summaryrefslogtreecommitdiff
path: root/extensions/TitleBlacklist/TitleBlacklist.list.php
blob: 3947e8aed1c2d79ea51710d3c831776660240dc1 (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
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
<?php
/**
 * Title Blacklist class
 * @author Victor Vasiliev
 * @copyright © 2007-2010 Victor Vasiliev et al
 * @license GNU General Public License 2.0 or later
 * @file
 */

//@{
/**
 * @ingroup Extensions
 */

/**
 * Implements a title blacklist for MediaWiki
 */
class TitleBlacklist {
	private $mBlacklist = null, $mWhitelist = null;
	const VERSION = 3;	// Blacklist format

	/**
	 * Get an instance of this class
	 *
	 * @return TitleBlacklist
	 */
	public static function singleton() {
		static $instance = null;

		if ( $instance === null ) {
			$instance = new self;
		}
		return $instance;
	}

	/**
	 * Load all configured blacklist sources
	 */
	public function load() {
		global $wgTitleBlacklistSources, $wgMemc, $wgTitleBlacklistCaching;
		wfProfileIn( __METHOD__ );
		// Try to find something in the cache
		$cachedBlacklist = $wgMemc->get( wfMemcKey( "title_blacklist_entries" ) );
		if ( is_array( $cachedBlacklist ) && count( $cachedBlacklist ) > 0 && ( $cachedBlacklist[0]->getFormatVersion() == self::VERSION ) ) {
			$this->mBlacklist = $cachedBlacklist;
			wfProfileOut( __METHOD__ );
			return;
		}

		$sources = $wgTitleBlacklistSources;
		$sources['local'] = array( 'type' => TBLSRC_MSG );
		$this->mBlacklist = array();
		foreach( $sources as $sourceName => $source ) {
			$this->mBlacklist = array_merge( $this->mBlacklist, $this->parseBlacklist( $this->getBlacklistText( $source ), $sourceName ) );
		}
		$wgMemc->set( wfMemcKey( "title_blacklist_entries" ), $this->mBlacklist, $wgTitleBlacklistCaching['expiry'] );
		wfProfileOut( __METHOD__ );
	}

	/**
	 * Load local whitelist
	 */
	public function loadWhitelist() {
		global $wgMemc, $wgTitleBlacklistCaching;
		wfProfileIn( __METHOD__ );
		$cachedWhitelist = $wgMemc->get( wfMemcKey( "title_whitelist_entries" ) );
		if ( is_array( $cachedWhitelist ) && count( $cachedWhitelist ) > 0 && ( $cachedWhitelist[0]->getFormatVersion() != self::VERSION ) ) {
			$this->mWhitelist = $cachedWhitelist;
			wfProfileOut( __METHOD__ );
			return;
		}
		$this->mWhitelist = $this->parseBlacklist( wfMessage( 'titlewhitelist' )
				->inContentLanguage()->text(), 'whitelist' );
		$wgMemc->set( wfMemcKey( "title_whitelist_entries" ), $this->mWhitelist, $wgTitleBlacklistCaching['expiry'] );
		wfProfileOut( __METHOD__ );
	}

	/**
	 * Get the text of a blacklist from a specified source
	 *
	 * @param $source A blacklist source from $wgTitleBlacklistSources
	 * @return The content of the blacklist source as a string
	 */
	private static function getBlacklistText( $source ) {
		if ( !is_array( $source ) || count( $source ) <= 0 ) {
			return '';	// Return empty string in error case
		}

		if ( $source['type'] == TBLSRC_MSG ) {
			return wfMessage( 'titleblacklist' )->inContentLanguage()->text();
		} elseif ( $source['type'] == TBLSRC_LOCALPAGE && count( $source ) >= 2 ) {
			$title = Title::newFromText( $source['src'] );
			if ( is_null( $title ) ) {
				return '';
			}
			if ( $title->getNamespace() == NS_MEDIAWIKI ) {
				$msg = wfMessage( $title->getText() )->inContentLanguage()->text();
				if ( !wfMessage( 'titleblacklist', $msg )->isDisabled() ) {
					return $msg;
				} else {
					return '';
				}
			} else {
				$article = new Article( $title );
				if ( $article->exists() ) {
					$article->followRedirect();
					return $article->getContent();
				}
			}
		} elseif ( $source['type'] == TBLSRC_URL && count( $source ) >= 2 ) {
			return self::getHttp( $source['src'] );
		} elseif ( $source['type'] == TBLSRC_FILE && count( $source ) >= 2 ) {
			if ( file_exists( $source['src'] ) ) {
				return file_get_contents( $source['src'] );
			} else {
				return '';
			}
		}

		return '';
	}

	/**
	 * Parse blacklist from a string
	 *
	 * @param $list string Text of a blacklist source
	 * @return array of TitleBlacklistEntry entries
	 */
	public static function parseBlacklist( $list, $sourceName ) {
		wfProfileIn( __METHOD__ );
		$lines = preg_split( "/\r?\n/", $list );
		$result = array();
		foreach ( $lines as $line ) {
			$line = TitleBlacklistEntry :: newFromString( $line, $sourceName );
			if ( $line ) {
				$result[] = $line;
			}
		}

		wfProfileOut( __METHOD__ );
		return $result;
	}

	/**
	 * Check whether the blacklist restricts giver nuser
	 * performing a specific action on the given Title
	 *
	 * @param $title Title to check
	 * @param $user User to check
	 * @param $action string Action to check; 'edit' if unspecified
	 * @param $override bool If set to true, overrides work
	 * @return TitleBlacklistEntry|bool The corresponding TitleBlacklistEntry if
	 * blacklisted; otherwise false
	 */
	public function userCannot( $title, $user, $action = 'edit', $override = true ) {
		if ( $override && self::userCanOverride( $user, $action ) ) {
			return false;
		} else {
			$entry = $this->isBlacklisted( $title, $action );
			if ( !$entry ) {
				return false;
			}
			$params = $entry->getParams();
			return isset( $params['autoconfirmed'] ) && $user->isAllowed( 'autoconfirmed' ) ? false : $entry;
		}
	}

	/**
	 * Check whether the blacklist restricts
	 * performing a specific action on the given Title
	 *
	 * @param $title Title to check
	 * @param $action string Action to check; 'edit' if unspecified
	 * @return TitleBlacklistEntry|bool The corresponding TitleBlacklistEntry if blacklisted;
	 *         otherwise FALSE
	 */
	public function isBlacklisted( $title, $action = 'edit' ) {
		if ( !( $title instanceof Title ) ) {
			$title = Title::newFromText( $title );
			if ( !( $title instanceof Title ) ) {
				// The fact that the page name is invalid will stop whatever
				// action is going through. No sense in doing more work here.
				return false;
			}
		}
		$blacklist = $this->getBlacklist();
		$autoconfirmedItem = false;
		foreach ( $blacklist as $item ) {
			if ( $item->matches( $title->getFullText(), $action ) ) {
				if ( $this->isWhitelisted( $title, $action ) ) {
					return false;
				}
				$params = $item->getParams();
				if ( !isset( $params['autoconfirmed'] ) ) {
					return $item;
				}
				if ( !$autoconfirmedItem ) {
					$autoconfirmedItem = $item;
				}
			}
		}
		return $autoconfirmedItem;
	}

	/**
	 * Check whether it has been explicitly whitelisted that the
	 * current User may perform a specific action on the given Title
	 *
	 * @param $title Title to check
	 * @param $action string Action to check; 'edit' if unspecified
	 * @return bool True if whitelisted; otherwise false
	 */
	public function isWhitelisted( $title, $action = 'edit' ) {
		if ( !( $title instanceof Title ) ) {
			$title = Title::newFromText( $title );
		}
		$whitelist = $this->getWhitelist();
		foreach ( $whitelist as $item ) {
			if ( $item->matches( $title->getFullText(), $action ) ) {
				return true;
			}
		}
		return false;
	}

	/**
	 * Get the current blacklist
	 *
	 * @return Array of TitleBlacklistEntry items
	 */
	public function getBlacklist() {
		if ( is_null( $this->mBlacklist ) ) {
			$this->load();
		}
		return $this->mBlacklist;
	}

	/**
	 * Get the current whitelist
	 *
	 * @return Array of TitleBlacklistEntry items
	 */
	public function getWhitelist() {
		if ( is_null( $this->mWhitelist ) ) {
			$this->loadWhitelist();
		}
		return $this->mWhitelist;
	}

	/**
	 * Get the text of a blacklist source via HTTP
	 *
	 * @param $url string URL of the blacklist source
	 * @return string The content of the blacklist source as a string
	 */
	private static function getHttp( $url ) {
		global $messageMemc, $wgTitleBlacklistCaching;
		$key = "title_blacklist_source:" . md5( $url ); // Global shared
		$warnkey = wfMemcKey( "titleblacklistwarning", md5( $url ) );
		$result = $messageMemc->get( $key );
		$warn = $messageMemc->get( $warnkey );
		if ( !is_string( $result ) || ( !$warn && !mt_rand( 0, $wgTitleBlacklistCaching['warningchance'] ) ) ) {
			$result = Http::get( $url );
			$messageMemc->set( $warnkey, 1, $wgTitleBlacklistCaching['warningexpiry'] );
			$messageMemc->set( $key, $result, $wgTitleBlacklistCaching['expiry'] );
		}
		return $result;
	}

	/**
	 * Invalidate the blacklist cache
	 */
	public function invalidate() {
		global $wgMemc;
		$wgMemc->delete( wfMemcKey( "title_blacklist_entries" ) );
	}

	/**
	 * Validate a new blacklist
	 *
	 * @param $blacklist array
	 * @return Array of bad entries; empty array means blacklist is valid
	 */
	public function validate( $blacklist ) {
		$badEntries = array();
		foreach ( $blacklist as $e ) {
			wfSuppressWarnings();
			$regex = $e->getRegex();
			if ( preg_match( "/{$regex}/u", '' ) === false ) {
				$badEntries[] = $e->getRaw();
			}
			wfRestoreWarnings();
		}
		return $badEntries;
	}

	/**
	 * Inidcates whether user can override blacklist on certain action.
	 *
	 * @param $action Action
	 *
	 * @return bool
	 */
	public static function userCanOverride( $user, $action ) {
		return $user->isAllowed( 'tboverride' ) ||
			( $action == 'new-account' && $user->isAllowed( 'tboverride-account' ) );
	}
}


/**
 * Represents a title blacklist entry
 */
class TitleBlacklistEntry {
	private
		$mRaw,           ///< Raw line
		$mRegex,         ///< Regular expression to match
		$mParams,        ///< Parameters for this entry
		$mFormatVersion, ///< Entry format version
		$mSource;        ///< Source of this entry

	/**
	 * Construct a new TitleBlacklistEntry.
	 *
	 * @param $regex string Regular expression to match
	 * @param $params array Parameters for this entry
	 * @param $raw string Raw contents of this line
	 */
	private function __construct( $regex, $params, $raw, $source ) {
		$this->mRaw = $raw;
		$this->mRegex = $regex;
		$this->mParams = $params;
		$this->mFormatVersion = TitleBlacklist::VERSION;
		$this->mSource = $source;
	}

	/**
	 * Returns whether this entry is capable of filtering new accounts.
	 */
	private function filtersNewAccounts() {
		global $wgTitleBlacklistUsernameSources;

		if( $wgTitleBlacklistUsernameSources === '*' ) {
			return true;
		}

		if( !$wgTitleBlacklistUsernameSources ) {
			return false;
		}

		if( !is_array( $wgTitleBlacklistUsernameSources ) ) {
			throw new MWException(
				'$wgTitleBlacklistUsernameSources must be "*", false or an array' );
		}

		return in_array( $this->mSource, $wgTitleBlacklistUsernameSources, true );
	}

	/**
	 * Check whether a user can perform the specified action
	 * on the specified Title
	 *
	 * @param $title string to check
	 * @param $action %Action to check
	 * @return bool TRUE if the the regex matches the title, and is not overridden
	 * else false if it doesn't match (or was overridden)
	 */
	public function matches( $title, $action ) {
		if ( !$title ) {
			return false;
		}

		if( $action == 'new-account' && !$this->filtersNewAccounts() ) {
			return false;
		}

		if ( isset( $this->mParams['antispoof'] ) && is_callable( 'AntiSpoof::checkUnicodeString' ) ) {
			list( $ok, $norm ) = AntiSpoof::checkUnicodeString( $title );
			if ( $ok == "OK" ) {
				list( $ver, $title ) = explode( ':', $norm, 2 );
			} else {
				wfDebugLog( 'TitleBlacklist', 'AntiSpoof could not normalize "' . $title . '".' );
			}
		}

		wfSuppressWarnings();
		$match = preg_match( "/^(?:{$this->mRegex})$/us" . ( isset( $this->mParams['casesensitive'] ) ? '' : 'i' ), $title );
		wfRestoreWarnings();

		if ( $match ) {
			if ( isset( $this->mParams['moveonly'] ) && $action != 'move' ) {
				return false;
			}
			if ( isset( $this->mParams['newaccountonly'] ) && $action != 'new-account' ) {
				return false;
			}
			if ( !isset( $this->mParams['noedit'] ) && $action == 'edit' ) {
				return false;
			}
			if ( isset( $this->mParams['reupload'] ) && $action == 'upload' ) {
				// Special:Upload also checks 'create' permissions when not reuploading
				return false;
			}
			return true;
		}
		return false;
	}

	/**
	 * Create a new TitleBlacklistEntry from a line of text
	 *
	 * @param $line String containing a line of blacklist text
	 * @return TitleBlacklistEntry
	 */
	public static function newFromString( $line, $source ) {
		$raw = $line; // Keep line for raw data
		$options = array();
		// Strip comments
		$line = preg_replace( "/^\\s*([^#]*)\\s*((.*)?)$/", "\\1", $line );
		$line = trim( $line );
		// Parse the rest of message
		preg_match( '/^(.*?)(\s*<([^<>]*)>)?$/', $line, $pockets );
		@list( $full, $regex, $null, $opts_str ) = $pockets;
		$regex = trim( $regex );
		$regex = str_replace( '_', ' ', $regex ); // We'll be matching against text form
		$opts_str = trim( $opts_str );
		// Parse opts
		$opts = preg_split( '/\s*\|\s*/', $opts_str );
		foreach ( $opts as $opt ) {
			$opt2 = strtolower( $opt );
			if ( $opt2 == 'autoconfirmed' ) {
				$options['autoconfirmed'] = true;
			}
			if ( $opt2 == 'moveonly' ) {
				$options['moveonly'] = true;
			}
			if ( $opt2 == 'newaccountonly' ) {
				$options['newaccountonly'] = true;
			}
			if ( $opt2 == 'noedit' ) {
				$options['noedit'] = true;
			}
			if ( $opt2 == 'casesensitive' ) {
				$options['casesensitive'] = true;
			}
			if ( $opt2 == 'reupload' ) {
				$options['reupload'] = true;
			}
			if ( preg_match( '/errmsg\s*=\s*(.+)/i', $opt, $matches ) ) {
				$options['errmsg'] = $matches[1];
			}
			if ( $opt2 == 'antispoof' ) {
				$options['antispoof'] = true;
			}
		}
		// Process magic words
		preg_match_all( '/{{\s*([a-z]+)\s*:\s*(.+?)\s*}}/', $regex, $magicwords, PREG_SET_ORDER );
		foreach ( $magicwords as $mword ) {
			global $wgParser;	// Functions we're calling don't need, nevertheless let's use it
			switch( strtolower( $mword[1] ) ) {
				case 'ns':
					$cpf_result = CoreParserFunctions::ns( $wgParser, $mword[2] );
					if ( is_string( $cpf_result ) ) {
						$regex = str_replace( $mword[0], $cpf_result, $regex );	// All result will have the same value, so we can just use str_seplace()
					}
					break;
				case 'int':
					$cpf_result = wfMessage( $mword[2] )->inContentLanguage()->text();
					if ( is_string( $cpf_result ) ) {
						$regex = str_replace( $mword[0], $cpf_result, $regex );
					}
			}
		}
		// Return result
		if( $regex ) {
			return new TitleBlacklistEntry( $regex, $options, $raw, $source );
		} else {
			return null;
		}
	}

	/**
	 * @return string This entry's regular expression
	 */
	public function getRegex() {
		return $this->mRegex;
	}

	/**
	 * @return string This entry's raw line
	 */
	public function getRaw() {
		return $this->mRaw;
	}

	/**
	 * @return array This entry's parameters
	 */
	public function getParams() {
		return $this->mParams;
	}

	/**
	 * @return string Custom message for this entry
	 */
	public function getCustomMessage() {
		return isset( $this->mParams['errmsg'] ) ? $this->mParams['errmsg'] : null;
	}

	/**
	 * @return string The format version
	 */
	public function getFormatVersion() { return $this->mFormatVersion; }

	/**
	 * Set the format version
	 *
	 * @param $v string New version to set
	 */
	public function setFormatVersion( $v ) { $this->mFormatVersion = $v; }

	/**
	 * Return the error message name for the blacklist entry.
	 *
	 * @param $operation string Operation name (as in titleblacklist-forbidden message name)
	 *
	 * @return string The error message name
	 */
	public function getErrorMessage( $operation ) {
		$message = $this->getCustomMessage();
		return $message ? $message : "titleblacklist-forbidden-{$operation}";
	}
}

//@}