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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/>.
/**
* Base class for course format plugins
*
* @package core_course
* @copyright 2012 Marina Glancy
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die;
/**
* Returns an instance of format class (extending format_base) for given course
*
* @param int|stdClass $courseorid either course id or
* an object that has the property 'format' and may contain property 'id'
* @return format_base
*/
function course_get_format($courseorid) {
return format_base::instance($courseorid);
}
/**
* Base class for course formats
*
* Each course format must declare class
* class format_FORMATNAME extends format_base {}
* in file lib.php
*
* For each course just one instance of this class is created and it will always be returned by
* course_get_format($courseorid). Format may store it's specific course-dependent options in
* variables of this class.
*
* In rare cases instance of child class may be created just for format without course id
* i.e. to check if format supports AJAX.
*
* Also course formats may extend class section_info and overwrite
* format_base::build_section_cache() to return more information about sections.
*
* If you are upgrading from Moodle 2.3 start with copying the class format_legacy and renaming
* it to format_FORMATNAME, then move the code from your callback functions into
* appropriate functions of the class.
*
* @package core_course
* @copyright 2012 Marina Glancy
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
abstract class format_base {
/** @var int Id of the course in this instance (maybe 0) */
protected $courseid;
/** @var string format used for this course. Please note that it can be different from
* course.format field if course referes to non-existing of disabled format */
protected $format;
/** @var stdClass data for course object, please use {@link format_base::get_course()} */
protected $course = false;
/** @var array caches format options, please use {@link format_base::get_format_options()} */
protected $formatoptions = array();
/** @var array cached instances */
private static $instances = array();
/** @var array plugin name => class name. */
private static $classesforformat = array('site' => 'site');
/**
* Creates a new instance of class
*
* Please use {@link course_get_format($courseorid)} to get an instance of the format class
*
* @param string $format
* @param int $courseid
* @return format_base
*/
protected function __construct($format, $courseid) {
$this->format = $format;
$this->courseid = $courseid;
}
/**
* Validates that course format exists and enabled and returns either itself or default format
*
* @param string $format
* @return string
*/
protected static final function get_format_or_default($format) {
global $CFG;
require_once($CFG->dirroot . '/course/lib.php');
if (array_key_exists($format, self::$classesforformat)) {
return self::$classesforformat[$format];
}
$plugins = get_sorted_course_formats();
foreach ($plugins as $plugin) {
self::$classesforformat[$plugin] = $plugin;
}
if (array_key_exists($format, self::$classesforformat)) {
return self::$classesforformat[$format];
}
if (PHPUNIT_TEST && class_exists('format_' . $format)) {
// Allow unittests to use non-existing course formats.
return $format;
}
// Else return default format
$defaultformat = get_config('moodlecourse', 'format');
if (!in_array($defaultformat, $plugins)) {
// when default format is not set correctly, use the first available format
$defaultformat = reset($plugins);
}
debugging('Format plugin format_'.$format.' is not found. Using default format_'.$defaultformat, DEBUG_DEVELOPER);
self::$classesforformat[$format] = $defaultformat;
return $defaultformat;
}
/**
* Get class name for the format
*
* If course format xxx does not declare class format_xxx, format_legacy will be returned.
* This function also includes lib.php file from corresponding format plugin
*
* @param string $format
* @return string
*/
protected static final function get_class_name($format) {
global $CFG;
static $classnames = array('site' => 'format_site');
if (!isset($classnames[$format])) {
$plugins = core_component::get_plugin_list('format');
$usedformat = self::get_format_or_default($format);
if (isset($plugins[$usedformat]) && file_exists($plugins[$usedformat].'/lib.php')) {
require_once($plugins[$usedformat].'/lib.php');
}
$classnames[$format] = 'format_'. $usedformat;
if (!class_exists($classnames[$format])) {
require_once($CFG->dirroot.'/course/format/formatlegacy.php');
$classnames[$format] = 'format_legacy';
}
}
return $classnames[$format];
}
/**
* Returns an instance of the class
*
* @todo MDL-35727 use MUC for caching of instances, limit the number of cached instances
*
* @param int|stdClass $courseorid either course id or
* an object that has the property 'format' and may contain property 'id'
* @return format_base
*/
public static final function instance($courseorid) {
global $DB;
if (!is_object($courseorid)) {
$courseid = (int)$courseorid;
if ($courseid && isset(self::$instances[$courseid]) && count(self::$instances[$courseid]) == 1) {
$formats = array_keys(self::$instances[$courseid]);
$format = reset($formats);
} else {
$format = $DB->get_field('course', 'format', array('id' => $courseid), MUST_EXIST);
}
} else {
$format = $courseorid->format;
if (isset($courseorid->id)) {
$courseid = clean_param($courseorid->id, PARAM_INT);
} else {
$courseid = 0;
}
}
// validate that format exists and enabled, use default otherwise
$format = self::get_format_or_default($format);
if (!isset(self::$instances[$courseid][$format])) {
$classname = self::get_class_name($format);
self::$instances[$courseid][$format] = new $classname($format, $courseid);
}
return self::$instances[$courseid][$format];
}
/**
* Resets cache for the course (or all caches)
* To be called from {@link rebuild_course_cache()}
*
* @param int $courseid
*/
public static final function reset_course_cache($courseid = 0) {
if ($courseid) {
if (isset(self::$instances[$courseid])) {
foreach (self::$instances[$courseid] as $format => $object) {
// in case somebody keeps the reference to course format object
self::$instances[$courseid][$format]->course = false;
self::$instances[$courseid][$format]->formatoptions = array();
}
unset(self::$instances[$courseid]);
}
} else {
self::$instances = array();
}
}
/**
* Returns the format name used by this course
*
* @return string
*/
public final function get_format() {
return $this->format;
}
/**
* Returns id of the course (0 if course is not specified)
*
* @return int
*/
public final function get_courseid() {
return $this->courseid;
}
/**
* Returns a record from course database table plus additional fields
* that course format defines
*
* @return stdClass
*/
public function get_course() {
global $DB;
if (!$this->courseid) {
return null;
}
if ($this->course === false) {
$this->course = get_course($this->courseid);
$options = $this->get_format_options();
$dbcoursecolumns = null;
foreach ($options as $optionname => $optionvalue) {
if (isset($this->course->$optionname)) {
// Course format options must not have the same names as existing columns in db table "course".
if (!isset($dbcoursecolumns)) {
$dbcoursecolumns = $DB->get_columns('course');
}
if (isset($dbcoursecolumns[$optionname])) {
debugging('The option name '.$optionname.' in course format '.$this->format.
' is invalid because the field with the same name exists in {course} table',
DEBUG_DEVELOPER);
continue;
}
}
$this->course->$optionname = $optionvalue;
}
}
return $this->course;
}
/**
* Method used in the rendered and during backup instead of legacy 'numsections'
*
* Default renderer will treat sections with sectionnumber greater that the value returned by this
* method as "orphaned" and not display them on the course page unless in editing mode.
* Backup will store this value as 'numsections'.
*
* This method ensures that 3rd party course format plugins that still use 'numsections' continue to
* work but at the same time we no longer expect formats to have 'numsections' property.
*
* @return int
*/
public function get_last_section_number() {
$course = $this->get_course();
if (isset($course->numsections)) {
return $course->numsections;
}
$modinfo = get_fast_modinfo($course);
$sections = $modinfo->get_section_info_all();
return (int)max(array_keys($sections));
}
/**
* Method used to get the maximum number of sections for this course format.
* @return int
*/
public function get_max_sections() {
$maxsections = get_config('moodlecourse', 'maxsections');
if (!isset($maxsections) || !is_numeric($maxsections)) {
$maxsections = 52;
}
return $maxsections;
}
/**
* Returns true if the course has a front page.
*
* This function is called to determine if the course has a view page, whether or not
* it contains a listing of activities. It can be useful to set this to false when the course
* format has only one activity and ignores the course page. Or if there are multiple
* activities but no page to see the centralised information.
*
* Initially this was created to know if forms should add a button to return to the course page.
* So if 'Return to course' does not make sense in your format your should probably return false.
*
* @return boolean
* @since Moodle 2.6
*/
public function has_view_page() {
return true;
}
/**
* Returns true if this course format uses sections
*
* This function may be called without specifying the course id
* i.e. in {@link course_format_uses_sections()}
*
* Developers, note that if course format does use sections there should be defined a language
* string with the name 'sectionname' defining what the section relates to in the format, i.e.
* $string['sectionname'] = 'Topic';
* or
* $string['sectionname'] = 'Week';
*
* @return bool
*/
public function uses_sections() {
return false;
}
/**
* Returns a list of sections used in the course
*
* This is a shortcut to get_fast_modinfo()->get_section_info_all()
* @see get_fast_modinfo()
* @see course_modinfo::get_section_info_all()
*
* @return array of section_info objects
*/
public final function get_sections() {
if ($course = $this->get_course()) {
$modinfo = get_fast_modinfo($course);
return $modinfo->get_section_info_all();
}
return array();
}
/**
* Returns information about section used in course
*
* @param int|stdClass $section either section number (field course_section.section) or row from course_section table
* @param int $strictness
* @return section_info
*/
public final function get_section($section, $strictness = IGNORE_MISSING) {
if (is_object($section)) {
$sectionnum = $section->section;
} else {
$sectionnum = $section;
}
$sections = $this->get_sections();
if (array_key_exists($sectionnum, $sections)) {
return $sections[$sectionnum];
}
if ($strictness == MUST_EXIST) {
throw new moodle_exception('sectionnotexist');
}
return null;
}
/**
* Returns the display name of the given section that the course prefers.
*
* @param int|stdClass $section Section object from database or just field course_sections.section
* @return Display name that the course format prefers, e.g. "Topic 2"
*/
public function get_section_name($section) {
if (is_object($section)) {
$sectionnum = $section->section;
} else {
$sectionnum = $section;
}
if (get_string_manager()->string_exists('sectionname', 'format_' . $this->format)) {
return get_string('sectionname', 'format_' . $this->format) . ' ' . $sectionnum;
}
// Return an empty string if there's no available section name string for the given format.
return '';
}
/**
* Returns the default section using format_base's implementation of get_section_name.
*
* @param int|stdClass $section Section object from database or just field course_sections section
* @return string The default value for the section name based on the given course format.
*/
public function get_default_section_name($section) {
return self::get_section_name($section);
}
/**
* Returns the information about the ajax support in the given source format
*
* The returned object's property (boolean)capable indicates that
* the course format supports Moodle course ajax features.
*
* @return stdClass
*/
public function supports_ajax() {
// no support by default
$ajaxsupport = new stdClass();
$ajaxsupport->capable = false;
return $ajaxsupport;
}
/**
* Custom action after section has been moved in AJAX mode
*
* Used in course/rest.php
*
* @return array This will be passed in ajax respose
*/
public function ajax_section_move() {
return null;
}
/**
* The URL to use for the specified course (with section)
*
* Please note that course view page /course/view.php?id=COURSEID is hardcoded in many
* places in core and contributed modules. If course format wants to change the location
* of the view script, it is not enough to change just this function. Do not forget
* to add proper redirection.
*
* @param int|stdClass $section Section object from database or just field course_sections.section
* if null the course view page is returned
* @param array $options options for view URL. At the moment core uses:
* 'navigation' (bool) if true and section has no separate page, the function returns null
* 'sr' (int) used by multipage formats to specify to which section to return
* @return null|moodle_url
*/
public function get_view_url($section, $options = array()) {
global $CFG;
$course = $this->get_course();
$url = new moodle_url('/course/view.php', array('id' => $course->id));
if (array_key_exists('sr', $options)) {
$sectionno = $options['sr'];
} else if (is_object($section)) {
$sectionno = $section->section;
} else {
$sectionno = $section;
}
if (empty($CFG->linkcoursesections) && !empty($options['navigation']) && $sectionno !== null) {
// by default assume that sections are never displayed on separate pages
return null;
}
if ($this->uses_sections() && $sectionno !== null) {
$url->set_anchor('section-'.$sectionno);
}
return $url;
}
/**
* Loads all of the course sections into the navigation
*
* This method is called from {@link global_navigation::load_course_sections()}
*
* By default the method {@link global_navigation::load_generic_course_sections()} is called
*
* When overwriting please note that navigationlib relies on using the correct values for
* arguments $type and $key in {@link navigation_node::add()}
*
* Example of code creating a section node:
* $sectionnode = $node->add($sectionname, $url, navigation_node::TYPE_SECTION, null, $section->id);
* $sectionnode->nodetype = navigation_node::NODETYPE_BRANCH;
*
* Example of code creating an activity node:
* $activitynode = $sectionnode->add($activityname, $action, navigation_node::TYPE_ACTIVITY, null, $activity->id, $icon);
* if (global_navigation::module_extends_navigation($activity->modname)) {
* $activitynode->nodetype = navigation_node::NODETYPE_BRANCH;
* } else {
* $activitynode->nodetype = navigation_node::NODETYPE_LEAF;
* }
*
* Also note that if $navigation->includesectionnum is not null, the section with this relative
* number needs is expected to be loaded
*
* @param global_navigation $navigation
* @param navigation_node $node The course node within the navigation
*/
public function extend_course_navigation($navigation, navigation_node $node) {
if ($course = $this->get_course()) {
$navigation->load_generic_course_sections($course, $node);
}
return array();
}
/**
* Returns the list of blocks to be automatically added for the newly created course
*
* @see blocks_add_default_course_blocks()
*
* @return array of default blocks, must contain two keys BLOCK_POS_LEFT and BLOCK_POS_RIGHT
* each of values is an array of block names (for left and right side columns)
*/
public function get_default_blocks() {
global $CFG;
if (isset($CFG->defaultblocks)) {
return blocks_parse_default_blocks_list($CFG->defaultblocks);
}
$blocknames = array(
BLOCK_POS_LEFT => array(),
BLOCK_POS_RIGHT => array()
);
return $blocknames;
}
/**
* Returns the localised name of this course format plugin
*
* @return lang_string
*/
public final function get_format_name() {
return new lang_string('pluginname', 'format_'.$this->get_format());
}
/**
* Definitions of the additional options that this course format uses for course
*
* This function may be called often, it should be as fast as possible.
* Avoid using get_string() method, use "new lang_string()" instead
* It is not recommended to use dynamic or course-dependant expressions here
* This function may be also called when course does not exist yet.
*
* Option names must be different from fields in the {course} talbe or any form elements on
* course edit form, it may even make sence to use special prefix for them.
*
* Each option must have the option name as a key and the array of properties as a value:
* 'default' - default value for this option (assumed null if not specified)
* 'type' - type of the option value (PARAM_INT, PARAM_RAW, etc.)
*
* Additional properties used by default implementation of
* {@link format_base::create_edit_form_elements()} (calls this method with $foreditform = true)
* 'label' - localised human-readable label for the edit form
* 'element_type' - type of the form element, default 'text'
* 'element_attributes' - additional attributes for the form element, these are 4th and further
* arguments in the moodleform::addElement() method
* 'help' - string for help button. Note that if 'help' value is 'myoption' then the string with
* the name 'myoption_help' must exist in the language file
* 'help_component' - language component to look for help string, by default this the component
* for this course format
*
* This is an interface for creating simple form elements. If format plugin wants to use other
* methods such as disableIf, it can be done by overriding create_edit_form_elements().
*
* Course format options can be accessed as:
* $this->get_course()->OPTIONNAME (inside the format class)
* course_get_format($course)->get_course()->OPTIONNAME (outside of format class)
*
* All course options are returned by calling:
* $this->get_format_options();
*
* @param bool $foreditform
* @return array of options
*/
public function course_format_options($foreditform = false) {
return array();
}
/**
* Definitions of the additional options that this course format uses for section
*
* See {@link format_base::course_format_options()} for return array definition.
*
* Additionally section format options may have property 'cache' set to true
* if this option needs to be cached in {@link get_fast_modinfo()}. The 'cache' property
* is recommended to be set only for fields used in {@link format_base::get_section_name()},
* {@link format_base::extend_course_navigation()} and {@link format_base::get_view_url()}
*
* For better performance cached options are recommended to have 'cachedefault' property
* Unlike 'default', 'cachedefault' should be static and not access get_config().
*
* Regardless of value of 'cache' all options are accessed in the code as
* $sectioninfo->OPTIONNAME
* where $sectioninfo is instance of section_info, returned by
* get_fast_modinfo($course)->get_section_info($sectionnum)
* or get_fast_modinfo($course)->get_section_info_all()
*
* All format options for particular section are returned by calling:
* $this->get_format_options($section);
*
* @param bool $foreditform
* @return array
*/
public function section_format_options($foreditform = false) {
return array();
}
/**
* Returns the format options stored for this course or course section
*
* When overriding please note that this function is called from rebuild_course_cache()
* and section_info object, therefore using of get_fast_modinfo() and/or any function that
* accesses it may lead to recursion.
*
* @param null|int|stdClass|section_info $section if null the course format options will be returned
* otherwise options for specified section will be returned. This can be either
* section object or relative section number (field course_sections.section)
* @return array
*/
public function get_format_options($section = null) {
global $DB;
if ($section === null) {
$options = $this->course_format_options();
} else {
$options = $this->section_format_options();
}
if (empty($options)) {
// there are no option for course/sections anyway, no need to go further
return array();
}
if ($section === null) {
// course format options will be returned
$sectionid = 0;
} else if ($this->courseid && isset($section->id)) {
// course section format options will be returned
$sectionid = $section->id;
} else if ($this->courseid && is_int($section) &&
($sectionobj = $DB->get_record('course_sections',
array('section' => $section, 'course' => $this->courseid), 'id'))) {
// course section format options will be returned
$sectionid = $sectionobj->id;
} else {
// non-existing (yet) section was passed as an argument
// default format options for course section will be returned
$sectionid = -1;
}
if (!array_key_exists($sectionid, $this->formatoptions)) {
$this->formatoptions[$sectionid] = array();
// first fill with default values
foreach ($options as $optionname => $optionparams) {
$this->formatoptions[$sectionid][$optionname] = null;
if (array_key_exists('default', $optionparams)) {
$this->formatoptions[$sectionid][$optionname] = $optionparams['default'];
}
}
if ($this->courseid && $sectionid !== -1) {
// overwrite the default options values with those stored in course_format_options table
// nothing can be stored if we are interested in generic course ($this->courseid == 0)
// or generic section ($sectionid === 0)
$records = $DB->get_records('course_format_options',
array('courseid' => $this->courseid,
'format' => $this->format,
'sectionid' => $sectionid
), '', 'id,name,value');
foreach ($records as $record) {
if (array_key_exists($record->name, $this->formatoptions[$sectionid])) {
$value = $record->value;
if ($value !== null && isset($options[$record->name]['type'])) {
// this will convert string value to number if needed
$value = clean_param($value, $options[$record->name]['type']);
}
$this->formatoptions[$sectionid][$record->name] = $value;
}
}
}
}
return $this->formatoptions[$sectionid];
}
/**
* Adds format options elements to the course/section edit form
*
* This function is called from {@link course_edit_form::definition_after_data()}
*
* @param MoodleQuickForm $mform form the elements are added to
* @param bool $forsection 'true' if this is a section edit form, 'false' if this is course edit form
* @return array array of references to the added form elements
*/
public function create_edit_form_elements(&$mform, $forsection = false) {
$elements = array();
if ($forsection) {
$options = $this->section_format_options(true);
} else {
$options = $this->course_format_options(true);
}
foreach ($options as $optionname => $option) {
if (!isset($option['element_type'])) {
$option['element_type'] = 'text';
}
$args = array($option['element_type'], $optionname, $option['label']);
if (!empty($option['element_attributes'])) {
$args = array_merge($args, $option['element_attributes']);
}
$elements[] = call_user_func_array(array($mform, 'addElement'), $args);
if (isset($option['help'])) {
$helpcomponent = 'format_'. $this->get_format();
if (isset($option['help_component'])) {
$helpcomponent = $option['help_component'];
}
$mform->addHelpButton($optionname, $option['help'], $helpcomponent);
}
if (isset($option['type'])) {
$mform->setType($optionname, $option['type']);
}
if (isset($option['default']) && !array_key_exists($optionname, $mform->_defaultValues)) {
// Set defaults for the elements in the form.
// Since we call this method after set_data() make sure that we don't override what was already set.
$mform->setDefault($optionname, $option['default']);
}
}
if (!$forsection && empty($this->courseid)) {
// Check if course end date form field should be enabled by default.
// If a default date is provided to the form element, it is magically enabled by default in the
// MoodleQuickForm_date_time_selector class, otherwise it's disabled by default.
if (get_config('moodlecourse', 'courseenddateenabled')) {
// At this stage (this is called from definition_after_data) course data is already set as default.
// We can not overwrite what is in the database.
$mform->setDefault('enddate', $this->get_default_course_enddate($mform));
}
}
return $elements;
}
/**
* Override if you need to perform some extra validation of the format options
*
* @param array $data array of ("fieldname"=>value) of submitted data
* @param array $files array of uploaded files "element_name"=>tmp_file_path
* @param array $errors errors already discovered in edit form validation
* @return array of "element_name"=>"error_description" if there are errors,
* or an empty array if everything is OK.
* Do not repeat errors from $errors param here
*/
public function edit_form_validation($data, $files, $errors) {
return array();
}
/**
* Prepares values of course or section format options before storing them in DB
*
* If an option has invalid value it is not returned
*
* @param array $rawdata associative array of the proposed course/section format options
* @param int|null $sectionid null if it is course format option
* @return array array of options that have valid values
*/
protected function validate_format_options(array $rawdata, int $sectionid = null) : array {
if (!$sectionid) {
$allformatoptions = $this->course_format_options(true);
} else {
$allformatoptions = $this->section_format_options(true);
}
$data = array_intersect_key($rawdata, $allformatoptions);
foreach ($data as $key => $value) {
$option = $allformatoptions[$key] + ['type' => PARAM_RAW, 'element_type' => null, 'element_attributes' => [[]]];
$data[$key] = clean_param($value, $option['type']);
if ($option['element_type'] === 'select' && !array_key_exists($data[$key], $option['element_attributes'][0])) {
// Value invalid for select element, skip.
unset($data[$key]);
}
}
return $data;
}
/**
* Validates format options for the course
*
* @param array $data data to insert/update
* @return array array of options that have valid values
*/
public function validate_course_format_options(array $data) : array {
return $this->validate_format_options($data);
}
/**
* Updates format options for a course or section
*
* If $data does not contain property with the option name, the option will not be updated
*
* @param stdClass|array $data return value from {@link moodleform::get_data()} or array with data
* @param null|int null if these are options for course or section id (course_sections.id)
* if these are options for section
* @return bool whether there were any changes to the options values
*/
protected function update_format_options($data, $sectionid = null) {
global $DB;
$data = $this->validate_format_options((array)$data, $sectionid);
if (!$sectionid) {
$allformatoptions = $this->course_format_options();
$sectionid = 0;
} else {
$allformatoptions = $this->section_format_options();
}
if (empty($allformatoptions)) {
// nothing to update anyway
return false;
}
$defaultoptions = array();
$cached = array();
foreach ($allformatoptions as $key => $option) {
$defaultoptions[$key] = null;
if (array_key_exists('default', $option)) {
$defaultoptions[$key] = $option['default'];
}
$cached[$key] = ($sectionid === 0 || !empty($option['cache']));
}
$records = $DB->get_records('course_format_options',
array('courseid' => $this->courseid,
'format' => $this->format,
'sectionid' => $sectionid
), '', 'name,id,value');
$changed = $needrebuild = false;
foreach ($defaultoptions as $key => $value) {
if (isset($records[$key])) {
if (array_key_exists($key, $data) && $records[$key]->value !== $data[$key]) {
$DB->set_field('course_format_options', 'value',
$data[$key], array('id' => $records[$key]->id));
$changed = true;
$needrebuild = $needrebuild || $cached[$key];
}
} else {
if (array_key_exists($key, $data) && $data[$key] !== $value) {
$newvalue = $data[$key];
$changed = true;
$needrebuild = $needrebuild || $cached[$key];
} else {
$newvalue = $value;
// we still insert entry in DB but there are no changes from user point of
// view and no need to call rebuild_course_cache()
}
$DB->insert_record('course_format_options', array(
'courseid' => $this->courseid,
'format' => $this->format,
'sectionid' => $sectionid,
'name' => $key,
'value' => $newvalue
));
}
}
if ($needrebuild) {
rebuild_course_cache($this->courseid, true);
}
if ($changed) {
// reset internal caches
if (!$sectionid) {
$this->course = false;
}
unset($this->formatoptions[$sectionid]);
}
return $changed;
}
/**
* Updates format options for a course
*
* If $data does not contain property with the option name, the option will not be updated
*
* @param stdClass|array $data return value from {@link moodleform::get_data()} or array with data
* @param stdClass $oldcourse if this function is called from {@link update_course()}
* this object contains information about the course before update
* @return bool whether there were any changes to the options values
*/
public function update_course_format_options($data, $oldcourse = null) {
return $this->update_format_options($data);
}
/**
* Updates format options for a section
*
* Section id is expected in $data->id (or $data['id'])
* If $data does not contain property with the option name, the option will not be updated
*
* @param stdClass|array $data return value from {@link moodleform::get_data()} or array with data
* @return bool whether there were any changes to the options values
*/
public function update_section_format_options($data) {
$data = (array)$data;
return $this->update_format_options($data, $data['id']);
}
/**
* Return an instance of moodleform to edit a specified section
*
* Default implementation returns instance of editsection_form that automatically adds
* additional fields defined in {@link format_base::section_format_options()}
*
* Format plugins may extend editsection_form if they want to have custom edit section form.
*
* @param mixed $action the action attribute for the form. If empty defaults to auto detect the
* current url. If a moodle_url object then outputs params as hidden variables.
* @param array $customdata the array with custom data to be passed to the form
* /course/editsection.php passes section_info object in 'cs' field
* for filling availability fields
* @return moodleform
*/
public function editsection_form($action, $customdata = array()) {
global $CFG;
require_once($CFG->dirroot. '/course/editsection_form.php');
$context = context_course::instance($this->courseid);
if (!array_key_exists('course', $customdata)) {
$customdata['course'] = $this->get_course();
}
return new editsection_form($action, $customdata);
}
/**
* Allows course format to execute code on moodle_page::set_course()
*
* @param moodle_page $page instance of page calling set_course
*/
public function page_set_course(moodle_page $page) {
}
/**
* Allows course format to execute code on moodle_page::set_cm()
*
* Current module can be accessed as $page->cm (returns instance of cm_info)
*
* @param moodle_page $page instance of page calling set_cm
*/
public function page_set_cm(moodle_page $page) {
}
/**
* Course-specific information to be output on any course page (usually above navigation bar)
*
* Example of usage:
* define
* class format_FORMATNAME_XXX implements renderable {}
*
* create format renderer in course/format/FORMATNAME/renderer.php, define rendering function:
* class format_FORMATNAME_renderer extends plugin_renderer_base {
* protected function render_format_FORMATNAME_XXX(format_FORMATNAME_XXX $xxx) {
* return html_writer::tag('div', 'This is my header/footer');
* }
* }
*
* Return instance of format_FORMATNAME_XXX in this function, the appropriate method from
* plugin renderer will be called
*
* @return null|renderable null for no output or object with data for plugin renderer
*/
public function course_header() {
return null;
}
/**
* Course-specific information to be output on any course page (usually in the beginning of
* standard footer)
*
* See {@link format_base::course_header()} for usage
*
* @return null|renderable null for no output or object with data for plugin renderer
*/
public function course_footer() {
return null;
}
/**
* Course-specific information to be output immediately above content on any course page
*
* See {@link format_base::course_header()} for usage
*
* @return null|renderable null for no output or object with data for plugin renderer
*/
public function course_content_header() {
return null;
}
/**
* Course-specific information to be output immediately below content on any course page
*
* See {@link format_base::course_header()} for usage
*
* @return null|renderable null for no output or object with data for plugin renderer
*/
public function course_content_footer() {
return null;
}
/**
* Returns instance of page renderer used by this plugin
*
* @param moodle_page $page
* @return renderer_base
*/
public function get_renderer(moodle_page $page) {
return $page->get_renderer('format_'. $this->get_format());
}
/**
* Returns true if the specified section is current
*
* By default we analyze $course->marker
*
* @param int|stdClass|section_info $section
* @return bool
*/
public function is_section_current($section) {
if (is_object($section)) {
$sectionnum = $section->section;
} else {
$sectionnum = $section;
}
return ($sectionnum && ($course = $this->get_course()) && $course->marker == $sectionnum);
}
/**
* Allows to specify for modinfo that section is not available even when it is visible and conditionally available.
*
* Note: affected user can be retrieved as: $section->modinfo->userid
*
* Course format plugins can override the method to change the properties $available and $availableinfo that were
* calculated by conditional availability.
* To make section unavailable set:
* $available = false;
* To make unavailable section completely hidden set:
* $availableinfo = '';
* To make unavailable section visible with availability message set:
* $availableinfo = get_string('sectionhidden', 'format_xxx');
*
* @param section_info $section
* @param bool $available the 'available' propery of the section_info as it was evaluated by conditional availability.
* Can be changed by the method but 'false' can not be overridden by 'true'.
* @param string $availableinfo the 'availableinfo' propery of the section_info as it was evaluated by conditional availability.
* Can be changed by the method
*/
public function section_get_available_hook(section_info $section, &$available, &$availableinfo) {
}
/**
* Whether this format allows to delete sections
*
* If format supports deleting sections it is also recommended to define language string
* 'deletesection' inside the format.
*
* Do not call this function directly, instead use {@link course_can_delete_section()}
*
* @param int|stdClass|section_info $section
* @return bool
*/
public function can_delete_section($section) {
return false;
}
/**
* Deletes a section
*
* Do not call this function directly, instead call {@link course_delete_section()}
*
* @param int|stdClass|section_info $section
* @param bool $forcedeleteifnotempty if set to false section will not be deleted if it has modules in it.
* @return bool whether section was deleted
*/
public function delete_section($section, $forcedeleteifnotempty = false) {
global $DB;
if (!$this->uses_sections()) {
// Not possible to delete section if sections are not used.
return false;
}
if (!is_object($section)) {
$section = $DB->get_record('course_sections', array('course' => $this->get_courseid(), 'section' => $section),
'id,section,sequence,summary');
}
if (!$section || !$section->section) {
// Not possible to delete 0-section.
return false;
}
if (!$forcedeleteifnotempty && (!empty($section->sequence) || !empty($section->summary))) {
return false;
}
$course = $this->get_course();
// Remove the marker if it points to this section.
if ($section->section == $course->marker) {
course_set_marker($course->id, 0);
}
$lastsection = $DB->get_field_sql('SELECT max(section) from {course_sections}
WHERE course = ?', array($course->id));
// Find out if we need to descrease the 'numsections' property later.
$courseformathasnumsections = array_key_exists('numsections',
$this->get_format_options());
$decreasenumsections = $courseformathasnumsections && ($section->section <= $course->numsections);
// Move the section to the end.
move_section_to($course, $section->section, $lastsection, true);
// Delete all modules from the section.
foreach (preg_split('/,/', $section->sequence, -1, PREG_SPLIT_NO_EMPTY) as $cmid) {
course_delete_module($cmid);
}
// Delete section and it's format options.
$DB->delete_records('course_format_options', array('sectionid' => $section->id));
$DB->delete_records('course_sections', array('id' => $section->id));
rebuild_course_cache($course->id, true);
// Delete section summary files.
$context = \context_course::instance($course->id);
$fs = get_file_storage();
$fs->delete_area_files($context->id, 'course', 'section', $section->id);
// Descrease 'numsections' if needed.
if ($decreasenumsections) {
$this->update_course_format_options(array('numsections' => $course->numsections - 1));
}
return true;
}
/**
* Prepares the templateable object to display section name
*
* @param \section_info|\stdClass $section
* @param bool $linkifneeded
* @param bool $editable
* @param null|lang_string|string $edithint
* @param null|lang_string|string $editlabel
* @return \core\output\inplace_editable
*/
public function inplace_editable_render_section_name($section, $linkifneeded = true,
$editable = null, $edithint = null, $editlabel = null) {
global $USER, $CFG;
require_once($CFG->dirroot.'/course/lib.php');
if ($editable === null) {
$editable = !empty($USER->editing) && has_capability('moodle/course:update',
context_course::instance($section->course));
}
$displayvalue = $title = get_section_name($section->course, $section);
if ($linkifneeded) {
// Display link under the section name if the course format setting is to display one section per page.
$url = course_get_url($section->course, $section->section, array('navigation' => true));
if ($url) {
$displayvalue = html_writer::link($url, $title);
}
$itemtype = 'sectionname';
} else {
// If $linkifneeded==false, we never display the link (this is used when rendering the section header).
// Itemtype 'sectionnamenl' (nl=no link) will tell the callback that link should not be rendered -
// there is no other way callback can know where we display the section name.
$itemtype = 'sectionnamenl';
}
if (empty($edithint)) {
$edithint = new lang_string('editsectionname');
}
if (empty($editlabel)) {
$editlabel = new lang_string('newsectionname', '', $title);
}
return new \core\output\inplace_editable('format_' . $this->format, $itemtype, $section->id, $editable,
$displayvalue, $section->name, $edithint, $editlabel);
}
/**
* Updates the value in the database and modifies this object respectively.
*
* ALWAYS check user permissions before performing an update! Throw exceptions if permissions are not sufficient
* or value is not legit.
*
* @param stdClass $section
* @param string $itemtype
* @param mixed $newvalue
* @return \core\output\inplace_editable
*/
public function inplace_editable_update_section_name($section, $itemtype, $newvalue) {
if ($itemtype === 'sectionname' || $itemtype === 'sectionnamenl') {
$context = context_course::instance($section->course);
external_api::validate_context($context);
require_capability('moodle/course:update', $context);
$newtitle = clean_param($newvalue, PARAM_TEXT);
if (strval($section->name) !== strval($newtitle)) {
course_update_section($section->course, $section, array('name' => $newtitle));
}
return $this->inplace_editable_render_section_name($section, ($itemtype === 'sectionname'), true);
}
}
/**
* Returns the default end date value based on the start date.
*
* This is the default implementation for course formats, it is based on
* moodlecourse/courseduration setting. Course formats like format_weeks for
* example can overwrite this method and return a value based on their internal options.
*
* @param moodleform $mform
* @param array $fieldnames The form - field names mapping.
* @return int
*/
public function get_default_course_enddate($mform, $fieldnames = array()) {
if (empty($fieldnames)) {
$fieldnames = array('startdate' => 'startdate');
}
$startdate = $this->get_form_start_date($mform, $fieldnames);
$courseduration = intval(get_config('moodlecourse', 'courseduration'));
if (!$courseduration) {
// Default, it should be already set during upgrade though.
$courseduration = YEARSECS;
}
return $startdate + $courseduration;
}
/**
* Indicates whether the course format supports the creation of the Announcements forum.
*
* For course format plugin developers, please override this to return true if you want the Announcements forum
* to be created upon course creation.
*
* @return bool
*/
public function supports_news() {
// For backwards compatibility, check if default blocks include the news_items block.
$defaultblocks = $this->get_default_blocks();
foreach ($defaultblocks as $blocks) {
if (in_array('news_items', $blocks)) {
return true;
}
}
// Return false by default.
return false;
}
/**
* Get the start date value from the course settings page form.
*
* @param moodleform $mform
* @param array $fieldnames The form - field names mapping.
* @return int
*/
protected function get_form_start_date($mform, $fieldnames) {
$startdate = $mform->getElementValue($fieldnames['startdate']);
return $mform->getElement($fieldnames['startdate'])->exportValue($startdate);
}
/**
* Returns whether this course format allows the activity to
* have "triple visibility state" - visible always, hidden on course page but available, hidden.
*
* @param stdClass|cm_info $cm course module (may be null if we are displaying a form for adding a module)
* @param stdClass|section_info $section section where this module is located or will be added to
* @return bool
*/
public function allow_stealth_module_visibility($cm, $section) {
return false;
}
/**
* Callback used in WS core_course_edit_section when teacher performs an AJAX action on a section (show/hide)
*
* Access to the course is already validated in the WS but the callback has to make sure
* that particular action is allowed by checking capabilities
*
* Course formats should register
*
* @param stdClass|section_info $section
* @param string $action
* @param int $sr
* @return null|array|stdClass any data for the Javascript post-processor (must be json-encodeable)
*/
public function section_action($section, $action, $sr) {
global $PAGE;
if (!$this->uses_sections() || !$section->section) {
// No section actions are allowed if course format does not support sections.
// No actions are allowed on the 0-section by default (overwrite in course format if needed).
throw new moodle_exception('sectionactionnotsupported', 'core', null, s($action));
}
$course = $this->get_course();
$coursecontext = context_course::instance($course->id);
switch($action) {
case 'hide':
case 'show':
require_capability('moodle/course:sectionvisibility', $coursecontext);
$visible = ($action === 'hide') ? 0 : 1;
course_update_section($course, $section, array('visible' => $visible));
break;
default:
throw new moodle_exception('sectionactionnotsupported', 'core', null, s($action));
}
$modules = [];
$modinfo = get_fast_modinfo($course);
$coursesections = $modinfo->sections;
if (array_key_exists($section->section, $coursesections)) {
$courserenderer = $PAGE->get_renderer('core', 'course');
$completioninfo = new completion_info($course);
foreach ($coursesections[$section->section] as $cmid) {
$cm = $modinfo->get_cm($cmid);
$modules[] = $courserenderer->course_section_cm_list_item($course, $completioninfo, $cm, $sr);
}
}
return ['modules' => $modules];
}
/**
* Return the plugin config settings for external functions,
* in some cases the configs will need formatting or be returned only if the current user has some capabilities enabled.
*
* @return array the list of configs
* @since Moodle 3.5
*/
public function get_config_for_external() {
return array();
}
}
/**
* Pseudo course format used for the site main page
*
* @package core_course
* @copyright 2012 Marina Glancy
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class format_site extends format_base {
/**
* Returns the display name of the given section that the course prefers.
*
* @param int|stdClass $section Section object from database or just field section.section
* @return Display name that the course format prefers, e.g. "Topic 2"
*/
function get_section_name($section) {
return get_string('site');
}
/**
* For this fake course referring to the whole site, the site homepage is always returned
* regardless of arguments
*
* @param int|stdClass $section
* @param array $options
* @return null|moodle_url
*/
public function get_view_url($section, $options = array()) {
return new moodle_url('/', array('redirect' => 0));
}
/**
* Returns the list of blocks to be automatically added on the site frontpage when moodle is installed
*
* @return array of default blocks, must contain two keys BLOCK_POS_LEFT and BLOCK_POS_RIGHT
* each of values is an array of block names (for left and right side columns)
*/
public function get_default_blocks() {
return blocks_get_default_site_course_blocks();
}
/**
* Definitions of the additional options that site uses
*
* @param bool $foreditform
* @return array of options
*/
public function course_format_options($foreditform = false) {
static $courseformatoptions = false;
if ($courseformatoptions === false) {
$courseformatoptions = array(
'numsections' => array(
'default' => 1,
'type' => PARAM_INT,
),
);
}
return $courseformatoptions;
}
/**
* Returns whether this course format allows the activity to
* have "triple visibility state" - visible always, hidden on course page but available, hidden.
*
* @param stdClass|cm_info $cm course module (may be null if we are displaying a form for adding a module)
* @param stdClass|section_info $section section where this module is located or will be added to
* @return bool
*/
public function allow_stealth_module_visibility($cm, $section) {
return true;
}
}