stdClass $course, navigation_node $coursenode, $sectionnum = null, $cm = null) {
global $CFG, $SITE;
require_once($CFG->dirroot.'/course/lib.php');
if (isset($cm->sectionnum)) {
$sectionnum = $cm->sectionnum;
}
if ($sectionnum !== null) {
$this->includesectionnum = $sectionnum;
}
course_get_format($course)->extend_course_navigation($this, $coursenode, $sectionnum, $cm);
if (isset($cm->id)) {
$activity = $coursenode->find($cm->id, self::TYPE_ACTIVITY);
if (empty($activity)) {
$activity = $this->load_stealth_activity($coursenode, get_fast_modinfo($course));
}
}
}
/**
* Generates an array of sections and an array of activities for the given course.
*
* This method uses the cache to improve performance and avoid the get_fast_modinfo call
*
* @param stdClass $course
* @return array Array($sections, $activities)
*/
protected function generate_sections_and_activities(stdClass $course) {
global $CFG;
require_once($CFG->dirroot.'/course/lib.php');
$modinfo = get_fast_modinfo($course);
$sections = $modinfo->get_section_info_all();
// For course formats using 'numsections' trim the sections list
$courseformatoptions = course_get_format($course)->get_format_options();
if (isset($courseformatoptions['numsections'])) {
$sections = array_slice($sections, 0, $courseformatoptions['numsections']+1, true);
}
$activities = array();
foreach ($sections as $key => $section) {
// Clone and unset summary to prevent $SESSION bloat (MDL-31802).
$sections[$key] = clone($section);
unset($sections[$key]->summary);
$sections[$key]->hasactivites = false;
if (!array_key_exists($section->section, $modinfo->sections)) {
continue;
}
foreach ($modinfo->sections[$section->section] as $cmid) {
$cm = $modinfo->cms[$cmid];
$activity = new stdClass;
$activity->id = $cm->id;
$activity->course = $course->id;
$activity->section = $section->section;
$activity->name = $cm->name;
$activity->icon = $cm->icon;
$activity->iconcomponent = $cm->iconcomponent;
$activity->hidden = (!$cm->visible);
$activity->modname = $cm->modname;
$activity->nodetype = navigation_node::NODETYPE_LEAF;
$activity->onclick = $cm->onclick;
$url = $cm->url;
if (!$url) {
$activity->url = null;
$activity->display = false;
} else {
$activity->url = $url->out();
$activity->display = $cm->is_visible_on_course_page() ? true : false;
if (self::module_extends_navigation($cm->modname)) {
$activity->nodetype = navigation_node::NODETYPE_BRANCH;
}
}
$activities[$cmid] = $activity;
if ($activity->display) {
$sections[$key]->hasactivites = true;
}
}
}
return array($sections, $activities);
}
/**
* Generically loads the course sections into the course's navigation.
*
* @param stdClass $course
* @param navigation_node $coursenode
* @return array An array of course section nodes
*/
public function load_generic_course_sections(stdClass $course, navigation_node $coursenode) {
global $CFG, $DB, $USER, $SITE;
require_once($CFG->dirroot.'/course/lib.php');
list($sections, $activities) = $this->generate_sections_and_activities($course);
$navigationsections = array();
foreach ($sections as $sectionid => $section) {
$section = clone($section);
if ($course->id == $SITE->id) {
$this->load_section_activities($coursenode, $section->section, $activities);
} else {
if (!$section->uservisible || (!$this->showemptysections &&
!$section->hasactivites && $this->includesectionnum !== $section->section)) {
continue;
}
$sectionname = get_section_name($course, $section);
$url = course_get_url($course, $section->section, array('navigation' => true));
$sectionnode = $coursenode->add($sectionname, $url, navigation_node::TYPE_SECTION,
null, $section->id, new pix_icon('i/section', ''));
$sectionnode->nodetype = navigation_node::NODETYPE_BRANCH;
$sectionnode->hidden = (!$section->visible || !$section->available);
if ($this->includesectionnum !== false && $this->includesectionnum == $section->section) {
$this->load_section_activities($sectionnode, $section->section, $activities);
}
$section->sectionnode = $sectionnode;
$navigationsections[$sectionid] = $section;
}
}
return $navigationsections;
}
/**
* Loads all of the activities for a section into the navigation structure.
*
* @param navigation_node $sectionnode
* @param int $sectionnumber
* @param array $activities An array of activites as returned by {@link global_navigation::generate_sections_and_activities()}
* @param stdClass $course The course object the section and activities relate to.
* @return array Array of activity nodes
*/
protected function load_section_activities(navigation_node $sectionnode, $sectionnumber, array $activities, $course = null) {
global $CFG, $SITE;
// A static counter for JS function naming
static $legacyonclickcounter = 0;
$activitynodes = array();
if (empty($activities)) {
return $activitynodes;
}
if (!is_object($course)) {
$activity = reset($activities);
$courseid = $activity->course;
} else {
$courseid = $course->id;
}
$showactivities = ($courseid != $SITE->id || !empty($CFG->navshowfrontpagemods));
foreach ($activities as $activity) {
if ($activity->section != $sectionnumber) {
continue;
}
if ($activity->icon) {
$icon = new pix_icon($activity->icon, get_string('modulename', $activity->modname), $activity->iconcomponent);
} else {
$icon = new pix_icon('icon', get_string('modulename', $activity->modname), $activity->modname);
}
// Prepare the default name and url for the node
$activityname = format_string($activity->name, true, array('context' => context_module::instance($activity->id)));
$action = new moodle_url($activity->url);
// Check if the onclick property is set (puke!)
if (!empty($activity->onclick)) {
// Increment the counter so that we have a unique number.
$legacyonclickcounter++;
// Generate the function name we will use
$functionname = 'legacy_activity_onclick_handler_'.$legacyonclickcounter;
$propogrationhandler = '';
// Check if we need to cancel propogation. Remember inline onclick
// events would return false if they wanted to prevent propogation and the
// default action.
if (strpos($activity->onclick, 'return false')) {
$propogrationhandler = 'e.halt();';
}
// Decode the onclick - it has already been encoded for display (puke)
$onclick = htmlspecialchars_decode($activity->onclick, ENT_QUOTES);
// Build the JS function the click event will call
$jscode = "function {$functionname}(e) { $propogrationhandler $onclick }";
$this->page->requires->js_amd_inline($jscode);
// Override the default url with the new action link
$action = new action_link($action, $activityname, new component_action('click', $functionname));
}
$activitynode = $sectionnode->add($activityname, $action, navigation_node::TYPE_ACTIVITY, null, $activity->id, $icon);
$activitynode->title(get_string('modulename', $activity->modname));
$activitynode->hidden = $activity->hidden;
$activitynode->display = $showactivities && $activity->display;
$activitynode->nodetype = $activity->nodetype;
$activitynodes[$activity->id] = $activitynode;
}
return $activitynodes;
}
/**
* Loads a stealth module from unavailable section
* @param navigation_node $coursenode
* @param stdClass $modinfo
* @return navigation_node or null if not accessible
*/
protected function load_stealth_activity(navigation_node $coursenode, $modinfo) {
if (empty($modinfo->cms[$this->page->cm->id])) {
return null;
}
$cm = $modinfo->cms[$this->page->cm->id];
if ($cm->icon) {
$icon = new pix_icon($cm->icon, get_string('modulename', $cm->modname), $cm->iconcomponent);
} else {
$icon = new pix_icon('icon', get_string('modulename', $cm->modname), $cm->modname);
}
$url = $cm->url;
$activitynode = $coursenode->add(format_string($cm->name), $url, navigation_node::TYPE_ACTIVITY, null, $cm->id, $icon);
$activitynode->title(get_string('modulename', $cm->modname));
$activitynode->hidden = (!$cm->visible);
if (!$cm->is_visible_on_course_page()) {
// Do not show any error here, let the page handle exception that activity is not visible for the current user.
// Also there may be no exception at all in case when teacher is logged in as student.
$activitynode->display = false;
} else if (!$url) {
// Don't show activities that don't have links!
$activitynode->display = false;
} else if (self::module_extends_navigation($cm->modname)) {
$activitynode->nodetype = navigation_node::NODETYPE_BRANCH;
}
return $activitynode;
}
/**
* Loads the navigation structure for the given activity into the activities node.
*
* This method utilises a callback within the modules lib.php file to load the
* content specific to activity given.
*
* The callback is a method: {modulename}_extend_navigation()
* Examples:
* * {@link forum_extend_navigation()}
* * {@link workshop_extend_navigation()}
*
* @param cm_info|stdClass $cm
* @param stdClass $course
* @param navigation_node $activity
* @return bool
*/
protected function load_activity($cm, stdClass $course, navigation_node $activity) {
global $CFG, $DB;
// make sure we have a $cm from get_fast_modinfo as this contains activity access details
if (!($cm instanceof cm_info)) {
$modinfo = get_fast_modinfo($course);
$cm = $modinfo->get_cm($cm->id);
}
$activity->nodetype = navigation_node::NODETYPE_LEAF;
$activity->make_active();
$file = $CFG->dirroot.'/mod/'.$cm->modname.'/lib.php';
$function = $cm->modname.'_extend_navigation';
if (file_exists($file)) {
require_once($file);
if (function_exists($function)) {
$activtyrecord = $DB->get_record($cm->modname, array('id' => $cm->instance), '*', MUST_EXIST);
$function($activity, $course, $activtyrecord, $cm);
}
}
// Allow the active advanced grading method plugin to append module navigation
$featuresfunc = $cm->modname.'_supports';
if (function_exists($featuresfunc) && $featuresfunc(FEATURE_ADVANCED_GRADING)) {
require_once($CFG->dirroot.'/grade/grading/lib.php');
$gradingman = get_grading_manager($cm->context, 'mod_'.$cm->modname);
$gradingman->extend_navigation($this, $activity);
}
return $activity->has_children();
}
/**
* Loads user specific information into the navigation in the appropriate place.
*
* If no user is provided the current user is assumed.
*
* @param stdClass $user
* @param bool $forceforcontext probably force something to be loaded somewhere (ask SamH if not sure what this means)
* @return bool
*/
protected function load_for_user($user=null, $forceforcontext=false) {
global $DB, $CFG, $USER, $SITE;
require_once($CFG->dirroot . '/course/lib.php');
if ($user === null) {
// We can't require login here but if the user isn't logged in we don't
// want to show anything
if (!isloggedin() || isguestuser()) {
return false;
}
$user = $USER;
} else if (!is_object($user)) {
// If the user is not an object then get them from the database
$select = context_helper::get_preload_record_columns_sql('ctx');
$sql = "SELECT u.*, $select
FROM {user} u
JOIN {context} ctx ON u.id = ctx.instanceid
WHERE u.id = :userid AND
ctx.contextlevel = :contextlevel";
$user = $DB->get_record_sql($sql, array('userid' => (int)$user, 'contextlevel' => CONTEXT_USER), MUST_EXIST);
context_helper::preload_from_record($user);
}
$iscurrentuser = ($user->id == $USER->id);
$usercontext = context_user::instance($user->id);
// Get the course set against the page, by default this will be the site
$course = $this->page->course;
$baseargs = array('id'=>$user->id);
if ($course->id != $SITE->id && (!$iscurrentuser || $forceforcontext)) {
$coursenode = $this->add_course($course, false, self::COURSE_CURRENT);
$baseargs['course'] = $course->id;
$coursecontext = context_course::instance($course->id);
$issitecourse = false;
} else {
// Load all categories and get the context for the system
$coursecontext = context_system::instance();
$issitecourse = true;
}
// Create a node to add user information under.
$usersnode = null;
if (!$issitecourse) {
// Not the current user so add it to the participants node for the current course.
$usersnode = $coursenode->get('participants', navigation_node::TYPE_CONTAINER);
$userviewurl = new moodle_url('/user/view.php', $baseargs);
} else if ($USER->id != $user->id) {
// This is the site so add a users node to the root branch.
$usersnode = $this->rootnodes['users'];
if (course_can_view_participants($coursecontext)) {
$usersnode->action = new moodle_url('/user/index.php', array('id' => $course->id));
}
$userviewurl = new moodle_url('/user/profile.php', $baseargs);
}
if (!$usersnode) {
// We should NEVER get here, if the course hasn't been populated
// with a participants node then the navigaiton either wasn't generated
// for it (you are missing a require_login or set_context call) or
// you don't have access.... in the interests of no leaking informatin
// we simply quit...
return false;
}
// Add a branch for the current user.
// Only reveal user details if $user is the current user, or a user to which the current user has access.
$viewprofile = true;
if (!$iscurrentuser) {
require_once($CFG->dirroot . '/user/lib.php');
if ($this->page->context->contextlevel == CONTEXT_USER && !has_capability('moodle/user:viewdetails', $usercontext) ) {
$viewprofile = false;
} else if ($this->page->context->contextlevel != CONTEXT_USER && !user_can_view_profile($user, $course, $usercontext)) {
$viewprofile = false;
}
if (!$viewprofile) {
$viewprofile = user_can_view_profile($user, null, $usercontext);
}
}
// Now, conditionally add the user node.
if ($viewprofile) {
$canseefullname = has_capability('moodle/site:viewfullnames', $coursecontext);
$usernode = $usersnode->add(fullname($user, $canseefullname), $userviewurl, self::TYPE_USER, null, 'user' . $user->id);
} else {
$usernode = $usersnode->add(get_string('user'));
}
if ($this->page->context->contextlevel == CONTEXT_USER && $user->id == $this->page->context->instanceid) {
$usernode->make_active();
}
// Add user information to the participants or user node.
if ($issitecourse) {
// If the user is the current user or has permission to view the details of the requested
// user than add a view profile link.
if ($iscurrentuser || has_capability('moodle/user:viewdetails', $coursecontext) ||
has_capability('moodle/user:viewdetails', $usercontext)) {
if ($issitecourse || ($iscurrentuser && !$forceforcontext)) {
$usernode->add(get_string('viewprofile'), new moodle_url('/user/profile.php', $baseargs));
} else {
$usernode->add(get_string('viewprofile'), new moodle_url('/user/view.php', $baseargs));
}
}
if (!empty($CFG->navadduserpostslinks)) {
// Add nodes for forum posts and discussions if the user can view either or both
// There are no capability checks here as the content of the page is based
// purely on the forums the current user has access too.
$forumtab = $usernode->add(get_string('forumposts', 'forum'));
$forumtab->add(get_string('posts', 'forum'), new moodle_url('/mod/forum/user.php', $baseargs));
$forumtab->add(get_string('discussions', 'forum'), new moodle_url('/mod/forum/user.php',
array_merge($baseargs, array('mode' => 'discussions'))));
}
// Add blog nodes.
if (!empty($CFG->enableblogs)) {
if (!$this->cache->cached('userblogoptions'.$user->id)) {
require_once($CFG->dirroot.'/blog/lib.php');
// Get all options for the user.
$options = blog_get_options_for_user($user);
$this->cache->set('userblogoptions'.$user->id, $options);
} else {
$options = $this->cache->{'userblogoptions'.$user->id};
}
if (count($options) > 0) {
$blogs = $usernode->add(get_string('blogs', 'blog'), null, navigation_node::TYPE_CONTAINER);
foreach ($options as $type => $option) {
if ($type == "rss") {
$blogs->add($option['string'], $option['link'], settings_navigation::TYPE_SETTING, null, null,
new pix_icon('i/rss', ''));
} else {
$blogs->add($option['string'], $option['link']);
}
}
}
}
// Add the messages link.
// It is context based so can appear in the user's profile and in course participants information.
if (!empty($CFG->messaging)) {
$messageargs = array('user1' => $USER->id);
if ($USER->id != $user->id) {
$messageargs['user2'] = $user->id;
}
$url = new moodle_url('/message/index.php', $messageargs);
$usernode->add(get_string('messages', 'message'), $url, self::TYPE_SETTING, null, 'messages');
}
// Add the "My private files" link.
// This link doesn't have a unique display for course context so only display it under the user's profile.
if ($issitecourse && $iscurrentuser && has_capability('moodle/user:manageownfiles', $usercontext)) {
$url = new moodle_url('/user/files.php');
$usernode->add(get_string('privatefiles'), $url, self::TYPE_SETTING, null, 'privatefiles');
}
// Add a node to view the users notes if permitted.
if (!empty($CFG->enablenotes) &&
has_any_capability(array('moodle/notes:manage', 'moodle/notes:view'), $coursecontext)) {
$url = new moodle_url('/notes/index.php', array('user' => $user->id));
if ($coursecontext->instanceid != SITEID) {
$url->param('course', $coursecontext->instanceid);
}
$usernode->add(get_string('notes', 'notes'), $url);
}
// Show the grades node.
if (($issitecourse && $iscurrentuser) || has_capability('moodle/user:viewdetails', $usercontext)) {
require_once($CFG->dirroot . '/user/lib.php');
// Set the grades node to link to the "Grades" page.
if ($course->id == SITEID) {
$url = user_mygrades_url($user->id, $course->id);
} else { // Otherwise we are in a course and should redirect to the user grade report (Activity report version).
$url = new moodle_url('/course/user.php', array('mode' => 'grade', 'id' => $course->id, 'user' => $user->id));
}
if ($USER->id != $user->id) {
$usernode->add(get_string('grades', 'grades'), $url, self::TYPE_SETTING, null, 'usergrades');
} else {
$usernode->add(get_string('grades', 'grades'), $url);
}
}
// If the user is the current user add the repositories for the current user.
$hiddenfields = array_flip(explode(',', $CFG->hiddenuserfields));
if (!$iscurrentuser &&
$course->id == $SITE->id &&
has_capability('moodle/user:viewdetails', $usercontext) &&
(!in_array('mycourses', $hiddenfields) || has_capability('moodle/user:viewhiddendetails', $coursecontext))) {
// Add view grade report is permitted.
$reports = core_component::get_plugin_list('gradereport');
arsort($reports); // User is last, we want to test it first.
$userscourses = enrol_get_users_courses($user->id, false, '*');
$userscoursesnode = $usernode->add(get_string('courses'));
$count = 0;
foreach ($userscourses as $usercourse) {
if ($count === (int)$CFG->navcourselimit) {
$url = new moodle_url('/user/profile.php', array('id' => $user->id, 'showallcourses' => 1));
$userscoursesnode->add(get_string('showallcourses'), $url);
break;
}
$count++;
$usercoursecontext = context_course::instance($usercourse->id);
$usercourseshortname = format_string($usercourse->shortname, true, array('context' => $usercoursecontext));
$usercoursenode = $userscoursesnode->add($usercourseshortname, new moodle_url('/user/view.php',
array('id' => $user->id, 'course' => $usercourse->id)), self::TYPE_CONTAINER);
$gradeavailable = has_capability('moodle/grade:view', $usercoursecontext);
if (!$gradeavailable && !empty($usercourse->showgrades) && is_array($reports) && !empty($reports)) {
foreach ($reports as $plugin => $plugindir) {
if (has_capability('gradereport/'.$plugin.':view', $usercoursecontext)) {
// Stop when the first visible plugin is found.
$gradeavailable = true;
break;
}
}
}
if ($gradeavailable) {
$url = new moodle_url('/grade/report/index.php', array('id' => $usercourse->id));
$usercoursenode->add(get_string('grades'), $url, self::TYPE_SETTING, null, null,
new pix_icon('i/grades', ''));
}
// Add a node to view the users notes if permitted.
if (!empty($CFG->enablenotes) &&
has_any_capability(array('moodle/notes:manage', 'moodle/notes:view'), $usercoursecontext)) {
$url = new moodle_url('/notes/index.php', array('user' => $user->id, 'course' => $usercourse->id));
$usercoursenode->add(get_string('notes', 'notes'), $url, self::TYPE_SETTING);
}
if (can_access_course($usercourse, $user->id, '', true)) {
$usercoursenode->add(get_string('entercourse'), new moodle_url('/course/view.php',
array('id' => $usercourse->id)), self::TYPE_SETTING, null, null, new pix_icon('i/course', ''));
}
$reporttab = $usercoursenode->add(get_string('activityreports'));
$reportfunctions = get_plugin_list_with_function('report', 'extend_navigation_user', 'lib.php');
foreach ($reportfunctions as $reportfunction) {
$reportfunction($reporttab, $user, $usercourse);
}
$reporttab->trim_if_empty();
}
}
// Let plugins hook into user navigation.
$pluginsfunction = get_plugins_with_function('extend_navigation_user', 'lib.php');
foreach ($pluginsfunction as $plugintype => $plugins) {
if ($plugintype != 'report') {
foreach ($plugins as $pluginfunction) {
$pluginfunction($usernode, $user, $usercontext, $course, $coursecontext);
}
}
}
}
return true;
}
/**
* This method simply checks to see if a given module can extend the navigation.
*
* @todo (MDL-25290) A shared caching solution should be used to save details on what extends navigation.
*
* @param string $modname
* @return bool
*/
public static function module_extends_navigation($modname) {
global $CFG;
static $extendingmodules = array();
if (!array_key_exists($modname, $extendingmodules)) {
$extendingmodules[$modname] = false;
$file = $CFG->dirroot.'/mod/'.$modname.'/lib.php';
if (file_exists($file)) {
$function = $modname.'_extend_navigation';
require_once($file);
$extendingmodules[$modname] = (function_exists($function));
}
}
return $extendingmodules[$modname];
}
/**
* Extends the navigation for the given user.
*
* @param stdClass $user A user from the database
*/
public function extend_for_user($user) {
$this->extendforuser[] = $user;
}
/**
* Returns all of the users the navigation is being extended for
*
* @return array An array of extending users.
*/
public function get_extending_users() {
return $this->extendforuser;
}
/**
* Adds the given course to the navigation structure.
*
* @param stdClass $course
* @param bool $forcegeneric
* @param bool $ismycourse
* @return navigation_node
*/
public function add_course(stdClass $course, $forcegeneric = false, $coursetype = self::COURSE_OTHER) {
global $CFG, $SITE;
// We found the course... we can return it now :)
if (!$forcegeneric && array_key_exists($course->id, $this->addedcourses)) {
return $this->addedcourses[$course->id];
}
$coursecontext = context_course::instance($course->id);
if ($coursetype != self::COURSE_MY && $coursetype != self::COURSE_CURRENT && $course->id != $SITE->id) {
if (is_role_switched($course->id)) {
// user has to be able to access course in order to switch, let's skip the visibility test here
} else if (!core_course_category::can_view_course_info($course)) {
return false;
}
}
$issite = ($course->id == $SITE->id);
$shortname = format_string($course->shortname, true, array('context' => $coursecontext));
$fullname = format_string($course->fullname, true, array('context' => $coursecontext));
// This is the name that will be shown for the course.
$coursename = empty($CFG->navshowfullcoursenames) ? $shortname : $fullname;
if ($coursetype == self::COURSE_CURRENT) {
if ($coursenode = $this->rootnodes['mycourses']->find($course->id, self::TYPE_COURSE)) {
return $coursenode;
} else {
$coursetype = self::COURSE_OTHER;
}
}
// Can the user expand the course to see its content.
$canexpandcourse = true;
if ($issite) {
$parent = $this;
$url = null;
if (empty($CFG->usesitenameforsitepages)) {
$coursename = get_string('sitepages');
}
} else if ($coursetype == self::COURSE_CURRENT) {
$parent = $this->rootnodes['currentcourse'];
$url = new moodle_url('/course/view.php', array('id'=>$course->id));
$canexpandcourse = $this->can_expand_course($course);
} else if ($coursetype == self::COURSE_MY && !$forcegeneric) {
if (!empty($CFG->navshowmycoursecategories) && ($parent = $this->rootnodes['mycourses']->find($course->category, self::TYPE_MY_CATEGORY))) {
// Nothing to do here the above statement set $parent to the category within mycourses.
} else {
$parent = $this->rootnodes['mycourses'];
}
$url = new moodle_url('/course/view.php', array('id'=>$course->id));
} else {
$parent = $this->rootnodes['courses'];
$url = new moodle_url('/course/view.php', array('id'=>$course->id));
// They can only expand the course if they can access it.
$canexpandcourse = $this->can_expand_course($course);
if (!empty($course->category) && $this->show_categories($coursetype == self::COURSE_MY)) {
if (!$this->is_category_fully_loaded($course->category)) {
// We need to load the category structure for this course
$this->load_all_categories($course->category, false);
}
if (array_key_exists($course->category, $this->addedcategories)) {
$parent = $this->addedcategories[$course->category];
// This could lead to the course being created so we should check whether it is the case again
if (!$forcegeneric && array_key_exists($course->id, $this->addedcourses)) {
return $this->addedcourses[$course->id];
}
}
}
}
$coursenode = $parent->add($coursename, $url, self::TYPE_COURSE, $shortname, $course->id, new pix_icon('i/course', ''));
$coursenode->showinflatnavigation = $coursetype == self::COURSE_MY;
$coursenode->hidden = (!$course->visible);
$coursenode->title(format_string($course->fullname, true, array('context' => $coursecontext, 'escape' => false)));
if ($canexpandcourse) {
// This course can be expanded by the user, make it a branch to make the system aware that its expandable by ajax.
$coursenode->nodetype = self::NODETYPE_BRANCH;
$coursenode->isexpandable = true;
} else {
$coursenode->nodetype = self::NODETYPE_LEAF;
$coursenode->isexpandable = false;
}
if (!$forcegeneric) {
$this->addedcourses[$course->id] = $coursenode;
}
return $coursenode;
}
/**
* Returns a cache instance to use for the expand course cache.
* @return cache_session
*/
protected function get_expand_course_cache() {
if ($this->cacheexpandcourse === null) {
$this->cacheexpandcourse = cache::make('core', 'navigation_expandcourse');
}
return $this->cacheexpandcourse;
}
/**
* Checks if a user can expand a course in the navigation.
*
* We use a cache here because in order to be accurate we need to call can_access_course which is a costly function.
* Because this functionality is basic + non-essential and because we lack good event triggering this cache
* permits stale data.
* In the situation the user is granted access to a course after we've initialised this session cache the cache
* will be stale.
* It is brought up to date in only one of two ways.
* 1. The user logs out and in again.
* 2. The user browses to the course they've just being given access to.
*
* Really all this controls is whether the node is shown as expandable or not. It is uber un-important.
*
* @param stdClass $course
* @return bool
*/
protected function can_expand_course($course) {
$cache = $this->get_expand_course_cache();
$canexpand = $cache->get($course->id);
if ($canexpand === false) {
$canexpand = isloggedin() && can_access_course($course, null, '', true);
$canexpand = (int)$canexpand;
$cache->set($course->id, $canexpand);
}
return ($canexpand === 1);
}
/**
* Returns true if the category has already been loaded as have any child categories
*
* @param int $categoryid
* @return bool
*/
protected function is_category_fully_loaded($categoryid) {
return (array_key_exists($categoryid, $this->addedcategories) && ($this->allcategoriesloaded || $this->addedcategories[$categoryid]->children->count() > 0));
}
/**
* Adds essential course nodes to the navigation for the given course.
*
* This method adds nodes such as reports, blogs and participants
*
* @param navigation_node $coursenode
* @param stdClass $course
* @return bool returns true on successful addition of a node.
*/
public function add_course_essentials($coursenode, stdClass $course) {
global $CFG, $SITE;
require_once($CFG->dirroot . '/course/lib.php');
if ($course->id == $SITE->id) {
return $this->add_front_page_course_essentials($coursenode, $course);
}
if ($coursenode == false || !($coursenode instanceof navigation_node) || $coursenode->get('participants', navigation_node::TYPE_CONTAINER)) {
return true;
}
$navoptions = course_get_user_navigation_options($this->page->context, $course);
//Participants
if ($navoptions->participants) {
$participants = $coursenode->add(get_string('participants'), new moodle_url('/user/index.php?id='.$course->id),
self::TYPE_CONTAINER, get_string('participants'), 'participants', new pix_icon('i/users', ''));
if ($navoptions->blogs) {
$blogsurls = new moodle_url('/blog/index.php');
if ($currentgroup = groups_get_course_group($course, true)) {
$blogsurls->param('groupid', $currentgroup);
} else {
$blogsurls->param('courseid', $course->id);
}
$participants->add(get_string('blogscourse', 'blog'), $blogsurls->out(), self::TYPE_SETTING, null, 'courseblogs');
}
if ($navoptions->notes) {
$participants->add(get_string('notes', 'notes'), new moodle_url('/notes/index.php', array('filtertype' => 'course', 'filterselect' => $course->id)), self::TYPE_SETTING, null, 'currentcoursenotes');
}
} else if (count($this->extendforuser) > 0 || $this->page->course->id == $course->id) {
$participants = $coursenode->add(get_string('participants'), null, self::TYPE_CONTAINER, get_string('participants'), 'participants');
}
// Badges.
if ($navoptions->badges) {
$url = new moodle_url('/badges/view.php', array('type' => 2, 'id' => $course->id));
$coursenode->add(get_string('coursebadges', 'badges'), $url,
navigation_node::TYPE_SETTING, null, 'badgesview',
new pix_icon('i/badge', get_string('coursebadges', 'badges')));
}
// Check access to the course and competencies page.
if ($navoptions->competencies) {
// Just a link to course competency.
$title = get_string('competencies', 'core_competency');
$path = new moodle_url("/admin/tool/lp/coursecompetencies.php", array('courseid' => $course->id));
$coursenode->add($title, $path, navigation_node::TYPE_SETTING, null, 'competencies',
new pix_icon('i/competencies', ''));
}
if ($navoptions->grades) {
$url = new moodle_url('/grade/report/index.php', array('id'=>$course->id));
$gradenode = $coursenode->add(get_string('grades'), $url, self::TYPE_SETTING, null,
'grades', new pix_icon('i/grades', ''));
// If the page type matches the grade part, then make the nav drawer grade node (incl. all sub pages) active.
if ($this->page->context->contextlevel < CONTEXT_MODULE && strpos($this->page->pagetype, 'grade-') === 0) {
$gradenode->make_active();
}
}
return true;
}
/**
* This generates the structure of the course that won't be generated when
* the modules and sections are added.
*
* Things such as the reports branch, the participants branch, blogs... get
* added to the course node by this method.
*
* @param navigation_node $coursenode
* @param stdClass $course
* @return bool True for successfull generation
*/
public function add_front_page_course_essentials(navigation_node $coursenode, stdClass $course) {
global $CFG, $USER, $COURSE, $SITE;
require_once($CFG->dirroot . '/course/lib.php');
if ($coursenode == false || $coursenode->get('frontpageloaded', navigation_node::TYPE_CUSTOM)) {
return true;
}
$sitecontext = context_system::instance();
$navoptions = course_get_user_navigation_options($sitecontext, $course);
// Hidden node that we use to determine if the front page navigation is loaded.
// This required as there are not other guaranteed nodes that may be loaded.
$coursenode->add('frontpageloaded', null, self::TYPE_CUSTOM, null, 'frontpageloaded')->display = false;
// Participants.
if ($navoptions->participants) {
$coursenode->add(get_string('participants'), new moodle_url('/user/index.php?id='.$course->id), self::TYPE_CUSTOM, get_string('participants'), 'participants');
}
// Blogs.
if ($navoptions->blogs) {
$blogsurls = new moodle_url('/blog/index.php');
$coursenode->add(get_string('blogssite', 'blog'), $blogsurls->out(), self::TYPE_SYSTEM, null, 'siteblog');
}
$filterselect = 0;
// Badges.
if ($navoptions->badges) {
$url = new moodle_url($CFG->wwwroot . '/badges/view.php', array('type' => 1));
$coursenode->add(get_string('sitebadges', 'badges'), $url, navigation_node::TYPE_CUSTOM);
}
// Notes.
if ($navoptions->notes) {
$coursenode->add(get_string('notes', 'notes'), new moodle_url('/notes/index.php',
array('filtertype' => 'course', 'filterselect' => $filterselect)), self::TYPE_SETTING, null, 'notes');
}
// Tags
if ($navoptions->tags) {
$node = $coursenode->add(get_string('tags', 'tag'), new moodle_url('/tag/search.php'),
self::TYPE_SETTING, null, 'tags');
}
// Search.
if ($navoptions->search) {
$node = $coursenode->add(get_string('search', 'search'), new moodle_url('/search/index.php'),
self::TYPE_SETTING, null, 'search');
}
if ($navoptions->calendar) {
$courseid = $COURSE->id;
$params = array('view' => 'month');
if ($courseid != $SITE->id) {
$params['course'] = $courseid;
}
// Calendar
$calendarurl = new moodle_url('/calendar/view.php', $params);
$node = $coursenode->add(get_string('calendar', 'calendar'), $calendarurl,
self::TYPE_CUSTOM, null, 'calendar', new pix_icon('i/calendar', ''));
$node->showinflatnavigation = true;
}
if (isloggedin()) {
$usercontext = context_user::instance($USER->id);
if (has_capability('moodle/user:manageownfiles', $usercontext)) {
$url = new moodle_url('/user/files.php');
$node = $coursenode->add(get_string('privatefiles'), $url,
self::TYPE_SETTING, null, 'privatefiles', new pix_icon('i/privatefiles', ''));
$node->display = false;
$node->showinflatnavigation = true;
}
}
return true;
}
/**
* Clears the navigation cache
*/
public function clear_cache() {
$this->cache->clear();
}
/**
* Sets an expansion limit for the navigation
*
* The expansion limit is used to prevent the display of content that has a type
* greater than the provided $type.
*
* Can be used to ensure things such as activities or activity content don't get
* shown on the navigation.
* They are still generated in order to ensure the navbar still makes sense.
*
* @param int $type One of navigation_node::TYPE_*
* @return bool true when complete.
*/
public function set_expansion_limit($type) {
global $SITE;
$nodes = $this->find_all_of_type($type);
// We only want to hide specific types of nodes.
// Only nodes that represent "structure" in the navigation tree should be hidden.
// If we hide all nodes then we risk hiding vital information.
$typestohide = array(
self::TYPE_CATEGORY,
self::TYPE_COURSE,
self::TYPE_SECTION,
self::TYPE_ACTIVITY
);
foreach ($nodes as $node) {
// We need to generate the full site node
if ($type == self::TYPE_COURSE && $node->key == $SITE->id) {
continue;
}
foreach ($node->children as $child) {
$child->hide($typestohide);
}
}
return true;
}
/**
* Attempts to get the navigation with the given key from this nodes children.
*
* This function only looks at this nodes children, it does NOT look recursivily.
* If the node can't be found then false is returned.
*
* If you need to search recursivily then use the {@link global_navigation::find()} method.
*
* Note: If you are trying to set the active node {@link navigation_node::override_active_url()}
* may be of more use to you.
*
* @param string|int $key The key of the node you wish to receive.
* @param int $type One of navigation_node::TYPE_*
* @return navigation_node|false
*/
public function get($key, $type = null) {
if (!$this->initialised) {
$this->initialise();
}
return parent::get($key, $type);
}
/**
* Searches this nodes children and their children to find a navigation node
* with the matching key and type.
*
* This method is recursive and searches children so until either a node is
* found or there are no more nodes to search.
*
* If you know that the node being searched for is a child of this node
* then use the {@link global_navigation::get()} method instead.
*
* Note: If you are trying to set the active node {@link navigation_node::override_active_url()}
* may be of more use to you.
*
* @param string|int $key The key of the node you wish to receive.
* @param int $type One of navigation_node::TYPE_*
* @return navigation_node|false
*/
public function find($key, $type) {
if (!$this->initialised) {
$this->initialise();
}
if ($type == self::TYPE_ROOTNODE && array_key_exists($key, $this->rootnodes)) {
return $this->rootnodes[$key];
}
return parent::find($key, $type);
}
/**
* They've expanded the 'my courses' branch.
*/
protected function load_courses_enrolled() {
global $CFG;
$limit = (int) $CFG->navcourselimit;
$courses = enrol_get_my_courses('*');
$flatnavcourses = [];
// Go through the courses and see which ones we want to display in the flatnav.
foreach ($courses as $course) {
$classify = course_classify_for_timeline($course);
if ($classify == COURSE_TIMELINE_INPROGRESS) {
$flatnavcourses[$course->id] = $course;
}
}
// Get the number of courses that can be displayed in the nav block and in the flatnav.
$numtotalcourses = count($courses);
$numtotalflatnavcourses = count($flatnavcourses);
// Reduce the size of the arrays to abide by the 'navcourselimit' setting.
$courses = array_slice($courses, 0, $limit, true);
$flatnavcourses = array_slice($flatnavcourses, 0, $limit, true);
// Get the number of courses we are going to show for each.
$numshowncourses = count($courses);
$numshownflatnavcourses = count($flatnavcourses);
if ($numshowncourses && $this->show_my_categories()) {
// Generate an array containing unique values of all the courses' categories.
$categoryids = array();
foreach ($courses as $course) {
if (in_array($course->category, $categoryids)) {
continue;
}
$categoryids[] = $course->category;
}
// Array of category IDs that include the categories of the user's courses and the related course categories.
$fullpathcategoryids = [];
// Get the course categories for the enrolled courses' category IDs.
$mycoursecategories = core_course_category::get_many($categoryids);
// Loop over each of these categories and build the category tree using each category's path.
foreach ($mycoursecategories as $mycoursecat) {
$pathcategoryids = explode('/', $mycoursecat->path);
// First element of the exploded path is empty since paths begin with '/'.
array_shift($pathcategoryids);
// Merge the exploded category IDs into the full list of category IDs that we will fetch.
$fullpathcategoryids = array_merge($fullpathcategoryids, $pathcategoryids);
}
// Fetch all of the categories related to the user's courses.
$pathcategories = core_course_category::get_many($fullpathcategoryids);
// Loop over each of these categories and build the category tree.
foreach ($pathcategories as $coursecat) {
// No need to process categories that have already been added.
if (isset($this->addedcategories[$coursecat->id])) {
continue;
}
// Skip categories that are not visible.
if (!$coursecat->is_uservisible()) {
continue;
}
// Get this course category's parent node.
$parent = null;
if ($coursecat->parent && isset($this->addedcategories[$coursecat->parent])) {
$parent = $this->addedcategories[$coursecat->parent];
}
if (!$parent) {
// If it has no parent, then it should be right under the My courses node.
$parent = $this->rootnodes['mycourses'];
}
// Build the category object based from the coursecat object.
$mycategory = new stdClass();
$mycategory->id = $coursecat->id;
$mycategory->name = $coursecat->name;
$mycategory->visible = $coursecat->visible;
// Add this category to the nav tree.
$this->add_category($mycategory, $parent, self::TYPE_MY_CATEGORY);
}
}
// Go through each course now and add it to the nav block, and the flatnav if applicable.
foreach ($courses as $course) {
$node = $this->add_course($course, false, self::COURSE_MY);
if ($node) {
$node->showinflatnavigation = false;
// Check if we should also add this to the flat nav as well.
if (isset($flatnavcourses[$course->id])) {
$node->showinflatnavigation = true;
}
}
}
// Go through each course in the flatnav now.
foreach ($flatnavcourses as $course) {
// Check if we haven't already added it.
if (!isset($courses[$course->id])) {
// Ok, add it to the flatnav only.
$node = $this->add_course($course, false, self::COURSE_MY);
$node->display = false;
$node->showinflatnavigation = true;
}
}
$showmorelinkinnav = $numtotalcourses > $numshowncourses;
$showmorelinkinflatnav = $numtotalflatnavcourses > $numshownflatnavcourses;
// Show a link to the course page if there are more courses the user is enrolled in.
if ($showmorelinkinnav || $showmorelinkinflatnav) {
// Adding hash to URL so the link is not highlighted in the navigation when clicked.
$url = new moodle_url('/my/');
$parent = $this->rootnodes['mycourses'];
$coursenode = $parent->add(get_string('morenavigationlinks'), $url, self::TYPE_CUSTOM, null, self::COURSE_INDEX_PAGE);
if ($showmorelinkinnav) {
$coursenode->display = true;
}
if ($showmorelinkinflatnav) {
$coursenode->showinflatnavigation = true;
}
}
}
}
/**
* The global navigation class used especially for AJAX requests.
*
* The primary methods that are used in the global navigation class have been overriden
* to ensure that only the relevant branch is generated at the root of the tree.
* This can be done because AJAX is only used when the backwards structure for the
* requested branch exists.
* This has been done only because it shortens the amounts of information that is generated
* which of course will speed up the response time.. because no one likes laggy AJAX.
*
* @package core
* @category navigation
* @copyright 2009 Sam Hemelryk
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class global_navigation_for_ajax extends global_navigation {
/** @var int used for determining what type of navigation_node::TYPE_* is being used */
protected $branchtype;
/** @var int the instance id */
protected $instanceid;
/** @var array Holds an array of expandable nodes */
protected $expandable = array();
/**
* Constructs the navigation for use in an AJAX request
*
* @param moodle_page $page moodle_page object
* @param int $branchtype
* @param int $id
*/
public function __construct($page, $branchtype, $id) {
$this->page = $page;
$this->cache = new navigation_cache(NAVIGATION_CACHE_NAME);
$this->children = new navigation_node_collection();
$this->branchtype = $branchtype;
$this->instanceid = $id;
$this->initialise();
}
/**
* Initialise the navigation given the type and id for the branch to expand.
*
* @return array An array of the expandable nodes
*/
public function initialise() {
global $DB, $SITE;
if ($this->initialised || during_initial_install()) {
return $this->expandable;
}
$this->initialised = true;
$this->rootnodes = array();
$this->rootnodes['site'] = $this->add_course($SITE);
$this->rootnodes['mycourses'] = $this->add(get_string('mycourses'), new moodle_url('/my'), self::TYPE_ROOTNODE, null, 'mycourses');
$this->rootnodes['courses'] = $this->add(get_string('courses'), null, self::TYPE_ROOTNODE, null, 'courses');
// The courses branch is always displayed, and is always expandable (although may be empty).
// This mimicks what is done during {@link global_navigation::initialise()}.
$this->rootnodes['courses']->isexpandable = true;
// Branchtype will be one of navigation_node::TYPE_*
switch ($this->branchtype) {
case 0:
if ($this->instanceid === 'mycourses') {
$this->load_courses_enrolled();
} else if ($this->instanceid === 'courses') {
$this->load_courses_other();
}
break;
case self::TYPE_CATEGORY :
$this->load_category($this->instanceid);
break;
case self::TYPE_MY_CATEGORY :
$this->load_category($this->instanceid, self::TYPE_MY_CATEGORY);
break;
case self::TYPE_COURSE :
$course = $DB->get_record('course', array('id' => $this->instanceid), '*', MUST_EXIST);
if (!can_access_course($course, null, '', true)) {
// Thats OK all courses are expandable by default. We don't need to actually expand it we can just
// add the course node and break. This leads to an empty node.
$this->add_course($course);
break;
}
require_course_login($course, true, null, false, true);
$this->page->set_context(context_course::instance($course->id));
$coursenode = $this->add_course($course, false, self::COURSE_CURRENT);
$this->add_course_essentials($coursenode, $course);
$this->load_course_sections($course, $coursenode);
break;
case self::TYPE_SECTION :
$sql = 'SELECT c.*, cs.section AS sectionnumber
FROM {course} c
LEFT JOIN {course_sections} cs ON cs.course = c.id
WHERE cs.id = ?';
$course = $DB->get_record_sql($sql, array($this->instanceid), MUST_EXIST);
require_course_login($course, true, null, false, true);
$this->page->set_context(context_course::instance($course->id));
$coursenode = $this->add_course($course, false, self::COURSE_CURRENT);
$this->add_course_essentials($coursenode, $course);
$this->load_course_sections($course, $coursenode, $course->sectionnumber);
break;
case self::TYPE_ACTIVITY :
$sql = "SELECT c.*
FROM {course} c
JOIN {course_modules} cm ON cm.course = c.id
WHERE cm.id = :cmid";
$params = array('cmid' => $this->instanceid);
$course = $DB->get_record_sql($sql, $params, MUST_EXIST);
$modinfo = get_fast_modinfo($course);
$cm = $modinfo->get_cm($this->instanceid);
require_course_login($course, true, $cm, false, true);
$this->page->set_context(context_module::instance($cm->id));
$coursenode = $this->add_course($course, false, self::COURSE_CURRENT);
$this->load_course_sections($course, $coursenode, null, $cm);
$activitynode = $coursenode->find($cm->id, self::TYPE_ACTIVITY);
if ($activitynode) {
$modulenode = $this->load_activity($cm, $course, $activitynode);
}
break;
default:
throw new Exception('Unknown type');
return $this->expandable;
}
if ($this->page->context->contextlevel == CONTEXT_COURSE && $this->page->context->instanceid != $SITE->id) {
$this->load_for_user(null, true);
}
// Give the local plugins a chance to include some navigation if they want.
$this->load_local_plugin_navigation();
$this->find_expandable($this->expandable);
return $this->expandable;
}
/**
* They've expanded the general 'courses' branch.
*/
protected function load_courses_other() {
$this->load_all_courses();
}
/**
* Loads a single category into the AJAX navigation.
*
* This function is special in that it doesn't concern itself with the parent of
* the requested category or its siblings.
* This is because with the AJAX navigation we know exactly what is wanted and only need to
* request that.
*
* @global moodle_database $DB
* @param int $categoryid id of category to load in navigation.
* @param int $nodetype type of node, if category is under MyHome then it's TYPE_MY_CATEGORY
* @return void.
*/
protected function load_category($categoryid, $nodetype = self::TYPE_CATEGORY) {
global $CFG, $DB;
$limit = 20;
if (!empty($CFG->navcourselimit)) {
$limit = (int)$CFG->navcourselimit;
}
$catcontextsql = context_helper::get_preload_record_columns_sql('ctx');
$sql = "SELECT cc.*, $catcontextsql
FROM {course_categories} cc
JOIN {context} ctx ON cc.id = ctx.instanceid
WHERE ctx.contextlevel = ".CONTEXT_COURSECAT." AND
(cc.id = :categoryid1 OR cc.parent = :categoryid2)
ORDER BY cc.depth ASC, cc.sortorder ASC, cc.id ASC";
$params = array('categoryid1' => $categoryid, 'categoryid2' => $categoryid);
$categories = $DB->get_recordset_sql($sql, $params, 0, $limit);
$categorylist = array();
$subcategories = array();
$basecategory = null;
foreach ($categories as $category) {
$categorylist[] = $category->id;
context_helper::preload_from_record($category);
if ($category->id == $categoryid) {
$this->add_category($category, $this, $nodetype);
$basecategory = $this->addedcategories[$category->id];
} else {
$subcategories[$category->id] = $category;
}
}
$categories->close();
// If category is shown in MyHome then only show enrolled courses and hide empty subcategories,
// else show all courses.
if ($nodetype === self::TYPE_MY_CATEGORY) {
$courses = enrol_get_my_courses('*');
$categoryids = array();
// Only search for categories if basecategory was found.
if (!is_null($basecategory)) {
// Get course parent category ids.
foreach ($courses as $course) {
$categoryids[] = $course->category;
}
// Get a unique list of category ids which a part of the path
// to user's courses.
$coursesubcategories = array();
$addedsubcategories = array();
list($sql, $params) = $DB->get_in_or_equal($categoryids);
$categories = $DB->get_recordset_select('course_categories', 'id '.$sql, $params, 'sortorder, id', 'id, path');
foreach ($categories as $category){
$coursesubcategories = array_merge($coursesubcategories, explode('/', trim($category->path, "/")));
}
$categories->close();
$coursesubcategories = array_unique($coursesubcategories);
// Only add a subcategory if it is part of the path to user's course and
// wasn't already added.
foreach ($subcategories as $subid => $subcategory) {
if (in_array($subid, $coursesubcategories) &&
!in_array($subid, $addedsubcategories)) {
$this->add_category($subcategory, $basecategory, $nodetype);
$addedsubcategories[] = $subid;
}
}
}
foreach ($courses as $course) {
// Add course if it's in category.
if (in_array($course->category, $categorylist)) {
$this->add_course($course, true, self::COURSE_MY);
}
}
} else {
if (!is_null($basecategory)) {
foreach ($subcategories as $key=>$category) {
$this->add_category($category, $basecategory, $nodetype);
}
}
$courses = $DB->get_recordset('course', array('category' => $categoryid), 'sortorder', '*' , 0, $limit);
foreach ($courses as $course) {
$this->add_course($course);
}
$courses->close();
}
}
/**
* Returns an array of expandable nodes
* @return array
*/
public function get_expandable() {
return $this->expandable;
}
}
/**
* Navbar class
*
* This class is used to manage the navbar, which is initialised from the navigation
* object held by PAGE
*
* @package core
* @category navigation
* @copyright 2009 Sam Hemelryk
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class navbar extends navigation_node {
/** @var bool A switch for whether the navbar is initialised or not */
protected $initialised = false;
/** @var mixed keys used to reference the nodes on the navbar */
protected $keys = array();
/** @var null|string content of the navbar */
protected $content = null;
/** @var moodle_page object the moodle page that this navbar belongs to */
protected $page;
/** @var bool A switch for whether to ignore the active navigation information */
protected $ignoreactive = false;
/** @var bool A switch to let us know if we are in the middle of an install */
protected $duringinstall = false;
/** @var bool A switch for whether the navbar has items */
protected $hasitems = false;
/** @var array An array of navigation nodes for the navbar */
protected $items;
/** @var array An array of child node objects */
public $children = array();
/** @var bool A switch for whether we want to include the root node in the navbar */
public $includesettingsbase = false;
/** @var breadcrumb_navigation_node[] $prependchildren */
protected $prependchildren = array();
/**
* The almighty constructor
*
* @param moodle_page $page
*/
public function __construct(moodle_page $page) {
global $CFG;
if (during_initial_install()) {
$this->duringinstall = true;
return false;
}
$this->page = $page;
$this->text = get_string('home');
$this->shorttext = get_string('home');
$this->action = new moodle_url($CFG->wwwroot);
$this->nodetype = self::NODETYPE_BRANCH;
$this->type = self::TYPE_SYSTEM;
}
/**
* Quick check to see if the navbar will have items in.
*
* @return bool Returns true if the navbar will have items, false otherwise
*/
public function has_items() {
if ($this->duringinstall) {
return false;
} else if ($this->hasitems !== false) {
return true;
}
if (count($this->children) > 0 || count($this->prependchildren) > 0) {
// There have been manually added items - there are definitely items.
$outcome = true;
} else if (!$this->ignoreactive) {
// We will need to initialise the navigation structure to check if there are active items.
$this->page->navigation->initialise($this->page);
$outcome = ($this->page->navigation->contains_active_node() || $this->page->settingsnav->contains_active_node());
}
$this->hasitems = $outcome;
return $outcome;
}
/**
* Turn on/off ignore active
*
* @param bool $setting
*/
public function ignore_active($setting=true) {
$this->ignoreactive = ($setting);
}
/**
* Gets a navigation node
*
* @param string|int $key for referencing the navbar nodes
* @param int $type breadcrumb_navigation_node::TYPE_*
* @return breadcrumb_navigation_node|bool
*/
public function get($key, $type = null) {
foreach ($this->children as &$child) {
if ($child->key === $key && ($type == null || $type == $child->type)) {
return $child;
}
}
foreach ($this->prependchildren as &$child) {
if ($child->key === $key && ($type == null || $type == $child->type)) {
return $child;
}
}
return false;
}
/**
* Returns an array of breadcrumb_navigation_nodes that make up the navbar.
*
* @return array
*/
public function get_items() {
global $CFG;
$items = array();
// Make sure that navigation is initialised
if (!$this->has_items()) {
return $items;
}
if ($this->items !== null) {
return $this->items;
}
if (count($this->children) > 0) {
// Add the custom children.
$items = array_reverse($this->children);
}
// Check if navigation contains the active node
if (!$this->ignoreactive) {
// We will need to ensure the navigation has been initialised.
$this->page->navigation->initialise($this->page);
// Now find the active nodes on both the navigation and settings.
$navigationactivenode = $this->page->navigation->find_active_node();
$settingsactivenode = $this->page->settingsnav->find_active_node();
if ($navigationactivenode && $settingsactivenode) {
// Parse a combined navigation tree
while ($settingsactivenode && $settingsactivenode->parent !== null) {
if (!$settingsactivenode->mainnavonly) {
$items[] = new breadcrumb_navigation_node($settingsactivenode);
}
$settingsactivenode = $settingsactivenode->parent;
}
if (!$this->includesettingsbase) {
// Removes the first node from the settings (root node) from the list
array_pop($items);
}
while ($navigationactivenode && $navigationactivenode->parent !== null) {
if (!$navigationactivenode->mainnavonly) {
$items[] = new breadcrumb_navigation_node($navigationactivenode);
}
if (!empty($CFG->navshowcategories) &&
$navigationactivenode->type === self::TYPE_COURSE &&
$navigationactivenode->parent->key === 'currentcourse') {
foreach ($this->get_course_categories() as $item) {
$items[] = new breadcrumb_navigation_node($item);
}
}
$navigationactivenode = $navigationactivenode->parent;
}
} else if ($navigationactivenode) {
// Parse the navigation tree to get the active node
while ($navigationactivenode && $navigationactivenode->parent !== null) {
if (!$navigationactivenode->mainnavonly) {
$items[] = new breadcrumb_navigation_node($navigationactivenode);
}
if (!empty($CFG->navshowcategories) &&
$navigationactivenode->type === self::TYPE_COURSE &&
$navigationactivenode->parent->key === 'currentcourse') {
foreach ($this->get_course_categories() as $item) {
$items[] = new breadcrumb_navigation_node($item);
}
}
$navigationactivenode = $navigationactivenode->parent;
}
} else if ($settingsactivenode) {
// Parse the settings navigation to get the active node
while ($settingsactivenode && $settingsactivenode->parent !== null) {
if (!$settingsactivenode->mainnavonly) {
$items[] = new breadcrumb_navigation_node($settingsactivenode);
}
$settingsactivenode = $settingsactivenode->parent;
}
}
}
$items[] = new breadcrumb_navigation_node(array(
'text' => $this->page->navigation->text,
'shorttext' => $this->page->navigation->shorttext,
'key' => $this->page->navigation->key,
'action' => $this->page->navigation->action
));
if (count($this->prependchildren) > 0) {
// Add the custom children
$items = array_merge($items, array_reverse($this->prependchildren));
}
$last = reset($items);
if ($last) {
$last->set_last(true);
}
$this->items = array_reverse($items);
return $this->items;
}
/**
* Get the list of categories leading to this course.
*
* This function is used by {@link navbar::get_items()} to add back the "courses"
* node and category chain leading to the current course. Note that this is only ever
* called for the current course, so we don't need to bother taking in any parameters.
*
* @return array
*/
private function get_course_categories() {
global $CFG;
require_once($CFG->dirroot.'/course/lib.php');
$categories = array();
$cap = 'moodle/category:viewhiddencategories';
$showcategories = !core_course_category::is_simple_site();
if ($showcategories) {
foreach ($this->page->categories as $category) {
$context = context_coursecat::instance($category->id);
if (!core_course_category::can_view_category($category)) {
continue;
}
$url = new moodle_url('/course/index.php', array('categoryid' => $category->id));
$name = format_string($category->name, true, array('context' => $context));
$categorynode = breadcrumb_navigation_node::create($name, $url, self::TYPE_CATEGORY, null, $category->id);
if (!$category->visible) {
$categorynode->hidden = true;
}
$categories[] = $categorynode;
}
}
// Don't show the 'course' node if enrolled in this course.
if (!is_enrolled(context_course::instance($this->page->course->id, null, '', true))) {
$courses = $this->page->navigation->get('courses');
if (!$courses) {
// Courses node may not be present.
$courses = breadcrumb_navigation_node::create(
get_string('courses'),
new moodle_url('/course/index.php'),
self::TYPE_CONTAINER
);
}
$categories[] = $courses;
}
return $categories;
}
/**
* Add a new breadcrumb_navigation_node to the navbar, overrides parent::add
*
* This function overrides {@link breadcrumb_navigation_node::add()} so that we can change
* the way nodes get added to allow us to simply call add and have the node added to the
* end of the navbar
*
* @param string $text
* @param string|moodle_url|action_link $action An action to associate with this node.
* @param int $type One of navigation_node::TYPE_*
* @param string $shorttext
* @param string|int $key A key to identify this node with. Key + type is unique to a parent.
* @param pix_icon $icon An optional icon to use for this node.
* @return navigation_node
*/
public function add($text, $action=null, $type=self::TYPE_CUSTOM, $shorttext=null, $key=null, pix_icon $icon=null) {
if ($this->content !== null) {
debugging('Nav bar items must be printed before $OUTPUT->header() has been called', DEBUG_DEVELOPER);
}
// Properties array used when creating the new navigation node
$itemarray = array(
'text' => $text,
'type' => $type
);
// Set the action if one was provided
if ($action!==null) {
$itemarray['action'] = $action;
}
// Set the shorttext if one was provided
if ($shorttext!==null) {
$itemarray['shorttext'] = $shorttext;
}
// Set the icon if one was provided
if ($icon!==null) {
$itemarray['icon'] = $icon;
}
// Default the key to the number of children if not provided
if ($key === null) {
$key = count($this->children);
}
// Set the key
$itemarray['key'] = $key;
// Set the parent to this node
$itemarray['parent'] = $this;
// Add the child using the navigation_node_collections add method
$this->children[] = new breadcrumb_navigation_node($itemarray);
return $this;
}
/**
* Prepends a new navigation_node to the start of the navbar
*
* @param string $text
* @param string|moodle_url|action_link $action An action to associate with this node.
* @param int $type One of navigation_node::TYPE_*
* @param string $shorttext
* @param string|int $key A key to identify this node with. Key + type is unique to a parent.
* @param pix_icon $icon An optional icon to use for this node.
* @return navigation_node
*/
public function prepend($text, $action=null, $type=self::TYPE_CUSTOM, $shorttext=null, $key=null, pix_icon $icon=null) {
if ($this->content !== null) {
debugging('Nav bar items must be printed before $OUTPUT->header() has been called', DEBUG_DEVELOPER);
}
// Properties array used when creating the new navigation node.
$itemarray = array(
'text' => $text,
'type' => $type
);
// Set the action if one was provided.
if ($action!==null) {
$itemarray['action'] = $action;
}
// Set the shorttext if one was provided.
if ($shorttext!==null) {
$itemarray['shorttext'] = $shorttext;
}
// Set the icon if one was provided.
if ($icon!==null) {
$itemarray['icon'] = $icon;
}
// Default the key to the number of children if not provided.
if ($key === null) {
$key = count($this->children);
}
// Set the key.
$itemarray['key'] = $key;
// Set the parent to this node.
$itemarray['parent'] = $this;
// Add the child node to the prepend list.
$this->prependchildren[] = new breadcrumb_navigation_node($itemarray);
return $this;
}
}
/**
* Subclass of navigation_node allowing different rendering for the breadcrumbs
* in particular adding extra metadata for search engine robots to leverage.
*
* @package core
* @category navigation
* @copyright 2015 Brendan Heywood
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class breadcrumb_navigation_node extends navigation_node {
/** @var $last boolean A flag indicating this is the last item in the list of breadcrumbs. */
private $last = false;
/**
* A proxy constructor
*
* @param mixed $navnode A navigation_node or an array
*/
public function __construct($navnode) {
if (is_array($navnode)) {
parent::__construct($navnode);
} else if ($navnode instanceof navigation_node) {
// Just clone everything.
$objvalues = get_object_vars($navnode);
foreach ($objvalues as $key => $value) {
$this->$key = $value;
}
} else {
throw new coding_exception('Not a valid breadcrumb_navigation_node');
}
}
/**
* Getter for "last"
* @return boolean
*/
public function is_last() {
return $this->last;
}
/**
* Setter for "last"
* @param $val boolean
*/
public function set_last($val) {
$this->last = $val;
}
}
/**
* Subclass of navigation_node allowing different rendering for the flat navigation
* in particular allowing dividers and indents.
*
* @package core
* @category navigation
* @copyright 2016 Damyon Wiese
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class flat_navigation_node extends navigation_node {
/** @var $indent integer The indent level */
private $indent = 0;
/** @var $showdivider bool Show a divider before this element */
private $showdivider = false;
/** @var $collectionlabel string Label for a group of nodes */
private $collectionlabel = '';
/**
* A proxy constructor
*
* @param mixed $navnode A navigation_node or an array
*/
public function __construct($navnode, $indent) {
if (is_array($navnode)) {
parent::__construct($navnode);
} else if ($navnode instanceof navigation_node) {
// Just clone everything.
$objvalues = get_object_vars($navnode);
foreach ($objvalues as $key => $value) {
$this->$key = $value;
}
} else {
throw new coding_exception('Not a valid flat_navigation_node');
}
$this->indent = $indent;
}
/**
* Setter, a label is required for a flat navigation node that shows a divider.
*
* @param string $label
*/
public function set_collectionlabel($label) {
$this->collectionlabel = $label;
}
/**
* Getter, get the label for this flat_navigation node, or it's parent if it doesn't have one.
*
* @return string
*/
public function get_collectionlabel() {
if (!empty($this->collectionlabel)) {
return $this->collectionlabel;
}
if ($this->parent && ($this->parent instanceof flat_navigation_node || $this->parent instanceof flat_navigation)) {
return $this->parent->get_collectionlabel();
}
debugging('Navigation region requires a label', DEBUG_DEVELOPER);
return '';
}
/**
* Does this node represent a course section link.
* @return boolean
*/
public function is_section() {
return $this->type == navigation_node::TYPE_SECTION;
}
/**
* In flat navigation - sections are active if we are looking at activities in the section.
* @return boolean
*/
public function isactive() {
global $PAGE;
if ($this->is_section()) {
$active = $PAGE->navigation->find_active_node();
while ($active = $active->parent) {
if ($active->key == $this->key && $active->type == $this->type) {
return true;
}
}
}
return $this->isactive;
}
/**
* Getter for "showdivider"
* @return boolean
*/
public function showdivider() {
return $this->showdivider;
}
/**
* Setter for "showdivider"
* @param $val boolean
* @param $label string Label for the group of nodes
*/
public function set_showdivider($val, $label = '') {
$this->showdivider = $val;
if ($this->showdivider && empty($label)) {
debugging('Navigation region requires a label', DEBUG_DEVELOPER);
} else {
$this->set_collectionlabel($label);
}
}
/**
* Getter for "indent"
* @return boolean
*/
public function get_indent() {
return $this->indent;
}
/**
* Setter for "indent"
* @param $val boolean
*/
public function set_indent($val) {
$this->indent = $val;
}
}
/**
* Class used to generate a collection of navigation nodes most closely related
* to the current page.
*
* @package core
* @copyright 2016 Damyon Wiese
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class flat_navigation extends navigation_node_collection {
/** @var moodle_page the moodle page that the navigation belongs to */
protected $page;
/**
* Constructor.
*
* @param moodle_page $page
*/
public function __construct(moodle_page &$page) {
if (during_initial_install()) {
return false;
}
$this->page = $page;
}
/**
* Build the list of navigation nodes based on the current navigation and settings trees.
*
*/
public function initialise() {
global $PAGE, $USER, $OUTPUT, $CFG;
if (during_initial_install()) {
return;
}
$current = false;
$course = $PAGE->course;
$this->page->navigation->initialise();
// First walk the nav tree looking for "flat_navigation" nodes.
if ($course->id > 1) {
// It's a real course.
$url = new moodle_url('/course/view.php', array('id' => $course->id));
$coursecontext = context_course::instance($course->id, MUST_EXIST);
// This is the name that will be shown for the course.
$coursename = empty($CFG->navshowfullcoursenames) ?
format_string($course->shortname, true, array('context' => $coursecontext)) :
format_string($course->fullname, true, array('context' => $coursecontext));
$flat = new flat_navigation_node(navigation_node::create($coursename, $url), 0);
$flat->set_collectionlabel($coursename);
$flat->key = 'coursehome';
$flat->icon = new pix_icon('i/course', '');
$courseformat = course_get_format($course);
$coursenode = $PAGE->navigation->find_active_node();
$targettype = navigation_node::TYPE_COURSE;
// Single activity format has no course node - the course node is swapped for the activity node.
if (!$courseformat->has_view_page()) {
$targettype = navigation_node::TYPE_ACTIVITY;
}
while (!empty($coursenode) && ($coursenode->type != $targettype)) {
$coursenode = $coursenode->parent;
}
// There is one very strange page in mod/feedback/view.php which thinks it is both site and course
// context at the same time. That page is broken but we need to handle it (hence the SITEID).
if ($coursenode && $coursenode->key != SITEID) {
$this->add($flat);
foreach ($coursenode->children as $child) {
if ($child->action) {
$flat = new flat_navigation_node($child, 0);
$this->add($flat);
}
}
}
$this->page->navigation->build_flat_navigation_list($this, true, get_string('site'));
} else {
$this->page->navigation->build_flat_navigation_list($this, false, get_string('site'));
}
$admin = $PAGE->settingsnav->find('siteadministration', navigation_node::TYPE_SITE_ADMIN);
if (!$admin) {
// Try again - crazy nav tree!
$admin = $PAGE->settingsnav->find('root', navigation_node::TYPE_SITE_ADMIN);
}
if ($admin) {
$flat = new flat_navigation_node($admin, 0);
$flat->set_showdivider(true, get_string('sitesettings'));
$flat->key = 'sitesettings';
$flat->icon = new pix_icon('t/preferences', '');
$this->add($flat);
}
// Add-a-block in editing mode.
if (isset($this->page->theme->addblockposition) &&
$this->page->theme->addblockposition == BLOCK_ADDBLOCK_POSITION_FLATNAV &&
$PAGE->user_is_editing() && $PAGE->user_can_edit_blocks() &&
($addable = $PAGE->blocks->get_addable_blocks())) {
$url = new moodle_url($PAGE->url, ['bui_addblock' => '', 'sesskey' => sesskey()]);
$addablock = navigation_node::create(get_string('addblock'), $url);
$flat = new flat_navigation_node($addablock, 0);
$flat->set_showdivider(true, get_string('blocksaddedit'));
$flat->key = 'addblock';
$flat->icon = new pix_icon('i/addblock', '');
$this->add($flat);
$blocks = [];
foreach ($addable as $block) {
$blocks[] = $block->name;
}
$params = array('blocks' => $blocks, 'url' => '?' . $url->get_query_string(false));
$PAGE->requires->js_call_amd('core/addblockmodal', 'init', array($params));
}
}
/**
* Override the parent so we can set a label for this collection if it has not been set yet.
*
* @param navigation_node $node Node to add
* @param string $beforekey If specified, adds before a node with this key,
* otherwise adds at end
* @return navigation_node Added node
*/
public function add(navigation_node $node, $beforekey=null) {
$result = parent::add($node, $beforekey);
// Extend the parent to get a name for the collection of nodes if required.
if (empty($this->collectionlabel)) {
if ($node instanceof flat_navigation_node) {
$this->set_collectionlabel($node->get_collectionlabel());
}
}
return $result;
}
}
/**
* Class used to manage the settings option for the current page
*
* This class is used to manage the settings options in a tree format (recursively)
* and was created initially for use with the settings blocks.
*
* @package core
* @category navigation
* @copyright 2009 Sam Hemelryk
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class settings_navigation extends navigation_node {
/** @var stdClass the current context */
protected $context;
/** @var moodle_page the moodle page that the navigation belongs to */
protected $page;
/** @var string contains administration section navigation_nodes */
protected $adminsection;
/** @var bool A switch to see if the navigation node is initialised */
protected $initialised = false;
/** @var array An array of users that the nodes can extend for. */
protected $userstoextendfor = array();
/** @var navigation_cache **/
protected $cache;
/**
* Sets up the object with basic settings and preparse it for use
*
* @param moodle_page $page
*/
public function __construct(moodle_page &$page) {
if (during_initial_install()) {
return false;
}
$this->page = $page;
// Initialise the main navigation. It is most important that this is done
// before we try anything
$this->page->navigation->initialise();
// Initialise the navigation cache
$this->cache = new navigation_cache(NAVIGATION_CACHE_NAME);
$this->children = new navigation_node_collection();
}
/**
* Initialise the settings navigation based on the current context
*
* This function initialises the settings navigation tree for a given context
* by calling supporting functions to generate major parts of the tree.
*
*/
public function initialise() {
global $DB, $SESSION, $SITE;
if (during_initial_install()) {
return false;
} else if ($this->initialised) {
return true;
}
$this->id = 'settingsnav';
$this->context = $this->page->context;
$context = $this->context;
if ($context->contextlevel == CONTEXT_BLOCK) {
$this->load_block_settings();
$context = $context->get_parent_context();
$this->context = $context;
}
switch ($context->contextlevel) {
case CONTEXT_SYSTEM:
if ($this->page->url->compare(new moodle_url('/admin/settings.php', array('section'=>'frontpagesettings')))) {
$this->load_front_page_settings(($context->id == $this->context->id));
}
break;
case CONTEXT_COURSECAT:
$this->load_category_settings();
break;
case CONTEXT_COURSE:
if ($this->page->course->id != $SITE->id) {
$this->load_course_settings(($context->id == $this->context->id));
} else {
$this->load_front_page_settings(($context->id == $this->context->id));
}
break;
case CONTEXT_MODULE:
$this->load_module_settings();
$this->load_course_settings();
break;
case CONTEXT_USER:
if ($this->page->course->id != $SITE->id) {
$this->load_course_settings();
}
break;
}
$usersettings = $this->load_user_settings($this->page->course->id);
$adminsettings = false;
if (isloggedin() && !isguestuser() && (!isset($SESSION->load_navigation_admin) || $SESSION->load_navigation_admin)) {
$isadminpage = $this->is_admin_tree_needed();
if (has_capability('moodle/site:configview', context_system::instance())) {
if (has_capability('moodle/site:config', context_system::instance())) {
// Make sure this works even if config capability changes on the fly
// and also make it fast for admin right after login.
$SESSION->load_navigation_admin = 1;
if ($isadminpage) {
$adminsettings = $this->load_administration_settings();
}
} else if (!isset($SESSION->load_navigation_admin)) {
$adminsettings = $this->load_administration_settings();
$SESSION->load_navigation_admin = (int)($adminsettings->children->count() > 0);
} else if ($SESSION->load_navigation_admin) {
if ($isadminpage) {
$adminsettings = $this->load_administration_settings();
}
}
// Print empty navigation node, if needed.
if ($SESSION->load_navigation_admin && !$isadminpage) {
if ($adminsettings) {
// Do not print settings tree on pages that do not need it, this helps with performance.
$adminsettings->remove();
$adminsettings = false;
}
$siteadminnode = $this->add(get_string('administrationsite'), new moodle_url('/admin/search.php'),
self::TYPE_SITE_ADMIN, null, 'siteadministration');
$siteadminnode->id = 'expandable_branch_' . $siteadminnode->type . '_' .
clean_param($siteadminnode->key, PARAM_ALPHANUMEXT);
$siteadminnode->requiresajaxloading = 'true';
}
}
}
if ($context->contextlevel == CONTEXT_SYSTEM && $adminsettings) {
$adminsettings->force_open();
} else if ($context->contextlevel == CONTEXT_USER && $usersettings) {
$usersettings->force_open();
}
// At this point we give any local plugins the ability to extend/tinker with the navigation settings.
$this->load_local_plugin_settings();
foreach ($this->children as $key=>$node) {
if ($node->nodetype == self::NODETYPE_BRANCH && $node->children->count() == 0) {
// Site administration is shown as link.
if (!empty($SESSION->load_navigation_admin) && ($node->type === self::TYPE_SITE_ADMIN)) {
continue;
}
$node->remove();
}
}
$this->initialised = true;
}
/**
* Override the parent function so that we can add preceeding hr's and set a
* root node class against all first level element
*
* It does this by first calling the parent's add method {@link navigation_node::add()}
* and then proceeds to use the key to set class and hr
*
* @param string $text text to be used for the link.
* @param string|moodle_url $url url for the new node
* @param int $type the type of node navigation_node::TYPE_*
* @param string $shorttext
* @param string|int $key a key to access the node by.
* @param pix_icon $icon An icon that appears next to the node.
* @return navigation_node with the new node added to it.
*/
public function add($text, $url=null, $type=null, $shorttext=null, $key=null, pix_icon $icon=null) {
$node = parent::add($text, $url, $type, $shorttext, $key, $icon);
$node->add_class('root_node');
return $node;
}
/**
* This function allows the user to add something to the start of the settings
* navigation, which means it will be at the top of the settings navigation block
*
* @param string $text text to be used for the link.
* @param string|moodle_url $url url for the new node
* @param int $type the type of node navigation_node::TYPE_*
* @param string $shorttext
* @param string|int $key a key to access the node by.
* @param pix_icon $icon An icon that appears next to the node.
* @return navigation_node $node with the new node added to it.
*/
public function prepend($text, $url=null, $type=null, $shorttext=null, $key=null, pix_icon $icon=null) {
$children = $this->children;
$childrenclass = get_class($children);
$this->children = new $childrenclass;
$node = $this->add($text, $url, $type, $shorttext, $key, $icon);
foreach ($children as $child) {
$this->children->add($child);
}
return $node;
}
/**
* Does this page require loading of full admin tree or is
* it enough rely on AJAX?
*
* @return bool
*/
protected function is_admin_tree_needed() {
if (self::$loadadmintree) {
// Usually external admin page or settings page.
return true;
}
if ($this->page->pagelayout === 'admin' or strpos($this->page->pagetype, 'admin-') === 0) {
// Admin settings tree is intended for system level settings and management only, use navigation for the rest!
if ($this->page->context->contextlevel != CONTEXT_SYSTEM) {
return false;
}
return true;
}
return false;
}
/**
* Load the site administration tree
*
* This function loads the site administration tree by using the lib/adminlib library functions
*
* @param navigation_node $referencebranch A reference to a branch in the settings
* navigation tree
* @param part_of_admin_tree $adminbranch The branch to add, if null generate the admin
* tree and start at the beginning
* @return mixed A key to access the admin tree by
*/
protected function load_administration_settings(navigation_node $referencebranch=null, part_of_admin_tree $adminbranch=null) {
global $CFG;
// Check if we are just starting to generate this navigation.
if ($referencebranch === null) {
// Require the admin lib then get an admin structure
if (!function_exists('admin_get_root')) {
require_once($CFG->dirroot.'/lib/adminlib.php');
}
$adminroot = admin_get_root(false, false);
// This is the active section identifier
$this->adminsection = $this->page->url->param('section');
// Disable the navigation from automatically finding the active node
navigation_node::$autofindactive = false;
$referencebranch = $this->add(get_string('administrationsite'), '/admin/search.php', self::TYPE_SITE_ADMIN, null, 'root');
foreach ($adminroot->children as $adminbranch) {
$this->load_administration_settings($referencebranch, $adminbranch);
}
navigation_node::$autofindactive = true;
// Use the admin structure to locate the active page
if (!$this->contains_active_node() && $current = $adminroot->locate($this->adminsection, true)) {
$currentnode = $this;
while (($pathkey = array_pop($current->path))!==null && $currentnode) {
$currentnode = $currentnode->get($pathkey);
}
if ($currentnode) {
$currentnode->make_active();
}
} else {
$this->scan_for_active_node($referencebranch);
}
return $referencebranch;
} else if ($adminbranch->check_access()) {
// We have a reference branch that we can access and is not hidden `hurrah`
// Now we need to display it and any children it may have
$url = null;
$icon = null;
if ($adminbranch instanceof admin_settingpage) {
$url = new moodle_url('/'.$CFG->admin.'/settings.php', array('section'=>$adminbranch->name));
} else if ($adminbranch instanceof admin_externalpage) {
$url = $adminbranch->url;
} else if (!empty($CFG->linkadmincategories) && $adminbranch instanceof admin_category) {
$url = new moodle_url('/'.$CFG->admin.'/category.php', array('category' => $adminbranch->name));
}
// Add the branch
$reference = $referencebranch->add($adminbranch->visiblename, $url, self::TYPE_SETTING, null, $adminbranch->name, $icon);
if ($adminbranch->is_hidden()) {
if (($adminbranch instanceof admin_externalpage || $adminbranch instanceof admin_settingpage) && $adminbranch->name == $this->adminsection) {
$reference->add_class('hidden');
} else {
$reference->display = false;
}
}
// Check if we are generating the admin notifications and whether notificiations exist
if ($adminbranch->name === 'adminnotifications' && admin_critical_warnings_present()) {
$reference->add_class('criticalnotification');
}
// Check if this branch has children
if ($reference && isset($adminbranch->children) && is_array($adminbranch->children) && count($adminbranch->children)>0) {
foreach ($adminbranch->children as $branch) {
// Generate the child branches as well now using this branch as the reference
$this->load_administration_settings($reference, $branch);
}
} else {
$reference->icon = new pix_icon('i/settings', '');
}
}
}
/**
* This function recursivily scans nodes until it finds the active node or there
* are no more nodes.
* @param navigation_node $node
*/
protected function scan_for_active_node(navigation_node $node) {
if (!$node->check_if_active() && $node->children->count()>0) {
foreach ($node->children as &$child) {
$this->scan_for_active_node($child);
}
}
}
/**
* Gets a navigation node given an array of keys that represent the path to
* the desired node.
*
* @param array $path
* @return navigation_node|false
*/
protected function get_by_path(array $path) {
$node = $this->get(array_shift($path));
foreach ($path as $key) {
$node->get($key);
}
return $node;
}
/**
* This function loads the course settings that are available for the user
*
* @param bool $forceopen If set to true the course node will be forced open
* @return navigation_node|false
*/
protected function load_course_settings($forceopen = false) {
global $CFG;
require_once($CFG->dirroot . '/course/lib.php');
$course = $this->page->course;
$coursecontext = context_course::instance($course->id);
$adminoptions = course_get_user_administration_options($course, $coursecontext);
// note: do not test if enrolled or viewing here because we need the enrol link in Course administration section
$coursenode = $this->add(get_string('courseadministration'), null, self::TYPE_COURSE, null, 'courseadmin');
if ($forceopen) {
$coursenode->force_open();
}
if ($adminoptions->update) {
// Add the course settings link
$url = new moodle_url('/course/edit.php', array('id'=>$course->id));
$coursenode->add(get_string('editsettings'), $url, self::TYPE_SETTING, null, 'editsettings', new pix_icon('i/settings', ''));
}
if ($this->page->user_allowed_editing()) {
// Add the turn on/off settings
if ($this->page->url->compare(new moodle_url('/course/view.php'), URL_MATCH_BASE)) {
// We are on the course page, retain the current page params e.g. section.
$baseurl = clone($this->page->url);
$baseurl->param('sesskey', sesskey());
} else {
// Edit on the main course page.
$baseurl = new moodle_url('/course/view.php', array('id'=>$course->id, 'return'=>$this->page->url->out_as_local_url(false), 'sesskey'=>sesskey()));
}
$editurl = clone($baseurl);
if ($this->page->user_is_editing()) {
$editurl->param('edit', 'off');
$editstring = get_string('turneditingoff');
} else {
$editurl->param('edit', 'on');
$editstring = get_string('turneditingon');
}
$coursenode->add($editstring, $editurl, self::TYPE_SETTING, null, 'turneditingonoff', new pix_icon('i/edit', ''));
}
if ($adminoptions->editcompletion) {
// Add the course completion settings link
$url = new moodle_url('/course/completion.php', array('id' => $course->id));
$coursenode->add(get_string('coursecompletion', 'completion'), $url, self::TYPE_SETTING, null, null,
new pix_icon('i/settings', ''));
}
if (!$adminoptions->update && $adminoptions->tags) {
$url = new moodle_url('/course/tags.php', array('id' => $course->id));
$coursenode->add(get_string('coursetags', 'tag'), $url, self::TYPE_SETTING, null, 'coursetags', new pix_icon('i/settings', ''));
}
// add enrol nodes
enrol_add_course_navigation($coursenode, $course);
// Manage filters
if ($adminoptions->filters) {
$url = new moodle_url('/filter/manage.php', array('contextid'=>$coursecontext->id));
$coursenode->add(get_string('filters', 'admin'), $url, self::TYPE_SETTING, null, null, new pix_icon('i/filter', ''));
}
// View course reports.
if ($adminoptions->reports) {
$reportnav = $coursenode->add(get_string('reports'), null, self::TYPE_CONTAINER, null, 'coursereports',
new pix_icon('i/stats', ''));
$coursereports = core_component::get_plugin_list('coursereport');
foreach ($coursereports as $report => $dir) {
$libfile = $CFG->dirroot.'/course/report/'.$report.'/lib.php';
if (file_exists($libfile)) {
require_once($libfile);
$reportfunction = $report.'_report_extend_navigation';
if (function_exists($report.'_report_extend_navigation')) {
$reportfunction($reportnav, $course, $coursecontext);
}
}
}
$reports = get_plugin_list_with_function('report', 'extend_navigation_course', 'lib.php');
foreach ($reports as $reportfunction) {
$reportfunction($reportnav, $course, $coursecontext);
}
}
// Check if we can view the gradebook's setup page.
if ($adminoptions->gradebook) {
$url = new moodle_url('/grade/edit/tree/index.php', array('id' => $course->id));
$coursenode->add(get_string('gradebooksetup', 'grades'), $url, self::TYPE_SETTING,
null, 'gradebooksetup', new pix_icon('i/settings', ''));
}
// Add the context locking node.
$this->add_context_locking_node($coursenode, $coursecontext);
// Add outcome if permitted
if ($adminoptions->outcomes) {
$url = new moodle_url('/grade/edit/outcome/course.php', array('id'=>$course->id));
$coursenode->add(get_string('outcomes', 'grades'), $url, self::TYPE_SETTING, null, 'outcomes', new pix_icon('i/outcomes', ''));
}
//Add badges navigation
if ($adminoptions->badges) {
require_once($CFG->libdir .'/badgeslib.php');
badges_add_course_navigation($coursenode, $course);
}
// Backup this course
if ($adminoptions->backup) {
$url = new moodle_url('/backup/backup.php', array('id'=>$course->id));
$coursenode->add(get_string('backup'), $url, self::TYPE_SETTING, null, 'backup', new pix_icon('i/backup', ''));
}
// Restore to this course
if ($adminoptions->restore) {
$url = new moodle_url('/backup/restorefile.php', array('contextid'=>$coursecontext->id));
$coursenode->add(get_string('restore'), $url, self::TYPE_SETTING, null, 'restore', new pix_icon('i/restore', ''));
}
// Import data from other courses
if ($adminoptions->import) {
$url = new moodle_url('/backup/import.php', array('id'=>$course->id));
$coursenode->add(get_string('import'), $url, self::TYPE_SETTING, null, 'import', new pix_icon('i/import', ''));
}
// Reset this course
if ($adminoptions->reset) {
$url = new moodle_url('/course/reset.php', array('id'=>$course->id));
$coursenode->add(get_string('reset'), $url, self::TYPE_SETTING, null, 'reset', new pix_icon('i/return', ''));
}
// Questions
require_once($CFG->libdir . '/questionlib.php');
question_extend_settings_navigation($coursenode, $coursecontext)->trim_if_empty();
if ($adminoptions->update) {
// Repository Instances
if (!$this->cache->cached('contexthasrepos'.$coursecontext->id)) {
require_once($CFG->dirroot . '/repository/lib.php');
$editabletypes = repository::get_editable_types($coursecontext);
$haseditabletypes = !empty($editabletypes);
unset($editabletypes);
$this->cache->set('contexthasrepos'.$coursecontext->id, $haseditabletypes);
} else {
$haseditabletypes = $this->cache->{'contexthasrepos'.$coursecontext->id};
}
if ($haseditabletypes) {
$url = new moodle_url('/repository/manage_instances.php', array('contextid' => $coursecontext->id));
$coursenode->add(get_string('repositories'), $url, self::TYPE_SETTING, null, null, new pix_icon('i/repository', ''));
}
}
// Manage files
if ($adminoptions->files) {
// hidden in new courses and courses where legacy files were turned off
$url = new moodle_url('/files/index.php', array('contextid'=>$coursecontext->id));
$coursenode->add(get_string('courselegacyfiles'), $url, self::TYPE_SETTING, null, 'coursefiles', new pix_icon('i/folder', ''));
}
// Let plugins hook into course navigation.
$pluginsfunction = get_plugins_with_function('extend_navigation_course', 'lib.php');
foreach ($pluginsfunction as $plugintype => $plugins) {
// Ignore the report plugin as it was already loaded above.
if ($plugintype == 'report') {
continue;
}
foreach ($plugins as $pluginfunction) {
$pluginfunction($coursenode, $course, $coursecontext);
}
}
// Return we are done
return $coursenode;
}
/**
* This function calls the module function to inject module settings into the
* settings navigation tree.
*
* This only gets called if there is a corrosponding function in the modules
* lib file.
*
* For examples mod/forum/lib.php {@link forum_extend_settings_navigation()}
*
* @return navigation_node|false
*/
protected function load_module_settings() {
global $CFG;
if (!$this->page->cm && $this->context->contextlevel == CONTEXT_MODULE && $this->context->instanceid) {
$cm = get_coursemodule_from_id(false, $this->context->instanceid, 0, false, MUST_EXIST);
$this->page->set_cm($cm, $this->page->course);
}
$file = $CFG->dirroot.'/mod/'.$this->page->activityname.'/lib.php';
if (file_exists($file)) {
require_once($file);
}
$modulenode = $this->add(get_string('pluginadministration', $this->page->activityname), null, self::TYPE_SETTING, null, 'modulesettings');
$modulenode->nodetype = navigation_node::NODETYPE_BRANCH;
$modulenode->force_open();
// Settings for the module
if (has_capability('moodle/course:manageactivities', $this->page->cm->context)) {
$url = new moodle_url('/course/modedit.php', array('update' => $this->page->cm->id, 'return' => 1));
$modulenode->add(get_string('editsettings'), $url, navigation_node::TYPE_SETTING, null, 'modedit');
}
// Assign local roles
if (count(get_assignable_roles($this->page->cm->context))>0) {
$url = new moodle_url('/'.$CFG->admin.'/roles/assign.php', array('contextid'=>$this->page->cm->context->id));
$modulenode->add(get_string('localroles', 'role'), $url, self::TYPE_SETTING, null, 'roleassign');
}
// Override roles
if (has_capability('moodle/role:review', $this->page->cm->context) or count(get_overridable_roles($this->page->cm->context))>0) {
$url = new moodle_url('/'.$CFG->admin.'/roles/permissions.php', array('contextid'=>$this->page->cm->context->id));
$modulenode->add(get_string('permissions', 'role'), $url, self::TYPE_SETTING, null, 'roleoverride');
}
// Check role permissions
if (has_any_capability(array('moodle/role:assign', 'moodle/role:safeoverride','moodle/role:override', 'moodle/role:assign'), $this->page->cm->context)) {
$url = new moodle_url('/'.$CFG->admin.'/roles/check.php', array('contextid'=>$this->page->cm->context->id));
$modulenode->add(get_string('checkpermissions', 'role'), $url, self::TYPE_SETTING, null, 'rolecheck');
}
// Add the context locking node.
$this->add_context_locking_node($modulenode, $this->page->cm->context);
// Manage filters
if (has_capability('moodle/filter:manage', $this->page->cm->context) && count(filter_get_available_in_context($this->page->cm->context))>0) {
$url = new moodle_url('/filter/manage.php', array('contextid'=>$this->page->cm->context->id));
$modulenode->add(get_string('filters', 'admin'), $url, self::TYPE_SETTING, null, 'filtermanage');
}
// Add reports
$reports = get_plugin_list_with_function('report', 'extend_navigation_module', 'lib.php');
foreach ($reports as $reportfunction) {
$reportfunction($modulenode, $this->page->cm);
}
// Add a backup link
$featuresfunc = $this->page->activityname.'_supports';
if (function_exists($featuresfunc) && $featuresfunc(FEATURE_BACKUP_MOODLE2) && has_capability('moodle/backup:backupactivity', $this->page->cm->context)) {
$url = new moodle_url('/backup/backup.php', array('id'=>$this->page->cm->course, 'cm'=>$this->page->cm->id));
$modulenode->add(get_string('backup'), $url, self::TYPE_SETTING, null, 'backup');
}
// Restore this activity
$featuresfunc = $this->page->activityname.'_supports';
if (function_exists($featuresfunc) && $featuresfunc(FEATURE_BACKUP_MOODLE2) && has_capability('moodle/restore:restoreactivity', $this->page->cm->context)) {
$url = new moodle_url('/backup/restorefile.php', array('contextid'=>$this->page->cm->context->id));
$modulenode->add(get_string('restore'), $url, self::TYPE_SETTING, null, 'restore');
}
// Allow the active advanced grading method plugin to append its settings
$featuresfunc = $this->page->activityname.'_supports';
if (function_exists($featuresfunc) && $featuresfunc(FEATURE_ADVANCED_GRADING) && has_capability('moodle/grade:managegradingforms', $this->page->cm->context)) {
require_once($CFG->dirroot.'/grade/grading/lib.php');
$gradingman = get_grading_manager($this->page->cm->context, 'mod_'.$this->page->activityname);
$gradingman->extend_settings_navigation($this, $modulenode);
}
$function = $this->page->activityname.'_extend_settings_navigation';
if (function_exists($function)) {
$function($this, $modulenode);
}
// Remove the module node if there are no children.
if ($modulenode->children->count() <= 0) {
$modulenode->remove();
}
return $modulenode;
}
/**
* Loads the user settings block of the settings nav
*
* This function is simply works out the userid and whether we need to load
* just the current users profile settings, or the current user and the user the
* current user is viewing.
*
* This function has some very ugly code to work out the user, if anyone has
* any bright ideas please feel free to intervene.
*
* @param int $courseid The course id of the current course
* @return navigation_node|false
*/
protected function load_user_settings($courseid = SITEID) {
global $USER, $CFG;
if (isguestuser() || !isloggedin()) {
return false;
}
$navusers = $this->page->navigation->get_extending_users();
if (count($this->userstoextendfor) > 0 || count($navusers) > 0) {
$usernode = null;
foreach ($this->userstoextendfor as $userid) {
if ($userid == $USER->id) {
continue;
}
$node = $this->generate_user_settings($courseid, $userid, 'userviewingsettings');
if (is_null($usernode)) {
$usernode = $node;
}
}
foreach ($navusers as $user) {
if ($user->id == $USER->id) {
continue;
}
$node = $this->generate_user_settings($courseid, $user->id, 'userviewingsettings');
if (is_null($usernode)) {
$usernode = $node;
}
}
$this->generate_user_settings($courseid, $USER->id);
} else {
$usernode = $this->generate_user_settings($courseid, $USER->id);
}
return $usernode;
}
/**
* Extends the settings navigation for the given user.
*
* Note: This method gets called automatically if you call
* $PAGE->navigation->extend_for_user($userid)
*
* @param int $userid
*/
public function extend_for_user($userid) {
global $CFG;
if (!in_array($userid, $this->userstoextendfor)) {
$this->userstoextendfor[] = $userid;
if ($this->initialised) {
$this->generate_user_settings($this->page->course->id, $userid, 'userviewingsettings');
$children = array();
foreach ($this->children as $child) {
$children[] = $child;
}
array_unshift($children, array_pop($children));
$this->children = new navigation_node_collection();
foreach ($children as $child) {
$this->children->add($child);
}
}
}
}
/**
* This function gets called by {@link settings_navigation::load_user_settings()} and actually works out
* what can be shown/done
*
* @param int $courseid The current course' id
* @param int $userid The user id to load for
* @param string $gstitle The string to pass to get_string for the branch title
* @return navigation_node|false
*/
protected function generate_user_settings($courseid, $userid, $gstitle='usercurrentsettings') {
global $DB, $CFG, $USER, $SITE;
if ($courseid != $SITE->id) {
if (!empty($this->page->course->id) && $this->page->course->id == $courseid) {
$course = $this->page->course;
} else {
$select = context_helper::get_preload_record_columns_sql('ctx');
$sql = "SELECT c.*, $select
FROM {course} c
JOIN {context} ctx ON c.id = ctx.instanceid
WHERE c.id = :courseid AND ctx.contextlevel = :contextlevel";
$params = array('courseid' => $courseid, 'contextlevel' => CONTEXT_COURSE);
$course = $DB->get_record_sql($sql, $params, MUST_EXIST);
context_helper::preload_from_record($course);
}
} else {
$course = $SITE;
}
$coursecontext = context_course::instance($course->id); // Course context
$systemcontext = context_system::instance();
$currentuser = ($USER->id == $userid);
if ($currentuser) {
$user = $USER;
$usercontext = context_user::instance($user->id); // User context
} else {
$select = context_helper::get_preload_record_columns_sql('ctx');
$sql = "SELECT u.*, $select
FROM {user} u
JOIN {context} ctx ON u.id = ctx.instanceid
WHERE u.id = :userid AND ctx.contextlevel = :contextlevel";
$params = array('userid' => $userid, 'contextlevel' => CONTEXT_USER);
$user = $DB->get_record_sql($sql, $params, IGNORE_MISSING);
if (!$user) {
return false;
}
context_helper::preload_from_record($user);
// Check that the user can view the profile
$usercontext = context_user::instance($user->id); // User context
$canviewuser = has_capability('moodle/user:viewdetails', $usercontext);
if ($course->id == $SITE->id) {
if ($CFG->forceloginforprofiles && !has_coursecontact_role($user->id) && !$canviewuser) { // Reduce possibility of "browsing" userbase at site level
// Teachers can browse and be browsed at site level. If not forceloginforprofiles, allow access (bug #4366)
return false;
}
} else {
$canviewusercourse = has_capability('moodle/user:viewdetails', $coursecontext);
$userisenrolled = is_enrolled($coursecontext, $user->id, '', true);
if ((!$canviewusercourse && !$canviewuser) || !$userisenrolled) {
return false;
}
$canaccessallgroups = has_capability('moodle/site:accessallgroups', $coursecontext);
if (!$canaccessallgroups && groups_get_course_groupmode($course) == SEPARATEGROUPS && !$canviewuser) {
// If groups are in use, make sure we can see that group (MDL-45874). That does not apply to parents.
if ($courseid == $this->page->course->id) {
$mygroups = get_fast_modinfo($this->page->course)->groups;
} else {
$mygroups = groups_get_user_groups($courseid);
}
$usergroups = groups_get_user_groups($courseid, $userid);
if (!array_intersect_key($mygroups[0], $usergroups[0])) {
return false;
}
}
}
}
$fullname = fullname($user, has_capability('moodle/site:viewfullnames', $this->page->context));
$key = $gstitle;
$prefurl = new moodle_url('/user/preferences.php');
if ($gstitle != 'usercurrentsettings') {
$key .= $userid;
$prefurl->param('userid', $userid);
}
// Add a user setting branch.
if ($gstitle == 'usercurrentsettings') {
$dashboard = $this->add(get_string('myhome'), new moodle_url('/my/'), self::TYPE_CONTAINER, null, 'dashboard');
// This should be set to false as we don't want to show this to the user. It's only for generating the correct
// breadcrumb.
$dashboard->display = false;
if (get_home_page() == HOMEPAGE_MY) {
$dashboard->mainnavonly = true;
}
$iscurrentuser = ($user->id == $USER->id);
$baseargs = array('id' => $user->id);
if ($course->id != $SITE->id && !$iscurrentuser) {
$baseargs['course'] = $course->id;
$issitecourse = false;
} else {
// Load all categories and get the context for the system.
$issitecourse = true;
}
// Add the user profile to the dashboard.
$profilenode = $dashboard->add(get_string('profile'), new moodle_url('/user/profile.php',
array('id' => $user->id)), self::TYPE_SETTING, null, 'myprofile');
if (!empty($CFG->navadduserpostslinks)) {
// Add nodes for forum posts and discussions if the user can view either or both
// There are no capability checks here as the content of the page is based
// purely on the forums the current user has access too.
$forumtab = $profilenode->add(get_string('forumposts', 'forum'));
$forumtab->add(get_string('posts', 'forum'), new moodle_url('/mod/forum/user.php', $baseargs), null, 'myposts');
$forumtab->add(get_string('discussions', 'forum'), new moodle_url('/mod/forum/user.php',
array_merge($baseargs, array('mode' => 'discussions'))), null, 'mydiscussions');
}
// Add blog nodes.
if (!empty($CFG->enableblogs)) {
if (!$this->cache->cached('userblogoptions'.$user->id)) {
require_once($CFG->dirroot.'/blog/lib.php');
// Get all options for the user.
$options = blog_get_options_for_user($user);
$this->cache->set('userblogoptions'.$user->id, $options);
} else {
$options = $this->cache->{'userblogoptions'.$user->id};
}
if (count($options) > 0) {
$blogs = $profilenode->add(get_string('blogs', 'blog'), null, navigation_node::TYPE_CONTAINER);
foreach ($options as $type => $option) {
if ($type == "rss") {
$blogs->add($option['string'], $option['link'], self::TYPE_SETTING, null, null,
new pix_icon('i/rss', ''));
} else {
$blogs->add($option['string'], $option['link'], self::TYPE_SETTING, null, 'blog' . $type);
}
}
}
}
// Add the messages link.
// It is context based so can appear in the user's profile and in course participants information.
if (!empty($CFG->messaging)) {
$messageargs = array('user1' => $USER->id);
if ($USER->id != $user->id) {
$messageargs['user2'] = $user->id;
}
$url = new moodle_url('/message/index.php', $messageargs);
$dashboard->add(get_string('messages', 'message'), $url, self::TYPE_SETTING, null, 'messages');
}
// Add the "My private files" link.
// This link doesn't have a unique display for course context so only display it under the user's profile.
if ($issitecourse && $iscurrentuser && has_capability('moodle/user:manageownfiles', $usercontext)) {
$url = new moodle_url('/user/files.php');
$dashboard->add(get_string('privatefiles'), $url, self::TYPE_SETTING, null, 'privatefiles');
}
// Add a node to view the users notes if permitted.
if (!empty($CFG->enablenotes) &&
has_any_capability(array('moodle/notes:manage', 'moodle/notes:view'), $coursecontext)) {
$url = new moodle_url('/notes/index.php', array('user' => $user->id));
if ($coursecontext->instanceid != SITEID) {
$url->param('course', $coursecontext->instanceid);
}
$profilenode->add(get_string('notes', 'notes'), $url);
}
// Show the grades node.
if (($issitecourse && $iscurrentuser) || has_capability('moodle/user:viewdetails', $usercontext)) {
require_once($CFG->dirroot . '/user/lib.php');
// Set the grades node to link to the "Grades" page.
if ($course->id == SITEID) {
$url = user_mygrades_url($user->id, $course->id);
} else { // Otherwise we are in a course and should redirect to the user grade report (Activity report version).
$url = new moodle_url('/course/user.php', array('mode' => 'grade', 'id' => $course->id, 'user' => $user->id));
}
$dashboard->add(get_string('grades', 'grades'), $url, self::TYPE_SETTING, null, 'mygrades');
}
// Let plugins hook into user navigation.
$pluginsfunction = get_plugins_with_function('extend_navigation_user', 'lib.php');
foreach ($pluginsfunction as $plugintype => $plugins) {
if ($plugintype != 'report') {
foreach ($plugins as $pluginfunction) {
$pluginfunction($profilenode, $user, $usercontext, $course, $coursecontext);
}
}
}
$usersetting = navigation_node::create(get_string('preferences', 'moodle'), $prefurl, self::TYPE_CONTAINER, null, $key);
$dashboard->add_node($usersetting);
} else {
$usersetting = $this->add(get_string('preferences', 'moodle'), $prefurl, self::TYPE_CONTAINER, null, $key);
$usersetting->display = false;
}
$usersetting->id = 'usersettings';
// Check if the user has been deleted.
if ($user->deleted) {
if (!has_capability('moodle/user:update', $coursecontext)) {
// We can't edit the user so just show the user deleted message.
$usersetting->add(get_string('userdeleted'), null, self::TYPE_SETTING);
} else {
// We can edit the user so show the user deleted message and link it to the profile.
if ($course->id == $SITE->id) {
$profileurl = new moodle_url('/user/profile.php', array('id'=>$user->id));
} else {
$profileurl = new moodle_url('/user/view.php', array('id'=>$user->id, 'course'=>$course->id));
}
$usersetting->add(get_string('userdeleted'), $profileurl, self::TYPE_SETTING);
}
return true;
}
$userauthplugin = false;
if (!empty($user->auth)) {
$userauthplugin = get_auth_plugin($user->auth);
}
$useraccount = $usersetting->add(get_string('useraccount'), null, self::TYPE_CONTAINER, null, 'useraccount');
// Add the profile edit link.
if (isloggedin() && !isguestuser($user) && !is_mnet_remote_user($user)) {
if (($currentuser || is_siteadmin($USER) || !is_siteadmin($user)) &&
has_capability('moodle/user:update', $systemcontext)) {
$url = new moodle_url('/user/editadvanced.php', array('id'=>$user->id, 'course'=>$course->id));
$useraccount->add(get_string('editmyprofile'), $url, self::TYPE_SETTING, null, 'editprofile');
} else if ((has_capability('moodle/user:editprofile', $usercontext) && !is_siteadmin($user)) ||
($currentuser && has_capability('moodle/user:editownprofile', $systemcontext))) {
if ($userauthplugin && $userauthplugin->can_edit_profile()) {
$url = $userauthplugin->edit_profile_url();
if (empty($url)) {
$url = new moodle_url('/user/edit.php', array('id'=>$user->id, 'course'=>$course->id));
}
$useraccount->add(get_string('editmyprofile'), $url, self::TYPE_SETTING, null, 'editprofile');
}
}
}
// Change password link.
if ($userauthplugin && $currentuser && !\core\session\manager::is_loggedinas() && !isguestuser() &&
has_capability('moodle/user:changeownpassword', $systemcontext) && $userauthplugin->can_change_password()) {
$passwordchangeurl = $userauthplugin->change_password_url();
if (empty($passwordchangeurl)) {
$passwordchangeurl = new moodle_url('/login/change_password.php', array('id'=>$course->id));
}
$useraccount->add(get_string("changepassword"), $passwordchangeurl, self::TYPE_SETTING, null, 'changepassword');
}
// Default homepage.
$defaulthomepageuser = (!empty($CFG->defaulthomepage) && ($CFG->defaulthomepage == HOMEPAGE_USER));
if (isloggedin() && !isguestuser($user) && $defaulthomepageuser) {
if ($currentuser && has_capability('moodle/user:editownprofile', $systemcontext) ||
has_capability('moodle/user:editprofile', $usercontext)) {
$url = new moodle_url('/user/defaulthomepage.php', ['id' => $user->id]);
$useraccount->add(get_string('defaulthomepageuser'), $url, self::TYPE_SETTING, null, 'defaulthomepageuser');
}
}
if (isloggedin() && !isguestuser($user) && !is_mnet_remote_user($user)) {
if ($currentuser && has_capability('moodle/user:editownprofile', $systemcontext) ||
has_capability('moodle/user:editprofile', $usercontext)) {
$url = new moodle_url('/user/language.php', array('id' => $user->id, 'course' => $course->id));
$useraccount->add(get_string('preferredlanguage'), $url, self::TYPE_SETTING, null, 'preferredlanguage');
}
}
$pluginmanager = core_plugin_manager::instance();
$enabled = $pluginmanager->get_enabled_plugins('mod');
if (isset($enabled['forum']) && isloggedin() && !isguestuser($user) && !is_mnet_remote_user($user)) {
if ($currentuser && has_capability('moodle/user:editownprofile', $systemcontext) ||
has_capability('moodle/user:editprofile', $usercontext)) {
$url = new moodle_url('/user/forum.php', array('id' => $user->id, 'course' => $course->id));
$useraccount->add(get_string('forumpreferences'), $url, self::TYPE_SETTING);
}
}
$editors = editors_get_enabled();
if (count($editors) > 1) {
if (isloggedin() && !isguestuser($user) && !is_mnet_remote_user($user)) {
if ($currentuser && has_capability('moodle/user:editownprofile', $systemcontext) ||
has_capability('moodle/user:editprofile', $usercontext)) {
$url = new moodle_url('/user/editor.php', array('id' => $user->id, 'course' => $course->id));
$useraccount->add(get_string('editorpreferences'), $url, self::TYPE_SETTING);
}
}
}
// Add "Course preferences" link.
if (isloggedin() && !isguestuser($user)) {
if ($currentuser && has_capability('moodle/user:editownprofile', $systemcontext) ||
has_capability('moodle/user:editprofile', $usercontext)) {
$url = new moodle_url('/user/course.php', array('id' => $user->id, 'course' => $course->id));
$useraccount->add(get_string('coursepreferences'), $url, self::TYPE_SETTING, null, 'coursepreferences');
}
}
// Add "Calendar preferences" link.
if (isloggedin() && !isguestuser($user)) {
if ($currentuser && has_capability('moodle/user:editownprofile', $systemcontext) ||
has_capability('moodle/user:editprofile', $usercontext)) {
$url = new moodle_url('/user/calendar.php', array('id' => $user->id));
$useraccount->add(get_string('calendarpreferences', 'calendar'), $url, self::TYPE_SETTING, null, 'preferredcalendar');
}
}
// View the roles settings.
if (has_any_capability(array('moodle/role:assign', 'moodle/role:safeoverride', 'moodle/role:override',
'moodle/role:manage'), $usercontext)) {
$roles = $usersetting->add(get_string('roles'), null, self::TYPE_SETTING);
$url = new moodle_url('/admin/roles/usersroles.php', array('userid'=>$user->id, 'courseid'=>$course->id));
$roles->add(get_string('thisusersroles', 'role'), $url, self::TYPE_SETTING);
$assignableroles = get_assignable_roles($usercontext, ROLENAME_BOTH);
if (!empty($assignableroles)) {
$url = new moodle_url('/admin/roles/assign.php',
array('contextid' => $usercontext->id, 'userid' => $user->id, 'courseid' => $course->id));
$roles->add(get_string('assignrolesrelativetothisuser', 'role'), $url, self::TYPE_SETTING);
}
if (has_capability('moodle/role:review', $usercontext) || count(get_overridable_roles($usercontext, ROLENAME_BOTH))>0) {
$url = new moodle_url('/admin/roles/permissions.php',
array('contextid' => $usercontext->id, 'userid' => $user->id, 'courseid' => $course->id));
$roles->add(get_string('permissions', 'role'), $url, self::TYPE_SETTING);
}
$url = new moodle_url('/admin/roles/check.php',
array('contextid' => $usercontext->id, 'userid' => $user->id, 'courseid' => $course->id));
$roles->add(get_string('checkpermissions', 'role'), $url, self::TYPE_SETTING);
}
// Repositories.
if (!$this->cache->cached('contexthasrepos'.$usercontext->id)) {
require_once($CFG->dirroot . '/repository/lib.php');
$editabletypes = repository::get_editable_types($usercontext);
$haseditabletypes = !empty($editabletypes);
unset($editabletypes);
$this->cache->set('contexthasrepos'.$usercontext->id, $haseditabletypes);
} else {
$haseditabletypes = $this->cache->{'contexthasrepos'.$usercontext->id};
}
if ($haseditabletypes) {
$repositories = $usersetting->add(get_string('repositories', 'repository'), null, self::TYPE_SETTING);
$repositories->add(get_string('manageinstances', 'repository'), new moodle_url('/repository/manage_instances.php',
array('contextid' => $usercontext->id)));
}
// Portfolio.
if ($currentuser && !empty($CFG->enableportfolios) && has_capability('moodle/portfolio:export', $systemcontext)) {
require_once($CFG->libdir . '/portfoliolib.php');
if (portfolio_has_visible_instances()) {
$portfolio = $usersetting->add(get_string('portfolios', 'portfolio'), null, self::TYPE_SETTING);
$url = new moodle_url('/user/portfolio.php', array('courseid'=>$course->id));
$portfolio->add(get_string('configure', 'portfolio'), $url, self::TYPE_SETTING);
$url = new moodle_url('/user/portfoliologs.php', array('courseid'=>$course->id));
$portfolio->add(get_string('logs', 'portfolio'), $url, self::TYPE_SETTING);
}
}
$enablemanagetokens = false;
if (!empty($CFG->enablerssfeeds)) {
$enablemanagetokens = true;
} else if (!is_siteadmin($USER->id)
&& !empty($CFG->enablewebservices)
&& has_capability('moodle/webservice:createtoken', context_system::instance()) ) {
$enablemanagetokens = true;
}
// Security keys.
if ($currentuser && $enablemanagetokens) {
$url = new moodle_url('/user/managetoken.php', array('sesskey'=>sesskey()));
$useraccount->add(get_string('securitykeys', 'webservice'), $url, self::TYPE_SETTING);
}
// Messaging.
if (($currentuser && has_capability('moodle/user:editownmessageprofile', $systemcontext)) || (!isguestuser($user) &&
has_capability('moodle/user:editmessageprofile', $usercontext) && !is_primary_admin($user->id))) {
$messagingurl = new moodle_url('/message/edit.php', array('id' => $user->id));
$notificationsurl = new moodle_url('/message/notificationpreferences.php', array('userid' => $user->id));
$useraccount->add(get_string('messagepreferences', 'message'), $messagingurl, self::TYPE_SETTING);
$useraccount->add(get_string('notificationpreferences', 'message'), $notificationsurl, self::TYPE_SETTING);
}
// Blogs.
if ($currentuser && !empty($CFG->enableblogs)) {
$blog = $usersetting->add(get_string('blogs', 'blog'), null, navigation_node::TYPE_CONTAINER, null, 'blogs');
if (has_capability('moodle/blog:view', $systemcontext)) {
$blog->add(get_string('preferences', 'blog'), new moodle_url('/blog/preferences.php'),
navigation_node::TYPE_SETTING);
}
if (!empty($CFG->useexternalblogs) && $CFG->maxexternalblogsperuser > 0 &&
has_capability('moodle/blog:manageexternal', $systemcontext)) {
$blog->add(get_string('externalblogs', 'blog'), new moodle_url('/blog/external_blogs.php'),
navigation_node::TYPE_SETTING);
$blog->add(get_string('addnewexternalblog', 'blog'), new moodle_url('/blog/external_blog_edit.php'),
navigation_node::TYPE_SETTING);
}
// Remove the blog node if empty.
$blog->trim_if_empty();
}
// Badges.
if ($currentuser && !empty($CFG->enablebadges)) {
$badges = $usersetting->add(get_string('badges'), null, navigation_node::TYPE_CONTAINER, null, 'badges');
if (has_capability('moodle/badges:manageownbadges', $usercontext)) {
$url = new moodle_url('/badges/mybadges.php');
$badges->add(get_string('managebadges', 'badges'), $url, self::TYPE_SETTING);
}
$badges->add(get_string('preferences', 'badges'), new moodle_url('/badges/preferences.php'),
navigation_node::TYPE_SETTING);
if (!empty($CFG->badges_allowexternalbackpack)) {
$badges->add(get_string('backpackdetails', 'badges'), new moodle_url('/badges/mybackpack.php'),
navigation_node::TYPE_SETTING);
}
}
// Let plugins hook into user settings navigation.
$pluginsfunction = get_plugins_with_function('extend_navigation_user_settings', 'lib.php');
foreach ($pluginsfunction as $plugintype => $plugins) {
foreach ($plugins as $pluginfunction) {
$pluginfunction($usersetting, $user, $usercontext, $course, $coursecontext);
}
}
return $usersetting;
}
/**
* Loads block specific settings in the navigation
*
* @return navigation_node
*/
protected function load_block_settings() {
global $CFG;
$blocknode = $this->add($this->context->get_context_name(), null, self::TYPE_SETTING, null, 'blocksettings');
$blocknode->force_open();
// Assign local roles
if (get_assignable_roles($this->context, ROLENAME_ORIGINAL)) {
$assignurl = new moodle_url('/'.$CFG->admin.'/roles/assign.php', array('contextid' => $this->context->id));
$blocknode->add(get_string('assignroles', 'role'), $assignurl, self::TYPE_SETTING, null,
'roles', new pix_icon('i/assignroles', ''));
}
// Override roles
if (has_capability('moodle/role:review', $this->context) or count(get_overridable_roles($this->context))>0) {
$url = new moodle_url('/'.$CFG->admin.'/roles/permissions.php', array('contextid'=>$this->context->id));
$blocknode->add(get_string('permissions', 'role'), $url, self::TYPE_SETTING, null,
'permissions', new pix_icon('i/permissions', ''));
}
// Check role permissions
if (has_any_capability(array('moodle/role:assign', 'moodle/role:safeoverride','moodle/role:override', 'moodle/role:assign'), $this->context)) {
$url = new moodle_url('/'.$CFG->admin.'/roles/check.php', array('contextid'=>$this->context->id));
$blocknode->add(get_string('checkpermissions', 'role'), $url, self::TYPE_SETTING, null,
'checkpermissions', new pix_icon('i/checkpermissions', ''));
}
// Add the context locking node.
$this->add_context_locking_node($blocknode, $this->context);
return $blocknode;
}
/**
* Loads category specific settings in the navigation
*
* @return navigation_node
*/
protected function load_category_settings() {
global $CFG;
// We can land here while being in the context of a block, in which case we
// should get the parent context which should be the category one. See self::initialise().
if ($this->context->contextlevel == CONTEXT_BLOCK) {
$catcontext = $this->context->get_parent_context();
} else {
$catcontext = $this->context;
}
// Let's make sure that we always have the right context when getting here.
if ($catcontext->contextlevel != CONTEXT_COURSECAT) {
throw new coding_exception('Unexpected context while loading category settings.');
}
$categorynodetype = navigation_node::TYPE_CONTAINER;
$categorynode = $this->add($catcontext->get_context_name(), null, $categorynodetype, null, 'categorysettings');
$categorynode->nodetype = navigation_node::NODETYPE_BRANCH;
$categorynode->force_open();
if (can_edit_in_category($catcontext->instanceid)) {
$url = new moodle_url('/course/management.php', array('categoryid' => $catcontext->instanceid));
$editstring = get_string('managecategorythis');
$categorynode->add($editstring, $url, self::TYPE_SETTING, null, null, new pix_icon('i/edit', ''));
}
if (has_capability('moodle/category:manage', $catcontext)) {
$editurl = new moodle_url('/course/editcategory.php', array('id' => $catcontext->instanceid));
$categorynode->add(get_string('editcategorythis'), $editurl, self::TYPE_SETTING, null, 'edit', new pix_icon('i/edit', ''));
$addsubcaturl = new moodle_url('/course/editcategory.php', array('parent' => $catcontext->instanceid));
$categorynode->add(get_string('addsubcategory'), $addsubcaturl, self::TYPE_SETTING, null, 'addsubcat', new pix_icon('i/withsubcat', ''));
}
// Assign local roles
$assignableroles = get_assignable_roles($catcontext);
if (!empty($assignableroles)) {
$assignurl = new moodle_url('/'.$CFG->admin.'/roles/assign.php', array('contextid' => $catcontext->id));
$categorynode->add(get_string('assignroles', 'role'), $assignurl, self::TYPE_SETTING, null, 'roles', new pix_icon('i/assignroles', ''));
}
// Override roles
if (has_capability('moodle/role:review', $catcontext) or count(get_overridable_roles($catcontext)) > 0) {
$url = new moodle_url('/'.$CFG->admin.'/roles/permissions.php', array('contextid' => $catcontext->id));
$categorynode->add(get_string('permissions', 'role'), $url, self::TYPE_SETTING, null, 'permissions', new pix_icon('i/permissions', ''));
}
// Check role permissions
if (has_any_capability(array('moodle/role:assign', 'moodle/role:safeoverride',
'moodle/role:override', 'moodle/role:assign'), $catcontext)) {
$url = new moodle_url('/'.$CFG->admin.'/roles/check.php', array('contextid' => $catcontext->id));
$categorynode->add(get_string('checkpermissions', 'role'), $url, self::TYPE_SETTING, null, 'checkpermissions', new pix_icon('i/checkpermissions', ''));
}
// Add the context locking node.
$this->add_context_locking_node($categorynode, $catcontext);
// Cohorts
if (has_any_capability(array('moodle/cohort:view', 'moodle/cohort:manage'), $catcontext)) {
$categorynode->add(get_string('cohorts', 'cohort'), new moodle_url('/cohort/index.php',
array('contextid' => $catcontext->id)), self::TYPE_SETTING, null, 'cohort', new pix_icon('i/cohort', ''));
}
// Manage filters
if (has_capability('moodle/filter:manage', $catcontext) && count(filter_get_available_in_context($catcontext)) > 0) {
$url = new moodle_url('/filter/manage.php', array('contextid' => $catcontext->id));
$categorynode->add(get_string('filters', 'admin'), $url, self::TYPE_SETTING, null, 'filters', new pix_icon('i/filter', ''));
}
// Restore.
if (has_capability('moodle/restore:restorecourse', $catcontext)) {
$url = new moodle_url('/backup/restorefile.php', array('contextid' => $catcontext->id));
$categorynode->add(get_string('restorecourse', 'admin'), $url, self::TYPE_SETTING, null, 'restorecourse', new pix_icon('i/restore', ''));
}
// Let plugins hook into category settings navigation.
$pluginsfunction = get_plugins_with_function('extend_navigation_category_settings', 'lib.php');
foreach ($pluginsfunction as $plugintype => $plugins) {
foreach ($plugins as $pluginfunction) {
$pluginfunction($categorynode, $catcontext);
}
}
return $categorynode;
}
/**
* Determine whether the user is assuming another role
*
* This function checks to see if the user is assuming another role by means of
* role switching. In doing this we compare each RSW key (context path) against
* the current context path. This ensures that we can provide the switching
* options against both the course and any page shown under the course.
*
* @return bool|int The role(int) if the user is in another role, false otherwise
*/
protected function in_alternative_role() {
global $USER;
if (!empty($USER->access['rsw']) && is_array($USER->access['rsw'])) {
if (!empty($this->page->context) && !empty($USER->access['rsw'][$this->page->context->path])) {
return $USER->access['rsw'][$this->page->context->path];
}
foreach ($USER->access['rsw'] as $key=>$role) {
if (strpos($this->context->path,$key)===0) {
return $role;
}
}
}
return false;
}
/**
* This function loads all of the front page settings into the settings navigation.
* This function is called when the user is on the front page, or $COURSE==$SITE
* @param bool $forceopen (optional)
* @return navigation_node
*/
protected function load_front_page_settings($forceopen = false) {
global $SITE, $CFG;
require_once($CFG->dirroot . '/course/lib.php');
$course = clone($SITE);
$coursecontext = context_course::instance($course->id); // Course context
$adminoptions = course_get_user_administration_options($course, $coursecontext);
$frontpage = $this->add(get_string('frontpagesettings'), null, self::TYPE_SETTING, null, 'frontpage');
if ($forceopen) {
$frontpage->force_open();
}
$frontpage->id = 'frontpagesettings';
if ($this->page->user_allowed_editing()) {
// Add the turn on/off settings
$url = new moodle_url('/course/view.php', array('id'=>$course->id, 'sesskey'=>sesskey()));
if ($this->page->user_is_editing()) {
$url->param('edit', 'off');
$editstring = get_string('turneditingoff');
} else {
$url->param('edit', 'on');
$editstring = get_string('turneditingon');
}
$frontpage->add($editstring, $url, self::TYPE_SETTING, null, null, new pix_icon('i/edit', ''));
}
if ($adminoptions->update) {
// Add the course settings link
$url = new moodle_url('/admin/settings.php', array('section'=>'frontpagesettings'));
$frontpage->add(get_string('editsettings'), $url, self::TYPE_SETTING, null, null, new pix_icon('i/settings', ''));
}
// add enrol nodes
enrol_add_course_navigation($frontpage, $course);
// Manage filters
if ($adminoptions->filters) {
$url = new moodle_url('/filter/manage.php', array('contextid'=>$coursecontext->id));
$frontpage->add(get_string('filters', 'admin'), $url, self::TYPE_SETTING, null, null, new pix_icon('i/filter', ''));
}
// View course reports.
if ($adminoptions->reports) {
$frontpagenav = $frontpage->add(get_string('reports'), null, self::TYPE_CONTAINER, null, 'frontpagereports',
new pix_icon('i/stats', ''));
$coursereports = core_component::get_plugin_list('coursereport');
foreach ($coursereports as $report=>$dir) {
$libfile = $CFG->dirroot.'/course/report/'.$report.'/lib.php';
if (file_exists($libfile)) {
require_once($libfile);
$reportfunction = $report.'_report_extend_navigation';
if (function_exists($report.'_report_extend_navigation')) {
$reportfunction($frontpagenav, $course, $coursecontext);
}
}
}
$reports = get_plugin_list_with_function('report', 'extend_navigation_course', 'lib.php');
foreach ($reports as $reportfunction) {
$reportfunction($frontpagenav, $course, $coursecontext);
}
}
// Backup this course
if ($adminoptions->backup) {
$url = new moodle_url('/backup/backup.php', array('id'=>$course->id));
$frontpage->add(get_string('backup'), $url, self::TYPE_SETTING, null, null, new pix_icon('i/backup', ''));
}
// Restore to this course
if ($adminoptions->restore) {
$url = new moodle_url('/backup/restorefile.php', array('contextid'=>$coursecontext->id));
$frontpage->add(get_string('restore'), $url, self::TYPE_SETTING, null, null, new pix_icon('i/restore', ''));
}
// Questions
require_once($CFG->libdir . '/questionlib.php');
question_extend_settings_navigation($frontpage, $coursecontext)->trim_if_empty();
// Manage files
if ($adminoptions->files) {
//hiden in new installs
$url = new moodle_url('/files/index.php', array('contextid'=>$coursecontext->id));
$frontpage->add(get_string('sitelegacyfiles'), $url, self::TYPE_SETTING, null, null, new pix_icon('i/folder', ''));
}
// Let plugins hook into frontpage navigation.
$pluginsfunction = get_plugins_with_function('extend_navigation_frontpage', 'lib.php');
foreach ($pluginsfunction as $plugintype => $plugins) {
foreach ($plugins as $pluginfunction) {
$pluginfunction($frontpage, $course, $coursecontext);
}
}
return $frontpage;
}
/**
* This function gives local plugins an opportunity to modify the settings navigation.
*/
protected function load_local_plugin_settings() {
foreach (get_plugin_list_with_function('local', 'extend_settings_navigation') as $function) {
$function($this, $this->context);
}
}
/**
* This function marks the cache as volatile so it is cleared during shutdown
*/
public function clear_cache() {
$this->cache->volatile();
}
/**
* Checks to see if there are child nodes available in the specific user's preference node.
* If so, then they have the appropriate permissions view this user's preferences.
*
* @since Moodle 2.9.3
* @param int $userid The user's ID.
* @return bool True if child nodes exist to view, otherwise false.
*/
public function can_view_user_preferences($userid) {
if (is_siteadmin()) {
return true;
}
// See if any nodes are present in the preferences section for this user.
$preferencenode = $this->find('userviewingsettings' . $userid, null);
if ($preferencenode && $preferencenode->has_children()) {
// Run through each child node.
foreach ($preferencenode->children as $childnode) {
// If the child node has children then this user has access to a link in the preferences page.
if ($childnode->has_children()) {
return true;
}
}
}
// No links found for the user to access on the preferences page.
return false;
}
}
/**
* Class used to populate site admin navigation for ajax.
*
* @package core
* @category navigation
* @copyright 2013 Rajesh Taneja <rajesh@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class settings_navigation_ajax extends settings_navigation {
/**
* Constructs the navigation for use in an AJAX request
*
* @param moodle_page $page
*/
public function __construct(moodle_page &$page) {
$this->page = $page;
$this->cache = new navigation_cache(NAVIGATION_CACHE_NAME);
$this->children = new navigation_node_collection();
$this->initialise();
}
/**
* Initialise the site admin navigation.
*
* @return array An array of the expandable nodes
*/
public function initialise() {
if ($this->initialised || during_initial_install()) {
return false;
}
$this->context = $this->page->context;
$this->load_administration_settings();
// Check if local plugins is adding node to site admin.
$this->load_local_plugin_settings();
$this->initialised = true;
}
}
/**
* Simple class used to output a navigation branch in XML
*
* @package core
* @category navigation
* @copyright 2009 Sam Hemelryk
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class navigation_json {
/** @var array An array of different node types */
protected $nodetype = array('node','branch');
/** @var array An array of node keys and types */
protected $expandable = array();
/**
* Turns a branch and all of its children into XML
*
* @param navigation_node $branch
* @return string XML string
*/
public function convert($branch) {
$xml = $this->convert_child($branch);
return $xml;
}
/**
* Set the expandable items in the array so that we have enough information
* to attach AJAX events
* @param array $expandable
*/
public function set_expandable($expandable) {
foreach ($expandable as $node) {
$this->expandable[$node['key'].':'.$node['type']] = $node;
}
}
/**
* Recusively converts a child node and its children to XML for output
*
* @param navigation_node $child The child to convert
* @param int $depth Pointlessly used to track the depth of the XML structure
* @return string JSON
*/
protected function convert_child($child, $depth=1) {
if (!$child->display) {
return '';
}
$attributes = array();
$attributes['id'] = $child->id;
$attributes['name'] = (string)$child->text; // This can be lang_string object so typecast it.
$attributes['type'] = $child->type;
$attributes['key'] = $child->key;
$attributes['class'] = $child->get_css_type();
$attributes['requiresajaxloading'] = $child->requiresajaxloading;
if ($child->icon instanceof pix_icon) {
$attributes['icon'] = array(
'component' => $child->icon->component,
'pix' => $child->icon->pix,
);
foreach ($child->icon->attributes as $key=>$value) {
if ($key == 'class') {
$attributes['icon']['classes'] = explode(' ', $value);
} else if (!array_key_exists($key, $attributes['icon'])) {
$attributes['icon'][$key] = $value;
}
}
} else if (!empty($child->icon)) {
$attributes['icon'] = (string)$child->icon;
}
if ($child->forcetitle || $child->title !== $child->text) {
$attributes['title'] = htmlentities($child->title, ENT_QUOTES, 'UTF-8');
}
if (array_key_exists($child->key.':'.$child->type, $this->expandable)) {
$attributes['expandable'] = $child->key;
$child->add_class($this->expandable[$child->key.':'.$child->type]['id']);
}
if (count($child->classes)>0) {
$attributes['class'] .= ' '.join(' ',$child->classes);
}
if (is_string($child->action)) {
$attributes['link'] = $child->action;
} else if ($child->action instanceof moodle_url) {
$attributes['link'] = $child->action->out();
} else if ($child->action instanceof action_link) {
$attributes['link'] = $child->action->url->out();
}
$attributes['hidden'] = ($child->hidden);
$attributes['haschildren'] = ($child->children->count()>0 || $child->type == navigation_node::TYPE_CATEGORY);
$attributes['haschildren'] = $attributes['haschildren'] || $child->type == navigation_node::TYPE_MY_CATEGORY;
if ($child->children->count() > 0) {
$attributes['children'] = array();
foreach ($child->children as $subchild) {
$attributes['children'][] = $this->convert_child($subchild, $depth+1);
}
}
if ($depth > 1) {
return $attributes;
} else {
return json_encode($attributes);
}
}
}
/**
* The cache class used by global navigation and settings navigation.
*
* It is basically an easy access point to session with a bit of smarts to make
* sure that the information that is cached is valid still.
*
* Example use:
* <code php>
* if (!$cache->viewdiscussion()) {
* // Code to do stuff and produce cachable content
* $cache->viewdiscussion = has_capability('mod/forum:viewdiscussion', $coursecontext);
* }
* $content = $cache->viewdiscussion;
* </code>
*
* @package core
* @category navigation
* @copyright 2009 Sam Hemelryk
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class navigation_cache {
/** @var int represents the time created */
protected $creation;
/** @var array An array of session keys */
protected $session;
/**
* The string to use to segregate this particular cache. It can either be
* unique to start a fresh cache or if you want to share a cache then make
* it the string used in the original cache.
* @var string
*/
protected $area;
/** @var int a time that the information will time out */
protected $timeout;
/** @var stdClass The current context */
protected $currentcontext;
/** @var int cache time information */
const CACHETIME = 0;
/** @var int cache user id */
const CACHEUSERID = 1;
/** @var int cache value */
const CACHEVALUE = 2;
/** @var null|array An array of navigation cache areas to expire on shutdown */
public static $volatilecaches;
/**
* Contructor for the cache. Requires two arguments
*
* @param string $area The string to use to segregate this particular cache
* it can either be unique to start a fresh cache or if you want
* to share a cache then make it the string used in the original
* cache
* @param int $timeout The number of seconds to time the information out after
*/
public function __construct($area, $timeout=1800) {
$this->creation = time();
$this->area = $area;
$this->timeout = time() - $timeout;
if (rand(0,100) === 0) {
$this->garbage_collection();
}
}
/**
* Used to set up the cache within the SESSION.
*
* This is called for each access and ensure that we don't put anything into the session before
* it is required.
*/
protected function ensure_session_cache_initialised() {
global $SESSION;
if (empty($this->session)) {
if (!isset($SESSION->navcache)) {
$SESSION->navcache = new stdClass;
}
if (!isset($SESSION->navcache->{$this->area})) {
$SESSION->navcache->{$this->area} = array();
}
$this->session = &$SESSION->navcache->{$this->area}; // pointer to array, =& is correct here
}
}
/**
* Magic Method to retrieve something by simply calling using = cache->key
*
* @param mixed $key The identifier for the information you want out again
* @return void|mixed Either void or what ever was put in
*/
public function __get($key) {
if (!$this->cached($key)) {
return;
}
$information = $this->session[$key][self::CACHEVALUE];
return unserialize($information);
}
/**
* Magic method that simply uses {@link set();} to store something in the cache
*
* @param string|int $key
* @param mixed $information
*/
public function __set($key, $information) {
$this->set($key, $information);
}
/**
* Sets some information against the cache (session) for later retrieval
*
* @param string|int $key
* @param mixed $information
*/
public function set($key, $information) {
global $USER;
$this->ensure_session_cache_initialised();
$information = serialize($information);
$this->session[$key]= array(self::CACHETIME=>time(), self::CACHEUSERID=>$USER->id, self::CACHEVALUE=>$information);
}
/**
* Check the existence of the identifier in the cache
*
* @param string|int $key
* @return bool
*/
public function cached($key) {
global $USER;
$this->ensure_session_cache_initialised();
if (!array_key_exists($key, $this->session) || !is_array($this->session[$key]) || $this->session[$key][self::CACHEUSERID]!=$USER->id || $this->session[$key][self::CACHETIME] < $this->timeout) {
return false;
}
return true;
}
/**
* Compare something to it's equivilant in the cache
*
* @param string $key
* @param mixed $value
* @param bool $serialise Whether to serialise the value before comparison
* this should only be set to false if the value is already
* serialised
* @return bool If the value is the same false if it is not set or doesn't match
*/
public function compare($key, $value, $serialise = true) {
if ($this->cached($key)) {
if ($serialise) {
$value = serialize($value);
}
if ($this->session[$key][self::CACHEVALUE] === $value) {
return true;
}
}
return false;
}
/**
* Wipes the entire cache, good to force regeneration
*/
public function clear() {
global $SESSION;
unset($SESSION->navcache);
$this->session = null;
}
/**
* Checks all cache entries and removes any that have expired, good ole cleanup
*/
protected function garbage_collection() {
if (empty($this->session)) {
return true;
}
foreach ($this->session as $key=>$cachedinfo) {
if (is_array($cachedinfo) && $cachedinfo[self::CACHETIME]<$this->timeout) {
unset($this->session[$key]);
}
}
}
/**
* Marks the cache as being volatile (likely to change)
*
* Any caches marked as volatile will be destroyed at the on shutdown by
* {@link navigation_node::destroy_volatile_caches()} which is registered
* as a shutdown function if any caches are marked as volatile.
*
* @param bool $setting True to destroy the cache false not too
*/
public function volatile($setting = true) {
if (self::$volatilecaches===null) {
self::$volatilecaches = array();
core_shutdown_manager::register_function(array('navigation_cache','destroy_volatile_caches'));
}
if ($setting) {
self::$volatilecaches[$this->area] = $this->area;
} else if (array_key_exists($this->area, self::$volatilecaches)) {
unset(self::$volatilecaches[$this->area]);
}
}
/**
* Destroys all caches marked as volatile
*
* This function is static and works in conjunction with the static volatilecaches
* property of navigation cache.
* Because this function is static it manually resets the cached areas back to an
* empty array.
*/
public static function destroy_volatile_caches() {
global $SESSION;
if (is_array(self::$volatilecaches) && count(self::$volatilecaches)>0) {
foreach (self::$volatilecaches as $area) {
$SESSION->navcache->{$area} = array();
}
} else {
$SESSION->navcache = new stdClass;
}
}
}