includes/changes/RecentChange.php

   1 <?php
   2 /**
   3  * Utility class for creating and accessing recent change entries.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * Utility class for creating new RC entries
  25  *
  26  * mAttribs:
  27  *  rc_id           id of the row in the recentchanges table
  28  *  rc_timestamp    time the entry was made
  29  *  rc_namespace    namespace #
  30  *  rc_title        non-prefixed db key
  31  *  rc_type         is new entry, used to determine whether updating is necessary
  32  *  rc_source       string representation of change source
  33  *  rc_minor        is minor
  34  *  rc_cur_id       page_id of associated page entry
  35  *  rc_user         user id who made the entry
  36  *  rc_user_text    user name who made the entry
  37  *  rc_comment      edit summary
  38  *  rc_this_oldid   rev_id associated with this entry (or zero)
  39  *  rc_last_oldid   rev_id associated with the entry before this one (or zero)
  40  *  rc_bot          is bot, hidden
  41  *  rc_ip           IP address of the user in dotted quad notation
  42  *  rc_new          obsolete, use rc_type==RC_NEW
  43  *  rc_patrolled    boolean whether or not someone has marked this edit as patrolled
  44  *  rc_old_len      integer byte length of the text before the edit
  45  *  rc_new_len      the same after the edit
  46  *  rc_deleted      partial deletion
  47  *  rc_logid        the log_id value for this log entry (or zero)
  48  *  rc_log_type     the log type (or null)
  49  *  rc_log_action   the log action (or null)
  50  *  rc_params       log params
  51  *
  52  * mExtra:
  53  *  prefixedDBkey   prefixed db key, used by external app via msg queue
  54  *  lastTimestamp   timestamp of previous entry, used in WHERE clause during update
  55  *  lang            the interwiki prefix, automatically set in save()
  56  *  oldSize         text size before the change
  57  *  newSize         text size after the change
  58  *  pageStatus      status of the page: created, deleted, moved, restored, changed
  59  *
  60  * temporary:       not stored in the database
  61  *      notificationtimestamp
  62  *      numberofWatchingusers
  63  *
  64  * @todo document functions and variables
  65  */
  66 class RecentChange {
  67
  68         // Constants for the rc_source field.  Extensions may also have
  69         // their own source constants.
  70         const SRC_EDIT = 'mw.edit';
  71         const SRC_NEW = 'mw.new';
  72         const SRC_LOG = 'mw.log';
  73         const SRC_EXTERNAL = 'mw.external'; // obsolete
  74
  75         var $mAttribs = array(), $mExtra = array();
  76
  77         /**
  78          * @var Title
  79          */
  80         var $mTitle = false;
  81
  82         /**
  83          * @var User
  84          */
  85         private $mPerformer = false;
  86
  87         /**
  88          * @var Title
  89          */
  90         var $mMovedToTitle = false;
  91         var $numberofWatchingusers = 0; # Dummy to prevent error message in SpecialRecentchangeslinked
  92         var $notificationtimestamp;
  93
  94         # Factory methods
  95
  96         /**
  97          * @param $row
  98          * @return RecentChange
  99          */
 100         public static function newFromRow( $row ) {
 101                 $rc = new RecentChange;
 102                 $rc->loadFromRow( $row );
 103
 104                 return $rc;
 105         }
 106
 107         /**
 108          * No uses left in Gerrit on 2013-11-19.
 109          * @deprecated in 1.22
 110          * @param $row
 111          * @return RecentChange
 112          */
 113         public static function newFromCurRow( $row ) {
 114                 wfDeprecated( __METHOD__, '1.22' );
 115                 $rc = new RecentChange;
 116                 $rc->loadFromCurRow( $row );
 117                 $rc->notificationtimestamp = false;
 118                 $rc->numberofWatchingusers = false;
 119
 120                 return $rc;
 121         }
 122
 123         /**
 124          * Obtain the recent change with a given rc_id value
 125          *
 126          * @param int $rcid rc_id value to retrieve
 127          * @return RecentChange
 128          */
 129         public static function newFromId( $rcid ) {
 130                 return self::newFromConds( array( 'rc_id' => $rcid ), __METHOD__ );
 131         }
 132
 133         /**
 134          * Find the first recent change matching some specific conditions
 135          *
 136          * @param array $conds of conditions
 137          * @param $fname Mixed: override the method name in profiling/logs
 138          * @param $options Array Query options
 139          * @return RecentChange
 140          */
 141         public static function newFromConds( $conds, $fname = __METHOD__, $options = array() ) {
 142                 $dbr = wfGetDB( DB_SLAVE );
 143                 $row = $dbr->selectRow( 'recentchanges', self::selectFields(), $conds, $fname, $options );
 144                 if ( $row !== false ) {
 145                         return self::newFromRow( $row );
 146                 } else {
 147                         return null;
 148                 }
 149         }
 150
 151         /**
 152          * Return the list of recentchanges fields that should be selected to create
 153          * a new recentchanges object.
 154          * @return array
 155          */
 156         public static function selectFields() {
 157                 return array(
 158                         'rc_id',
 159                         'rc_timestamp',
 160                         'rc_user',
 161                         'rc_user_text',
 162                         'rc_namespace',
 163                         'rc_title',
 164                         'rc_comment',
 165                         'rc_minor',
 166                         'rc_bot',
 167                         'rc_new',
 168                         'rc_cur_id',
 169                         'rc_this_oldid',
 170                         'rc_last_oldid',
 171                         'rc_type',
 172                         'rc_source',
 173                         'rc_patrolled',
 174                         'rc_ip',
 175                         'rc_old_len',
 176                         'rc_new_len',
 177                         'rc_deleted',
 178                         'rc_logid',
 179                         'rc_log_type',
 180                         'rc_log_action',
 181                         'rc_params',
 182                 );
 183         }
 184
 185         # Accessors
 186
 187         /**
 188          * @param $attribs array
 189          */
 190         public function setAttribs( $attribs ) {
 191                 $this->mAttribs = $attribs;
 192         }
 193
 194         /**
 195          * @param $extra array
 196          */
 197         public function setExtra( $extra ) {
 198                 $this->mExtra = $extra;
 199         }
 200
 201         /**
 202          *
 203          * @return Title
 204          */
 205         public function &getTitle() {
 206                 if ( $this->mTitle === false ) {
 207                         $this->mTitle = Title::makeTitle( $this->mAttribs['rc_namespace'], $this->mAttribs['rc_title'] );
 208                 }
 209
 210                 return $this->mTitle;
 211         }
 212
 213         /**
 214          * Get the User object of the person who performed this change.
 215          *
 216          * @return User
 217          */
 218         public function getPerformer() {
 219                 if ( $this->mPerformer === false ) {
 220                         if ( $this->mAttribs['rc_user'] ) {
 221                                 $this->mPerformer = User::newFromID( $this->mAttribs['rc_user'] );
 222                         } else {
 223                                 $this->mPerformer = User::newFromName( $this->mAttribs['rc_user_text'], false );
 224                         }
 225                 }
 226
 227                 return $this->mPerformer;
 228         }
 229
 230         /**
 231          * Writes the data in this object to the database
 232          * @param $noudp bool
 233          */
 234         public function save( $noudp = false ) {
 235                 global $wgLocalInterwiki, $wgPutIPinRC, $wgUseEnotif, $wgShowUpdatedMarker, $wgContLang;
 236
 237                 $dbw = wfGetDB( DB_MASTER );
 238                 if ( !is_array( $this->mExtra ) ) {
 239                         $this->mExtra = array();
 240                 }
 241                 $this->mExtra['lang'] = $wgLocalInterwiki;
 242
 243                 if ( !$wgPutIPinRC ) {
 244                         $this->mAttribs['rc_ip'] = '';
 245                 }
 246
 247                 # If our database is strict about IP addresses, use NULL instead of an empty string
 248                 if ( $dbw->strictIPs() and $this->mAttribs['rc_ip'] == '' ) {
 249                         unset( $this->mAttribs['rc_ip'] );
 250                 }
 251
 252                 # Trim spaces on user supplied text
 253                 $this->mAttribs['rc_comment'] = trim( $this->mAttribs['rc_comment'] );
 254
 255                 # Make sure summary is truncated (whole multibyte characters)
 256                 $this->mAttribs['rc_comment'] = $wgContLang->truncate( $this->mAttribs['rc_comment'], 255 );
 257
 258                 # Fixup database timestamps
 259                 $this->mAttribs['rc_timestamp'] = $dbw->timestamp( $this->mAttribs['rc_timestamp'] );
 260                 $this->mAttribs['rc_id'] = $dbw->nextSequenceValue( 'recentchanges_rc_id_seq' );
 261
 262                 ## If we are using foreign keys, an entry of 0 for the page_id will fail, so use NULL
 263                 if ( $dbw->cascadingDeletes() and $this->mAttribs['rc_cur_id'] == 0 ) {
 264                         unset( $this->mAttribs['rc_cur_id'] );
 265                 }
 266
 267                 # Insert new row
 268                 $dbw->insert( 'recentchanges', $this->mAttribs, __METHOD__ );
 269
 270                 # Set the ID
 271                 $this->mAttribs['rc_id'] = $dbw->insertId();
 272
 273                 # Notify extensions
 274                 wfRunHooks( 'RecentChange_save', array( &$this ) );
 275
 276                 # Notify external application via UDP
 277                 if ( !$noudp ) {
 278                         $this->notifyRCFeeds();
 279                 }
 280
 281                 # E-mail notifications
 282                 if ( $wgUseEnotif || $wgShowUpdatedMarker ) {
 283                         $editor = $this->getPerformer();
 284                         $title = $this->getTitle();
 285
 286                         if ( wfRunHooks( 'AbortEmailNotification', array( $editor, $title ) ) ) {
 287                                 # @todo FIXME: This would be better as an extension hook
 288                                 $enotif = new EmailNotification();
 289                                 $enotif->notifyOnPageChange( $editor, $title,
 290                                         $this->mAttribs['rc_timestamp'],
 291                                         $this->mAttribs['rc_comment'],
 292                                         $this->mAttribs['rc_minor'],
 293                                         $this->mAttribs['rc_last_oldid'],
 294                                         $this->mExtra['pageStatus'] );
 295                         }
 296                 }
 297         }
 298
 299         /**
 300          * @deprecated since 1.22, use notifyRCFeeds instead.
 301          */
 302         public function notifyRC2UDP() {
 303                 wfDeprecated( __METHOD__, '1.22' );
 304                 $this->notifyRCFeeds();
 305         }
 306
 307         /**
 308          * Send some text to UDP.
 309          * @deprecated since 1.22
 310          */
 311         public static function sendToUDP( $line, $address = '', $prefix = '', $port = '' ) {
 312                 global $wgRC2UDPAddress, $wgRC2UDPInterwikiPrefix, $wgRC2UDPPort, $wgRC2UDPPrefix;
 313
 314                 wfDeprecated( __METHOD__, '1.22' );
 315
 316                 # Assume default for standard RC case
 317                 $address = $address ? $address : $wgRC2UDPAddress;
 318                 $prefix = $prefix ? $prefix : $wgRC2UDPPrefix;
 319                 $port = $port ? $port : $wgRC2UDPPort;
 320
 321                 $engine = new UDPRCFeedEngine();
 322                 $feed = array(
 323                         'uri' => "udp://$address:$port/$prefix",
 324                         'formatter' => 'IRCColourfulRCFeedFormatter',
 325                         'add_interwiki_prefix' => $wgRC2UDPInterwikiPrefix,
 326                 );
 327
 328                 $engine->send( $feed, $line );
 329         }
 330
 331         /**
 332          * Notify all the feeds about the change.
 333          */
 334         public function notifyRCFeeds() {
 335                 global $wgRCFeeds;
 336
 337                 foreach ( $wgRCFeeds as $feed ) {
 338                         $engine = self::getEngine( $feed['uri'] );
 339
 340                         if ( isset( $this->mExtra['actionCommentIRC'] ) ) {
 341                                 $actionComment = $this->mExtra['actionCommentIRC'];
 342                         } else {
 343                                 $actionComment = null;
 344                         }
 345
 346                         $omitBots = isset( $feed['omit_bots'] ) ? $feed['omit_bots'] : false;
 347
 348                         if (
 349                                 ( $omitBots && $this->mAttribs['rc_bot'] ) ||
 350                                 $this->mAttribs['rc_type'] == RC_EXTERNAL
 351                         ) {
 352                                 continue;
 353                         }
 354
 355                         /** @var $formatter RCFeedFormatter */
 356                         $formatter = new $feed['formatter']();
 357                         $line = $formatter->getLine( $feed, $this, $actionComment );
 358
 359                         $engine->send( $feed, $line );
 360                 }
 361         }
 362
 363         /**
 364          * Gets the stream engine object for a given URI from $wgRCEngines
 365          *
 366          * @param string $uri URI to get the engine object for
 367          * @throws MWException
 368          * @return object The engine object
 369          */
 370         private static function getEngine( $uri ) {
 371                 global $wgRCEngines;
 372
 373                 $scheme = parse_url( $uri, PHP_URL_SCHEME );
 374                 if ( !$scheme ) {
 375                         throw new MWException( __FUNCTION__ . ": Invalid stream logger URI: '$uri'" );
 376                 }
 377
 378                 if ( !isset( $wgRCEngines[$scheme] ) ) {
 379                         throw new MWException( __FUNCTION__ . ": Unknown stream logger URI scheme: $scheme" );
 380                 }
 381
 382                 return new $wgRCEngines[$scheme];
 383         }
 384
 385         /**
 386          * @deprecated since 1.22, moved to IRCColourfulRCFeedFormatter
 387          */
 388         public static function cleanupForIRC( $text ) {
 389                 wfDeprecated( __METHOD__, '1.22' );
 390
 391                 return IRCColourfulRCFeedFormatter::cleanupForIRC( $text );
 392         }
 393
 394         /**
 395          * Mark a given change as patrolled
 396          *
 397          * @param $change Mixed: RecentChange or corresponding rc_id
 398          * @param $auto Boolean: for automatic patrol
 399          * @return Array See doMarkPatrolled(), or null if $change is not an existing rc_id
 400          */
 401         public static function markPatrolled( $change, $auto = false ) {
 402                 global $wgUser;
 403
 404                 $change = $change instanceof RecentChange
 405                         ? $change
 406                         : RecentChange::newFromId( $change );
 407
 408                 if ( !$change instanceof RecentChange ) {
 409                         return null;
 410                 }
 411
 412                 return $change->doMarkPatrolled( $wgUser, $auto );
 413         }
 414
 415         /**
 416          * Mark this RecentChange as patrolled
 417          *
 418          * NOTE: Can also return 'rcpatroldisabled', 'hookaborted' and
 419          * 'markedaspatrollederror-noautopatrol' as errors
 420          * @param $user User object doing the action
 421          * @param $auto Boolean: for automatic patrol
 422          * @return array of permissions errors, see Title::getUserPermissionsErrors()
 423          */
 424         public function doMarkPatrolled( User $user, $auto = false ) {
 425                 global $wgUseRCPatrol, $wgUseNPPatrol;
 426                 $errors = array();
 427                 // If recentchanges patrol is disabled, only new pages
 428                 // can be patrolled
 429                 if ( !$wgUseRCPatrol && ( !$wgUseNPPatrol || $this->getAttribute( 'rc_type' ) != RC_NEW ) ) {
 430                         $errors[] = array( 'rcpatroldisabled' );
 431                 }
 432                 // Automatic patrol needs "autopatrol", ordinary patrol needs "patrol"
 433                 $right = $auto ? 'autopatrol' : 'patrol';
 434                 $errors = array_merge( $errors, $this->getTitle()->getUserPermissionsErrors( $right, $user ) );
 435                 if ( !wfRunHooks( 'MarkPatrolled', array( $this->getAttribute( 'rc_id' ), &$user, false ) ) ) {
 436                         $errors[] = array( 'hookaborted' );
 437                 }
 438                 // Users without the 'autopatrol' right can't patrol their
 439                 // own revisions
 440                 if ( $user->getName() == $this->getAttribute( 'rc_user_text' )
 441                         && !$user->isAllowed( 'autopatrol' )
 442                 ) {
 443                         $errors[] = array( 'markedaspatrollederror-noautopatrol' );
 444                 }
 445                 if ( $errors ) {
 446                         return $errors;
 447                 }
 448                 // If the change was patrolled already, do nothing
 449                 if ( $this->getAttribute( 'rc_patrolled' ) ) {
 450                         return array();
 451                 }
 452                 // Actually set the 'patrolled' flag in RC
 453                 $this->reallyMarkPatrolled();
 454                 // Log this patrol event
 455                 PatrolLog::record( $this, $auto, $user );
 456                 wfRunHooks( 'MarkPatrolledComplete', array( $this->getAttribute( 'rc_id' ), &$user, false ) );
 457
 458                 return array();
 459         }
 460
 461         /**
 462          * Mark this RecentChange patrolled, without error checking
 463          * @return Integer: number of affected rows
 464          */
 465         public function reallyMarkPatrolled() {
 466                 $dbw = wfGetDB( DB_MASTER );
 467                 $dbw->update(
 468                         'recentchanges',
 469                         array(
 470                                 'rc_patrolled' => 1
 471                         ),
 472                         array(
 473                                 'rc_id' => $this->getAttribute( 'rc_id' )
 474                         ),
 475                         __METHOD__
 476                 );
 477                 // Invalidate the page cache after the page has been patrolled
 478                 // to make sure that the Patrol link isn't visible any longer!
 479                 $this->getTitle()->invalidateCache();
 480
 481                 return $dbw->affectedRows();
 482         }
 483
 484         /**
 485          * Makes an entry in the database corresponding to an edit
 486          *
 487          * @param $timestamp
 488          * @param $title Title
 489          * @param $minor
 490          * @param $user User
 491          * @param $comment
 492          * @param $oldId
 493          * @param $lastTimestamp
 494          * @param $bot
 495          * @param $ip string
 496          * @param $oldSize int
 497          * @param $newSize int
 498          * @param $newId int
 499          * @param $patrol int
 500          * @return RecentChange
 501          */
 502         public static function notifyEdit( $timestamp, &$title, $minor, &$user, $comment, $oldId,
 503                 $lastTimestamp, $bot, $ip = '', $oldSize = 0, $newSize = 0, $newId = 0, $patrol = 0 ) {
 504                 $rc = new RecentChange;
 505                 $rc->mTitle = $title;
 506                 $rc->mPerformer = $user;
 507                 $rc->mAttribs = array(
 508                         'rc_timestamp' => $timestamp,
 509                         'rc_namespace' => $title->getNamespace(),
 510                         'rc_title' => $title->getDBkey(),
 511                         'rc_type' => RC_EDIT,
 512                         'rc_source' => self::SRC_EDIT,
 513                         'rc_minor' => $minor ? 1 : 0,
 514                         'rc_cur_id' => $title->getArticleID(),
 515                         'rc_user' => $user->getId(),
 516                         'rc_user_text' => $user->getName(),
 517                         'rc_comment' => $comment,
 518                         'rc_this_oldid' => $newId,
 519                         'rc_last_oldid' => $oldId,
 520                         'rc_bot' => $bot ? 1 : 0,
 521                         'rc_ip' => self::checkIPAddress( $ip ),
 522                         'rc_patrolled' => intval( $patrol ),
 523                         'rc_new' => 0, # obsolete
 524                         'rc_old_len' => $oldSize,
 525                         'rc_new_len' => $newSize,
 526                         'rc_deleted' => 0,
 527                         'rc_logid' => 0,
 528                         'rc_log_type' => null,
 529                         'rc_log_action' => '',
 530                         'rc_params' => ''
 531                 );
 532
 533                 $rc->mExtra = array(
 534                         'prefixedDBkey' => $title->getPrefixedDBkey(),
 535                         'lastTimestamp' => $lastTimestamp,
 536                         'oldSize' => $oldSize,
 537                         'newSize' => $newSize,
 538                         'pageStatus' => 'changed'
 539                 );
 540                 $rc->save();
 541
 542                 return $rc;
 543         }
 544
 545         /**
 546          * Makes an entry in the database corresponding to page creation
 547          * Note: the title object must be loaded with the new id using resetArticleID()
 548          * @todo Document parameters and return
 549          *
 550          * @param $timestamp
 551          * @param $title Title
 552          * @param $minor
 553          * @param $user User
 554          * @param $comment
 555          * @param $bot
 556          * @param $ip string
 557          * @param $size int
 558          * @param $newId int
 559          * @param $patrol int
 560          * @return RecentChange
 561          */
 562         public static function notifyNew( $timestamp, &$title, $minor, &$user, $comment, $bot,
 563                 $ip = '', $size = 0, $newId = 0, $patrol = 0 ) {
 564                 $rc = new RecentChange;
 565                 $rc->mTitle = $title;
 566                 $rc->mPerformer = $user;
 567                 $rc->mAttribs = array(
 568                         'rc_timestamp' => $timestamp,
 569                         'rc_namespace' => $title->getNamespace(),
 570                         'rc_title' => $title->getDBkey(),
 571                         'rc_type' => RC_NEW,
 572                         'rc_source' => self::SRC_NEW,
 573                         'rc_minor' => $minor ? 1 : 0,
 574                         'rc_cur_id' => $title->getArticleID(),
 575                         'rc_user' => $user->getId(),
 576                         'rc_user_text' => $user->getName(),
 577                         'rc_comment' => $comment,
 578                         'rc_this_oldid' => $newId,
 579                         'rc_last_oldid' => 0,
 580                         'rc_bot' => $bot ? 1 : 0,
 581                         'rc_ip' => self::checkIPAddress( $ip ),
 582                         'rc_patrolled' => intval( $patrol ),
 583                         'rc_new' => 1, # obsolete
 584                         'rc_old_len' => 0,
 585                         'rc_new_len' => $size,
 586                         'rc_deleted' => 0,
 587                         'rc_logid' => 0,
 588                         'rc_log_type' => null,
 589                         'rc_log_action' => '',
 590                         'rc_params' => ''
 591                 );
 592
 593                 $rc->mExtra = array(
 594                         'prefixedDBkey' => $title->getPrefixedDBkey(),
 595                         'lastTimestamp' => 0,
 596                         'oldSize' => 0,
 597                         'newSize' => $size,
 598                         'pageStatus' => 'created'
 599                 );
 600                 $rc->save();
 601
 602                 return $rc;
 603         }
 604
 605         /**
 606          * @param $timestamp
 607          * @param $title
 608          * @param $user
 609          * @param $actionComment
 610          * @param $ip string
 611          * @param $type
 612          * @param $action
 613          * @param $target
 614          * @param $logComment
 615          * @param $params
 616          * @param $newId int
 617          * @param $actionCommentIRC string
 618          * @return bool
 619          */
 620         public static function notifyLog( $timestamp, &$title, &$user, $actionComment, $ip, $type,
 621                 $action, $target, $logComment, $params, $newId = 0, $actionCommentIRC = ''
 622         ) {
 623                 global $wgLogRestrictions;
 624
 625                 # Don't add private logs to RC!
 626                 if ( isset( $wgLogRestrictions[$type] ) && $wgLogRestrictions[$type] != '*' ) {
 627                         return false;
 628                 }
 629                 $rc = self::newLogEntry( $timestamp, $title, $user, $actionComment, $ip, $type, $action,
 630                         $target, $logComment, $params, $newId, $actionCommentIRC );
 631                 $rc->save();
 632
 633                 return true;
 634         }
 635
 636         /**
 637          * @param $timestamp
 638          * @param $title Title
 639          * @param $user User
 640          * @param $actionComment
 641          * @param $ip string
 642          * @param $type
 643          * @param $action
 644          * @param $target Title
 645          * @param $logComment
 646          * @param $params
 647          * @param $newId int
 648          * @param $actionCommentIRC string
 649          * @return RecentChange
 650          */
 651         public static function newLogEntry( $timestamp, &$title, &$user, $actionComment, $ip,
 652                 $type, $action, $target, $logComment, $params, $newId = 0, $actionCommentIRC = '' ) {
 653                 global $wgRequest;
 654
 655                 ## Get pageStatus for email notification
 656                 switch ( $type . '-' . $action ) {
 657                         case 'delete-delete':
 658                                 $pageStatus = 'deleted';
 659                                 break;
 660                         case 'move-move':
 661                         case 'move-move_redir':
 662                                 $pageStatus = 'moved';
 663                                 break;
 664                         case 'delete-restore':
 665                                 $pageStatus = 'restored';
 666                                 break;
 667                         case 'upload-upload':
 668                                 $pageStatus = 'created';
 669                                 break;
 670                         case 'upload-overwrite':
 671                         default:
 672                                 $pageStatus = 'changed';
 673                                 break;
 674                 }
 675
 676                 $rc = new RecentChange;
 677                 $rc->mTitle = $target;
 678                 $rc->mPerformer = $user;
 679                 $rc->mAttribs = array(
 680                         'rc_timestamp' => $timestamp,
 681                         'rc_namespace' => $target->getNamespace(),
 682                         'rc_title' => $target->getDBkey(),
 683                         'rc_type' => RC_LOG,
 684                         'rc_source' => self::SRC_LOG,
 685                         'rc_minor' => 0,
 686                         'rc_cur_id' => $target->getArticleID(),
 687                         'rc_user' => $user->getId(),
 688                         'rc_user_text' => $user->getName(),
 689                         'rc_comment' => $logComment,
 690                         'rc_this_oldid' => 0,
 691                         'rc_last_oldid' => 0,
 692                         'rc_bot' => $user->isAllowed( 'bot' ) ? $wgRequest->getBool( 'bot', true ) : 0,
 693                         'rc_ip' => self::checkIPAddress( $ip ),
 694                         'rc_patrolled' => 1,
 695                         'rc_new' => 0, # obsolete
 696                         'rc_old_len' => null,
 697                         'rc_new_len' => null,
 698                         'rc_deleted' => 0,
 699                         'rc_logid' => $newId,
 700                         'rc_log_type' => $type,
 701                         'rc_log_action' => $action,
 702                         'rc_params' => $params
 703                 );
 704
 705                 $rc->mExtra = array(
 706                         'prefixedDBkey' => $title->getPrefixedDBkey(),
 707                         'lastTimestamp' => 0,
 708                         'actionComment' => $actionComment, // the comment appended to the action, passed from LogPage
 709                         'pageStatus' => $pageStatus,
 710                         'actionCommentIRC' => $actionCommentIRC
 711                 );
 712
 713                 return $rc;
 714         }
 715
 716         /**
 717          * Initialises the members of this object from a mysql row object
 718          *
 719          * @param $row
 720          */
 721         public function loadFromRow( $row ) {
 722                 $this->mAttribs = get_object_vars( $row );
 723                 $this->mAttribs['rc_timestamp'] = wfTimestamp( TS_MW, $this->mAttribs['rc_timestamp'] );
 724                 $this->mAttribs['rc_deleted'] = $row->rc_deleted; // MUST be set
 725         }
 726
 727         /**
 728          * Makes a pseudo-RC entry from a cur row
 729          *
 730          * @deprecated in 1.22
 731          * @param $row
 732          */
 733         public function loadFromCurRow( $row ) {
 734                 wfDeprecated( __METHOD__, '1.22' );
 735                 $this->mAttribs = array(
 736                         'rc_timestamp' => wfTimestamp( TS_MW, $row->rev_timestamp ),
 737                         'rc_user' => $row->rev_user,
 738                         'rc_user_text' => $row->rev_user_text,
 739                         'rc_namespace' => $row->page_namespace,
 740                         'rc_title' => $row->page_title,
 741                         'rc_comment' => $row->rev_comment,
 742                         'rc_minor' => $row->rev_minor_edit ? 1 : 0,
 743                         'rc_type' => $row->page_is_new ? RC_NEW : RC_EDIT,
 744                         'rc_source' => $row->page_is_new ? self::SRC_NEW : self::SRC_EDIT,
 745                         'rc_cur_id' => $row->page_id,
 746                         'rc_this_oldid' => $row->rev_id,
 747                         'rc_last_oldid' => isset( $row->rc_last_oldid ) ? $row->rc_last_oldid : 0,
 748                         'rc_bot' => 0,
 749                         'rc_ip' => '',
 750                         'rc_id' => $row->rc_id,
 751                         'rc_patrolled' => $row->rc_patrolled,
 752                         'rc_new' => $row->page_is_new, # obsolete
 753                         'rc_old_len' => $row->rc_old_len,
 754                         'rc_new_len' => $row->rc_new_len,
 755                         'rc_params' => isset( $row->rc_params ) ? $row->rc_params : '',
 756                         'rc_log_type' => isset( $row->rc_log_type ) ? $row->rc_log_type : null,
 757                         'rc_log_action' => isset( $row->rc_log_action ) ? $row->rc_log_action : null,
 758                         'rc_logid' => isset( $row->rc_logid ) ? $row->rc_logid : 0,
 759                         'rc_deleted' => $row->rc_deleted // MUST be set
 760                 );
 761         }
 762
 763         /**
 764          * Get an attribute value
 765          *
 766          * @param string $name Attribute name
 767          * @return mixed
 768          */
 769         public function getAttribute( $name ) {
 770                 return isset( $this->mAttribs[$name] ) ? $this->mAttribs[$name] : null;
 771         }
 772
 773         /**
 774          * @return array
 775          */
 776         public function getAttributes() {
 777                 return $this->mAttribs;
 778         }
 779
 780         /**
 781          * Gets the end part of the diff URL associated with this object
 782          * Blank if no diff link should be displayed
 783          * @param $forceCur
 784          * @return string
 785          */
 786         public function diffLinkTrail( $forceCur ) {
 787                 if ( $this->mAttribs['rc_type'] == RC_EDIT ) {
 788                         $trail = "curid=" . (int)( $this->mAttribs['rc_cur_id'] ) .
 789                                 "&oldid=" . (int)( $this->mAttribs['rc_last_oldid'] );
 790                         if ( $forceCur ) {
 791                                 $trail .= '&diff=0';
 792                         } else {
 793                                 $trail .= '&diff=' . (int)( $this->mAttribs['rc_this_oldid'] );
 794                         }
 795                 } else {
 796                         $trail = '';
 797                 }
 798
 799                 return $trail;
 800         }
 801
 802         /**
 803          * Returns the change size (HTML).
 804          * The lengths can be given optionally.
 805          * @param $old int
 806          * @param $new int
 807          * @return string
 808          */
 809         public function getCharacterDifference( $old = 0, $new = 0 ) {
 810                 if ( $old === 0 ) {
 811                         $old = $this->mAttribs['rc_old_len'];
 812                 }
 813                 if ( $new === 0 ) {
 814                         $new = $this->mAttribs['rc_new_len'];
 815                 }
 816                 if ( $old === null || $new === null ) {
 817                         return '';
 818                 }
 819
 820                 return ChangesList::showCharacterDifference( $old, $new );
 821         }
 822
 823         /**
 824          * Purge expired changes from the recentchanges table
 825          * @since 1.22
 826          */
 827         public static function purgeExpiredChanges() {
 828                 if ( wfReadOnly() ) {
 829                         return;
 830                 }
 831
 832                 $method = __METHOD__;
 833                 $dbw = wfGetDB( DB_MASTER );
 834                 $dbw->onTransactionIdle( function () use ( $dbw, $method ) {
 835                         global $wgRCMaxAge;
 836
 837                         $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
 838                         $dbw->delete(
 839                                 'recentchanges',
 840                                 array( 'rc_timestamp < ' . $dbw->addQuotes( $cutoff ) ),
 841                                 $method
 842                         );
 843                 } );
 844         }
 845
 846         private static function checkIPAddress( $ip ) {
 847                 global $wgRequest;
 848                 if ( $ip ) {
 849                         if ( !IP::isIPAddress( $ip ) ) {
 850                                 throw new MWException( "Attempt to write \"" . $ip .
 851                                         "\" as an IP address into recent changes" );
 852                         }
 853                 } else {
 854                         $ip = $wgRequest->getIP();
 855                         if ( !$ip ) {
 856                                 $ip = '';
 857                         }
 858                 }
 859
 860                 return $ip;
 861         }
 862
 863         /**
 864          * Check whether the given timestamp is new enough to have a RC row with a given tolerance
 865          * as the recentchanges table might not be cleared out regularly (so older entries might exist)
 866          * or rows which will be deleted soon shouldn't be included.
 867          *
 868          * @param $timestamp mixed MWTimestamp compatible timestamp
 869          * @param $tolerance integer Tolerance in seconds
 870          * @return bool
 871          */
 872         public static function isInRCLifespan( $timestamp, $tolerance = 0 ) {
 873                 global $wgRCMaxAge;
 874
 875                 return wfTimestamp( TS_UNIX, $timestamp ) > time() - $tolerance - $wgRCMaxAge;
 876         }
 877 }