3 // This file is part of Moodle - http://moodle.org/
5 // Moodle is free software: you can redistribute it and/or modify
6 // it under the terms of the GNU General Public License as published by
7 // the Free Software Foundation, either version 3 of the License, or
8 // (at your option) any later version.
10 // Moodle is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 // GNU General Public License for more details.
15 // You should have received a copy of the GNU General Public License
16 // along with Moodle. If not, see <http://www.gnu.org/licenses/>.
19 * Defines classes used for plugins management
21 * This library provides a unified interface to various plugin types in
22 * Moodle. It is mainly used by the plugins management admin page and the
23 * plugins check page during the upgrade.
27 * @copyright 2011 David Mudrak <david@moodle.com>
28 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
31 defined('MOODLE_INTERNAL') || die();
34 * Singleton class providing general plugins management functionality
36 class plugin_manager {
38 /** the plugin is shipped with standard Moodle distribution */
39 const PLUGIN_SOURCE_STANDARD = 'std';
40 /** the plugin is added extension */
41 const PLUGIN_SOURCE_EXTENSION = 'ext';
43 /** the plugin uses neither database nor capabilities, no versions */
44 const PLUGIN_STATUS_NODB = 'nodb';
45 /** the plugin is up-to-date */
46 const PLUGIN_STATUS_UPTODATE = 'uptodate';
47 /** the plugin is about to be installed */
48 const PLUGIN_STATUS_NEW = 'new';
49 /** the plugin is about to be upgraded */
50 const PLUGIN_STATUS_UPGRADE = 'upgrade';
51 /** the standard plugin is about to be deleted */
52 const PLUGIN_STATUS_DELETE = 'delete';
53 /** the version at the disk is lower than the one already installed */
54 const PLUGIN_STATUS_DOWNGRADE = 'downgrade';
55 /** the plugin is installed but missing from disk */
56 const PLUGIN_STATUS_MISSING = 'missing';
58 /** @var plugin_manager holds the singleton instance */
59 protected static $singletoninstance;
60 /** @var array of raw plugins information */
61 protected $pluginsinfo = null;
62 /** @var array of raw subplugins information */
63 protected $subpluginsinfo = null;
66 * Direct initiation not allowed, use the factory method {@link self::instance()}
68 protected function __construct() {
72 * Sorry, this is singleton
74 protected function __clone() {
78 * Factory method for this class
80 * @return plugin_manager the singleton instance
82 public static function instance() {
83 if (is_null(self::$singletoninstance)) {
84 self::$singletoninstance = new self();
86 return self::$singletoninstance;
91 * @param bool $phpunitreset
93 public static function reset_caches($phpunitreset = false) {
95 self::$singletoninstance = null;
100 * Returns the result of {@link get_plugin_types()} ordered for humans
102 * @see self::reorder_plugin_types()
103 * @param bool $fullpaths false means relative paths from dirroot
104 * @return array (string)name => (string)location
106 public function get_plugin_types($fullpaths = true) {
107 return $this->reorder_plugin_types(get_plugin_types($fullpaths));
111 * Returns list of known plugins of the given type
113 * This method returns the subset of the tree returned by {@link self::get_plugins()}.
114 * If the given type is not known, empty array is returned.
116 * @param string $type plugin type, e.g. 'mod' or 'workshopallocation'
117 * @param bool $disablecache force reload, cache can be used otherwise
118 * @return array (string)plugin name (e.g. 'workshop') => corresponding subclass of {@link plugininfo_base}
120 public function get_plugins_of_type($type, $disablecache=false) {
122 $plugins = $this->get_plugins($disablecache);
124 if (!isset($plugins[$type])) {
128 return $plugins[$type];
132 * Returns a tree of known plugins and information about them
134 * @param bool $disablecache force reload, cache can be used otherwise
135 * @return array 2D array. The first keys are plugin type names (e.g. qtype);
136 * the second keys are the plugin local name (e.g. multichoice); and
137 * the values are the corresponding objects extending {@link plugininfo_base}
139 public function get_plugins($disablecache=false) {
142 if ($disablecache or is_null($this->pluginsinfo)) {
143 // Hack: include mod and editor subplugin management classes first,
144 // the adminlib.php is supposed to contain extra admin settings too.
145 require_once($CFG->libdir.'/adminlib.php');
146 foreach (core_component::get_plugin_types_with_subplugins() as $type => $ignored) {
147 foreach (core_component::get_plugin_list($type) as $dir) {
148 if (file_exists("$dir/adminlib.php")) {
149 include_once("$dir/adminlib.php");
153 $this->pluginsinfo = array();
154 $plugintypes = $this->get_plugin_types();
155 foreach ($plugintypes as $plugintype => $plugintyperootdir) {
156 if (in_array($plugintype, array('base', 'general'))) {
157 throw new coding_exception('Illegal usage of reserved word for plugin type');
159 if (class_exists('plugininfo_' . $plugintype)) {
160 $plugintypeclass = 'plugininfo_' . $plugintype;
162 $plugintypeclass = 'plugininfo_general';
164 if (!in_array('plugininfo_base', class_parents($plugintypeclass))) {
165 throw new coding_exception('Class ' . $plugintypeclass . ' must extend plugininfo_base');
167 $plugins = call_user_func(array($plugintypeclass, 'get_plugins'), $plugintype, $plugintyperootdir, $plugintypeclass);
168 $this->pluginsinfo[$plugintype] = $plugins;
171 if (empty($CFG->disableupdatenotifications) and !during_initial_install()) {
172 // append the information about available updates provided by {@link available_update_checker()}
173 $provider = available_update_checker::instance();
174 foreach ($this->pluginsinfo as $plugintype => $plugins) {
175 foreach ($plugins as $plugininfoholder) {
176 $plugininfoholder->check_available_updates($provider);
182 return $this->pluginsinfo;
186 * Returns list of all known subplugins of the given plugin
188 * For plugins that do not provide subplugins (i.e. there is no support for it),
189 * empty array is returned.
191 * @param string $component full component name, e.g. 'mod_workshop'
192 * @param bool $disablecache force reload, cache can be used otherwise
193 * @return array (string) component name (e.g. 'workshopallocation_random') => subclass of {@link plugininfo_base}
195 public function get_subplugins_of_plugin($component, $disablecache=false) {
197 $pluginfo = $this->get_plugin_info($component, $disablecache);
199 if (is_null($pluginfo)) {
203 $subplugins = $this->get_subplugins($disablecache);
205 if (!isset($subplugins[$pluginfo->component])) {
211 foreach ($subplugins[$pluginfo->component] as $subdata) {
212 foreach ($this->get_plugins_of_type($subdata->type) as $subpluginfo) {
213 $list[$subpluginfo->component] = $subpluginfo;
221 * Returns list of plugins that define their subplugins and the information
222 * about them from the db/subplugins.php file.
224 * @param bool $disablecache force reload, cache can be used otherwise
225 * @return array with keys like 'mod_quiz', and values the data from the
226 * corresponding db/subplugins.php file.
228 public function get_subplugins($disablecache=false) {
230 if ($disablecache or is_null($this->subpluginsinfo)) {
231 $this->subpluginsinfo = array();
232 foreach (core_component::get_plugin_types_with_subplugins() as $type => $ignored) {
233 foreach (core_component::get_plugin_list($type) as $component => $ownerdir) {
234 $componentsubplugins = array();
235 if (file_exists($ownerdir . '/db/subplugins.php')) {
236 $subplugins = array();
237 include($ownerdir . '/db/subplugins.php');
238 foreach ($subplugins as $subplugintype => $subplugintyperootdir) {
239 $subplugin = new stdClass();
240 $subplugin->type = $subplugintype;
241 $subplugin->typerootdir = $subplugintyperootdir;
242 $componentsubplugins[$subplugintype] = $subplugin;
244 $this->subpluginsinfo[$type . '_' . $component] = $componentsubplugins;
250 return $this->subpluginsinfo;
254 * Returns the name of the plugin that defines the given subplugin type
256 * If the given subplugin type is not actually a subplugin, returns false.
258 * @param string $subplugintype the name of subplugin type, eg. workshopform or quiz
259 * @return false|string the name of the parent plugin, eg. mod_workshop
261 public function get_parent_of_subplugin($subplugintype) {
264 foreach ($this->get_subplugins() as $pluginname => $subplugintypes) {
265 if (isset($subplugintypes[$subplugintype])) {
266 $parent = $pluginname;
275 * Returns a localized name of a given plugin
277 * @param string $component name of the plugin, eg mod_workshop or auth_ldap
280 public function plugin_name($component) {
282 $pluginfo = $this->get_plugin_info($component);
284 if (is_null($pluginfo)) {
285 throw new moodle_exception('err_unknown_plugin', 'core_plugin', '', array('plugin' => $component));
288 return $pluginfo->displayname;
292 * Returns a localized name of a plugin typed in singular form
294 * Most plugin types define their names in core_plugin lang file. In case of subplugins,
295 * we try to ask the parent plugin for the name. In the worst case, we will return
296 * the value of the passed $type parameter.
298 * @param string $type the type of the plugin, e.g. mod or workshopform
301 public function plugintype_name($type) {
303 if (get_string_manager()->string_exists('type_' . $type, 'core_plugin')) {
304 // for most plugin types, their names are defined in core_plugin lang file
305 return get_string('type_' . $type, 'core_plugin');
307 } else if ($parent = $this->get_parent_of_subplugin($type)) {
308 // if this is a subplugin, try to ask the parent plugin for the name
309 if (get_string_manager()->string_exists('subplugintype_' . $type, $parent)) {
310 return $this->plugin_name($parent) . ' / ' . get_string('subplugintype_' . $type, $parent);
312 return $this->plugin_name($parent) . ' / ' . $type;
321 * Returns a localized name of a plugin type in plural form
323 * Most plugin types define their names in core_plugin lang file. In case of subplugins,
324 * we try to ask the parent plugin for the name. In the worst case, we will return
325 * the value of the passed $type parameter.
327 * @param string $type the type of the plugin, e.g. mod or workshopform
330 public function plugintype_name_plural($type) {
332 if (get_string_manager()->string_exists('type_' . $type . '_plural', 'core_plugin')) {
333 // for most plugin types, their names are defined in core_plugin lang file
334 return get_string('type_' . $type . '_plural', 'core_plugin');
336 } else if ($parent = $this->get_parent_of_subplugin($type)) {
337 // if this is a subplugin, try to ask the parent plugin for the name
338 if (get_string_manager()->string_exists('subplugintype_' . $type . '_plural', $parent)) {
339 return $this->plugin_name($parent) . ' / ' . get_string('subplugintype_' . $type . '_plural', $parent);
341 return $this->plugin_name($parent) . ' / ' . $type;
350 * Returns information about the known plugin, or null
352 * @param string $component frankenstyle component name.
353 * @param bool $disablecache force reload, cache can be used otherwise
354 * @return plugininfo_base|null the corresponding plugin information.
356 public function get_plugin_info($component, $disablecache=false) {
357 list($type, $name) = $this->normalize_component($component);
358 $plugins = $this->get_plugins($disablecache);
359 if (isset($plugins[$type][$name])) {
360 return $plugins[$type][$name];
367 * Check to see if the current version of the plugin seems to be a checkout of an external repository.
369 * @see available_update_deployer::plugin_external_source()
370 * @param string $component frankenstyle component name
371 * @return false|string
373 public function plugin_external_source($component) {
375 $plugininfo = $this->get_plugin_info($component);
377 if (is_null($plugininfo)) {
381 $pluginroot = $plugininfo->rootdir;
383 if (is_dir($pluginroot.'/.git')) {
387 if (is_dir($pluginroot.'/CVS')) {
391 if (is_dir($pluginroot.'/.svn')) {
399 * Get a list of any other plugins that require this one.
400 * @param string $component frankenstyle component name.
401 * @return array of frankensyle component names that require this one.
403 public function other_plugins_that_require($component) {
405 foreach ($this->get_plugins() as $type => $plugins) {
406 foreach ($plugins as $plugin) {
407 $required = $plugin->get_other_required_plugins();
408 if (isset($required[$component])) {
409 $others[] = $plugin->component;
417 * Check a dependencies list against the list of installed plugins.
418 * @param array $dependencies compenent name to required version or ANY_VERSION.
419 * @return bool true if all the dependencies are satisfied.
421 public function are_dependencies_satisfied($dependencies) {
422 foreach ($dependencies as $component => $requiredversion) {
423 $otherplugin = $this->get_plugin_info($component);
424 if (is_null($otherplugin)) {
428 if ($requiredversion != ANY_VERSION and $otherplugin->versiondisk < $requiredversion) {
437 * Checks all dependencies for all installed plugins
439 * This is used by install and upgrade. The array passed by reference as the second
440 * argument is populated with the list of plugins that have failed dependencies (note that
441 * a single plugin can appear multiple times in the $failedplugins).
443 * @param int $moodleversion the version from version.php.
444 * @param array $failedplugins to return the list of plugins with non-satisfied dependencies
445 * @return bool true if all the dependencies are satisfied for all plugins.
447 public function all_plugins_ok($moodleversion, &$failedplugins = array()) {
450 foreach ($this->get_plugins() as $type => $plugins) {
451 foreach ($plugins as $plugin) {
453 if (!$plugin->is_core_dependency_satisfied($moodleversion)) {
455 $failedplugins[] = $plugin->component;
458 if (!$this->are_dependencies_satisfied($plugin->get_other_required_plugins())) {
460 $failedplugins[] = $plugin->component;
469 * Is it possible to uninstall the given plugin?
471 * False is returned if the plugininfo subclass declares the uninstall should
472 * not be allowed via {@link plugininfo_base::is_uninstall_allowed()} or if the
473 * core vetoes it (e.g. becase the plugin or some of its subplugins is required
474 * by some other installed plugin).
476 * @param string $component full frankenstyle name, e.g. mod_foobar
479 public function can_uninstall_plugin($component) {
481 $pluginfo = $this->get_plugin_info($component);
483 if (is_null($pluginfo)) {
487 if (!$this->common_uninstall_check($pluginfo)) {
491 // If it has subplugins, check they can be uninstalled too.
492 $subplugins = $this->get_subplugins_of_plugin($pluginfo->component);
493 foreach ($subplugins as $subpluginfo) {
494 if (!$this->common_uninstall_check($subpluginfo)) {
497 // Check if there are some other plugins requiring this subplugin
498 // (but the parent and siblings).
499 foreach ($this->other_plugins_that_require($subpluginfo->component) as $requiresme) {
500 $ismyparent = ($pluginfo->component === $requiresme);
501 $ismysibling = in_array($requiresme, array_keys($subplugins));
502 if (!$ismyparent and !$ismysibling) {
508 // Check if there are some other plugins requiring this plugin
509 // (but its subplugins).
510 foreach ($this->other_plugins_that_require($pluginfo->component) as $requiresme) {
511 $ismysubplugin = in_array($requiresme, array_keys($subplugins));
512 if (!$ismysubplugin) {
521 * Returns uninstall URL if exists.
523 * @param string $component
524 * @return moodle_url uninstall URL, null if uninstall not supported
526 public function get_uninstall_url($component) {
527 if (!$this->can_uninstall_plugin($component)) {
531 $pluginfo = $this->get_plugin_info($component);
533 if (is_null($pluginfo)) {
537 return $pluginfo->get_uninstall_url();
541 * Uninstall the given plugin.
543 * Automatically cleans-up all remaining configuration data, log records, events,
544 * files from the file pool etc.
546 * In the future, the functionality of {@link uninstall_plugin()} function may be moved
547 * into this method and all the code should be refactored to use it. At the moment, we
548 * mimic this future behaviour by wrapping that function call.
550 * @param string $component
551 * @param progress_trace $progress traces the process
552 * @return bool true on success, false on errors/problems
554 public function uninstall_plugin($component, progress_trace $progress) {
556 $pluginfo = $this->get_plugin_info($component);
558 if (is_null($pluginfo)) {
562 // Give the pluginfo class a chance to execute some steps.
563 $result = $pluginfo->uninstall($progress);
568 // Call the legacy core function to uninstall the plugin.
570 uninstall_plugin($pluginfo->type, $pluginfo->name);
571 $progress->output(ob_get_clean());
577 * Checks if there are some plugins with a known available update
579 * @return bool true if there is at least one available update
581 public function some_plugins_updatable() {
582 foreach ($this->get_plugins() as $type => $plugins) {
583 foreach ($plugins as $plugin) {
584 if ($plugin->available_updates()) {
594 * Check to see if the given plugin folder can be removed by the web server process.
596 * @param string $component full frankenstyle component
599 public function is_plugin_folder_removable($component) {
601 $pluginfo = $this->get_plugin_info($component);
603 if (is_null($pluginfo)) {
607 // To be able to remove the plugin folder, its parent must be writable, too.
608 if (!is_writable(dirname($pluginfo->rootdir))) {
612 // Check that the folder and all its content is writable (thence removable).
613 return $this->is_directory_removable($pluginfo->rootdir);
617 * Defines a list of all plugins that were originally shipped in the standard Moodle distribution,
618 * but are not anymore and are deleted during upgrades.
620 * The main purpose of this list is to hide missing plugins during upgrade.
622 * @param string $type plugin type
623 * @param string $name plugin name
626 public static function is_deleted_standard_plugin($type, $name) {
628 // Example of the array structure:
630 // 'block' => array('admin', 'admin_tree'),
631 // 'mod' => array('assignment'),
633 // Do not include plugins that were removed during upgrades to versions that are
634 // not supported as source versions for upgrade any more. For example, at MOODLE_23_STABLE
635 // branch, listed should be no plugins that were removed at 1.9.x - 2.1.x versions as
636 // Moodle 2.3 supports upgrades from 2.2.x only.
638 'qformat' => array('blackboard'),
641 if (!isset($plugins[$type])) {
644 return in_array($name, $plugins[$type]);
648 * Defines a white list of all plugins shipped in the standard Moodle distribution
650 * @param string $type
651 * @return false|array array of standard plugins or false if the type is unknown
653 public static function standard_plugins_list($type) {
654 $standard_plugins = array(
656 'assignment' => array(
657 'offline', 'online', 'upload', 'uploadsingle'
660 'assignsubmission' => array(
661 'comments', 'file', 'onlinetext'
664 'assignfeedback' => array(
665 'comments', 'file', 'offline'
669 'cas', 'db', 'email', 'fc', 'imap', 'ldap', 'manual', 'mnet',
670 'nntp', 'nologin', 'none', 'pam', 'pop3', 'radius',
671 'shibboleth', 'webservice'
675 'activity_modules', 'admin_bookmarks', 'badges', 'blog_menu',
676 'blog_recent', 'blog_tags', 'calendar_month',
677 'calendar_upcoming', 'comments', 'community',
678 'completionstatus', 'course_list', 'course_overview',
679 'course_summary', 'feedback', 'glossary_random', 'html',
680 'login', 'mentees', 'messages', 'mnet_hosts', 'myprofile',
681 'navigation', 'news_items', 'online_users', 'participants',
682 'private_files', 'quiz_results', 'recent_activity',
683 'rss_client', 'search_forums', 'section_links',
684 'selfcompletion', 'settings', 'site_main_menu',
685 'social_activities', 'tag_flickr', 'tag_youtube', 'tags'
689 'exportimscp', 'importhtml', 'print'
692 'cachelock' => array(
696 'cachestore' => array(
697 'file', 'memcache', 'memcached', 'mongodb', 'session', 'static'
700 'coursereport' => array(
704 'datafield' => array(
705 'checkbox', 'date', 'file', 'latlong', 'menu', 'multimenu',
706 'number', 'picture', 'radiobutton', 'text', 'textarea', 'url'
709 'datapreset' => array(
714 'textarea', 'tinymce'
718 'category', 'cohort', 'database', 'flatfile',
719 'guest', 'imsenterprise', 'ldap', 'manual', 'meta', 'mnet',
724 'activitynames', 'algebra', 'censor', 'emailprotect',
725 'emoticon', 'mediaplugin', 'multilang', 'tex', 'tidy',
726 'urltolink', 'data', 'glossary'
730 'scorm', 'social', 'topics', 'weeks'
733 'gradeexport' => array(
734 'ods', 'txt', 'xls', 'xml'
737 'gradeimport' => array(
741 'gradereport' => array(
742 'grader', 'outcomes', 'overview', 'user'
745 'gradingform' => array(
753 'email', 'jabber', 'popup'
756 'mnetservice' => array(
761 'assign', 'assignment', 'book', 'chat', 'choice', 'data', 'feedback', 'folder',
762 'forum', 'glossary', 'imscp', 'label', 'lesson', 'lti', 'page',
763 'quiz', 'resource', 'scorm', 'survey', 'url', 'wiki', 'workshop'
766 'plagiarism' => array(
769 'portfolio' => array(
770 'boxnet', 'download', 'flickr', 'googledocs', 'mahara', 'picasa'
773 'profilefield' => array(
774 'checkbox', 'datetime', 'menu', 'text', 'textarea'
777 'qbehaviour' => array(
778 'adaptive', 'adaptivenopenalty', 'deferredcbm',
779 'deferredfeedback', 'immediatecbm', 'immediatefeedback',
780 'informationitem', 'interactive', 'interactivecountback',
781 'manualgraded', 'missing'
785 'aiken', 'blackboard_six', 'examview', 'gift',
786 'learnwise', 'missingword', 'multianswer', 'webct',
791 'calculated', 'calculatedmulti', 'calculatedsimple',
792 'description', 'essay', 'match', 'missingtype', 'multianswer',
793 'multichoice', 'numerical', 'random', 'randomsamatch',
794 'shortanswer', 'truefalse'
798 'grading', 'overview', 'responses', 'statistics'
801 'quizaccess' => array(
802 'delaybetweenattempts', 'ipaddress', 'numattempts', 'openclosedate',
803 'password', 'safebrowser', 'securewindow', 'timelimit'
807 'backups', 'completion', 'configlog', 'courseoverview',
808 'log', 'loglive', 'outline', 'participation', 'progress', 'questioninstances', 'security', 'stats', 'performance'
811 'repository' => array(
812 'alfresco', 'boxnet', 'coursefiles', 'dropbox', 'equella', 'filesystem',
813 'flickr', 'flickr_public', 'googledocs', 'local', 'merlot',
814 'picasa', 'recent', 's3', 'upload', 'url', 'user', 'webdav',
815 'wikimedia', 'youtube'
818 'scormreport' => array(
825 'ctrlhelp', 'dragmath', 'moodleemoticon', 'moodleimage', 'moodlemedia', 'moodlenolink', 'spellchecker',
829 'afterburner', 'anomaly', 'arialist', 'base', 'binarius', 'bootstrapbase',
830 'boxxie', 'brick', 'canvas', 'clean', 'formal_white', 'formfactor',
831 'fusion', 'leatherbound', 'magazine', 'mymobile', 'nimble',
832 'nonzero', 'overlay', 'serenity', 'sky_high', 'splash',
833 'standard', 'standardold'
837 'assignmentupgrade', 'behat', 'capability', 'customlang',
838 'dbtransfer', 'generator', 'health', 'innodb', 'installaddon',
839 'langimport', 'multilangupgrade', 'phpunit', 'profiling',
840 'qeupgradehelper', 'replace', 'spamcleaner', 'timezoneimport',
841 'unittest', 'uploaduser', 'unsuproles', 'xmldb'
844 'webservice' => array(
845 'amf', 'rest', 'soap', 'xmlrpc'
848 'workshopallocation' => array(
849 'manual', 'random', 'scheduled'
852 'workshopeval' => array(
856 'workshopform' => array(
857 'accumulative', 'comments', 'numerrors', 'rubric'
861 if (isset($standard_plugins[$type])) {
862 return $standard_plugins[$type];
869 * Wrapper for the core function {@link normalize_component()}.
871 * This is here just to make it possible to mock it in unit tests.
873 * @param string $component
876 protected function normalize_component($component) {
877 return normalize_component($component);
881 * Reorders plugin types into a sequence to be displayed
883 * For technical reasons, plugin types returned by {@link get_plugin_types()} are
884 * in a certain order that does not need to fit the expected order for the display.
885 * Particularly, activity modules should be displayed first as they represent the
886 * real heart of Moodle. They should be followed by other plugin types that are
887 * used to build the courses (as that is what one expects from LMS). After that,
888 * other supportive plugin types follow.
890 * @param array $types associative array
891 * @return array same array with altered order of items
893 protected function reorder_plugin_types(array $types) {
895 'mod' => $types['mod'],
896 'block' => $types['block'],
897 'qtype' => $types['qtype'],
898 'qbehaviour' => $types['qbehaviour'],
899 'qformat' => $types['qformat'],
900 'filter' => $types['filter'],
901 'enrol' => $types['enrol'],
903 foreach ($types as $type => $path) {
904 if (!isset($fix[$type])) {
912 * Check if the given directory can be removed by the web server process.
914 * This recursively checks that the given directory and all its contents
917 * @param string $fullpath
920 protected function is_directory_removable($fullpath) {
922 if (!is_writable($fullpath)) {
926 if (is_dir($fullpath)) {
927 $handle = opendir($fullpath);
934 while ($filename = readdir($handle)) {
936 if ($filename === '.' or $filename === '..') {
940 $subfilepath = $fullpath.'/'.$filename;
942 if (is_dir($subfilepath)) {
943 $result = $result && $this->is_directory_removable($subfilepath);
946 $result = $result && is_writable($subfilepath);
956 * Helper method that implements common uninstall prerequisities
958 * @param plugininfo_base $pluginfo
961 protected function common_uninstall_check(plugininfo_base $pluginfo) {
963 if (!$pluginfo->is_uninstall_allowed()) {
964 // The plugin's plugininfo class declares it should not be uninstalled.
968 if ($pluginfo->get_status() === plugin_manager::PLUGIN_STATUS_NEW) {
969 // The plugin is not installed. It should be either installed or removed from the disk.
970 // Relying on this temporary state may be tricky.
974 if (is_null($pluginfo->get_uninstall_url())) {
975 // Backwards compatibility.
976 debugging('plugininfo_base subclasses should use is_uninstall_allowed() instead of returning null in get_uninstall_url()',
987 * General exception thrown by the {@link available_update_checker} class
989 class available_update_checker_exception extends moodle_exception {
992 * @param string $errorcode exception description identifier
993 * @param mixed $debuginfo debugging data to display
995 public function __construct($errorcode, $debuginfo=null) {
996 parent::__construct($errorcode, 'core_plugin', '', null, print_r($debuginfo, true));
1002 * Singleton class that handles checking for available updates
1004 class available_update_checker {
1006 /** @var available_update_checker holds the singleton instance */
1007 protected static $singletoninstance;
1008 /** @var null|int the timestamp of when the most recent response was fetched */
1009 protected $recentfetch = null;
1010 /** @var null|array the recent response from the update notification provider */
1011 protected $recentresponse = null;
1012 /** @var null|string the numerical version of the local Moodle code */
1013 protected $currentversion = null;
1014 /** @var null|string the release info of the local Moodle code */
1015 protected $currentrelease = null;
1016 /** @var null|string branch of the local Moodle code */
1017 protected $currentbranch = null;
1018 /** @var array of (string)frankestyle => (string)version list of additional plugins deployed at this site */
1019 protected $currentplugins = array();
1022 * Direct initiation not allowed, use the factory method {@link self::instance()}
1024 protected function __construct() {
1028 * Sorry, this is singleton
1030 protected function __clone() {
1034 * Factory method for this class
1036 * @return available_update_checker the singleton instance
1038 public static function instance() {
1039 if (is_null(self::$singletoninstance)) {
1040 self::$singletoninstance = new self();
1042 return self::$singletoninstance;
1047 * @param bool $phpunitreset
1049 public static function reset_caches($phpunitreset = false) {
1050 if ($phpunitreset) {
1051 self::$singletoninstance = null;
1056 * Returns the timestamp of the last execution of {@link fetch()}
1058 * @return int|null null if it has never been executed or we don't known
1060 public function get_last_timefetched() {
1062 $this->restore_response();
1064 if (!empty($this->recentfetch)) {
1065 return $this->recentfetch;
1073 * Fetches the available update status from the remote site
1075 * @throws available_update_checker_exception
1077 public function fetch() {
1078 $response = $this->get_response();
1079 $this->validate_response($response);
1080 $this->store_response($response);
1084 * Returns the available update information for the given component
1086 * This method returns null if the most recent response does not contain any information
1087 * about it. The returned structure is an array of available updates for the given
1088 * component. Each update info is an object with at least one property called
1089 * 'version'. Other possible properties are 'release', 'maturity', 'url' and 'downloadurl'.
1091 * For the 'core' component, the method returns real updates only (those with higher version).
1092 * For all other components, the list of all known remote updates is returned and the caller
1093 * (usually the {@link plugin_manager}) is supposed to make the actual comparison of versions.
1095 * @param string $component frankenstyle
1096 * @param array $options with supported keys 'minmaturity' and/or 'notifybuilds'
1097 * @return null|array null or array of available_update_info objects
1099 public function get_update_info($component, array $options = array()) {
1101 if (!isset($options['minmaturity'])) {
1102 $options['minmaturity'] = 0;
1105 if (!isset($options['notifybuilds'])) {
1106 $options['notifybuilds'] = false;
1109 if ($component == 'core') {
1110 $this->load_current_environment();
1113 $this->restore_response();
1115 if (empty($this->recentresponse['updates'][$component])) {
1120 foreach ($this->recentresponse['updates'][$component] as $info) {
1121 $update = new available_update_info($component, $info);
1122 if (isset($update->maturity) and ($update->maturity < $options['minmaturity'])) {
1125 if ($component == 'core') {
1126 if ($update->version <= $this->currentversion) {
1129 if (empty($options['notifybuilds']) and $this->is_same_release($update->release)) {
1133 $updates[] = $update;
1136 if (empty($updates)) {
1144 * The method being run via cron.php
1146 public function cron() {
1149 if (!$this->cron_autocheck_enabled()) {
1150 $this->cron_mtrace('Automatic check for available updates not enabled, skipping.');
1154 $now = $this->cron_current_timestamp();
1156 if ($this->cron_has_fresh_fetch($now)) {
1157 $this->cron_mtrace('Recently fetched info about available updates is still fresh enough, skipping.');
1161 if ($this->cron_has_outdated_fetch($now)) {
1162 $this->cron_mtrace('Outdated or missing info about available updates, forced fetching ... ', '');
1163 $this->cron_execute();
1167 $offset = $this->cron_execution_offset();
1168 $start = mktime(1, 0, 0, date('n', $now), date('j', $now), date('Y', $now)); // 01:00 AM today local time
1169 if ($now > $start + $offset) {
1170 $this->cron_mtrace('Regular daily check for available updates ... ', '');
1171 $this->cron_execute();
1176 /// end of public API //////////////////////////////////////////////////////
1179 * Makes cURL request to get data from the remote site
1181 * @return string raw request result
1182 * @throws available_update_checker_exception
1184 protected function get_response() {
1186 require_once($CFG->libdir.'/filelib.php');
1188 $curl = new curl(array('proxy' => true));
1189 $response = $curl->post($this->prepare_request_url(), $this->prepare_request_params(), $this->prepare_request_options());
1190 $curlerrno = $curl->get_errno();
1191 if (!empty($curlerrno)) {
1192 throw new available_update_checker_exception('err_response_curl', 'cURL error '.$curlerrno.': '.$curl->error);
1194 $curlinfo = $curl->get_info();
1195 if ($curlinfo['http_code'] != 200) {
1196 throw new available_update_checker_exception('err_response_http_code', $curlinfo['http_code']);
1202 * Makes sure the response is valid, has correct API format etc.
1204 * @param string $response raw response as returned by the {@link self::get_response()}
1205 * @throws available_update_checker_exception
1207 protected function validate_response($response) {
1209 $response = $this->decode_response($response);
1211 if (empty($response)) {
1212 throw new available_update_checker_exception('err_response_empty');
1215 if (empty($response['status']) or $response['status'] !== 'OK') {
1216 throw new available_update_checker_exception('err_response_status', $response['status']);
1219 if (empty($response['apiver']) or $response['apiver'] !== '1.2') {
1220 throw new available_update_checker_exception('err_response_format_version', $response['apiver']);
1223 if (empty($response['forbranch']) or $response['forbranch'] !== moodle_major_version(true)) {
1224 throw new available_update_checker_exception('err_response_target_version', $response['forbranch']);
1229 * Decodes the raw string response from the update notifications provider
1231 * @param string $response as returned by {@link self::get_response()}
1232 * @return array decoded response structure
1234 protected function decode_response($response) {
1235 return json_decode($response, true);
1239 * Stores the valid fetched response for later usage
1241 * This implementation uses the config_plugins table as the permanent storage.
1243 * @param string $response raw valid data returned by {@link self::get_response()}
1245 protected function store_response($response) {
1247 set_config('recentfetch', time(), 'core_plugin');
1248 set_config('recentresponse', $response, 'core_plugin');
1250 $this->restore_response(true);
1254 * Loads the most recent raw response record we have fetched
1256 * After this method is called, $this->recentresponse is set to an array. If the
1257 * array is empty, then either no data have been fetched yet or the fetched data
1258 * do not have expected format (and thence they are ignored and a debugging
1259 * message is displayed).
1261 * This implementation uses the config_plugins table as the permanent storage.
1263 * @param bool $forcereload reload even if it was already loaded
1265 protected function restore_response($forcereload = false) {
1267 if (!$forcereload and !is_null($this->recentresponse)) {
1268 // we already have it, nothing to do
1272 $config = get_config('core_plugin');
1274 if (!empty($config->recentresponse) and !empty($config->recentfetch)) {
1276 $this->validate_response($config->recentresponse);
1277 $this->recentfetch = $config->recentfetch;
1278 $this->recentresponse = $this->decode_response($config->recentresponse);
1279 } catch (available_update_checker_exception $e) {
1280 // The server response is not valid. Behave as if no data were fetched yet.
1281 // This may happen when the most recent update info (cached locally) has been
1282 // fetched with the previous branch of Moodle (like during an upgrade from 2.x
1283 // to 2.y) or when the API of the response has changed.
1284 $this->recentresponse = array();
1288 $this->recentresponse = array();
1293 * Compares two raw {@link $recentresponse} records and returns the list of changed updates
1295 * This method is used to populate potential update info to be sent to site admins.
1299 * @throws available_update_checker_exception
1300 * @return array parts of $new['updates'] that have changed
1302 protected function compare_responses(array $old, array $new) {
1308 if (!array_key_exists('updates', $new)) {
1309 throw new available_update_checker_exception('err_response_format');
1313 return $new['updates'];
1316 if (!array_key_exists('updates', $old)) {
1317 throw new available_update_checker_exception('err_response_format');
1322 foreach ($new['updates'] as $newcomponent => $newcomponentupdates) {
1323 if (empty($old['updates'][$newcomponent])) {
1324 $changes[$newcomponent] = $newcomponentupdates;
1327 foreach ($newcomponentupdates as $newcomponentupdate) {
1329 foreach ($old['updates'][$newcomponent] as $oldcomponentupdate) {
1330 if ($newcomponentupdate['version'] == $oldcomponentupdate['version']) {
1335 if (!isset($changes[$newcomponent])) {
1336 $changes[$newcomponent] = array();
1338 $changes[$newcomponent][] = $newcomponentupdate;
1347 * Returns the URL to send update requests to
1349 * During the development or testing, you can set $CFG->alternativeupdateproviderurl
1350 * to a custom URL that will be used. Otherwise the standard URL will be returned.
1352 * @return string URL
1354 protected function prepare_request_url() {
1357 if (!empty($CFG->config_php_settings['alternativeupdateproviderurl'])) {
1358 return $CFG->config_php_settings['alternativeupdateproviderurl'];
1360 return 'https://download.moodle.org/api/1.2/updates.php';
1365 * Sets the properties currentversion, currentrelease, currentbranch and currentplugins
1367 * @param bool $forcereload
1369 protected function load_current_environment($forcereload=false) {
1372 if (!is_null($this->currentversion) and !$forcereload) {
1380 require($CFG->dirroot.'/version.php');
1381 $this->currentversion = $version;
1382 $this->currentrelease = $release;
1383 $this->currentbranch = moodle_major_version(true);
1385 $pluginman = plugin_manager::instance();
1386 foreach ($pluginman->get_plugins() as $type => $plugins) {
1387 foreach ($plugins as $plugin) {
1388 if (!$plugin->is_standard()) {
1389 $this->currentplugins[$plugin->component] = $plugin->versiondisk;
1396 * Returns the list of HTTP params to be sent to the updates provider URL
1398 * @return array of (string)param => (string)value
1400 protected function prepare_request_params() {
1403 $this->load_current_environment();
1404 $this->restore_response();
1407 $params['format'] = 'json';
1409 if (isset($this->recentresponse['ticket'])) {
1410 $params['ticket'] = $this->recentresponse['ticket'];
1413 if (isset($this->currentversion)) {
1414 $params['version'] = $this->currentversion;
1416 throw new coding_exception('Main Moodle version must be already known here');
1419 if (isset($this->currentbranch)) {
1420 $params['branch'] = $this->currentbranch;
1422 throw new coding_exception('Moodle release must be already known here');
1426 foreach ($this->currentplugins as $plugin => $version) {
1427 $plugins[] = $plugin.'@'.$version;
1429 if (!empty($plugins)) {
1430 $params['plugins'] = implode(',', $plugins);
1437 * Returns the list of cURL options to use when fetching available updates data
1439 * @return array of (string)param => (string)value
1441 protected function prepare_request_options() {
1445 'CURLOPT_SSL_VERIFYHOST' => 2, // this is the default in {@link curl} class but just in case
1446 'CURLOPT_SSL_VERIFYPEER' => true,
1453 * Returns the current timestamp
1455 * @return int the timestamp
1457 protected function cron_current_timestamp() {
1462 * Output cron debugging info
1465 * @param string $msg output message
1466 * @param string $eol end of line
1468 protected function cron_mtrace($msg, $eol = PHP_EOL) {
1473 * Decide if the autocheck feature is disabled in the server setting
1475 * @return bool true if autocheck enabled, false if disabled
1477 protected function cron_autocheck_enabled() {
1480 if (empty($CFG->updateautocheck)) {
1488 * Decide if the recently fetched data are still fresh enough
1490 * @param int $now current timestamp
1491 * @return bool true if no need to re-fetch, false otherwise
1493 protected function cron_has_fresh_fetch($now) {
1494 $recent = $this->get_last_timefetched();
1496 if (empty($recent)) {
1500 if ($now < $recent) {
1501 $this->cron_mtrace('The most recent fetch is reported to be in the future, this is weird!');
1505 if ($now - $recent > 24 * HOURSECS) {
1513 * Decide if the fetch is outadated or even missing
1515 * @param int $now current timestamp
1516 * @return bool false if no need to re-fetch, true otherwise
1518 protected function cron_has_outdated_fetch($now) {
1519 $recent = $this->get_last_timefetched();
1521 if (empty($recent)) {
1525 if ($now < $recent) {
1526 $this->cron_mtrace('The most recent fetch is reported to be in the future, this is weird!');
1530 if ($now - $recent > 48 * HOURSECS) {
1538 * Returns the cron execution offset for this site
1540 * The main {@link self::cron()} is supposed to run every night in some random time
1541 * between 01:00 and 06:00 AM (local time). The exact moment is defined by so called
1542 * execution offset, that is the amount of time after 01:00 AM. The offset value is
1543 * initially generated randomly and then used consistently at the site. This way, the
1544 * regular checks against the download.moodle.org server are spread in time.
1546 * @return int the offset number of seconds from range 1 sec to 5 hours
1548 protected function cron_execution_offset() {
1551 if (empty($CFG->updatecronoffset)) {
1552 set_config('updatecronoffset', rand(1, 5 * HOURSECS));
1555 return $CFG->updatecronoffset;
1559 * Fetch available updates info and eventually send notification to site admins
1561 protected function cron_execute() {
1564 $this->restore_response();
1565 $previous = $this->recentresponse;
1567 $this->restore_response(true);
1568 $current = $this->recentresponse;
1569 $changes = $this->compare_responses($previous, $current);
1570 $notifications = $this->cron_notifications($changes);
1571 $this->cron_notify($notifications);
1572 $this->cron_mtrace('done');
1573 } catch (available_update_checker_exception $e) {
1574 $this->cron_mtrace('FAILED!');
1579 * Given the list of changes in available updates, pick those to send to site admins
1581 * @param array $changes as returned by {@link self::compare_responses()}
1582 * @return array of available_update_info objects to send to site admins
1584 protected function cron_notifications(array $changes) {
1587 $notifications = array();
1588 $pluginman = plugin_manager::instance();
1589 $plugins = $pluginman->get_plugins(true);
1591 foreach ($changes as $component => $componentchanges) {
1592 if (empty($componentchanges)) {
1595 $componentupdates = $this->get_update_info($component,
1596 array('minmaturity' => $CFG->updateminmaturity, 'notifybuilds' => $CFG->updatenotifybuilds));
1597 if (empty($componentupdates)) {
1600 // notify only about those $componentchanges that are present in $componentupdates
1601 // to respect the preferences
1602 foreach ($componentchanges as $componentchange) {
1603 foreach ($componentupdates as $componentupdate) {
1604 if ($componentupdate->version == $componentchange['version']) {
1605 if ($component == 'core') {
1606 // In case of 'core', we already know that the $componentupdate
1607 // is a real update with higher version ({@see self::get_update_info()}).
1608 // We just perform additional check for the release property as there
1609 // can be two Moodle releases having the same version (e.g. 2.4.0 and 2.5dev shortly
1610 // after the release). We can do that because we have the release info
1611 // always available for the core.
1612 if ((string)$componentupdate->release === (string)$componentchange['release']) {
1613 $notifications[] = $componentupdate;
1616 // Use the plugin_manager to check if the detected $componentchange
1617 // is a real update with higher version. That is, the $componentchange
1618 // is present in the array of {@link available_update_info} objects
1619 // returned by the plugin's available_updates() method.
1620 list($plugintype, $pluginname) = normalize_component($component);
1621 if (!empty($plugins[$plugintype][$pluginname])) {
1622 $availableupdates = $plugins[$plugintype][$pluginname]->available_updates();
1623 if (!empty($availableupdates)) {
1624 foreach ($availableupdates as $availableupdate) {
1625 if ($availableupdate->version == $componentchange['version']) {
1626 $notifications[] = $componentupdate;
1637 return $notifications;
1641 * Sends the given notifications to site admins via messaging API
1643 * @param array $notifications array of available_update_info objects to send
1645 protected function cron_notify(array $notifications) {
1648 if (empty($notifications)) {
1652 $admins = get_admins();
1654 if (empty($admins)) {
1658 $this->cron_mtrace('sending notifications ... ', '');
1660 $text = get_string('updatenotifications', 'core_admin') . PHP_EOL;
1661 $html = html_writer::tag('h1', get_string('updatenotifications', 'core_admin')) . PHP_EOL;
1663 $coreupdates = array();
1664 $pluginupdates = array();
1666 foreach ($notifications as $notification) {
1667 if ($notification->component == 'core') {
1668 $coreupdates[] = $notification;
1670 $pluginupdates[] = $notification;
1674 if (!empty($coreupdates)) {
1675 $text .= PHP_EOL . get_string('updateavailable', 'core_admin') . PHP_EOL;
1676 $html .= html_writer::tag('h2', get_string('updateavailable', 'core_admin')) . PHP_EOL;
1677 $html .= html_writer::start_tag('ul') . PHP_EOL;
1678 foreach ($coreupdates as $coreupdate) {
1679 $html .= html_writer::start_tag('li');
1680 if (isset($coreupdate->release)) {
1681 $text .= get_string('updateavailable_release', 'core_admin', $coreupdate->release);
1682 $html .= html_writer::tag('strong', get_string('updateavailable_release', 'core_admin', $coreupdate->release));
1684 if (isset($coreupdate->version)) {
1685 $text .= ' '.get_string('updateavailable_version', 'core_admin', $coreupdate->version);
1686 $html .= ' '.get_string('updateavailable_version', 'core_admin', $coreupdate->version);
1688 if (isset($coreupdate->maturity)) {
1689 $text .= ' ('.get_string('maturity'.$coreupdate->maturity, 'core_admin').')';
1690 $html .= ' ('.get_string('maturity'.$coreupdate->maturity, 'core_admin').')';
1693 $html .= html_writer::end_tag('li') . PHP_EOL;
1696 $html .= html_writer::end_tag('ul') . PHP_EOL;
1698 $a = array('url' => $CFG->wwwroot.'/'.$CFG->admin.'/index.php');
1699 $text .= get_string('updateavailabledetailslink', 'core_admin', $a) . PHP_EOL;
1700 $a = array('url' => html_writer::link($CFG->wwwroot.'/'.$CFG->admin.'/index.php', $CFG->wwwroot.'/'.$CFG->admin.'/index.php'));
1701 $html .= html_writer::tag('p', get_string('updateavailabledetailslink', 'core_admin', $a)) . PHP_EOL;
1704 if (!empty($pluginupdates)) {
1705 $text .= PHP_EOL . get_string('updateavailableforplugin', 'core_admin') . PHP_EOL;
1706 $html .= html_writer::tag('h2', get_string('updateavailableforplugin', 'core_admin')) . PHP_EOL;
1708 $html .= html_writer::start_tag('ul') . PHP_EOL;
1709 foreach ($pluginupdates as $pluginupdate) {
1710 $html .= html_writer::start_tag('li');
1711 $text .= get_string('pluginname', $pluginupdate->component);
1712 $html .= html_writer::tag('strong', get_string('pluginname', $pluginupdate->component));
1714 $text .= ' ('.$pluginupdate->component.')';
1715 $html .= ' ('.$pluginupdate->component.')';
1717 $text .= ' '.get_string('updateavailable', 'core_plugin', $pluginupdate->version);
1718 $html .= ' '.get_string('updateavailable', 'core_plugin', $pluginupdate->version);
1721 $html .= html_writer::end_tag('li') . PHP_EOL;
1724 $html .= html_writer::end_tag('ul') . PHP_EOL;
1726 $a = array('url' => $CFG->wwwroot.'/'.$CFG->admin.'/plugins.php');
1727 $text .= get_string('updateavailabledetailslink', 'core_admin', $a) . PHP_EOL;
1728 $a = array('url' => html_writer::link($CFG->wwwroot.'/'.$CFG->admin.'/plugins.php', $CFG->wwwroot.'/'.$CFG->admin.'/plugins.php'));
1729 $html .= html_writer::tag('p', get_string('updateavailabledetailslink', 'core_admin', $a)) . PHP_EOL;
1732 $a = array('siteurl' => $CFG->wwwroot);
1733 $text .= get_string('updatenotificationfooter', 'core_admin', $a) . PHP_EOL;
1734 $a = array('siteurl' => html_writer::link($CFG->wwwroot, $CFG->wwwroot));
1735 $html .= html_writer::tag('footer', html_writer::tag('p', get_string('updatenotificationfooter', 'core_admin', $a),
1736 array('style' => 'font-size:smaller; color:#333;')));
1738 foreach ($admins as $admin) {
1739 $message = new stdClass();
1740 $message->component = 'moodle';
1741 $message->name = 'availableupdate';
1742 $message->userfrom = get_admin();
1743 $message->userto = $admin;
1744 $message->subject = get_string('updatenotificationsubject', 'core_admin', array('siteurl' => $CFG->wwwroot));
1745 $message->fullmessage = $text;
1746 $message->fullmessageformat = FORMAT_PLAIN;
1747 $message->fullmessagehtml = $html;
1748 $message->smallmessage = get_string('updatenotifications', 'core_admin');
1749 $message->notification = 1;
1750 message_send($message);
1755 * Compare two release labels and decide if they are the same
1757 * @param string $remote release info of the available update
1758 * @param null|string $local release info of the local code, defaults to $release defined in version.php
1759 * @return boolean true if the releases declare the same minor+major version
1761 protected function is_same_release($remote, $local=null) {
1763 if (is_null($local)) {
1764 $this->load_current_environment();
1765 $local = $this->currentrelease;
1768 $pattern = '/^([0-9\.\+]+)([^(]*)/';
1770 preg_match($pattern, $remote, $remotematches);
1771 preg_match($pattern, $local, $localmatches);
1773 $remotematches[1] = str_replace('+', '', $remotematches[1]);
1774 $localmatches[1] = str_replace('+', '', $localmatches[1]);
1776 if ($remotematches[1] === $localmatches[1] and rtrim($remotematches[2]) === rtrim($localmatches[2])) {
1786 * Defines the structure of objects returned by {@link available_update_checker::get_update_info()}
1788 class available_update_info {
1790 /** @var string frankenstyle component name */
1792 /** @var int the available version of the component */
1794 /** @var string|null optional release name */
1795 public $release = null;
1796 /** @var int|null optional maturity info, eg {@link MATURITY_STABLE} */
1797 public $maturity = null;
1798 /** @var string|null optional URL of a page with more info about the update */
1800 /** @var string|null optional URL of a ZIP package that can be downloaded and installed */
1801 public $download = null;
1802 /** @var string|null of self::download is set, then this must be the MD5 hash of the ZIP */
1803 public $downloadmd5 = null;
1806 * Creates new instance of the class
1808 * The $info array must provide at least the 'version' value and optionally all other
1809 * values to populate the object's properties.
1811 * @param string $name the frankenstyle component name
1812 * @param array $info associative array with other properties
1814 public function __construct($name, array $info) {
1815 $this->component = $name;
1816 foreach ($info as $k => $v) {
1817 if (property_exists('available_update_info', $k) and $k != 'component') {
1826 * Implements a communication bridge to the mdeploy.php utility
1828 class available_update_deployer {
1830 const HTTP_PARAM_PREFIX = 'updteautodpldata_'; // Hey, even Google has not heard of such a prefix! So it MUST be safe :-p
1831 const HTTP_PARAM_CHECKER = 'datapackagesize'; // Name of the parameter that holds the number of items in the received data items
1833 /** @var available_update_deployer holds the singleton instance */
1834 protected static $singletoninstance;
1835 /** @var moodle_url URL of a page that includes the deployer UI */
1836 protected $callerurl;
1837 /** @var moodle_url URL to return after the deployment */
1838 protected $returnurl;
1841 * Direct instantiation not allowed, use the factory method {@link self::instance()}
1843 protected function __construct() {
1847 * Sorry, this is singleton
1849 protected function __clone() {
1853 * Factory method for this class
1855 * @return available_update_deployer the singleton instance
1857 public static function instance() {
1858 if (is_null(self::$singletoninstance)) {
1859 self::$singletoninstance = new self();
1861 return self::$singletoninstance;
1865 * Reset caches used by this script
1867 * @param bool $phpunitreset is this called as a part of PHPUnit reset?
1869 public static function reset_caches($phpunitreset = false) {
1870 if ($phpunitreset) {
1871 self::$singletoninstance = null;
1876 * Is automatic deployment enabled?
1880 public function enabled() {
1883 if (!empty($CFG->disableupdateautodeploy)) {
1884 // The feature is prohibited via config.php
1888 return get_config('updateautodeploy');
1892 * Sets some base properties of the class to make it usable.
1894 * @param moodle_url $callerurl the base URL of a script that will handle the class'es form data
1895 * @param moodle_url $returnurl the final URL to return to when the deployment is finished
1897 public function initialize(moodle_url $callerurl, moodle_url $returnurl) {
1899 if (!$this->enabled()) {
1900 throw new coding_exception('Unable to initialize the deployer, the feature is not enabled.');
1903 $this->callerurl = $callerurl;
1904 $this->returnurl = $returnurl;
1908 * Has the deployer been initialized?
1910 * Initialized deployer means that the following properties were set:
1911 * callerurl, returnurl
1915 public function initialized() {
1917 if (!$this->enabled()) {
1921 if (empty($this->callerurl)) {
1925 if (empty($this->returnurl)) {
1933 * Returns a list of reasons why the deployment can not happen
1935 * If the returned array is empty, the deployment seems to be possible. The returned
1936 * structure is an associative array with keys representing individual impediments.
1937 * Possible keys are: missingdownloadurl, missingdownloadmd5, notwritable.
1939 * @param available_update_info $info
1942 public function deployment_impediments(available_update_info $info) {
1944 $impediments = array();
1946 if (empty($info->download)) {
1947 $impediments['missingdownloadurl'] = true;
1950 if (empty($info->downloadmd5)) {
1951 $impediments['missingdownloadmd5'] = true;
1954 if (!empty($info->download) and !$this->update_downloadable($info->download)) {
1955 $impediments['notdownloadable'] = true;
1958 if (!$this->component_writable($info->component)) {
1959 $impediments['notwritable'] = true;
1962 return $impediments;
1966 * Check to see if the current version of the plugin seems to be a checkout of an external repository.
1968 * @see plugin_manager::plugin_external_source()
1969 * @param available_update_info $info
1970 * @return false|string
1972 public function plugin_external_source(available_update_info $info) {
1974 $paths = get_plugin_types(true);
1975 list($plugintype, $pluginname) = normalize_component($info->component);
1976 $pluginroot = $paths[$plugintype].'/'.$pluginname;
1978 if (is_dir($pluginroot.'/.git')) {
1982 if (is_dir($pluginroot.'/CVS')) {
1986 if (is_dir($pluginroot.'/.svn')) {
1994 * Prepares a renderable widget to confirm installation of an available update.
1996 * @param available_update_info $info component version to deploy
1997 * @return renderable
1999 public function make_confirm_widget(available_update_info $info) {
2001 if (!$this->initialized()) {
2002 throw new coding_exception('Illegal method call - deployer not initialized.');
2005 $params = $this->data_to_params(array(
2006 'updateinfo' => (array)$info, // see http://www.php.net/manual/en/language.types.array.php#language.types.array.casting
2009 $widget = new single_button(
2010 new moodle_url($this->callerurl, $params),
2011 get_string('updateavailableinstall', 'core_admin'),
2019 * Prepares a renderable widget to execute installation of an available update.
2021 * @param available_update_info $info component version to deploy
2022 * @param moodle_url $returnurl URL to return after the installation execution
2023 * @return renderable
2025 public function make_execution_widget(available_update_info $info, moodle_url $returnurl = null) {
2028 if (!$this->initialized()) {
2029 throw new coding_exception('Illegal method call - deployer not initialized.');
2032 $pluginrootpaths = get_plugin_types(true);
2034 list($plugintype, $pluginname) = normalize_component($info->component);
2036 if (empty($pluginrootpaths[$plugintype])) {
2037 throw new coding_exception('Unknown plugin type root location', $plugintype);
2040 list($passfile, $password) = $this->prepare_authorization();
2042 if (is_null($returnurl)) {
2043 $returnurl = new moodle_url('/admin');
2045 $returnurl = $returnurl;
2050 'type' => $plugintype,
2051 'name' => $pluginname,
2052 'typeroot' => $pluginrootpaths[$plugintype],
2053 'package' => $info->download,
2054 'md5' => $info->downloadmd5,
2055 'dataroot' => $CFG->dataroot,
2056 'dirroot' => $CFG->dirroot,
2057 'passfile' => $passfile,
2058 'password' => $password,
2059 'returnurl' => $returnurl->out(false),
2062 if (!empty($CFG->proxyhost)) {
2063 // MDL-36973 - Beware - we should call just !is_proxybypass() here. But currently, our
2064 // cURL wrapper class does not do it. So, to have consistent behaviour, we pass proxy
2065 // setting regardless the $CFG->proxybypass setting. Once the {@link curl} class is
2066 // fixed, the condition should be amended.
2067 if (true or !is_proxybypass($info->download)) {
2068 if (empty($CFG->proxyport)) {
2069 $params['proxy'] = $CFG->proxyhost;
2071 $params['proxy'] = $CFG->proxyhost.':'.$CFG->proxyport;
2074 if (!empty($CFG->proxyuser) and !empty($CFG->proxypassword)) {
2075 $params['proxyuserpwd'] = $CFG->proxyuser.':'.$CFG->proxypassword;
2078 if (!empty($CFG->proxytype)) {
2079 $params['proxytype'] = $CFG->proxytype;
2084 $widget = new single_button(
2085 new moodle_url('/mdeploy.php', $params),
2086 get_string('updateavailableinstall', 'core_admin'),
2094 * Returns array of data objects passed to this tool.
2098 public function submitted_data() {
2100 $data = $this->params_to_data($_POST);
2102 if (empty($data) or empty($data[self::HTTP_PARAM_CHECKER])) {
2106 if (!empty($data['updateinfo']) and is_object($data['updateinfo'])) {
2107 $updateinfo = $data['updateinfo'];
2108 if (!empty($updateinfo->component) and !empty($updateinfo->version)) {
2109 $data['updateinfo'] = new available_update_info($updateinfo->component, (array)$updateinfo);
2113 if (!empty($data['callerurl'])) {
2114 $data['callerurl'] = new moodle_url($data['callerurl']);
2117 if (!empty($data['returnurl'])) {
2118 $data['returnurl'] = new moodle_url($data['returnurl']);
2125 * Handles magic getters and setters for protected properties.
2127 * @param string $name method name, e.g. set_returnurl()
2128 * @param array $arguments arguments to be passed to the array
2130 public function __call($name, array $arguments = array()) {
2132 if (substr($name, 0, 4) === 'set_') {
2133 $property = substr($name, 4);
2134 if (empty($property)) {
2135 throw new coding_exception('Invalid property name (empty)');
2137 if (empty($arguments)) {
2138 $arguments = array(true); // Default value for flag-like properties.
2140 // Make sure it is a protected property.
2141 $isprotected = false;
2142 $reflection = new ReflectionObject($this);
2143 foreach ($reflection->getProperties(ReflectionProperty::IS_PROTECTED) as $reflectionproperty) {
2144 if ($reflectionproperty->getName() === $property) {
2145 $isprotected = true;
2149 if (!$isprotected) {
2150 throw new coding_exception('Unable to set property - it does not exist or it is not protected');
2152 $value = reset($arguments);
2153 $this->$property = $value;
2157 if (substr($name, 0, 4) === 'get_') {
2158 $property = substr($name, 4);
2159 if (empty($property)) {
2160 throw new coding_exception('Invalid property name (empty)');
2162 if (!empty($arguments)) {
2163 throw new coding_exception('No parameter expected');
2165 // Make sure it is a protected property.
2166 $isprotected = false;
2167 $reflection = new ReflectionObject($this);
2168 foreach ($reflection->getProperties(ReflectionProperty::IS_PROTECTED) as $reflectionproperty) {
2169 if ($reflectionproperty->getName() === $property) {
2170 $isprotected = true;
2174 if (!$isprotected) {
2175 throw new coding_exception('Unable to get property - it does not exist or it is not protected');
2177 return $this->$property;
2182 * Generates a random token and stores it in a file in moodledata directory.
2184 * @return array of the (string)filename and (string)password in this order
2186 public function prepare_authorization() {
2189 make_upload_directory('mdeploy/auth/');
2194 while (!$success and $attempts < 5) {
2197 $passfile = $this->generate_passfile();
2198 $password = $this->generate_password();
2201 $filepath = $CFG->dataroot.'/mdeploy/auth/'.$passfile;
2203 if (!file_exists($filepath)) {
2204 $success = file_put_contents($filepath, $password . PHP_EOL . $now . PHP_EOL, LOCK_EX);
2209 return array($passfile, $password);
2212 throw new moodle_exception('unable_prepare_authorization', 'core_plugin');
2216 // End of external API
2219 * Prepares an array of HTTP parameters that can be passed to another page.
2221 * @param array|object $data associative array or an object holding the data, data JSON-able
2222 * @return array suitable as a param for moodle_url
2224 protected function data_to_params($data) {
2226 // Append some our own data
2227 if (!empty($this->callerurl)) {
2228 $data['callerurl'] = $this->callerurl->out(false);
2230 if (!empty($this->returnurl)) {
2231 $data['returnurl'] = $this->returnurl->out(false);
2234 // Finally append the count of items in the package.
2235 $data[self::HTTP_PARAM_CHECKER] = count($data);
2239 foreach ($data as $name => $value) {
2240 $transname = self::HTTP_PARAM_PREFIX.$name;
2241 $transvalue = json_encode($value);
2242 $params[$transname] = $transvalue;
2249 * Converts HTTP parameters passed to the script into native PHP data
2251 * @param array $params such as $_REQUEST or $_POST
2252 * @return array data passed for this class
2254 protected function params_to_data(array $params) {
2256 if (empty($params)) {
2261 foreach ($params as $name => $value) {
2262 if (strpos($name, self::HTTP_PARAM_PREFIX) === 0) {
2263 $realname = substr($name, strlen(self::HTTP_PARAM_PREFIX));
2264 $realvalue = json_decode($value);
2265 $data[$realname] = $realvalue;
2273 * Returns a random string to be used as a filename of the password storage.
2277 protected function generate_passfile() {
2278 return clean_param(uniqid('mdeploy_', true), PARAM_FILE);
2282 * Returns a random string to be used as the authorization token
2286 protected function generate_password() {
2287 return complex_random_string();
2291 * Checks if the given component's directory is writable
2293 * For the purpose of the deployment, the web server process has to have
2294 * write access to all files in the component's directory (recursively) and for the
2297 * @see worker::move_directory_source_precheck()
2298 * @param string $component normalized component name
2301 protected function component_writable($component) {
2303 list($plugintype, $pluginname) = normalize_component($component);
2305 $directory = get_plugin_directory($plugintype, $pluginname);
2307 if (is_null($directory)) {
2308 throw new coding_exception('Unknown component location', $component);
2311 return $this->directory_writable($directory);
2315 * Checks if the mdeploy.php will be able to fetch the ZIP from the given URL
2317 * This is mainly supposed to check if the transmission over HTTPS would
2318 * work. That is, if the CA certificates are present at the server.
2320 * @param string $downloadurl the URL of the ZIP package to download
2323 protected function update_downloadable($downloadurl) {
2326 $curloptions = array(
2327 'CURLOPT_SSL_VERIFYHOST' => 2, // this is the default in {@link curl} class but just in case
2328 'CURLOPT_SSL_VERIFYPEER' => true,
2331 $curl = new curl(array('proxy' => true));
2332 $result = $curl->head($downloadurl, $curloptions);
2333 $errno = $curl->get_errno();
2334 if (empty($errno)) {
2342 * Checks if the directory and all its contents (recursively) is writable
2344 * @param string $path full path to a directory
2347 private function directory_writable($path) {
2349 if (!is_writable($path)) {
2353 if (is_dir($path)) {
2354 $handle = opendir($path);
2361 while ($filename = readdir($handle)) {
2362 $filepath = $path.'/'.$filename;
2364 if ($filename === '.' or $filename === '..') {
2368 if (is_dir($filepath)) {
2369 $result = $result && $this->directory_writable($filepath);
2372 $result = $result && is_writable($filepath);
2384 * Factory class producing required subclasses of {@link plugininfo_base}
2386 class plugininfo_default_factory {
2389 * Makes a new instance of the plugininfo class
2391 * @param string $type the plugin type, eg. 'mod'
2392 * @param string $typerootdir full path to the location of all the plugins of this type
2393 * @param string $name the plugin name, eg. 'workshop'
2394 * @param string $namerootdir full path to the location of the plugin
2395 * @param string $typeclass the name of class that holds the info about the plugin
2396 * @return plugininfo_base the instance of $typeclass
2398 public static function make($type, $typerootdir, $name, $namerootdir, $typeclass) {
2399 $plugin = new $typeclass();
2400 $plugin->type = $type;
2401 $plugin->typerootdir = $typerootdir;
2402 $plugin->name = $name;
2403 $plugin->rootdir = $namerootdir;
2405 $plugin->init_display_name();
2406 $plugin->load_disk_version();
2407 $plugin->load_db_version();
2408 $plugin->load_required_main_version();
2409 $plugin->init_is_standard();
2417 * Base class providing access to the information about a plugin
2419 * @property-read string component the component name, type_name
2421 abstract class plugininfo_base {
2423 /** @var string the plugintype name, eg. mod, auth or workshopform */
2425 /** @var string full path to the location of all the plugins of this type */
2426 public $typerootdir;
2427 /** @var string the plugin name, eg. assignment, ldap */
2429 /** @var string the localized plugin name */
2430 public $displayname;
2431 /** @var string the plugin source, one of plugin_manager::PLUGIN_SOURCE_xxx constants */
2433 /** @var fullpath to the location of this plugin */
2435 /** @var int|string the version of the plugin's source code */
2436 public $versiondisk;
2437 /** @var int|string the version of the installed plugin */
2439 /** @var int|float|string required version of Moodle core */
2440 public $versionrequires;
2441 /** @var array other plugins that this one depends on, lazy-loaded by {@link get_other_required_plugins()} */
2442 public $dependencies;
2443 /** @var int number of instances of the plugin - not supported yet */
2445 /** @var int order of the plugin among other plugins of the same type - not supported yet */
2447 /** @var array|null array of {@link available_update_info} for this plugin */
2448 public $availableupdates;
2451 * Gathers and returns the information about all plugins of the given type
2453 * @param string $type the name of the plugintype, eg. mod, auth or workshopform
2454 * @param string $typerootdir full path to the location of the plugin dir
2455 * @param string $typeclass the name of the actually called class
2456 * @return array of plugintype classes, indexed by the plugin name
2458 public static function get_plugins($type, $typerootdir, $typeclass) {
2460 // get the information about plugins at the disk
2461 $plugins = get_plugin_list($type);
2463 foreach ($plugins as $pluginname => $pluginrootdir) {
2464 $ondisk[$pluginname] = plugininfo_default_factory::make($type, $typerootdir,
2465 $pluginname, $pluginrootdir, $typeclass);
2471 * Sets {@link $displayname} property to a localized name of the plugin
2473 public function init_display_name() {
2474 if (!get_string_manager()->string_exists('pluginname', $this->component)) {
2475 $this->displayname = '[pluginname,' . $this->component . ']';
2477 $this->displayname = get_string('pluginname', $this->component);
2482 * Magic method getter, redirects to read only values.
2484 * @param string $name
2487 public function __get($name) {
2489 case 'component': return $this->type . '_' . $this->name;
2492 debugging('Invalid plugin property accessed! '.$name);
2498 * Return the full path name of a file within the plugin.
2500 * No check is made to see if the file exists.
2502 * @param string $relativepath e.g. 'version.php'.
2503 * @return string e.g. $CFG->dirroot . '/mod/quiz/version.php'.
2505 public function full_path($relativepath) {
2506 if (empty($this->rootdir)) {
2509 return $this->rootdir . '/' . $relativepath;
2513 * Load the data from version.php.
2515 * @param bool $disablecache do not attempt to obtain data from the cache
2516 * @return stdClass the object called $plugin defined in version.php
2518 protected function load_version_php($disablecache=false) {
2520 $cache = cache::make('core', 'plugininfo_base');
2522 $versionsphp = $cache->get('versions_php');
2524 if (!$disablecache and $versionsphp !== false and isset($versionsphp[$this->component])) {
2525 return $versionsphp[$this->component];
2528 $versionfile = $this->full_path('version.php');
2530 $plugin = new stdClass();
2531 if (is_readable($versionfile)) {
2532 include($versionfile);
2534 $versionsphp[$this->component] = $plugin;
2535 $cache->set('versions_php', $versionsphp);
2541 * Sets {@link $versiondisk} property to a numerical value representing the
2542 * version of the plugin's source code.
2544 * If the value is null after calling this method, either the plugin
2545 * does not use versioning (typically does not have any database
2546 * data) or is missing from disk.
2548 public function load_disk_version() {
2549 $plugin = $this->load_version_php();
2550 if (isset($plugin->version)) {
2551 $this->versiondisk = $plugin->version;
2556 * Sets {@link $versionrequires} property to a numerical value representing
2557 * the version of Moodle core that this plugin requires.
2559 public function load_required_main_version() {
2560 $plugin = $this->load_version_php();
2561 if (isset($plugin->requires)) {
2562 $this->versionrequires = $plugin->requires;
2567 * Initialise {@link $dependencies} to the list of other plugins (in any)
2568 * that this one requires to be installed.
2570 protected function load_other_required_plugins() {
2571 $plugin = $this->load_version_php();
2572 if (!empty($plugin->dependencies)) {
2573 $this->dependencies = $plugin->dependencies;
2575 $this->dependencies = array(); // By default, no dependencies.
2580 * Get the list of other plugins that this plugin requires to be installed.
2582 * @return array with keys the frankenstyle plugin name, and values either
2583 * a version string (like '2011101700') or the constant ANY_VERSION.
2585 public function get_other_required_plugins() {
2586 if (is_null($this->dependencies)) {
2587 $this->load_other_required_plugins();
2589 return $this->dependencies;
2593 * Is this is a subplugin?
2597 public function is_subplugin() {
2598 return ($this->get_parent_plugin() !== false);
2602 * If I am a subplugin, return the name of my parent plugin.
2604 * @return string|bool false if not a subplugin, name of the parent otherwise
2606 public function get_parent_plugin() {
2607 return $this->get_plugin_manager()->get_parent_of_subplugin($this->type);
2611 * Sets {@link $versiondb} property to a numerical value representing the
2612 * currently installed version of the plugin.
2614 * If the value is null after calling this method, either the plugin
2615 * does not use versioning (typically does not have any database
2616 * data) or has not been installed yet.
2618 public function load_db_version() {
2619 if ($ver = self::get_version_from_config_plugins($this->component)) {
2620 $this->versiondb = $ver;
2625 * Sets {@link $source} property to one of plugin_manager::PLUGIN_SOURCE_xxx
2628 * If the property's value is null after calling this method, then
2629 * the type of the plugin has not been recognized and you should throw
2632 public function init_is_standard() {
2634 $standard = plugin_manager::standard_plugins_list($this->type);
2636 if ($standard !== false) {
2637 $standard = array_flip($standard);
2638 if (isset($standard[$this->name])) {
2639 $this->source = plugin_manager::PLUGIN_SOURCE_STANDARD;
2640 } else if (!is_null($this->versiondb) and is_null($this->versiondisk)
2641 and plugin_manager::is_deleted_standard_plugin($this->type, $this->name)) {
2642 $this->source = plugin_manager::PLUGIN_SOURCE_STANDARD; // to be deleted
2644 $this->source = plugin_manager::PLUGIN_SOURCE_EXTENSION;
2650 * Returns true if the plugin is shipped with the official distribution
2651 * of the current Moodle version, false otherwise.
2655 public function is_standard() {
2656 return $this->source === plugin_manager::PLUGIN_SOURCE_STANDARD;
2660 * Returns true if the the given Moodle version is enough to run this plugin
2662 * @param string|int|double $moodleversion
2665 public function is_core_dependency_satisfied($moodleversion) {
2667 if (empty($this->versionrequires)) {
2671 return (double)$this->versionrequires <= (double)$moodleversion;
2676 * Returns the status of the plugin
2678 * @return string one of plugin_manager::PLUGIN_STATUS_xxx constants
2680 public function get_status() {
2682 if (is_null($this->versiondb) and is_null($this->versiondisk)) {
2683 return plugin_manager::PLUGIN_STATUS_NODB;
2685 } else if (is_null($this->versiondb) and !is_null($this->versiondisk)) {
2686 return plugin_manager::PLUGIN_STATUS_NEW;
2688 } else if (!is_null($this->versiondb) and is_null($this->versiondisk)) {
2689 if (plugin_manager::is_deleted_standard_plugin($this->type, $this->name)) {
2690 return plugin_manager::PLUGIN_STATUS_DELETE;
2692 return plugin_manager::PLUGIN_STATUS_MISSING;
2695 } else if ((string)$this->versiondb === (string)$this->versiondisk) {
2696 return plugin_manager::PLUGIN_STATUS_UPTODATE;
2698 } else if ($this->versiondb < $this->versiondisk) {
2699 return plugin_manager::PLUGIN_STATUS_UPGRADE;
2701 } else if ($this->versiondb > $this->versiondisk) {
2702 return plugin_manager::PLUGIN_STATUS_DOWNGRADE;
2705 // $version = pi(); and similar funny jokes - hopefully Donald E. Knuth will never contribute to Moodle ;-)
2706 throw new coding_exception('Unable to determine plugin state, check the plugin versions');
2711 * Returns the information about plugin availability
2713 * True means that the plugin is enabled. False means that the plugin is
2714 * disabled. Null means that the information is not available, or the
2715 * plugin does not support configurable availability or the availability
2716 * can not be changed.
2720 public function is_enabled() {
2725 * Populates the property {@link $availableupdates} with the information provided by
2726 * available update checker
2728 * @param available_update_checker $provider the class providing the available update info
2730 public function check_available_updates(available_update_checker $provider) {
2733 if (isset($CFG->updateminmaturity)) {
2734 $minmaturity = $CFG->updateminmaturity;
2736 // this can happen during the very first upgrade to 2.3
2737 $minmaturity = MATURITY_STABLE;
2740 $this->availableupdates = $provider->get_update_info($this->component,
2741 array('minmaturity' => $minmaturity));
2745 * If there are updates for this plugin available, returns them.
2747 * Returns array of {@link available_update_info} objects, if some update
2748 * is available. Returns null if there is no update available or if the update
2749 * availability is unknown.
2751 * @return array|null
2753 public function available_updates() {
2755 if (empty($this->availableupdates) or !is_array($this->availableupdates)) {
2761 foreach ($this->availableupdates as $availableupdate) {
2762 if ($availableupdate->version > $this->versiondisk) {
2763 $updates[] = $availableupdate;
2767 if (empty($updates)) {
2775 * Returns the node name used in admin settings menu for this plugin settings (if applicable)
2777 * @return null|string node name or null if plugin does not create settings node (default)
2779 public function get_settings_section_name() {
2784 * Returns the URL of the plugin settings screen
2786 * Null value means that the plugin either does not have the settings screen
2787 * or its location is not available via this library.
2789 * @return null|moodle_url
2791 public function get_settings_url() {
2792 $section = $this->get_settings_section_name();
2793 if ($section === null) {
2796 $settings = admin_get_root()->locate($section);
2797 if ($settings && $settings instanceof admin_settingpage) {
2798 return new moodle_url('/admin/settings.php', array('section' => $section));
2799 } else if ($settings && $settings instanceof admin_externalpage) {
2800 return new moodle_url($settings->url);
2807 * Loads plugin settings to the settings tree
2809 * This function usually includes settings.php file in plugins folder.
2810 * Alternatively it can create a link to some settings page (instance of admin_externalpage)
2812 * @param part_of_admin_tree $adminroot
2813 * @param string $parentnodename
2814 * @param bool $hassiteconfig whether the current user has moodle/site:config capability
2816 public function load_settings(part_of_admin_tree $adminroot, $parentnodename, $hassiteconfig) {
2820 * Should there be a way to uninstall the plugin via the administration UI
2822 * By default, uninstallation is allowed for all non-standard add-ons. Subclasses
2823 * may want to override this to allow uninstallation of all plugins (simply by
2824 * returning true unconditionally). Subplugins follow their parent plugin's
2825 * decision by default.
2827 * Note that even if true is returned, the core may still prohibit the uninstallation,
2828 * e.g. in case there are other plugins that depend on this one.
2832 public function is_uninstall_allowed() {
2834 if ($this->is_subplugin()) {
2835 return $this->get_plugin_manager()->get_plugin_info($this->get_parent_plugin())->is_uninstall_allowed();
2838 if ($this->is_standard()) {
2846 * Optional extra warning before uninstallation, for example number of uses in courses.
2850 public function get_uninstall_extra_warning() {
2855 * Returns the URL of the screen where this plugin can be uninstalled
2857 * Visiting that URL must be safe, that is a manual confirmation is needed
2858 * for actual uninstallation of the plugin. By default, URL to a common
2859 * uninstalling tool is returned.
2861 * @return moodle_url
2863 public function get_uninstall_url() {
2864 return $this->get_default_uninstall_url();
2868 * Returns relative directory of the plugin with heading '/'
2872 public function get_dir() {
2875 return substr($this->rootdir, strlen($CFG->dirroot));
2879 * Hook method to implement certain steps when uninstalling the plugin.
2881 * This hook is called by {@link plugin_manager::uninstall_plugin()} so
2882 * it is basically usable only for those plugin types that use the default
2883 * uninstall tool provided by {@link self::get_default_uninstall_url()}.
2885 * @param progress_trace $progress traces the process
2886 * @return bool true on success, false on failure
2888 public function uninstall(progress_trace $progress) {
2893 * Returns URL to a script that handles common plugin uninstall procedure.
2895 * This URL is suitable for plugins that do not have their own UI
2898 * @return moodle_url
2900 protected final function get_default_uninstall_url() {
2901 return new moodle_url('/admin/plugins.php', array(
2902 'sesskey' => sesskey(),
2903 'uninstall' => $this->component,
2909 * Provides access to plugin versions from the {config_plugins} table
2911 * @param string $plugin plugin name
2912 * @param bool $disablecache do not attempt to obtain data from the cache
2913 * @return int|bool the stored value or false if not found
2915 protected function get_version_from_config_plugins($plugin, $disablecache=false) {
2918 $cache = cache::make('core', 'plugininfo_base');
2920 $pluginversions = $cache->get('versions_db');
2922 if ($pluginversions === false or $disablecache) {
2924 $pluginversions = $DB->get_records_menu('config_plugins', array('name' => 'version'), 'plugin', 'plugin,value');
2925 } catch (dml_exception $e) {
2927 $pluginversions = array();
2929 $cache->set('versions_db', $pluginversions);
2932 if (isset($pluginversions[$plugin])) {
2933 return $pluginversions[$plugin];
2940 * Provides access to the plugin_manager singleton.
2942 * @return plugin_manmager
2944 protected function get_plugin_manager() {
2945 return plugin_manager::instance();
2951 * General class for all plugin types that do not have their own class
2953 class plugininfo_general extends plugininfo_base {
2958 * Class for page side blocks
2960 class plugininfo_block extends plugininfo_base {
2962 public static function get_plugins($type, $typerootdir, $typeclass) {
2964 // get the information about blocks at the disk
2965 $blocks = parent::get_plugins($type, $typerootdir, $typeclass);
2967 // add blocks missing from disk
2968 $blocksinfo = self::get_blocks_info();
2969 foreach ($blocksinfo as $blockname => $blockinfo) {
2970 if (isset($blocks[$blockname])) {
2973 $plugin = new $typeclass();
2974 $plugin->type = $type;
2975 $plugin->typerootdir = $typerootdir;
2976 $plugin->name = $blockname;
2977 $plugin->rootdir = null;
2978 $plugin->displayname = $blockname;
2979 $plugin->versiondb = $blockinfo->version;
2980 $plugin->init_is_standard();
2982 $blocks[$blockname] = $plugin;
2989 * Magic method getter, redirects to read only values.
2991 * For block plugins pretends the object has 'visible' property for compatibility
2992 * with plugins developed for Moodle version below 2.4
2994 * @param string $name
2997 public function __get($name) {
2998 if ($name === 'visible') {
2999 debugging('This is now an instance of plugininfo_block, please use $block->is_enabled() instead of $block->visible', DEBUG_DEVELOPER);
3000 return ($this->is_enabled() !== false);
3002 return parent::__get($name);
3005 public function init_display_name() {
3007 if (get_string_manager()->string_exists('pluginname', 'block_' . $this->name)) {
3008 $this->displayname = get_string('pluginname', 'block_' . $this->name);
3010 } else if (($block = block_instance($this->name)) !== false) {
3011 $this->displayname = $block->get_title();
3014 parent::init_display_name();
3018 public function load_db_version() {
3021 $blocksinfo = self::get_blocks_info();
3022 if (isset($blocksinfo[$this->name]->version)) {
3023 $this->versiondb = $blocksinfo[$this->name]->version;
3027 public function is_enabled() {
3029 $blocksinfo = self::get_blocks_info();
3030 if (isset($blocksinfo[$this->name]->visible)) {
3031 if ($blocksinfo[$this->name]->visible) {
3037 return parent::is_enabled();
3041 public function get_settings_section_name() {
3042 return 'blocksetting' . $this->name;
3045 public function load_settings(part_of_admin_tree $adminroot, $parentnodename, $hassiteconfig) {
3046 global $CFG, $USER, $DB, $OUTPUT, $PAGE; // in case settings.php wants to refer to them
3047 $ADMIN = $adminroot; // may be used in settings.php
3048 $block = $this; // also can be used inside settings.php
3049 $section = $this->get_settings_section_name();
3051 if (!$hassiteconfig || (($blockinstance = block_instance($this->name)) === false)) {
3056 if ($blockinstance->has_config()) {
3057 if (file_exists($this->full_path('settings.php'))) {
3058 $settings = new admin_settingpage($section, $this->displayname,
3059 'moodle/site:config', $this->is_enabled() === false);
3060 include($this->full_path('settings.php')); // this may also set $settings to null
3062 $blocksinfo = self::get_blocks_info();
3063 $settingsurl = new moodle_url('/admin/block.php', array('block' => $blocksinfo[$this->name]->id));
3064 $settings = new admin_externalpage($section, $this->displayname,
3065 $settingsurl, 'moodle/site:config', $this->is_enabled() === false);
3069 $ADMIN->add($parentnodename, $settings);
3073 public function is_uninstall_allowed() {
3078 * Warnign with number of block instances.
3082 public function get_uninstall_extra_warning() {
3085 if (!$count = $DB->count_records('block_instances', array('blockname'=>$this->name))) {
3089 return '<p>'.get_string('uninstallextraconfirmblock', 'core_plugin', array('instances'=>$count)).'</p>';
3093 * Provides access to the records in {block} table
3095 * @param bool $disablecache do not attempt to obtain data from the cache
3096 * @return array array of stdClasses
3098 protected static function get_blocks_info($disablecache=false) {
3101 $cache = cache::make('core', 'plugininfo_block');
3103 $blocktypes = $cache->get('blocktypes');
3105 if ($blocktypes === false or $disablecache) {
3107 $blocktypes = $DB->get_records('block', null, 'name', 'name,id,version,visible');
3108 } catch (dml_exception $e) {
3110 $blocktypes = array();
3112 $cache->set('blocktypes', $blocktypes);
3121 * Class for text filters
3123 class plugininfo_filter extends plugininfo_base {
3125 public static function get_plugins($type, $typerootdir, $typeclass) {
3130 // get the list of filters in /filter location
3131 $installed = filter_get_all_installed();
3133 foreach ($installed as $name => $displayname) {
3134 $plugin = new $typeclass();
3135 $plugin->type = $type;
3136 $plugin->typerootdir = $typerootdir;
3137 $plugin->name = $name;
3138 $plugin->rootdir = "$CFG->dirroot/filter/$name";
3139 $plugin->displayname = $displayname;
3141 $plugin->load_disk_version();
3142 $plugin->load_db_version();
3143 $plugin->load_required_main_version();
3144 $plugin->init_is_standard();
3146 $filters[$plugin->name] = $plugin;
3149 // Do not mess with filter registration here!
3151 $globalstates = self::get_global_states();
3153 // make sure that all registered filters are installed, just in case
3154 foreach ($globalstates as $name => $info) {
3155 if (!isset($filters[$name])) {
3156 // oops, there is a record in filter_active but the filter is not installed
3157 $plugin = new $typeclass();
3158 $plugin->type = $type;
3159 $plugin->typerootdir = $typerootdir;
3160 $plugin->name = $name;
3161 $plugin->rootdir = "$CFG->dirroot/filter/$name";
3162 $plugin->displayname = $name;
3164 $plugin->load_db_version();
3166 if (is_null($plugin->versiondb)) {
3167 // this is a hack to stimulate 'Missing from disk' error
3168 // because $plugin->versiondisk will be null !== false
3169 $plugin->versiondb = false;
3172 $filters[$plugin->name] = $plugin;
3179 public function init_display_name() {
3180 // do nothing, the name is set in self::get_plugins()
3183 public function is_enabled() {
3185 $globalstates = self::get_global_states();
3187 foreach ($globalstates as $name => $info) {
3188 if ($name === $this->name) {
3189 if ($info->active == TEXTFILTER_DISABLED) {
3192 // it may be 'On' or 'Off, but available'
3201 public function get_settings_section_name() {
3202 return 'filtersetting' . $this->name;
3205 public function load_settings(part_of_admin_tree $adminroot, $parentnodename, $hassiteconfig) {
3206 global $CFG, $USER, $DB, $OUTPUT, $PAGE; // in case settings.php wants to refer to them
3207 $ADMIN = $adminroot; // may be used in settings.php
3208 $filter = $this; // also can be used inside settings.php
3211 if ($hassiteconfig && file_exists($this->full_path('filtersettings.php'))) {
3212 $section = $this->get_settings_section_name();
3213 $settings = new admin_settingpage($section, $this->displayname,
3214 'moodle/site:config', $this->is_enabled() === false);
3215 include($this->full_path('filtersettings.php')); // this may also set $settings to null
3218 $ADMIN->add($parentnodename, $settings);
3222 public function is_uninstall_allowed() {
3226 public function get_uninstall_url() {
3227 return new moodle_url('/admin/filters.php', array('sesskey' => sesskey(), 'filterpath' => $this->name, 'action' => 'delete'));
3231 * Provides access to the results of {@link filter_get_global_states()}
3232 * but indexed by the normalized filter name
3234 * The legacy filter name is available as ->legacyname property.
3236 * @param bool $disablecache do not attempt to obtain data from the cache
3239 protected static function get_global_states($disablecache=false) {
3242 $cache = cache::make('core', 'plugininfo_filter');
3244 $globalstates = $cache->get('globalstates');
3246 if ($globalstates === false or $disablecache) {
3248 if (!$DB->get_manager()->table_exists('filter_active')) {
3249 // Not installed yet.
3250 $cache->set('globalstates', array());
3254 $globalstates = array();
3256 foreach (filter_get_global_states() as $name => $info) {
3257 if (strpos($name, '/') !== false) {
3258 // Skip existing before upgrade to new names.
3262 $filterinfo = new stdClass();
3263 $filterinfo->active = $info->active;
3264 $filterinfo->sortorder = $info->sortorder;
3265 $globalstates[$name] = $filterinfo;
3268 $cache->set('globalstates', $globalstates);
3271 return $globalstates;
3277 * Class for activity modules
3279 class plugininfo_mod extends plugininfo_base {
3281 public static function get_plugins($type, $typerootdir, $typeclass) {
3283 // get the information about plugins at the disk
3284 $modules = parent::get_plugins($type, $typerootdir, $typeclass);
3286 // add modules missing from disk
3287 $modulesinfo = self::get_modules_info();
3288 foreach ($modulesinfo as $modulename => $moduleinfo) {
3289 if (isset($modules[$modulename])) {
3292 $plugin = new $typeclass();
3293 $plugin->type = $type;
3294 $plugin->typerootdir = $typerootdir;
3295 $plugin->name = $modulename;
3296 $plugin->rootdir = null;
3297 $plugin->displayname = $modulename;
3298 $plugin->versiondb = $moduleinfo->version;
3299 $plugin->init_is_standard();
3301 $modules[$modulename] = $plugin;
3308 * Magic method getter, redirects to read only values.
3310 * For module plugins we pretend the object has 'visible' property for compatibility
3311 * with plugins developed for Moodle version below 2.4
3313 * @param string $name
3316 public function __get($name) {
3317 if ($name === 'visible') {
3318 debugging('This is now an instance of plugininfo_mod, please use $module->is_enabled() instead of $module->visible', DEBUG_DEVELOPER);
3319 return ($this->is_enabled() !== false);
3321 return parent::__get($name);
3324 public function init_display_name() {
3325 if (get_string_manager()->string_exists('pluginname', $this->component)) {
3326 $this->displayname = get_string('pluginname', $this->component);
3328 $this->displayname = get_string('modulename', $this->component);
3333 * Load the data from version.php.
3335 * @param bool $disablecache do not attempt to obtain data from the cache
3336 * @return object the data object defined in version.php.
3338 protected function load_version_php($disablecache=false) {
3340 $cache = cache::make('core', 'plugininfo_base');
3342 $versionsphp = $cache->get('versions_php');
3344 if (!$disablecache and $versionsphp !== false and isset($versionsphp[$this->component])) {
3345 return $versionsphp[$this->component];
3348 $versionfile = $this->full_path('version.php');
3350 $module = new stdClass();
3351 $plugin = new stdClass();
3352 if (is_readable($versionfile)) {
3353 include($versionfile);
3355 if (!isset($module->version) and isset($plugin->version)) {
3358 $versionsphp[$this->component] = $module;
3359 $cache->set('versions_php', $versionsphp);
3364 public function load_db_version() {
3367 $modulesinfo = self::get_modules_info();
3368 if (isset($modulesinfo[$this->name]->version)) {
3369 $this->versiondb = $modulesinfo[$this->name]->version;
3373 public function is_enabled() {
3375 $modulesinfo = self::get_modules_info();
3376 if (isset($modulesinfo[$this->name]->visible)) {
3377 if ($modulesinfo[$this->name]->visible) {
3383 return parent::is_enabled();
3387 public function get_settings_section_name() {
3388 return 'modsetting' . $this->name;
3391 public function load_settings(part_of_admin_tree $adminroot, $parentnodename, $hassiteconfig) {
3392 global $CFG, $USER, $DB, $OUTPUT, $PAGE; // in case settings.php wants to refer to them
3393 $ADMIN = $adminroot; // may be used in settings.php
3394 $module = $this; // also can be used inside settings.php
3395 $section = $this->get_settings_section_name();
3397 $modulesinfo = self::get_modules_info();
3399 if ($hassiteconfig && isset($modulesinfo[$this->name]) && file_exists($this->full_path('settings.php'))) {
3400 $settings = new admin_settingpage($section, $this->displayname,
3401 'moodle/site:config', $this->is_enabled() === false);
3402 include($this->full_path('settings.php')); // this may also set $settings to null
3405 $ADMIN->add($parentnodename, $settings);
3410 * Allow all activity modules but Forum to be uninstalled.
3412 * This exception for the Forum has been hard-coded in Moodle since ages,
3413 * we may want to re-think it one day.
3415 public function is_uninstall_allowed() {
3416 if ($this->name === 'forum') {
3424 * Return warning with number of activities and number of affected courses.
3428 public function get_uninstall_extra_warning() {
3431 if (!$module = $DB->get_record('modules', array('name'=>$this->name))) {
3435 if (!$count = $DB->count_records('course_modules', array('module'=>$module->id))) {
3439 $sql = "SELECT COUNT('x')
3442 FROM {course_modules}
3446 $courses = $DB->count_records_sql($sql, array('mid'=>$module->id));
3448 return '<p>'.get_string('uninstallextraconfirmmod', 'core_plugin', array('instances'=>$count, 'courses'=>$courses)).'</p>';
3452 * Provides access to the records in {modules} table
3454 * @param bool $disablecache do not attempt to obtain data from the cache
3455 * @return array array of stdClasses
3457 protected static function get_modules_info($disablecache=false) {
3460 $cache = cache::make('core', 'plugininfo_mod');
3462 $modulesinfo = $cache->get('modulesinfo');
3464 if ($modulesinfo === false or $disablecache) {
3466 $modulesinfo = $DB->get_records('modules', null, 'name', 'name,id,version,visible');
3467 } catch (dml_exception $e) {
3469 $modulesinfo = array();
3471 $cache->set('modulesinfo', $modulesinfo);
3474 return $modulesinfo;
3480 * Class for question behaviours.
3482 class plugininfo_qbehaviour extends plugininfo_base {
3484 public function is_uninstall_allowed() {
3488 public function get_uninstall_url() {
3489 return new moodle_url('/admin/qbehaviours.php',
3490 array('delete' => $this->name, 'sesskey' => sesskey()));
3496 * Class for question types
3498 class plugininfo_qtype extends plugininfo_base {
3500 public function is_uninstall_allowed() {
3504 public function get_uninstall_url() {
3505 return new moodle_url('/admin/qtypes.php',
3506 array('delete' => $this->name, 'sesskey' => sesskey()));
3509 public function get_settings_section_name() {
3510 return 'qtypesetting' . $this->name;
3513 public function load_settings(part_of_admin_tree $adminroot, $parentnodename, $hassiteconfig) {
3514 global $CFG, $USER, $DB, $OUTPUT, $PAGE; // in case settings.php wants to refer to them
3515 $ADMIN = $adminroot; // may be used in settings.php
3516 $qtype = $this; // also can be used inside settings.php
3517 $section = $this->get_settings_section_name();
3520 $systemcontext = context_system::instance();
3521 if (($hassiteconfig || has_capability('moodle/question:config', $systemcontext)) &&
3522 file_exists($this->full_path('settings.php'))) {
3523 $settings = new admin_settingpage($section, $this->displayname,
3524 'moodle/question:config', $this->is_enabled() === false);
3525 include($this->full_path('settings.php')); // this may also set $settings to null
3528 $ADMIN->add($parentnodename, $settings);
3535 * Class for authentication plugins
3537 class plugininfo_auth extends plugininfo_base {
3539 public function is_enabled() {
3542 if (in_array($this->name, array('nologin', 'manual'))) {
3543 // these two are always enabled and can't be disabled
3547 $enabled = array_flip(explode(',', $CFG->auth));
3549 return isset($enabled[$this->name]);
3552 public function get_settings_section_name() {
3553 return 'authsetting' . $this->name;
3556 public function load_settings(part_of_admin_tree $adminroot, $parentnodename, $hassiteconfig) {
3557 global $CFG, $USER, $DB, $OUTPUT, $PAGE; // in case settings.php wants to refer to them
3558 $ADMIN = $adminroot; // may be used in settings.php
3559 $auth = $this; // also to be used inside settings.php
3560 $section = $this->get_settings_section_name();
3563 if ($hassiteconfig) {
3564 if (file_exists($this->full_path('settings.php'))) {
3565 // TODO: finish implementation of common settings - locking, etc.
3566 $settings = new admin_settingpage($section, $this->displayname,
3567 'moodle/site:config', $this->is_enabled() === false);
3568 include($this->full_path('settings.php')); // this may also set $settings to null
3570 $settingsurl = new moodle_url('/admin/auth_config.php', array('auth' => $this->name));
3571 $settings = new admin_externalpage($section, $this->displayname,
3572 $settingsurl, 'moodle/site:config', $this->is_enabled() === false);
3576 $ADMIN->add($parentnodename, $settings);
3583 * Class for enrolment plugins
3585 class plugininfo_enrol extends plugininfo_base {
3587 public function is_enabled() {
3590 // We do not actually need whole enrolment classes here so we do not call
3591 // {@link enrol_get_plugins()}. Note that this may produce slightly different
3592 // results, for example if the enrolment plugin does not contain lib.php
3593 // but it is listed in $CFG->enrol_plugins_enabled
3595 $enabled = array_flip(explode(',', $CFG->enrol_plugins_enabled));