MDL-49329 admin: Add plugin manager method for installing remote packs
[moodle.git] / lib / classes / plugin_manager.php
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1<?php
2// This file is part of Moodle - http://moodle.org/
3//
4// Moodle is free software: you can redistribute it and/or modify
5// it under the terms of the GNU General Public License as published by
6// the Free Software Foundation, either version 3 of the License, or
7// (at your option) any later version.
8//
9// Moodle is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12// GNU General Public License for more details.
13//
14// You should have received a copy of the GNU General Public License
15// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
16
17/**
18 * Defines classes used for plugins management
19 *
20 * This library provides a unified interface to various plugin types in
21 * Moodle. It is mainly used by the plugins management admin page and the
22 * plugins check page during the upgrade.
23 *
24 * @package core
25 * @copyright 2011 David Mudrak <david@moodle.com>
26 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
27 */
28
29defined('MOODLE_INTERNAL') || die();
30
31/**
32 * Singleton class providing general plugins management functionality.
33 */
34class core_plugin_manager {
35
36 /** the plugin is shipped with standard Moodle distribution */
37 const PLUGIN_SOURCE_STANDARD = 'std';
38 /** the plugin is added extension */
39 const PLUGIN_SOURCE_EXTENSION = 'ext';
40
41 /** the plugin uses neither database nor capabilities, no versions */
42 const PLUGIN_STATUS_NODB = 'nodb';
43 /** the plugin is up-to-date */
44 const PLUGIN_STATUS_UPTODATE = 'uptodate';
45 /** the plugin is about to be installed */
46 const PLUGIN_STATUS_NEW = 'new';
47 /** the plugin is about to be upgraded */
48 const PLUGIN_STATUS_UPGRADE = 'upgrade';
49 /** the standard plugin is about to be deleted */
50 const PLUGIN_STATUS_DELETE = 'delete';
51 /** the version at the disk is lower than the one already installed */
52 const PLUGIN_STATUS_DOWNGRADE = 'downgrade';
53 /** the plugin is installed but missing from disk */
54 const PLUGIN_STATUS_MISSING = 'missing';
55
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56 /** the given requirement/dependency is fulfilled */
57 const REQUIREMENT_STATUS_OK = 'ok';
58 /** the plugin requires higher core/other plugin version than is currently installed */
59 const REQUIREMENT_STATUS_OUTDATED = 'outdated';
60 /** the required dependency is not installed */
61 const REQUIREMENT_STATUS_MISSING = 'missing';
62
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63 /** the required dependency is available in the plugins directory */
64 const REQUIREMENT_AVAILABLE = 'available';
65 /** the required dependency is available in the plugins directory */
66 const REQUIREMENT_UNAVAILABLE = 'unavailable';
67
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68 /** @var core_plugin_manager holds the singleton instance */
69 protected static $singletoninstance;
70 /** @var array of raw plugins information */
71 protected $pluginsinfo = null;
72 /** @var array of raw subplugins information */
73 protected $subpluginsinfo = null;
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74 /** @var array cache information about availability in the plugins directory if requesting "at least" version */
75 protected $remotepluginsinfoatleast = null;
76 /** @var array cache information about availability in the plugins directory if requesting exact version */
77 protected $remotepluginsinfoexact = null;
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78 /** @var array list of installed plugins $name=>$version */
79 protected $installedplugins = null;
80 /** @var array list of all enabled plugins $name=>$name */
81 protected $enabledplugins = null;
82 /** @var array list of all enabled plugins $name=>$diskversion */
83 protected $presentplugins = null;
84 /** @var array reordered list of plugin types */
85 protected $plugintypes = null;
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86 /** @var \core\update\code_manager code manager to use for plugins code operations */
87 protected $codemanager = null;
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88 /** @var \core\update\api client instance to use for accessing download.moodle.org/api/ */
89 protected $updateapiclient = null;
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90
91 /**
92 * Direct initiation not allowed, use the factory method {@link self::instance()}
93 */
94 protected function __construct() {
95 }
96
97 /**
98 * Sorry, this is singleton
99 */
100 protected function __clone() {
101 }
102
103 /**
104 * Factory method for this class
105 *
106 * @return core_plugin_manager the singleton instance
107 */
108 public static function instance() {
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109 if (is_null(static::$singletoninstance)) {
110 static::$singletoninstance = new static();
e87214bd 111 }
361feecd 112 return static::$singletoninstance;
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113 }
114
115 /**
116 * Reset all caches.
117 * @param bool $phpunitreset
118 */
119 public static function reset_caches($phpunitreset = false) {
120 if ($phpunitreset) {
361feecd 121 static::$singletoninstance = null;
e87214bd 122 } else {
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123 if (static::$singletoninstance) {
124 static::$singletoninstance->pluginsinfo = null;
125 static::$singletoninstance->subpluginsinfo = null;
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126 static::$singletoninstance->remotepluginsinfoatleast = null;
127 static::$singletoninstance->remotepluginsinfoexact = null;
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128 static::$singletoninstance->installedplugins = null;
129 static::$singletoninstance->enabledplugins = null;
130 static::$singletoninstance->presentplugins = null;
131 static::$singletoninstance->plugintypes = null;
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132 static::$singletoninstance->codemanager = null;
133 static::$singletoninstance->updateapiclient = null;
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134 }
135 }
136 $cache = cache::make('core', 'plugin_manager');
137 $cache->purge();
138 }
139
140 /**
141 * Returns the result of {@link core_component::get_plugin_types()} ordered for humans
142 *
143 * @see self::reorder_plugin_types()
144 * @return array (string)name => (string)location
145 */
146 public function get_plugin_types() {
147 if (func_num_args() > 0) {
148 if (!func_get_arg(0)) {
149 throw coding_exception('core_plugin_manager->get_plugin_types() does not support relative paths.');
150 }
151 }
152 if ($this->plugintypes) {
153 return $this->plugintypes;
154 }
155
156 $this->plugintypes = $this->reorder_plugin_types(core_component::get_plugin_types());
157 return $this->plugintypes;
158 }
159
160 /**
161 * Load list of installed plugins,
162 * always call before using $this->installedplugins.
163 *
164 * This method is caching results for all plugins.
165 */
166 protected function load_installed_plugins() {
167 global $DB, $CFG;
168
169 if ($this->installedplugins) {
170 return;
171 }
172
173 if (empty($CFG->version)) {
174 // Nothing installed yet.
175 $this->installedplugins = array();
176 return;
177 }
178
179 $cache = cache::make('core', 'plugin_manager');
180 $installed = $cache->get('installed');
181
182 if (is_array($installed)) {
183 $this->installedplugins = $installed;
184 return;
185 }
186
187 $this->installedplugins = array();
188
994e5662 189 // TODO: Delete this block once Moodle 2.6 or later becomes minimum required version to upgrade.
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190 if ($CFG->version < 2013092001.02) {
191 // We did not upgrade the database yet.
192 $modules = $DB->get_records('modules', array(), 'name ASC', 'id, name, version');
193 foreach ($modules as $module) {
194 $this->installedplugins['mod'][$module->name] = $module->version;
195 }
196 $blocks = $DB->get_records('block', array(), 'name ASC', 'id, name, version');
197 foreach ($blocks as $block) {
198 $this->installedplugins['block'][$block->name] = $block->version;
199 }
200 }
201
202 $versions = $DB->get_records('config_plugins', array('name'=>'version'));
203 foreach ($versions as $version) {
204 $parts = explode('_', $version->plugin, 2);
205 if (!isset($parts[1])) {
206 // Invalid component, there must be at least one "_".
207 continue;
208 }
209 // Do not verify here if plugin type and name are valid.
210 $this->installedplugins[$parts[0]][$parts[1]] = $version->value;
211 }
212
213 foreach ($this->installedplugins as $key => $value) {
214 ksort($this->installedplugins[$key]);
215 }
216
217 $cache->set('installed', $this->installedplugins);
218 }
219
220 /**
221 * Return list of installed plugins of given type.
222 * @param string $type
223 * @return array $name=>$version
224 */
225 public function get_installed_plugins($type) {
226 $this->load_installed_plugins();
227 if (isset($this->installedplugins[$type])) {
228 return $this->installedplugins[$type];
229 }
230 return array();
231 }
232
233 /**
234 * Load list of all enabled plugins,
235 * call before using $this->enabledplugins.
236 *
237 * This method is caching results from individual plugin info classes.
238 */
239 protected function load_enabled_plugins() {
240 global $CFG;
241
242 if ($this->enabledplugins) {
243 return;
244 }
245
246 if (empty($CFG->version)) {
247 $this->enabledplugins = array();
248 return;
249 }
250
251 $cache = cache::make('core', 'plugin_manager');
252 $enabled = $cache->get('enabled');
253
254 if (is_array($enabled)) {
255 $this->enabledplugins = $enabled;
256 return;
257 }
258
259 $this->enabledplugins = array();
260
261 require_once($CFG->libdir.'/adminlib.php');
262
263 $plugintypes = core_component::get_plugin_types();
264 foreach ($plugintypes as $plugintype => $fulldir) {
361feecd 265 $plugininfoclass = static::resolve_plugininfo_class($plugintype);
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266 if (class_exists($plugininfoclass)) {
267 $enabled = $plugininfoclass::get_enabled_plugins();
268 if (!is_array($enabled)) {
269 continue;
270 }
271 $this->enabledplugins[$plugintype] = $enabled;
272 }
273 }
274
275 $cache->set('enabled', $this->enabledplugins);
276 }
277
278 /**
279 * Get list of enabled plugins of given type,
280 * the result may contain missing plugins.
281 *
282 * @param string $type
283 * @return array|null list of enabled plugins of this type, null if unknown
284 */
285 public function get_enabled_plugins($type) {
286 $this->load_enabled_plugins();
287 if (isset($this->enabledplugins[$type])) {
288 return $this->enabledplugins[$type];
289 }
290 return null;
291 }
292
293 /**
294 * Load list of all present plugins - call before using $this->presentplugins.
295 */
296 protected function load_present_plugins() {
297 if ($this->presentplugins) {
298 return;
299 }
300
301 $cache = cache::make('core', 'plugin_manager');
302 $present = $cache->get('present');
303
304 if (is_array($present)) {
305 $this->presentplugins = $present;
306 return;
307 }
308
309 $this->presentplugins = array();
310
311 $plugintypes = core_component::get_plugin_types();
312 foreach ($plugintypes as $type => $typedir) {
313 $plugs = core_component::get_plugin_list($type);
314 foreach ($plugs as $plug => $fullplug) {
01889f01 315 $module = new stdClass();
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316 $plugin = new stdClass();
317 $plugin->version = null;
0b468c59 318 include($fullplug.'/version.php');
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319
320 // Check if the legacy $module syntax is still used.
17d2a336 321 if (!is_object($module) or (count((array)$module) > 0)) {
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322 debugging('Unsupported $module syntax detected in version.php of the '.$type.'_'.$plug.' plugin.');
323 $skipcache = true;
324 }
325
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326 // Check if the component is properly declared.
327 if (empty($plugin->component) or ($plugin->component !== $type.'_'.$plug)) {
328 debugging('Plugin '.$type.'_'.$plug.' does not declare valid $plugin->component in its version.php.');
329 $skipcache = true;
330 }
331
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332 $this->presentplugins[$type][$plug] = $plugin;
333 }
334 }
335
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336 if (empty($skipcache)) {
337 $cache->set('present', $this->presentplugins);
338 }
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339 }
340
341 /**
342 * Get list of present plugins of given type.
343 *
344 * @param string $type
345 * @return array|null list of presnet plugins $name=>$diskversion, null if unknown
346 */
347 public function get_present_plugins($type) {
348 $this->load_present_plugins();
349 if (isset($this->presentplugins[$type])) {
350 return $this->presentplugins[$type];
351 }
352 return null;
353 }
354
355 /**
356 * Returns a tree of known plugins and information about them
357 *
358 * @return array 2D array. The first keys are plugin type names (e.g. qtype);
359 * the second keys are the plugin local name (e.g. multichoice); and
360 * the values are the corresponding objects extending {@link \core\plugininfo\base}
361 */
362 public function get_plugins() {
363 $this->init_pluginsinfo_property();
364
365 // Make sure all types are initialised.
366 foreach ($this->pluginsinfo as $plugintype => $list) {
367 if ($list === null) {
368 $this->get_plugins_of_type($plugintype);
369 }
370 }
371
372 return $this->pluginsinfo;
373 }
374
375 /**
376 * Returns list of known plugins of the given type.
377 *
378 * This method returns the subset of the tree returned by {@link self::get_plugins()}.
379 * If the given type is not known, empty array is returned.
380 *
381 * @param string $type plugin type, e.g. 'mod' or 'workshopallocation'
382 * @return \core\plugininfo\base[] (string)plugin name (e.g. 'workshop') => corresponding subclass of {@link \core\plugininfo\base}
383 */
384 public function get_plugins_of_type($type) {
385 global $CFG;
386
387 $this->init_pluginsinfo_property();
388
389 if (!array_key_exists($type, $this->pluginsinfo)) {
390 return array();
391 }
392
393 if (is_array($this->pluginsinfo[$type])) {
394 return $this->pluginsinfo[$type];
395 }
396
397 $types = core_component::get_plugin_types();
398
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399 if (!isset($types[$type])) {
400 // Orphaned subplugins!
361feecd 401 $plugintypeclass = static::resolve_plugininfo_class($type);
2d488c8f 402 $this->pluginsinfo[$type] = $plugintypeclass::get_plugins($type, null, $plugintypeclass, $this);
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403 return $this->pluginsinfo[$type];
404 }
405
e87214bd 406 /** @var \core\plugininfo\base $plugintypeclass */
361feecd 407 $plugintypeclass = static::resolve_plugininfo_class($type);
2d488c8f 408 $plugins = $plugintypeclass::get_plugins($type, $types[$type], $plugintypeclass, $this);
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409 $this->pluginsinfo[$type] = $plugins;
410
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411 return $this->pluginsinfo[$type];
412 }
413
414 /**
415 * Init placeholder array for plugin infos.
416 */
417 protected function init_pluginsinfo_property() {
418 if (is_array($this->pluginsinfo)) {
419 return;
420 }
421 $this->pluginsinfo = array();
422
423 $plugintypes = $this->get_plugin_types();
424
425 foreach ($plugintypes as $plugintype => $plugintyperootdir) {
426 $this->pluginsinfo[$plugintype] = null;
427 }
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428
429 // Add orphaned subplugin types.
430 $this->load_installed_plugins();
431 foreach ($this->installedplugins as $plugintype => $unused) {
432 if (!isset($plugintypes[$plugintype])) {
433 $this->pluginsinfo[$plugintype] = null;
434 }
435 }
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436 }
437
438 /**
439 * Find the plugin info class for given type.
440 *
441 * @param string $type
442 * @return string name of pluginfo class for give plugin type
443 */
444 public static function resolve_plugininfo_class($type) {
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445 $plugintypes = core_component::get_plugin_types();
446 if (!isset($plugintypes[$type])) {
447 return '\core\plugininfo\orphaned';
448 }
449
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450 $parent = core_component::get_subtype_parent($type);
451
452 if ($parent) {
453 $class = '\\'.$parent.'\plugininfo\\' . $type;
454 if (class_exists($class)) {
455 $plugintypeclass = $class;
456 } else {
457 if ($dir = core_component::get_component_directory($parent)) {
458 // BC only - use namespace instead!
459 if (file_exists("$dir/adminlib.php")) {
460 global $CFG;
461 include_once("$dir/adminlib.php");
462 }
463 if (class_exists('plugininfo_' . $type)) {
464 $plugintypeclass = 'plugininfo_' . $type;
465 debugging('Class "'.$plugintypeclass.'" is deprecated, migrate to "'.$class.'"', DEBUG_DEVELOPER);
466 } else {
467 debugging('Subplugin type "'.$type.'" should define class "'.$class.'"', DEBUG_DEVELOPER);
468 $plugintypeclass = '\core\plugininfo\general';
469 }
470 } else {
471 $plugintypeclass = '\core\plugininfo\general';
472 }
473 }
474 } else {
475 $class = '\core\plugininfo\\' . $type;
476 if (class_exists($class)) {
477 $plugintypeclass = $class;
478 } else {
479 debugging('All standard types including "'.$type.'" should have plugininfo class!', DEBUG_DEVELOPER);
480 $plugintypeclass = '\core\plugininfo\general';
481 }
482 }
483
484 if (!in_array('core\plugininfo\base', class_parents($plugintypeclass))) {
485 throw new coding_exception('Class ' . $plugintypeclass . ' must extend \core\plugininfo\base');
486 }
487
488 return $plugintypeclass;
489 }
490
491 /**
492 * Returns list of all known subplugins of the given plugin.
493 *
494 * For plugins that do not provide subplugins (i.e. there is no support for it),
495 * empty array is returned.
496 *
497 * @param string $component full component name, e.g. 'mod_workshop'
498 * @return array (string) component name (e.g. 'workshopallocation_random') => subclass of {@link \core\plugininfo\base}
499 */
500 public function get_subplugins_of_plugin($component) {
501
502 $pluginfo = $this->get_plugin_info($component);
503
504 if (is_null($pluginfo)) {
505 return array();
506 }
507
508 $subplugins = $this->get_subplugins();
509
510 if (!isset($subplugins[$pluginfo->component])) {
511 return array();
512 }
513
514 $list = array();
515
516 foreach ($subplugins[$pluginfo->component] as $subdata) {
517 foreach ($this->get_plugins_of_type($subdata->type) as $subpluginfo) {
518 $list[$subpluginfo->component] = $subpluginfo;
519 }
520 }
521
522 return $list;
523 }
524
525 /**
526 * Returns list of plugins that define their subplugins and the information
527 * about them from the db/subplugins.php file.
528 *
529 * @return array with keys like 'mod_quiz', and values the data from the
530 * corresponding db/subplugins.php file.
531 */
532 public function get_subplugins() {
533
534 if (is_array($this->subpluginsinfo)) {
535 return $this->subpluginsinfo;
536 }
537
538 $plugintypes = core_component::get_plugin_types();
539
540 $this->subpluginsinfo = array();
541 foreach (core_component::get_plugin_types_with_subplugins() as $type => $ignored) {
542 foreach (core_component::get_plugin_list($type) as $plugin => $componentdir) {
543 $component = $type.'_'.$plugin;
544 $subplugins = core_component::get_subplugins($component);
545 if (!$subplugins) {
546 continue;
547 }
548 $this->subpluginsinfo[$component] = array();
549 foreach ($subplugins as $subplugintype => $ignored) {
550 $subplugin = new stdClass();
551 $subplugin->type = $subplugintype;
552 $subplugin->typerootdir = $plugintypes[$subplugintype];
553 $this->subpluginsinfo[$component][$subplugintype] = $subplugin;
554 }
555 }
556 }
557 return $this->subpluginsinfo;
558 }
559
560 /**
561 * Returns the name of the plugin that defines the given subplugin type
562 *
563 * If the given subplugin type is not actually a subplugin, returns false.
564 *
565 * @param string $subplugintype the name of subplugin type, eg. workshopform or quiz
566 * @return false|string the name of the parent plugin, eg. mod_workshop
567 */
568 public function get_parent_of_subplugin($subplugintype) {
569 $parent = core_component::get_subtype_parent($subplugintype);
570 if (!$parent) {
571 return false;
572 }
573 return $parent;
574 }
575
576 /**
577 * Returns a localized name of a given plugin
578 *
579 * @param string $component name of the plugin, eg mod_workshop or auth_ldap
580 * @return string
581 */
582 public function plugin_name($component) {
583
584 $pluginfo = $this->get_plugin_info($component);
585
586 if (is_null($pluginfo)) {
587 throw new moodle_exception('err_unknown_plugin', 'core_plugin', '', array('plugin' => $component));
588 }
589
590 return $pluginfo->displayname;
591 }
592
593 /**
594 * Returns a localized name of a plugin typed in singular form
595 *
596 * Most plugin types define their names in core_plugin lang file. In case of subplugins,
597 * we try to ask the parent plugin for the name. In the worst case, we will return
598 * the value of the passed $type parameter.
599 *
600 * @param string $type the type of the plugin, e.g. mod or workshopform
601 * @return string
602 */
603 public function plugintype_name($type) {
604
605 if (get_string_manager()->string_exists('type_' . $type, 'core_plugin')) {
606 // For most plugin types, their names are defined in core_plugin lang file.
607 return get_string('type_' . $type, 'core_plugin');
608
609 } else if ($parent = $this->get_parent_of_subplugin($type)) {
610 // If this is a subplugin, try to ask the parent plugin for the name.
611 if (get_string_manager()->string_exists('subplugintype_' . $type, $parent)) {
612 return $this->plugin_name($parent) . ' / ' . get_string('subplugintype_' . $type, $parent);
613 } else {
614 return $this->plugin_name($parent) . ' / ' . $type;
615 }
616
617 } else {
618 return $type;
619 }
620 }
621
622 /**
623 * Returns a localized name of a plugin type in plural form
624 *
625 * Most plugin types define their names in core_plugin lang file. In case of subplugins,
626 * we try to ask the parent plugin for the name. In the worst case, we will return
627 * the value of the passed $type parameter.
628 *
629 * @param string $type the type of the plugin, e.g. mod or workshopform
630 * @return string
631 */
632 public function plugintype_name_plural($type) {
633
634 if (get_string_manager()->string_exists('type_' . $type . '_plural', 'core_plugin')) {
635 // For most plugin types, their names are defined in core_plugin lang file.
636 return get_string('type_' . $type . '_plural', 'core_plugin');
637
638 } else if ($parent = $this->get_parent_of_subplugin($type)) {
639 // If this is a subplugin, try to ask the parent plugin for the name.
640 if (get_string_manager()->string_exists('subplugintype_' . $type . '_plural', $parent)) {
641 return $this->plugin_name($parent) . ' / ' . get_string('subplugintype_' . $type . '_plural', $parent);
642 } else {
643 return $this->plugin_name($parent) . ' / ' . $type;
644 }
645
646 } else {
647 return $type;
648 }
649 }
650
651 /**
652 * Returns information about the known plugin, or null
653 *
654 * @param string $component frankenstyle component name.
655 * @return \core\plugininfo\base|null the corresponding plugin information.
656 */
657 public function get_plugin_info($component) {
658 list($type, $name) = core_component::normalize_component($component);
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659 $plugins = $this->get_plugins_of_type($type);
660 if (isset($plugins[$name])) {
661 return $plugins[$name];
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662 } else {
663 return null;
664 }
665 }
666
667 /**
668 * Check to see if the current version of the plugin seems to be a checkout of an external repository.
669 *
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670 * @param string $component frankenstyle component name
671 * @return false|string
672 */
673 public function plugin_external_source($component) {
674
675 $plugininfo = $this->get_plugin_info($component);
676
677 if (is_null($plugininfo)) {
678 return false;
679 }
680
681 $pluginroot = $plugininfo->rootdir;
682
683 if (is_dir($pluginroot.'/.git')) {
684 return 'git';
685 }
686
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687 if (is_file($pluginroot.'/.git')) {
688 return 'git-submodule';
689 }
690
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691 if (is_dir($pluginroot.'/CVS')) {
692 return 'cvs';
693 }
694
695 if (is_dir($pluginroot.'/.svn')) {
696 return 'svn';
697 }
698
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699 if (is_dir($pluginroot.'/.hg')) {
700 return 'mercurial';
701 }
702
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703 return false;
704 }
705
706 /**
707 * Get a list of any other plugins that require this one.
708 * @param string $component frankenstyle component name.
709 * @return array of frankensyle component names that require this one.
710 */
711 public function other_plugins_that_require($component) {
712 $others = array();
713 foreach ($this->get_plugins() as $type => $plugins) {
714 foreach ($plugins as $plugin) {
715 $required = $plugin->get_other_required_plugins();
716 if (isset($required[$component])) {
717 $others[] = $plugin->component;
718 }
719 }
720 }
721 return $others;
722 }
723
724 /**
725 * Check a dependencies list against the list of installed plugins.
726 * @param array $dependencies compenent name to required version or ANY_VERSION.
727 * @return bool true if all the dependencies are satisfied.
728 */
729 public function are_dependencies_satisfied($dependencies) {
730 foreach ($dependencies as $component => $requiredversion) {
731 $otherplugin = $this->get_plugin_info($component);
732 if (is_null($otherplugin)) {
733 return false;
734 }
735
736 if ($requiredversion != ANY_VERSION and $otherplugin->versiondisk < $requiredversion) {
737 return false;
738 }
739 }
740
741 return true;
742 }
743
744 /**
745 * Checks all dependencies for all installed plugins
746 *
747 * This is used by install and upgrade. The array passed by reference as the second
748 * argument is populated with the list of plugins that have failed dependencies (note that
749 * a single plugin can appear multiple times in the $failedplugins).
750 *
751 * @param int $moodleversion the version from version.php.
752 * @param array $failedplugins to return the list of plugins with non-satisfied dependencies
753 * @return bool true if all the dependencies are satisfied for all plugins.
754 */
755 public function all_plugins_ok($moodleversion, &$failedplugins = array()) {
756
757 $return = true;
758 foreach ($this->get_plugins() as $type => $plugins) {
759 foreach ($plugins as $plugin) {
760
761 if (!$plugin->is_core_dependency_satisfied($moodleversion)) {
762 $return = false;
763 $failedplugins[] = $plugin->component;
764 }
765
766 if (!$this->are_dependencies_satisfied($plugin->get_other_required_plugins())) {
767 $return = false;
768 $failedplugins[] = $plugin->component;
769 }
770 }
771 }
772
773 return $return;
774 }
775
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776 /**
777 * Resolve requirements and dependencies of a plugin.
778 *
779 * Returns an array of objects describing the requirement/dependency,
780 * indexed by the frankenstyle name of the component. The returned array
781 * can be empty. The objects in the array have following properties:
782 *
783 * ->(numeric)hasver
784 * ->(numeric)reqver
785 * ->(string)status
5a92cd0b 786 * ->(string)availability
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787 *
788 * @param \core\plugininfo\base $plugin the plugin we are checking
789 * @param null|string|int|double $moodleversion explicit moodle core version to check against, defaults to $CFG->version
790 * @param null|string|int $moodlebranch explicit moodle core branch to check against, defaults to $CFG->branch
791 * @return array of objects
792 */
793 public function resolve_requirements(\core\plugininfo\base $plugin, $moodleversion=null, $moodlebranch=null) {
794 global $CFG;
795
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796 if ($plugin->versiondisk === null) {
797 // Missing from disk, we have no version.php to read from.
798 return array();
799 }
800
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801 if ($moodleversion === null) {
802 $moodleversion = $CFG->version;
803 }
804
805 if ($moodlebranch === null) {
806 $moodlebranch = $CFG->branch;
807 }
808
809 $reqs = array();
810 $reqcore = $this->resolve_core_requirements($plugin, $moodleversion);
811
812 if (!empty($reqcore)) {
813 $reqs['core'] = $reqcore;
814 }
815
816 foreach ($plugin->get_other_required_plugins() as $reqplug => $reqver) {
817 $reqs[$reqplug] = $this->resolve_dependency_requirements($plugin, $reqplug, $reqver, $moodlebranch);
818 }
819
820 return $reqs;
821 }
822
823 /**
824 * Helper method to resolve plugin's requirements on the moodle core.
825 *
826 * @param \core\plugininfo\base $plugin the plugin we are checking
827 * @param string|int|double $moodleversion moodle core branch to check against
828 * @return stdObject
829 */
830 protected function resolve_core_requirements(\core\plugininfo\base $plugin, $moodleversion) {
831
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832 $reqs = (object)array(
833 'hasver' => null,
834 'reqver' => null,
835 'status' => null,
836 'availability' => null,
837 );
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838
839 $reqs->hasver = $moodleversion;
840
841 if (empty($plugin->versionrequires)) {
842 $reqs->reqver = ANY_VERSION;
843 } else {
844 $reqs->reqver = $plugin->versionrequires;
845 }
846
847 if ($plugin->is_core_dependency_satisfied($moodleversion)) {
848 $reqs->status = self::REQUIREMENT_STATUS_OK;
849 } else {
850 $reqs->status = self::REQUIREMENT_STATUS_OUTDATED;
851 }
852
853 return $reqs;
854 }
855
856 /**
857 * Helper method to resolve plugin's dependecies on other plugins.
858 *
859 * @param \core\plugininfo\base $plugin the plugin we are checking
860 * @param string $otherpluginname
861 * @param string|int $requiredversion
862 * @param string|int $moodlebranch explicit moodle core branch to check against, defaults to $CFG->branch
863 * @return stdClass
864 */
865 protected function resolve_dependency_requirements(\core\plugininfo\base $plugin, $otherpluginname,
866 $requiredversion, $moodlebranch) {
867
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868 $reqs = (object)array(
869 'hasver' => null,
870 'reqver' => null,
871 'status' => null,
872 'availability' => null,
873 );
874
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875 $otherplugin = $this->get_plugin_info($otherpluginname);
876
877 if ($otherplugin !== null) {
878 // The required plugin is installed.
879 $reqs->hasver = $otherplugin->versiondisk;
880 $reqs->reqver = $requiredversion;
881 // Check it has sufficient version.
882 if ($requiredversion == ANY_VERSION or $otherplugin->versiondisk >= $requiredversion) {
883 $reqs->status = self::REQUIREMENT_STATUS_OK;
884 } else {
885 $reqs->status = self::REQUIREMENT_STATUS_OUTDATED;
886 }
887
888 } else {
889 // The required plugin is not installed.
890 $reqs->hasver = null;
891 $reqs->reqver = $requiredversion;
892 $reqs->status = self::REQUIREMENT_STATUS_MISSING;
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893 }
894
895 if ($reqs->status !== self::REQUIREMENT_STATUS_OK) {
35f2b674 896 if ($this->is_remote_plugin_available($otherpluginname, $requiredversion, false)) {
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897 $reqs->availability = self::REQUIREMENT_AVAILABLE;
898 } else {
899 $reqs->availability = self::REQUIREMENT_UNAVAILABLE;
900 }
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901 }
902
903 return $reqs;
904 }
905
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906 /**
907 * Is the given plugin version available in the plugins directory?
908 *
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909 * See {@link self::get_remote_plugin_info()} for the full explanation of how the $version
910 * parameter is interpretted.
911 *
912 * @param string $component plugin frankenstyle name
913 * @param string|int $version ANY_VERSION or the version number
914 * @param bool $exactmatch false if "given version or higher" is requested
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915 * @return boolean
916 */
35f2b674 917 public function is_remote_plugin_available($component, $version, $exactmatch) {
5a92cd0b 918
35f2b674 919 $info = $this->get_remote_plugin_info($component, $version, $exactmatch);
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920
921 if (empty($info)) {
922 // There is no available plugin of that name.
923 return false;
924 }
925
926 if (empty($info->version)) {
927 // Plugin is known, but no suitable version was found.
928 return false;
929 }
930
931 return true;
932 }
933
9137a89a 934 /**
35f2b674 935 * Can the given plugin version be installed via the admin UI?
9137a89a 936 *
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937 * This check should be used whenever attempting to install a plugin from
938 * the plugins directory (new install, available update, missing dependency).
939 *
9137a89a 940 * @param string $component
35f2b674 941 * @param int $version version number
36977a6d 942 * $param string $reason returned code of the reason why it is not
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943 * @return boolean
944 */
36977a6d 945 public function is_remote_plugin_installable($component, $version, &$reason=null) {
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946 global $CFG;
947
948 // Make sure the feature is not disabled.
949 if (!empty($CFG->disableonclickaddoninstall)) {
36977a6d 950 $reason = 'disabled';
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951 return false;
952 }
953
36977a6d 954 // Make sure the version is available.
35f2b674 955 if (!$this->is_remote_plugin_available($component, $version, true)) {
36977a6d 956 $reason = 'remoteunavailable';
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957 return false;
958 }
959
960 // Make sure the plugin type root directory is writable.
961 list($plugintype, $pluginname) = core_component::normalize_component($component);
962 if (!$this->is_plugintype_writable($plugintype)) {
36977a6d 963 $reason = 'notwritableplugintype';
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964 return false;
965 }
966
35f2b674 967 $remoteinfo = $this->get_remote_plugin_info($component, $version, true);
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968 $localinfo = $this->get_plugin_info($component);
969
970 if ($localinfo) {
971 // If the plugin is already present, prevent downgrade.
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972 if ($localinfo->versiondb > $remoteinfo->version->version) {
973 $reason = 'cannotdowngrade';
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974 return false;
975 }
976
977 // Make sure we have write access to all the existing code.
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978 if (is_dir($localinfo->rootdir)) {
979 if (!$this->is_plugin_folder_removable($component)) {
980 $reason = 'notwritableplugin';
981 return false;
982 }
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983 }
984 }
985
986 // Looks like it could work.
987 return true;
988 }
989
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990 /**
991 * Given the list of remote plugin infos, return just those installable.
992 *
993 * This is typically used on lists returned by
994 * {@link self::available_updates()} or {@link self::missing_dependencies()}
995 * to perform bulk installation of remote plugins.
996 *
997 * @param array $remoteinfos list of {@link \core\update\remote_info}
998 * @return array
999 */
1000 public function filter_installable($remoteinfos) {
1001
1002 if (empty($remoteinfos)) {
1003 return array();
1004 }
1005 $installable = array();
1006 foreach ($remoteinfos as $index => $remoteinfo) {
1007 if ($this->is_remote_plugin_installable($remoteinfo->component, $remoteinfo->version->version)) {
1008 $installable[$index] = $remoteinfo;
1009 }
1010 }
1011 return $installable;
1012 }
1013
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1014 /**
1015 * Returns information about a plugin in the plugins directory.
1016 *
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1017 * This is typically used when checking for available dependencies (in
1018 * which case the $version represents minimal version we need), or
1019 * when installing an available update or a new plugin from the plugins
1020 * directory (in which case the $version is exact version we are
1021 * interested in). The interpretation of the $version is controlled
1022 * by the $exactmatch argument.
5a92cd0b 1023 *
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1024 * If a plugin with the given component name is found, data about the
1025 * plugin are returned as an object. The ->version property of the object
1026 * contains the information about the particular plugin version that
1027 * matches best the given critera. The ->version property is false if no
1028 * suitable version of the plugin was found (yet the plugin itself is
1029 * known).
1030 *
1031 * See {@link \core\update\api::validate_pluginfo_format()} for the
1032 * returned data structure.
1033 *
1034 * @param string $component plugin frankenstyle name
1035 * @param string|int $version ANY_VERSION or the version number
1036 * @param bool $exactmatch false if "given version or higher" is requested
4f18a4e6 1037 * @return \core\update\remote_info|bool
5a92cd0b 1038 */
35f2b674 1039 public function get_remote_plugin_info($component, $version, $exactmatch) {
5a92cd0b 1040
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1041 if ($exactmatch and $version == ANY_VERSION) {
1042 throw new coding_exception('Invalid request for exactly any version, it does not make sense.');
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1043 }
1044
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1045 $client = $this->get_update_api_client();
1046
1047 if ($exactmatch) {
1048 // Use client's get_plugin_info() method.
1049 if (!isset($this->remotepluginsinfoexact[$component][$version])) {
1050 $this->remotepluginsinfoexact[$component][$version] = $client->get_plugin_info($component, $version);
1051 }
1052 return $this->remotepluginsinfoexact[$component][$version];
1053
1054 } else {
1055 // Use client's find_plugin() method.
1056 if (!isset($this->remotepluginsinfoatleast[$component][$version])) {
1057 $this->remotepluginsinfoatleast[$component][$version] = $client->find_plugin($component, $version);
1058 }
1059 return $this->remotepluginsinfoatleast[$component][$version];
1060 }
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1061 }
1062
1063 /**
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1064 * Obtain the plugin ZIP file from the given URL
1065 *
1066 * The caller is supposed to know both downloads URL and the MD5 hash of
1067 * the ZIP contents in advance, typically by using the API requests against
1068 * the plugins directory.
1069 *
1070 * @param string $url
1071 * @param string $md5
1072 * @return string|bool full path to the file, false on error
1073 */
1074 public function get_remote_plugin_zip($url, $md5) {
1075 return $this->get_code_manager()->get_remote_plugin_zip($url, $md5);
1076 }
1077
1078 /**
1079 * Extracts the saved plugin ZIP file.
1080 *
1081 * Returns the list of files found in the ZIP. The format of that list is
1082 * array of (string)filerelpath => (bool|string) where the array value is
1083 * either true or a string describing the problematic file.
1084 *
1085 * @see zip_packer::extract_to_pathname()
1086 * @param string $zipfilepath full path to the saved ZIP file
1087 * @param string $targetdir full path to the directory to extract the ZIP file to
1088 * @param string $rootdir explicitly rename the root directory of the ZIP into this non-empty value
1089 * @param array list of extracted files as returned by {@link zip_packer::extract_to_pathname()}
1090 */
1091 public function unzip_plugin_file($zipfilepath, $targetdir, $rootdir = '') {
1092 return $this->get_code_manager()->unzip_plugin_file($zipfilepath, $targetdir, $rootdir);
1093 }
1094
1095 /**
1096 * Return a list of missing dependencies.
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1097 *
1098 * This should provide the full list of plugins that should be installed to
1099 * fulfill the requirements of all plugins, if possible.
1100 *
0e442ee7 1101 * @param bool $availableonly return only available missing dependencies
4f18a4e6 1102 * @return array of \core\update\remote_info|bool indexed by the component name
5a92cd0b 1103 */
0e442ee7 1104 public function missing_dependencies($availableonly=false) {
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1105
1106 $dependencies = array();
1107
1108 foreach ($this->get_plugins() as $plugintype => $pluginfos) {
1109 foreach ($pluginfos as $pluginname => $pluginfo) {
1110 foreach ($this->resolve_requirements($pluginfo) as $reqname => $reqinfo) {
1111 if ($reqname === 'core') {
1112 continue;
1113 }
1114 if ($reqinfo->status != self::REQUIREMENT_STATUS_OK) {
1115 if ($reqinfo->availability == self::REQUIREMENT_AVAILABLE) {
35f2b674 1116 $remoteinfo = $this->get_remote_plugin_info($reqname, $reqinfo->reqver, false);
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1117
1118 if (empty($dependencies[$reqname])) {
1119 $dependencies[$reqname] = $remoteinfo;
1120 } else {
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1121 // If resolving requirements has led to two different versions of the same
1122 // remote plugin, pick the higher version. This can happen in cases like one
1123 // plugin requiring ANY_VERSION and another plugin requiring specific higher
1124 // version with lower maturity of a remote plugin.
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1125 if ($remoteinfo->version->version > $dependencies[$reqname]->version->version) {
1126 $dependencies[$reqname] = $remoteinfo;
1127 }
1128 }
1129
1130 } else {
1131 if (!isset($dependencies[$reqname])) {
1132 // Unable to find a plugin fulfilling the requirements.
1133 $dependencies[$reqname] = false;
1134 }
1135 }
1136 }
1137 }
1138 }
1139 }
1140
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1141 if ($availableonly) {
1142 foreach ($dependencies as $component => $info) {
1143 if (empty($info) or empty($info->version)) {
1144 unset($dependencies[$component]);
1145 }
1146 }
1147 }
1148
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1149 return $dependencies;
1150 }
1151
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1152 /**
1153 * Is it possible to uninstall the given plugin?
1154 *
1155 * False is returned if the plugininfo subclass declares the uninstall should
1156 * not be allowed via {@link \core\plugininfo\base::is_uninstall_allowed()} or if the
1157 * core vetoes it (e.g. becase the plugin or some of its subplugins is required
1158 * by some other installed plugin).
1159 *
1160 * @param string $component full frankenstyle name, e.g. mod_foobar
1161 * @return bool
1162 */
1163 public function can_uninstall_plugin($component) {
1164
1165 $pluginfo = $this->get_plugin_info($component);
1166
1167 if (is_null($pluginfo)) {
1168 return false;
1169 }
1170
1171 if (!$this->common_uninstall_check($pluginfo)) {
1172 return false;
1173 }
1174
1175 // Verify only if something else requires the subplugins, do not verify their common_uninstall_check()!
1176 $subplugins = $this->get_subplugins_of_plugin($pluginfo->component);
1177 foreach ($subplugins as $subpluginfo) {
1178 // Check if there are some other plugins requiring this subplugin
1179 // (but the parent and siblings).
1180 foreach ($this->other_plugins_that_require($subpluginfo->component) as $requiresme) {
1181 $ismyparent = ($pluginfo->component === $requiresme);
1182 $ismysibling = in_array($requiresme, array_keys($subplugins));
1183 if (!$ismyparent and !$ismysibling) {
1184 return false;
1185 }
1186 }
1187 }
1188
1189 // Check if there are some other plugins requiring this plugin
1190 // (but its subplugins).
1191 foreach ($this->other_plugins_that_require($pluginfo->component) as $requiresme) {
1192 $ismysubplugin = in_array($requiresme, array_keys($subplugins));
1193 if (!$ismysubplugin) {
1194 return false;
1195 }
1196 }
1197
1198 return true;
1199 }
1200
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1201 /**
1202 * Perform the installation of plugins available in the plugins directory.
1203 *
1204 * The list of plugins is supposed to be processed by
1205 * {@link self::filter_installable()} to make sure all the plugins are
1206 * valid.
1207 *
1208 * @param array $plugins list of installable remote plugins
1209 * @param bool $confirmed should the files be really deployed into the dirroot?
1210 * @param bool $silent perform without output
1211 * @return bool true on success
1212 */
1213 public function install_remote_plugins(array $plugins, $confirmed, $silent) {
1214 global $CFG, $OUTPUT;
1215
1216 if (empty($plugins)) {
1217 return false;
1218 }
1219
1220 $ok = get_string('ok', 'core');
1221
1222 // Let admins know they can expect more verbose output.
1223 $silent or $this->mtrace(get_string('packagesdebug', 'core_plugin'), PHP_EOL, DEBUG_NORMAL);
1224
1225 // Download all ZIP packages if we do not have them yet.
1226 $silent or $this->mtrace(get_string('packagesdownloading', 'core_plugin'), ' ... ');
1227 $zips = array();
1228 foreach ($plugins as $plugin) {
1229 $zips[$plugin->component] = $this->get_remote_plugin_zip($plugin->version->downloadurl, $plugin->version->downloadmd5);
1230 $silent or $this->mtrace(PHP_EOL.$plugin->version->downloadurl, '', DEBUG_DEVELOPER);
1231 $silent or $this->mtrace(PHP_EOL.' -> '.$zips[$plugin->component], ' ... ', DEBUG_DEVELOPER);
1232 if (!$zips[$plugin->component]) {
1233 $silent or $this->mtrace(get_string('error'));
1234 return false;
1235 }
1236 }
1237 $silent or $this->mtrace($ok);
1238
1239 // Validate all downloaded packages.
1240 $silent or $this->mtrace(get_string('packagesvalidating', 'core_plugin'), ' ... '.PHP_EOL);
1241 foreach ($plugins as $plugin) {
1242 $zipfile = $zips[$plugin->component];
1243 $silent or $this->mtrace('* '.s($plugin->name). ' ('.$plugin->component.')', ' ... ');
1244 list($plugintype, $pluginname) = core_component::normalize_component($plugin->component);
1245 $tmp = make_request_directory();
1246 $zipcontents = $this->unzip_plugin_file($zipfile, $tmp, $pluginname);
1247 if (empty($zipcontents)) {
1248 $silent or $this->mtrace(get_string('error'));
1249 $silent or $this->mtrace('Unable to unzip '.$zipfile, PHP_EOL, DEBUG_DEVELOPER);
1250 return false;
1251 }
1252
1253 $validator = \core\update\validator::instance($tmp, $zipcontents);
1254 $validator->assert_plugin_type($plugintype);
1255 $validator->assert_moodle_version($CFG->version);
1256 // TODO Check for missing dependencies during validation.
1257 $result = $validator->execute();
1258 if (!$silent) {
1259 $result ? $this->mtrace($ok) : $this->mtrace(get_string('error'));
1260 foreach ($validator->get_messages() as $message) {
1261 if ($message->level === $validator::INFO) {
1262 // Display [OK] validation messages only if debugging mode is DEBUG_NORMAL.
1263 $level = DEBUG_NORMAL;
1264 } else if ($message->level === $validator::DEBUG) {
1265 // Display [Debug] validation messages only if debugging mode is DEBUG_ALL.
1266 $level = DEBUG_ALL;
1267 } else {
1268 // Display [Warning] and [Error] always.
1269 $level = null;
1270 }
1271 if ($message->level === $validator::WARNING and !CLI_SCRIPT) {
1272 $this->mtrace(' <strong>['.$validator->message_level_name($message->level).']</strong>', ' ', $level);
1273 } else {
1274 $this->mtrace(' ['.$validator->message_level_name($message->level).']', ' ', $level);
1275 }
1276 $this->mtrace($validator->message_code_name($message->msgcode), ' ', $level);
1277 $info = $validator->message_code_info($message->msgcode, $message->addinfo);
1278 if ($info) {
1279 $this->mtrace('['.s($info).']', ' ', $level);
1280 } else if (is_string($message->addinfo)) {
1281 $this->mtrace('['.s($message->addinfo, true).']', ' ', $level);
1282 } else {
1283 $this->mtrace('['.s(json_encode($message->addinfo, true)).']', ' ', $level);
1284 }
1285 if ($icon = $validator->message_help_icon($message->msgcode)) {
1286 if (CLI_SCRIPT) {
1287 $this->mtrace(PHP_EOL.' ^^^ '.get_string('help').': '.
1288 get_string($icon->identifier.'_help', $icon->component), '', $level);
1289 } else {
1290 $this->mtrace($OUTPUT->render($icon), ' ', $level);
1291 }
1292 }
1293 $this->mtrace(PHP_EOL, '', $level);
1294 }
1295 }
1296 if (!$result) {
1297 $silent or $this->mtrace(get_string('packagesvalidatingfailed', 'core_plugin'));
1298 return false;
1299 }
1300 }
1301 $silent or $this->mtrace(PHP_EOL.get_string('packagesvalidatingok', 'core_plugin'));
1302
1303 if (!$confirmed) {
1304 return true;
1305 }
1306
1307 // Extract all ZIP packs do the dirroot.
1308 $silent or $this->mtrace(get_string('packagesextracting', 'core_plugin'), ' ... '.PHP_EOL);
1309 foreach ($plugins as $plugin) {
1310 $silent or $this->mtrace('* '.s($plugin->name). ' ('.$plugin->component.')', ' ... ');
1311 $zipfile = $zips[$plugin->component];
1312 list($plugintype, $pluginname) = core_component::normalize_component($plugin->component);
1313 $target = $this->get_plugintype_root($plugintype);
1314 if (file_exists($target.'/'.$pluginname)) {
1315 $current = $this->get_plugin_info($plugin->component);
1316 if ($current->versiondb and $current->versiondb == $current->versiondisk) {
1317 // TODO Archive existing version so that we can revert.
1318 }
1319 remove_dir($target.'/'.$pluginname);
1320 }
1321 if (!$this->unzip_plugin_file($zipfile, $target, $pluginname)) {
1322 $silent or $this->mtrace(get_string('error'));
1323 $silent or $this->mtrace('Unable to unzip '.$zipfile, PHP_EOL, DEBUG_DEVELOPER);
1324 return false;
1325 }
1326 $silent or $this->mtrace($ok);
1327 }
1328
1329 return true;
1330 }
1331
1332 /**
1333 * Outputs the given message via {@link mtrace()}.
1334 *
1335 * If $debug is provided, then the message is displayed only at the given
1336 * debugging level (e.g. DEBUG_DEVELOPER to display the message only if the
1337 * site has developer debugging level selected).
1338 *
1339 * @param string $msg message
1340 * @param string $eol end of line
1341 * @param null|int $debug null to display always, int only on given debug level
1342 */
1343 protected function mtrace($msg, $eol=PHP_EOL, $debug=null) {
1344 global $CFG;
1345
1346 if ($debug !== null and !debugging(null, $debug)) {
1347 return;
1348 }
1349
1350 mtrace($msg, $eol);
1351 }
1352
e87214bd
PS
1353 /**
1354 * Returns uninstall URL if exists.
1355 *
1356 * @param string $component
1357 * @param string $return either 'overview' or 'manage'
1358 * @return moodle_url uninstall URL, null if uninstall not supported
1359 */
1360 public function get_uninstall_url($component, $return = 'overview') {
1361 if (!$this->can_uninstall_plugin($component)) {
1362 return null;
1363 }
1364
1365 $pluginfo = $this->get_plugin_info($component);
1366
1367 if (is_null($pluginfo)) {
1368 return null;
1369 }
1370
1371 if (method_exists($pluginfo, 'get_uninstall_url')) {
1372 debugging('plugininfo method get_uninstall_url() is deprecated, all plugins should be uninstalled via standard URL only.');
1373 return $pluginfo->get_uninstall_url($return);
1374 }
1375
1376 return $pluginfo->get_default_uninstall_url($return);
1377 }
1378
1379 /**
1380 * Uninstall the given plugin.
1381 *
1382 * Automatically cleans-up all remaining configuration data, log records, events,
1383 * files from the file pool etc.
1384 *
1385 * In the future, the functionality of {@link uninstall_plugin()} function may be moved
1386 * into this method and all the code should be refactored to use it. At the moment, we
1387 * mimic this future behaviour by wrapping that function call.
1388 *
1389 * @param string $component
1390 * @param progress_trace $progress traces the process
1391 * @return bool true on success, false on errors/problems
1392 */
1393 public function uninstall_plugin($component, progress_trace $progress) {
1394
1395 $pluginfo = $this->get_plugin_info($component);
1396
1397 if (is_null($pluginfo)) {
1398 return false;
1399 }
1400
1401 // Give the pluginfo class a chance to execute some steps.
1402 $result = $pluginfo->uninstall($progress);
1403 if (!$result) {
1404 return false;
1405 }
1406
1407 // Call the legacy core function to uninstall the plugin.
1408 ob_start();
1409 uninstall_plugin($pluginfo->type, $pluginfo->name);
1410 $progress->output(ob_get_clean());
1411
1412 return true;
1413 }
1414
1415 /**
1416 * Checks if there are some plugins with a known available update
1417 *
1418 * @return bool true if there is at least one available update
1419 */
1420 public function some_plugins_updatable() {
1421 foreach ($this->get_plugins() as $type => $plugins) {
1422 foreach ($plugins as $plugin) {
1423 if ($plugin->available_updates()) {
1424 return true;
1425 }
1426 }
1427 }
1428
1429 return false;
1430 }
1431
c44bbe35
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1432 /**
1433 * Returns list of available updates for the given component.
1434 *
1435 * This method should be considered as internal API and is supposed to be
1436 * called by {@link \core\plugininfo\base::available_updates()} only
1437 * to lazy load the data once they are first requested.
1438 *
1439 * @param string $component frankenstyle name of the plugin
1440 * @return null|array array of \core\update\info objects or null
1441 */
1442 public function load_available_updates_for_plugin($component) {
1443 global $CFG;
1444
1445 $provider = \core\update\checker::instance();
1446
1447 if (!$provider->enabled() or during_initial_install()) {
1448 return null;
1449 }
1450
1451 if (isset($CFG->updateminmaturity)) {
1452 $minmaturity = $CFG->updateminmaturity;
1453 } else {
1454 // This can happen during the very first upgrade to 2.3.
1455 $minmaturity = MATURITY_STABLE;
1456 }
1457
1458 return $provider->get_update_info($component, array('minmaturity' => $minmaturity));
1459 }
1460
cc5bc55e
DM
1461 /**
1462 * Returns a list of all available updates to be installed.
1463 *
1464 * This is used when "update all plugins" action is performed at the
1465 * administration UI screen.
1466 *
1467 * Returns array of remote info objects indexed by the plugin
1468 * component. If there are multiple updates available (typically a mix of
1469 * stable and non-stable ones), we pick the most mature most recent one.
1470 *
1471 * Plugins without explicit maturity are considered more mature than
1472 * release candidates but less mature than explicit stable (this should be
1473 * pretty rare case).
1474 *
4f18a4e6 1475 * @return array (string)component => (\core\update\remote_info)remoteinfo
cc5bc55e
DM
1476 */
1477 public function available_updates() {
1478
1479 $updates = array();
1480
1481 foreach ($this->get_plugins() as $type => $plugins) {
1482 foreach ($plugins as $plugin) {
1483 $availableupdates = $plugin->available_updates();
1484 if (empty($availableupdates)) {
1485 continue;
1486 }
1487 foreach ($availableupdates as $update) {
1488 if (empty($updates[$plugin->component])) {
1489 $updates[$plugin->component] = $update;
1490 continue;
1491 }
1492 $maturitycurrent = $updates[$plugin->component]->maturity;
1493 if (empty($maturitycurrent)) {
1494 $maturitycurrent = MATURITY_STABLE - 25;
1495 }
1496 $maturityremote = $update->maturity;
1497 if (empty($maturityremote)) {
1498 $maturityremote = MATURITY_STABLE - 25;
1499 }
1500 if ($maturityremote < $maturitycurrent) {
1501 continue;
1502 }
1503 if ($maturityremote > $maturitycurrent) {
1504 $updates[$plugin->component] = $update;
1505 continue;
1506 }
1507 if ($update->version > $updates[$plugin->component]->version) {
1508 $updates[$plugin->component] = $update;
1509 continue;
1510 }
1511 }
1512 }
1513 }
1514
1515 foreach ($updates as $component => $update) {
1516 $remoteinfo = $this->get_remote_plugin_info($component, $update->version, true);
1517 if (empty($remoteinfo) or empty($remoteinfo->version)) {
1518 unset($updates[$component]);
1519 } else {
1520 $updates[$component] = $remoteinfo;
1521 }
1522 }
1523
1524 return $updates;
1525 }
1526
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1527 /**
1528 * Check to see if the given plugin folder can be removed by the web server process.
1529 *
1530 * @param string $component full frankenstyle component
1531 * @return bool
1532 */
1533 public function is_plugin_folder_removable($component) {
1534
1535 $pluginfo = $this->get_plugin_info($component);
1536
1537 if (is_null($pluginfo)) {
1538 return false;
1539 }
1540
1541 // To be able to remove the plugin folder, its parent must be writable, too.
1542 if (!is_writable(dirname($pluginfo->rootdir))) {
1543 return false;
1544 }
1545
1546 // Check that the folder and all its content is writable (thence removable).
1547 return $this->is_directory_removable($pluginfo->rootdir);
1548 }
1549
0e442ee7
DM
1550 /**
1551 * Is it possible to create a new plugin directory for the given plugin type?
1552 *
1553 * @throws coding_exception for invalid plugin types or non-existing plugin type locations
1554 * @param string $plugintype
1555 * @return boolean
1556 */
1557 public function is_plugintype_writable($plugintype) {
1558
1559 $plugintypepath = $this->get_plugintype_root($plugintype);
1560
1561 if (is_null($plugintypepath)) {
1562 throw new coding_exception('Unknown plugin type: '.$plugintype);
1563 }
1564
1565 if ($plugintypepath === false) {
1566 throw new coding_exception('Plugin type location does not exist: '.$plugintype);
1567 }
1568
1569 return is_writable($plugintypepath);
1570 }
1571
1572 /**
1573 * Returns the full path of the root of the given plugin type
1574 *
1575 * Null is returned if the plugin type is not known. False is returned if
1576 * the plugin type root is expected but not found. Otherwise, string is
1577 * returned.
1578 *
1579 * @param string $plugintype
1580 * @return string|bool|null
1581 */
1582 public function get_plugintype_root($plugintype) {
1583
1584 $plugintypepath = null;
1585 foreach (core_component::get_plugin_types() as $type => $fullpath) {
1586 if ($type === $plugintype) {
1587 $plugintypepath = $fullpath;
1588 break;
1589 }
1590 }
1591 if (is_null($plugintypepath)) {
1592 return null;
1593 }
1594 if (!is_dir($plugintypepath)) {
1595 return false;
1596 }
1597
1598 return $plugintypepath;
1599 }
1600
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PS
1601 /**
1602 * Defines a list of all plugins that were originally shipped in the standard Moodle distribution,
1603 * but are not anymore and are deleted during upgrades.
1604 *
1605 * The main purpose of this list is to hide missing plugins during upgrade.
1606 *
1607 * @param string $type plugin type
1608 * @param string $name plugin name
1609 * @return bool
1610 */
1611 public static function is_deleted_standard_plugin($type, $name) {
1612 // Do not include plugins that were removed during upgrades to versions that are
1613 // not supported as source versions for upgrade any more. For example, at MOODLE_23_STABLE
1614 // branch, listed should be no plugins that were removed at 1.9.x - 2.1.x versions as
1615 // Moodle 2.3 supports upgrades from 2.2.x only.
1616 $plugins = array(
a75fa4c0 1617 'qformat' => array('blackboard', 'learnwise'),
e87214bd 1618 'enrol' => array('authorize'),
1170df12 1619 'tinymce' => array('dragmath'),
d6e7a63d 1620 'tool' => array('bloglevelupgrade', 'qeupgradehelper', 'timezoneimport'),
7a2dabcb
FM
1621 'theme' => array('mymobile', 'afterburner', 'anomaly', 'arialist', 'binarius', 'boxxie', 'brick', 'formal_white',
1622 'formfactor', 'fusion', 'leatherbound', 'magazine', 'nimble', 'nonzero', 'overlay', 'serenity', 'sky_high',
1623 'splash', 'standard', 'standardold'),
e87214bd
PS
1624 );
1625
1626 if (!isset($plugins[$type])) {
1627 return false;
1628 }
1629 return in_array($name, $plugins[$type]);
1630 }
1631
1632 /**
1633 * Defines a white list of all plugins shipped in the standard Moodle distribution
1634 *
1635 * @param string $type
1636 * @return false|array array of standard plugins or false if the type is unknown
1637 */
1638 public static function standard_plugins_list($type) {
1639
1640 $standard_plugins = array(
1641
adca7326 1642 'atto' => array(
205c6db5
MG
1643 'accessibilitychecker', 'accessibilityhelper', 'align',
1644 'backcolor', 'bold', 'charmap', 'clear', 'collapse', 'emoticon',
1645 'equation', 'fontcolor', 'html', 'image', 'indent', 'italic',
1646 'link', 'managefiles', 'media', 'noautolink', 'orderedlist',
1647 'rtl', 'strike', 'subscript', 'superscript', 'table', 'title',
49a510ef 1648 'underline', 'undo', 'unorderedlist'
adca7326
DW
1649 ),
1650
e87214bd
PS
1651 'assignment' => array(
1652 'offline', 'online', 'upload', 'uploadsingle'
1653 ),
1654
1655 'assignsubmission' => array(
1656 'comments', 'file', 'onlinetext'
1657 ),
1658
1659 'assignfeedback' => array(
1660 'comments', 'file', 'offline', 'editpdf'
1661 ),
1662
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PS
1663 'auth' => array(
1664 'cas', 'db', 'email', 'fc', 'imap', 'ldap', 'manual', 'mnet',
1665 'nntp', 'nologin', 'none', 'pam', 'pop3', 'radius',
1666 'shibboleth', 'webservice'
1667 ),
1668
d3db4b03 1669 'availability' => array(
1670 'completion', 'date', 'grade', 'group', 'grouping', 'profile'
1671 ),
1672
e87214bd 1673 'block' => array(
d6383f6a
SB
1674 'activity_modules', 'activity_results', 'admin_bookmarks', 'badges',
1675 'blog_menu', 'blog_recent', 'blog_tags', 'calendar_month',
e87214bd
PS
1676 'calendar_upcoming', 'comments', 'community',
1677 'completionstatus', 'course_list', 'course_overview',
1678 'course_summary', 'feedback', 'glossary_random', 'html',
1679 'login', 'mentees', 'messages', 'mnet_hosts', 'myprofile',
1680 'navigation', 'news_items', 'online_users', 'participants',
1681 'private_files', 'quiz_results', 'recent_activity',
1682 'rss_client', 'search_forums', 'section_links',
1683 'selfcompletion', 'settings', 'site_main_menu',
1684 'social_activities', 'tag_flickr', 'tag_youtube', 'tags'
1685 ),
1686
1687 'booktool' => array(
1688 'exportimscp', 'importhtml', 'print'
1689 ),
1690
1691 'cachelock' => array(
1692 'file'
1693 ),
1694
1695 'cachestore' => array(
1696 'file', 'memcache', 'memcached', 'mongodb', 'session', 'static'
1697 ),
1698
1699 'calendartype' => array(
1700 'gregorian'
1701 ),
1702
1703 'coursereport' => array(
1704 // Deprecated!
1705 ),
1706
1707 'datafield' => array(
1708 'checkbox', 'date', 'file', 'latlong', 'menu', 'multimenu',
1709 'number', 'picture', 'radiobutton', 'text', 'textarea', 'url'
1710 ),
1711
1712 'datapreset' => array(
1713 'imagegallery'
1714 ),
1715
1716 'editor' => array(
205c6db5 1717 'atto', 'textarea', 'tinymce'
e87214bd
PS
1718 ),
1719
1720 'enrol' => array(
1721 'category', 'cohort', 'database', 'flatfile',
1722 'guest', 'imsenterprise', 'ldap', 'manual', 'meta', 'mnet',
1723 'paypal', 'self'
1724 ),
1725
1726 'filter' => array(
1727 'activitynames', 'algebra', 'censor', 'emailprotect',
289ed254 1728 'emoticon', 'mathjaxloader', 'mediaplugin', 'multilang', 'tex', 'tidy',
e87214bd
PS
1729 'urltolink', 'data', 'glossary'
1730 ),
1731
1732 'format' => array(
1733 'singleactivity', 'social', 'topics', 'weeks'
1734 ),
1735
1736 'gradeexport' => array(
1737 'ods', 'txt', 'xls', 'xml'
1738 ),
1739
1740 'gradeimport' => array(
aa60bda9 1741 'csv', 'direct', 'xml'
e87214bd
PS
1742 ),
1743
1744 'gradereport' => array(
8ec7b088 1745 'grader', 'history', 'outcomes', 'overview', 'user', 'singleview'
e87214bd
PS
1746 ),
1747
1748 'gradingform' => array(
1749 'rubric', 'guide'
1750 ),
1751
1752 'local' => array(
1753 ),
1754
7eaca5a8
1755 'logstore' => array(
1756 'database', 'legacy', 'standard',
1757 ),
1758
e3f69b58 1759 'ltiservice' => array(
3562c426 1760 'memberships', 'profile', 'toolproxy', 'toolsettings'
e3f69b58 1761 ),
1762
e87214bd 1763 'message' => array(
324facf4 1764 'airnotifier', 'email', 'jabber', 'popup'
e87214bd
PS
1765 ),
1766
1767 'mnetservice' => array(
1768 'enrol'
1769 ),
1770
1771 'mod' => array(
1772 'assign', 'assignment', 'book', 'chat', 'choice', 'data', 'feedback', 'folder',
1773 'forum', 'glossary', 'imscp', 'label', 'lesson', 'lti', 'page',
1774 'quiz', 'resource', 'scorm', 'survey', 'url', 'wiki', 'workshop'
1775 ),
1776
1777 'plagiarism' => array(
1778 ),
1779
1780 'portfolio' => array(
1781 'boxnet', 'download', 'flickr', 'googledocs', 'mahara', 'picasa'
1782 ),
1783
1784 'profilefield' => array(
1785 'checkbox', 'datetime', 'menu', 'text', 'textarea'
1786 ),
1787
1788 'qbehaviour' => array(
1789 'adaptive', 'adaptivenopenalty', 'deferredcbm',
1790 'deferredfeedback', 'immediatecbm', 'immediatefeedback',
1791 'informationitem', 'interactive', 'interactivecountback',
1792 'manualgraded', 'missing'
1793 ),
1794
1795 'qformat' => array(
1796 'aiken', 'blackboard_six', 'examview', 'gift',
a75fa4c0 1797 'missingword', 'multianswer', 'webct',
e87214bd
PS
1798 'xhtml', 'xml'
1799 ),
1800
1801 'qtype' => array(
1802 'calculated', 'calculatedmulti', 'calculatedsimple',
6e28e150
TH
1803 'ddimageortext', 'ddmarker', 'ddwtos', 'description',
1804 'essay', 'gapselect', 'match', 'missingtype', 'multianswer',
e87214bd
PS
1805 'multichoice', 'numerical', 'random', 'randomsamatch',
1806 'shortanswer', 'truefalse'
1807 ),
1808
1809 'quiz' => array(
1810 'grading', 'overview', 'responses', 'statistics'
1811 ),
1812
1813 'quizaccess' => array(
1814 'delaybetweenattempts', 'ipaddress', 'numattempts', 'openclosedate',
1815 'password', 'safebrowser', 'securewindow', 'timelimit'
1816 ),
1817
1818 'report' => array(
4f078f38 1819 'backups', 'completion', 'configlog', 'courseoverview', 'eventlist',
8064168e
PS
1820 'log', 'loglive', 'outline', 'participation', 'progress', 'questioninstances', 'security', 'stats', 'performance',
1821 'usersessions',
e87214bd
PS
1822 ),
1823
1824 'repository' => array(
1825 'alfresco', 'areafiles', 'boxnet', 'coursefiles', 'dropbox', 'equella', 'filesystem',
1826 'flickr', 'flickr_public', 'googledocs', 'local', 'merlot',
1827 'picasa', 'recent', 'skydrive', 's3', 'upload', 'url', 'user', 'webdav',
1828 'wikimedia', 'youtube'
1829 ),
1830
1831 'scormreport' => array(
1832 'basic',
1833 'interactions',
1834 'graphs',
1835 'objectives'
1836 ),
1837
1838 'tinymce' => array(
1170df12 1839 'ctrlhelp', 'managefiles', 'moodleemoticon', 'moodleimage',
e87214bd
PS
1840 'moodlemedia', 'moodlenolink', 'pdw', 'spellchecker', 'wrap'
1841 ),
1842
1843 'theme' => array(
bfb6e97e 1844 'base', 'bootstrapbase', 'canvas', 'clean', 'more'
e87214bd
PS
1845 ),
1846
1847 'tool' => array(
d3db4b03 1848 'assignmentupgrade', 'availabilityconditions', 'behat', 'capability', 'customlang',
ae46ca5f 1849 'dbtransfer', 'filetypes', 'generator', 'health', 'innodb', 'installaddon',
92b40de9 1850 'langimport', 'log', 'messageinbound', 'multilangupgrade', 'monitor', 'phpunit', 'profiling',
274d79c9 1851 'replace', 'spamcleaner', 'task', 'templatelibrary',
e87214bd
PS
1852 'unittest', 'uploadcourse', 'uploaduser', 'unsuproles', 'xmldb'
1853 ),
1854
1855 'webservice' => array(
1856 'amf', 'rest', 'soap', 'xmlrpc'
1857 ),
1858
1859 'workshopallocation' => array(
1860 'manual', 'random', 'scheduled'
1861 ),
1862
1863 'workshopeval' => array(
1864 'best'
1865 ),
1866
1867 'workshopform' => array(
1868 'accumulative', 'comments', 'numerrors', 'rubric'
1869 )
1870 );
1871
1872 if (isset($standard_plugins[$type])) {
1873 return $standard_plugins[$type];
1874 } else {
1875 return false;
1876 }
1877 }
1878
2f29cf6e
DM
1879 /**
1880 * Removes the plugin code directory if it is not installed yet.
1881 *
1882 * This is intended for the plugins check screen to give the admin a chance
1883 * to cancel the installation of just unzipped plugin before the database
1884 * upgrade happens.
1885 *
1886 * @param string $component
1887 * @return bool
1888 */
1889 public function cancel_plugin_installation($component) {
1890
1891 $plugin = $this->get_plugin_info($component);
1892
1893 if (empty($plugin) or $plugin->is_standard() or $plugin->get_status() !== self::PLUGIN_STATUS_NEW
1894 or !$this->is_plugin_folder_removable($plugin->component)) {
1895 return false;
1896 }
1897
1898 return remove_dir($plugin->rootdir);
1899 }
1900
1901 /**
1902 * Cancels installation of all new additional plugins.
1903 */
1904 public function cancel_all_plugin_installations() {
1905
1906 foreach ($this->get_plugins() as $type => $plugins) {
1907 foreach ($plugins as $plugin) {
1908 if (!$plugin->is_standard() and $plugin->get_status() === self::PLUGIN_STATUS_NEW
1909 and $this->is_plugin_folder_removable($plugin->component)) {
1910 $this->cancel_plugin_installation($plugin->component);
1911 }
1912 }
1913 }
1914 }
1915
e87214bd
PS
1916 /**
1917 * Reorders plugin types into a sequence to be displayed
1918 *
1919 * For technical reasons, plugin types returned by {@link core_component::get_plugin_types()} are
1920 * in a certain order that does not need to fit the expected order for the display.
1921 * Particularly, activity modules should be displayed first as they represent the
1922 * real heart of Moodle. They should be followed by other plugin types that are
1923 * used to build the courses (as that is what one expects from LMS). After that,
1924 * other supportive plugin types follow.
1925 *
1926 * @param array $types associative array
1927 * @return array same array with altered order of items
1928 */
1929 protected function reorder_plugin_types(array $types) {
1930 $fix = array('mod' => $types['mod']);
1931 foreach (core_component::get_plugin_list('mod') as $plugin => $fulldir) {
1932 if (!$subtypes = core_component::get_subplugins('mod_'.$plugin)) {
1933 continue;
1934 }
1935 foreach ($subtypes as $subtype => $ignored) {
1936 $fix[$subtype] = $types[$subtype];
1937 }
1938 }
1939
1940 $fix['mod'] = $types['mod'];
1941 $fix['block'] = $types['block'];
1942 $fix['qtype'] = $types['qtype'];
1943 $fix['qbehaviour'] = $types['qbehaviour'];
1944 $fix['qformat'] = $types['qformat'];
1945 $fix['filter'] = $types['filter'];
1946
1947 $fix['editor'] = $types['editor'];
1948 foreach (core_component::get_plugin_list('editor') as $plugin => $fulldir) {
1949 if (!$subtypes = core_component::get_subplugins('editor_'.$plugin)) {
1950 continue;
1951 }
1952 foreach ($subtypes as $subtype => $ignored) {
1953 $fix[$subtype] = $types[$subtype];
1954 }
1955 }
1956
1957 $fix['enrol'] = $types['enrol'];
1958 $fix['auth'] = $types['auth'];
1959 $fix['tool'] = $types['tool'];
1960 foreach (core_component::get_plugin_list('tool') as $plugin => $fulldir) {
1961 if (!$subtypes = core_component::get_subplugins('tool_'.$plugin)) {
1962 continue;
1963 }
1964 foreach ($subtypes as $subtype => $ignored) {
1965 $fix[$subtype] = $types[$subtype];
1966 }
1967 }
1968
1969 foreach ($types as $type => $path) {
1970 if (!isset($fix[$type])) {
1971 $fix[$type] = $path;
1972 }
1973 }
1974 return $fix;
1975 }
1976
1977 /**
1978 * Check if the given directory can be removed by the web server process.
1979 *
1980 * This recursively checks that the given directory and all its contents
1981 * it writable.
1982 *
1983 * @param string $fullpath
1984 * @return boolean
1985 */
8acee4b5 1986 public function is_directory_removable($fullpath) {
e87214bd
PS
1987
1988 if (!is_writable($fullpath)) {
1989 return false;
1990 }
1991
1992 if (is_dir($fullpath)) {
1993 $handle = opendir($fullpath);
1994 } else {
1995 return false;
1996 }
1997
1998 $result = true;
1999
2000 while ($filename = readdir($handle)) {
2001
2002 if ($filename === '.' or $filename === '..') {
2003 continue;
2004 }
2005
2006 $subfilepath = $fullpath.'/'.$filename;
2007
2008 if (is_dir($subfilepath)) {
2009 $result = $result && $this->is_directory_removable($subfilepath);
2010
2011 } else {
2012 $result = $result && is_writable($subfilepath);
2013 }
2014 }
2015
2016 closedir($handle);
2017
2018 return $result;
2019 }
2020
2021 /**
2022 * Helper method that implements common uninstall prerequisites
2023 *
2024 * @param \core\plugininfo\base $pluginfo
2025 * @return bool
2026 */
2027 protected function common_uninstall_check(\core\plugininfo\base $pluginfo) {
2028
2029 if (!$pluginfo->is_uninstall_allowed()) {
2030 // The plugin's plugininfo class declares it should not be uninstalled.
2031 return false;
2032 }
2033
361feecd 2034 if ($pluginfo->get_status() === static::PLUGIN_STATUS_NEW) {
e87214bd
PS
2035 // The plugin is not installed. It should be either installed or removed from the disk.
2036 // Relying on this temporary state may be tricky.
2037 return false;
2038 }
2039
2040 if (method_exists($pluginfo, 'get_uninstall_url') and is_null($pluginfo->get_uninstall_url())) {
2041 // Backwards compatibility.
2042 debugging('\core\plugininfo\base subclasses should use is_uninstall_allowed() instead of returning null in get_uninstall_url()',
2043 DEBUG_DEVELOPER);
2044 return false;
2045 }
2046
2047 return true;
2048 }
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DM
2049
2050 /**
2051 * Returns a code_manager instance to be used for the plugins code operations.
2052 *
2053 * @return \core\update\code_manager
2054 */
2055 protected function get_code_manager() {
2056
2057 if ($this->codemanager === null) {
2058 $this->codemanager = new \core\update\code_manager();
2059 }
2060
2061 return $this->codemanager;
2062 }
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DM
2063
2064 /**
2065 * Returns a client for https://download.moodle.org/api/
2066 *
2067 * @return \core\update\api
2068 */
2069 protected function get_update_api_client() {
2070
2071 if ($this->updateapiclient === null) {
2072 $this->updateapiclient = \core\update\api::client();
2073 }
2074
2075 return $this->updateapiclient;
2076 }
e87214bd 2077}