summaryrefslogtreecommitdiff
path: root/extensions/Gadgets/Gadgets_body.php
blob: 24196dd380754a4304801183b653036404c5c136 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
<?php
/**
 * Gadgets extension - lets users select custom javascript gadgets
 *
 * For more info see http://mediawiki.org/wiki/Extension:Gadgets
 *
 * @file
 * @ingroup Extensions
 * @author Daniel Kinzler, brightbyte.de
 * @copyright © 2007 Daniel Kinzler
 * @license GNU General Public Licence 2.0 or later
 */


/**
 * Wrapper for one gadget.
 */
class Gadget {
	/**
	 * Increment this when changing class structure
	 */
	const GADGET_CLASS_VERSION = 7;

	private $scripts = array(),
			$styles = array(),
			$dependencies = array(),
			$name,
			$definition,
			$resourceLoaded = false,
			$requiredRights = array(),
			$requiredSkins = array(),
			$targets = array( 'desktop' ),
			$onByDefault = false,
			$position = 'bottom',
			$category;

	/**
	 * Creates an instance of this class from definition in MediaWiki:Gadgets-definition
	 * @param $definition String: Gadget definition
	 * @return Gadget|bool Instance of Gadget class or false if $definition is invalid
	 */
	public static function newFromDefinition( $definition ) {
		$m = array();
		if ( !preg_match( '/^\*+ *([a-zA-Z](?:[-_:.\w\d ]*[a-zA-Z0-9])?)(\s*\[.*?\])?\s*((\|[^|]*)+)\s*$/', $definition, $m ) ) {
			return false;
		}
		// NOTE: the gadget name is used as part of the name of a form field,
		//      and must follow the rules defined in http://www.w3.org/TR/html4/types.html#type-cdata
		//      Also, title-normalization applies.
		$gadget = new Gadget();
		$gadget->name = trim( str_replace( ' ', '_', $m[1] ) );
		// If the name is too long, then RL will throw an MWException when
		// we try to register the module
		if ( !ResourceLoader::isValidModuleName( $gadget->getModuleName() ) ) {
			return false;
		}
		$gadget->definition = $definition;
		$options = trim( $m[2], ' []' );

		foreach ( preg_split( '/\s*\|\s*/', $options, -1, PREG_SPLIT_NO_EMPTY ) as $option ) {
			$arr  = preg_split( '/\s*=\s*/', $option, 2 );
			$option = $arr[0];
			if ( isset( $arr[1] ) ) {
				$params = explode( ',', $arr[1] );
				$params = array_map( 'trim', $params );
			} else {
				$params = array();
			}

			switch ( $option ) {
				case 'ResourceLoader':
					$gadget->resourceLoaded = true;
					break;
				case 'dependencies':
					$gadget->dependencies = $params;
					break;
				case 'rights':
					$gadget->requiredRights = $params;
					break;
				case 'skins':
					$gadget->requiredSkins = $params;
					break;
				case 'default':
					$gadget->onByDefault = true;
					break;
				case 'targets':
					$gadget->targets = $params;
					break;
				case 'top':
					$gadget->position = 'top';
					break;
			}
		}

		foreach ( preg_split( '/\s*\|\s*/', $m[3], -1, PREG_SPLIT_NO_EMPTY ) as $page ) {
			$page = "Gadget-$page";

			if ( preg_match( '/\.js/', $page ) ) {
				$gadget->scripts[] = $page;
			} elseif ( preg_match( '/\.css/', $page ) ) {
				$gadget->styles[] = $page;
			}
		}

		return $gadget;
	}

	/**
	 * @return String: Gadget name
	 */
	public function getName() {
		return $this->name;
	}

	/**
	 * @return String: Gadget description parsed into HTML
	 */
	public function getDescription() {
		return wfMessage( "gadget-{$this->getName()}" )->parse();
	}

	/**
	 * @return String: Wikitext of gadget description
	 */
	public function getRawDescription() {
		return wfMessage( "gadget-{$this->getName()}" )->plain();
	}

	/**
	 * @return String: Name of category (aka section) our gadget belongs to. Empty string if none.
	 */
	public function getCategory() {
		return $this->category;
	}

	/**
	 * @return String: Name of ResourceLoader module for this gadget
	 */
	public function getModuleName() {
		return "ext.gadget.{$this->name}";
	}

	/**
	 * Checks whether this gadget is enabled for given user
	 *
	 * @param $user User: user to check against
	 * @return Boolean
	 */
	public function isEnabled( $user ) {
		return (bool)$user->getOption( "gadget-{$this->name}", $this->onByDefault );
	}

	/**
	 * Checks whether given user has permissions to use this gadget
	 *
	 * @param $user User: user to check against
	 * @return Boolean
	 */
	public function isAllowed( $user ) {
		return count( array_intersect( $this->requiredRights, $user->getRights() ) ) == count( $this->requiredRights )
			&& ( !count( $this->requiredSkins ) || in_array( $user->getOption( 'skin' ), $this->requiredSkins ) );
	}

	/**
	 * @return Boolean: Whether this gadget is on by default for everyone (but can be disabled in preferences)
	 */
	public function isOnByDefault() {
		return $this->onByDefault;
	}

	/**
	 * @return Boolean: Whether all of this gadget's JS components support ResourceLoader
	 */
	public function supportsResourceLoader() {
		return $this->resourceLoaded;
	}

	/**
	 * @return Boolean: Whether this gadget has resources that can be loaded via ResourceLoader
	 */
	public function hasModule() {
		return count( $this->styles )
			+ ( $this->supportsResourceLoader() ? count( $this->scripts ) : 0 )
				> 0;
	}

	/**
	 * @return String: Definition for this gadget from MediaWiki:gadgets-definition
	 */
	public function getDefinition() {
		return $this->definition;
	}

	/**
	 * @return Array: Array of pages with JS not prefixed with namespace
	 */
	public function getScripts() {
		return $this->scripts;
	}

	/**
	 * @return Array: Array of pages with CSS not prefixed with namespace
	 */
	public function getStyles() {
		return $this->styles;
	}

	/**
	 * @return Array: Array of all of this gadget's resources
	 */
	public function getScriptsAndStyles() {
		return array_merge( $this->scripts, $this->styles );
	}

	/**
	 * Returns module for ResourceLoader, see getModuleName() for its name.
	 * If our gadget has no scripts or styles suitable for RL, false will be returned.
	 * @return Mixed: GadgetResourceLoaderModule or false
	 */
	public function getModule() {
		$pages = array();

		foreach ( $this->styles as $style ) {
			$pages['MediaWiki:' . $style] = array( 'type' => 'style' );
		}

		if ( $this->supportsResourceLoader() ) {
			foreach ( $this->scripts as $script ) {
				$pages['MediaWiki:' . $script] = array( 'type' => 'script' );
			}
		}

		if ( !count( $pages ) ) {
			return null;
		}

		return new GadgetResourceLoaderModule( $pages, $this->dependencies, $this->targets, $this->position );
	}

	/**
	 * Returns list of scripts that don't support ResourceLoader
	 * @return Array
	 */
	public function getLegacyScripts() {
		if ( $this->supportsResourceLoader() ) {
			return array();
		}
		return $this->scripts;
	}

	/**
	 * Returns names of resources this gadget depends on
	 * @return Array
	 */
	public function getDependencies() {
		return $this->dependencies;
	}

	/**
	 * Returns array of permissions required by this gadget
	 * @return Array
	 */
	public function getRequiredRights() {
		return $this->requiredRights;
	}

	/**
	 * Returns array of skins where this gadget works
	 * @return Array
	 */
	public function getRequiredSkins() {
		return $this->requiredSkins;
	}

	/**
	 * Returns the position of this Gadget's ResourceLoader module
	 * @return String: 'bottom' or 'top'
	 */
	public function getPosition() {
		return $this->position;
	}

	/**
	 * Loads and returns a list of all gadgets
	 * @return Mixed: Array of gadgets or false
	 */
	public static function loadList() {
		static $gadgets = null;

		if ( $gadgets !== null ) {
			return $gadgets;
		}

		wfProfileIn( __METHOD__ );
		$struct = self::loadStructuredList();

		if ( !$struct ) {
			$gadgets = $struct;
			wfProfileOut( __METHOD__ );
			return $gadgets;
		}

		$gadgets = array();
		foreach ( $struct as $entries ) {
			$gadgets = array_merge( $gadgets, $entries );
		}
		wfProfileOut( __METHOD__ );

		return $gadgets;
	}

	/**
	 * Checks whether gadget list from cache can be used.
	 * @param $gadgets array
	 * @return Boolean
	 */
	private static function isValidList( $gadgets ) {
		if ( !is_array( $gadgets ) ) {
			return false;
		}
		// Check if we have an array of gadgets
		// One check is enough
		/**
		 * @var $g Gadget
		 */
		foreach ( $gadgets as $list ) {
			foreach ( $list as $g ) {
				return $g instanceof Gadget;
			}
		}

		return true; // empty array
	}

	/**
	 * Loads list of gadgets and returns it as associative array of sections with gadgets
	 * e.g. array( 'sectionnname1' => array( $gadget1, $gadget2 ),
	 *             'sectionnname2' => array( $gadget3 ) );
	 * @param $forceNewText String: New text of MediaWiki:gadgets-definition. If specified, will
	 * 	      force a purge of cache and recreation of the gadget list.
	 * @return Mixed: Array or false
	 */
	public static function loadStructuredList( $forceNewText = null ) {
		global $wgMemc, $wgGadgetsCaching;

		static $gadgets = null;
		if ( $gadgets !== null && $forceNewText === null ) {
			return $gadgets;
		}

		wfProfileIn( __METHOD__ );
		$key = wfMemcKey( 'gadgets-definition', self::GADGET_CLASS_VERSION );

		if ( $forceNewText === null ) {
			if ( $wgGadgetsCaching ) {
				// cached?
				$gadgets = $wgMemc->get( $key );
				if ( self::isValidList( $gadgets ) ) {
					wfProfileOut( __METHOD__ );
					return $gadgets;
				}
			}

			$g = wfMessage( "gadgets-definition" )->inContentLanguage();
			if ( !$g->exists() ) {
				$gadgets = false;
				wfProfileOut( __METHOD__ );
				return $gadgets;
			}
			$g = $g->plain();
		} else {
			$g = $forceNewText;
		}

		$gadgets = self::listFromDefinition( $g );

		if ( !count( $gadgets ) || !$wgGadgetsCaching ) {
			// Don't cache in case we couldn't find any gadgets. Bug 37228
			$gadgets = false;
			wfProfileOut( __METHOD__ );
			return $gadgets;
		}

		// cache for a while. gets purged automatically when MediaWiki:Gadgets-definition is edited
		$wgMemc->set( $key, $gadgets, 60 * 60 * 24 );
		$source = $forceNewText !== null ? 'input text' : 'MediaWiki:Gadgets-definition';
		wfDebug( __METHOD__ . ": $source parsed, cache entry $key updated\n" );
		wfProfileOut( __METHOD__ );

		return $gadgets;
	}

	/**
	 * Generates a structured list of Gadget objects from a definition
	 *
	 * @param $definition
	 * @return array Array( category => Array( name => Gadget ) )
	 */
	private static function listFromDefinition( $definition ) {
		$definition = preg_replace( '/<!--.*?-->/s', '', $definition );
		$lines = preg_split( '/(\r\n|\r|\n)+/', $definition );

		$gadgets = array();
		$section = '';

		foreach ( $lines as $line ) {
			$m = array();
			if ( preg_match( '/^==+ *([^*:\s|]+?)\s*==+\s*$/', $line, $m ) ) {
				$section = $m[1];
			} else {
				$gadget = self::newFromDefinition( $line );
				if ( $gadget ) {
					$gadgets[$section][$gadget->getName()] = $gadget;
					$gadget->category = $section;
				}
			}
		}
		return $gadgets;
	}
}

/**
 * Class representing a list of resources for one gadget
 */
class GadgetResourceLoaderModule extends ResourceLoaderWikiModule {
	private $pages, $dependencies;

	/**
	 * Creates an instance of this class
	 *
	 * @param $pages Array: Associative array of pages in ResourceLoaderWikiModule-compatible
	 * format, for example:
	 * array(
	 *        'MediaWiki:Gadget-foo.js'  => array( 'type' => 'script' ),
	 *        'MediaWiki:Gadget-foo.css' => array( 'type' => 'style' ),
	 * )
	 * @param $dependencies Array: Names of resources this module depends on
	 * @param $targets Array: List of targets this module support
	 * @param $position String: 'bottom' or 'top'
	 */
	public function __construct( $pages, $dependencies, $targets, $position ) {
		$this->pages = $pages;
		$this->dependencies = $dependencies;
		$this->targets = $targets;
		$this->position = $position;
	}

	/**
	 * Overrides the abstract function from ResourceLoaderWikiModule class
	 * @param $context ResourceLoaderContext
	 * @return Array: $pages passed to __construct()
	 */
	protected function getPages( ResourceLoaderContext $context ) {
		return $this->pages;
	}

	/**
	 * Overrides ResourceLoaderModule::getDependencies()
	 * @return Array: Names of resources this module depends on
	 */
	public function getDependencies() {
		return $this->dependencies;
	}

	/**
	 * Overrides ResourceLoaderModule::getPosition()
	 * @return String: 'bottom' or 'top'
	 */
	public function getPosition() {
		return $this->position;
	}
}