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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 repository plugins in Moodle
*
* @since Moodle 2.0
* @package core_repository
* @copyright 2009 Dongsheng Cai {@link http://dongsheng.org}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
require_once($CFG->libdir . '/filelib.php');
require_once($CFG->libdir . '/formslib.php');
define('FILE_EXTERNAL', 1);
define('FILE_INTERNAL', 2);
define('FILE_REFERENCE', 4);
define('FILE_CONTROLLED_LINK', 8);
define('RENAME_SUFFIX', '_2');
/**
* This class is used to manage repository plugins
*
* A repository_type is a repository plug-in. It can be Box.net, Flick-r, ...
* A repository type can be edited, sorted and hidden. It is mandatory for an
* administrator to create a repository type in order to be able to create
* some instances of this type.
* Coding note:
* - a repository_type object is mapped to the "repository" database table
* - "typename" attibut maps the "type" database field. It is unique.
* - general "options" for a repository type are saved in the config_plugin table
* - when you delete a repository, all instances are deleted, and general
* options are also deleted from database
* - When you create a type for a plugin that can't have multiple instances, a
* instance is automatically created.
*
* @package core_repository
* @copyright 2009 Jerome Mouneyrac
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class repository_type implements cacheable_object {
/**
* Type name (no whitespace) - A type name is unique
* Note: for a user-friendly type name see get_readablename()
* @var String
*/
private $_typename;
/**
* Options of this type
* They are general options that any instance of this type would share
* e.g. API key
* These options are saved in config_plugin table
* @var array
*/
private $_options;
/**
* Is the repository type visible or hidden
* If false (hidden): no instances can be created, edited, deleted, showned , used...
* @var boolean
*/
private $_visible;
/**
* 0 => not ordered, 1 => first position, 2 => second position...
* A not order type would appear in first position (should never happened)
* @var integer
*/
private $_sortorder;
/**
* Return if the instance is visible in a context
*
* @todo check if the context visibility has been overwritten by the plugin creator
* (need to create special functions to be overvwritten in repository class)
* @param stdClass $context context
* @return bool
*/
public function get_contextvisibility($context) {
global $USER;
if ($context->contextlevel == CONTEXT_COURSE) {
return $this->_options['enablecourseinstances'];
}
if ($context->contextlevel == CONTEXT_USER) {
return $this->_options['enableuserinstances'];
}
//the context is SITE
return true;
}
/**
* repository_type constructor
*
* @param int $typename
* @param array $typeoptions
* @param bool $visible
* @param int $sortorder (don't really need set, it will be during create() call)
*/
public function __construct($typename = '', $typeoptions = array(), $visible = true, $sortorder = 0) {
global $CFG;
//set type attributs
$this->_typename = $typename;
$this->_visible = $visible;
$this->_sortorder = $sortorder;
//set options attribut
$this->_options = array();
$options = repository::static_function($typename, 'get_type_option_names');
//check that the type can be setup
if (!empty($options)) {
//set the type options
foreach ($options as $config) {
if (array_key_exists($config, $typeoptions)) {
$this->_options[$config] = $typeoptions[$config];
}
}
}
//retrieve visibility from option
if (array_key_exists('enablecourseinstances',$typeoptions)) {
$this->_options['enablecourseinstances'] = $typeoptions['enablecourseinstances'];
} else {
$this->_options['enablecourseinstances'] = 0;
}
if (array_key_exists('enableuserinstances',$typeoptions)) {
$this->_options['enableuserinstances'] = $typeoptions['enableuserinstances'];
} else {
$this->_options['enableuserinstances'] = 0;
}
}
/**
* Get the type name (no whitespace)
* For a human readable name, use get_readablename()
*
* @return string the type name
*/
public function get_typename() {
return $this->_typename;
}
/**
* Return a human readable and user-friendly type name
*
* @return string user-friendly type name
*/
public function get_readablename() {
return get_string('pluginname','repository_'.$this->_typename);
}
/**
* Return general options
*
* @return array the general options
*/
public function get_options() {
return $this->_options;
}
/**
* Return visibility
*
* @return bool
*/
public function get_visible() {
return $this->_visible;
}
/**
* Return order / position of display in the file picker
*
* @return int
*/
public function get_sortorder() {
return $this->_sortorder;
}
/**
* Create a repository type (the type name must not already exist)
* @param bool $silent throw exception?
* @return mixed return int if create successfully, return false if
*/
public function create($silent = false) {
global $DB;
//check that $type has been set
$timmedtype = trim($this->_typename);
if (empty($timmedtype)) {
throw new repository_exception('emptytype', 'repository');
}
//set sortorder as the last position in the list
if (!isset($this->_sortorder) || $this->_sortorder == 0 ) {
$sql = "SELECT MAX(sortorder) FROM {repository}";
$this->_sortorder = 1 + $DB->get_field_sql($sql);
}
//only create a new type if it doesn't already exist
$existingtype = $DB->get_record('repository', array('type'=>$this->_typename));
if (!$existingtype) {
//create the type
$newtype = new stdClass();
$newtype->type = $this->_typename;
$newtype->visible = $this->_visible;
$newtype->sortorder = $this->_sortorder;
$plugin_id = $DB->insert_record('repository', $newtype);
//save the options in DB
$this->update_options();
$instanceoptionnames = repository::static_function($this->_typename, 'get_instance_option_names');
//if the plugin type has no multiple instance (e.g. has no instance option name) so it wont
//be possible for the administrator to create a instance
//in this case we need to create an instance
if (empty($instanceoptionnames)) {
$instanceoptions = array();
if (empty($this->_options['pluginname'])) {
// when moodle trying to install some repo plugin automatically
// this option will be empty, get it from language string when display
$instanceoptions['name'] = '';
} else {
// when admin trying to add a plugin manually, he will type a name
// for it
$instanceoptions['name'] = $this->_options['pluginname'];
}
repository::static_function($this->_typename, 'create', $this->_typename, 0, context_system::instance(), $instanceoptions);
}
//run plugin_init function
if (!repository::static_function($this->_typename, 'plugin_init')) {
$this->update_visibility(false);
if (!$silent) {
throw new repository_exception('cannotinitplugin', 'repository');
}
}
cache::make('core', 'repositories')->purge();
if(!empty($plugin_id)) {
// return plugin_id if create successfully
return $plugin_id;
} else {
return false;
}
} else {
if (!$silent) {
throw new repository_exception('existingrepository', 'repository');
}
// If plugin existed, return false, tell caller no new plugins were created.
return false;
}
}
/**
* Update plugin options into the config_plugin table
*
* @param array $options
* @return bool
*/
public function update_options($options = null) {
global $DB;
$classname = 'repository_' . $this->_typename;
$instanceoptions = repository::static_function($this->_typename, 'get_instance_option_names');
if (empty($instanceoptions)) {
// update repository instance name if this plugin type doesn't have muliti instances
$params = array();
$params['type'] = $this->_typename;
$instances = repository::get_instances($params);
$instance = array_pop($instances);
if ($instance) {
$DB->set_field('repository_instances', 'name', $options['pluginname'], array('id'=>$instance->id));
}
unset($options['pluginname']);
}
if (!empty($options)) {
$this->_options = $options;
}
foreach ($this->_options as $name => $value) {
set_config($name, $value, $this->_typename);
}
cache::make('core', 'repositories')->purge();
return true;
}
/**
* Update visible database field with the value given as parameter
* or with the visible value of this object
* This function is private.
* For public access, have a look to switch_and_update_visibility()
*
* @param bool $visible
* @return bool
*/
private function update_visible($visible = null) {
global $DB;
if (!empty($visible)) {
$this->_visible = $visible;
}
else if (!isset($this->_visible)) {
throw new repository_exception('updateemptyvisible', 'repository');
}
cache::make('core', 'repositories')->purge();
return $DB->set_field('repository', 'visible', $this->_visible, array('type'=>$this->_typename));
}
/**
* Update database sortorder field with the value given as parameter
* or with the sortorder value of this object
* This function is private.
* For public access, have a look to move_order()
*
* @param int $sortorder
* @return bool
*/
private function update_sortorder($sortorder = null) {
global $DB;
if (!empty($sortorder) && $sortorder!=0) {
$this->_sortorder = $sortorder;
}
//if sortorder is not set, we set it as the ;ast position in the list
else if (!isset($this->_sortorder) || $this->_sortorder == 0 ) {
$sql = "SELECT MAX(sortorder) FROM {repository}";
$this->_sortorder = 1 + $DB->get_field_sql($sql);
}
cache::make('core', 'repositories')->purge();
return $DB->set_field('repository', 'sortorder', $this->_sortorder, array('type'=>$this->_typename));
}
/**
* Change order of the type with its adjacent upper or downer type
* (database fields are updated)
* Algorithm details:
* 1. retrieve all types in an array. This array is sorted by sortorder,
* and the array keys start from 0 to X (incremented by 1)
* 2. switch sortorder values of this type and its adjacent type
*
* @param string $move "up" or "down"
*/
public function move_order($move) {
global $DB;
$types = repository::get_types(); // retrieve all types
// retrieve this type into the returned array
$i = 0;
while (!isset($indice) && $i<count($types)) {
if ($types[$i]->get_typename() == $this->_typename) {
$indice = $i;
}
$i++;
}
// retrieve adjacent indice
switch ($move) {
case "up":
$adjacentindice = $indice - 1;
break;
case "down":
$adjacentindice = $indice + 1;
break;
default:
throw new repository_exception('movenotdefined', 'repository');
}
//switch sortorder of this type and the adjacent type
//TODO: we could reset sortorder for all types. This is not as good in performance term, but
//that prevent from wrong behaviour on a screwed database. As performance are not important in this particular case
//it worth to change the algo.
if ($adjacentindice>=0 && !empty($types[$adjacentindice])) {
$DB->set_field('repository', 'sortorder', $this->_sortorder, array('type'=>$types[$adjacentindice]->get_typename()));
$this->update_sortorder($types[$adjacentindice]->get_sortorder());
}
}
/**
* 1. Change visibility to the value chosen
* 2. Update the type
*
* @param bool $visible
* @return bool
*/
public function update_visibility($visible = null) {
if (is_bool($visible)) {
$this->_visible = $visible;
} else {
$this->_visible = !$this->_visible;
}
return $this->update_visible();
}
/**
* Delete a repository_type (general options are removed from config_plugin
* table, and all instances are deleted)
*
* @param bool $downloadcontents download external contents if exist
* @return bool
*/
public function delete($downloadcontents = false) {
global $DB;
//delete all instances of this type
$params = array();
$params['context'] = array();
$params['onlyvisible'] = false;
$params['type'] = $this->_typename;
$instances = repository::get_instances($params);
foreach ($instances as $instance) {
$instance->delete($downloadcontents);
}
//delete all general options
foreach ($this->_options as $name => $value) {
set_config($name, null, $this->_typename);
}
cache::make('core', 'repositories')->purge();
try {
$DB->delete_records('repository', array('type' => $this->_typename));
} catch (dml_exception $ex) {
return false;
}
return true;
}
/**
* Prepares the repository type to be cached. Implements method from cacheable_object interface.
*
* @return array
*/
public function prepare_to_cache() {
return array(
'typename' => $this->_typename,
'typeoptions' => $this->_options,
'visible' => $this->_visible,
'sortorder' => $this->_sortorder
);
}
/**
* Restores repository type from cache. Implements method from cacheable_object interface.
*
* @return array
*/
public static function wake_from_cache($data) {
return new repository_type($data['typename'], $data['typeoptions'], $data['visible'], $data['sortorder']);
}
}
/**
* This is the base class of the repository class.
*
* To create repository plugin, see: {@link http://docs.moodle.org/dev/Repository_plugins}
* See an example: {@link repository_boxnet}
*
* @package core_repository
* @copyright 2009 Dongsheng Cai {@link http://dongsheng.org}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
abstract class repository implements cacheable_object {
/**
* Timeout in seconds for downloading the external file into moodle
* @deprecated since Moodle 2.7, please use $CFG->repositorygetfiletimeout instead
*/
const GETFILE_TIMEOUT = 30;
/**
* Timeout in seconds for syncronising the external file size
* @deprecated since Moodle 2.7, please use $CFG->repositorysyncfiletimeout instead
*/
const SYNCFILE_TIMEOUT = 1;
/**
* Timeout in seconds for downloading an image file from external repository during syncronisation
* @deprecated since Moodle 2.7, please use $CFG->repositorysyncimagetimeout instead
*/
const SYNCIMAGE_TIMEOUT = 3;
// $disabled can be set to true to disable a plugin by force
// example: self::$disabled = true
/** @var bool force disable repository instance */
public $disabled = false;
/** @var int repository instance id */
public $id;
/** @var stdClass current context */
public $context;
/** @var array repository options */
public $options;
/** @var bool Whether or not the repository instance is editable */
public $readonly;
/** @var int return types */
public $returntypes;
/** @var stdClass repository instance database record */
public $instance;
/** @var string Type of repository (webdav, google_docs, dropbox, ...). Read from $this->get_typename(). */
protected $typename;
/**
* Constructor
*
* @param int $repositoryid repository instance id
* @param int|stdClass $context a context id or context object
* @param array $options repository options
* @param int $readonly indicate this repo is readonly or not
*/
public function __construct($repositoryid, $context = SYSCONTEXTID, $options = array(), $readonly = 0) {
global $DB;
$this->id = $repositoryid;
if (is_object($context)) {
$this->context = $context;
} else {
$this->context = context::instance_by_id($context);
}
$cache = cache::make('core', 'repositories');
if (($this->instance = $cache->get('i:'. $this->id)) === false) {
$this->instance = $DB->get_record_sql("SELECT i.*, r.type AS repositorytype, r.sortorder, r.visible
FROM {repository} r, {repository_instances} i
WHERE i.typeid = r.id and i.id = ?", array('id' => $this->id));
$cache->set('i:'. $this->id, $this->instance);
}
$this->readonly = $readonly;
$this->options = array();
if (is_array($options)) {
// The get_option() method will get stored options in database.
$options = array_merge($this->get_option(), $options);
} else {
$options = $this->get_option();
}
foreach ($options as $n => $v) {
$this->options[$n] = $v;
}
$this->name = $this->get_name();
$this->returntypes = $this->supported_returntypes();
$this->super_called = true;
}
/**
* Get repository instance using repository id
*
* Note that this function does not check permission to access repository contents
*
* @throws repository_exception
*
* @param int $repositoryid repository instance ID
* @param context|int $context context instance or context ID where this repository will be used
* @param array $options additional repository options
* @return repository
*/
public static function get_repository_by_id($repositoryid, $context, $options = array()) {
global $CFG, $DB;
$cache = cache::make('core', 'repositories');
if (!is_object($context)) {
$context = context::instance_by_id($context);
}
$cachekey = 'rep:'. $repositoryid. ':'. $context->id. ':'. serialize($options);
if ($repository = $cache->get($cachekey)) {
return $repository;
}
if (!$record = $cache->get('i:'. $repositoryid)) {
$sql = "SELECT i.*, r.type AS repositorytype, r.visible, r.sortorder
FROM {repository_instances} i
JOIN {repository} r ON r.id = i.typeid
WHERE i.id = ?";
if (!$record = $DB->get_record_sql($sql, array($repositoryid))) {
throw new repository_exception('invalidrepositoryid', 'repository');
}
$cache->set('i:'. $record->id, $record);
}
$type = $record->repositorytype;
if (file_exists($CFG->dirroot . "/repository/$type/lib.php")) {
require_once($CFG->dirroot . "/repository/$type/lib.php");
$classname = 'repository_' . $type;
$options['type'] = $type;
$options['typeid'] = $record->typeid;
$options['visible'] = $record->visible;
if (empty($options['name'])) {
$options['name'] = $record->name;
}
$repository = new $classname($repositoryid, $context, $options, $record->readonly);
if (empty($repository->super_called)) {
// to make sure the super construct is called
debugging('parent::__construct must be called by '.$type.' plugin.');
}
$cache->set($cachekey, $repository);
return $repository;
} else {
throw new repository_exception('invalidplugin', 'repository');
}
}
/**
* Returns the type name of the repository.
*
* @return string type name of the repository.
* @since Moodle 2.5
*/
public function get_typename() {
if (empty($this->typename)) {
$matches = array();
if (!preg_match("/^repository_(.*)$/", get_class($this), $matches)) {
throw new coding_exception('The class name of a repository should be repository_<typeofrepository>, '.
'e.g. repository_dropbox');
}
$this->typename = $matches[1];
}
return $this->typename;
}
/**
* Get a repository type object by a given type name.
*
* @static
* @param string $typename the repository type name
* @return repository_type|bool
*/
public static function get_type_by_typename($typename) {
global $DB;
$cache = cache::make('core', 'repositories');
if (($repositorytype = $cache->get('typename:'. $typename)) === false) {
$repositorytype = null;
if ($record = $DB->get_record('repository', array('type' => $typename))) {
$repositorytype = new repository_type($record->type, (array)get_config($record->type), $record->visible, $record->sortorder);
$cache->set('typeid:'. $record->id, $repositorytype);
}
$cache->set('typename:'. $typename, $repositorytype);
}
return $repositorytype;
}
/**
* Get the repository type by a given repository type id.
*
* @static
* @param int $id the type id
* @return object
*/
public static function get_type_by_id($id) {
global $DB;
$cache = cache::make('core', 'repositories');
if (($repositorytype = $cache->get('typeid:'. $id)) === false) {
$repositorytype = null;
if ($record = $DB->get_record('repository', array('id' => $id))) {
$repositorytype = new repository_type($record->type, (array)get_config($record->type), $record->visible, $record->sortorder);
$cache->set('typename:'. $record->type, $repositorytype);
}
$cache->set('typeid:'. $id, $repositorytype);
}
return $repositorytype;
}
/**
* Return all repository types ordered by sortorder field
* first repository type in returnedarray[0], second repository type in returnedarray[1], ...
*
* @static
* @param bool $visible can return types by visiblity, return all types if null
* @return array Repository types
*/
public static function get_types($visible=null) {
global $DB, $CFG;
$cache = cache::make('core', 'repositories');
if (!$visible) {
$typesnames = $cache->get('types');
} else {
$typesnames = $cache->get('typesvis');
}
$types = array();
if ($typesnames === false) {
$typesnames = array();
$vistypesnames = array();
if ($records = $DB->get_records('repository', null ,'sortorder')) {
foreach($records as $type) {
if (($repositorytype = $cache->get('typename:'. $type->type)) === false) {
// Create new instance of repository_type.
if (file_exists($CFG->dirroot . '/repository/'. $type->type .'/lib.php')) {
$repositorytype = new repository_type($type->type, (array)get_config($type->type), $type->visible, $type->sortorder);
$cache->set('typeid:'. $type->id, $repositorytype);
$cache->set('typename:'. $type->type, $repositorytype);
}
}
if ($repositorytype) {
if (empty($visible) || $repositorytype->get_visible()) {
$types[] = $repositorytype;
$vistypesnames[] = $repositorytype->get_typename();
}
$typesnames[] = $repositorytype->get_typename();
}
}
}
$cache->set('types', $typesnames);
$cache->set('typesvis', $vistypesnames);
} else {
foreach ($typesnames as $typename) {
$types[] = self::get_type_by_typename($typename);
}
}
return $types;
}
/**
* Checks if user has a capability to view the current repository.
*
* @return bool true when the user can, otherwise throws an exception.
* @throws repository_exception when the user does not meet the requirements.
*/
public final function check_capability() {
global $USER;
// The context we are on.
$currentcontext = $this->context;
// Ensure that the user can view the repository in the current context.
$can = has_capability('repository/'.$this->get_typename().':view', $currentcontext);
// Context in which the repository has been created.
$repocontext = context::instance_by_id($this->instance->contextid);
// Prevent access to private repositories when logged in as.
if ($can && \core\session\manager::is_loggedinas()) {
if ($this->contains_private_data() || $repocontext->contextlevel == CONTEXT_USER) {
$can = false;
}
}
// We are going to ensure that the current context was legit, and reliable to check
// the capability against. (No need to do that if we already cannot).
if ($can) {
if ($repocontext->contextlevel == CONTEXT_USER) {
// The repository is a user instance, ensure we're the right user to access it!
if ($repocontext->instanceid != $USER->id) {
$can = false;
}
} else if ($repocontext->contextlevel == CONTEXT_COURSE) {
// The repository is a course one. Let's check that we are on the right course.
if (in_array($currentcontext->contextlevel, array(CONTEXT_COURSE, CONTEXT_MODULE, CONTEXT_BLOCK))) {
$coursecontext = $currentcontext->get_course_context();
if ($coursecontext->instanceid != $repocontext->instanceid) {
$can = false;
}
} else {
// We are on a parent context, therefore it's legit to check the permissions
// in the current context.
}
} else {
// Nothing to check here, system instances can have different permissions on different
// levels. We do not want to prevent URL hack here, because it does not make sense to
// prevent a user to access a repository in a context if it's accessible in another one.
}
}
if ($can) {
return true;
}
throw new repository_exception('nopermissiontoaccess', 'repository');
}
/**
* Check if file already exists in draft area.
*
* @static
* @param int $itemid of the draft area.
* @param string $filepath path to the file.
* @param string $filename file name.
* @return bool
*/
public static function draftfile_exists($itemid, $filepath, $filename) {
global $USER;
$fs = get_file_storage();
$usercontext = context_user::instance($USER->id);
return $fs->file_exists($usercontext->id, 'user', 'draft', $itemid, $filepath, $filename);
}
/**
* Parses the moodle file reference and returns an instance of stored_file
*
* @param string $reference reference to the moodle internal file as retruned by
* {@link repository::get_file_reference()} or {@link file_storage::pack_reference()}
* @return stored_file|null
*/
public static function get_moodle_file($reference) {
$params = file_storage::unpack_reference($reference, true);
$fs = get_file_storage();
return $fs->get_file($params['contextid'], $params['component'], $params['filearea'],
$params['itemid'], $params['filepath'], $params['filename']);
}
/**
* Repository method to make sure that user can access particular file.
*
* This is checked when user tries to pick the file from repository to deal with
* potential parameter substitutions is request
*
* @param string $source source of the file, returned by repository as 'source' and received back from user (not cleaned)
* @return bool whether the file is accessible by current user
*/
public function file_is_accessible($source) {
if ($this->has_moodle_files()) {
$reference = $this->get_file_reference($source);
try {
$params = file_storage::unpack_reference($reference, true);
} catch (file_reference_exception $e) {
return false;
}
$browser = get_file_browser();
$context = context::instance_by_id($params['contextid']);
$file_info = $browser->get_file_info($context, $params['component'], $params['filearea'],
$params['itemid'], $params['filepath'], $params['filename']);
return !empty($file_info);
}
return true;
}
/**
* This function is used to copy a moodle file to draft area.
*
* It DOES NOT check if the user is allowed to access this file because the actual file
* can be located in the area where user does not have access to but there is an alias
* to this file in the area where user CAN access it.
* {@link file_is_accessible} should be called for alias location before calling this function.
*
* @param string $source The metainfo of file, it is base64 encoded php serialized data
* @param stdClass|array $filerecord contains itemid, filepath, filename and optionally other
* attributes of the new file
* @param int $maxbytes maximum allowed size of file, -1 if unlimited. If size of file exceeds
* the limit, the file_exception is thrown.
* @param int $areamaxbytes the maximum size of the area. A file_exception is thrown if the
* new file will reach the limit.
* @return array The information about the created file
*/
public function copy_to_area($source, $filerecord, $maxbytes = -1, $areamaxbytes = FILE_AREA_MAX_BYTES_UNLIMITED) {
global $USER;
$fs = get_file_storage();
if ($this->has_moodle_files() == false) {
throw new coding_exception('Only repository used to browse moodle files can use repository::copy_to_area()');
}
$user_context = context_user::instance($USER->id);
$filerecord = (array)$filerecord;
// make sure the new file will be created in user draft area
$filerecord['component'] = 'user';
$filerecord['filearea'] = 'draft';
$filerecord['contextid'] = $user_context->id;
$draftitemid = $filerecord['itemid'];
$new_filepath = $filerecord['filepath'];
$new_filename = $filerecord['filename'];
// the file needs to copied to draft area
$stored_file = self::get_moodle_file($source);
if ($maxbytes != -1 && $stored_file->get_filesize() > $maxbytes) {
$maxbytesdisplay = display_size($maxbytes);
throw new file_exception('maxbytesfile', (object) array('file' => $filerecord['filename'],
'size' => $maxbytesdisplay));
}
// Validate the size of the draft area.
if (file_is_draft_area_limit_reached($draftitemid, $areamaxbytes, $stored_file->get_filesize())) {
throw new file_exception('maxareabytes');
}
if (repository::draftfile_exists($draftitemid, $new_filepath, $new_filename)) {
// create new file
$unused_filename = repository::get_unused_filename($draftitemid, $new_filepath, $new_filename);
$filerecord['filename'] = $unused_filename;
$fs->create_file_from_storedfile($filerecord, $stored_file);
$event = array();
$event['event'] = 'fileexists';
$event['newfile'] = new stdClass;
$event['newfile']->filepath = $new_filepath;
$event['newfile']->filename = $unused_filename;
$event['newfile']->url = moodle_url::make_draftfile_url($draftitemid, $new_filepath, $unused_filename)->out();
$event['existingfile'] = new stdClass;
$event['existingfile']->filepath = $new_filepath;
$event['existingfile']->filename = $new_filename;
$event['existingfile']->url = moodle_url::make_draftfile_url($draftitemid, $new_filepath, $new_filename)->out();
return $event;
} else {
$fs->create_file_from_storedfile($filerecord, $stored_file);
$info = array();
$info['itemid'] = $draftitemid;
$info['file'] = $new_filename;
$info['title'] = $new_filename;
$info['contextid'] = $user_context->id;
$info['url'] = moodle_url::make_draftfile_url($draftitemid, $new_filepath, $new_filename)->out();
$info['filesize'] = $stored_file->get_filesize();
return $info;
}
}
/**
* Get an unused filename from the current draft area.
*
* Will check if the file ends with ([0-9]) and increase the number.
*
* @static
* @param int $itemid draft item ID.
* @param string $filepath path to the file.
* @param string $filename name of the file.
* @return string an unused file name.
*/
public static function get_unused_filename($itemid, $filepath, $filename) {
global $USER;
$contextid = context_user::instance($USER->id)->id;
$fs = get_file_storage();
return $fs->get_unused_filename($contextid, 'user', 'draft', $itemid, $filepath, $filename);
}
/**
* Append a suffix to filename.
*
* @static
* @param string $filename
* @return string
* @deprecated since 2.5
*/
public static function append_suffix($filename) {
debugging('The function repository::append_suffix() has been deprecated. Use repository::get_unused_filename() instead.',
DEBUG_DEVELOPER);
$pathinfo = pathinfo($filename);
if (empty($pathinfo['extension'])) {
return $filename . RENAME_SUFFIX;
} else {
return $pathinfo['filename'] . RENAME_SUFFIX . '.' . $pathinfo['extension'];
}
}
/**
* Return all types that you a user can create/edit and which are also visible
* Note: Mostly used in order to know if at least one editable type can be set
*
* @static
* @param stdClass $context the context for which we want the editable types
* @return array types
*/
public static function get_editable_types($context = null) {
if (empty($context)) {
$context = context_system::instance();
}
$types= repository::get_types(true);
$editabletypes = array();
foreach ($types as $type) {
$instanceoptionnames = repository::static_function($type->get_typename(), 'get_instance_option_names');
if (!empty($instanceoptionnames)) {
if ($type->get_contextvisibility($context)) {
$editabletypes[]=$type;
}
}
}
return $editabletypes;
}
/**
* Return repository instances
*
* @static
* @param array $args Array containing the following keys:
* currentcontext : instance of context (default system context)
* context : array of instances of context (default empty array)
* onlyvisible : bool (default true)
* type : string return instances of this type only
* accepted_types : string|array return instances that contain files of those types (*, web_image, .pdf, ...)
* return_types : int combination of FILE_INTERNAL & FILE_EXTERNAL & FILE_REFERENCE & FILE_CONTROLLED_LINK.
* 0 means every type. The default is FILE_INTERNAL | FILE_EXTERNAL.
* userid : int if specified, instances belonging to other users will not be returned
*
* @return array repository instances
*/
public static function get_instances($args = array()) {
global $DB, $CFG, $USER;
// Fill $args attributes with default values unless specified
if (!isset($args['currentcontext']) || !($args['currentcontext'] instanceof context)) {
$current_context = context_system::instance();
} else {
$current_context = $args['currentcontext'];
}
$args['currentcontext'] = $current_context->id;
$contextids = array();
if (!empty($args['context'])) {
foreach ($args['context'] as $context) {
$contextids[] = $context->id;
}
}
$args['context'] = $contextids;
if (!isset($args['onlyvisible'])) {
$args['onlyvisible'] = true;
}
if (!isset($args['return_types'])) {
$args['return_types'] = FILE_INTERNAL | FILE_EXTERNAL;
}
if (!isset($args['type'])) {
$args['type'] = null;
}
if (empty($args['disable_types']) || !is_array($args['disable_types'])) {
$args['disable_types'] = null;
}
if (empty($args['userid']) || !is_numeric($args['userid'])) {
$args['userid'] = null;
}
if (!isset($args['accepted_types']) || (is_array($args['accepted_types']) && in_array('*', $args['accepted_types']))) {
$args['accepted_types'] = '*';
}
ksort($args);
$cachekey = 'all:'. serialize($args);
// Check if we have cached list of repositories with the same query
$cache = cache::make('core', 'repositories');
if (($cachedrepositories = $cache->get($cachekey)) !== false) {
// convert from cacheable_object_array to array
$repositories = array();
foreach ($cachedrepositories as $repository) {
$repositories[$repository->id] = $repository;
}
return $repositories;
}
// Prepare DB SQL query to retrieve repositories
$params = array();
$sql = "SELECT i.*, r.type AS repositorytype, r.sortorder, r.visible
FROM {repository} r, {repository_instances} i
WHERE i.typeid = r.id ";
if ($args['disable_types']) {
list($types, $p) = $DB->get_in_or_equal($args['disable_types'], SQL_PARAMS_NAMED, 'distype', false);
$sql .= " AND r.type $types";
$params = array_merge($params, $p);
}
if ($args['userid']) {
$sql .= " AND (i.userid = 0 or i.userid = :userid)";
$params['userid'] = $args['userid'];
}
if ($args['context']) {
list($ctxsql, $p2) = $DB->get_in_or_equal($args['context'], SQL_PARAMS_NAMED, 'ctx');
$sql .= " AND i.contextid $ctxsql";
$params = array_merge($params, $p2);
}
if ($args['onlyvisible'] == true) {
$sql .= " AND r.visible = 1";
}
if ($args['type'] !== null) {
$sql .= " AND r.type = :type";
$params['type'] = $args['type'];
}
$sql .= " ORDER BY r.sortorder, i.name";
if (!$records = $DB->get_records_sql($sql, $params)) {
$records = array();
}
$repositories = array();
// Sortorder should be unique, which is not true if we use $record->sortorder
// and there are multiple instances of any repository type
$sortorder = 1;
foreach ($records as $record) {
$cache->set('i:'. $record->id, $record);
if (!file_exists($CFG->dirroot . '/repository/'. $record->repositorytype.'/lib.php')) {
continue;
}
$repository = self::get_repository_by_id($record->id, $current_context);
$repository->options['sortorder'] = $sortorder++;
$is_supported = true;
// check mimetypes
if ($args['accepted_types'] !== '*' and $repository->supported_filetypes() !== '*') {
$accepted_ext = file_get_typegroup('extension', $args['accepted_types']);
$supported_ext = file_get_typegroup('extension', $repository->supported_filetypes());
$valid_ext = array_intersect($accepted_ext, $supported_ext);
$is_supported = !empty($valid_ext);
}
// Check return values.
if (!empty($args['return_types']) && !($repository->supported_returntypes() & $args['return_types'])) {
$is_supported = false;
}
if (!$args['onlyvisible'] || ($repository->is_visible() && !$repository->disabled)) {
// check capability in current context
$capability = has_capability('repository/'.$record->repositorytype.':view', $current_context);
if ($record->repositorytype == 'coursefiles') {
// coursefiles plugin needs managefiles permission
$capability = $capability && has_capability('moodle/course:managefiles', $current_context);
}
if ($is_supported && $capability) {
$repositories[$repository->id] = $repository;
}
}
}
$cache->set($cachekey, new cacheable_object_array($repositories));
return $repositories;
}
/**
* Get single repository instance for administrative actions
*
* Do not use this function to access repository contents, because it
* does not set the current context
*
* @see repository::get_repository_by_id()
*
* @static
* @param integer $id repository instance id
* @return repository
*/
public static function get_instance($id) {
return self::get_repository_by_id($id, context_system::instance());
}
/**
* Call a static function. Any additional arguments than plugin and function will be passed through.
*
* @static
* @param string $plugin repository plugin name
* @param string $function function name
* @return mixed
*/
public static function static_function($plugin, $function) {
global $CFG;
//check that the plugin exists
$typedirectory = $CFG->dirroot . '/repository/'. $plugin . '/lib.php';
if (!file_exists($typedirectory)) {
//throw new repository_exception('invalidplugin', 'repository');
return false;
}
$args = func_get_args();
if (count($args) <= 2) {
$args = array();
} else {
array_shift($args);
array_shift($args);
}
require_once($typedirectory);
return call_user_func_array(array('repository_' . $plugin, $function), $args);
}
/**
* Scan file, throws exception in case of infected file.
*
* Please note that the scanning engine must be able to access the file,
* permissions of the file are not modified here!
*
* @static
* @deprecated since Moodle 3.0
* @param string $thefile
* @param string $filename name of the file
* @param bool $deleteinfected
*/
public static function antivir_scan_file($thefile, $filename, $deleteinfected) {
debugging('Please upgrade your code to use \core\antivirus\manager::scan_file instead', DEBUG_DEVELOPER);
\core\antivirus\manager::scan_file($thefile, $filename, $deleteinfected);
}
/**
* Repository method to serve the referenced file
*
* @see send_stored_file
*
* @param stored_file $storedfile the file that contains the reference
* @param int $lifetime Number of seconds before the file should expire from caches (null means $CFG->filelifetime)
* @param int $filter 0 (default)=no filtering, 1=all files, 2=html files only
* @param bool $forcedownload If true (default false), forces download of file rather than view in browser/plugin
* @param array $options additional options affecting the file serving
*/
public function send_file($storedfile, $lifetime=null , $filter=0, $forcedownload=false, array $options = null) {
if ($this->has_moodle_files()) {
$fs = get_file_storage();
$params = file_storage::unpack_reference($storedfile->get_reference(), true);
$srcfile = null;
if (is_array($params)) {
$srcfile = $fs->get_file($params['contextid'], $params['component'], $params['filearea'],
$params['itemid'], $params['filepath'], $params['filename']);
}
if (empty($options)) {
$options = array();
}
if (!isset($options['filename'])) {
$options['filename'] = $storedfile->get_filename();
}
if (!$srcfile) {
send_file_not_found();
} else {
send_stored_file($srcfile, $lifetime, $filter, $forcedownload, $options);
}
} else {
throw new coding_exception("Repository plugin must implement send_file() method.");
}
}
/**
* Return human readable reference information
*
* @param string $reference value of DB field files_reference.reference
* @param int $filestatus status of the file, 0 - ok, 666 - source missing
* @return string
*/
public function get_reference_details($reference, $filestatus = 0) {
if ($this->has_moodle_files()) {
$fileinfo = null;
$params = file_storage::unpack_reference($reference, true);
if (is_array($params)) {
$context = context::instance_by_id($params['contextid'], IGNORE_MISSING);
if ($context) {
$browser = get_file_browser();
$fileinfo = $browser->get_file_info($context, $params['component'], $params['filearea'], $params['itemid'], $params['filepath'], $params['filename']);
}
}
if (empty($fileinfo)) {
if ($filestatus == 666) {
if (is_siteadmin() || ($context && has_capability('moodle/course:managefiles', $context))) {
return get_string('lostsource', 'repository',
$params['contextid']. '/'. $params['component']. '/'. $params['filearea']. '/'. $params['itemid']. $params['filepath']. $params['filename']);
} else {
return get_string('lostsource', 'repository', '');
}
}
return get_string('undisclosedsource', 'repository');
} else {
return $fileinfo->get_readable_fullname();
}
}
return '';
}
/**
* Cache file from external repository by reference
* {@link repository::get_file_reference()}
* {@link repository::get_file()}
* Invoked at MOODLE/repository/repository_ajax.php
*
* @param string $reference this reference is generated by
* repository::get_file_reference()
* @param stored_file $storedfile created file reference
*/
public function cache_file_by_reference($reference, $storedfile) {
}
/**
* reference_file_selected
*
* This function is called when a controlled link file is selected in a file picker and the form is
* saved. The expected behaviour for repositories supporting controlled links is to
* - copy the file to the moodle system account
* - put it in a folder that reflects the context it is being used
* - make sure the sharing permissions are correct (read-only with the link)
* - return a new reference string pointing to the newly copied file.
*
* @param string $reference this reference is generated by
* repository::get_file_reference()
* @param context $context the target context for this new file.
* @param string $component the target component for this new file.
* @param string $filearea the target filearea for this new file.
* @param string $itemid the target itemid for this new file.
* @return string updated reference (final one before it's saved to db).
*/
public function reference_file_selected($reference, $context, $component, $filearea, $itemid) {
return $reference;
}
/**
* Return the source information
*
* The result of the function is stored in files.source field. It may be analysed
* when the source file is lost or repository may use it to display human-readable
* location of reference original.
*
* This method is called when file is picked for the first time only. When file
* (either copy or a reference) is already in moodle and it is being picked
* again to another file area (also as a copy or as a reference), the value of
* files.source is copied.
*
* @param string $source source of the file, returned by repository as 'source' and received back from user (not cleaned)
* @return string|null
*/
public function get_file_source_info($source) {
if ($this->has_moodle_files()) {
$reference = $this->get_file_reference($source);
return $this->get_reference_details($reference, 0);
}
return $source;
}
/**
* Move file from download folder to file pool using FILE API
*
* @todo MDL-28637
* @static
* @param string $thefile file path in download folder
* @param stdClass $record
* @return array containing the following keys:
* icon
* file
* id
* url
*/
public static function move_to_filepool($thefile, $record) {
global $DB, $CFG, $USER, $OUTPUT;
// scan for viruses if possible, throws exception if problem found
// TODO: MDL-28637 this repository_no_delete is a bloody hack!
\core\antivirus\manager::scan_file($thefile, $record->filename, empty($CFG->repository_no_delete));
$fs = get_file_storage();
// If file name being used.
if (repository::draftfile_exists($record->itemid, $record->filepath, $record->filename)) {
$draftitemid = $record->itemid;
$new_filename = repository::get_unused_filename($draftitemid, $record->filepath, $record->filename);
$old_filename = $record->filename;
// Create a tmp file.
$record->filename = $new_filename;
$newfile = $fs->create_file_from_pathname($record, $thefile);
$event = array();
$event['event'] = 'fileexists';
$event['newfile'] = new stdClass;
$event['newfile']->filepath = $record->filepath;
$event['newfile']->filename = $new_filename;
$event['newfile']->url = moodle_url::make_draftfile_url($draftitemid, $record->filepath, $new_filename)->out();
$event['existingfile'] = new stdClass;
$event['existingfile']->filepath = $record->filepath;
$event['existingfile']->filename = $old_filename;
$event['existingfile']->url = moodle_url::make_draftfile_url($draftitemid, $record->filepath, $old_filename)->out();
return $event;
}
if ($file = $fs->create_file_from_pathname($record, $thefile)) {
if (empty($CFG->repository_no_delete)) {
$delete = unlink($thefile);
unset($CFG->repository_no_delete);
}
return array(
'url'=>moodle_url::make_draftfile_url($file->get_itemid(), $file->get_filepath(), $file->get_filename())->out(),
'id'=>$file->get_itemid(),
'file'=>$file->get_filename(),
'icon' => $OUTPUT->image_url(file_extension_icon($thefile, 32))->out(),
);
} else {
return null;
}
}
/**
* Builds a tree of files This function is then called recursively.
*
* @static
* @todo take $search into account, and respect a threshold for dynamic loading
* @param file_info $fileinfo an object returned by file_browser::get_file_info()
* @param string $search searched string
* @param bool $dynamicmode no recursive call is done when in dynamic mode
* @param array $list the array containing the files under the passed $fileinfo
* @return int the number of files found
*/
public static function build_tree($fileinfo, $search, $dynamicmode, &$list) {
global $CFG, $OUTPUT;
$filecount = 0;
$children = $fileinfo->get_children();
foreach ($children as $child) {
$filename = $child->get_visible_name();
$filesize = $child->get_filesize();
$filesize = $filesize ? display_size($filesize) : '';
$filedate = $child->get_timemodified();
$filedate = $filedate ? userdate($filedate) : '';
$filetype = $child->get_mimetype();
if ($child->is_directory()) {
$path = array();
$level = $child->get_parent();
while ($level) {
$params = $level->get_params();
$path[] = array($params['filepath'], $level->get_visible_name());
$level = $level->get_parent();
}
$tmp = array(
'title' => $child->get_visible_name(),
'size' => 0,
'date' => $filedate,
'path' => array_reverse($path),
'thumbnail' => $OUTPUT->image_url(file_folder_icon(90))->out(false)
);
//if ($dynamicmode && $child->is_writable()) {
// $tmp['children'] = array();
//} else {
// if folder name matches search, we send back all files contained.
$_search = $search;
if ($search && stristr($tmp['title'], $search) !== false) {
$_search = false;
}
$tmp['children'] = array();
$_filecount = repository::build_tree($child, $_search, $dynamicmode, $tmp['children']);
if ($search && $_filecount) {
$tmp['expanded'] = 1;
}
//}
if (!$search || $_filecount || (stristr($tmp['title'], $search) !== false)) {
$filecount += $_filecount;
$list[] = $tmp;
}
} else { // not a directory
// skip the file, if we're in search mode and it's not a match
if ($search && (stristr($filename, $search) === false)) {
continue;
}
$params = $child->get_params();
$source = serialize(array($params['contextid'], $params['component'], $params['filearea'], $params['itemid'], $params['filepath'], $params['filename']));
$list[] = array(
'title' => $filename,
'size' => $filesize,
'date' => $filedate,
//'source' => $child->get_url(),
'source' => base64_encode($source),
'icon'=>$OUTPUT->image_url(file_file_icon($child, 24))->out(false),
'thumbnail'=>$OUTPUT->image_url(file_file_icon($child, 90))->out(false),
);
$filecount++;
}
}
return $filecount;
}
/**
* Display a repository instance list (with edit/delete/create links)
*
* @static
* @param stdClass $context the context for which we display the instance
* @param string $typename if set, we display only one type of instance
*/
public static function display_instances_list($context, $typename = null) {
global $CFG, $USER, $OUTPUT;
$output = $OUTPUT->box_start('generalbox');
//if the context is SYSTEM, so we call it from administration page
$admin = ($context->id == SYSCONTEXTID) ? true : false;
if ($admin) {
$baseurl = new moodle_url('/'.$CFG->admin.'/repositoryinstance.php', array('sesskey'=>sesskey()));
$output .= $OUTPUT->heading(get_string('siteinstances', 'repository'));
} else {
$baseurl = new moodle_url('/repository/manage_instances.php', array('contextid'=>$context->id, 'sesskey'=>sesskey()));
}
$namestr = get_string('name');
$pluginstr = get_string('plugin', 'repository');
$settingsstr = get_string('settings');
$deletestr = get_string('delete');
// Retrieve list of instances. In administration context we want to display all
// instances of a type, even if this type is not visible. In course/user context we
// want to display only visible instances, but for every type types. The repository::get_instances()
// third parameter displays only visible type.
$params = array();
$params['context'] = array($context);
$params['currentcontext'] = $context;
$params['return_types'] = 0;
$params['onlyvisible'] = !$admin;
$params['type'] = $typename;
$instances = repository::get_instances($params);
$instancesnumber = count($instances);
$alreadyplugins = array();
$table = new html_table();
$table->head = array($namestr, $pluginstr, $settingsstr, $deletestr);
$table->align = array('left', 'left', 'center','center');
$table->data = array();
$updowncount = 1;
foreach ($instances as $i) {
$settings = '';
$delete = '';
$type = repository::get_type_by_id($i->options['typeid']);
if ($type->get_contextvisibility($context)) {
if (!$i->readonly) {
$settingurl = new moodle_url($baseurl);
$settingurl->param('type', $i->options['type']);
$settingurl->param('edit', $i->id);
$settings .= html_writer::link($settingurl, $settingsstr);
$deleteurl = new moodle_url($baseurl);
$deleteurl->param('delete', $i->id);
$deleteurl->param('type', $i->options['type']);
$delete .= html_writer::link($deleteurl, $deletestr);
}
}
$type = repository::get_type_by_id($i->options['typeid']);
$table->data[] = array(format_string($i->name), $type->get_readablename(), $settings, $delete);
//display a grey row if the type is defined as not visible
if (isset($type) && !$type->get_visible()) {
$table->rowclasses[] = 'dimmed_text';
} else {
$table->rowclasses[] = '';
}
if (!in_array($i->name, $alreadyplugins)) {
$alreadyplugins[] = $i->name;
}
}
$output .= html_writer::table($table);
$instancehtml = '<div>';
$addable = 0;
//if no type is set, we can create all type of instance
if (!$typename) {
$instancehtml .= '<h3>';
$instancehtml .= get_string('createrepository', 'repository');
$instancehtml .= '</h3><ul>';
$types = repository::get_editable_types($context);
foreach ($types as $type) {
if (!empty($type) && $type->get_visible()) {
// If the user does not have the permission to view the repository, it won't be displayed in
// the list of instances. Hiding the link to create new instances will prevent the
// user from creating them without being able to find them afterwards, which looks like a bug.
if (!has_capability('repository/'.$type->get_typename().':view', $context)) {
continue;
}
$instanceoptionnames = repository::static_function($type->get_typename(), 'get_instance_option_names');
if (!empty($instanceoptionnames)) {
$baseurl->param('new', $type->get_typename());
$instancehtml .= '<li><a href="'.$baseurl->out().'">'.get_string('createxxinstance', 'repository', get_string('pluginname', 'repository_'.$type->get_typename())). '</a></li>';
$baseurl->remove_params('new');
$addable++;
}
}
}
$instancehtml .= '</ul>';
} else {
$instanceoptionnames = repository::static_function($typename, 'get_instance_option_names');
if (!empty($instanceoptionnames)) { //create a unique type of instance
$addable = 1;
$baseurl->param('new', $typename);
$output .= $OUTPUT->single_button($baseurl, get_string('createinstance', 'repository'), 'get');
$baseurl->remove_params('new');
}
}
if ($addable) {
$instancehtml .= '</div>';
$output .= $instancehtml;
}
$output .= $OUTPUT->box_end();
//print the list + creation links
print($output);
}
/**
* Prepare file reference information
*
* @param string $source source of the file, returned by repository as 'source' and received back from user (not cleaned)
* @return string file reference, ready to be stored
*/
public function get_file_reference($source) {
if ($source && $this->has_moodle_files()) {
$params = @json_decode(base64_decode($source), true);
if (!is_array($params) || empty($params['contextid'])) {
throw new repository_exception('invalidparams', 'repository');
}
$params = array(
'component' => empty($params['component']) ? '' : clean_param($params['component'], PARAM_COMPONENT),
'filearea' => empty($params['filearea']) ? '' : clean_param($params['filearea'], PARAM_AREA),
'itemid' => empty($params['itemid']) ? 0 : clean_param($params['itemid'], PARAM_INT),
'filename' => empty($params['filename']) ? null : clean_param($params['filename'], PARAM_FILE),
'filepath' => empty($params['filepath']) ? null : clean_param($params['filepath'], PARAM_PATH),
'contextid' => clean_param($params['contextid'], PARAM_INT)
);
// Check if context exists.
if (!context::instance_by_id($params['contextid'], IGNORE_MISSING)) {
throw new repository_exception('invalidparams', 'repository');
}
return file_storage::pack_reference($params);
}
return $source;
}
/**
* Get a unique file path in which to save the file.
*
* The filename returned will be removed at the end of the request and
* should not be relied upon to exist in subsequent requests.
*
* @param string $filename file name
* @return file path
*/
public function prepare_file($filename) {
if (empty($filename)) {
$filename = 'file';
}
return sprintf('%s/%s', make_request_directory(), $filename);
}
/**
* Does this repository used to browse moodle files?
*
* @return bool
*/
public function has_moodle_files() {
return false;
}
/**
* Return file URL, for most plugins, the parameter is the original
* url, but some plugins use a file id, so we need this function to
* convert file id to original url.
*
* @param string $url the url of file
* @return string
*/
public function get_link($url) {
return $url;
}
/**
* Downloads a file from external repository and saves it in temp dir
*
* Function get_file() must be implemented by repositories that support returntypes
* FILE_INTERNAL or FILE_REFERENCE. It is invoked to pick up the file and copy it
* to moodle. This function is not called for moodle repositories, the function
* {@link repository::copy_to_area()} is used instead.
*
* This function can be overridden by subclass if the files.reference field contains
* not just URL or if request should be done differently.
*
* @see curl
* @throws file_exception when error occured
*
* @param string $url the content of files.reference field, in this implementaion
* it is asssumed that it contains the string with URL of the file
* @param string $filename filename (without path) to save the downloaded file in the
* temporary directory, if omitted or file already exists the new filename will be generated
* @return array with elements:
* path: internal location of the file
* url: URL to the source (from parameters)
*/
public function get_file($url, $filename = '') {
global $CFG;
$path = $this->prepare_file($filename);
$c = new curl;
$result = $c->download_one($url, null, array('filepath' => $path, 'timeout' => $CFG->repositorygetfiletimeout));
if ($result !== true) {
throw new moodle_exception('errorwhiledownload', 'repository', '', $result);
}
return array('path'=>$path, 'url'=>$url);
}
/**
* Downloads the file from external repository and saves it in moodle filepool.
* This function is different from {@link repository::sync_reference()} because it has
* bigger request timeout and always downloads the content.
*
* This function is invoked when we try to unlink the file from the source and convert
* a reference into a true copy.
*
* @throws exception when file could not be imported
*
* @param stored_file $file
* @param int $maxbytes throw an exception if file size is bigger than $maxbytes (0 means no limit)
*/
public function import_external_file_contents(stored_file $file, $maxbytes = 0) {
if (!$file->is_external_file()) {
// nothing to import if the file is not a reference
return;
} else if ($file->get_repository_id() != $this->id) {
// error
debugging('Repository instance id does not match');
return;
} else if ($this->has_moodle_files()) {
// files that are references to local files are already in moodle filepool
// just validate the size
if ($maxbytes > 0 && $file->get_filesize() > $maxbytes) {
$maxbytesdisplay = display_size($maxbytes);
throw new file_exception('maxbytesfile', (object) array('file' => $file->get_filename(),
'size' => $maxbytesdisplay));
}
return;
} else {
if ($maxbytes > 0 && $file->get_filesize() > $maxbytes) {
// note that stored_file::get_filesize() also calls synchronisation
$maxbytesdisplay = display_size($maxbytes);
throw new file_exception('maxbytesfile', (object) array('file' => $file->get_filename(),
'size' => $maxbytesdisplay));
}
$fs = get_file_storage();
// If a file has been downloaded, the file record should report both a positive file
// size, and a contenthash which does not related to empty content.
// If thereis no file size, or the contenthash is for an empty file, then the file has
// yet to be successfully downloaded.
$contentexists = $file->get_filesize() && !$file->compare_to_string('');
if (!$file->get_status() && $contentexists) {
// we already have the content in moodle filepool and it was synchronised recently.
// Repositories may overwrite it if they want to force synchronisation anyway!
return;
} else {
// attempt to get a file
try {
$fileinfo = $this->get_file($file->get_reference());
if (isset($fileinfo['path'])) {
$file->set_synchronised_content_from_file($fileinfo['path']);
} else {
throw new moodle_exception('errorwhiledownload', 'repository', '', '');
}
} catch (Exception $e) {
if ($contentexists) {
// better something than nothing. We have a copy of file. It's sync time
// has expired but it is still very likely that it is the last version
} else {
throw($e);
}
}
}
}
}
/**
* Return size of a file in bytes.
*
* @param string $source encoded and serialized data of file
* @return int file size in bytes
*/
public function get_file_size($source) {
// TODO MDL-33297 remove this function completely?
$browser = get_file_browser();
$params = unserialize(base64_decode($source));
$contextid = clean_param($params['contextid'], PARAM_INT);
$fileitemid = clean_param($params['itemid'], PARAM_INT);
$filename = clean_param($params['filename'], PARAM_FILE);
$filepath = clean_param($params['filepath'], PARAM_PATH);
$filearea = clean_param($params['filearea'], PARAM_AREA);
$component = clean_param($params['component'], PARAM_COMPONENT);
$context = context::instance_by_id($contextid);
$file_info = $browser->get_file_info($context, $component, $filearea, $fileitemid, $filepath, $filename);
if (!empty($file_info)) {
$filesize = $file_info->get_filesize();
} else {
$filesize = null;
}
return $filesize;
}
/**
* Return is the instance is visible
* (is the type visible ? is the context enable ?)
*
* @return bool
*/
public function is_visible() {
$type = repository::get_type_by_id($this->options['typeid']);
$instanceoptions = repository::static_function($type->get_typename(), 'get_instance_option_names');
if ($type->get_visible()) {
//if the instance is unique so it's visible, otherwise check if the instance has a enabled context
if (empty($instanceoptions) || $type->get_contextvisibility(context::instance_by_id($this->instance->contextid))) {
return true;
}
}
return false;
}
/**
* Can the instance be edited by the current user?
*
* The property $readonly must not be used within this method because
* it only controls if the options from self::get_instance_option_names()
* can be edited.
*
* @return bool true if the user can edit the instance.
* @since Moodle 2.5
*/
public final function can_be_edited_by_user() {
global $USER;
// We need to be able to explore the repository.
try {
$this->check_capability();
} catch (repository_exception $e) {
return false;
}
$repocontext = context::instance_by_id($this->instance->contextid);
if ($repocontext->contextlevel == CONTEXT_USER && $repocontext->instanceid != $USER->id) {
// If the context of this instance is a user context, we need to be this user.
return false;
} else if ($repocontext->contextlevel == CONTEXT_MODULE && !has_capability('moodle/course:update', $repocontext)) {
// We need to have permissions on the course to edit the instance.
return false;
} else if ($repocontext->contextlevel == CONTEXT_SYSTEM && !has_capability('moodle/site:config', $repocontext)) {
// Do not meet the requirements for the context system.
return false;
}
return true;
}
/**
* Return the name of this instance, can be overridden.
*
* @return string
*/
public function get_name() {
if ($name = $this->instance->name) {
return $name;
} else {
return get_string('pluginname', 'repository_' . $this->get_typename());
}
}
/**
* Is this repository accessing private data?
*
* This function should return true for the repositories which access external private
* data from a user. This is the case for repositories such as Dropbox, Google Docs or Box.net
* which authenticate the user and then store the auth token.
*
* Of course, many repositories store 'private data', but we only want to set
* contains_private_data() to repositories which are external to Moodle and shouldn't be accessed
* to by the users having the capability to 'login as' someone else. For instance, the repository
* 'Private files' is not considered as private because it's part of Moodle.
*
* You should not set contains_private_data() to true on repositories which allow different types
* of instances as the levels other than 'user' are, by definition, not private. Also
* the user instances will be protected when they need to.
*
* @return boolean True when the repository accesses private external data.
* @since Moodle 2.5
*/
public function contains_private_data() {
return true;
}
/**
* What kind of files will be in this repository?
*
* @return array return '*' means this repository support any files, otherwise
* return mimetypes of files, it can be an array
*/
public function supported_filetypes() {
// return array('text/plain', 'image/gif');
return '*';
}
/**
* Tells how the file can be picked from this repository
*
* Maximum value is FILE_INTERNAL | FILE_EXTERNAL | FILE_REFERENCE
*
* @return int
*/
public function supported_returntypes() {
return (FILE_INTERNAL | FILE_EXTERNAL);
}
/**
* Tells how the file can be picked from this repository
*
* Maximum value is FILE_INTERNAL | FILE_EXTERNAL | FILE_REFERENCE
*
* @return int
*/
public function default_returntype() {
return FILE_INTERNAL;
}
/**
* Provide repository instance information for Ajax
*
* @return stdClass
*/
final public function get_meta() {
global $CFG, $OUTPUT;
$meta = new stdClass();
$meta->id = $this->id;
$meta->name = format_string($this->get_name());
$meta->type = $this->get_typename();
$meta->icon = $OUTPUT->image_url('icon', 'repository_'.$meta->type)->out(false);
$meta->supported_types = file_get_typegroup('extension', $this->supported_filetypes());
$meta->return_types = $this->supported_returntypes();
$meta->defaultreturntype = $this->default_returntype();
$meta->sortorder = $this->options['sortorder'];
return $meta;
}
/**
* Create an instance for this plug-in
*
* @static
* @param string $type the type of the repository
* @param int $userid the user id
* @param stdClass $context the context
* @param array $params the options for this instance
* @param int $readonly whether to create it readonly or not (defaults to not)
* @return mixed
*/
public static function create($type, $userid, $context, $params, $readonly=0) {
global $CFG, $DB;
$params = (array)$params;
require_once($CFG->dirroot . '/repository/'. $type . '/lib.php');
$classname = 'repository_' . $type;
if ($repo = $DB->get_record('repository', array('type'=>$type))) {
$record = new stdClass();
$record->name = $params['name'];
$record->typeid = $repo->id;
$record->timecreated = time();
$record->timemodified = time();
$record->contextid = $context->id;
$record->readonly = $readonly;
$record->userid = $userid;
$id = $DB->insert_record('repository_instances', $record);
cache::make('core', 'repositories')->purge();
$options = array();
$configs = call_user_func($classname . '::get_instance_option_names');
if (!empty($configs)) {
foreach ($configs as $config) {
if (isset($params[$config])) {
$options[$config] = $params[$config];
} else {
$options[$config] = null;
}
}
}
if (!empty($id)) {
unset($options['name']);
$instance = repository::get_instance($id);
$instance->set_option($options);
return $id;
} else {
return null;
}
} else {
return null;
}
}
/**
* delete a repository instance
*
* @param bool $downloadcontents
* @return bool
*/
final public function delete($downloadcontents = false) {
global $DB;
if ($downloadcontents) {
$this->convert_references_to_local();
} else {
$this->remove_files();
}
cache::make('core', 'repositories')->purge();
try {
$DB->delete_records('repository_instances', array('id'=>$this->id));
$DB->delete_records('repository_instance_config', array('instanceid'=>$this->id));
} catch (dml_exception $ex) {
return false;
}
return true;
}
/**
* Delete all the instances associated to a context.
*
* This method is intended to be a callback when deleting
* a course or a user to delete all the instances associated
* to their context. The usual way to delete a single instance
* is to use {@link self::delete()}.
*
* @param int $contextid context ID.
* @param boolean $downloadcontents true to convert references to hard copies.
* @return void
*/
final public static function delete_all_for_context($contextid, $downloadcontents = true) {
global $DB;
$repoids = $DB->get_fieldset_select('repository_instances', 'id', 'contextid = :contextid', array('contextid' => $contextid));
if ($downloadcontents) {
foreach ($repoids as $repoid) {
$repo = repository::get_repository_by_id($repoid, $contextid);
$repo->convert_references_to_local();
}
}
cache::make('core', 'repositories')->purge();
$DB->delete_records_list('repository_instances', 'id', $repoids);
$DB->delete_records_list('repository_instance_config', 'instanceid', $repoids);
}
/**
* Hide/Show a repository
*
* @param string $hide
* @return bool
*/
final public function hide($hide = 'toggle') {
global $DB;
if ($entry = $DB->get_record('repository', array('id'=>$this->id))) {
if ($hide === 'toggle' ) {
if (!empty($entry->visible)) {
$entry->visible = 0;
} else {
$entry->visible = 1;
}
} else {
if (!empty($hide)) {
$entry->visible = 0;
} else {
$entry->visible = 1;
}
}
return $DB->update_record('repository', $entry);
}
return false;
}
/**
* Save settings for repository instance
* $repo->set_option(array('api_key'=>'f2188bde132', 'name'=>'dongsheng'));
*
* @param array $options settings
* @return bool
*/
public function set_option($options = array()) {
global $DB;
if (!empty($options['name'])) {
$r = new stdClass();
$r->id = $this->id;
$r->name = $options['name'];
$DB->update_record('repository_instances', $r);
unset($options['name']);
}
foreach ($options as $name=>$value) {
if ($id = $DB->get_field('repository_instance_config', 'id', array('name'=>$name, 'instanceid'=>$this->id))) {
$DB->set_field('repository_instance_config', 'value', $value, array('id'=>$id));
} else {
$config = new stdClass();
$config->instanceid = $this->id;
$config->name = $name;
$config->value = $value;
$DB->insert_record('repository_instance_config', $config);
}
}
cache::make('core', 'repositories')->purge();
return true;
}
/**
* Get settings for repository instance.
*
* @param string $config a specific option to get.
* @return mixed returns an array of options. If $config is not empty, then it returns that option,
* or null if the option does not exist.
*/
public function get_option($config = '') {
global $DB;
$cache = cache::make('core', 'repositories');
if (($entries = $cache->get('ops:'. $this->id)) === false) {
$entries = $DB->get_records('repository_instance_config', array('instanceid' => $this->id));
$cache->set('ops:'. $this->id, $entries);
}
$ret = array();
foreach($entries as $entry) {
$ret[$entry->name] = $entry->value;
}
if (!empty($config)) {
if (isset($ret[$config])) {
return $ret[$config];
} else {
return null;
}
} else {
return $ret;
}
}
/**
* Filter file listing to display specific types
*
* @param array $value
* @return bool
*/
public function filter(&$value) {
$accepted_types = optional_param_array('accepted_types', '', PARAM_RAW);
if (isset($value['children'])) {
if (!empty($value['children'])) {
$value['children'] = array_filter($value['children'], array($this, 'filter'));
}
return true; // always return directories
} else {
if ($accepted_types == '*' or empty($accepted_types)
or (is_array($accepted_types) and in_array('*', $accepted_types))) {
return true;
} else {
foreach ($accepted_types as $ext) {
if (preg_match('#'.$ext.'$#i', $value['title'])) {
return true;
}
}
}
}
return false;
}
/**
* Given a path, and perhaps a search, get a list of files.
*
* See details on {@link http://docs.moodle.org/dev/Repository_plugins}
*
* @param string $path this parameter can a folder name, or a identification of folder
* @param string $page the page number of file list
* @return array the list of files, including meta infomation, containing the following keys
* manage, url to manage url
* client_id
* login, login form
* repo_id, active repository id
* login_btn_action, the login button action
* login_btn_label, the login button label
* total, number of results
* perpage, items per page
* page
* pages, total pages
* issearchresult, is it a search result?
* list, file list
* path, current path and parent path
*/
public function get_listing($path = '', $page = '') {
}
/**
* Prepare the breadcrumb.
*
* @param array $breadcrumb contains each element of the breadcrumb.
* @return array of breadcrumb elements.
* @since Moodle 2.3.3
*/
protected static function prepare_breadcrumb($breadcrumb) {
global $OUTPUT;
$foldericon = $OUTPUT->image_url(file_folder_icon(24))->out(false);
$len = count($breadcrumb);
for ($i = 0; $i < $len; $i++) {
if (is_array($breadcrumb[$i]) && !isset($breadcrumb[$i]['icon'])) {
$breadcrumb[$i]['icon'] = $foldericon;
} else if (is_object($breadcrumb[$i]) && !isset($breadcrumb[$i]->icon)) {
$breadcrumb[$i]->icon = $foldericon;
}
}
return $breadcrumb;
}
/**
* Prepare the file/folder listing.
*
* @param array $list of files and folders.
* @return array of files and folders.
* @since Moodle 2.3.3
*/
protected static function prepare_list($list) {
global $OUTPUT;
$foldericon = $OUTPUT->image_url(file_folder_icon(24))->out(false);
// Reset the array keys because non-numeric keys will create an object when converted to JSON.
$list = array_values($list);
$len = count($list);
for ($i = 0; $i < $len; $i++) {
if (is_object($list[$i])) {
$file = (array)$list[$i];
$converttoobject = true;
} else {
$file =& $list[$i];
$converttoobject = false;
}
if (isset($file['source'])) {
$file['sourcekey'] = sha1($file['source'] . self::get_secret_key() . sesskey());
}
if (isset($file['size'])) {
$file['size'] = (int)$file['size'];
$file['size_f'] = display_size($file['size']);
}
if (isset($file['license']) && get_string_manager()->string_exists($file['license'], 'license')) {
$file['license_f'] = get_string($file['license'], 'license');
}
if (isset($file['image_width']) && isset($file['image_height'])) {
$a = array('width' => $file['image_width'], 'height' => $file['image_height']);
$file['dimensions'] = get_string('imagesize', 'repository', (object)$a);
}
foreach (array('date', 'datemodified', 'datecreated') as $key) {
if (!isset($file[$key]) && isset($file['date'])) {
$file[$key] = $file['date'];
}
if (isset($file[$key])) {
// must be UNIX timestamp
$file[$key] = (int)$file[$key];
if (!$file[$key]) {
unset($file[$key]);
} else {
$file[$key.'_f'] = userdate($file[$key], get_string('strftimedatetime', 'langconfig'));
$file[$key.'_f_s'] = userdate($file[$key], get_string('strftimedatetimeshort', 'langconfig'));
}
}
}
$isfolder = (array_key_exists('children', $file) || (isset($file['type']) && $file['type'] == 'folder'));
$filename = null;
if (isset($file['title'])) {
$filename = $file['title'];
}
else if (isset($file['fullname'])) {
$filename = $file['fullname'];
}
if (!isset($file['mimetype']) && !$isfolder && $filename) {
$file['mimetype'] = get_mimetype_description(array('filename' => $filename));
}
if (!isset($file['icon'])) {
if ($isfolder) {
$file['icon'] = $foldericon;
} else if ($filename) {
$file['icon'] = $OUTPUT->image_url(file_extension_icon($filename, 24))->out(false);
}
}
// Recursively loop over children.
if (isset($file['children'])) {
$file['children'] = self::prepare_list($file['children']);
}
// Convert the array back to an object.
if ($converttoobject) {
$list[$i] = (object)$file;
}
}
return $list;
}
/**
* Prepares list of files before passing it to AJAX, makes sure data is in the correct
* format and stores formatted values.
*
* @param array|stdClass $listing result of get_listing() or search() or file_get_drafarea_files()
* @return array
*/
public static function prepare_listing($listing) {
$wasobject = false;
if (is_object($listing)) {
$listing = (array) $listing;
$wasobject = true;
}
// Prepare the breadcrumb, passed as 'path'.
if (isset($listing['path']) && is_array($listing['path'])) {
$listing['path'] = self::prepare_breadcrumb($listing['path']);
}
// Prepare the listing of objects.
if (isset($listing['list']) && is_array($listing['list'])) {
$listing['list'] = self::prepare_list($listing['list']);
}
// Convert back to an object.
if ($wasobject) {
$listing = (object) $listing;
}
return $listing;
}
/**
* Search files in repository
* When doing global search, $search_text will be used as
* keyword.
*
* @param string $search_text search key word
* @param int $page page
* @return mixed see {@link repository::get_listing()}
*/
public function search($search_text, $page = 0) {
$list = array();
$list['list'] = array();
return false;
}
/**
* Logout from repository instance
* By default, this function will return a login form
*
* @return string
*/
public function logout(){
return $this->print_login();
}
/**
* To check whether the user is logged in.
*
* @return bool
*/
public function check_login(){
return true;
}
/**
* Show the login screen, if required
*
* @return string
*/
public function print_login(){
return $this->get_listing();
}
/**
* Show the search screen, if required
*
* @return string
*/
public function print_search() {
global $PAGE;
$renderer = $PAGE->get_renderer('core', 'files');
return $renderer->repository_default_searchform();
}
/**
* For oauth like external authentication, when external repository direct user back to moodle,
* this function will be called to set up token and token_secret
*/
public function callback() {
}
/**
* is it possible to do glboal search?
*
* @return bool
*/
public function global_search() {
return false;
}
/**
* Defines operations that happen occasionally on cron
*
* @return bool
*/
public function cron() {
return true;
}
/**
* function which is run when the type is created (moodle administrator add the plugin)
*
* @return bool success or fail?
*/
public static function plugin_init() {
return true;
}
/**
* Edit/Create Admin Settings Moodle form
*
* @param moodleform $mform Moodle form (passed by reference)
* @param string $classname repository class name
*/
public static function type_config_form($mform, $classname = 'repository') {
$instnaceoptions = call_user_func(array($classname, 'get_instance_option_names'), $mform, $classname);
if (empty($instnaceoptions)) {
// this plugin has only one instance
// so we need to give it a name
// it can be empty, then moodle will look for instance name from language string
$mform->addElement('text', 'pluginname', get_string('pluginname', 'repository'), array('size' => '40'));
$mform->addElement('static', 'pluginnamehelp', '', get_string('pluginnamehelp', 'repository'));
$mform->setType('pluginname', PARAM_TEXT);
}
}
/**
* Validate Admin Settings Moodle form
*
* @static
* @param moodleform $mform Moodle form (passed by reference)
* @param array $data array of ("fieldname"=>value) of submitted data
* @param array $errors array of ("fieldname"=>errormessage) of errors
* @return array array of errors
*/
public static function type_form_validation($mform, $data, $errors) {
return $errors;
}
/**
* Edit/Create Instance Settings Moodle form
*
* @param moodleform $mform Moodle form (passed by reference)
*/
public static function instance_config_form($mform) {
}
/**
* Return names of the general options.
* By default: no general option name
*
* @return array
*/
public static function get_type_option_names() {
return array('pluginname');
}
/**
* Return names of the instance options.
* By default: no instance option name
*
* @return array
*/
public static function get_instance_option_names() {
return array();
}
/**
* Validate repository plugin instance form
*
* @param moodleform $mform moodle form
* @param array $data form data
* @param array $errors errors
* @return array errors
*/
public static function instance_form_validation($mform, $data, $errors) {
return $errors;
}
/**
* Create a shorten filename
*
* @param string $str filename
* @param int $maxlength max file name length
* @return string short filename
*/
public function get_short_filename($str, $maxlength) {
if (core_text::strlen($str) >= $maxlength) {
return trim(core_text::substr($str, 0, $maxlength)).'...';
} else {
return $str;
}
}
/**
* Overwrite an existing file
*
* @param int $itemid
* @param string $filepath
* @param string $filename
* @param string $newfilepath
* @param string $newfilename
* @return bool
*/
public static function overwrite_existing_draftfile($itemid, $filepath, $filename, $newfilepath, $newfilename) {
global $USER;
$fs = get_file_storage();
$user_context = context_user::instance($USER->id);
if ($file = $fs->get_file($user_context->id, 'user', 'draft', $itemid, $filepath, $filename)) {
if ($tempfile = $fs->get_file($user_context->id, 'user', 'draft', $itemid, $newfilepath, $newfilename)) {
// Remember original file source field.
$source = @unserialize($file->get_source());
// Remember the original sortorder.
$sortorder = $file->get_sortorder();
if ($tempfile->is_external_file()) {
// New file is a reference. Check that existing file does not have any other files referencing to it
if (isset($source->original) && $fs->search_references_count($source->original)) {
return (object)array('error' => get_string('errordoublereference', 'repository'));
}
}
// delete existing file to release filename
$file->delete();
// create new file
$newfile = $fs->create_file_from_storedfile(array('filepath'=>$filepath, 'filename'=>$filename), $tempfile);
// Preserve original file location (stored in source field) for handling references
if (isset($source->original)) {
if (!($newfilesource = @unserialize($newfile->get_source()))) {
$newfilesource = new stdClass();
}
$newfilesource->original = $source->original;
$newfile->set_source(serialize($newfilesource));
}
$newfile->set_sortorder($sortorder);
// remove temp file
$tempfile->delete();
return true;
}
}
return false;
}
/**
* Updates a file in draft filearea.
*
* This function can only update fields filepath, filename, author, license.
* If anything (except filepath) is updated, timemodified is set to current time.
* If filename or filepath is updated the file unconnects from it's origin
* and therefore all references to it will be converted to copies when
* filearea is saved.
*
* @param int $draftid
* @param string $filepath path to the directory containing the file, or full path in case of directory
* @param string $filename name of the file, or '.' in case of directory
* @param array $updatedata array of fields to change (only filename, filepath, license and/or author can be updated)
* @throws moodle_exception if for any reason file can not be updated (file does not exist, target already exists, etc.)
*/
public static function update_draftfile($draftid, $filepath, $filename, $updatedata) {
global $USER;
$fs = get_file_storage();
$usercontext = context_user::instance($USER->id);
// make sure filename and filepath are present in $updatedata
$updatedata = $updatedata + array('filepath' => $filepath, 'filename' => $filename);
$filemodified = false;
if (!$file = $fs->get_file($usercontext->id, 'user', 'draft', $draftid, $filepath, $filename)) {
if ($filename === '.') {
throw new moodle_exception('foldernotfound', 'repository');
} else {
throw new moodle_exception('filenotfound', 'error');
}
}
if (!$file->is_directory()) {
// This is a file
if ($updatedata['filepath'] !== $filepath || $updatedata['filename'] !== $filename) {
// Rename/move file: check that target file name does not exist.
if ($fs->file_exists($usercontext->id, 'user', 'draft', $draftid, $updatedata['filepath'], $updatedata['filename'])) {
throw new moodle_exception('fileexists', 'repository');
}
if (($filesource = @unserialize($file->get_source())) && isset($filesource->original)) {
unset($filesource->original);
$file->set_source(serialize($filesource));
}
$file->rename($updatedata['filepath'], $updatedata['filename']);
// timemodified is updated only when file is renamed and not updated when file is moved.
$filemodified = $filemodified || ($updatedata['filename'] !== $filename);
}
if (array_key_exists('license', $updatedata) && $updatedata['license'] !== $file->get_license()) {
// Update license and timemodified.
$file->set_license($updatedata['license']);
$filemodified = true;
}
if (array_key_exists('author', $updatedata) && $updatedata['author'] !== $file->get_author()) {
// Update author and timemodified.
$file->set_author($updatedata['author']);
$filemodified = true;
}
// Update timemodified:
if ($filemodified) {
$file->set_timemodified(time());
}
} else {
// This is a directory - only filepath can be updated for a directory (it was moved).
if ($updatedata['filepath'] === $filepath) {
// nothing to update
return;
}
if ($fs->file_exists($usercontext->id, 'user', 'draft', $draftid, $updatedata['filepath'], '.')) {
// bad luck, we can not rename if something already exists there
throw new moodle_exception('folderexists', 'repository');
}
$xfilepath = preg_quote($filepath, '|');
if (preg_match("|^$xfilepath|", $updatedata['filepath'])) {
// we can not move folder to it's own subfolder
throw new moodle_exception('folderrecurse', 'repository');
}
// If directory changed the name, update timemodified.
$filemodified = (basename(rtrim($file->get_filepath(), '/')) !== basename(rtrim($updatedata['filepath'], '/')));
// Now update directory and all children.
$files = $fs->get_area_files($usercontext->id, 'user', 'draft', $draftid);
foreach ($files as $f) {
if (preg_match("|^$xfilepath|", $f->get_filepath())) {
$path = preg_replace("|^$xfilepath|", $updatedata['filepath'], $f->get_filepath());
if (($filesource = @unserialize($f->get_source())) && isset($filesource->original)) {
// unset original so the references are not shown any more
unset($filesource->original);
$f->set_source(serialize($filesource));
}
$f->rename($path, $f->get_filename());
if ($filemodified && $f->get_filepath() === $updatedata['filepath'] && $f->get_filename() === $filename) {
$f->set_timemodified(time());
}
}
}
}
}
/**
* Delete a temp file from draft area
*
* @param int $draftitemid
* @param string $filepath
* @param string $filename
* @return bool
*/
public static function delete_tempfile_from_draft($draftitemid, $filepath, $filename) {
global $USER;
$fs = get_file_storage();
$user_context = context_user::instance($USER->id);
if ($file = $fs->get_file($user_context->id, 'user', 'draft', $draftitemid, $filepath, $filename)) {
$file->delete();
return true;
} else {
return false;
}
}
/**
* Find all external files in this repo and import them
*/
public function convert_references_to_local() {
$fs = get_file_storage();
$files = $fs->get_external_files($this->id);
foreach ($files as $storedfile) {
$fs->import_external_file($storedfile);
}
}
/**
* Find all external files linked to this repository and delete them.
*/
public function remove_files() {
$fs = get_file_storage();
$files = $fs->get_external_files($this->id);
foreach ($files as $storedfile) {
$storedfile->delete();
}
}
/**
* Function repository::reset_caches() is deprecated, cache is handled by MUC now.
* @deprecated since Moodle 2.6 MDL-42016 - please do not use this function any more.
*/
public static function reset_caches() {
throw new coding_exception('Function repository::reset_caches() can not be used any more, cache is handled by MUC now.');
}
/**
* Function repository::sync_external_file() is deprecated. Use repository::sync_reference instead
*
* @deprecated since Moodle 2.6 MDL-42016 - please do not use this function any more.
* @see repository::sync_reference()
*/
public static function sync_external_file($file, $resetsynchistory = false) {
throw new coding_exception('Function repository::sync_external_file() can not be used any more. ' .
'Use repository::sync_reference instead.');
}
/**
* Performs synchronisation of an external file if the previous one has expired.
*
* This function must be implemented for external repositories supporting
* FILE_REFERENCE, it is called for existing aliases when their filesize,
* contenthash or timemodified are requested. It is not called for internal
* repositories (see {@link repository::has_moodle_files()}), references to
* internal files are updated immediately when source is modified.
*
* Referenced files may optionally keep their content in Moodle filepool (for
* thumbnail generation or to be able to serve cached copy). In this
* case both contenthash and filesize need to be synchronized. Otherwise repositories
* should use contenthash of empty file and correct filesize in bytes.
*
* Note that this function may be run for EACH file that needs to be synchronised at the
* moment. If anything is being downloaded or requested from external sources there
* should be a small timeout. The synchronisation is performed to update the size of
* the file and/or to update image and re-generated image preview. There is nothing
* fatal if syncronisation fails but it is fatal if syncronisation takes too long
* and hangs the script generating a page.
*
* Note: If you wish to call $file->get_filesize(), $file->get_contenthash() or
* $file->get_timemodified() make sure that recursion does not happen.
*
* Called from {@link stored_file::sync_external_file()}
*
* @uses stored_file::set_missingsource()
* @uses stored_file::set_synchronized()
* @param stored_file $file
* @return bool false when file does not need synchronisation, true if it was synchronised
*/
public function sync_reference(stored_file $file) {
if ($file->get_repository_id() != $this->id) {
// This should not really happen because the function can be called from stored_file only.
return false;
}
if ($this->has_moodle_files()) {
// References to local files need to be synchronised only once.
// Later they will be synchronised automatically when the source is changed.
if ($file->get_referencelastsync()) {
return false;
}
$fs = get_file_storage();
$params = file_storage::unpack_reference($file->get_reference(), true);
if (!is_array($params) || !($storedfile = $fs->get_file($params['contextid'],
$params['component'], $params['filearea'], $params['itemid'], $params['filepath'],
$params['filename']))) {
$file->set_missingsource();
} else {
$file->set_synchronized($storedfile->get_contenthash(), $storedfile->get_filesize(), 0, $storedfile->get_timemodified());
}
return true;
}
return false;
}
/**
* Build draft file's source field
*
* {@link file_restore_source_field_from_draft_file()}
* XXX: This is a hack for file manager (MDL-28666)
* For newly created draft files we have to construct
* source filed in php serialized data format.
* File manager needs to know the original file information before copying
* to draft area, so we append these information in mdl_files.source field
*
* @param string $source
* @return string serialised source field
*/
public static function build_source_field($source) {
$sourcefield = new stdClass;
$sourcefield->source = $source;
return serialize($sourcefield);
}
/**
* Prepares the repository to be cached. Implements method from cacheable_object interface.
*
* @return array
*/
public function prepare_to_cache() {
return array(
'class' => get_class($this),
'id' => $this->id,
'ctxid' => $this->context->id,
'options' => $this->options,
'readonly' => $this->readonly
);
}
/**
* Restores the repository from cache. Implements method from cacheable_object interface.
*
* @return array
*/
public static function wake_from_cache($data) {
$classname = $data['class'];
return new $classname($data['id'], $data['ctxid'], $data['options'], $data['readonly']);
}
/**
* Gets a file relative to this file in the repository and sends it to the browser.
* Used to allow relative file linking within a repository without creating file records
* for linked files
*
* Repositories that overwrite this must be very careful - see filesystem repository for example.
*
* @param stored_file $mainfile The main file we are trying to access relative files for.
* @param string $relativepath the relative path to the file we are trying to access.
*
*/
public function send_relative_file(stored_file $mainfile, $relativepath) {
// This repository hasn't implemented this so send_file_not_found.
send_file_not_found();
}
/**
* helper function to check if the repository supports send_relative_file.
*
* @return true|false
*/
public function supports_relative_file() {
return false;
}
/**
* Helper function to indicate if this repository uses post requests for uploading files.
*
* @deprecated since Moodle 3.2, 3.1.1, 3.0.5
* @return bool
*/
public function uses_post_requests() {
debugging('The method repository::uses_post_requests() is deprecated and must not be used anymore.', DEBUG_DEVELOPER);
return false;
}
/**
* Generate a secret key to be used for passing sensitive information around.
*
* @return string repository secret key.
*/
final static public function get_secret_key() {
global $CFG;
if (!isset($CFG->reposecretkey)) {
set_config('reposecretkey', time() . random_string(32));
}
return $CFG->reposecretkey;
}
}
/**
* Exception class for repository api
*
* @since Moodle 2.0
* @package core_repository
* @copyright 2009 Dongsheng Cai {@link http://dongsheng.org}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class repository_exception extends moodle_exception {
}
/**
* This is a class used to define a repository instance form
*
* @since Moodle 2.0
* @package core_repository
* @copyright 2009 Dongsheng Cai {@link http://dongsheng.org}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
final class repository_instance_form extends moodleform {
/** @var stdClass repository instance */
protected $instance;
/** @var string repository plugin type */
protected $plugin;
/**
* Added defaults to moodle form
*/
protected function add_defaults() {
$mform =& $this->_form;
$strrequired = get_string('required');
$mform->addElement('hidden', 'edit', ($this->instance) ? $this->instance->id : 0);
$mform->setType('edit', PARAM_INT);
$mform->addElement('hidden', 'new', $this->plugin);
$mform->setType('new', PARAM_ALPHANUMEXT);
$mform->addElement('hidden', 'plugin', $this->plugin);
$mform->setType('plugin', PARAM_PLUGIN);
$mform->addElement('hidden', 'typeid', $this->typeid);
$mform->setType('typeid', PARAM_INT);
$mform->addElement('hidden', 'contextid', $this->contextid);
$mform->setType('contextid', PARAM_INT);
$mform->addElement('text', 'name', get_string('name'), 'maxlength="100" size="30"');
$mform->addRule('name', $strrequired, 'required', null, 'client');
$mform->setType('name', PARAM_TEXT);
}
/**
* Define moodle form elements
*/
public function definition() {
global $CFG;
// type of plugin, string
$this->plugin = $this->_customdata['plugin'];
$this->typeid = $this->_customdata['typeid'];
$this->contextid = $this->_customdata['contextid'];
$this->instance = (isset($this->_customdata['instance'])
&& is_subclass_of($this->_customdata['instance'], 'repository'))
? $this->_customdata['instance'] : null;
$mform =& $this->_form;
$this->add_defaults();
// Add instance config options.
$result = repository::static_function($this->plugin, 'instance_config_form', $mform);
if ($result === false) {
// Remove the name element if no other config options.
$mform->removeElement('name');
}
if ($this->instance) {
$data = array();
$data['name'] = $this->instance->name;
if (!$this->instance->readonly) {
// and set the data if we have some.
foreach ($this->instance->get_instance_option_names() as $config) {
if (!empty($this->instance->options[$config])) {
$data[$config] = $this->instance->options[$config];
} else {
$data[$config] = '';
}
}
}
$this->set_data($data);
}
if ($result === false) {
$mform->addElement('cancel');
} else {
$this->add_action_buttons(true, get_string('save','repository'));
}
}
/**
* Validate moodle form data
*
* @param array $data form data
* @param array $files files in form
* @return array errors
*/
public function validation($data, $files) {
global $DB;
$errors = array();
$plugin = $this->_customdata['plugin'];
$instance = (isset($this->_customdata['instance'])
&& is_subclass_of($this->_customdata['instance'], 'repository'))
? $this->_customdata['instance'] : null;
if (!$instance) {
$errors = repository::static_function($plugin, 'instance_form_validation', $this, $data, $errors);
} else {
$errors = $instance->instance_form_validation($this, $data, $errors);
}
$sql = "SELECT count('x')
FROM {repository_instances} i, {repository} r
WHERE r.type=:plugin AND r.id=i.typeid AND i.name=:name AND i.contextid=:contextid";
$params = array('name' => $data['name'], 'plugin' => $this->plugin, 'contextid' => $this->contextid);
if ($instance) {
$sql .= ' AND i.id != :instanceid';
$params['instanceid'] = $instance->id;
}
if ($DB->count_records_sql($sql, $params) > 0) {
$errors['name'] = get_string('erroruniquename', 'repository');
}
return $errors;
}
}
/**
* This is a class used to define a repository type setting form
*
* @since Moodle 2.0
* @package core_repository
* @copyright 2009 Dongsheng Cai {@link http://dongsheng.org}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
final class repository_type_form extends moodleform {
/** @var stdClass repository instance */
protected $instance;
/** @var string repository plugin name */
protected $plugin;
/** @var string action */
protected $action;
/**
* Definition of the moodleform
*/
public function definition() {
global $CFG;
// type of plugin, string
$this->plugin = $this->_customdata['plugin'];
$this->instance = (isset($this->_customdata['instance'])
&& is_a($this->_customdata['instance'], 'repository_type'))
? $this->_customdata['instance'] : null;
$this->action = $this->_customdata['action'];
$this->pluginname = $this->_customdata['pluginname'];
$mform =& $this->_form;
$strrequired = get_string('required');
$mform->addElement('hidden', 'action', $this->action);
$mform->setType('action', PARAM_TEXT);
$mform->addElement('hidden', 'repos', $this->plugin);
$mform->setType('repos', PARAM_PLUGIN);
// let the plugin add its specific fields
$classname = 'repository_' . $this->plugin;
require_once($CFG->dirroot . '/repository/' . $this->plugin . '/lib.php');
//add "enable course/user instances" checkboxes if multiple instances are allowed
$instanceoptionnames = repository::static_function($this->plugin, 'get_instance_option_names');
$result = call_user_func(array($classname, 'type_config_form'), $mform, $classname);
if (!empty($instanceoptionnames)) {
$sm = get_string_manager();
$component = 'repository';
if ($sm->string_exists('enablecourseinstances', 'repository_' . $this->plugin)) {
$component .= ('_' . $this->plugin);
}
$mform->addElement('checkbox', 'enablecourseinstances', get_string('enablecourseinstances', $component));
$mform->setType('enablecourseinstances', PARAM_BOOL);
$component = 'repository';
if ($sm->string_exists('enableuserinstances', 'repository_' . $this->plugin)) {
$component .= ('_' . $this->plugin);
}
$mform->addElement('checkbox', 'enableuserinstances', get_string('enableuserinstances', $component));
$mform->setType('enableuserinstances', PARAM_BOOL);
}
// set the data if we have some.
if ($this->instance) {
$data = array();
$option_names = call_user_func(array($classname,'get_type_option_names'));
if (!empty($instanceoptionnames)){
$option_names[] = 'enablecourseinstances';
$option_names[] = 'enableuserinstances';
}
$instanceoptions = $this->instance->get_options();
foreach ($option_names as $config) {
if (!empty($instanceoptions[$config])) {
$data[$config] = $instanceoptions[$config];
} else {
$data[$config] = '';
}
}
// XXX: set plugin name for plugins which doesn't have muliti instances
if (empty($instanceoptionnames)){
$data['pluginname'] = $this->pluginname;
}
$this->set_data($data);
}
$this->add_action_buttons(true, get_string('save','repository'));
}
/**
* Validate moodle form data
*
* @param array $data moodle form data
* @param array $files
* @return array errors
*/
public function validation($data, $files) {
$errors = array();
$plugin = $this->_customdata['plugin'];
$instance = (isset($this->_customdata['instance'])
&& is_subclass_of($this->_customdata['instance'], 'repository'))
? $this->_customdata['instance'] : null;
if (!$instance) {
$errors = repository::static_function($plugin, 'type_form_validation', $this, $data, $errors);
} else {
$errors = $instance->type_form_validation($this, $data, $errors);
}
return $errors;
}
}
/**
* Generate all options needed by filepicker
*
* @param array $args including following keys
* context
* accepted_types
* return_types
*
* @return array the list of repository instances, including meta infomation, containing the following keys
* externallink
* repositories
* accepted_types
*/
function initialise_filepicker($args) {
global $CFG, $USER, $PAGE;
static $templatesinitialized = array();
require_once($CFG->libdir . '/licenselib.php');
$return = new stdClass();
$licenses = license_manager::get_licenses();
if (!empty($CFG->sitedefaultlicense)) {
$return->defaultlicense = $CFG->sitedefaultlicense;
}
$return->licenses = $licenses;
$return->author = fullname($USER);
if (empty($args->context)) {
$context = $PAGE->context;
} else {
$context = $args->context;
}
$disable_types = array();
if (!empty($args->disable_types)) {
$disable_types = $args->disable_types;
}
$user_context = context_user::instance($USER->id);
list($context, $course, $cm) = get_context_info_array($context->id);
$contexts = array($user_context, context_system::instance());
if (!empty($course)) {
// adding course context
$contexts[] = context_course::instance($course->id);
}
$externallink = (int)get_config(null, 'repositoryallowexternallinks');
$repositories = repository::get_instances(array(
'context'=>$contexts,
'currentcontext'=> $context,
'accepted_types'=>$args->accepted_types,
'return_types'=>$args->return_types,
'disable_types'=>$disable_types
));
$return->repositories = array();
if (empty($externallink)) {
$return->externallink = false;
} else {
$return->externallink = true;
}
$return->rememberuserlicensepref = (bool) get_config(null, 'rememberuserlicensepref');
$return->userprefs = array();
$return->userprefs['recentrepository'] = get_user_preferences('filepicker_recentrepository', '');
$return->userprefs['recentlicense'] = get_user_preferences('filepicker_recentlicense', '');
$return->userprefs['recentviewmode'] = get_user_preferences('filepicker_recentviewmode', '');
user_preference_allow_ajax_update('filepicker_recentrepository', PARAM_INT);
user_preference_allow_ajax_update('filepicker_recentlicense', PARAM_SAFEDIR);
user_preference_allow_ajax_update('filepicker_recentviewmode', PARAM_INT);
// provided by form element
$return->accepted_types = file_get_typegroup('extension', $args->accepted_types);
$return->return_types = $args->return_types;
$templates = array();
foreach ($repositories as $repository) {
$meta = $repository->get_meta();
// Please note that the array keys for repositories are used within
// JavaScript a lot, the key NEEDS to be the repository id.
$return->repositories[$repository->id] = $meta;
// Register custom repository template if it has one
if(method_exists($repository, 'get_upload_template') && !array_key_exists('uploadform_' . $meta->type, $templatesinitialized)) {
$templates['uploadform_' . $meta->type] = $repository->get_upload_template();
$templatesinitialized['uploadform_' . $meta->type] = true;
}
}
if (!array_key_exists('core', $templatesinitialized)) {
// we need to send each filepicker template to the browser just once
$fprenderer = $PAGE->get_renderer('core', 'files');
$templates = array_merge($templates, $fprenderer->filepicker_js_templates());
$templatesinitialized['core'] = true;
}
if (sizeof($templates)) {
$PAGE->requires->js_init_call('M.core_filepicker.set_templates', array($templates), true);
}
return $return;
}
/**
* Convenience function to handle deletion of files.
*
* @param object $context The context where the delete is called
* @param string $component component
* @param string $filearea filearea
* @param int $itemid the item id
* @param array $files Array of files object with each item having filename/filepath as values
* @return array $return Array of strings matching up to the parent directory of the deleted files
* @throws coding_exception
*/
function repository_delete_selected_files($context, string $component, string $filearea, $itemid, array $files) {
$fs = get_file_storage();
$return = [];
foreach ($files as $selectedfile) {
$filename = clean_filename($selectedfile->filename);
$filepath = clean_param($selectedfile->filepath, PARAM_PATH);
$filepath = file_correct_filepath($filepath);
if ($storedfile = $fs->get_file($context->id, $component, $filearea, $itemid, $filepath, $filename)) {
$parentpath = $storedfile->get_parent_directory()->get_filepath();
if ($storedfile->is_directory()) {
$files = $fs->get_directory_files($context->id, $component, $filearea, $itemid, $filepath, true);
foreach ($files as $file) {
$file->delete();
}
$storedfile->delete();
$return[$parentpath] = "";
} else {
if ($result = $storedfile->delete()) {
$return[$parentpath] = "";
}
}
}
}
return $return;
}
/**
* Convenience function to handle deletion of files.
*
* @param object $context The context where the delete is called
* @param string $component component
* @param string $filearea filearea
* @param int $itemid the item id
* @param array $files Array of files object with each item having filename/filepath as values
* @return array $return Array of strings matching up to the parent directory of the deleted files
* @throws coding_exception
*/
function repository_download_selected_files($context, string $component, string $filearea, $itemid, array $files) {
global $USER;
$return = false;
$zipper = get_file_packer('application/zip');
$fs = get_file_storage();
// Archive compressed file to an unused draft area.
$newdraftitemid = file_get_unused_draft_itemid();
$filestoarchive = [];
foreach ($files as $selectedfile) {
$filename = $selectedfile->filename ? clean_filename($selectedfile->filename) : '.'; // Default to '.' for root.
$filepath = clean_param($selectedfile->filepath, PARAM_PATH); // Default to '/' for downloadall.
$filepath = file_correct_filepath($filepath);
$area = file_get_draft_area_info($itemid, $filepath);
if ($area['filecount'] == 0 && $area['foldercount'] == 0) {
continue;
}
$storedfile = $fs->get_file($context->id, $component, $filearea, $itemid, $filepath, $filename);
// If it is empty we are downloading a directory.
$archivefile = $storedfile->get_filename();
if (!$filename || $filename == '.' ) {
$foldername = explode('/', trim($filepath, '/'));
$folder = trim(array_pop($foldername), '/');
$archivefile = $folder ?? '/';
}
$filestoarchive[$archivefile] = $storedfile;
}
$zippedfile = get_string('files') . '.zip';
if ($newfile =
$zipper->archive_to_storage(
$filestoarchive,
$context->id,
$component,
$filearea,
$newdraftitemid,
"/",
$zippedfile, $USER->id)
) {
$return = new stdClass();
$return->fileurl = moodle_url::make_draftfile_url($newdraftitemid, '/', $zippedfile)->out();
$return->filepath = $filepath;
}
return $return;
}