includes/specials/pagers/ContribsPager.php

   1 <?php
   2 /**
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  16  * http://www.gnu.org/copyleft/gpl.html
  17  *
  18  * @file
  19  * @ingroup Pager
  20  */
  21
  22 /**
  23  * Pager for Special:Contributions
  24  * @ingroup Pager
  25  */
  26 use MediaWiki\MediaWikiServices;
  27 use MediaWiki\Linker\LinkRenderer;
  28 use MediaWiki\Storage\RevisionRecord;
  29 use Wikimedia\Rdbms\IResultWrapper;
  30 use Wikimedia\Rdbms\FakeResultWrapper;
  31 use Wikimedia\Rdbms\IDatabase;
  32
  33 class ContribsPager extends RangeChronologicalPager {
  34
  35         /**
  36          * @var string[] Local cache for escaped messages
  37          */
  38         private $messages;
  39
  40         /**
  41          * @var string User name, or a string describing an IP address range
  42          */
  43         private $target;
  44
  45         /**
  46          * @var string|int A single namespace number, or an empty string for all namespaces
  47          */
  48         private $namespace = '';
  49
  50         /**
  51          * @var string|false Name of tag to filter, or false to ignore tags
  52          */
  53         private $tagFilter;
  54
  55         /**
  56          * @var bool Set to true to invert the namespace selection
  57          */
  58         private $nsInvert;
  59
  60         /**
  61          * @var bool Set to true to show both the subject and talk namespace, no matter which got
  62          *  selected
  63          */
  64         private $associated;
  65
  66         /**
  67          * @var bool Set to true to show only deleted revisions
  68          */
  69         private $deletedOnly;
  70
  71         /**
  72          * @var bool Set to true to show only latest (a.k.a. current) revisions
  73          */
  74         private $topOnly;
  75
  76         /**
  77          * @var bool Set to true to show only new pages
  78          */
  79         private $newOnly;
  80
  81         /**
  82          * @var bool Set to true to hide edits marked as minor by the user
  83          */
  84         private $hideMinor;
  85
  86         private $preventClickjacking = false;
  87
  88         /** @var IDatabase */
  89         private $mDbSecondary;
  90
  91         /**
  92          * @var array
  93          */
  94         private $mParentLens;
  95
  96         /**
  97          * @var TemplateParser
  98          */
  99         private $templateParser;
 100
 101         public function __construct( IContextSource $context, array $options,
 102                 LinkRenderer $linkRenderer = null
 103         ) {
 104                 // Set ->target before calling parent::__construct() so
 105                 // parent can call $this->getIndexField() and get the right result. Set
 106                 // the rest too just to keep things simple.
 107                 $this->target = $options['target'] ?? '';
 108                 $this->namespace = $options['namespace'] ?? '';
 109                 $this->tagFilter = $options['tagfilter'] ?? false;
 110                 $this->nsInvert = $options['nsInvert'] ?? false;
 111                 $this->associated = $options['associated'] ?? false;
 112
 113                 $this->deletedOnly = !empty( $options['deletedOnly'] );
 114                 $this->topOnly = !empty( $options['topOnly'] );
 115                 $this->newOnly = !empty( $options['newOnly'] );
 116                 $this->hideMinor = !empty( $options['hideMinor'] );
 117
 118                 parent::__construct( $context, $linkRenderer );
 119
 120                 $msgs = [
 121                         'diff',
 122                         'hist',
 123                         'pipe-separator',
 124                         'uctop'
 125                 ];
 126
 127                 foreach ( $msgs as $msg ) {
 128                         $this->messages[$msg] = $this->msg( $msg )->escaped();
 129                 }
 130
 131                 // Date filtering: use timestamp if available
 132                 $startTimestamp = '';
 133                 $endTimestamp = '';
 134                 if ( $options['start'] ) {
 135                         $startTimestamp = $options['start'] . ' 00:00:00';
 136                 }
 137                 if ( $options['end'] ) {
 138                         $endTimestamp = $options['end'] . ' 23:59:59';
 139                 }
 140                 $this->getDateRangeCond( $startTimestamp, $endTimestamp );
 141
 142                 // Most of this code will use the 'contributions' group DB, which can map to replica DBs
 143                 // with extra user based indexes or partioning by user. The additional metadata
 144                 // queries should use a regular replica DB since the lookup pattern is not all by user.
 145                 $this->mDbSecondary = wfGetDB( DB_REPLICA ); // any random replica DB
 146                 $this->mDb = wfGetDB( DB_REPLICA, 'contributions' );
 147                 $this->templateParser = new TemplateParser();
 148         }
 149
 150         function getDefaultQuery() {
 151                 $query = parent::getDefaultQuery();
 152                 $query['target'] = $this->target;
 153
 154                 return $query;
 155         }
 156
 157         /**
 158          * Wrap the navigation bar in a p element with identifying class.
 159          * In future we may want to change the `p` tag to a `div` and upstream
 160          * this to the parent class.
 161          *
 162          * @return string HTML
 163          */
 164         function getNavigationBar() {
 165                 return Html::rawElement( 'p', [ 'class' => 'mw-pager-navigation-bar' ],
 166                         parent::getNavigationBar()
 167                 );
 168         }
 169
 170         /**
 171          * This method basically executes the exact same code as the parent class, though with
 172          * a hook added, to allow extensions to add additional queries.
 173          *
 174          * @param string $offset Index offset, inclusive
 175          * @param int $limit Exact query limit
 176          * @param bool $order IndexPager::QUERY_ASCENDING or IndexPager::QUERY_DESCENDING
 177          * @return IResultWrapper
 178          */
 179         function reallyDoQuery( $offset, $limit, $order ) {
 180                 list( $tables, $fields, $conds, $fname, $options, $join_conds ) = $this->buildQueryInfo(
 181                         $offset,
 182                         $limit,
 183                         $order
 184                 );
 185
 186                 /*
 187                  * This hook will allow extensions to add in additional queries, so they can get their data
 188                  * in My Contributions as well. Extensions should append their results to the $data array.
 189                  *
 190                  * Extension queries have to implement the navbar requirement as well. They should
 191                  * - have a column aliased as $pager->getIndexField()
 192                  * - have LIMIT set
 193                  * - have a WHERE-clause that compares the $pager->getIndexField()-equivalent column to the offset
 194                  * - have the ORDER BY specified based upon the details provided by the navbar
 195                  *
 196                  * See includes/Pager.php buildQueryInfo() method on how to build LIMIT, WHERE & ORDER BY
 197                  *
 198                  * &$data: an array of results of all contribs queries
 199                  * $pager: the ContribsPager object hooked into
 200                  * $offset: see phpdoc above
 201                  * $limit: see phpdoc above
 202                  * $descending: see phpdoc above
 203                  */
 204                 $data = [ $this->mDb->select(
 205                         $tables, $fields, $conds, $fname, $options, $join_conds
 206                 ) ];
 207                 Hooks::run(
 208                         'ContribsPager::reallyDoQuery',
 209                         [ &$data, $this, $offset, $limit, $order ]
 210                 );
 211
 212                 $result = [];
 213
 214                 // loop all results and collect them in an array
 215                 foreach ( $data as $query ) {
 216                         foreach ( $query as $i => $row ) {
 217                                 // use index column as key, allowing us to easily sort in PHP
 218                                 $result[$row->{$this->getIndexField()} . "-$i"] = $row;
 219                         }
 220                 }
 221
 222                 // sort results
 223                 if ( $order === self::QUERY_ASCENDING ) {
 224                         ksort( $result );
 225                 } else {
 226                         krsort( $result );
 227                 }
 228
 229                 // enforce limit
 230                 $result = array_slice( $result, 0, $limit );
 231
 232                 // get rid of array keys
 233                 $result = array_values( $result );
 234
 235                 return new FakeResultWrapper( $result );
 236         }
 237
 238         /**
 239          * Return the table targeted for ordering and continuation
 240          *
 241          * See T200259 and T221380.
 242          *
 243          * @warning Keep this in sync with self::getQueryInfo()!
 244          *
 245          * @return string
 246          */
 247         private function getTargetTable() {
 248                 $user = User::newFromName( $this->target, false );
 249                 $ipRangeConds = $user->isAnon() ? $this->getIpRangeConds( $this->mDb, $this->target ) : null;
 250                 if ( $ipRangeConds ) {
 251                         return 'ip_changes';
 252                 } else {
 253                         $conds = ActorMigration::newMigration()->getWhere( $this->mDb, 'rev_user', $user );
 254                         if ( isset( $conds['orconds']['actor'] ) ) {
 255                                 // @todo: This will need changing when revision_actor_temp goes away
 256                                 return 'revision_actor_temp';
 257                         }
 258                 }
 259
 260                 return 'revision';
 261         }
 262
 263         function getQueryInfo() {
 264                 $revQuery = Revision::getQueryInfo( [ 'page', 'user' ] );
 265                 $queryInfo = [
 266                         'tables' => $revQuery['tables'],
 267                         'fields' => array_merge( $revQuery['fields'], [ 'page_is_new' ] ),
 268                         'conds' => [],
 269                         'options' => [],
 270                         'join_conds' => $revQuery['joins'],
 271                 ];
 272
 273                 // WARNING: Keep this in sync with getTargetTable()!
 274                 $user = User::newFromName( $this->target, false );
 275                 $ipRangeConds = $user->isAnon() ? $this->getIpRangeConds( $this->mDb, $this->target ) : null;
 276                 if ( $ipRangeConds ) {
 277                         $queryInfo['tables'][] = 'ip_changes';
 278                         $queryInfo['join_conds']['ip_changes'] = [
 279                                 'LEFT JOIN', [ 'ipc_rev_id = rev_id' ]
 280                         ];
 281                         $queryInfo['conds'][] = $ipRangeConds;
 282                 } else {
 283                         // tables and joins are already handled by Revision::getQueryInfo()
 284                         $conds = ActorMigration::newMigration()->getWhere( $this->mDb, 'rev_user', $user );
 285                         $queryInfo['conds'][] = $conds['conds'];
 286                         // Force the appropriate index to avoid bad query plans (T189026)
 287                         if ( isset( $conds['orconds']['actor'] ) ) {
 288                                 // @todo: This will need changing when revision_actor_temp goes away
 289                                 $queryInfo['options']['USE INDEX']['temp_rev_user'] = 'actor_timestamp';
 290                         } else {
 291                                 $queryInfo['options']['USE INDEX']['revision'] =
 292                                         isset( $conds['orconds']['userid'] ) ? 'user_timestamp' : 'usertext_timestamp';
 293                         }
 294                 }
 295
 296                 if ( $this->deletedOnly ) {
 297                         $queryInfo['conds'][] = 'rev_deleted != 0';
 298                 }
 299
 300                 if ( $this->topOnly ) {
 301                         $queryInfo['conds'][] = 'rev_id = page_latest';
 302                 }
 303
 304                 if ( $this->newOnly ) {
 305                         $queryInfo['conds'][] = 'rev_parent_id = 0';
 306                 }
 307
 308                 if ( $this->hideMinor ) {
 309                         $queryInfo['conds'][] = 'rev_minor_edit = 0';
 310                 }
 311
 312                 $user = $this->getUser();
 313                 $queryInfo['conds'] = array_merge( $queryInfo['conds'], $this->getNamespaceCond() );
 314
 315                 // Paranoia: avoid brute force searches (T19342)
 316                 if ( !$user->isAllowed( 'deletedhistory' ) ) {
 317                         $queryInfo['conds'][] = $this->mDb->bitAnd(
 318                                 'rev_deleted', RevisionRecord::DELETED_USER
 319                                 ) . ' = 0';
 320                 } elseif ( !MediaWikiServices::getInstance()
 321                         ->getPermissionManager()
 322                         ->userHasAnyRight( $user, 'suppressrevision', 'viewsuppressed' )
 323                 ) {
 324                         $queryInfo['conds'][] = $this->mDb->bitAnd(
 325                                 'rev_deleted', RevisionRecord::SUPPRESSED_USER
 326                                 ) . ' != ' . RevisionRecord::SUPPRESSED_USER;
 327                 }
 328
 329                 // $this->getIndexField() must be in the result rows, as reallyDoQuery() tries to access it.
 330                 $indexField = $this->getIndexField();
 331                 if ( $indexField !== 'rev_timestamp' ) {
 332                         $queryInfo['fields'][] = $indexField;
 333                 }
 334
 335                 ChangeTags::modifyDisplayQuery(
 336                         $queryInfo['tables'],
 337                         $queryInfo['fields'],
 338                         $queryInfo['conds'],
 339                         $queryInfo['join_conds'],
 340                         $queryInfo['options'],
 341                         $this->tagFilter
 342                 );
 343
 344                 // Avoid PHP 7.1 warning from passing $this by reference
 345                 $pager = $this;
 346                 Hooks::run( 'ContribsPager::getQueryInfo', [ &$pager, &$queryInfo ] );
 347
 348                 return $queryInfo;
 349         }
 350
 351         function getNamespaceCond() {
 352                 if ( $this->namespace !== '' ) {
 353                         $selectedNS = $this->mDb->addQuotes( $this->namespace );
 354                         $eq_op = $this->nsInvert ? '!=' : '=';
 355                         $bool_op = $this->nsInvert ? 'AND' : 'OR';
 356
 357                         if ( !$this->associated ) {
 358                                 return [ "page_namespace $eq_op $selectedNS" ];
 359                         }
 360
 361                         $associatedNS = $this->mDb->addQuotes(
 362                                 MediaWikiServices::getInstance()->getNamespaceInfo()->getAssociated( $this->namespace )
 363                         );
 364
 365                         return [
 366                                 "page_namespace $eq_op $selectedNS " .
 367                                 $bool_op .
 368                                 " page_namespace $eq_op $associatedNS"
 369                         ];
 370                 }
 371
 372                 return [];
 373         }
 374
 375         /**
 376          * Get SQL conditions for an IP range, if applicable
 377          * @param IDatabase      $db
 378          * @param string         $ip The IP address or CIDR
 379          * @return string|false  SQL for valid IP ranges, false if invalid
 380          */
 381         private function getIpRangeConds( $db, $ip ) {
 382                 // First make sure it is a valid range and they are not outside the CIDR limit
 383                 if ( !$this->isQueryableRange( $ip ) ) {
 384                         return false;
 385                 }
 386
 387                 list( $start, $end ) = IP::parseRange( $ip );
 388
 389                 return 'ipc_hex BETWEEN ' . $db->addQuotes( $start ) . ' AND ' . $db->addQuotes( $end );
 390         }
 391
 392         /**
 393          * Is the given IP a range and within the CIDR limit?
 394          *
 395          * @param string $ipRange
 396          * @return bool True if it is valid
 397          * @since 1.30
 398          */
 399         public function isQueryableRange( $ipRange ) {
 400                 $limits = $this->getConfig()->get( 'RangeContributionsCIDRLimit' );
 401
 402                 $bits = IP::parseCIDR( $ipRange )[1];
 403                 if (
 404                         ( $bits === false ) ||
 405                         ( IP::isIPv4( $ipRange ) && $bits < $limits['IPv4'] ) ||
 406                         ( IP::isIPv6( $ipRange ) && $bits < $limits['IPv6'] )
 407                 ) {
 408                         return false;
 409                 }
 410
 411                 return true;
 412         }
 413
 414         /**
 415          * @return string
 416          */
 417         public function getIndexField() {
 418                 // The returned column is used for sorting and continuation, so we need to
 419                 // make sure to use the right denormalized column depending on which table is
 420                 // being targeted by the query to avoid bad query plans.
 421                 // See T200259, T204669, T220991, and T221380.
 422                 $target = $this->getTargetTable();
 423                 switch ( $target ) {
 424                         case 'revision':
 425                                 return 'rev_timestamp';
 426                         case 'ip_changes':
 427                                 return 'ipc_rev_timestamp';
 428                         case 'revision_actor_temp':
 429                                 return 'revactor_timestamp';
 430                         default:
 431                                 wfWarn(
 432                                         __METHOD__ . ": Unknown value '$target' from " . static::class . '::getTargetTable()', 0
 433                                 );
 434                                 return 'rev_timestamp';
 435                 }
 436         }
 437
 438         /**
 439          * @return false|string
 440          */
 441         public function getTagFilter() {
 442                 return $this->tagFilter;
 443         }
 444
 445         /**
 446          * @return string
 447          */
 448         public function getTarget() {
 449                 return $this->target;
 450         }
 451
 452         /**
 453          * @return bool
 454          */
 455         public function isNewOnly() {
 456                 return $this->newOnly;
 457         }
 458
 459         /**
 460          * @return int|string
 461          */
 462         public function getNamespace() {
 463                 return $this->namespace;
 464         }
 465
 466         /**
 467          * @return string[]
 468          */
 469         protected function getExtraSortFields() {
 470                 // The returned columns are used for sorting, so we need to make sure
 471                 // to use the right denormalized column depending on which table is
 472                 // being targeted by the query to avoid bad query plans.
 473                 // See T200259, T204669, T220991, and T221380.
 474                 $target = $this->getTargetTable();
 475                 switch ( $target ) {
 476                         case 'revision':
 477                                 return [ 'rev_id' ];
 478                         case 'ip_changes':
 479                                 return [ 'ipc_rev_id' ];
 480                         case 'revision_actor_temp':
 481                                 return [ 'revactor_rev' ];
 482                         default:
 483                                 wfWarn(
 484                                         __METHOD__ . ": Unknown value '$target' from " . static::class . '::getTargetTable()', 0
 485                                 );
 486                                 return [ 'rev_id' ];
 487                 }
 488         }
 489
 490         protected function doBatchLookups() {
 491                 # Do a link batch query
 492                 $this->mResult->seek( 0 );
 493                 $parentRevIds = [];
 494                 $this->mParentLens = [];
 495                 $batch = new LinkBatch();
 496                 $isIpRange = $this->isQueryableRange( $this->target );
 497                 # Give some pointers to make (last) links
 498                 foreach ( $this->mResult as $row ) {
 499                         if ( isset( $row->rev_parent_id ) && $row->rev_parent_id ) {
 500                                 $parentRevIds[] = $row->rev_parent_id;
 501                         }
 502                         if ( isset( $row->rev_id ) ) {
 503                                 $this->mParentLens[$row->rev_id] = $row->rev_len;
 504                                 if ( $isIpRange ) {
 505                                         // If this is an IP range, batch the IP's talk page
 506                                         $batch->add( NS_USER_TALK, $row->rev_user_text );
 507                                 }
 508                                 $batch->add( $row->page_namespace, $row->page_title );
 509                         }
 510                 }
 511                 # Fetch rev_len for revisions not already scanned above
 512                 $this->mParentLens += Revision::getParentLengths(
 513                         $this->mDbSecondary,
 514                         array_diff( $parentRevIds, array_keys( $this->mParentLens ) )
 515                 );
 516                 $batch->execute();
 517                 $this->mResult->seek( 0 );
 518         }
 519
 520         /**
 521          * @return string
 522          */
 523         protected function getStartBody() {
 524                 return "<ul class=\"mw-contributions-list\">\n";
 525         }
 526
 527         /**
 528          * @return string
 529          */
 530         protected function getEndBody() {
 531                 return "</ul>\n";
 532         }
 533
 534         /**
 535          * Check whether the revision associated is valid for formatting. If has no associated revision
 536          * id then null is returned.
 537          *
 538          * @param object $row
 539          * @param Title|null $title
 540          * @return Revision|null
 541          */
 542         public function tryToCreateValidRevision( $row, $title = null ) {
 543                 /*
 544                  * There may be more than just revision rows. To make sure that we'll only be processing
 545                  * revisions here, let's _try_ to build a revision out of our row (without displaying
 546                  * notices though) and then trying to grab data from the built object. If we succeed,
 547                  * we're definitely dealing with revision data and we may proceed, if not, we'll leave it
 548                  * to extensions to subscribe to the hook to parse the row.
 549                  */
 550                 Wikimedia\suppressWarnings();
 551                 try {
 552                         $rev = new Revision( $row, 0, $title );
 553                         $validRevision = (bool)$rev->getId();
 554                 } catch ( Exception $e ) {
 555                         $validRevision = false;
 556                 }
 557                 Wikimedia\restoreWarnings();
 558                 return $validRevision ? $rev : null;
 559         }
 560
 561         /**
 562          * Generates each row in the contributions list.
 563          *
 564          * Contributions which are marked "top" are currently on top of the history.
 565          * For these contributions, a [rollback] link is shown for users with roll-
 566          * back privileges. The rollback link restores the most recent version that
 567          * was not written by the target user.
 568          *
 569          * @todo This would probably look a lot nicer in a table.
 570          * @param object $row
 571          * @return string
 572          */
 573         function formatRow( $row ) {
 574                 $ret = '';
 575                 $classes = [];
 576                 $attribs = [];
 577
 578                 $linkRenderer = $this->getLinkRenderer();
 579                 $permissionManager = MediaWikiServices::getInstance()->getPermissionManager();
 580
 581                 $page = null;
 582                 // Create a title for the revision if possible
 583                 // Rows from the hook may not include title information
 584                 if ( isset( $row->page_namespace ) && isset( $row->page_title ) ) {
 585                         $page = Title::newFromRow( $row );
 586                 }
 587                 $rev = $this->tryToCreateValidRevision( $row, $page );
 588                 if ( $rev ) {
 589                         $attribs['data-mw-revid'] = $rev->getId();
 590
 591                         $link = $linkRenderer->makeLink(
 592                                 $page,
 593                                 $page->getPrefixedText(),
 594                                 [ 'class' => 'mw-contributions-title' ],
 595                                 $page->isRedirect() ? [ 'redirect' => 'no' ] : []
 596                         );
 597                         # Mark current revisions
 598                         $topmarktext = '';
 599                         $user = $this->getUser();
 600
 601                         if ( $row->rev_id === $row->page_latest ) {
 602                                 $topmarktext .= '<span class="mw-uctop">' . $this->messages['uctop'] . '</span>';
 603                                 $classes[] = 'mw-contributions-current';
 604                                 # Add rollback link
 605                                 if ( !$row->page_is_new &&
 606                                         $permissionManager->quickUserCan( 'rollback', $user, $page ) &&
 607                                         $permissionManager->quickUserCan( 'edit', $user, $page )
 608                                 ) {
 609                                         $this->preventClickjacking();
 610                                         $topmarktext .= ' ' . Linker::generateRollback( $rev, $this->getContext(),
 611                                                 [ 'noBrackets' ] );
 612                                 }
 613                         }
 614                         # Is there a visible previous revision?
 615                         if ( $rev->userCan( RevisionRecord::DELETED_TEXT, $user ) && $rev->getParentId() !== 0 ) {
 616                                 $difftext = $linkRenderer->makeKnownLink(
 617                                         $page,
 618                                         new HtmlArmor( $this->messages['diff'] ),
 619                                         [ 'class' => 'mw-changeslist-diff' ],
 620                                         [
 621                                                 'diff' => 'prev',
 622                                                 'oldid' => $row->rev_id
 623                                         ]
 624                                 );
 625                         } else {
 626                                 $difftext = $this->messages['diff'];
 627                         }
 628                         $histlink = $linkRenderer->makeKnownLink(
 629                                 $page,
 630                                 new HtmlArmor( $this->messages['hist'] ),
 631                                 [ 'class' => 'mw-changeslist-history' ],
 632                                 [ 'action' => 'history' ]
 633                         );
 634
 635                         if ( $row->rev_parent_id === null ) {
 636                                 // For some reason rev_parent_id isn't populated for this row.
 637                                 // Its rumoured this is true on wikipedia for some revisions (T36922).
 638                                 // Next best thing is to have the total number of bytes.
 639                                 $chardiff = ' <span class="mw-changeslist-separator"></span> ';
 640                                 $chardiff .= Linker::formatRevisionSize( $row->rev_len );
 641                                 $chardiff .= ' <span class="mw-changeslist-separator"></span> ';
 642                         } else {
 643                                 $parentLen = 0;
 644                                 if ( isset( $this->mParentLens[$row->rev_parent_id] ) ) {
 645                                         $parentLen = $this->mParentLens[$row->rev_parent_id];
 646                                 }
 647
 648                                 $chardiff = ' <span class="mw-changeslist-separator"></span> ';
 649                                 $chardiff .= ChangesList::showCharacterDifference(
 650                                         $parentLen,
 651                                         $row->rev_len,
 652                                         $this->getContext()
 653                                 );
 654                                 $chardiff .= ' <span class="mw-changeslist-separator"></span> ';
 655                         }
 656
 657                         $lang = $this->getLanguage();
 658                         $comment = $lang->getDirMark() . Linker::revComment( $rev, false, true, false );
 659                         $d = ChangesList::revDateLink( $rev, $user, $lang, $page );
 660
 661                         # When querying for an IP range, we want to always show user and user talk links.
 662                         $userlink = '';
 663                         if ( $this->isQueryableRange( $this->target ) ) {
 664                                 $userlink = ' <span class="mw-changeslist-separator"></span> '
 665                                         . $lang->getDirMark()
 666                                         . Linker::userLink( $rev->getUser(), $rev->getUserText() );
 667                                 $userlink .= ' ' . $this->msg( 'parentheses' )->rawParams(
 668                                         Linker::userTalkLink( $rev->getUser(), $rev->getUserText() ) )->escaped() . ' ';
 669                         }
 670
 671                         $flags = [];
 672                         if ( $rev->getParentId() === 0 ) {
 673                                 $flags[] = ChangesList::flag( 'newpage' );
 674                         }
 675
 676                         if ( $rev->isMinor() ) {
 677                                 $flags[] = ChangesList::flag( 'minor' );
 678                         }
 679
 680                         $del = Linker::getRevDeleteLink( $user, $rev, $page );
 681                         if ( $del !== '' ) {
 682                                 $del .= ' ';
 683                         }
 684
 685                         // While it might be tempting to use a list here
 686                         // this would result in clutter and slows down navigating the content
 687                         // in assistive technology.
 688                         // See https://phabricator.wikimedia.org/T205581#4734812
 689                         $diffHistLinks = Html::rawElement( 'span',
 690                                 [ 'class' => 'mw-changeslist-links' ],
 691                                 // The spans are needed to ensure the dividing '|' elements are not
 692                                 // themselves styled as links.
 693                                 Html::rawElement( 'span', [], $difftext ) .
 694                                 ' ' . // Space needed for separating two words.
 695                                 Html::rawElement( 'span', [], $histlink )
 696                         );
 697
 698                         # Tags, if any.
 699                         list( $tagSummary, $newClasses ) = ChangeTags::formatSummaryRow(
 700                                 $row->ts_tags,
 701                                 'contributions',
 702                                 $this->getContext()
 703                         );
 704                         $classes = array_merge( $classes, $newClasses );
 705
 706                         Hooks::run( 'SpecialContributions::formatRow::flags', [ $this->getContext(), $row, &$flags ] );
 707
 708                         $templateParams = [
 709                                 'del' => $del,
 710                                 'timestamp' => $d,
 711                                 'diffHistLinks' => $diffHistLinks,
 712                                 'charDifference' => $chardiff,
 713                                 'flags' => $flags,
 714                                 'articleLink' => $link,
 715                                 'userlink' => $userlink,
 716                                 'logText' => $comment,
 717                                 'topmarktext' => $topmarktext,
 718                                 'tagSummary' => $tagSummary,
 719                         ];
 720
 721                         # Denote if username is redacted for this edit
 722                         if ( $rev->isDeleted( RevisionRecord::DELETED_USER ) ) {
 723                                 $templateParams['rev-deleted-user-contribs'] =
 724                                         $this->msg( 'rev-deleted-user-contribs' )->escaped();
 725                         }
 726
 727                         $ret = $this->templateParser->processTemplate(
 728                                 'SpecialContributionsLine',
 729                                 $templateParams
 730                         );
 731                 }
 732
 733                 // Let extensions add data
 734                 Hooks::run( 'ContributionsLineEnding', [ $this, &$ret, $row, &$classes, &$attribs ] );
 735                 $attribs = array_filter( $attribs,
 736                         [ Sanitizer::class, 'isReservedDataAttribute' ],
 737                         ARRAY_FILTER_USE_KEY
 738                 );
 739
 740                 // TODO: Handle exceptions in the catch block above.  Do any extensions rely on
 741                 // receiving empty rows?
 742
 743                 if ( $classes === [] && $attribs === [] && $ret === '' ) {
 744                         wfDebug( "Dropping Special:Contribution row that could not be formatted\n" );
 745                         return "<!-- Could not format Special:Contribution row. -->\n";
 746                 }
 747                 $attribs['class'] = $classes;
 748
 749                 // FIXME: The signature of the ContributionsLineEnding hook makes it
 750                 // very awkward to move this LI wrapper into the template.
 751                 return Html::rawElement( 'li', $attribs, $ret ) . "\n";
 752         }
 753
 754         /**
 755          * Overwrite Pager function and return a helpful comment
 756          * @return string
 757          */
 758         function getSqlComment() {
 759                 if ( $this->namespace || $this->deletedOnly ) {
 760                         // potentially slow, see CR r58153
 761                         return 'contributions page filtered for namespace or RevisionDeleted edits';
 762                 } else {
 763                         return 'contributions page unfiltered';
 764                 }
 765         }
 766
 767         protected function preventClickjacking() {
 768                 $this->preventClickjacking = true;
 769         }
 770
 771         /**
 772          * @return bool
 773          */
 774         public function getPreventClickjacking() {
 775                 return $this->preventClickjacking;
 776         }
 777
 778         /**
 779          * Set up date filter options, given request data.
 780          *
 781          * @param array $opts Options array
 782          * @return array Options array with processed start and end date filter options
 783          */
 784         public static function processDateFilter( array $opts ) {
 785                 $start = $opts['start'] ?? '';
 786                 $end = $opts['end'] ?? '';
 787                 $year = $opts['year'] ?? '';
 788                 $month = $opts['month'] ?? '';
 789
 790                 if ( $start !== '' && $end !== '' && $start > $end ) {
 791                         $temp = $start;
 792                         $start = $end;
 793                         $end = $temp;
 794                 }
 795
 796                 // If year/month legacy filtering options are set, convert them to display the new stamp
 797                 if ( $year !== '' || $month !== '' ) {
 798                         // Reuse getDateCond logic, but subtract a day because
 799                         // the endpoints of our date range appear inclusive
 800                         // but the internal end offsets are always exclusive
 801                         $legacyTimestamp = ReverseChronologicalPager::getOffsetDate( $year, $month );
 802                         $legacyDateTime = new DateTime( $legacyTimestamp->getTimestamp( TS_ISO_8601 ) );
 803                         $legacyDateTime = $legacyDateTime->modify( '-1 day' );
 804
 805                         // Clear the new timestamp range options if used and
 806                         // replace with the converted legacy timestamp
 807                         $start = '';
 808                         $end = $legacyDateTime->format( 'Y-m-d' );
 809                 }
 810
 811                 $opts['start'] = $start;
 812                 $opts['end'] = $end;
 813
 814                 return $opts;
 815         }
 816 }