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  *  oldSize         text size before the change
  56  *  newSize         text size after the change
  57  *  pageStatus      status of the page: created, deleted, moved, restored, changed
  58  *
  59  * temporary:       not stored in the database
  60  *      notificationtimestamp
  61  *      numberofWatchingusers
  62  *
  63  * @todo Deprecate access to mAttribs (direct or via getAttributes). Right now
  64  *  we're having to include both rc_comment and rc_comment_text/rc_comment_data
  65  *  so random crap works right.
  66  */
  67 class RecentChange {
  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         const SRC_CATEGORIZE = 'mw.categorize';
  75
  76         public $mAttribs = [];
  77         public $mExtra = [];
  78
  79         /**
  80          * @var Title
  81          */
  82         public $mTitle = false;
  83
  84         /**
  85          * @var User
  86          */
  87         private $mPerformer = false;
  88
  89         public $numberofWatchingusers = 0; # Dummy to prevent error message in SpecialRecentChangesLinked
  90         public $notificationtimestamp;
  91
  92         /**
  93          * @var int Line number of recent change. Default -1.
  94          */
  95         public $counter = -1;
  96
  97         /**
  98          * @var array List of tags to apply
  99          */
 100         private $tags = [];
 101
 102         /**
 103          * @var array Array of change types
 104          */
 105         private static $changeTypes = [
 106                 'edit' => RC_EDIT,
 107                 'new' => RC_NEW,
 108                 'log' => RC_LOG,
 109                 'external' => RC_EXTERNAL,
 110                 'categorize' => RC_CATEGORIZE,
 111         ];
 112
 113         # Factory methods
 114
 115         /**
 116          * @param mixed $row
 117          * @return RecentChange
 118          */
 119         public static function newFromRow( $row ) {
 120                 $rc = new RecentChange;
 121                 $rc->loadFromRow( $row );
 122
 123                 return $rc;
 124         }
 125
 126         /**
 127          * Parsing text to RC_* constants
 128          * @since 1.24
 129          * @param string|array $type
 130          * @throws MWException
 131          * @return int|array RC_TYPE
 132          */
 133         public static function parseToRCType( $type ) {
 134                 if ( is_array( $type ) ) {
 135                         $retval = [];
 136                         foreach ( $type as $t ) {
 137                                 $retval[] = self::parseToRCType( $t );
 138                         }
 139
 140                         return $retval;
 141                 }
 142
 143                 if ( !array_key_exists( $type, self::$changeTypes ) ) {
 144                         throw new MWException( "Unknown type '$type'" );
 145                 }
 146                 return self::$changeTypes[$type];
 147         }
 148
 149         /**
 150          * Parsing RC_* constants to human-readable test
 151          * @since 1.24
 152          * @param int $rcType
 153          * @return string $type
 154          */
 155         public static function parseFromRCType( $rcType ) {
 156                 return array_search( $rcType, self::$changeTypes, true ) ?: "$rcType";
 157         }
 158
 159         /**
 160          * Get an array of all change types
 161          *
 162          * @since 1.26
 163          *
 164          * @return array
 165          */
 166         public static function getChangeTypes() {
 167                 return array_keys( self::$changeTypes );
 168         }
 169
 170         /**
 171          * Obtain the recent change with a given rc_id value
 172          *
 173          * @param int $rcid The rc_id value to retrieve
 174          * @return RecentChange|null
 175          */
 176         public static function newFromId( $rcid ) {
 177                 return self::newFromConds( [ 'rc_id' => $rcid ], __METHOD__ );
 178         }
 179
 180         /**
 181          * Find the first recent change matching some specific conditions
 182          *
 183          * @param array $conds Array of conditions
 184          * @param mixed $fname Override the method name in profiling/logs
 185          * @param int $dbType DB_* constant
 186          *
 187          * @return RecentChange|null
 188          */
 189         public static function newFromConds(
 190                 $conds,
 191                 $fname = __METHOD__,
 192                 $dbType = DB_REPLICA
 193         ) {
 194                 $db = wfGetDB( $dbType );
 195                 $row = $db->selectRow( 'recentchanges', self::selectFields(), $conds, $fname );
 196                 if ( $row !== false ) {
 197                         return self::newFromRow( $row );
 198                 } else {
 199                         return null;
 200                 }
 201         }
 202
 203         /**
 204          * Return the list of recentchanges fields that should be selected to create
 205          * a new recentchanges object.
 206          * @todo Deprecate this in favor of a method that returns tables and joins
 207          *  as well, and use CommentStore::getJoin().
 208          * @return array
 209          */
 210         public static function selectFields() {
 211                 return [
 212                         'rc_id',
 213                         'rc_timestamp',
 214                         'rc_user',
 215                         'rc_user_text',
 216                         'rc_namespace',
 217                         'rc_title',
 218                         'rc_minor',
 219                         'rc_bot',
 220                         'rc_new',
 221                         'rc_cur_id',
 222                         'rc_this_oldid',
 223                         'rc_last_oldid',
 224                         'rc_type',
 225                         'rc_source',
 226                         'rc_patrolled',
 227                         'rc_ip',
 228                         'rc_old_len',
 229                         'rc_new_len',
 230                         'rc_deleted',
 231                         'rc_logid',
 232                         'rc_log_type',
 233                         'rc_log_action',
 234                         'rc_params',
 235                 ] + CommentStore::newKey( 'rc_comment' )->getFields();
 236         }
 237
 238         # Accessors
 239
 240         /**
 241          * @param array $attribs
 242          */
 243         public function setAttribs( $attribs ) {
 244                 $this->mAttribs = $attribs;
 245         }
 246
 247         /**
 248          * @param array $extra
 249          */
 250         public function setExtra( $extra ) {
 251                 $this->mExtra = $extra;
 252         }
 253
 254         /**
 255          * @return Title
 256          */
 257         public function &getTitle() {
 258                 if ( $this->mTitle === false ) {
 259                         $this->mTitle = Title::makeTitle( $this->mAttribs['rc_namespace'], $this->mAttribs['rc_title'] );
 260                 }
 261
 262                 return $this->mTitle;
 263         }
 264
 265         /**
 266          * Get the User object of the person who performed this change.
 267          *
 268          * @return User
 269          */
 270         public function getPerformer() {
 271                 if ( $this->mPerformer === false ) {
 272                         if ( $this->mAttribs['rc_user'] ) {
 273                                 $this->mPerformer = User::newFromId( $this->mAttribs['rc_user'] );
 274                         } else {
 275                                 $this->mPerformer = User::newFromName( $this->mAttribs['rc_user_text'], false );
 276                         }
 277                 }
 278
 279                 return $this->mPerformer;
 280         }
 281
 282         /**
 283          * Writes the data in this object to the database
 284          * @param bool $noudp
 285          */
 286         public function save( $noudp = false ) {
 287                 global $wgPutIPinRC, $wgUseEnotif, $wgShowUpdatedMarker;
 288
 289                 $dbw = wfGetDB( DB_MASTER );
 290                 if ( !is_array( $this->mExtra ) ) {
 291                         $this->mExtra = [];
 292                 }
 293
 294                 if ( !$wgPutIPinRC ) {
 295                         $this->mAttribs['rc_ip'] = '';
 296                 }
 297
 298                 # Strict mode fixups (not-NULL fields)
 299                 foreach ( [ 'minor', 'bot', 'new', 'patrolled', 'deleted' ] as $field ) {
 300                         $this->mAttribs["rc_$field"] = (int)$this->mAttribs["rc_$field"];
 301                 }
 302                 # ...more fixups (NULL fields)
 303                 foreach ( [ 'old_len', 'new_len' ] as $field ) {
 304                         $this->mAttribs["rc_$field"] = isset( $this->mAttribs["rc_$field"] )
 305                                 ? (int)$this->mAttribs["rc_$field"]
 306                                 : null;
 307                 }
 308
 309                 # If our database is strict about IP addresses, use NULL instead of an empty string
 310                 $strictIPs = in_array( $dbw->getType(), [ 'oracle', 'postgres' ] ); // legacy
 311                 if ( $strictIPs && $this->mAttribs['rc_ip'] == '' ) {
 312                         unset( $this->mAttribs['rc_ip'] );
 313                 }
 314
 315                 # Trim spaces on user supplied text
 316                 $this->mAttribs['rc_comment'] = trim( $this->mAttribs['rc_comment'] );
 317
 318                 # Fixup database timestamps
 319                 $this->mAttribs['rc_timestamp'] = $dbw->timestamp( $this->mAttribs['rc_timestamp'] );
 320
 321                 # # If we are using foreign keys, an entry of 0 for the page_id will fail, so use NULL
 322                 if ( $this->mAttribs['rc_cur_id'] == 0 ) {
 323                         unset( $this->mAttribs['rc_cur_id'] );
 324                 }
 325
 326                 # Convert mAttribs['rc_comment'] for CommentStore
 327                 $row = $this->mAttribs;
 328                 $comment = $row['rc_comment'];
 329                 unset( $row['rc_comment'], $row['rc_comment_text'], $row['rc_comment_data'] );
 330                 $row += CommentStore::newKey( 'rc_comment' )->insert( $dbw, $comment );
 331
 332                 # Don't reuse an existing rc_id for the new row, if one happens to be
 333                 # set for some reason.
 334                 unset( $row['rc_id'] );
 335
 336                 # Insert new row
 337                 $dbw->insert( 'recentchanges', $row, __METHOD__ );
 338
 339                 # Set the ID
 340                 $this->mAttribs['rc_id'] = $dbw->insertId();
 341
 342                 # Notify extensions
 343                 // Avoid PHP 7.1 warning from passing $this by reference
 344                 $rc = $this;
 345                 Hooks::run( 'RecentChange_save', [ &$rc ] );
 346
 347                 if ( count( $this->tags ) ) {
 348                         ChangeTags::addTags( $this->tags, $this->mAttribs['rc_id'],
 349                                 $this->mAttribs['rc_this_oldid'], $this->mAttribs['rc_logid'], null, $this );
 350                 }
 351
 352                 # Notify external application via UDP
 353                 if ( !$noudp ) {
 354                         $this->notifyRCFeeds();
 355                 }
 356
 357                 # E-mail notifications
 358                 if ( $wgUseEnotif || $wgShowUpdatedMarker ) {
 359                         $editor = $this->getPerformer();
 360                         $title = $this->getTitle();
 361
 362                         // Never send an RC notification email about categorization changes
 363                         if (
 364                                 Hooks::run( 'AbortEmailNotification', [ $editor, $title, $this ] ) &&
 365                                 $this->mAttribs['rc_type'] != RC_CATEGORIZE
 366                         ) {
 367                                 // @FIXME: This would be better as an extension hook
 368                                 // Send emails or email jobs once this row is safely committed
 369                                 $dbw->onTransactionIdle(
 370                                         function () use ( $editor, $title ) {
 371                                                 $enotif = new EmailNotification();
 372                                                 $enotif->notifyOnPageChange(
 373                                                         $editor,
 374                                                         $title,
 375                                                         $this->mAttribs['rc_timestamp'],
 376                                                         $this->mAttribs['rc_comment'],
 377                                                         $this->mAttribs['rc_minor'],
 378                                                         $this->mAttribs['rc_last_oldid'],
 379                                                         $this->mExtra['pageStatus']
 380                                                 );
 381                                         },
 382                                         __METHOD__
 383                                 );
 384                         }
 385                 }
 386
 387                 // Update the cached list of active users
 388                 if ( $this->mAttribs['rc_user'] > 0 ) {
 389                         JobQueueGroup::singleton()->lazyPush( RecentChangesUpdateJob::newCacheUpdateJob() );
 390                 }
 391         }
 392
 393         /**
 394          * Notify all the feeds about the change.
 395          * @param array $feeds Optional feeds to send to, defaults to $wgRCFeeds
 396          */
 397         public function notifyRCFeeds( array $feeds = null ) {
 398                 global $wgRCFeeds;
 399                 if ( $feeds === null ) {
 400                         $feeds = $wgRCFeeds;
 401                 }
 402
 403                 $performer = $this->getPerformer();
 404
 405                 foreach ( $feeds as $params ) {
 406                         $params += [
 407                                 'omit_bots' => false,
 408                                 'omit_anon' => false,
 409                                 'omit_user' => false,
 410                                 'omit_minor' => false,
 411                                 'omit_patrolled' => false,
 412                         ];
 413
 414                         if (
 415                                 ( $params['omit_bots'] && $this->mAttribs['rc_bot'] ) ||
 416                                 ( $params['omit_anon'] && $performer->isAnon() ) ||
 417                                 ( $params['omit_user'] && !$performer->isAnon() ) ||
 418                                 ( $params['omit_minor'] && $this->mAttribs['rc_minor'] ) ||
 419                                 ( $params['omit_patrolled'] && $this->mAttribs['rc_patrolled'] ) ||
 420                                 $this->mAttribs['rc_type'] == RC_EXTERNAL
 421                         ) {
 422                                 continue;
 423                         }
 424
 425                         if ( isset( $this->mExtra['actionCommentIRC'] ) ) {
 426                                 $actionComment = $this->mExtra['actionCommentIRC'];
 427                         } else {
 428                                 $actionComment = null;
 429                         }
 430
 431                         $feed = RCFeed::factory( $params );
 432                         $feed->notify( $this, $actionComment );
 433                 }
 434         }
 435
 436         /**
 437          * @since 1.22
 438          * @deprecated since 1.29 Use RCFeed::factory() instead
 439          * @param string $uri URI to get the engine object for
 440          * @param array $params
 441          * @return RCFeedEngine The engine object
 442          * @throws MWException
 443          */
 444         public static function getEngine( $uri, $params = [] ) {
 445                 // TODO: Merge into RCFeed::factory().
 446                 global $wgRCEngines;
 447                 $scheme = parse_url( $uri, PHP_URL_SCHEME );
 448                 if ( !$scheme ) {
 449                         throw new MWException( "Invalid RCFeed uri: '$uri'" );
 450                 }
 451                 if ( !isset( $wgRCEngines[$scheme] ) ) {
 452                         throw new MWException( "Unknown RCFeedEngine scheme: '$scheme'" );
 453                 }
 454                 if ( defined( 'MW_PHPUNIT_TEST' ) && is_object( $wgRCEngines[$scheme] ) ) {
 455                         return $wgRCEngines[$scheme];
 456                 }
 457                 return new $wgRCEngines[$scheme]( $params );
 458         }
 459
 460         /**
 461          * Mark a given change as patrolled
 462          *
 463          * @param RecentChange|int $change RecentChange or corresponding rc_id
 464          * @param bool $auto For automatic patrol
 465          * @param string|string[] $tags Change tags to add to the patrol log entry
 466          *   ($user should be able to add the specified tags before this is called)
 467          * @return array See doMarkPatrolled(), or null if $change is not an existing rc_id
 468          */
 469         public static function markPatrolled( $change, $auto = false, $tags = null ) {
 470                 global $wgUser;
 471
 472                 $change = $change instanceof RecentChange
 473                         ? $change
 474                         : self::newFromId( $change );
 475
 476                 if ( !$change instanceof RecentChange ) {
 477                         return null;
 478                 }
 479
 480                 return $change->doMarkPatrolled( $wgUser, $auto, $tags );
 481         }
 482
 483         /**
 484          * Mark this RecentChange as patrolled
 485          *
 486          * NOTE: Can also return 'rcpatroldisabled', 'hookaborted' and
 487          * 'markedaspatrollederror-noautopatrol' as errors
 488          * @param User $user User object doing the action
 489          * @param bool $auto For automatic patrol
 490          * @param string|string[] $tags Change tags to add to the patrol log entry
 491          *   ($user should be able to add the specified tags before this is called)
 492          * @return array Array of permissions errors, see Title::getUserPermissionsErrors()
 493          */
 494         public function doMarkPatrolled( User $user, $auto = false, $tags = null ) {
 495                 global $wgUseRCPatrol, $wgUseNPPatrol, $wgUseFilePatrol;
 496
 497                 $errors = [];
 498                 // If recentchanges patrol is disabled, only new pages or new file versions
 499                 // can be patrolled, provided the appropriate config variable is set
 500                 if ( !$wgUseRCPatrol && ( !$wgUseNPPatrol || $this->getAttribute( 'rc_type' ) != RC_NEW ) &&
 501                         ( !$wgUseFilePatrol || !( $this->getAttribute( 'rc_type' ) == RC_LOG &&
 502                         $this->getAttribute( 'rc_log_type' ) == 'upload' ) ) ) {
 503                         $errors[] = [ 'rcpatroldisabled' ];
 504                 }
 505                 // Automatic patrol needs "autopatrol", ordinary patrol needs "patrol"
 506                 $right = $auto ? 'autopatrol' : 'patrol';
 507                 $errors = array_merge( $errors, $this->getTitle()->getUserPermissionsErrors( $right, $user ) );
 508                 if ( !Hooks::run( 'MarkPatrolled',
 509                                         [ $this->getAttribute( 'rc_id' ), &$user, false, $auto ] )
 510                 ) {
 511                         $errors[] = [ 'hookaborted' ];
 512                 }
 513                 // Users without the 'autopatrol' right can't patrol their
 514                 // own revisions
 515                 if ( $user->getName() === $this->getAttribute( 'rc_user_text' )
 516                         && !$user->isAllowed( 'autopatrol' )
 517                 ) {
 518                         $errors[] = [ 'markedaspatrollederror-noautopatrol' ];
 519                 }
 520                 if ( $errors ) {
 521                         return $errors;
 522                 }
 523                 // If the change was patrolled already, do nothing
 524                 if ( $this->getAttribute( 'rc_patrolled' ) ) {
 525                         return [];
 526                 }
 527                 // Actually set the 'patrolled' flag in RC
 528                 $this->reallyMarkPatrolled();
 529                 // Log this patrol event
 530                 PatrolLog::record( $this, $auto, $user, $tags );
 531
 532                 Hooks::run(
 533                         'MarkPatrolledComplete',
 534                         [ $this->getAttribute( 'rc_id' ), &$user, false, $auto ]
 535                 );
 536
 537                 return [];
 538         }
 539
 540         /**
 541          * Mark this RecentChange patrolled, without error checking
 542          * @return int Number of affected rows
 543          */
 544         public function reallyMarkPatrolled() {
 545                 $dbw = wfGetDB( DB_MASTER );
 546                 $dbw->update(
 547                         'recentchanges',
 548                         [
 549                                 'rc_patrolled' => 1
 550                         ],
 551                         [
 552                                 'rc_id' => $this->getAttribute( 'rc_id' )
 553                         ],
 554                         __METHOD__
 555                 );
 556                 // Invalidate the page cache after the page has been patrolled
 557                 // to make sure that the Patrol link isn't visible any longer!
 558                 $this->getTitle()->invalidateCache();
 559
 560                 return $dbw->affectedRows();
 561         }
 562
 563         /**
 564          * Makes an entry in the database corresponding to an edit
 565          *
 566          * @param string $timestamp
 567          * @param Title &$title
 568          * @param bool $minor
 569          * @param User &$user
 570          * @param string $comment
 571          * @param int $oldId
 572          * @param string $lastTimestamp
 573          * @param bool $bot
 574          * @param string $ip
 575          * @param int $oldSize
 576          * @param int $newSize
 577          * @param int $newId
 578          * @param int $patrol
 579          * @param array $tags
 580          * @return RecentChange
 581          */
 582         public static function notifyEdit(
 583                 $timestamp, &$title, $minor, &$user, $comment, $oldId, $lastTimestamp,
 584                 $bot, $ip = '', $oldSize = 0, $newSize = 0, $newId = 0, $patrol = 0,
 585                 $tags = []
 586         ) {
 587                 $rc = new RecentChange;
 588                 $rc->mTitle = $title;
 589                 $rc->mPerformer = $user;
 590                 $rc->mAttribs = [
 591                         'rc_timestamp' => $timestamp,
 592                         'rc_namespace' => $title->getNamespace(),
 593                         'rc_title' => $title->getDBkey(),
 594                         'rc_type' => RC_EDIT,
 595                         'rc_source' => self::SRC_EDIT,
 596                         'rc_minor' => $minor ? 1 : 0,
 597                         'rc_cur_id' => $title->getArticleID(),
 598                         'rc_user' => $user->getId(),
 599                         'rc_user_text' => $user->getName(),
 600                         'rc_comment' => &$comment,
 601                         'rc_comment_text' => &$comment,
 602                         'rc_comment_data' => null,
 603                         'rc_this_oldid' => $newId,
 604                         'rc_last_oldid' => $oldId,
 605                         'rc_bot' => $bot ? 1 : 0,
 606                         'rc_ip' => self::checkIPAddress( $ip ),
 607                         'rc_patrolled' => intval( $patrol ),
 608                         'rc_new' => 0, # obsolete
 609                         'rc_old_len' => $oldSize,
 610                         'rc_new_len' => $newSize,
 611                         'rc_deleted' => 0,
 612                         'rc_logid' => 0,
 613                         'rc_log_type' => null,
 614                         'rc_log_action' => '',
 615                         'rc_params' => ''
 616                 ];
 617
 618                 $rc->mExtra = [
 619                         'prefixedDBkey' => $title->getPrefixedDBkey(),
 620                         'lastTimestamp' => $lastTimestamp,
 621                         'oldSize' => $oldSize,
 622                         'newSize' => $newSize,
 623                         'pageStatus' => 'changed'
 624                 ];
 625
 626                 DeferredUpdates::addCallableUpdate(
 627                         function () use ( $rc, $tags ) {
 628                                 $rc->addTags( $tags );
 629                                 $rc->save();
 630                                 if ( $rc->mAttribs['rc_patrolled'] ) {
 631                                         PatrolLog::record( $rc, true, $rc->getPerformer() );
 632                                 }
 633                         },
 634                         DeferredUpdates::POSTSEND,
 635                         wfGetDB( DB_MASTER )
 636                 );
 637
 638                 return $rc;
 639         }
 640
 641         /**
 642          * Makes an entry in the database corresponding to page creation
 643          * Note: the title object must be loaded with the new id using resetArticleID()
 644          *
 645          * @param string $timestamp
 646          * @param Title &$title
 647          * @param bool $minor
 648          * @param User &$user
 649          * @param string $comment
 650          * @param bool $bot
 651          * @param string $ip
 652          * @param int $size
 653          * @param int $newId
 654          * @param int $patrol
 655          * @param array $tags
 656          * @return RecentChange
 657          */
 658         public static function notifyNew(
 659                 $timestamp, &$title, $minor, &$user, $comment, $bot,
 660                 $ip = '', $size = 0, $newId = 0, $patrol = 0, $tags = []
 661         ) {
 662                 $rc = new RecentChange;
 663                 $rc->mTitle = $title;
 664                 $rc->mPerformer = $user;
 665                 $rc->mAttribs = [
 666                         'rc_timestamp' => $timestamp,
 667                         'rc_namespace' => $title->getNamespace(),
 668                         'rc_title' => $title->getDBkey(),
 669                         'rc_type' => RC_NEW,
 670                         'rc_source' => self::SRC_NEW,
 671                         'rc_minor' => $minor ? 1 : 0,
 672                         'rc_cur_id' => $title->getArticleID(),
 673                         'rc_user' => $user->getId(),
 674                         'rc_user_text' => $user->getName(),
 675                         'rc_comment' => &$comment,
 676                         'rc_comment_text' => &$comment,
 677                         'rc_comment_data' => null,
 678                         'rc_this_oldid' => $newId,
 679                         'rc_last_oldid' => 0,
 680                         'rc_bot' => $bot ? 1 : 0,
 681                         'rc_ip' => self::checkIPAddress( $ip ),
 682                         'rc_patrolled' => intval( $patrol ),
 683                         'rc_new' => 1, # obsolete
 684                         'rc_old_len' => 0,
 685                         'rc_new_len' => $size,
 686                         'rc_deleted' => 0,
 687                         'rc_logid' => 0,
 688                         'rc_log_type' => null,
 689                         'rc_log_action' => '',
 690                         'rc_params' => ''
 691                 ];
 692
 693                 $rc->mExtra = [
 694                         'prefixedDBkey' => $title->getPrefixedDBkey(),
 695                         'lastTimestamp' => 0,
 696                         'oldSize' => 0,
 697                         'newSize' => $size,
 698                         'pageStatus' => 'created'
 699                 ];
 700
 701                 DeferredUpdates::addCallableUpdate(
 702                         function () use ( $rc, $tags ) {
 703                                 $rc->addTags( $tags );
 704                                 $rc->save();
 705                                 if ( $rc->mAttribs['rc_patrolled'] ) {
 706                                         PatrolLog::record( $rc, true, $rc->getPerformer() );
 707                                 }
 708                         },
 709                         DeferredUpdates::POSTSEND,
 710                         wfGetDB( DB_MASTER )
 711                 );
 712
 713                 return $rc;
 714         }
 715
 716         /**
 717          * @param string $timestamp
 718          * @param Title &$title
 719          * @param User &$user
 720          * @param string $actionComment
 721          * @param string $ip
 722          * @param string $type
 723          * @param string $action
 724          * @param Title $target
 725          * @param string $logComment
 726          * @param string $params
 727          * @param int $newId
 728          * @param string $actionCommentIRC
 729          * @return bool
 730          */
 731         public static function notifyLog( $timestamp, &$title, &$user, $actionComment, $ip, $type,
 732                 $action, $target, $logComment, $params, $newId = 0, $actionCommentIRC = ''
 733         ) {
 734                 global $wgLogRestrictions;
 735
 736                 # Don't add private logs to RC!
 737                 if ( isset( $wgLogRestrictions[$type] ) && $wgLogRestrictions[$type] != '*' ) {
 738                         return false;
 739                 }
 740                 $rc = self::newLogEntry( $timestamp, $title, $user, $actionComment, $ip, $type, $action,
 741                         $target, $logComment, $params, $newId, $actionCommentIRC );
 742                 $rc->save();
 743
 744                 return true;
 745         }
 746
 747         /**
 748          * @param string $timestamp
 749          * @param Title &$title
 750          * @param User &$user
 751          * @param string $actionComment
 752          * @param string $ip
 753          * @param string $type
 754          * @param string $action
 755          * @param Title $target
 756          * @param string $logComment
 757          * @param string $params
 758          * @param int $newId
 759          * @param string $actionCommentIRC
 760          * @param int $revId Id of associated revision, if any
 761          * @param bool $isPatrollable Whether this log entry is patrollable
 762          * @return RecentChange
 763          */
 764         public static function newLogEntry( $timestamp, &$title, &$user, $actionComment, $ip,
 765                 $type, $action, $target, $logComment, $params, $newId = 0, $actionCommentIRC = '',
 766                 $revId = 0, $isPatrollable = false ) {
 767                 global $wgRequest;
 768
 769                 # # Get pageStatus for email notification
 770                 switch ( $type . '-' . $action ) {
 771                         case 'delete-delete':
 772                         case 'delete-delete_redir':
 773                                 $pageStatus = 'deleted';
 774                                 break;
 775                         case 'move-move':
 776                         case 'move-move_redir':
 777                                 $pageStatus = 'moved';
 778                                 break;
 779                         case 'delete-restore':
 780                                 $pageStatus = 'restored';
 781                                 break;
 782                         case 'upload-upload':
 783                                 $pageStatus = 'created';
 784                                 break;
 785                         case 'upload-overwrite':
 786                         default:
 787                                 $pageStatus = 'changed';
 788                                 break;
 789                 }
 790
 791                 // Allow unpatrolled status for patrollable log entries
 792                 $markPatrolled = $isPatrollable ? $user->isAllowed( 'autopatrol' ) : true;
 793
 794                 $rc = new RecentChange;
 795                 $rc->mTitle = $target;
 796                 $rc->mPerformer = $user;
 797                 $rc->mAttribs = [
 798                         'rc_timestamp' => $timestamp,
 799                         'rc_namespace' => $target->getNamespace(),
 800                         'rc_title' => $target->getDBkey(),
 801                         'rc_type' => RC_LOG,
 802                         'rc_source' => self::SRC_LOG,
 803                         'rc_minor' => 0,
 804                         'rc_cur_id' => $target->getArticleID(),
 805                         'rc_user' => $user->getId(),
 806                         'rc_user_text' => $user->getName(),
 807                         'rc_comment' => &$logComment,
 808                         'rc_comment_text' => &$logComment,
 809                         'rc_comment_data' => null,
 810                         'rc_this_oldid' => $revId,
 811                         'rc_last_oldid' => 0,
 812                         'rc_bot' => $user->isAllowed( 'bot' ) ? (int)$wgRequest->getBool( 'bot', true ) : 0,
 813                         'rc_ip' => self::checkIPAddress( $ip ),
 814                         'rc_patrolled' => $markPatrolled ? 1 : 0,
 815                         'rc_new' => 0, # obsolete
 816                         'rc_old_len' => null,
 817                         'rc_new_len' => null,
 818                         'rc_deleted' => 0,
 819                         'rc_logid' => $newId,
 820                         'rc_log_type' => $type,
 821                         'rc_log_action' => $action,
 822                         'rc_params' => $params
 823                 ];
 824
 825                 $rc->mExtra = [
 826                         'prefixedDBkey' => $title->getPrefixedDBkey(),
 827                         'lastTimestamp' => 0,
 828                         'actionComment' => $actionComment, // the comment appended to the action, passed from LogPage
 829                         'pageStatus' => $pageStatus,
 830                         'actionCommentIRC' => $actionCommentIRC
 831                 ];
 832
 833                 return $rc;
 834         }
 835
 836         /**
 837          * Constructs a RecentChange object for the given categorization
 838          * This does not call save() on the object and thus does not write to the db
 839          *
 840          * @since 1.27
 841          *
 842          * @param string $timestamp Timestamp of the recent change to occur
 843          * @param Title $categoryTitle Title of the category a page is being added to or removed from
 844          * @param User $user User object of the user that made the change
 845          * @param string $comment Change summary
 846          * @param Title $pageTitle Title of the page that is being added or removed
 847          * @param int $oldRevId Parent revision ID of this change
 848          * @param int $newRevId Revision ID of this change
 849          * @param string $lastTimestamp Parent revision timestamp of this change
 850          * @param bool $bot true, if the change was made by a bot
 851          * @param string $ip IP address of the user, if the change was made anonymously
 852          * @param int $deleted Indicates whether the change has been deleted
 853          * @param bool $added true, if the category was added, false for removed
 854          *
 855          * @return RecentChange
 856          */
 857         public static function newForCategorization(
 858                 $timestamp,
 859                 Title $categoryTitle,
 860                 User $user = null,
 861                 $comment,
 862                 Title $pageTitle,
 863                 $oldRevId,
 864                 $newRevId,
 865                 $lastTimestamp,
 866                 $bot,
 867                 $ip = '',
 868                 $deleted = 0,
 869                 $added = null
 870         ) {
 871                 // Done in a backwards compatible way.
 872                 $params = [
 873                         'hidden-cat' => WikiCategoryPage::factory( $categoryTitle )->isHidden()
 874                 ];
 875                 if ( $added !== null ) {
 876                         $params['added'] = $added;
 877                 }
 878
 879                 $rc = new RecentChange;
 880                 $rc->mTitle = $categoryTitle;
 881                 $rc->mPerformer = $user;
 882                 $rc->mAttribs = [
 883                         'rc_timestamp' => $timestamp,
 884                         'rc_namespace' => $categoryTitle->getNamespace(),
 885                         'rc_title' => $categoryTitle->getDBkey(),
 886                         'rc_type' => RC_CATEGORIZE,
 887                         'rc_source' => self::SRC_CATEGORIZE,
 888                         'rc_minor' => 0,
 889                         'rc_cur_id' => $pageTitle->getArticleID(),
 890                         'rc_user' => $user ? $user->getId() : 0,
 891                         'rc_user_text' => $user ? $user->getName() : '',
 892                         'rc_comment' => &$comment,
 893                         'rc_comment_text' => &$comment,
 894                         'rc_comment_data' => null,
 895                         'rc_this_oldid' => $newRevId,
 896                         'rc_last_oldid' => $oldRevId,
 897                         'rc_bot' => $bot ? 1 : 0,
 898                         'rc_ip' => self::checkIPAddress( $ip ),
 899                         'rc_patrolled' => 1, // Always patrolled, just like log entries
 900                         'rc_new' => 0, # obsolete
 901                         'rc_old_len' => null,
 902                         'rc_new_len' => null,
 903                         'rc_deleted' => $deleted,
 904                         'rc_logid' => 0,
 905                         'rc_log_type' => null,
 906                         'rc_log_action' => '',
 907                         'rc_params' => serialize( $params )
 908                 ];
 909
 910                 $rc->mExtra = [
 911                         'prefixedDBkey' => $categoryTitle->getPrefixedDBkey(),
 912                         'lastTimestamp' => $lastTimestamp,
 913                         'oldSize' => 0,
 914                         'newSize' => 0,
 915                         'pageStatus' => 'changed'
 916                 ];
 917
 918                 return $rc;
 919         }
 920
 921         /**
 922          * Get a parameter value
 923          *
 924          * @since 1.27
 925          *
 926          * @param string $name parameter name
 927          * @return mixed
 928          */
 929         public function getParam( $name ) {
 930                 $params = $this->parseParams();
 931                 return isset( $params[$name] ) ? $params[$name] : null;
 932         }
 933
 934         /**
 935          * Initialises the members of this object from a mysql row object
 936          *
 937          * @param mixed $row
 938          */
 939         public function loadFromRow( $row ) {
 940                 $this->mAttribs = get_object_vars( $row );
 941                 $this->mAttribs['rc_timestamp'] = wfTimestamp( TS_MW, $this->mAttribs['rc_timestamp'] );
 942                 // rc_deleted MUST be set
 943                 $this->mAttribs['rc_deleted'] = $row->rc_deleted;
 944
 945                 if ( isset( $this->mAttribs['rc_ip'] ) ) {
 946                         // Clean up CIDRs for Postgres per T164898. ("127.0.0.1" casts to "127.0.0.1/32")
 947                         $n = strpos( $this->mAttribs['rc_ip'], '/' );
 948                         if ( $n !== false ) {
 949                                 $this->mAttribs['rc_ip'] = substr( $this->mAttribs['rc_ip'], 0, $n );
 950                         }
 951                 }
 952
 953                 $comment = CommentStore::newKey( 'rc_comment' )
 954                         // Legacy because $row probably came from self::selectFields()
 955                         ->getCommentLegacy( wfGetDB( DB_REPLICA ), $row, true )->text;
 956                 $this->mAttribs['rc_comment'] = &$comment;
 957                 $this->mAttribs['rc_comment_text'] = &$comment;
 958                 $this->mAttribs['rc_comment_data'] = null;
 959         }
 960
 961         /**
 962          * Get an attribute value
 963          *
 964          * @param string $name Attribute name
 965          * @return mixed
 966          */
 967         public function getAttribute( $name ) {
 968                 if ( $name === 'rc_comment' ) {
 969                         return CommentStore::newKey( 'rc_comment' )->getComment( $this->mAttribs, true )->text;
 970                 }
 971                 return isset( $this->mAttribs[$name] ) ? $this->mAttribs[$name] : null;
 972         }
 973
 974         /**
 975          * @return array
 976          */
 977         public function getAttributes() {
 978                 return $this->mAttribs;
 979         }
 980
 981         /**
 982          * Gets the end part of the diff URL associated with this object
 983          * Blank if no diff link should be displayed
 984          * @param bool $forceCur
 985          * @return string
 986          */
 987         public function diffLinkTrail( $forceCur ) {
 988                 if ( $this->mAttribs['rc_type'] == RC_EDIT ) {
 989                         $trail = "curid=" . (int)( $this->mAttribs['rc_cur_id'] ) .
 990                                 "&oldid=" . (int)( $this->mAttribs['rc_last_oldid'] );
 991                         if ( $forceCur ) {
 992                                 $trail .= '&diff=0';
 993                         } else {
 994                                 $trail .= '&diff=' . (int)( $this->mAttribs['rc_this_oldid'] );
 995                         }
 996                 } else {
 997                         $trail = '';
 998                 }
 999
1000                 return $trail;
1001         }
1002
1003         /**
1004          * Returns the change size (HTML).
1005          * The lengths can be given optionally.
1006          * @param int $old
1007          * @param int $new
1008          * @return string
1009          */
1010         public function getCharacterDifference( $old = 0, $new = 0 ) {
1011                 if ( $old === 0 ) {
1012                         $old = $this->mAttribs['rc_old_len'];
1013                 }
1014                 if ( $new === 0 ) {
1015                         $new = $this->mAttribs['rc_new_len'];
1016                 }
1017                 if ( $old === null || $new === null ) {
1018                         return '';
1019                 }
1020
1021                 return ChangesList::showCharacterDifference( $old, $new );
1022         }
1023
1024         private static function checkIPAddress( $ip ) {
1025                 global $wgRequest;
1026                 if ( $ip ) {
1027                         if ( !IP::isIPAddress( $ip ) ) {
1028                                 throw new MWException( "Attempt to write \"" . $ip .
1029                                         "\" as an IP address into recent changes" );
1030                         }
1031                 } else {
1032                         $ip = $wgRequest->getIP();
1033                         if ( !$ip ) {
1034                                 $ip = '';
1035                         }
1036                 }
1037
1038                 return $ip;
1039         }
1040
1041         /**
1042          * Check whether the given timestamp is new enough to have a RC row with a given tolerance
1043          * as the recentchanges table might not be cleared out regularly (so older entries might exist)
1044          * or rows which will be deleted soon shouldn't be included.
1045          *
1046          * @param mixed $timestamp MWTimestamp compatible timestamp
1047          * @param int $tolerance Tolerance in seconds
1048          * @return bool
1049          */
1050         public static function isInRCLifespan( $timestamp, $tolerance = 0 ) {
1051                 global $wgRCMaxAge;
1052
1053                 return wfTimestamp( TS_UNIX, $timestamp ) > time() - $tolerance - $wgRCMaxAge;
1054         }
1055
1056         /**
1057          * Parses and returns the rc_params attribute
1058          *
1059          * @since 1.26
1060          *
1061          * @return mixed|bool false on failed unserialization
1062          */
1063         public function parseParams() {
1064                 $rcParams = $this->getAttribute( 'rc_params' );
1065
1066                 MediaWiki\suppressWarnings();
1067                 $unserializedParams = unserialize( $rcParams );
1068                 MediaWiki\restoreWarnings();
1069
1070                 return $unserializedParams;
1071         }
1072
1073         /**
1074          * Tags to append to the recent change,
1075          * and associated revision/log
1076          *
1077          * @since 1.28
1078          *
1079          * @param string|array $tags
1080          */
1081         public function addTags( $tags ) {
1082                 if ( is_string( $tags ) ) {
1083                         $this->tags[] = $tags;
1084                 } else {
1085                         $this->tags = array_merge( $tags, $this->tags );
1086                 }
1087         }
1088 }