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