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<?php
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// This file is part of Moodle - http://moodle.org/
3
//
4
// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
8
//
9
// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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// GNU General Public License for more details.
13
//
14
// You should have received a copy of the GNU General Public License
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// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
16
 
17
/**
18
 * This file contains the moodle_page class. There is normally a single instance
19
 * of this class in the $PAGE global variable. This class is a central repository
20
 * of information about the page we are building up to send back to the user.
21
 *
22
 * @package core
23
 * @category page
24
 * @copyright  1999 onwards Martin Dougiamas  {@link http://moodle.com}
25
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
26
 */
27
 
1441 ariadna 28
use core\exception\moodle_exception;
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use core\navigation\views\primary;
30
use core\navigation\views\secondary;
31
use core\navigation\output\primary as primaryoutput;
32
use core\output\activity_header;
1441 ariadna 33
use core\output\xhtml_container_stack;
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35
/**
36
 * $PAGE is a central store of information about the current page we are
37
 * generating in response to the user's request.
38
 *
39
 * It does not do very much itself
40
 * except keep track of information, however, it serves as the access point to
41
 * some more significant components like $PAGE->theme, $PAGE->requires,
42
 * $PAGE->blocks, etc.
43
 *
44
 * @copyright 2009 Tim Hunt
45
 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
46
 * @since Moodle 2.0
47
 * @package core
48
 * @category page
49
 *
50
 * The following properties are alphabetical. Please keep it that way so that its
51
 * easy to maintain.
52
 *
53
 * @property-read string $activityname The type of activity we are in, for example 'forum' or 'quiz'.
54
 *      Will be null if this page is not within a module.
55
 * @property-read stdClass $activityrecord The row from the activities own database table (for example
56
 *      the forum or quiz table) that this page belongs to. Will be null
57
 *      if this page is not within a module.
58
 * @property-read activity_header $activityheader The activity header for the page, representing standard components
59
 *      displayed within the header
60
 * @property-read array $alternativeversions Mime type => object with ->url and ->title.
61
 * @property-read block_manager $blocks The blocks manager object for this page.
62
 * @property-read array $blockmanipulations
63
 * @property-read string $bodyclasses A string to use within the class attribute on the body tag.
64
 * @property-read string $bodyid A string to use as the id of the body tag.
65
 * @property-read string $button The HTML to go where the Turn editing on button normally goes.
66
 * @property-read bool $cacheable Defaults to true. Set to false to stop the page being cached at all.
67
 * @property-read array $categories An array of all the categories the page course belongs to,
68
 *      starting with the immediately containing category, and working out to
69
 *      the top-level category. This may be the empty array if we are in the
70
 *      front page course.
71
 * @property-read mixed $category The category that the page course belongs to.
72
 * @property-read cm_info $cm The course_module that this page belongs to. Will be null
73
 *      if this page is not within a module. This is a full cm object, as loaded
74
 *      by get_coursemodule_from_id or get_coursemodule_from_instance,
75
 *      so the extra modname and name fields are present.
76
 * @property-read context $context The main context to which this page belongs.
77
 * @property-read stdClass $course The current course that we are inside - a row from the
78
 *      course table. (Also available as $COURSE global.) If we are not inside
79
 *      an actual course, this will be the site course.
80
 * @property-read string $devicetypeinuse The name of the device type in use
81
 * @property-read string $docspath The path to the Documentation for this page.
82
 * @property-read string $focuscontrol The id of the HTML element to be focused when the page has loaded.
83
 * @property-read bool $headerprinted True if the page header has already been printed.
84
 * @property-read string $heading The main heading that should be displayed at the top of the <body>.
85
 * @property-read string $headingmenu The menu (or actions) to display in the heading
86
 * @property-read array $layout_options An arrays with options for the layout file.
87
 * @property-read array $legacythemeinuse True if the legacy browser theme is in use.
88
 * @property-read navbar $navbar The navbar object used to display the navbar
89
 * @property-read secondary $secondarynav The secondary navigation object
90
 *      used to display the secondarynav in boost
91
 * @property-read primary $primarynav The primary navigation object used to display the primary nav in boost
92
 * @property-read primaryoutput $primarynavcombined The primary navigation object used to display the primary nav in boost
93
 * @property-read global_navigation $navigation The navigation structure for this page.
94
 * @property-read xhtml_container_stack $opencontainers Tracks XHTML tags on this page that have been opened but not closed.
95
 *      mainly for internal use by the rendering code.
96
 * @property-read string $pagelayout The general type of page this is. For example 'normal', 'popup', 'home'.
97
 *      Allows the theme to display things differently, if it wishes to.
98
 * @property-read string $pagetype The page type string, should be used as the id for the body tag in the theme.
99
 * @property-read int $periodicrefreshdelay The periodic refresh delay to use with meta refresh
100
 * @property-read page_requirements_manager $requires Tracks the JavaScript, CSS files, etc. required by this page.
101
 * @property-read string $requestip The IP address of the current request, null if unknown.
102
 * @property-read string $requestorigin The type of request 'web', 'ws', 'cli', 'restore', etc.
103
 * @property-read settings_navigation $settingsnav The settings navigation
104
 * @property-read int $state One of the STATE_... constants
105
 * @property-read string $subpage The subpage identifier, if any.
106
 * @property-read theme_config $theme The theme for this page.
107
 * @property-read string $title The title that should go in the <head> section of the HTML of this page.
108
 * @property-read moodle_url $url The moodle url object for this page.
109
 */
110
class moodle_page {
111
 
112
    /** The state of the page before it has printed the header **/
113
    const STATE_BEFORE_HEADER = 0;
114
 
115
    /** The state the page is in temporarily while the header is being printed **/
116
    const STATE_PRINTING_HEADER = 1;
117
 
118
    /** The state the page is in while content is presumably being printed **/
119
    const STATE_IN_BODY = 2;
120
 
121
    /**
122
     * The state the page is when the footer has been printed and its function is
123
     * complete.
124
     */
125
    const STATE_DONE = 3;
126
 
127
    /**
128
     * The separator used for separating page title elements.
129
     */
130
    const TITLE_SEPARATOR = ' | ';
131
 
132
    /**
133
     * @var int The current state of the page. The state a page is within
134
     * determines what actions are possible for it.
135
     */
136
    protected $_state = self::STATE_BEFORE_HEADER;
137
 
138
    /**
139
     * @var stdClass The course currently associated with this page.
140
     * If not has been provided the front page course is used.
141
     */
142
    protected $_course = null;
143
 
144
    /**
145
     * @var cm_info If this page belongs to a module, this is the cm_info module
146
     * description object.
147
     */
148
    protected $_cm = null;
149
 
150
    /**
151
     * @var stdClass If $_cm is not null, then this will hold the corresponding
152
     * row from the modname table. For example, if $_cm->modname is 'quiz', this
153
     * will be a row from the quiz table.
154
     */
155
    protected $_module = null;
156
 
157
    /**
158
     * @var context The context that this page belongs to.
159
     */
160
    protected $_context = null;
161
 
162
    /**
163
     * @var array This holds any categories that $_course belongs to, starting with the
164
     * particular category it belongs to, and working out through any parent
165
     * categories to the top level. These are loaded progressively, if needed.
166
     * There are three states. $_categories = null initially when nothing is
167
     * loaded; $_categories = array($id => $cat, $parentid => null) when we have
168
     * loaded $_course->category, but not any parents; and a complete array once
169
     * everything is loaded.
170
     */
171
    protected $_categories = null;
172
 
173
    /**
174
     * @var array An array of CSS classes that should be added to the body tag in HTML.
175
     */
176
    protected $_bodyclasses = array();
177
 
178
    /**
179
     * @var string The title for the page. Used within the title tag in the HTML head.
180
     */
181
    protected $_title = '';
182
 
183
    /**
184
     * @var string The string to use as the heading of the page. Shown near the top of the
185
     * page within most themes.
186
     */
187
    protected $_heading = '';
188
 
189
    /**
190
     * @var string The pagetype is used to describe the page and defaults to a representation
191
     * of the physical path to the page e.g. my-index, mod-quiz-attempt
192
     */
193
    protected $_pagetype = null;
194
 
195
    /**
196
     * @var string The pagelayout to use when displaying this page. The
197
     * pagelayout needs to have been defined by the theme in use, or one of its
198
     * parents. By default base is used however standard is the more common layout.
199
     * Note that this gets automatically set by core during operations like
200
     * require_login.
201
     */
202
    protected $_pagelayout = 'base';
203
 
204
    /**
205
     * @var array List of theme layout options, these are ignored by core.
206
     * To be used in individual theme layout files only.
207
     */
208
    protected $_layout_options = null;
209
 
210
    /**
211
     * @var string An optional arbitrary parameter that can be set on pages where the context
212
     * and pagetype is not enough to identify the page.
213
     */
214
    protected $_subpage = '';
215
 
216
    /**
217
     * @var string Set a different path to use for the 'Documentation for this page' link.
218
     * By default, it uses the path of the file for instance mod/quiz/attempt.
219
     */
220
    protected $_docspath = null;
221
 
222
    /**
223
     * @var string A legacy class that will be added to the body tag
224
     */
225
    protected $_legacyclass = null;
226
 
227
    /**
228
     * @var moodle_url The URL for this page. This is mandatory and must be set
229
     * before output is started.
230
     */
231
    protected $_url = null;
232
 
233
    /**
234
     * @var array An array of links to alternative versions of this page.
235
     * Primarily used for RSS versions of the current page.
236
     */
237
    protected $_alternateversions = array();
238
 
239
    /**
240
     * @var block_manager The blocks manager for this page. It is responsible for
241
     * the blocks and there content on this page.
242
     */
243
    protected $_blocks = null;
244
 
245
    /**
246
     * @var page_requirements_manager Page requirements manager. It is responsible
247
     * for all JavaScript and CSS resources required by this page.
248
     */
249
    protected $_requires = null;
250
 
251
    /** @var page_requirements_manager Saves the requirement manager object used before switching to to fragments one. */
252
    protected $savedrequires = null;
253
 
254
    /**
255
     * @var string The capability required by the user in order to edit blocks
256
     * and block settings on this page.
257
     */
258
    protected $_blockseditingcap = 'moodle/site:manageblocks';
259
 
260
    /**
261
     * @var bool An internal flag to record when block actions have been processed.
262
     * Remember block actions occur on the current URL and it is important that
263
     * even they are never executed more than once.
264
     */
265
    protected $_block_actions_done = false;
266
 
267
    /**
268
     * @var array An array of any other capabilities the current user must have
269
     * in order to editing the page and/or its content (not just blocks).
270
     */
271
    protected $_othereditingcaps = array();
272
 
273
    /**
274
     * @var bool Sets whether this page should be cached by the browser or not.
275
     * If it is set to true (default) the page is served with caching headers.
276
     */
277
    protected $_cacheable = true;
278
 
279
    /**
280
     * @var string Can be set to the ID of an element on the page, if done that
281
     * element receives focus when the page loads.
282
     */
283
    protected $_focuscontrol = '';
284
 
285
    /**
286
     * @var string HTML to go where the turn on editing button is located. This
287
     * is nearly a legacy item and not used very often any more.
288
     */
289
    protected $_button = '';
290
 
291
    /**
292
     * @var theme_config The theme to use with this page. This has to be properly
293
     * initialised via {@link moodle_page::initialise_theme_and_output()} which
294
     * happens magically before any operation that requires it.
295
     */
296
    protected $_theme = null;
297
 
298
    /**
299
     * @var global_navigation Contains the global navigation structure.
300
     */
301
    protected $_navigation = null;
302
 
303
    /**
304
     * @var settings_navigation Contains the settings navigation structure.
305
     */
306
    protected $_settingsnav = null;
307
 
308
    /**
309
     * @var flat_navigation Contains a list of nav nodes, most closely related to the current page.
310
     */
311
    protected $_flatnav = null;
312
 
313
    /**
314
     * @var secondary Contains the nav nodes that will appear
315
     * in the secondary navigation.
316
     */
317
    protected $_secondarynav = null;
318
 
319
    /**
320
     * @var primary Contains the nav nodes that will appear
321
     * in the primary navigation.
322
     */
323
    protected $_primarynav = null;
324
 
325
    /**
326
     * @var primaryoutput Contains the combined nav nodes that will appear
327
     * in the primary navigation. Includes - primarynav, langmenu, usermenu
328
     */
329
    protected $_primarynavcombined = null;
330
 
331
    /**
332
     * @var navbar Contains the navbar structure.
333
     */
334
    protected $_navbar = null;
335
 
336
    /**
337
     * @var string The menu (or actions) to display in the heading.
338
     */
339
    protected $_headingmenu = null;
340
 
341
    /**
342
     * @var array stack trace. Then the theme is initialised, we save the stack
343
     * trace, for use in error messages.
344
     */
345
    protected $_wherethemewasinitialised = null;
346
 
347
    /**
348
     * @var xhtml_container_stack Tracks XHTML tags on this page that have been
349
     * opened but not closed.
350
     */
351
    protected $_opencontainers;
352
 
353
    /**
354
     * @var int Sets the page to refresh after a given delay (in seconds) using
355
     * meta refresh in {@link standard_head_html()} in outputlib.php
356
     * If set to null(default) the page is not refreshed
357
     */
358
    protected $_periodicrefreshdelay = null;
359
 
360
    /**
361
     * @var array Associative array of browser shortnames (as used by check_browser_version)
362
     * and their minimum required versions
363
     */
364
    protected $_legacybrowsers = array('MSIE' => 6.0);
365
 
366
    /**
367
     * @var string Is set to the name of the device type in use.
368
     * This will we worked out when it is first used.
369
     */
370
    protected $_devicetypeinuse = null;
371
 
372
    /**
373
     * @var bool Used to determine if HTTPS should be required for login.
374
     */
375
    protected $_https_login_required = false;
376
 
377
    /**
378
     * @var bool Determines if popup notifications allowed on this page.
379
     * Code such as the quiz module disables popup notifications in situations
380
     * such as upgrading or completing a quiz.
381
     */
382
    protected $_popup_notification_allowed = true;
383
 
384
    /**
385
     * @var bool Is the settings menu being forced to display on this page (activities / resources only).
386
     * This is only used by themes that use the settings menu.
387
     */
388
    protected $_forcesettingsmenu = false;
389
 
390
    /**
391
     * @var array Array of header actions HTML to add to the page header actions menu.
392
     */
393
    protected $_headeractions = [];
394
 
395
    /**
396
     * @var bool Should the region main settings menu be rendered in the header.
397
     */
398
    protected $_regionmainsettingsinheader = false;
399
 
400
    /**
401
     * @var bool Should the secondary menu be rendered.
402
     */
403
    protected $_hassecondarynavigation = true;
404
 
405
    /**
406
     * @var bool Should the secondary menu be rendered as a tablist as opposed to a menubar.
407
     */
408
    protected $_hastablistsecondarynavigation = false;
409
 
410
    /**
411
     * @var string the key of the secondary node to be activated.
412
     */
413
    protected $_activekeysecondary = null;
414
 
415
    /**
416
     * @var string the key of the primary node to be activated.
417
     */
418
    protected $_activenodeprimary = null;
419
 
420
    /**
421
     * @var activity_header The activity header for the page.
422
     */
423
    protected $_activityheader;
424
 
425
    /**
426
     * @var bool The value of displaying the navigation overflow.
427
     */
428
    protected $_navigationoverflow = true;
429
 
430
    /**
431
     * @var bool Whether to override/remove all editing capabilities for blocks on the page.
432
     */
433
    protected $_forcelockallblocks = false;
434
 
435
    /**
436
     * @var bool Indicates whether the course index drawer should be shown.
437
     */
438
    protected bool $_showcourseindex = true;
439
 
440
    /**
441
     * Force the settings menu to be displayed on this page. This will only force the
442
     * settings menu on an activity / resource page that is being displayed on a theme that
443
     * uses a settings menu.
444
     *
445
     * @param bool $forced default of true, can be sent false to turn off the force.
446
     */
447
    public function force_settings_menu($forced = true) {
448
        $this->_forcesettingsmenu = $forced;
449
    }
450
 
451
    /**
452
     * Check to see if the settings menu is forced to display on this activity / resource page.
453
     * This only applies to themes that use the settings menu.
454
     *
455
     * @return bool True if the settings menu is forced to display.
456
     */
457
    public function is_settings_menu_forced() {
458
        return $this->_forcesettingsmenu;
459
    }
460
 
461
    // Magic getter methods =============================================================
462
    // Due to the __get magic below, you normally do not call these as $PAGE->magic_get_x
463
    // methods, but instead use the $PAGE->x syntax.
464
 
465
    /**
466
     * Please do not call this method directly, use the ->state syntax. {@link moodle_page::__get()}.
467
     * @return integer one of the STATE_XXX constants. You should not normally need
468
     * to use this in your code. It is intended for internal use by this class
469
     * and its friends like print_header, to check that everything is working as
470
     * expected. Also accessible as $PAGE->state.
471
     */
472
    protected function magic_get_state() {
473
        return $this->_state;
474
    }
475
 
476
    /**
477
     * Please do not call this method directly, use the ->headerprinted syntax. {@link moodle_page::__get()}.
478
     * @return bool has the header already been printed?
479
     */
480
    protected function magic_get_headerprinted() {
481
        return $this->_state >= self::STATE_IN_BODY;
482
    }
483
 
484
    /**
485
     * Please do not call this method directly, use the ->course syntax. {@link moodle_page::__get()}.
486
     * @return stdClass the current course that we are inside - a row from the
487
     * course table. (Also available as $COURSE global.) If we are not inside
488
     * an actual course, this will be the site course.
489
     */
490
    protected function magic_get_course() {
491
        global $SITE;
492
        if (is_null($this->_course)) {
493
            return $SITE;
494
        }
495
        return $this->_course;
496
    }
497
 
498
    /**
499
     * Please do not call this method directly, use the ->cm syntax. {@link moodle_page::__get()}.
500
     * @return cm_info the course_module that this page belongs to. Will be null
501
     * if this page is not within a module. This is a full cm object, as loaded
502
     * by get_coursemodule_from_id or get_coursemodule_from_instance,
503
     * so the extra modname and name fields are present.
504
     */
505
    protected function magic_get_cm() {
506
        return $this->_cm;
507
    }
508
 
509
    /**
510
     * Please do not call this method directly, use the ->activityrecord syntax. {@link moodle_page::__get()}.
511
     * @return stdClass the row from the activities own database table (for example
512
     * the forum or quiz table) that this page belongs to. Will be null
513
     * if this page is not within a module.
514
     */
515
    protected function magic_get_activityrecord() {
516
        if (is_null($this->_module) && !is_null($this->_cm)) {
517
            $this->load_activity_record();
518
        }
519
        return $this->_module;
520
    }
521
 
522
    /**
523
     * Please do not call this method directly, use the ->activityname syntax. {@link moodle_page::__get()}.
524
     * @return string the The type of activity we are in, for example 'forum' or 'quiz'.
525
     * Will be null if this page is not within a module.
526
     */
527
    protected function magic_get_activityname() {
528
        if (is_null($this->_cm)) {
529
            return null;
530
        }
531
        return $this->_cm->modname;
532
    }
533
 
534
    /**
535
     * Please do not call this method directly, use the ->category syntax. {@link moodle_page::__get()}.
536
     * @return stdClass|null the category that the page course belongs to. If there isn't one
537
     * (that is, if this is the front page course) returns null.
538
     */
539
    protected function magic_get_category() {
540
        $this->ensure_category_loaded();
541
        if (!empty($this->_categories)) {
542
            return reset($this->_categories);
543
        } else {
544
            return null;
545
        }
546
    }
547
 
548
    /**
549
     * Please do not call this method directly, use the ->categories syntax. {@link moodle_page::__get()}.
550
     * @return array an array of all the categories the page course belongs to,
551
     * starting with the immediately containing category, and working out to
552
     * the top-level category. This may be the empty array if we are in the
553
     * front page course.
554
     */
555
    protected function magic_get_categories() {
556
        $this->ensure_categories_loaded();
557
        return $this->_categories;
558
    }
559
 
560
    /**
561
     * Please do not call this method directly, use the ->context syntax. {@link moodle_page::__get()}.
562
     * @return context the main context to which this page belongs.
563
     */
564
    protected function magic_get_context() {
565
        global $CFG;
566
        if (is_null($this->_context)) {
567
            if (CLI_SCRIPT or NO_MOODLE_COOKIES) {
568
                // Cli scripts work in system context, do not annoy devs with debug info.
569
                // Very few scripts do not use cookies, we can safely use system as default context there.
570
            } else if (AJAX_SCRIPT && $CFG->debugdeveloper) {
571
                // Throw exception inside AJAX script in developer mode, otherwise the debugging message may be missed.
572
                throw new coding_exception('$PAGE->context was not set. You may have forgotten '
573
                    .'to call require_login() or $PAGE->set_context()');
574
            } else {
575
                debugging('Coding problem: $PAGE->context was not set. You may have forgotten '
576
                    .'to call require_login() or $PAGE->set_context(). The page may not display '
577
                    .'correctly as a result');
578
            }
579
            $this->_context = context_system::instance();
580
        }
581
        return $this->_context;
582
    }
583
 
584
    /**
585
     * Please do not call this method directly, use the ->pagetype syntax. {@link moodle_page::__get()}.
586
     * @return string e.g. 'my-index' or 'mod-quiz-attempt'.
587
     */
588
    protected function magic_get_pagetype() {
589
        global $CFG;
590
        if (is_null($this->_pagetype) || isset($CFG->pagepath)) {
591
            $this->initialise_default_pagetype();
592
        }
593
        return $this->_pagetype;
594
    }
595
 
596
    /**
597
     * Please do not call this method directly, use the ->pagetype syntax. {@link moodle_page::__get()}.
598
     * @return string The id to use on the body tag, uses {@link magic_get_pagetype()}.
599
     */
600
    protected function magic_get_bodyid() {
601
        return 'page-'.$this->pagetype;
602
    }
603
 
604
    /**
605
     * Please do not call this method directly, use the ->pagelayout syntax. {@link moodle_page::__get()}.
606
     * @return string the general type of page this is. For example 'standard', 'popup', 'home'.
607
     *      Allows the theme to display things differently, if it wishes to.
608
     */
609
    protected function magic_get_pagelayout() {
610
        return $this->_pagelayout;
611
    }
612
 
613
    /**
614
     * Please do not call this method directly, use the ->layout_options syntax. {@link moodle_page::__get()}.
615
     * @return array returns arrays with options for layout file
616
     */
617
    protected function magic_get_layout_options() {
618
        if (!is_array($this->_layout_options)) {
1441 ariadna 619
            $this->_layout_options = $this->theme->pagelayout_options($this->pagelayout);
1 efrain 620
        }
621
        return $this->_layout_options;
622
    }
623
 
624
    /**
625
     * Please do not call this method directly, use the ->subpage syntax. {@link moodle_page::__get()}.
626
     * @return string The subpage identifier, if any.
627
     */
628
    protected function magic_get_subpage() {
629
        return $this->_subpage;
630
    }
631
 
632
    /**
633
     * Please do not call this method directly, use the ->bodyclasses syntax. {@link moodle_page::__get()}.
634
     * @return string the class names to put on the body element in the HTML.
635
     */
636
    protected function magic_get_bodyclasses() {
637
        return implode(' ', array_keys($this->_bodyclasses));
638
    }
639
 
640
    /**
641
     * Please do not call this method directly, use the ->title syntax. {@link moodle_page::__get()}.
642
     * @return string the title that should go in the <head> section of the HTML of this page.
643
     */
644
    protected function magic_get_title() {
645
        return $this->_title;
646
    }
647
 
648
    /**
649
     * Please do not call this method directly, use the ->heading syntax. {@link moodle_page::__get()}.
650
     * @return string the main heading that should be displayed at the top of the <body>.
651
     */
652
    protected function magic_get_heading() {
653
        return $this->_heading;
654
    }
655
 
656
    /**
657
     * Please do not call this method directly, use the ->heading syntax. {@link moodle_page::__get()}.
658
     * @return string The menu (or actions) to display in the heading
659
     */
660
    protected function magic_get_headingmenu() {
661
        return $this->_headingmenu;
662
    }
663
 
664
    /**
665
     * Please do not call this method directly, use the ->docspath syntax. {@link moodle_page::__get()}.
666
     * @return string the path to the Documentation for this page.
667
     */
668
    protected function magic_get_docspath() {
669
        if (is_string($this->_docspath)) {
670
            return $this->_docspath;
671
        } else {
672
            return str_replace('-', '/', $this->pagetype);
673
        }
674
    }
675
 
676
    /**
677
     * Please do not call this method directly, use the ->url syntax. {@link moodle_page::__get()}.
678
     * @return moodle_url the clean URL required to load the current page. (You
679
     * should normally use this in preference to $ME or $FULLME.)
680
     */
681
    protected function magic_get_url() {
682
        global $FULLME;
683
        if (is_null($this->_url)) {
684
            debugging('This page did not call $PAGE->set_url(...). Using '.s($FULLME), DEBUG_DEVELOPER);
685
            $this->_url = new moodle_url($FULLME);
686
            // Make sure the guessed URL cannot lead to dangerous redirects.
687
            $this->_url->remove_params('sesskey');
688
        }
689
        return new moodle_url($this->_url); // Return a clone for safety.
690
    }
691
 
692
    /**
693
     * The list of alternate versions of this page.
694
     * @return array mime type => object with ->url and ->title.
695
     */
696
    protected function magic_get_alternateversions() {
697
        return $this->_alternateversions;
698
    }
699
 
700
    /**
701
     * Please do not call this method directly, use the ->blocks syntax. {@link moodle_page::__get()}.
702
     * @return block_manager the blocks manager object for this page.
703
     */
704
    protected function magic_get_blocks() {
705
        global $CFG;
706
        if (is_null($this->_blocks)) {
707
            if (!empty($CFG->blockmanagerclass)) {
708
                if (!empty($CFG->blockmanagerclassfile)) {
709
                    require_once($CFG->blockmanagerclassfile);
710
                }
711
                $classname = $CFG->blockmanagerclass;
712
            } else {
713
                $classname = 'block_manager';
714
            }
715
            $this->_blocks = new $classname($this);
716
        }
717
        return $this->_blocks;
718
    }
719
 
720
    /**
721
     * Please do not call this method directly, use the ->requires syntax. {@link moodle_page::__get()}.
722
     * @return page_requirements_manager tracks the JavaScript, CSS files, etc. required by this page.
723
     */
724
    protected function magic_get_requires() {
725
        if (is_null($this->_requires)) {
726
            $this->_requires = new page_requirements_manager();
727
        }
728
        return $this->_requires;
729
    }
730
 
731
    /**
732
     * Please do not call this method directly, use the ->cacheable syntax. {@link moodle_page::__get()}.
733
     * @return bool can this page be cached by the user's browser.
734
     */
735
    protected function magic_get_cacheable() {
736
        return $this->_cacheable;
737
    }
738
 
739
    /**
740
     * Please do not call this method directly, use the ->focuscontrol syntax. {@link moodle_page::__get()}.
741
     * @return string the id of the HTML element to be focused when the page has loaded.
742
     */
743
    protected function magic_get_focuscontrol() {
744
        return $this->_focuscontrol;
745
    }
746
 
747
    /**
748
     * Please do not call this method directly, use the ->button syntax. {@link moodle_page::__get()}.
749
     * @return string the HTML to go where the Turn editing on button normally goes.
750
     */
751
    protected function magic_get_button() {
752
        return $this->_button;
753
    }
754
 
755
    /**
756
     * Please do not call this method directly, use the ->theme syntax. {@link moodle_page::__get()}.
757
     * @return theme_config the initialised theme for this page.
758
     */
759
    protected function magic_get_theme() {
760
        if (is_null($this->_theme)) {
761
            $this->initialise_theme_and_output();
762
        }
763
        return $this->_theme;
764
    }
765
 
766
    /**
767
     * Returns an array of minipulations or false if there are none to make.
768
     *
769
     * @since Moodle 2.5.1 2.6
770
     * @return bool|array
771
     */
772
    protected function magic_get_blockmanipulations() {
773
        if (!right_to_left()) {
774
            return false;
775
        }
776
        if (is_null($this->_theme)) {
777
            $this->initialise_theme_and_output();
778
        }
779
        return $this->_theme->blockrtlmanipulations;
780
    }
781
 
782
    /**
783
     * Please do not call this method directly, use the ->devicetypeinuse syntax. {@link moodle_page::__get()}.
784
     * @return string The device type being used.
785
     */
786
    protected function magic_get_devicetypeinuse() {
787
        if (empty($this->_devicetypeinuse)) {
788
            $this->_devicetypeinuse = core_useragent::get_user_device_type();
789
        }
790
        return $this->_devicetypeinuse;
791
    }
792
 
793
    /**
794
     * Please do not call this method directly use the ->periodicrefreshdelay syntax
795
     * {@link moodle_page::__get()}
796
     * @return int The periodic refresh delay to use with meta refresh
797
     */
798
    protected function magic_get_periodicrefreshdelay() {
799
        return $this->_periodicrefreshdelay;
800
    }
801
 
802
    /**
803
     * Please do not call this method directly use the ->opencontainers syntax. {@link moodle_page::__get()}
804
     * @return xhtml_container_stack tracks XHTML tags on this page that have been opened but not closed.
805
     *      mainly for internal use by the rendering code.
806
     */
807
    protected function magic_get_opencontainers() {
808
        if (is_null($this->_opencontainers)) {
809
            $this->_opencontainers = new xhtml_container_stack();
810
        }
811
        return $this->_opencontainers;
812
    }
813
 
814
    /**
815
     * Return the navigation object
816
     * @return global_navigation
817
     */
818
    protected function magic_get_navigation() {
819
        if ($this->_navigation === null) {
820
            $this->_navigation = new global_navigation($this);
821
        }
822
        return $this->_navigation;
823
    }
824
 
825
    /**
826
     * Return a navbar object
827
     * @return navbar
828
     */
829
    protected function magic_get_navbar() {
830
        if ($this->_navbar === null) {
831
            $this->_navbar = new navbar($this);
832
        }
833
        return $this->_navbar;
834
    }
835
 
836
    /**
837
     * Returns the settings navigation object
838
     * @return settings_navigation
839
     */
840
    protected function magic_get_settingsnav() {
841
        if ($this->_settingsnav === null) {
842
            $this->_settingsnav = new settings_navigation($this);
843
            $this->_settingsnav->initialise();
844
        }
845
        return $this->_settingsnav;
846
    }
847
 
848
    /**
849
     * Returns the flat navigation object
850
     * @return flat_navigation
851
     */
852
    protected function magic_get_flatnav() {
853
        if ($this->_flatnav === null) {
854
            $this->_flatnav = new flat_navigation($this);
855
            $this->_flatnav->initialise();
856
        }
857
        return $this->_flatnav;
858
    }
859
 
860
    /**
861
     * Returns the activity header object
862
     * @return activity_header
863
     */
864
    protected function magic_get_activityheader(): activity_header {
865
        global $USER;
866
        if ($this->_activityheader === null) {
867
            $class = activity_header::class;
868
            // Try and load a custom class first.
869
            if (class_exists("mod_{$this->activityname}\\output\\activity_header")) {
870
                $class = "mod_{$this->activityname}\\output\\activity_header";
871
            }
872
 
873
            $this->_activityheader = new $class($this, $USER);
874
        }
875
        return $this->_activityheader;
876
    }
877
 
878
    /**
879
     * Returns the secondary navigation object
880
     *
881
     * @return secondary
882
     */
883
    protected function magic_get_secondarynav() {
884
        if ($this->_secondarynav === null) {
885
            $class = 'core\navigation\views\secondary';
1441 ariadna 886
 
887
            // Check whether activity defines its own secondary navigation.
1 efrain 888
            if (class_exists("mod_{$this->activityname}\\navigation\\views\\secondary")) {
889
                $class = "mod_{$this->activityname}\\navigation\\views\\secondary";
890
            }
891
 
892
            $this->_secondarynav = new $class($this);
893
            $this->_secondarynav->initialise();
894
        }
895
        return $this->_secondarynav;
896
    }
897
 
898
    /**
899
     * Returns the primary navigation object
900
     * @return primary
901
     */
902
    protected function magic_get_primarynav() {
903
        if ($this->_primarynav === null) {
904
            $this->_primarynav = new primary($this);
905
            $this->_primarynav->initialise();
906
        }
907
        return $this->_primarynav;
908
    }
909
 
910
    /**
911
     * Returns the primary navigation object
912
     * @return primaryoutput
913
     */
914
    protected function magic_get_primarynavcombined() {
915
        if ($this->_primarynavcombined === null) {
916
            $this->_primarynavcombined = new primaryoutput($this);
917
        }
918
        return $this->_primarynavcombined;
919
    }
920
 
921
    /**
922
     * Returns request IP address.
923
     *
924
     * @return string IP address or null if unknown
925
     */
926
    protected function magic_get_requestip() {
927
        return getremoteaddr(null);
928
    }
929
 
930
    /**
931
     * Returns the origin of current request.
932
     *
933
     * Note: constants are not required because we need to use these values in logging and reports.
934
     *
935
     * @return string 'web', 'ws', 'cli', 'restore', etc.
936
     */
937
    protected function magic_get_requestorigin() {
938
        if (class_exists('restore_controller', false) && restore_controller::is_executing()) {
939
            return 'restore';
940
        }
941
 
942
        if (WS_SERVER) {
943
            return 'ws';
944
        }
945
 
946
        if (CLI_SCRIPT) {
947
            return 'cli';
948
        }
949
 
950
        return 'web';
951
    }
952
 
953
    /**
954
     * PHP overloading magic to make the $PAGE->course syntax work by redirecting
955
     * it to the corresponding $PAGE->magic_get_course() method if there is one, and
956
     * throwing an exception if not.
957
     *
958
     * @param string $name property name
959
     * @return mixed
960
     * @throws coding_exception
961
     */
962
    public function __get($name) {
963
        $getmethod = 'magic_get_' . $name;
964
        if (method_exists($this, $getmethod)) {
965
            return $this->$getmethod();
966
        } else {
967
            throw new coding_exception('Unknown property ' . $name . ' of $PAGE.');
968
        }
969
    }
970
 
971
    /**
972
     * PHP overloading magic to catch obvious coding errors.
973
     *
974
     * This method has been created to catch obvious coding errors where the
975
     * developer has tried to set a page property using $PAGE->key = $value.
976
     * In the moodle_page class all properties must be set using the appropriate
977
     * $PAGE->set_something($value) method.
978
     *
979
     * @param string $name property name
980
     * @param mixed $value Value
981
     * @return void Throws exception if field not defined in page class
982
     * @throws coding_exception
983
     */
984
    public function __set($name, $value) {
985
        if (method_exists($this, 'set_' . $name)) {
986
            throw new coding_exception('Invalid attempt to modify page object', "Use \$PAGE->set_$name() instead.");
987
        } else {
988
            throw new coding_exception('Invalid attempt to modify page object', "Unknown property $name");
989
        }
990
    }
991
 
992
    // Other information getting methods ==========================================.
993
 
994
    /**
995
     * Returns instance of page renderer
996
     *
997
     * @param string $component name such as 'core', 'mod_forum' or 'qtype_multichoice'.
998
     * @param string $subtype optional subtype such as 'news' resulting to 'mod_forum_news'
999
     * @param string $target one of rendering target constants
1000
     * @return renderer_base
1001
     */
1002
    public function get_renderer($component, $subtype = null, $target = null) {
1003
        if ($this->pagelayout === 'maintenance') {
1004
            // If the page is using the maintenance layout then we're going to force target to maintenance.
1005
            // This leads to a special core renderer that is designed to block access to API's that are likely unavailable for this
1006
            // page layout.
1007
            $target = RENDERER_TARGET_MAINTENANCE;
1008
        }
1009
        return $this->magic_get_theme()->get_renderer($this, $component, $subtype, $target);
1010
    }
1011
 
1012
    /**
1013
     * Checks to see if there are any items on the navbar object
1014
     *
1015
     * @return bool true if there are, false if not
1016
     */
1017
    public function has_navbar() {
1018
        if ($this->_navbar === null) {
1019
            $this->_navbar = new navbar($this);
1020
        }
1021
        return $this->_navbar->has_items();
1022
    }
1023
 
1024
    /**
1025
     * Switches from the regular requirements manager to the fragment requirements manager to
1026
     * capture all necessary JavaScript to display a chunk of HTML such as an mform. This is for use
1027
     * by the get_fragment() web service and not for use elsewhere.
1028
     */
1029
    public function start_collecting_javascript_requirements() {
1030
        // Check that the requirements manager has not already been switched.
1031
        if (get_class($this->_requires) == 'fragment_requirements_manager') {
1032
            throw new coding_exception('JavaScript collection has already been started.');
1033
        }
1034
        // The header needs to have been called to flush out the generic JavaScript for the page. This allows only
1035
        // JavaScript for the fragment to be collected. _wherethemewasinitialised is set when header() is called.
1036
        if (!empty($this->_wherethemewasinitialised)) {
1037
            // Change the current requirements manager over to the fragment manager to capture JS.
1038
            $this->savedrequires = $this->_requires;
1039
            $this->_requires = new fragment_requirements_manager();
1040
        } else {
1041
            throw new coding_exception('$OUTPUT->header() needs to be called before collecting JavaScript requirements.');
1042
        }
1043
    }
1044
 
1045
    /**
1046
     * Switches back from collecting fragment JS requirement to the original requirement manager
1047
     */
1048
    public function end_collecting_javascript_requirements() {
1049
        if ($this->savedrequires === null) {
1050
            throw new coding_exception('JavaScript collection has not been started.');
1051
        }
1052
        $this->_requires = $this->savedrequires;
1053
        $this->savedrequires = null;
1054
    }
1055
 
1056
    /**
1057
     * Should the current user see this page in editing mode.
1058
     * That is, are they allowed to edit this page, and are they currently in
1059
     * editing mode.
1060
     * @return bool
1061
     */
1062
    public function user_is_editing() {
1063
        global $USER;
1064
        return !empty($USER->editing) && $this->user_allowed_editing();
1065
    }
1066
 
1067
    /**
1068
     * Does the user have permission to edit blocks on this page.
1069
     * Can be forced to false by calling the force_lock_all_blocks() method.
1070
     *
1071
     * @return bool
1072
     */
1073
    public function user_can_edit_blocks() {
1074
        return $this->_forcelockallblocks ? false : has_capability($this->_blockseditingcap, $this->_context);
1075
    }
1076
 
1077
    /**
1078
     * Does the user have permission to see this page in editing mode.
1079
     * @return bool
1080
     */
1081
    public function user_allowed_editing() {
1082
        return has_any_capability($this->all_editing_caps(), $this->_context);
1083
    }
1084
 
1085
    /**
1086
     * Get a description of this page. Normally displayed in the footer in developer debug mode.
1087
     * @return string
1088
     */
1089
    public function debug_summary() {
1090
        $summary = '';
1091
        $summary .= 'General type: ' . $this->pagelayout . '. ';
1092
        if (!during_initial_install()) {
1093
            $summary .= 'Context ' . $this->context->get_context_name() . ' (context id ' . $this->_context->id . '). ';
1094
        }
1095
        $summary .= 'Page type ' . $this->pagetype .  '. ';
1096
        if ($this->subpage) {
1097
            $summary .= 'Sub-page ' . $this->subpage .  '. ';
1098
        }
1441 ariadna 1099
 
1100
        // Display deprecated icons in the console (if any).
1101
        $summary .= <<< EOF
1102
            <script type="text/javascript">
1103
            //<![CDATA[
1104
            document.querySelectorAll('.icon.deprecated').forEach((icon) => {
1105
                window.console.warn("Deprecated icon found: " + icon.className);
1106
            });
1107
            //]]>
1108
            </script>
1109
        EOF;
1110
 
1 efrain 1111
        return $summary;
1112
    }
1113
 
1114
    // Setter methods =============================================================.
1115
 
1116
    /**
1117
     * Set the state.
1118
     *
1119
     * The state must be one of that STATE_... constants, and the state is only allowed to advance one step at a time.
1120
     *
1121
     * @param int $state The new state.
1122
     * @throws coding_exception
1123
     */
1124
    public function set_state($state) {
1125
        if ($state != $this->_state + 1 || $state > self::STATE_DONE) {
1126
            throw new coding_exception('Invalid state passed to moodle_page::set_state. We are in state ' .
1127
                    $this->_state . ' and state ' . $state . ' was requested.');
1128
        }
1129
 
1130
        if ($state == self::STATE_PRINTING_HEADER) {
1131
            $this->starting_output();
1132
        }
1133
 
1134
        $this->_state = $state;
1135
    }
1136
 
1137
    /**
1138
     * Set the current course. This sets both $PAGE->course and $COURSE. It also
1139
     * sets the right theme and locale.
1140
     *
1141
     * Normally you don't need to call this function yourself, require_login will
1142
     * call it for you if you pass a $course to it. You can use this function
1143
     * on pages that do need to call require_login().
1144
     *
1145
     * Sets $PAGE->context to the course context, if it is not already set.
1146
     *
1147
     * @param stdClass $course the course to set as the global course.
1148
     * @throws coding_exception
1149
     */
1150
    public function set_course($course) {
1151
        global $COURSE, $PAGE, $CFG, $SITE;
1152
 
1153
        if (empty($course->id)) {
1154
            throw new coding_exception('$course passed to moodle_page::set_course does not look like a proper course object.');
1155
        }
1156
 
1157
        $this->ensure_theme_not_set();
1158
 
1159
        if (!empty($this->_course->id) && $this->_course->id != $course->id) {
1160
            $this->_categories = null;
1161
        }
1162
 
1163
        $this->_course = clone($course);
1164
 
1165
        if ($this === $PAGE) {
1166
            $COURSE = $this->_course;
1167
            moodle_setlocale();
1168
        }
1169
 
1170
        if (!$this->_context) {
1171
            $this->set_context(context_course::instance($this->_course->id));
1172
        }
1173
 
1174
        // Notify course format that this page is set for the course.
1175
        if ($this->_course->id != $SITE->id) {
1176
            require_once($CFG->dirroot.'/course/lib.php');
1177
            $courseformat = course_get_format($this->_course);
1178
            $this->add_body_class('format-'. $courseformat->get_format());
1179
            $courseformat->page_set_course($this);
1180
        } else {
1181
            $this->add_body_class('format-site');
1182
        }
1183
    }
1184
 
1185
    /**
1186
     * Set the main context to which this page belongs.
1187
     *
1188
     * @param ?context $context a context object. You normally get this with context_xxxx::instance().
1189
     */
1190
    public function set_context($context) {
1191
        if ($context === null) {
1192
            // Extremely ugly hack which sets context to some value in order to prevent warnings,
1193
            // use only for core error handling!!!!
1194
            if (!$this->_context) {
1195
                $this->_context = context_system::instance();
1196
            }
1197
            return;
1198
        }
1199
        // Ideally we should set context only once.
1200
        if (isset($this->_context) && $context->id !== $this->_context->id) {
1201
            $current = $this->_context->contextlevel;
1202
            if ($current == CONTEXT_SYSTEM or $current == CONTEXT_COURSE) {
1203
                // Hmm - not ideal, but it might produce too many warnings due to the design of require_login.
1204
            } else if ($current == CONTEXT_MODULE and ($parentcontext = $context->get_parent_context()) and
1205
                $this->_context->id == $parentcontext->id) {
1206
                // Hmm - most probably somebody did require_login() and after that set the block context.
1207
            } else {
1208
                // We do not want devs to do weird switching of context levels on the fly because we might have used
1209
                // the context already such as in text filter in page title.
1210
                debugging("Coding problem: unsupported modification of PAGE->context from {$current} to {$context->contextlevel}");
1211
            }
1212
        }
1213
 
1214
        $this->_context = $context;
1215
    }
1216
 
1217
    /**
1218
     * The course module that this page belongs to (if it does belong to one).
1219
     *
1220
     * @param stdClass|cm_info $cm a record from course_modules table or cm_info from get_fast_modinfo().
1221
     * @param stdClass $course
1222
     * @param stdClass $module
1223
     * @return void
1224
     * @throws coding_exception
1225
     */
1226
    public function set_cm($cm, $course = null, $module = null) {
1227
        global $DB, $CFG, $SITE;
1228
 
1229
        if (!isset($cm->id) || !isset($cm->course)) {
1230
            throw new coding_exception('Invalid $cm. It has to be instance of cm_info or record from the course_modules table.');
1231
        }
1232
 
1233
        if (!$this->_course || $this->_course->id != $cm->course) {
1234
            if (!$course) {
1235
                $course = $DB->get_record('course', array('id' => $cm->course), '*', MUST_EXIST);
1236
            }
1237
            if ($course->id != $cm->course) {
1238
                throw new coding_exception('The course you passed to $PAGE->set_cm does not correspond to the $cm.');
1239
            }
1240
            $this->set_course($course);
1241
        }
1242
 
1243
        // Make sure we have a $cm from get_fast_modinfo as this contains activity access details.
1244
        if (!($cm instanceof cm_info)) {
1245
            $modinfo = get_fast_modinfo($this->_course);
1246
            $cm = $modinfo->get_cm($cm->id);
1247
        }
1248
        $this->_cm = $cm;
1249
 
1250
        // Unfortunately the context setting is a mess.
1251
        // Let's try to work around some common block problems and show some debug messages.
1252
        if (empty($this->_context) or $this->_context->contextlevel != CONTEXT_BLOCK) {
1253
            $context = context_module::instance($cm->id);
1254
            $this->set_context($context);
1255
        }
1256
 
1257
        if ($module) {
1258
            $this->set_activity_record($module);
1259
        }
1260
 
1261
        // Notify course format that this page is set for the course module.
1262
        if ($this->_course->id != $SITE->id) {
1263
            require_once($CFG->dirroot.'/course/lib.php');
1264
            course_get_format($this->_course)->page_set_cm($this);
1265
        }
1266
    }
1267
 
1268
    /**
1269
     * Sets the activity record. This could be a row from the main table for a
1270
     * module. For instance if the current module (cm) is a forum this should be a row
1271
     * from the forum table.
1272
     *
1273
     * @param stdClass $module A row from the main database table for the module that this page belongs to.
1274
     * @throws coding_exception
1275
     */
1276
    public function set_activity_record($module) {
1277
        if (is_null($this->_cm)) {
1278
            throw new coding_exception('You cannot call $PAGE->set_activity_record until after $PAGE->cm has been set.');
1279
        }
1280
        if ($module->id != $this->_cm->instance || $module->course != $this->_course->id) {
1281
            throw new coding_exception('The activity record does not seem to correspond to the cm that has been set.');
1282
        }
1283
        $this->_module = $module;
1284
    }
1285
 
1286
    /**
1287
     * Sets the pagetype to use for this page.
1288
     *
1289
     * Normally you do not need to set this manually, it is automatically created
1290
     * from the script name. However, on some pages this is overridden.
1291
     * For example the page type for course/view.php includes the course format,
1292
     * for example 'course-view-weeks'. This gets used as the id attribute on
1293
     * <body> and also for determining which blocks are displayed.
1294
     *
1295
     * @param string $pagetype e.g. 'my-index' or 'mod-quiz-attempt'.
1296
     */
1297
    public function set_pagetype($pagetype) {
1298
        $this->_pagetype = $pagetype;
1299
    }
1300
 
1301
    /**
1302
     * Sets the layout to use for this page.
1303
     *
1304
     * The page layout determines how the page will be displayed, things such as
1305
     * block regions, content areas, etc are controlled by the layout.
1306
     * The theme in use for the page will determine that the layout contains.
1307
     *
1308
     * This properly defaults to 'base', so you only need to call this function if
1309
     * you want something different. The exact range of supported layouts is specified
1310
     * in the standard theme.
1311
     *
1312
     * For an idea of the common page layouts see
1313
     * {@link https://docs.moodle.org/dev/Themes_overview#Layouts}
1314
     * But please keep in mind that it may be (and normally is) out of date.
1315
     * The only place to find an accurate up-to-date list of the page layouts
1316
     * available for your version of Moodle is {@link theme/base/config.php}
1317
     *
1318
     * @param string $pagelayout the page layout this is. For example 'popup', 'home'.
1319
     */
1320
    public function set_pagelayout($pagelayout) {
1321
        global $SESSION;
1322
 
1323
        if (!empty($SESSION->forcepagelayout)) {
1324
            $this->_pagelayout = $SESSION->forcepagelayout;
1325
        } else {
1326
            // Uncomment this to debug theme pagelayout issues like missing blocks.
1327
            // if (!empty($this->_wherethemewasinitialised) && $pagelayout != $this->_pagelayout)
1328
            //     debugging('Page layout has already been set and cannot be changed.', DEBUG_DEVELOPER);
1329
            $this->_pagelayout = $pagelayout;
1330
        }
1331
    }
1332
 
1333
    /**
1334
     * If context->id and pagetype are not enough to uniquely identify this page,
1335
     * then you can set a subpage id as well. For example, the tags page sets
1336
     *
1337
     * @param string $subpage an arbitrary identifier that, along with context->id
1338
     *      and pagetype, uniquely identifies this page.
1339
     */
1340
    public function set_subpage($subpage) {
1341
        if (empty($subpage)) {
1342
            $this->_subpage = '';
1343
        } else {
1344
            $this->_subpage = $subpage;
1345
        }
1346
    }
1347
 
1348
    /**
1349
     * Force set secondary_nav. Useful in cases where we dealing with non course modules. e.g. blocks, tools.
1350
     * @param secondary $nav
1351
     */
1352
    public function set_secondarynav(secondary $nav) {
1353
        $this->_secondarynav = $nav;
1354
    }
1355
 
1356
    /**
1357
     * Adds a CSS class to the body tag of the page.
1358
     *
1359
     * @param string $class add this class name ot the class attribute on the body tag.
1360
     * @throws coding_exception
1361
     */
1362
    public function add_body_class($class) {
1363
        if ($this->_state > self::STATE_BEFORE_HEADER) {
1364
            throw new coding_exception('Cannot call moodle_page::add_body_class after output has been started.');
1365
        }
1366
        $this->_bodyclasses[$class] = 1;
1367
    }
1368
 
1369
    /**
1370
     * Adds an array of body classes to the body tag of this page.
1371
     *
1372
     * @param array $classes this utility method calls add_body_class for each array element.
1373
     */
1374
    public function add_body_classes($classes) {
1375
        foreach ($classes as $class) {
1376
            $this->add_body_class($class);
1377
        }
1378
    }
1379
 
1380
    /**
1381
     * Sets the title for the page.
1382
     *
1383
     * This is normally used within the title tag in the head of the page.
1384
     *
1385
     * Some tips for providing a meaningful page title:
1386
     * - The page title must be accurate and informative.
1387
     * - If the page causes a change of context (e.g. a search functionality), it should describe the result or change of context
1388
     *   to the user.
1389
     * - It should be concise.
1390
     * - If possible, it should uniquely identify the page.
1391
     * - The most identifying information should come first. (e.g. Submit assignment | Assignment | Moodle)
1392
     *
1393
     * For more information, see
1394
     * {@link https://www.w3.org/WAI/WCAG21/Understanding/page-titled Understanding Success Criterion 2.4.2: Page Titled}
1395
     *
1396
     * @param string $title the title that should go in the <head> section of the HTML of this page.
1397
     * @param bool $appendsitename Appends site name at the end of the given title. It is encouraged to append the site name as this
1398
     *                              especially helps with accessibility. If it's necessary to override this, please keep in mind
1399
     *                              to ensure that the title provides a concise summary of the page being displayed.
1400
     */
1401
    public function set_title($title, bool $appendsitename = true) {
1402
        global $CFG;
1403
 
1404
        $title = format_string($title);
1405
        $title = strip_tags($title);
1406
        $title = str_replace('"', '&quot;', $title);
1407
 
1408
        if ($appendsitename) {
1409
            // Append the site name at the end of the page title.
1410
            $sitenamedisplay = 'shortname';
1411
            if (!empty($CFG->sitenameintitle)) {
1412
                $sitenamedisplay = $CFG->sitenameintitle;
1413
            }
1414
            $site = get_site();
1415
            if (empty(trim($site->{$sitenamedisplay} ?? ''))) {
1416
                // If for some reason the site name is not yet set, fall back to 'Moodle'.
1417
                $title .= self::TITLE_SEPARATOR . 'Moodle';
1418
            } else {
1419
                $title .= self::TITLE_SEPARATOR . format_string($site->{$sitenamedisplay});
1420
            }
1421
        }
1422
 
1423
        $this->_title = $title;
1424
    }
1425
 
1426
    /**
1427
     * Sets the heading to use for the page.
1428
     * This is normally used as the main heading at the top of the content.
1429
     *
1430
     * @param string $heading the main heading that should be displayed at the top of the <body>.
1431
     * @param bool $applyformatting apply format_string() - by default true.
1432
     * @param bool $clean whether the heading should be cleaned or not when no formatting is applied - by default true.
1433
     */
1434
    public function set_heading($heading, bool $applyformatting = true, bool $clean = true) {
1435
        $this->_heading = $applyformatting ? format_string($heading) : ($clean ? clean_text($heading) : $heading);
1436
    }
1437
 
1438
    /**
1439
     * Sets some HTML to use next to the heading {@link moodle_page::set_heading()}
1440
     *
1441
     * @param string $menu The menu/content to show in the heading
1442
     */
1443
    public function set_headingmenu($menu) {
1444
        $this->_headingmenu = $menu;
1445
    }
1446
 
1447
    /**
1448
     * Set the course category this page belongs to manually.
1449
     *
1450
     * This automatically sets $PAGE->course to be the site course. You cannot
1451
     * use this method if you have already set $PAGE->course - in that case,
1452
     * the category must be the one that the course belongs to. This also
1453
     * automatically sets the page context to the category context.
1454
     *
1455
     * @param int $categoryid The id of the category to set.
1456
     * @throws coding_exception
1457
     */
1458
    public function set_category_by_id($categoryid) {
1459
        global $SITE;
1460
        if (!is_null($this->_course)) {
1461
            throw new coding_exception('Course has already been set. You cannot change the category now.');
1462
        }
1463
        if (is_array($this->_categories)) {
1464
            throw new coding_exception('Course category has already been set. You cannot to change it now.');
1465
        }
1466
        $this->ensure_theme_not_set();
1467
        $this->set_course($SITE);
1468
        $this->load_category($categoryid);
1469
        $this->set_context(context_coursecat::instance($categoryid));
1470
    }
1471
 
1472
    /**
1473
     * Set a different path to use for the 'Documentation for this page' link.
1474
     *
1475
     * By default, it uses the pagetype, which is normally the same as the
1476
     * script name. So, for example, for mod/quiz/attempt.php, pagetype is
1477
     * mod-quiz-attempt, and so docspath is mod/quiz/attempt.
1478
     *
1479
     * @param string $path the path to use at the end of the moodle docs URL.
1480
     */
1481
    public function set_docs_path($path) {
1482
        $this->_docspath = $path;
1483
    }
1484
 
1485
    /**
1486
     * You should call this method from every page to set the URL that should be used to return to this page.
1487
     *
1488
     * Used, for example, by the blocks editing UI to know where to return the
1489
     * user after an action.
1490
     * For example, course/view.php does:
1491
     *      $id = optional_param('id', 0, PARAM_INT);
1492
     *      $PAGE->set_url('/course/view.php', array('id' => $id));
1493
     *
1494
     * @param moodle_url|string $url URL relative to $CFG->wwwroot or {@link moodle_url} instance
1495
     * @param array $params parameters to add to the URL
1496
     * @throws coding_exception
1497
     */
1441 ariadna 1498
    public function set_url($url, ?array $params = null) {
1 efrain 1499
        global $CFG;
1500
 
1501
        if (is_string($url) && strpos($url, 'http') !== 0) {
1502
            if (strpos($url, '/') === 0) {
1503
                // Add the wwwroot to the relative url.
1504
                $url = $CFG->wwwroot . $url;
1505
            } else {
1506
                throw new coding_exception('Invalid parameter $url, has to be full url or in shortened form starting with /.');
1507
            }
1508
        }
1509
 
1510
        $this->_url = new moodle_url($url, $params);
1511
 
1512
        $fullurl = $this->_url->out_omit_querystring();
1513
        if (strpos($fullurl, "$CFG->wwwroot/") !== 0) {
1514
            debugging('Most probably incorrect set_page() url argument, it does not match the wwwroot!');
1515
        }
1516
        $shorturl = str_replace("$CFG->wwwroot/", '', $fullurl);
1517
 
1518
        if (is_null($this->_pagetype)) {
1519
            $this->initialise_default_pagetype($shorturl);
1520
        }
1521
    }
1522
 
1523
    /**
1524
     * Make sure page URL does not contain the given URL parameter.
1525
     *
1526
     * This should not be necessary if the script has called set_url properly.
1527
     * However, in some situations like the block editing actions; when the URL
1528
     * has been guessed, it will contain dangerous block-related actions.
1529
     * Therefore, the blocks code calls this function to clean up such parameters
1530
     * before doing any redirect.
1531
     *
1532
     * @param string $param the name of the parameter to make sure is not in the
1533
     * page URL.
1534
     */
1535
    public function ensure_param_not_in_url($param) {
1536
        $this->_url->remove_params($param);
1537
    }
1538
 
1539
    /**
1540
     * Sets an alternative version of this page.
1541
     *
1542
     * There can be alternate versions of some pages (for example an RSS feed version).
1543
     * Call this method for each alternative version available.
1544
     * For each alternative version a link will be included in the <head> tag.
1545
     *
1546
     * @param string $title The title to give the alternate version.
1547
     * @param string|moodle_url $url The URL of the alternate version.
1548
     * @param string $mimetype The mime-type of the alternate version.
1549
     * @throws coding_exception
1550
     */
1551
    public function add_alternate_version($title, $url, $mimetype) {
1552
        if ($this->_state > self::STATE_BEFORE_HEADER) {
1553
            throw new coding_exception('Cannot call moodle_page::add_alternate_version after output has been started.');
1554
        }
1555
        $alt = new stdClass;
1556
        $alt->title = $title;
1557
        $alt->url = $url;
1558
        $this->_alternateversions[$mimetype] = $alt;
1559
    }
1560
 
1561
    /**
1562
     * Specify a form control should be focused when the page has loaded.
1563
     *
1564
     * @param string $controlid the id of the HTML element to be focused.
1565
     */
1566
    public function set_focuscontrol($controlid) {
1567
        $this->_focuscontrol = $controlid;
1568
    }
1569
 
1570
    /**
1571
     * Specify a fragment of HTML that goes where the 'Turn editing on' button normally goes.
1572
     *
1573
     * @param string $html the HTML to display there.
1574
     */
1575
    public function set_button($html) {
1576
        $this->_button = $html;
1577
    }
1578
 
1579
    /**
1580
     * Set the capability that allows users to edit blocks on this page.
1581
     *
1582
     * Normally the default of 'moodle/site:manageblocks' is used, but a few
1583
     * pages like the My Moodle page need to use a different capability
1584
     * like 'moodle/my:manageblocks'.
1585
     *
1586
     * @param string $capability a capability.
1587
     */
1588
    public function set_blocks_editing_capability($capability) {
1589
        $this->_blockseditingcap = $capability;
1590
    }
1591
 
1592
    /**
1593
     * Some pages let you turn editing on for reasons other than editing blocks.
1594
     * If that is the case, you can pass other capabilities that let the user
1595
     * edit this page here.
1596
     *
1597
     * @param string|array $capability either a capability, or an array of capabilities.
1598
     */
1599
    public function set_other_editing_capability($capability) {
1600
        if (is_array($capability)) {
1601
            $this->_othereditingcaps = array_unique($this->_othereditingcaps + $capability);
1602
        } else {
1603
            $this->_othereditingcaps[] = $capability;
1604
        }
1605
    }
1606
 
1607
    /**
1608
     * Sets whether the browser should cache this page or not.
1609
     *
1610
     * @param bool $cacheable can this page be cached by the user's browser.
1611
     */
1612
    public function set_cacheable($cacheable) {
1613
        $this->_cacheable = $cacheable;
1614
    }
1615
 
1616
    /**
1617
     * Sets the page to periodically refresh
1618
     *
1619
     * This function must be called before $OUTPUT->header has been called or
1620
     * a coding exception will be thrown.
1621
     *
1622
     * @param int $delay Sets the delay before refreshing the page, if set to null refresh is cancelled.
1623
     * @throws coding_exception
1624
     */
1625
    public function set_periodic_refresh_delay($delay = null) {
1626
        if ($this->_state > self::STATE_BEFORE_HEADER) {
1627
            throw new coding_exception('You cannot set a periodic refresh delay after the header has been printed');
1628
        }
1629
        if ($delay === null) {
1630
            $this->_periodicrefreshdelay = null;
1631
        } else if (is_int($delay)) {
1632
            $this->_periodicrefreshdelay = $delay;
1633
        }
1634
    }
1635
 
1636
    /**
1637
     * Force this page to use a particular theme.
1638
     *
1639
     * Please use this cautiously.
1640
     * It is only intended to be used by the themes selector admin page.
1641
     *
1642
     * @param string $themename the name of the theme to use.
1643
     */
1644
    public function force_theme($themename) {
1645
        $this->ensure_theme_not_set();
1646
        $this->_theme = theme_config::load($themename);
1647
    }
1648
 
1649
    /**
1650
     * Reload theme settings.
1651
     *
1652
     * This is used when we need to reset settings
1653
     * because they are now double cached in theme.
1654
     */
1655
    public function reload_theme() {
1656
        if (!is_null($this->_theme)) {
1657
            $this->_theme = theme_config::load($this->_theme->name);
1658
        }
1659
    }
1660
 
1661
    /**
1662
     * Remove access to editing/moving on all blocks on a page.
1663
     * This overrides any capabilities and is intended only for pages where no user (including admins) should be able to
1664
     * modify blocks on the page (eg My Courses).
1665
     *
1666
     * @return void
1667
     */
1668
    public function force_lock_all_blocks(): void {
1669
        $this->_forcelockallblocks = true;
1670
    }
1671
 
1672
    /**
1673
     * Allows to 'serialize' the edited page information and store it in the session cache
1674
     *
1675
     * Due to Moodle architectural decision and non-SPA approach, a lot of page setup is
1676
     * happening in the actual page php file, for example, setting course/cm/context,
1677
     * setting layout and pagetype, requiring capabilities, setting specific block editing
1678
     * capabilities.
1679
     *
1680
     * When storing this information in the session cache we can pass the pagehash (cache key)
1681
     * as an argument to web services in AJAX requests and retrieve all data associated with
1682
     * the page without actually executing PHP code on that page.
1683
     *
1684
     * @return string|null
1685
     */
1686
    public function get_edited_page_hash(): ?string {
1687
        global $SESSION;
1688
        if (!$this->user_is_editing()) {
1689
            return null;
1690
        }
1468 ariadna 1691
 
1692
        // Check if session is still active to prevent mutation after close
1693
        if (!\core\session\manager::session_exists(session_id()) || !\core\session\manager::is_session_active()) {
1694
            return null;
1695
        }
1696
 
1 efrain 1697
        $url = new moodle_url($this->url);
1698
        $url->set_anchor(null);
1699
        $data = [
1700
            'contextid' => $this->context->id,
1701
            'url' => $url->out_as_local_url(false),
1702
        ];
1703
        if (($cm = $this->cm) && $cm->id) {
1704
            $data['cmid'] = $cm->id;
1705
        } else if (($course = $this->course) && $course->id) {
1706
            $data['courseid'] = $course->id;
1707
        }
1708
        $keys = ['pagelayout', 'pagetype', 'subpage'];
1709
        foreach ($keys as $key) {
1710
            if ("{$this->$key}" !== "") {
1711
                $data[$key] = $this->$key;
1712
            }
1713
        }
1714
        if ($this->_blockseditingcap !== 'moodle/site:manageblocks') {
1715
            $data['bcap'] = $this->_blockseditingcap;
1716
        }
1717
        if (!empty($this->_othereditingcaps)) {
1718
            $data['caps'] = $this->_othereditingcaps;
1719
        }
1720
        if ($this->_forcelockallblocks) {
1721
            $data['forcelock'] = true;
1722
        }
1723
        $hash = md5(json_encode($data + ['sesskey' => sesskey()]));
1724
        $SESSION->editedpages = ($SESSION->editedpages ?? []);
1725
        $SESSION->editedpages[$hash] = $data;
1726
        return $hash;
1727
    }
1728
 
1729
    /**
1730
     * Retrieves a page that is being edited from the session cache
1731
     *
1732
     * {@see self::get_edited_page_hash()}
1733
     *
1734
     * @param string $hash
1735
     * @param int $strictness
1736
     * @return self|null
1737
     */
1738
    public static function retrieve_edited_page(string $hash, $strictness = IGNORE_MISSING): ?self {
1739
        global $CFG, $SESSION;
1740
        $data = $SESSION->editedpages[$hash] ?? null;
1741
        if (!$data || !is_array($data)
1742
                || $hash !== md5(json_encode($data + ['sesskey' => sesskey()]))) {
1743
            // This can happen if the session cache becomes corrupt or the user logged out and back
1744
            // in in another window and changed their session. Refreshing the page will generate
1745
            // and store the correct page hash.
1746
            if ($strictness === MUST_EXIST) {
1747
                throw new moodle_exception('editedpagenotfound');
1748
            }
1749
            return null;
1750
        }
1751
 
1752
        if (!empty($CFG->moodlepageclass)) {
1753
            if (!empty($CFG->moodlepageclassfile)) {
1754
                require_once($CFG->moodlepageclassfile);
1755
            }
1756
            $classname = $CFG->moodlepageclass;
1757
        } else {
1758
            $classname = self::class;
1759
        }
1760
        /** @var moodle_page $page */
1761
        $page = new $classname();
1762
        $page->set_context(context::instance_by_id($data['contextid']));
1763
        if (array_key_exists('cmid', $data)) {
1764
            [$course, $cm] = get_course_and_cm_from_cmid($data['cmid']);
1765
            $page->set_cm($cm, $course);
1766
        } else if (array_key_exists('courseid', $data)) {
1767
            $page->set_course(get_course($data['courseid']));
1768
        }
1769
        $page->set_url(new moodle_url($data['url']));
1770
        $keys = ['pagelayout', 'pagetype', 'subpage'];
1771
        foreach ($keys as $key) {
1772
            if (array_key_exists($key, $data)) {
1773
                $func = "set_{$key}";
1774
                $page->$func($data[$key]);
1775
            }
1776
        }
1777
        if (array_key_exists('bcap', $data)) {
1778
            $page->set_blocks_editing_capability($data['bcap']);
1779
        }
1780
        if (array_key_exists('caps', $data)) {
1781
            foreach ($data['caps'] as $cap) {
1782
                $page->set_other_editing_capability($cap);
1783
            }
1784
        }
1785
        if (array_key_exists('forcelock', $data)) {
1786
            $page->force_lock_all_blocks();
1787
        }
1788
        $page->blocks->add_custom_regions_for_pagetype($page->pagetype);
1789
        return $page;
1790
    }
1791
 
1792
    // Initialisation methods =====================================================
1793
    // These set various things up in a default way.
1794
 
1795
    /**
1796
     * This method is called when the page first moves out of the STATE_BEFORE_HEADER
1797
     * state. This is our last change to initialise things.
1798
     */
1799
    protected function starting_output() {
1800
        global $CFG;
1801
 
1802
        if (!during_initial_install()) {
1803
            $this->blocks->load_blocks();
1804
            if (empty($this->_block_actions_done)) {
1805
                $this->_block_actions_done = true;
1806
                if ($this->blocks->process_url_actions($this)) {
1807
                    redirect($this->url->out(false));
1808
                }
1809
            }
1810
            $this->blocks->create_all_block_instances();
1811
        }
1812
 
1813
        // If maintenance mode is on, change the page header.
1814
        if (!empty($CFG->maintenance_enabled)) {
1815
            $this->set_button('<a href="' . $CFG->wwwroot . '/' . $CFG->admin .
1816
                    '/settings.php?section=maintenancemode">' . get_string('maintenancemode', 'admin') .
1817
                    '</a> ' . $this->button);
1818
 
1819
            $this->set_title(get_string('maintenancemode', 'admin'));
1820
        }
1821
 
1822
        $this->initialise_standard_body_classes();
1823
    }
1824
 
1825
    /**
1826
     * Method for use by Moodle core to set up the theme. Do not
1827
     * use this in your own code.
1828
     *
1829
     * Make sure the right theme for this page is loaded. Tell our
1830
     * blocks_manager about the theme block regions, and then, if
1831
     * we are $PAGE, set up the global $OUTPUT.
1832
     *
1833
     * @return void
1834
     */
1835
    public function initialise_theme_and_output() {
1836
        global $OUTPUT, $PAGE, $SITE, $CFG;
1837
 
1838
        if (!empty($this->_wherethemewasinitialised)) {
1839
            return;
1840
        }
1841
 
1842
        if (!during_initial_install()) {
1843
            // Detect PAGE->context mess.
1844
            $this->magic_get_context();
1845
        }
1846
 
1847
        if (!$this->_course && !during_initial_install()) {
1848
            $this->set_course($SITE);
1849
        }
1850
 
1851
        if (is_null($this->_theme)) {
1852
            $themename = $this->resolve_theme();
1853
            $this->_theme = theme_config::load($themename);
1854
        }
1855
 
1856
        $this->_theme->setup_blocks($this->pagelayout, $this->blocks);
1857
 
1858
        if ($this === $PAGE) {
1859
            $target = null;
1860
            if ($this->pagelayout === 'maintenance') {
1861
                // If the page is using the maintenance layout then we're going to force target to maintenance.
1862
                // This leads to a special core renderer that is designed to block access to API's that are likely unavailable for this
1863
                // page layout.
1864
                $target = RENDERER_TARGET_MAINTENANCE;
1865
            }
1866
            $OUTPUT = $this->get_renderer('core', null, $target);
1867
        }
1868
 
1869
        if (!during_initial_install()) {
1870
            $filtermanager = filter_manager::instance();
1871
            $filtermanager->setup_page_for_globally_available_filters($this);
1872
        }
1873
 
1874
        $this->_wherethemewasinitialised = debug_backtrace();
1875
    }
1876
 
1877
    /**
1878
     * For diagnostic/debugging purposes, find where the theme setup was triggered.
1879
     *
1880
     * @return null|array null if theme not yet setup. Stacktrace if it was.
1881
     */
1882
    public function get_where_theme_was_initialised() {
1883
        return $this->_wherethemewasinitialised;
1884
    }
1885
 
1886
    /**
1887
     * Reset the theme and output for a new context. This only makes sense from
1888
     * external::validate_context(). Do not cheat.
1889
     */
1890
    public function reset_theme_and_output() {
1891
        global $COURSE, $SITE;
1892
 
1893
        $COURSE = clone($SITE);
1894
        $this->_theme = null;
1895
        $this->_wherethemewasinitialised = null;
1896
        $this->_course = null;
1897
        $this->_cm = null;
1898
        $this->_module = null;
1899
        $this->_context = null;
1900
    }
1901
 
1902
    /**
1903
     * Work out the theme this page should use.
1904
     *
1905
     * This depends on numerous $CFG settings, and the properties of this page.
1906
     *
1907
     * @return string the name of the theme that should be used on this page.
1908
     */
1909
    protected function resolve_theme() {
1910
        global $CFG, $USER, $SESSION;
1911
 
1912
        if (empty($CFG->themeorder)) {
1913
            $themeorder = array('course', 'category', 'session', 'user', 'cohort', 'site');
1914
        } else {
1915
            $themeorder = $CFG->themeorder;
1916
            // Just in case, make sure we always use the site theme if nothing else matched.
1917
            $themeorder[] = 'site';
1918
        }
1919
 
1920
        $mnetpeertheme = '';
1921
        $mnetvarsok = isset($CFG->mnet_localhost_id) && isset($USER->mnethostid);
1922
        if (isloggedin() and $mnetvarsok and $USER->mnethostid != $CFG->mnet_localhost_id) {
1923
            require_once($CFG->dirroot.'/mnet/peer.php');
1924
            $mnetpeer = new mnet_peer();
1925
            $mnetpeer->set_id($USER->mnethostid);
1926
            if ($mnetpeer->force_theme == 1 && $mnetpeer->theme != '') {
1927
                $mnetpeertheme = $mnetpeer->theme;
1928
            }
1929
        }
1930
 
1931
        foreach ($themeorder as $themetype) {
1932
 
1933
            switch ($themetype) {
1934
                case 'course':
1935
                    if (!empty($CFG->allowcoursethemes) && !empty($this->_course->theme)) {
1936
                        return $this->_course->theme;
1937
                    }
1938
                break;
1939
 
1940
                case 'category':
1941
                    if (!empty($CFG->allowcategorythemes) && !empty($this->_course)) {
1942
                        $categories = $this->categories;
1943
                        foreach ($categories as $category) {
1944
                            if (!empty($category->theme)) {
1945
                                return $category->theme;
1946
                            }
1947
                        }
1948
                    }
1949
                break;
1950
 
1951
                case 'session':
1952
                    if (!empty($SESSION->theme)) {
1953
                        return $SESSION->theme;
1954
                    }
1955
                break;
1956
 
1957
                case 'user':
1958
                    if (!empty($CFG->allowuserthemes) && !empty($USER->theme)) {
1959
                        if ($mnetpeertheme) {
1960
                            return $mnetpeertheme;
1961
                        } else {
1962
                            return $USER->theme;
1963
                        }
1964
                    }
1965
                break;
1966
 
1967
                case 'cohort':
1968
                    if (!empty($CFG->allowcohortthemes) && !empty($USER->cohorttheme)) {
1969
                        return $USER->cohorttheme;
1970
                    }
1971
                break;
1972
 
1973
                case 'site':
1974
                    if ($mnetpeertheme) {
1975
                        return $mnetpeertheme;
1976
                    }
1977
 
1978
                    // Use theme if it is set in config.
1979
                    if (!empty($CFG->theme)) {
1980
                        return $CFG->theme;
1981
                    }
1982
                    // Use the overall default theme.
1983
                    return theme_config::DEFAULT_THEME;
1984
            }
1985
        }
1986
 
1987
        // We should most certainly have resolved a theme by now. Something has gone wrong.
1988
        debugging('Error resolving the theme to use for this page.', DEBUG_DEVELOPER);
1989
        return theme_config::DEFAULT_THEME;
1990
    }
1991
 
1992
 
1993
    /**
1994
     * Sets ->pagetype from the script name. For example, if the script that was
1995
     * run is mod/quiz/view.php, ->pagetype will be set to 'mod-quiz-view'.
1996
     *
1997
     * @param string $script the path to the script that should be used to
1998
     * initialise ->pagetype. If not passed the $SCRIPT global will be used.
1999
     * If legacy code has set $CFG->pagepath that will be used instead, and a
2000
     * developer warning issued.
2001
     */
2002
    protected function initialise_default_pagetype($script = null) {
2003
        global $CFG, $SCRIPT;
2004
 
2005
        if (isset($CFG->pagepath)) {
2006
            debugging('Some code appears to have set $CFG->pagepath. That was a horrible deprecated thing. ' .
2007
                    'Don\'t do it! Try calling $PAGE->set_pagetype() instead.');
2008
            $script = $CFG->pagepath;
2009
            unset($CFG->pagepath);
2010
        }
2011
 
2012
        if (is_null($script)) {
2013
            $script = ltrim($SCRIPT ?? '', '/');
2014
            $len = strlen($CFG->admin);
2015
            if (substr($script, 0, $len) == $CFG->admin) {
2016
                $script = 'admin' . substr($script, $len);
2017
            }
2018
        }
2019
 
2020
        $path = str_replace('.php', '', $script);
2021
        if (substr($path, -1) == '/') {
2022
            $path .= 'index';
2023
        }
2024
 
2025
        if (empty($path) || $path == 'index') {
2026
            $this->_pagetype = 'site-index';
2027
        } else {
2028
            $this->_pagetype = str_replace('/', '-', $path);
2029
        }
2030
    }
2031
 
2032
    /**
2033
     * Initialises the CSS classes that will be added to body tag of the page.
2034
     *
2035
     * The function is responsible for adding all of the critical CSS classes
2036
     * that describe the current page, and its state.
2037
     * This includes classes that describe the following for example:
2038
     *    - Current language
2039
     *    - Language direction
2040
     *    - YUI CSS initialisation
2041
     *    - Pagelayout
2042
     * These are commonly used in CSS to target specific types of pages.
2043
     */
2044
    protected function initialise_standard_body_classes() {
2045
        global $CFG, $USER;
2046
 
2047
        $pagetype = $this->pagetype;
2048
        if ($pagetype == 'site-index') {
2049
            $this->_legacyclass = 'course';
2050
        } else if (substr($pagetype, 0, 6) == 'admin-') {
2051
            $this->_legacyclass = 'admin';
2052
        }
2053
        $this->add_body_class($this->_legacyclass);
2054
 
2055
        $pathbits = explode('-', trim($pagetype));
2056
        for ($i = 1; $i < count($pathbits); $i++) {
2057
            $this->add_body_class('path-' . join('-', array_slice($pathbits, 0, $i)));
2058
        }
2059
 
2060
        $this->add_body_classes(core_useragent::get_browser_version_classes());
2061
        $this->add_body_class('dir-' . get_string('thisdirection', 'langconfig'));
2062
        $this->add_body_class('lang-' . current_language());
2063
        $this->add_body_class('yui-skin-sam'); // Make YUI happy, if it is used.
2064
        $this->add_body_class('yui3-skin-sam'); // Make YUI3 happy, if it is used.
2065
        $this->add_body_class($this->url_to_class_name($CFG->wwwroot));
2066
 
2067
        // Extra class describing current page layout.
2068
        $this->add_body_class('pagelayout-' . $this->_pagelayout);
2069
 
2070
        if (!during_initial_install()) {
2071
            $this->add_body_class('course-' . $this->_course->id);
2072
            $this->add_body_class('context-' . $this->_context->id);
2073
        }
2074
 
2075
        if (!empty($this->_cm)) {
2076
            $this->add_body_class('cmid-' . $this->_cm->id);
2077
            $this->add_body_class('cm-type-' . $this->_cm->modname);
2078
        }
2079
 
2080
        if (!empty($CFG->allowcategorythemes) && !empty($this->_course)) {
2081
            $this->ensure_category_loaded();
2082
            foreach ($this->_categories as $catid => $notused) {
2083
                $this->add_body_class('category-' . $catid);
2084
            }
2085
        } else {
2086
            $catid = 0;
2087
            if (is_array($this->_categories)) {
2088
                $catids = array_keys($this->_categories);
2089
                $catid = reset($catids);
2090
            } else if (!empty($this->_course->category)) {
2091
                $catid = $this->_course->category;
2092
            }
2093
            if ($catid) {
2094
                $this->add_body_class('category-' . $catid);
2095
            }
2096
        }
2097
 
2098
        if (!isloggedin()) {
2099
            $this->add_body_class('notloggedin');
2100
        }
2101
 
2102
        if ($this->user_is_editing()) {
2103
            $this->add_body_class('editing');
2104
            if (optional_param('bui_moveid', false, PARAM_INT)) {
2105
                $this->add_body_class('blocks-moving');
2106
            }
2107
        }
2108
 
2109
        if (!empty($CFG->blocksdrag)) {
2110
            $this->add_body_class('drag');
2111
        }
2112
 
2113
        if ($this->_devicetypeinuse != 'default') {
2114
            $this->add_body_class($this->_devicetypeinuse . 'theme');
2115
        }
2116
 
2117
        if (!empty($CFG->themedesignermode)) {
2118
            $this->add_body_class('themedesignermode');
2119
        }
2120
 
2121
        // Add class for behat site to apply behat related fixes.
2122
        if (defined('BEHAT_SITE_RUNNING')) {
2123
            $this->add_body_class('behat-site');
2124
        }
2125
    }
2126
 
2127
    /**
2128
     * Loads the activity record for the current CM object associated with this
2129
     * page.
2130
     *
2131
     * This will load {@link moodle_page::$_module} with a row from the related
2132
     * module table in the database.
2133
     * For instance if {@link moodle_page::$_cm} is a forum then a row from the
2134
     * forum table will be loaded.
2135
     */
2136
    protected function load_activity_record() {
2137
        global $DB;
2138
        if (is_null($this->_cm)) {
2139
            return;
2140
        }
2141
        $this->_module = $DB->get_record($this->_cm->modname, array('id' => $this->_cm->instance));
2142
    }
2143
 
2144
    /**
2145
     * This function ensures that the category of the current course has been
2146
     * loaded, and if not, the function loads it now.
2147
     *
2148
     * @return void
2149
     * @throws coding_exception
2150
     */
2151
    protected function ensure_category_loaded() {
2152
        if (is_array($this->_categories)) {
2153
            return; // Already done.
2154
        }
2155
        if (is_null($this->_course)) {
2156
            throw new coding_exception('Attempt to get the course category for this page before the course was set.');
2157
        }
2158
        if ($this->_course->category == 0) {
2159
            $this->_categories = array();
2160
        } else {
2161
            $this->load_category($this->_course->category);
2162
        }
2163
    }
2164
 
2165
    /**
2166
     * Loads the requested category into the pages categories array.
2167
     *
2168
     * @param int $categoryid
2169
     * @throws moodle_exception
2170
     */
2171
    protected function load_category($categoryid) {
2172
        global $DB;
2173
        $category = $DB->get_record('course_categories', array('id' => $categoryid));
2174
        if (!$category) {
1441 ariadna 2175
            throw new moodle_exception('unknowncategory', a: $categoryid);
1 efrain 2176
        }
2177
        $this->_categories[$category->id] = $category;
2178
        $parentcategoryids = explode('/', trim($category->path, '/'));
2179
        array_pop($parentcategoryids);
2180
        foreach (array_reverse($parentcategoryids) as $catid) {
2181
            $this->_categories[$catid] = null;
2182
        }
2183
    }
2184
 
2185
    /**
2186
     * Ensures that the category the current course is within, as well as all of
2187
     * its parent categories, have been loaded.
2188
     *
2189
     * @return void
2190
     */
2191
    protected function ensure_categories_loaded() {
2192
        global $DB;
2193
        $this->ensure_category_loaded();
2194
        if (!is_null(end($this->_categories))) {
2195
            return; // Already done.
2196
        }
2197
        $idstoload = array_keys($this->_categories);
2198
        array_shift($idstoload);
2199
        $categories = $DB->get_records_list('course_categories', 'id', $idstoload);
2200
        foreach ($idstoload as $catid) {
2201
            $this->_categories[$catid] = $categories[$catid];
2202
        }
2203
    }
2204
 
2205
    /**
2206
     * Ensure the theme has not been loaded yet. If it has an exception is thrown.
2207
     *
2208
     * @throws coding_exception
2209
     */
2210
    protected function ensure_theme_not_set() {
2211
        // This is explicitly allowed for webservices though which may process many course contexts in a single request.
2212
        if (WS_SERVER) {
2213
            return;
2214
        }
2215
 
2216
        if (!is_null($this->_theme)) {
2217
            throw new coding_exception('The theme has already been set up for this page ready for output. ' .
2218
                    'Therefore, you can no longer change the theme, or anything that might affect what ' .
2219
                    'the current theme is, for example, the course.',
2220
                    'Stack trace when the theme was set up: ' . format_backtrace($this->_wherethemewasinitialised));
2221
        }
2222
    }
2223
 
2224
    /**
2225
     * Converts the provided URL into a CSS class that be used within the page.
2226
     * This is primarily used to add the wwwroot to the body tag as a CSS class.
2227
     *
2228
     * @param string $url
2229
     * @return string
2230
     */
2231
    protected function url_to_class_name($url) {
2232
        $bits = parse_url($url);
2233
        $class = str_replace('.', '-', $bits['host']);
2234
        if (!empty($bits['port'])) {
2235
            $class .= '--' . $bits['port'];
2236
        }
2237
        if (!empty($bits['path'])) {
2238
            $path = trim($bits['path'], '/');
2239
            if ($path) {
2240
                $class .= '--' . str_replace('/', '-', $path);
2241
            }
2242
        }
2243
        return $class;
2244
    }
2245
 
2246
    /**
2247
     * Combines all of the required editing caps for the page and returns them
2248
     * as an array.
2249
     *
2250
     * @return array
2251
     */
2252
    protected function all_editing_caps() {
2253
        $caps = $this->_othereditingcaps;
2254
        $caps[] = $this->_blockseditingcap;
2255
        return $caps;
2256
    }
2257
 
2258
    /**
2259
     * Returns true if the page URL has beem set.
2260
     *
2261
     * @return bool
2262
     */
2263
    public function has_set_url() {
2264
        return ($this->_url!==null);
2265
    }
2266
 
2267
    /**
2268
     * Gets set when the block actions for the page have been processed.
2269
     *
2270
     * @param bool $setting
2271
     */
2272
    public function set_block_actions_done($setting = true) {
2273
        $this->_block_actions_done = $setting;
2274
    }
2275
 
2276
    /**
2277
     * Are popup notifications allowed on this page?
2278
     * Popup notifications may be disallowed in situations such as while upgrading or completing a quiz
2279
     *
2280
     * @return bool true if popup notifications may be displayed
2281
     */
2282
    public function get_popup_notification_allowed() {
2283
        return $this->_popup_notification_allowed;
2284
    }
2285
 
2286
    /**
2287
     * Allow or disallow popup notifications on this page. Popups are allowed by default.
2288
     *
2289
     * @param bool $allowed true if notifications are allowed. False if not allowed. They are allowed by default.
2290
     */
2291
    public function set_popup_notification_allowed($allowed) {
2292
        $this->_popup_notification_allowed = $allowed;
2293
    }
2294
 
2295
    /**
2296
     * Returns the block region having made any required theme manipulations.
2297
     *
2298
     * @since Moodle 2.5.1 2.6
2299
     * @param string $region
2300
     * @return string
2301
     */
2302
    public function apply_theme_region_manipulations($region) {
2303
        if ($this->blockmanipulations && isset($this->blockmanipulations[$region])) {
2304
            $regionwas = $region;
2305
            $regionnow = $this->blockmanipulations[$region];
2306
            if ($this->blocks->is_known_region($regionwas) && $this->blocks->is_known_region($regionnow)) {
2307
                // Both the before and after regions are known so we can swap them over.
2308
                return $regionnow;
2309
            }
2310
            // We didn't know about both, we won't swap them over.
2311
            return $regionwas;
2312
        }
2313
        return $region;
2314
    }
2315
 
2316
    /**
2317
     * Add a report node and a specific report to the navigation.
2318
     *
2319
     * @param int $userid The user ID that we are looking to add this report node to.
2320
     * @param array $nodeinfo Name and url of the final node that we are creating.
2321
     */
2322
    public function add_report_nodes($userid, $nodeinfo) {
2323
        global $USER;
2324
        // Try to find the specific user node.
2325
        $newusernode = $this->navigation->find('user' . $userid, null);
2326
        $reportnode = null;
2327
        $navigationnodeerror =
2328
                'Could not find the navigation node requested. Please check that the node you are looking for exists.';
2329
        if ($userid != $USER->id  || $this->context->contextlevel == CONTEXT_COURSE) {
2330
            // Within a course context we need to properly indicate how we have come to the page,
2331
            // regardless of whether it's currently logged in user or not.
2332
            // Check that we have a valid node.
2333
            if (empty($newusernode)) {
2334
                // Throw an error if we ever reach here.
2335
                throw new coding_exception($navigationnodeerror);
2336
            }
2337
            // Add 'Reports' to the user node.
2338
            $reportnode = $newusernode->add(get_string('reports'));
2339
        } else {
2340
            // We are looking at our own profile.
2341
            $myprofilenode = $this->settingsnav->find('myprofile', null);
2342
            // Check that we do end up with a valid node.
2343
            if (empty($myprofilenode)) {
2344
                // Throw an error if we ever reach here.
2345
                throw new coding_exception($navigationnodeerror);
2346
            }
2347
            // Add 'Reports' to our node.
2348
            $reportnode = $myprofilenode->add(get_string('reports'));
2349
        }
2350
        // Finally add the report to the navigation tree.
2351
        $reportnode->add($nodeinfo['name'], $nodeinfo['url'], navigation_node::TYPE_CUSTOM, null, null,
2352
            new pix_icon('i/report', $nodeinfo['name']));
2353
    }
2354
 
2355
    /**
2356
     * Add some HTML to the list of actions to render in the header actions menu.
2357
     *
2358
     * @param string $html The HTML to add.
2359
     */
2360
    public function add_header_action(string $html): void {
2361
        $this->_headeractions[] = $html;
2362
    }
2363
 
2364
    /**
2365
     * Get the list of HTML for actions to render in the header actions menu.
2366
     *
2367
     * @return string[]
2368
     */
2369
    public function get_header_actions(): array {
2370
        return $this->_headeractions;
2371
    }
2372
 
2373
    /**
2374
     * Set the flag to indicate if the region main settings should be rendered as an action
2375
     * in the header actions menu rather than at the top of the content.
2376
     *
2377
     * @param bool $value If the settings should be in the header.
2378
     */
2379
    public function set_include_region_main_settings_in_header_actions(bool $value): void {
2380
        $this->_regionmainsettingsinheader = $value;
2381
    }
2382
 
2383
    /**
2384
     * Check if the  region main settings should be rendered as an action in the header actions
2385
     * menu rather than at the top of the content.
2386
     *
2387
     * @return bool
2388
     */
2389
    public function include_region_main_settings_in_header_actions(): bool {
2390
        return $this->_regionmainsettingsinheader;
2391
    }
2392
 
2393
    /**
2394
     * Set the flag to indicate if the secondary navigation should be rendered.
2395
     *
2396
     * @param bool $hassecondarynavigation If the secondary navigation should be rendered.
2397
     * @param bool $istablist When true, the navigation bar should be rendered and behave with a tablist ARIA role.
2398
     *                        If false, it's rendered with a menubar ARIA role. Defaults to false.
2399
     */
2400
    public function set_secondary_navigation(bool $hassecondarynavigation, bool $istablist = false): void {
2401
        $this->_hassecondarynavigation = $hassecondarynavigation;
2402
        $this->_hastablistsecondarynavigation = $istablist;
2403
    }
2404
 
2405
    /**
2406
     * Check if the secondary navigation should be rendered.
2407
     *
2408
     * @return bool
2409
     */
2410
    public function has_secondary_navigation(): bool {
2411
        return $this->_hassecondarynavigation;
2412
    }
2413
 
2414
    /**
2415
     * Check if the secondary navigation should be rendered with a tablist as opposed to a menubar.
2416
     *
2417
     * @return bool
2418
     */
2419
    public function has_tablist_secondary_navigation(): bool {
2420
        return $this->_hastablistsecondarynavigation;
2421
    }
2422
 
2423
    /**
2424
     * Set the key of the secondary nav node to be activated.
2425
     *
2426
     * @param string $navkey the key of the secondary nav node to be activated.
2427
     */
2428
    public function set_secondary_active_tab(string $navkey): void {
2429
        $this->_activekeysecondary = $navkey;
2430
    }
2431
 
2432
    /**
2433
     * The key of secondary nav node to activate.
2434
     *
2435
     * @return string|null get the key of the secondary node to activate.
2436
     */
2437
    public function get_secondary_active_tab(): ?string {
2438
        return $this->_activekeysecondary;
2439
    }
2440
 
2441
    /**
2442
     * Set the key of the primary nav node to be activated.
2443
     *
2444
     * @param string $navkey
2445
     */
2446
    public function set_primary_active_tab(string $navkey): void {
2447
        $this->_activenodeprimary = $navkey;
2448
    }
2449
 
2450
    /**
2451
     * The key of the primary nav node to activate.
2452
     *
2453
     * @return string|null get the key of the primary nav node to activate.
2454
     */
2455
    public function get_primary_activate_tab(): ?string {
2456
        return $this->_activenodeprimary;
2457
    }
2458
 
2459
    /**
2460
     * Sets the navigation overflow state. This allows developers to turn off the overflow menu if they perhaps are using
2461
     * some other navigation to show settings.
2462
     *
2463
     * @param bool  $state  The state of whether to show the navigation overflow.
2464
     */
2465
    public function set_navigation_overflow_state(bool $state): void {
2466
        $this->_navigationoverflow = $state;
2467
    }
2468
 
2469
    /**
2470
     * Gets the navigation overflow state.
2471
     *
2472
     * @return bool The navigation overflow state.
2473
     */
2474
    public function get_navigation_overflow_state(): bool {
2475
        return $this->_navigationoverflow;
2476
    }
2477
 
2478
    /**
2479
     * Set the status for displaying the course index.
2480
     *
2481
     * @param bool $state
2482
     *     - `true` (default) if the course index should be shown.
2483
     *     - `false` if the course index should be hidden.
2484
     */
2485
    public function set_show_course_index(bool $state): void {
2486
        $this->_showcourseindex = $state;
2487
    }
2488
 
2489
    /**
2490
     * Get the current status for displaying the course index.
2491
     *
2492
     * @return bool
2493
     */
2494
    public function get_show_course_index(): bool {
2495
        return $this->_showcourseindex;
2496
    }
2497
}