MDL-49329 admin: Require confirmation before cancelling plugin install
[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
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1095 /**
1096 * Detects the plugin's name from its ZIP file.
1097 *
1098 * Plugin ZIP packages are expected to contain a single directory and the
1099 * directory name would become the plugin name once extracted to the Moodle
1100 * dirroot.
1101 *
1102 * @param string $zipfilepath full path to the ZIP files
1103 * @return string|bool false on error
1104 */
1105 public function get_plugin_zip_root_dir($zipfilepath) {
1106 return $this->get_code_manager()->get_plugin_zip_root_dir($zipfilepath);
1107 }
1108
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1109 /**
1110 * Return a list of missing dependencies.
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1111 *
1112 * This should provide the full list of plugins that should be installed to
1113 * fulfill the requirements of all plugins, if possible.
1114 *
0e442ee7 1115 * @param bool $availableonly return only available missing dependencies
4f18a4e6 1116 * @return array of \core\update\remote_info|bool indexed by the component name
5a92cd0b 1117 */
0e442ee7 1118 public function missing_dependencies($availableonly=false) {
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1119
1120 $dependencies = array();
1121
1122 foreach ($this->get_plugins() as $plugintype => $pluginfos) {
1123 foreach ($pluginfos as $pluginname => $pluginfo) {
1124 foreach ($this->resolve_requirements($pluginfo) as $reqname => $reqinfo) {
1125 if ($reqname === 'core') {
1126 continue;
1127 }
1128 if ($reqinfo->status != self::REQUIREMENT_STATUS_OK) {
1129 if ($reqinfo->availability == self::REQUIREMENT_AVAILABLE) {
35f2b674 1130 $remoteinfo = $this->get_remote_plugin_info($reqname, $reqinfo->reqver, false);
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1131
1132 if (empty($dependencies[$reqname])) {
1133 $dependencies[$reqname] = $remoteinfo;
1134 } else {
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1135 // If resolving requirements has led to two different versions of the same
1136 // remote plugin, pick the higher version. This can happen in cases like one
1137 // plugin requiring ANY_VERSION and another plugin requiring specific higher
1138 // version with lower maturity of a remote plugin.
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1139 if ($remoteinfo->version->version > $dependencies[$reqname]->version->version) {
1140 $dependencies[$reqname] = $remoteinfo;
1141 }
1142 }
1143
1144 } else {
1145 if (!isset($dependencies[$reqname])) {
1146 // Unable to find a plugin fulfilling the requirements.
1147 $dependencies[$reqname] = false;
1148 }
1149 }
1150 }
1151 }
1152 }
1153 }
1154
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1155 if ($availableonly) {
1156 foreach ($dependencies as $component => $info) {
1157 if (empty($info) or empty($info->version)) {
1158 unset($dependencies[$component]);
1159 }
1160 }
1161 }
1162
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1163 return $dependencies;
1164 }
1165
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1166 /**
1167 * Is it possible to uninstall the given plugin?
1168 *
1169 * False is returned if the plugininfo subclass declares the uninstall should
1170 * not be allowed via {@link \core\plugininfo\base::is_uninstall_allowed()} or if the
1171 * core vetoes it (e.g. becase the plugin or some of its subplugins is required
1172 * by some other installed plugin).
1173 *
1174 * @param string $component full frankenstyle name, e.g. mod_foobar
1175 * @return bool
1176 */
1177 public function can_uninstall_plugin($component) {
1178
1179 $pluginfo = $this->get_plugin_info($component);
1180
1181 if (is_null($pluginfo)) {
1182 return false;
1183 }
1184
1185 if (!$this->common_uninstall_check($pluginfo)) {
1186 return false;
1187 }
1188
1189 // Verify only if something else requires the subplugins, do not verify their common_uninstall_check()!
1190 $subplugins = $this->get_subplugins_of_plugin($pluginfo->component);
1191 foreach ($subplugins as $subpluginfo) {
1192 // Check if there are some other plugins requiring this subplugin
1193 // (but the parent and siblings).
1194 foreach ($this->other_plugins_that_require($subpluginfo->component) as $requiresme) {
1195 $ismyparent = ($pluginfo->component === $requiresme);
1196 $ismysibling = in_array($requiresme, array_keys($subplugins));
1197 if (!$ismyparent and !$ismysibling) {
1198 return false;
1199 }
1200 }
1201 }
1202
1203 // Check if there are some other plugins requiring this plugin
1204 // (but its subplugins).
1205 foreach ($this->other_plugins_that_require($pluginfo->component) as $requiresme) {
1206 $ismysubplugin = in_array($requiresme, array_keys($subplugins));
1207 if (!$ismysubplugin) {
1208 return false;
1209 }
1210 }
1211
1212 return true;
1213 }
1214
c948b813 1215 /**
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1216 * Perform the installation of plugins.
1217 *
1218 * If used for installation of remote plugins from the Moodle Plugins
1219 * directory, the $plugins must be list of {@link \core\update\remote_info}
1220 * object that represent installable remote plugins. The caller can use
1221 * {@link self::filter_installable()} to prepare the list.
c948b813 1222 *
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1223 * If used for installation of plugins from locally available ZIP files,
1224 * the $plugins should be list of objects with properties ->component and
1225 * ->zipfilepath.
c948b813 1226 *
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1227 * The method uses {@link mtrace()} to produce direct output and can be
1228 * used in both web and cli interfaces.
1229 *
1230 * @param array $plugins list of plugins
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1231 * @param bool $confirmed should the files be really deployed into the dirroot?
1232 * @param bool $silent perform without output
1233 * @return bool true on success
1234 */
2d00be61 1235 public function install_plugins(array $plugins, $confirmed, $silent) {
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1236 global $CFG, $OUTPUT;
1237
1238 if (empty($plugins)) {
1239 return false;
1240 }
1241
1242 $ok = get_string('ok', 'core');
1243
1244 // Let admins know they can expect more verbose output.
1245 $silent or $this->mtrace(get_string('packagesdebug', 'core_plugin'), PHP_EOL, DEBUG_NORMAL);
1246
1247 // Download all ZIP packages if we do not have them yet.
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1248 $zips = array();
1249 foreach ($plugins as $plugin) {
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1250 if ($plugin instanceof \core\update\remote_info) {
1251 $zips[$plugin->component] = $this->get_remote_plugin_zip($plugin->version->downloadurl,
1252 $plugin->version->downloadmd5);
1253 $silent or $this->mtrace(get_string('packagesdownloading', 'core_plugin', $plugin->component), ' ... ');
1254 $silent or $this->mtrace(PHP_EOL.' <- '.$plugin->version->downloadurl, '', DEBUG_DEVELOPER);
1255 $silent or $this->mtrace(PHP_EOL.' -> '.$zips[$plugin->component], ' ... ', DEBUG_DEVELOPER);
1256 if (!$zips[$plugin->component]) {
1257 $silent or $this->mtrace(get_string('error'));
1258 return false;
1259 }
1260 $silent or $this->mtrace($ok);
1261 } else {
1262 if (empty($plugin->zipfilepath)) {
1263 throw new coding_exception('Unexpected data structure provided');
1264 }
1265 $zips[$plugin->component] = $plugin->zipfilepath;
1266 $silent or $this->mtrace('ZIP '.$plugin->zipfilepath, PHP_EOL, DEBUG_DEVELOPER);
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1267 }
1268 }
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1269
1270 // Validate all downloaded packages.
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1271 foreach ($plugins as $plugin) {
1272 $zipfile = $zips[$plugin->component];
2d00be61 1273 $silent or $this->mtrace(get_string('packagesvalidating', 'core_plugin', $plugin->component), ' ... ');
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1274 list($plugintype, $pluginname) = core_component::normalize_component($plugin->component);
1275 $tmp = make_request_directory();
1276 $zipcontents = $this->unzip_plugin_file($zipfile, $tmp, $pluginname);
1277 if (empty($zipcontents)) {
1278 $silent or $this->mtrace(get_string('error'));
1279 $silent or $this->mtrace('Unable to unzip '.$zipfile, PHP_EOL, DEBUG_DEVELOPER);
1280 return false;
1281 }
1282
1283 $validator = \core\update\validator::instance($tmp, $zipcontents);
1284 $validator->assert_plugin_type($plugintype);
1285 $validator->assert_moodle_version($CFG->version);
1286 // TODO Check for missing dependencies during validation.
1287 $result = $validator->execute();
1288 if (!$silent) {
1289 $result ? $this->mtrace($ok) : $this->mtrace(get_string('error'));
1290 foreach ($validator->get_messages() as $message) {
1291 if ($message->level === $validator::INFO) {
1292 // Display [OK] validation messages only if debugging mode is DEBUG_NORMAL.
1293 $level = DEBUG_NORMAL;
1294 } else if ($message->level === $validator::DEBUG) {
1295 // Display [Debug] validation messages only if debugging mode is DEBUG_ALL.
1296 $level = DEBUG_ALL;
1297 } else {
1298 // Display [Warning] and [Error] always.
1299 $level = null;
1300 }
1301 if ($message->level === $validator::WARNING and !CLI_SCRIPT) {
1302 $this->mtrace(' <strong>['.$validator->message_level_name($message->level).']</strong>', ' ', $level);
1303 } else {
1304 $this->mtrace(' ['.$validator->message_level_name($message->level).']', ' ', $level);
1305 }
1306 $this->mtrace($validator->message_code_name($message->msgcode), ' ', $level);
1307 $info = $validator->message_code_info($message->msgcode, $message->addinfo);
1308 if ($info) {
1309 $this->mtrace('['.s($info).']', ' ', $level);
1310 } else if (is_string($message->addinfo)) {
1311 $this->mtrace('['.s($message->addinfo, true).']', ' ', $level);
1312 } else {
1313 $this->mtrace('['.s(json_encode($message->addinfo, true)).']', ' ', $level);
1314 }
1315 if ($icon = $validator->message_help_icon($message->msgcode)) {
1316 if (CLI_SCRIPT) {
1317 $this->mtrace(PHP_EOL.' ^^^ '.get_string('help').': '.
1318 get_string($icon->identifier.'_help', $icon->component), '', $level);
1319 } else {
1320 $this->mtrace($OUTPUT->render($icon), ' ', $level);
1321 }
1322 }
1323 $this->mtrace(PHP_EOL, '', $level);
1324 }
1325 }
1326 if (!$result) {
1327 $silent or $this->mtrace(get_string('packagesvalidatingfailed', 'core_plugin'));
1328 return false;
1329 }
1330 }
1331 $silent or $this->mtrace(PHP_EOL.get_string('packagesvalidatingok', 'core_plugin'));
1332
1333 if (!$confirmed) {
1334 return true;
1335 }
1336
1337 // Extract all ZIP packs do the dirroot.
c948b813 1338 foreach ($plugins as $plugin) {
2d00be61 1339 $silent or $this->mtrace(get_string('packagesextracting', 'core_plugin', $plugin->component), ' ... ');
c948b813
DM
1340 $zipfile = $zips[$plugin->component];
1341 list($plugintype, $pluginname) = core_component::normalize_component($plugin->component);
1342 $target = $this->get_plugintype_root($plugintype);
1343 if (file_exists($target.'/'.$pluginname)) {
1344 $current = $this->get_plugin_info($plugin->component);
1345 if ($current->versiondb and $current->versiondb == $current->versiondisk) {
1346 // TODO Archive existing version so that we can revert.
1347 }
1348 remove_dir($target.'/'.$pluginname);
1349 }
1350 if (!$this->unzip_plugin_file($zipfile, $target, $pluginname)) {
1351 $silent or $this->mtrace(get_string('error'));
1352 $silent or $this->mtrace('Unable to unzip '.$zipfile, PHP_EOL, DEBUG_DEVELOPER);
da54cf11
DM
1353 if (function_exists('opcache_reset')) {
1354 opcache_reset();
1355 }
c948b813
DM
1356 return false;
1357 }
1358 $silent or $this->mtrace($ok);
1359 }
da54cf11
DM
1360 if (function_exists('opcache_reset')) {
1361 opcache_reset();
1362 }
c948b813
DM
1363
1364 return true;
1365 }
1366
1367 /**
1368 * Outputs the given message via {@link mtrace()}.
1369 *
1370 * If $debug is provided, then the message is displayed only at the given
1371 * debugging level (e.g. DEBUG_DEVELOPER to display the message only if the
1372 * site has developer debugging level selected).
1373 *
1374 * @param string $msg message
1375 * @param string $eol end of line
1376 * @param null|int $debug null to display always, int only on given debug level
1377 */
1378 protected function mtrace($msg, $eol=PHP_EOL, $debug=null) {
1379 global $CFG;
1380
1381 if ($debug !== null and !debugging(null, $debug)) {
1382 return;
1383 }
1384
1385 mtrace($msg, $eol);
1386 }
1387
e87214bd
PS
1388 /**
1389 * Returns uninstall URL if exists.
1390 *
1391 * @param string $component
1392 * @param string $return either 'overview' or 'manage'
1393 * @return moodle_url uninstall URL, null if uninstall not supported
1394 */
1395 public function get_uninstall_url($component, $return = 'overview') {
1396 if (!$this->can_uninstall_plugin($component)) {
1397 return null;
1398 }
1399
1400 $pluginfo = $this->get_plugin_info($component);
1401
1402 if (is_null($pluginfo)) {
1403 return null;
1404 }
1405
1406 if (method_exists($pluginfo, 'get_uninstall_url')) {
1407 debugging('plugininfo method get_uninstall_url() is deprecated, all plugins should be uninstalled via standard URL only.');
1408 return $pluginfo->get_uninstall_url($return);
1409 }
1410
1411 return $pluginfo->get_default_uninstall_url($return);
1412 }
1413
1414 /**
1415 * Uninstall the given plugin.
1416 *
1417 * Automatically cleans-up all remaining configuration data, log records, events,
1418 * files from the file pool etc.
1419 *
1420 * In the future, the functionality of {@link uninstall_plugin()} function may be moved
1421 * into this method and all the code should be refactored to use it. At the moment, we
1422 * mimic this future behaviour by wrapping that function call.
1423 *
1424 * @param string $component
1425 * @param progress_trace $progress traces the process
1426 * @return bool true on success, false on errors/problems
1427 */
1428 public function uninstall_plugin($component, progress_trace $progress) {
1429
1430 $pluginfo = $this->get_plugin_info($component);
1431
1432 if (is_null($pluginfo)) {
1433 return false;
1434 }
1435
1436 // Give the pluginfo class a chance to execute some steps.
1437 $result = $pluginfo->uninstall($progress);
1438 if (!$result) {
1439 return false;
1440 }
1441
1442 // Call the legacy core function to uninstall the plugin.
1443 ob_start();
1444 uninstall_plugin($pluginfo->type, $pluginfo->name);
1445 $progress->output(ob_get_clean());
1446
1447 return true;
1448 }
1449
1450 /**
1451 * Checks if there are some plugins with a known available update
1452 *
1453 * @return bool true if there is at least one available update
1454 */
1455 public function some_plugins_updatable() {
1456 foreach ($this->get_plugins() as $type => $plugins) {
1457 foreach ($plugins as $plugin) {
1458 if ($plugin->available_updates()) {
1459 return true;
1460 }
1461 }
1462 }
1463
1464 return false;
1465 }
1466
c44bbe35
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1467 /**
1468 * Returns list of available updates for the given component.
1469 *
1470 * This method should be considered as internal API and is supposed to be
1471 * called by {@link \core\plugininfo\base::available_updates()} only
1472 * to lazy load the data once they are first requested.
1473 *
1474 * @param string $component frankenstyle name of the plugin
1475 * @return null|array array of \core\update\info objects or null
1476 */
1477 public function load_available_updates_for_plugin($component) {
1478 global $CFG;
1479
1480 $provider = \core\update\checker::instance();
1481
1482 if (!$provider->enabled() or during_initial_install()) {
1483 return null;
1484 }
1485
1486 if (isset($CFG->updateminmaturity)) {
1487 $minmaturity = $CFG->updateminmaturity;
1488 } else {
1489 // This can happen during the very first upgrade to 2.3.
1490 $minmaturity = MATURITY_STABLE;
1491 }
1492
1493 return $provider->get_update_info($component, array('minmaturity' => $minmaturity));
1494 }
1495
cc5bc55e
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1496 /**
1497 * Returns a list of all available updates to be installed.
1498 *
1499 * This is used when "update all plugins" action is performed at the
1500 * administration UI screen.
1501 *
1502 * Returns array of remote info objects indexed by the plugin
1503 * component. If there are multiple updates available (typically a mix of
1504 * stable and non-stable ones), we pick the most mature most recent one.
1505 *
1506 * Plugins without explicit maturity are considered more mature than
1507 * release candidates but less mature than explicit stable (this should be
1508 * pretty rare case).
1509 *
4f18a4e6 1510 * @return array (string)component => (\core\update\remote_info)remoteinfo
cc5bc55e
DM
1511 */
1512 public function available_updates() {
1513
1514 $updates = array();
1515
1516 foreach ($this->get_plugins() as $type => $plugins) {
1517 foreach ($plugins as $plugin) {
1518 $availableupdates = $plugin->available_updates();
1519 if (empty($availableupdates)) {
1520 continue;
1521 }
1522 foreach ($availableupdates as $update) {
1523 if (empty($updates[$plugin->component])) {
1524 $updates[$plugin->component] = $update;
1525 continue;
1526 }
1527 $maturitycurrent = $updates[$plugin->component]->maturity;
1528 if (empty($maturitycurrent)) {
1529 $maturitycurrent = MATURITY_STABLE - 25;
1530 }
1531 $maturityremote = $update->maturity;
1532 if (empty($maturityremote)) {
1533 $maturityremote = MATURITY_STABLE - 25;
1534 }
1535 if ($maturityremote < $maturitycurrent) {
1536 continue;
1537 }
1538 if ($maturityremote > $maturitycurrent) {
1539 $updates[$plugin->component] = $update;
1540 continue;
1541 }
1542 if ($update->version > $updates[$plugin->component]->version) {
1543 $updates[$plugin->component] = $update;
1544 continue;
1545 }
1546 }
1547 }
1548 }
1549
1550 foreach ($updates as $component => $update) {
1551 $remoteinfo = $this->get_remote_plugin_info($component, $update->version, true);
1552 if (empty($remoteinfo) or empty($remoteinfo->version)) {
1553 unset($updates[$component]);
1554 } else {
1555 $updates[$component] = $remoteinfo;
1556 }
1557 }
1558
1559 return $updates;
1560 }
1561
e87214bd
PS
1562 /**
1563 * Check to see if the given plugin folder can be removed by the web server process.
1564 *
1565 * @param string $component full frankenstyle component
1566 * @return bool
1567 */
1568 public function is_plugin_folder_removable($component) {
1569
1570 $pluginfo = $this->get_plugin_info($component);
1571
1572 if (is_null($pluginfo)) {
1573 return false;
1574 }
1575
1576 // To be able to remove the plugin folder, its parent must be writable, too.
1577 if (!is_writable(dirname($pluginfo->rootdir))) {
1578 return false;
1579 }
1580
1581 // Check that the folder and all its content is writable (thence removable).
1582 return $this->is_directory_removable($pluginfo->rootdir);
1583 }
1584
0e442ee7
DM
1585 /**
1586 * Is it possible to create a new plugin directory for the given plugin type?
1587 *
1588 * @throws coding_exception for invalid plugin types or non-existing plugin type locations
1589 * @param string $plugintype
1590 * @return boolean
1591 */
1592 public function is_plugintype_writable($plugintype) {
1593
1594 $plugintypepath = $this->get_plugintype_root($plugintype);
1595
1596 if (is_null($plugintypepath)) {
1597 throw new coding_exception('Unknown plugin type: '.$plugintype);
1598 }
1599
1600 if ($plugintypepath === false) {
1601 throw new coding_exception('Plugin type location does not exist: '.$plugintype);
1602 }
1603
1604 return is_writable($plugintypepath);
1605 }
1606
1607 /**
1608 * Returns the full path of the root of the given plugin type
1609 *
1610 * Null is returned if the plugin type is not known. False is returned if
1611 * the plugin type root is expected but not found. Otherwise, string is
1612 * returned.
1613 *
1614 * @param string $plugintype
1615 * @return string|bool|null
1616 */
1617 public function get_plugintype_root($plugintype) {
1618
1619 $plugintypepath = null;
1620 foreach (core_component::get_plugin_types() as $type => $fullpath) {
1621 if ($type === $plugintype) {
1622 $plugintypepath = $fullpath;
1623 break;
1624 }
1625 }
1626 if (is_null($plugintypepath)) {
1627 return null;
1628 }
1629 if (!is_dir($plugintypepath)) {
1630 return false;
1631 }
1632
1633 return $plugintypepath;
1634 }
1635
e87214bd
PS
1636 /**
1637 * Defines a list of all plugins that were originally shipped in the standard Moodle distribution,
1638 * but are not anymore and are deleted during upgrades.
1639 *
1640 * The main purpose of this list is to hide missing plugins during upgrade.
1641 *
1642 * @param string $type plugin type
1643 * @param string $name plugin name
1644 * @return bool
1645 */
1646 public static function is_deleted_standard_plugin($type, $name) {
1647 // Do not include plugins that were removed during upgrades to versions that are
1648 // not supported as source versions for upgrade any more. For example, at MOODLE_23_STABLE
1649 // branch, listed should be no plugins that were removed at 1.9.x - 2.1.x versions as
1650 // Moodle 2.3 supports upgrades from 2.2.x only.
1651 $plugins = array(
a75fa4c0 1652 'qformat' => array('blackboard', 'learnwise'),
e87214bd 1653 'enrol' => array('authorize'),
1170df12 1654 'tinymce' => array('dragmath'),
d6e7a63d 1655 'tool' => array('bloglevelupgrade', 'qeupgradehelper', 'timezoneimport'),
7a2dabcb
FM
1656 'theme' => array('mymobile', 'afterburner', 'anomaly', 'arialist', 'binarius', 'boxxie', 'brick', 'formal_white',
1657 'formfactor', 'fusion', 'leatherbound', 'magazine', 'nimble', 'nonzero', 'overlay', 'serenity', 'sky_high',
1658 'splash', 'standard', 'standardold'),
e87214bd
PS
1659 );
1660
1661 if (!isset($plugins[$type])) {
1662 return false;
1663 }
1664 return in_array($name, $plugins[$type]);
1665 }
1666
1667 /**
1668 * Defines a white list of all plugins shipped in the standard Moodle distribution
1669 *
1670 * @param string $type
1671 * @return false|array array of standard plugins or false if the type is unknown
1672 */
1673 public static function standard_plugins_list($type) {
1674
1675 $standard_plugins = array(
1676
adca7326 1677 'atto' => array(
205c6db5
MG
1678 'accessibilitychecker', 'accessibilityhelper', 'align',
1679 'backcolor', 'bold', 'charmap', 'clear', 'collapse', 'emoticon',
1680 'equation', 'fontcolor', 'html', 'image', 'indent', 'italic',
1681 'link', 'managefiles', 'media', 'noautolink', 'orderedlist',
1682 'rtl', 'strike', 'subscript', 'superscript', 'table', 'title',
49a510ef 1683 'underline', 'undo', 'unorderedlist'
adca7326
DW
1684 ),
1685
e87214bd
PS
1686 'assignment' => array(
1687 'offline', 'online', 'upload', 'uploadsingle'
1688 ),
1689
1690 'assignsubmission' => array(
1691 'comments', 'file', 'onlinetext'
1692 ),
1693
1694 'assignfeedback' => array(
1695 'comments', 'file', 'offline', 'editpdf'
1696 ),
1697
e87214bd
PS
1698 'auth' => array(
1699 'cas', 'db', 'email', 'fc', 'imap', 'ldap', 'manual', 'mnet',
1700 'nntp', 'nologin', 'none', 'pam', 'pop3', 'radius',
1701 'shibboleth', 'webservice'
1702 ),
1703
d3db4b03 1704 'availability' => array(
1705 'completion', 'date', 'grade', 'group', 'grouping', 'profile'
1706 ),
1707
e87214bd 1708 'block' => array(
d6383f6a
SB
1709 'activity_modules', 'activity_results', 'admin_bookmarks', 'badges',
1710 'blog_menu', 'blog_recent', 'blog_tags', 'calendar_month',
e87214bd
PS
1711 'calendar_upcoming', 'comments', 'community',
1712 'completionstatus', 'course_list', 'course_overview',
1713 'course_summary', 'feedback', 'glossary_random', 'html',
1714 'login', 'mentees', 'messages', 'mnet_hosts', 'myprofile',
1715 'navigation', 'news_items', 'online_users', 'participants',
1716 'private_files', 'quiz_results', 'recent_activity',
1717 'rss_client', 'search_forums', 'section_links',
1718 'selfcompletion', 'settings', 'site_main_menu',
1719 'social_activities', 'tag_flickr', 'tag_youtube', 'tags'
1720 ),
1721
1722 'booktool' => array(
1723 'exportimscp', 'importhtml', 'print'
1724 ),
1725
1726 'cachelock' => array(
1727 'file'
1728 ),
1729
1730 'cachestore' => array(
1731 'file', 'memcache', 'memcached', 'mongodb', 'session', 'static'
1732 ),
1733
1734 'calendartype' => array(
1735 'gregorian'
1736 ),
1737
1738 'coursereport' => array(
1739 // Deprecated!
1740 ),
1741
1742 'datafield' => array(
1743 'checkbox', 'date', 'file', 'latlong', 'menu', 'multimenu',
1744 'number', 'picture', 'radiobutton', 'text', 'textarea', 'url'
1745 ),
1746
1747 'datapreset' => array(
1748 'imagegallery'
1749 ),
1750
1751 'editor' => array(
205c6db5 1752 'atto', 'textarea', 'tinymce'
e87214bd
PS
1753 ),
1754
1755 'enrol' => array(
1756 'category', 'cohort', 'database', 'flatfile',
1757 'guest', 'imsenterprise', 'ldap', 'manual', 'meta', 'mnet',
1758 'paypal', 'self'
1759 ),
1760
1761 'filter' => array(
1762 'activitynames', 'algebra', 'censor', 'emailprotect',
289ed254 1763 'emoticon', 'mathjaxloader', 'mediaplugin', 'multilang', 'tex', 'tidy',
e87214bd
PS
1764 'urltolink', 'data', 'glossary'
1765 ),
1766
1767 'format' => array(
1768 'singleactivity', 'social', 'topics', 'weeks'
1769 ),
1770
1771 'gradeexport' => array(
1772 'ods', 'txt', 'xls', 'xml'
1773 ),
1774
1775 'gradeimport' => array(
aa60bda9 1776 'csv', 'direct', 'xml'
e87214bd
PS
1777 ),
1778
1779 'gradereport' => array(
8ec7b088 1780 'grader', 'history', 'outcomes', 'overview', 'user', 'singleview'
e87214bd
PS
1781 ),
1782
1783 'gradingform' => array(
1784 'rubric', 'guide'
1785 ),
1786
1787 'local' => array(
1788 ),
1789
7eaca5a8
1790 'logstore' => array(
1791 'database', 'legacy', 'standard',
1792 ),
1793
e3f69b58 1794 'ltiservice' => array(
3562c426 1795 'memberships', 'profile', 'toolproxy', 'toolsettings'
e3f69b58 1796 ),
1797
e87214bd 1798 'message' => array(
324facf4 1799 'airnotifier', 'email', 'jabber', 'popup'
e87214bd
PS
1800 ),
1801
1802 'mnetservice' => array(
1803 'enrol'
1804 ),
1805
1806 'mod' => array(
1807 'assign', 'assignment', 'book', 'chat', 'choice', 'data', 'feedback', 'folder',
1808 'forum', 'glossary', 'imscp', 'label', 'lesson', 'lti', 'page',
1809 'quiz', 'resource', 'scorm', 'survey', 'url', 'wiki', 'workshop'
1810 ),
1811
1812 'plagiarism' => array(
1813 ),
1814
1815 'portfolio' => array(
1816 'boxnet', 'download', 'flickr', 'googledocs', 'mahara', 'picasa'
1817 ),
1818
1819 'profilefield' => array(
1820 'checkbox', 'datetime', 'menu', 'text', 'textarea'
1821 ),
1822
1823 'qbehaviour' => array(
1824 'adaptive', 'adaptivenopenalty', 'deferredcbm',
1825 'deferredfeedback', 'immediatecbm', 'immediatefeedback',
1826 'informationitem', 'interactive', 'interactivecountback',
1827 'manualgraded', 'missing'
1828 ),
1829
1830 'qformat' => array(
1831 'aiken', 'blackboard_six', 'examview', 'gift',
a75fa4c0 1832 'missingword', 'multianswer', 'webct',
e87214bd
PS
1833 'xhtml', 'xml'
1834 ),
1835
1836 'qtype' => array(
1837 'calculated', 'calculatedmulti', 'calculatedsimple',
6e28e150
TH
1838 'ddimageortext', 'ddmarker', 'ddwtos', 'description',
1839 'essay', 'gapselect', 'match', 'missingtype', 'multianswer',
e87214bd
PS
1840 'multichoice', 'numerical', 'random', 'randomsamatch',
1841 'shortanswer', 'truefalse'
1842 ),
1843
1844 'quiz' => array(
1845 'grading', 'overview', 'responses', 'statistics'
1846 ),
1847
1848 'quizaccess' => array(
1849 'delaybetweenattempts', 'ipaddress', 'numattempts', 'openclosedate',
1850 'password', 'safebrowser', 'securewindow', 'timelimit'
1851 ),
1852
1853 'report' => array(
4f078f38 1854 'backups', 'completion', 'configlog', 'courseoverview', 'eventlist',
8064168e
PS
1855 'log', 'loglive', 'outline', 'participation', 'progress', 'questioninstances', 'security', 'stats', 'performance',
1856 'usersessions',
e87214bd
PS
1857 ),
1858
1859 'repository' => array(
1860 'alfresco', 'areafiles', 'boxnet', 'coursefiles', 'dropbox', 'equella', 'filesystem',
1861 'flickr', 'flickr_public', 'googledocs', 'local', 'merlot',
1862 'picasa', 'recent', 'skydrive', 's3', 'upload', 'url', 'user', 'webdav',
1863 'wikimedia', 'youtube'
1864 ),
1865
1866 'scormreport' => array(
1867 'basic',
1868 'interactions',
1869 'graphs',
1870 'objectives'
1871 ),
1872
1873 'tinymce' => array(
1170df12 1874 'ctrlhelp', 'managefiles', 'moodleemoticon', 'moodleimage',
e87214bd
PS
1875 'moodlemedia', 'moodlenolink', 'pdw', 'spellchecker', 'wrap'
1876 ),
1877
1878 'theme' => array(
bfb6e97e 1879 'base', 'bootstrapbase', 'canvas', 'clean', 'more'
e87214bd
PS
1880 ),
1881
1882 'tool' => array(
d3db4b03 1883 'assignmentupgrade', 'availabilityconditions', 'behat', 'capability', 'customlang',
ae46ca5f 1884 'dbtransfer', 'filetypes', 'generator', 'health', 'innodb', 'installaddon',
92b40de9 1885 'langimport', 'log', 'messageinbound', 'multilangupgrade', 'monitor', 'phpunit', 'profiling',
274d79c9 1886 'replace', 'spamcleaner', 'task', 'templatelibrary',
e87214bd
PS
1887 'unittest', 'uploadcourse', 'uploaduser', 'unsuproles', 'xmldb'
1888 ),
1889
1890 'webservice' => array(
1891 'amf', 'rest', 'soap', 'xmlrpc'
1892 ),
1893
1894 'workshopallocation' => array(
1895 'manual', 'random', 'scheduled'
1896 ),
1897
1898 'workshopeval' => array(
1899 'best'
1900 ),
1901
1902 'workshopform' => array(
1903 'accumulative', 'comments', 'numerrors', 'rubric'
1904 )
1905 );
1906
1907 if (isset($standard_plugins[$type])) {
1908 return $standard_plugins[$type];
1909 } else {
1910 return false;
1911 }
1912 }
1913
4d7528f9
DM
1914 /**
1915 * Can the installation of the new plugin be cancelled?
1916 *
1917 * @param \core\plugininfo\base $plugin
1918 * @return bool
1919 */
1920 public function can_cancel_plugin_installation(\core\plugininfo\base $plugin) {
1921
1922 if (empty($plugin) or $plugin->is_standard() or !$this->is_plugin_folder_removable($plugin->component)) {
1923 return false;
1924 }
1925
1926 if ($plugin->get_status() === self::PLUGIN_STATUS_NEW) {
1927 return true;
1928 }
1929
1930 return false;
1931 }
1932
2f29cf6e
DM
1933 /**
1934 * Removes the plugin code directory if it is not installed yet.
1935 *
1936 * This is intended for the plugins check screen to give the admin a chance
1937 * to cancel the installation of just unzipped plugin before the database
1938 * upgrade happens.
1939 *
1940 * @param string $component
1941 * @return bool
1942 */
1943 public function cancel_plugin_installation($component) {
1944
1945 $plugin = $this->get_plugin_info($component);
1946
4d7528f9
DM
1947 if ($this->can_cancel_plugin_installation($plugin)) {
1948 if ($this->archive_plugin_version($plugin)) {
1949 return remove_dir($plugin->rootdir);
1950 }
2f29cf6e
DM
1951 }
1952
4d7528f9 1953 return false;
2f29cf6e
DM
1954 }
1955
1956 /**
1957 * Cancels installation of all new additional plugins.
1958 */
1959 public function cancel_all_plugin_installations() {
1960
1961 foreach ($this->get_plugins() as $type => $plugins) {
1962 foreach ($plugins as $plugin) {
4d7528f9 1963 if ($this->can_cancel_plugin_installation($plugin)) {
2f29cf6e
DM
1964 $this->cancel_plugin_installation($plugin->component);
1965 }
1966 }
1967 }
1968 }
1969
4d7528f9
DM
1970 /**
1971 * Archive the current on-disk plugin code.
1972 *
1973 * @param \core\plugiinfo\base $plugin
1974 * @return bool
1975 */
1976 public function archive_plugin_version(\core\plugininfo\base $plugin) {
1977 // TODO use code_manager to do it.
1978 return true;
1979 }
1980
e87214bd
PS
1981 /**
1982 * Reorders plugin types into a sequence to be displayed
1983 *
1984 * For technical reasons, plugin types returned by {@link core_component::get_plugin_types()} are
1985 * in a certain order that does not need to fit the expected order for the display.
1986 * Particularly, activity modules should be displayed first as they represent the
1987 * real heart of Moodle. They should be followed by other plugin types that are
1988 * used to build the courses (as that is what one expects from LMS). After that,
1989 * other supportive plugin types follow.
1990 *
1991 * @param array $types associative array
1992 * @return array same array with altered order of items
1993 */
1994 protected function reorder_plugin_types(array $types) {
1995 $fix = array('mod' => $types['mod']);
1996 foreach (core_component::get_plugin_list('mod') as $plugin => $fulldir) {
1997 if (!$subtypes = core_component::get_subplugins('mod_'.$plugin)) {
1998 continue;
1999 }
2000 foreach ($subtypes as $subtype => $ignored) {
2001 $fix[$subtype] = $types[$subtype];
2002 }
2003 }
2004
2005 $fix['mod'] = $types['mod'];
2006 $fix['block'] = $types['block'];
2007 $fix['qtype'] = $types['qtype'];
2008 $fix['qbehaviour'] = $types['qbehaviour'];
2009 $fix['qformat'] = $types['qformat'];
2010 $fix['filter'] = $types['filter'];
2011
2012 $fix['editor'] = $types['editor'];
2013 foreach (core_component::get_plugin_list('editor') as $plugin => $fulldir) {
2014 if (!$subtypes = core_component::get_subplugins('editor_'.$plugin)) {
2015 continue;
2016 }
2017 foreach ($subtypes as $subtype => $ignored) {
2018 $fix[$subtype] = $types[$subtype];
2019 }
2020 }
2021
2022 $fix['enrol'] = $types['enrol'];
2023 $fix['auth'] = $types['auth'];
2024 $fix['tool'] = $types['tool'];
2025 foreach (core_component::get_plugin_list('tool') as $plugin => $fulldir) {
2026 if (!$subtypes = core_component::get_subplugins('tool_'.$plugin)) {
2027 continue;
2028 }
2029 foreach ($subtypes as $subtype => $ignored) {
2030 $fix[$subtype] = $types[$subtype];
2031 }
2032 }
2033
2034 foreach ($types as $type => $path) {
2035 if (!isset($fix[$type])) {
2036 $fix[$type] = $path;
2037 }
2038 }
2039 return $fix;
2040 }
2041
2042 /**
2043 * Check if the given directory can be removed by the web server process.
2044 *
2045 * This recursively checks that the given directory and all its contents
2046 * it writable.
2047 *
2048 * @param string $fullpath
2049 * @return boolean
2050 */
8acee4b5 2051 public function is_directory_removable($fullpath) {
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PS
2052
2053 if (!is_writable($fullpath)) {
2054 return false;
2055 }
2056
2057 if (is_dir($fullpath)) {
2058 $handle = opendir($fullpath);
2059 } else {
2060 return false;
2061 }
2062
2063 $result = true;
2064
2065 while ($filename = readdir($handle)) {
2066
2067 if ($filename === '.' or $filename === '..') {
2068 continue;
2069 }
2070
2071 $subfilepath = $fullpath.'/'.$filename;
2072
2073 if (is_dir($subfilepath)) {
2074 $result = $result && $this->is_directory_removable($subfilepath);
2075
2076 } else {
2077 $result = $result && is_writable($subfilepath);
2078 }
2079 }
2080
2081 closedir($handle);
2082
2083 return $result;
2084 }
2085
2086 /**
2087 * Helper method that implements common uninstall prerequisites
2088 *
2089 * @param \core\plugininfo\base $pluginfo
2090 * @return bool
2091 */
2092 protected function common_uninstall_check(\core\plugininfo\base $pluginfo) {
2093
2094 if (!$pluginfo->is_uninstall_allowed()) {
2095 // The plugin's plugininfo class declares it should not be uninstalled.
2096 return false;
2097 }
2098
361feecd 2099 if ($pluginfo->get_status() === static::PLUGIN_STATUS_NEW) {
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2100 // The plugin is not installed. It should be either installed or removed from the disk.
2101 // Relying on this temporary state may be tricky.
2102 return false;
2103 }
2104
2105 if (method_exists($pluginfo, 'get_uninstall_url') and is_null($pluginfo->get_uninstall_url())) {
2106 // Backwards compatibility.
2107 debugging('\core\plugininfo\base subclasses should use is_uninstall_allowed() instead of returning null in get_uninstall_url()',
2108 DEBUG_DEVELOPER);
2109 return false;
2110 }
2111
2112 return true;
2113 }
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2114
2115 /**
2116 * Returns a code_manager instance to be used for the plugins code operations.
2117 *
2118 * @return \core\update\code_manager
2119 */
2120 protected function get_code_manager() {
2121
2122 if ($this->codemanager === null) {
2123 $this->codemanager = new \core\update\code_manager();
2124 }
2125
2126 return $this->codemanager;
2127 }
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DM
2128
2129 /**
2130 * Returns a client for https://download.moodle.org/api/
2131 *
2132 * @return \core\update\api
2133 */
2134 protected function get_update_api_client() {
2135
2136 if ($this->updateapiclient === null) {
2137 $this->updateapiclient = \core\update\api::client();
2138 }
2139
2140 return $this->updateapiclient;
2141 }
e87214bd 2142}