summaryrefslogtreecommitdiff
path: root/includes/UserMailer.php
blob: 01e7132d20506d0d2110525b64483e55147a4db6 (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
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
<?php
/**
 * Classes used to send e-mails
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 * @author <brion@pobox.com>
 * @author <mail@tgries.de>
 * @author Tim Starling
 */


/**
 * Stores a single person's name and email address.
 * These are passed in via the constructor, and will be returned in SMTP
 * header format when requested.
 */
class MailAddress {
	/**
	 * @param $address string|User string with an email address, or a User object
	 * @param $name String: human-readable name if a string address is given
	 * @param $realName String: human-readable real name if a string address is given
	 */
	function __construct( $address, $name = null, $realName = null ) {
		if ( is_object( $address ) && $address instanceof User ) {
			$this->address = $address->getEmail();
			$this->name = $address->getName();
			$this->realName = $address->getRealName();
		} else {
			$this->address = strval( $address );
			$this->name = strval( $name );
			$this->realName = strval( $realName );
		}
	}

	/**
	 * Return formatted and quoted address to insert into SMTP headers
	 * @return string
	 */
	function toString() {
		# PHP's mail() implementation under Windows is somewhat shite, and
		# can't handle "Joe Bloggs <joe@bloggs.com>" format email addresses,
		# so don't bother generating them
		if ( $this->address ) {
			if ( $this->name != '' && !wfIsWindows() ) {
				global $wgEnotifUseRealName;
				$name = ( $wgEnotifUseRealName && $this->realName ) ? $this->realName : $this->name;
				$quoted = UserMailer::quotedPrintable( $name );
				if ( strpos( $quoted, '.' ) !== false || strpos( $quoted, ',' ) !== false ) {
					$quoted = '"' . $quoted . '"';
				}
				return "$quoted <{$this->address}>";
			} else {
				return $this->address;
			}
		} else {
			return "";
		}
	}

	function __toString() {
		return $this->toString();
	}
}


/**
 * Collection of static functions for sending mail
 */
class UserMailer {
	static $mErrorString;

	/**
	 * Send mail using a PEAR mailer
	 *
	 * @param $mailer
	 * @param $dest
	 * @param $headers
	 * @param $body
	 *
	 * @return Status
	 */
	protected static function sendWithPear( $mailer, $dest, $headers, $body ) {
		$mailResult = $mailer->send( $dest, $headers, $body );

		# Based on the result return an error string,
		if ( PEAR::isError( $mailResult ) ) {
			wfDebug( "PEAR::Mail failed: " . $mailResult->getMessage() . "\n" );
			return Status::newFatal( 'pear-mail-error', $mailResult->getMessage() );
		} else {
			return Status::newGood();
		}
	}

	/**
	 * Creates a single string from an associative array
	 *
	 * @param $headers array Associative Array: keys are header field names,
	 *                 values are ... values.
	 * @param $endl String: The end of line character.  Defaults to "\n"
	 * @return String
	 */
	static function arrayToHeaderString( $headers, $endl = "\n" ) {
		$strings = array();
		foreach( $headers as $name => $value ) {
			$strings[] = "$name: $value";
		}
		return implode( $endl, $strings );
	}

	/**
	 * Create a value suitable for the MessageId Header
	 *
	 * @return String
	 */
	static function makeMsgId() {
		global $wgSMTP, $wgServer;

		$msgid = uniqid( wfWikiID() . ".", true ); /* true required for cygwin */
		if ( is_array($wgSMTP) && isset($wgSMTP['IDHost']) && $wgSMTP['IDHost'] ) {
			$domain = $wgSMTP['IDHost'];
		} else {
			$url = wfParseUrl($wgServer);
			$domain = $url['host'];
		}
		return "<$msgid@$domain>";
	}

	/**
	 * This function will perform a direct (authenticated) login to
	 * a SMTP Server to use for mail relaying if 'wgSMTP' specifies an
	 * array of parameters. It requires PEAR:Mail to do that.
	 * Otherwise it just uses the standard PHP 'mail' function.
	 *
	 * @param $to MailAddress: recipient's email (or an array of them)
	 * @param $from MailAddress: sender's email
	 * @param $subject String: email's subject.
	 * @param $body String: email's text.
	 * @param $replyto MailAddress: optional reply-to email (default: null).
	 * @param $contentType String: optional custom Content-Type (default: text/plain; charset=UTF-8)
	 * @return Status object
	 */
	public static function send( $to, $from, $subject, $body, $replyto = null, $contentType = 'text/plain; charset=UTF-8' ) {
		global $wgSMTP, $wgEnotifMaxRecips, $wgAdditionalMailParams;

		if ( !is_array( $to ) ) {
			$to = array( $to );
		}

		wfDebug( __METHOD__ . ': sending mail to ' . implode( ', ', $to ) . "\n" );

		# Make sure we have at least one address
		$has_address = false;
		foreach ( $to as $u ) {
			if ( $u->address ) {
				$has_address = true;
				break;
			}
		}
		if ( !$has_address ) {
			return Status::newFatal( 'user-mail-no-addy' );
		}

		# Forge email headers
		# -------------------
		#
		# WARNING
		#
		# DO NOT add To: or Subject: headers at this step. They need to be
		# handled differently depending upon the mailer we are going to use.
		#
		# To:
		#  PHP mail() first argument is the mail receiver. The argument is
		#  used as a recipient destination and as a To header.
		#
		#  PEAR mailer has a recipient argument which is only used to
		#  send the mail. If no To header is given, PEAR will set it to
		#  to 'undisclosed-recipients:'.
		#
		#  NOTE: To: is for presentation, the actual recipient is specified
		#  by the mailer using the Rcpt-To: header.
		#
		# Subject: 
		#  PHP mail() second argument to pass the subject, passing a Subject
		#  as an additional header will result in a duplicate header.
		#
		#  PEAR mailer should be passed a Subject header.
		#
		# -- hashar 20120218

		$headers['From'] = $from->toString();
		$headers['Return-Path'] = $from->address;

		if ( $replyto ) {
			$headers['Reply-To'] = $replyto->toString();
		}

		$headers['Date'] = date( 'r' );
		$headers['MIME-Version'] = '1.0';
		$headers['Content-type'] = ( is_null( $contentType ) ?
			'text/plain; charset=UTF-8' : $contentType );
		$headers['Content-transfer-encoding'] = '8bit';

		$headers['Message-ID'] = self::makeMsgId();
		$headers['X-Mailer'] = 'MediaWiki mailer';

		$ret = wfRunHooks( 'AlternateUserMailer', array( $headers, $to, $from, $subject, $body ) );
		if ( $ret === false ) {
			return Status::newGood();
		} elseif ( $ret !== true ) {
			return Status::newFatal( 'php-mail-error', $ret );
		}

		if ( is_array( $wgSMTP ) ) {
			#
			# PEAR MAILER
			# 

			if ( function_exists( 'stream_resolve_include_path' ) ) {
				$found = stream_resolve_include_path( 'Mail.php' );
			} else {
				$found = Fallback::stream_resolve_include_path( 'Mail.php' );
			}
			if ( !$found ) {
				throw new MWException( 'PEAR mail package is not installed' );
			}
			require_once( 'Mail.php' );

			wfSuppressWarnings();

			// Create the mail object using the Mail::factory method
			$mail_object =& Mail::factory( 'smtp', $wgSMTP );
			if ( PEAR::isError( $mail_object ) ) {
				wfDebug( "PEAR::Mail factory failed: " . $mail_object->getMessage() . "\n" );
				wfRestoreWarnings();
				return Status::newFatal( 'pear-mail-error', $mail_object->getMessage() );
			}

			wfDebug( "Sending mail via PEAR::Mail\n" );

			$headers['Subject'] = self::quotedPrintable( $subject );

			# When sending only to one recipient, shows it its email using To:
			if ( count( $to ) == 1 ) {
				$headers['To'] = $to[0]->toString();
			}

			# Split jobs since SMTP servers tends to limit the maximum
			# number of possible recipients.	
			$chunks = array_chunk( $to, $wgEnotifMaxRecips );
			foreach ( $chunks as $chunk ) {
				$status = self::sendWithPear( $mail_object, $chunk, $headers, $body );
				# FIXME : some chunks might be sent while others are not!
				if ( !$status->isOK() ) {
					wfRestoreWarnings();
					return $status;
				}
			}
			wfRestoreWarnings();
			return Status::newGood();
		} else	{
			# 
			# PHP mail()
			#

			# Line endings need to be different on Unix and Windows due to
			# the bug described at http://trac.wordpress.org/ticket/2603
			if ( wfIsWindows() ) {
				$body = str_replace( "\n", "\r\n", $body );
				$endl = "\r\n";
			} else {
				$endl = "\n";
			}

			if( count($to) > 1 ) {
				$headers['To'] = 'undisclosed-recipients:;';
			}
			$headers = self::arrayToHeaderString( $headers, $endl );

			wfDebug( "Sending mail via internal mail() function\n" );

			self::$mErrorString = '';
			$html_errors = ini_get( 'html_errors' );
			ini_set( 'html_errors', '0' );
			set_error_handler( 'UserMailer::errorHandler' );

			$safeMode = wfIniGetBool( 'safe_mode' );
			foreach ( $to as $recip ) {
				if ( $safeMode ) {
					$sent = mail( $recip, self::quotedPrintable( $subject ), $body, $headers );
				} else {
					$sent = mail( $recip, self::quotedPrintable( $subject ), $body, $headers, $wgAdditionalMailParams );
				}
			}

			restore_error_handler();
			ini_set( 'html_errors', $html_errors );

			if ( self::$mErrorString ) {
				wfDebug( "Error sending mail: " . self::$mErrorString . "\n" );
				return Status::newFatal( 'php-mail-error', self::$mErrorString );
			} elseif ( ! $sent ) {
				// mail function only tells if there's an error
				wfDebug( "Unknown error sending mail\n" );
				return Status::newFatal( 'php-mail-error-unknown' );
			} else {
				return Status::newGood();
			}
		}
	}

	/**
	 * Set the mail error message in self::$mErrorString
	 *
	 * @param $code Integer: error number
	 * @param $string String: error message
	 */
	static function errorHandler( $code, $string ) {
		self::$mErrorString = preg_replace( '/^mail\(\)(\s*\[.*?\])?: /', '', $string );
	}

	/**
	 * Converts a string into a valid RFC 822 "phrase", such as is used for the sender name
	 * @param $phrase string
	 * @return string
	 */
	public static function rfc822Phrase( $phrase ) {
		$phrase = strtr( $phrase, array( "\r" => '', "\n" => '', '"' => '' ) );
		return '"' . $phrase . '"';
	}

	/**
	 * Converts a string into quoted-printable format
	 * @since 1.17
	 * @return string
	 */
	public static function quotedPrintable( $string, $charset = '' ) {
		# Probably incomplete; see RFC 2045
		if( empty( $charset ) ) {
			$charset = 'UTF-8';
		}
		$charset = strtoupper( $charset );
		$charset = str_replace( 'ISO-8859', 'ISO8859', $charset ); // ?

		$illegal = '\x00-\x08\x0b\x0c\x0e-\x1f\x7f-\xff=';
		$replace = $illegal . '\t ?_';
		if( !preg_match( "/[$illegal]/", $string ) ) {
			return $string;
		}
		$out = "=?$charset?Q?";
		$out .= preg_replace_callback( "/([$replace])/",
			array( __CLASS__, 'quotedPrintableCallback' ), $string );
		$out .= '?=';
		return $out;
	}

	protected static function quotedPrintableCallback( $matches ) {
		return sprintf( "=%02X", ord( $matches[1] ) );
	}
}

/**
 * This module processes the email notifications when the current page is
 * changed. It looks up the table watchlist to find out which users are watching
 * that page.
 *
 * The current implementation sends independent emails to each watching user for
 * the following reason:
 *
 * - Each watching user will be notified about the page edit time expressed in
 * his/her local time (UTC is shown additionally). To achieve this, we need to
 * find the individual timeoffset of each watching user from the preferences..
 *
 * Suggested improvement to slack down the number of sent emails: We could think
 * of sending out bulk mails (bcc:user1,user2...) for all these users having the
 * same timeoffset in their preferences.
 *
 * Visit the documentation pages under http://meta.wikipedia.com/Enotif
 *
 *
 */
class EmailNotification {
	protected $subject, $body, $replyto, $from;
	protected $timestamp, $summary, $minorEdit, $oldid, $composed_common;
	protected $mailTargets = array();

	/**
	 * @var Title
	 */
	protected $title;

	/**
	 * @var User
	 */
	protected $editor;

	/**
	 * Send emails corresponding to the user $editor editing the page $title.
	 * Also updates wl_notificationtimestamp.
	 *
	 * May be deferred via the job queue.
	 *
	 * @param $editor User object
	 * @param $title Title object
	 * @param $timestamp
	 * @param $summary
	 * @param $minorEdit
	 * @param $oldid (default: false)
	 */
	public function notifyOnPageChange( $editor, $title, $timestamp, $summary, $minorEdit, $oldid = false ) {
		global $wgEnotifUseJobQ, $wgEnotifWatchlist, $wgShowUpdatedMarker, $wgEnotifMinorEdits,
			$wgUsersNotifiedOnAllChanges, $wgEnotifUserTalk;

		if ( $title->getNamespace() < 0 ) {
			return;
		}

		// Build a list of users to notfiy
		$watchers = array();
		if ( $wgEnotifWatchlist || $wgShowUpdatedMarker ) {
			$dbw = wfGetDB( DB_MASTER );
			$res = $dbw->select( array( 'watchlist' ),
				array( 'wl_user' ),
				array(
					'wl_user != ' . intval( $editor->getID() ),
					'wl_namespace' => $title->getNamespace(),
					'wl_title' => $title->getDBkey(),
					'wl_notificationtimestamp IS NULL',
				), __METHOD__
			);
			foreach ( $res as $row ) {
				$watchers[] = intval( $row->wl_user );
			}
			if ( $watchers ) {
				// Update wl_notificationtimestamp for all watching users except
				// the editor
				$dbw->begin( __METHOD__ );
				$dbw->update( 'watchlist',
					array( /* SET */
						'wl_notificationtimestamp' => $dbw->timestamp( $timestamp )
					), array( /* WHERE */
						'wl_user' => $watchers,
						'wl_namespace' => $title->getNamespace(),
						'wl_title' => $title->getDBkey(),
					), __METHOD__
				);
				$dbw->commit( __METHOD__ );
			}
		}

		$sendEmail = true;
		// If nobody is watching the page, and there are no users notified on all changes
		// don't bother creating a job/trying to send emails
		// $watchers deals with $wgEnotifWatchlist
		if ( !count( $watchers ) && !count( $wgUsersNotifiedOnAllChanges ) ) {
			$sendEmail = false;
			// Only send notification for non minor edits, unless $wgEnotifMinorEdits
			if ( !$minorEdit || ( $wgEnotifMinorEdits && !$editor->isAllowed( 'nominornewtalk' ) ) ) {
				$isUserTalkPage = ( $title->getNamespace() == NS_USER_TALK );
				if ( $wgEnotifUserTalk && $isUserTalkPage && $this->canSendUserTalkEmail( $editor, $title, $minorEdit ) ) {
					$sendEmail = true;
				}
			}
		}

		if ( !$sendEmail ) {
			return;
		}
		if ( $wgEnotifUseJobQ ) {
			$params = array(
				'editor' => $editor->getName(),
				'editorID' => $editor->getID(),
				'timestamp' => $timestamp,
				'summary' => $summary,
				'minorEdit' => $minorEdit,
				'oldid' => $oldid,
				'watchers' => $watchers
			);
			$job = new EnotifNotifyJob( $title, $params );
			$job->insert();
		} else {
			$this->actuallyNotifyOnPageChange( $editor, $title, $timestamp, $summary, $minorEdit, $oldid, $watchers );
		}
	}

	/**
	 * Immediate version of notifyOnPageChange().
	 *
	 * Send emails corresponding to the user $editor editing the page $title.
	 * Also updates wl_notificationtimestamp.
	 *
	 * @param $editor User object
	 * @param $title Title object
	 * @param $timestamp string Edit timestamp
	 * @param $summary string Edit summary
	 * @param $minorEdit bool
	 * @param $oldid int Revision ID
	 * @param $watchers array of user IDs
	 */
	public function actuallyNotifyOnPageChange( $editor, $title, $timestamp, $summary, $minorEdit, $oldid, $watchers ) {
		# we use $wgPasswordSender as sender's address
		global $wgEnotifWatchlist;
		global $wgEnotifMinorEdits, $wgEnotifUserTalk;

		wfProfileIn( __METHOD__ );

		# The following code is only run, if several conditions are met:
		# 1. EmailNotification for pages (other than user_talk pages) must be enabled
		# 2. minor edits (changes) are only regarded if the global flag indicates so

		$isUserTalkPage = ( $title->getNamespace() == NS_USER_TALK );

		$this->title = $title;
		$this->timestamp = $timestamp;
		$this->summary = $summary;
		$this->minorEdit = $minorEdit;
		$this->oldid = $oldid;
		$this->editor = $editor;
		$this->composed_common = false;

		$userTalkId = false;

		if ( !$minorEdit || ( $wgEnotifMinorEdits && !$editor->isAllowed( 'nominornewtalk' ) ) ) {

			if ( $wgEnotifUserTalk && $isUserTalkPage && $this->canSendUserTalkEmail( $editor, $title, $minorEdit ) ) {
				$targetUser = User::newFromName( $title->getText() );
				$this->compose( $targetUser );
				$userTalkId = $targetUser->getId();
			}

			if ( $wgEnotifWatchlist ) {
				// Send updates to watchers other than the current editor
				$userArray = UserArray::newFromIDs( $watchers );
				foreach ( $userArray as $watchingUser ) {
					if ( $watchingUser->getOption( 'enotifwatchlistpages' ) &&
						( !$minorEdit || $watchingUser->getOption( 'enotifminoredits' ) ) &&
						$watchingUser->isEmailConfirmed() &&
						$watchingUser->getID() != $userTalkId )
					{
						$this->compose( $watchingUser );
					}
				}
			}
		}

		global $wgUsersNotifiedOnAllChanges;
		foreach ( $wgUsersNotifiedOnAllChanges as $name ) {
			if ( $editor->getName() == $name ) {
				// No point notifying the user that actually made the change!
				continue;
			}
			$user = User::newFromName( $name );
			$this->compose( $user );
		}

		$this->sendMails();
		wfProfileOut( __METHOD__ );
	}

	/**
	 * @param $editor User
	 * @param $title Title bool
	 * @param $minorEdit
	 * @return bool
	 */
	private function canSendUserTalkEmail( $editor, $title, $minorEdit ) {
		global $wgEnotifUserTalk;
		$isUserTalkPage = ( $title->getNamespace() == NS_USER_TALK );

		if ( $wgEnotifUserTalk && $isUserTalkPage ) {
			$targetUser = User::newFromName( $title->getText() );

			if ( !$targetUser || $targetUser->isAnon() ) {
				wfDebug( __METHOD__ . ": user talk page edited, but user does not exist\n" );
			} elseif ( $targetUser->getId() == $editor->getId() ) {
				wfDebug( __METHOD__ . ": user edited their own talk page, no notification sent\n" );
			} elseif ( $targetUser->getOption( 'enotifusertalkpages' ) &&
				( !$minorEdit || $targetUser->getOption( 'enotifminoredits' ) ) )
			{
				if ( $targetUser->isEmailConfirmed() ) {
					wfDebug( __METHOD__ . ": sending talk page update notification\n" );
					return true;
				} else {
					wfDebug( __METHOD__ . ": talk page owner doesn't have validated email\n" );
				}
			} else {
				wfDebug( __METHOD__ . ": talk page owner doesn't want notifications\n" );
			}
		}
		return false;
	}

	/**
	 * Generate the generic "this page has been changed" e-mail text.
	 */
	private function composeCommonMailtext() {
		global $wgPasswordSender, $wgPasswordSenderName, $wgNoReplyAddress;
		global $wgEnotifFromEditor, $wgEnotifRevealEditorAddress;
		global $wgEnotifImpersonal, $wgEnotifUseRealName;

		$this->composed_common = true;

		# You as the WikiAdmin and Sysops can make use of plenty of
		# named variables when composing your notification emails while
		# simply editing the Meta pages

		$keys = array();
		$postTransformKeys = array();

		if ( $this->oldid ) {
			// Always show a link to the diff which triggered the mail. See bug 32210.
			$keys['$NEWPAGE'] = wfMessage( 'enotif_lastdiff',
				$this->title->getCanonicalUrl( 'diff=next&oldid=' . $this->oldid ) )
				->inContentLanguage()->text();
			if ( !$wgEnotifImpersonal ) {
				// For personal mail, also show a link to the diff of all changes
				// since last visited.
				$keys['$NEWPAGE'] .= " \n" . wfMessage( 'enotif_lastvisited',
					$this->title->getCanonicalUrl( 'diff=0&oldid=' . $this->oldid ) )
					->inContentLanguage()->text();
			}
			$keys['$OLDID']   = $this->oldid;
			$keys['$CHANGEDORCREATED'] = wfMessage( 'changed' )->inContentLanguage()->text();
		} else {
			$keys['$NEWPAGE'] = wfMessage( 'enotif_newpagetext' )->inContentLanguage()->text();
			# clear $OLDID placeholder in the message template
			$keys['$OLDID']   = '';
			$keys['$CHANGEDORCREATED'] = wfMessage( 'created' )->inContentLanguage()->text();
		}

		$keys['$PAGETITLE'] = $this->title->getPrefixedText();
		$keys['$PAGETITLE_URL'] = $this->title->getCanonicalUrl();
		$keys['$PAGEMINOREDIT'] = $this->minorEdit ?
			wfMessage( 'minoredit' )->inContentLanguage()->text() : '';
		$keys['$UNWATCHURL'] = $this->title->getCanonicalUrl( 'action=unwatch' );

		if ( $this->editor->isAnon() ) {
			# real anon (user:xxx.xxx.xxx.xxx)
			$keys['$PAGEEDITOR'] = wfMessage( 'enotif_anon_editor', $this->editor->getName() )
				->inContentLanguage()->text();
			$keys['$PAGEEDITOR_EMAIL'] = wfMessage( 'noemailtitle' )->inContentLanguage()->text();
		} else {
			$keys['$PAGEEDITOR'] = $wgEnotifUseRealName ? $this->editor->getRealName() : $this->editor->getName();
			$emailPage = SpecialPage::getSafeTitleFor( 'Emailuser', $this->editor->getName() );
			$keys['$PAGEEDITOR_EMAIL'] = $emailPage->getCanonicalUrl();
		}

		$keys['$PAGEEDITOR_WIKI'] = $this->editor->getUserPage()->getCanonicalUrl();

		# Replace this after transforming the message, bug 35019
		$postTransformKeys['$PAGESUMMARY'] = $this->summary == '' ? ' - ' : $this->summary;

		# Now build message's subject and body

		$subject = wfMessage( 'enotif_subject' )->inContentLanguage()->plain();
		$subject = strtr( $subject, $keys );
		$subject = MessageCache::singleton()->transform( $subject, false, null, $this->title );
		$this->subject = strtr( $subject, $postTransformKeys );

		$body = wfMessage( 'enotif_body' )->inContentLanguage()->plain();
		$body = strtr( $body, $keys );
		$body = MessageCache::singleton()->transform( $body, false, null, $this->title );
		$this->body = wordwrap( strtr( $body, $postTransformKeys ), 72 );

		# Reveal the page editor's address as REPLY-TO address only if
		# the user has not opted-out and the option is enabled at the
		# global configuration level.
		$adminAddress = new MailAddress( $wgPasswordSender, $wgPasswordSenderName );
		if ( $wgEnotifRevealEditorAddress
			&& ( $this->editor->getEmail() != '' )
			&& $this->editor->getOption( 'enotifrevealaddr' ) )
		{
			$editorAddress = new MailAddress( $this->editor );
			if ( $wgEnotifFromEditor ) {
				$this->from    = $editorAddress;
			} else {
				$this->from    = $adminAddress;
				$this->replyto = $editorAddress;
			}
		} else {
			$this->from    = $adminAddress;
			$this->replyto = new MailAddress( $wgNoReplyAddress );
		}
	}

	/**
	 * Compose a mail to a given user and either queue it for sending, or send it now,
	 * depending on settings.
	 *
	 * Call sendMails() to send any mails that were queued.
	 * @param $user User
	 */
	function compose( $user ) {
		global $wgEnotifImpersonal;

		if ( !$this->composed_common )
			$this->composeCommonMailtext();

		if ( $wgEnotifImpersonal ) {
			$this->mailTargets[] = new MailAddress( $user );
		} else {
			$this->sendPersonalised( $user );
		}
	}

	/**
	 * Send any queued mails
	 */
	function sendMails() {
		global $wgEnotifImpersonal;
		if ( $wgEnotifImpersonal ) {
			$this->sendImpersonal( $this->mailTargets );
		}
	}

	/**
	 * Does the per-user customizations to a notification e-mail (name,
	 * timestamp in proper timezone, etc) and sends it out.
	 * Returns true if the mail was sent successfully.
	 *
	 * @param $watchingUser User object
	 * @return Boolean
	 * @private
	 */
	function sendPersonalised( $watchingUser ) {
		global $wgContLang, $wgEnotifUseRealName;
		// From the PHP manual:
		//     Note:  The to parameter cannot be an address in the form of "Something <someone@example.com>".
		//     The mail command will not parse this properly while talking with the MTA.
		$to = new MailAddress( $watchingUser );

		# $PAGEEDITDATE is the time and date of the page change
		# expressed in terms of individual local time of the notification
		# recipient, i.e. watching user
		$body = str_replace(
			array( '$WATCHINGUSERNAME',
				'$PAGEEDITDATE',
				'$PAGEEDITTIME' ),
			array( $wgEnotifUseRealName ? $watchingUser->getRealName() : $watchingUser->getName(),
				$wgContLang->userDate( $this->timestamp, $watchingUser ),
				$wgContLang->userTime( $this->timestamp, $watchingUser ) ),
			$this->body );

		return UserMailer::send( $to, $this->from, $this->subject, $body, $this->replyto );
	}

	/**
	 * Same as sendPersonalised but does impersonal mail suitable for bulk
	 * mailing.  Takes an array of MailAddress objects.
	 * @return Status
	 */
	function sendImpersonal( $addresses ) {
		global $wgContLang;

		if ( empty( $addresses ) )
			return;

		$body = str_replace(
				array( '$WATCHINGUSERNAME',
					'$PAGEEDITDATE',
					'$PAGEEDITTIME' ),
				array( wfMessage( 'enotif_impersonal_salutation' )->inContentLanguage()->text(),
					$wgContLang->date( $this->timestamp, false, false ),
					$wgContLang->time( $this->timestamp, false, false ) ),
				$this->body );

		return UserMailer::send( $addresses, $this->from, $this->subject, $body, $this->replyto );
	}

} # end of class EmailNotification