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 Wikimedia\Rdbms\IResultWrapper;
  28 use Wikimedia\Rdbms\FakeResultWrapper;
  29 use Wikimedia\Rdbms\IDatabase;
  30
  31 class ContribsPager extends RangeChronologicalPager {
  32
  33         public $mDefaultDirection = IndexPager::DIR_DESCENDING;
  34         public $messages;
  35         public $target;
  36         public $namespace = '';
  37         public $mDb;
  38         public $preventClickjacking = false;
  39
  40         /** @var IDatabase */
  41         public $mDbSecondary;
  42
  43         /**
  44          * @var array
  45          */
  46         protected $mParentLens;
  47
  48         /**
  49          * @var TemplateParser
  50          */
  51         protected $templateParser;
  52
  53         function __construct( IContextSource $context, array $options ) {
  54                 parent::__construct( $context );
  55
  56                 $msgs = [
  57                         'diff',
  58                         'hist',
  59                         'pipe-separator',
  60                         'uctop'
  61                 ];
  62
  63                 foreach ( $msgs as $msg ) {
  64                         $this->messages[$msg] = $this->msg( $msg )->escaped();
  65                 }
  66
  67                 $this->target = $options['target'] ?? '';
  68                 $this->contribs = $options['contribs'] ?? 'users';
  69                 $this->namespace = $options['namespace'] ?? '';
  70                 $this->tagFilter = $options['tagfilter'] ?? false;
  71                 $this->nsInvert = $options['nsInvert'] ?? false;
  72                 $this->associated = $options['associated'] ?? false;
  73
  74                 $this->deletedOnly = !empty( $options['deletedOnly'] );
  75                 $this->topOnly = !empty( $options['topOnly'] );
  76                 $this->newOnly = !empty( $options['newOnly'] );
  77                 $this->hideMinor = !empty( $options['hideMinor'] );
  78
  79                 // Date filtering: use timestamp if available
  80                 $startTimestamp = '';
  81                 $endTimestamp = '';
  82                 if ( $options['start'] ) {
  83                         $startTimestamp = $options['start'] . ' 00:00:00';
  84                 }
  85                 if ( $options['end'] ) {
  86                         $endTimestamp = $options['end'] . ' 23:59:59';
  87                 }
  88                 $this->getDateRangeCond( $startTimestamp, $endTimestamp );
  89
  90                 // This property on IndexPager is set by $this->getIndexField() in parent::__construct().
  91                 // We need to reassign it here so that it is used when the actual query is ran.
  92                 $this->mIndexField = $this->getIndexField();
  93
  94                 // Most of this code will use the 'contributions' group DB, which can map to replica DBs
  95                 // with extra user based indexes or partioning by user. The additional metadata
  96                 // queries should use a regular replica DB since the lookup pattern is not all by user.
  97                 $this->mDbSecondary = wfGetDB( DB_REPLICA ); // any random replica DB
  98                 $this->mDb = wfGetDB( DB_REPLICA, 'contributions' );
  99                 $this->templateParser = new TemplateParser();
 100         }
 101
 102         function getDefaultQuery() {
 103                 $query = parent::getDefaultQuery();
 104                 $query['target'] = $this->target;
 105
 106                 return $query;
 107         }
 108
 109         /**
 110          * This method basically executes the exact same code as the parent class, though with
 111          * a hook added, to allow extensions to add additional queries.
 112          *
 113          * @param string $offset Index offset, inclusive
 114          * @param int $limit Exact query limit
 115          * @param bool $descending Query direction, false for ascending, true for descending
 116          * @return IResultWrapper
 117          */
 118         function reallyDoQuery( $offset, $limit, $descending ) {
 119                 list( $tables, $fields, $conds, $fname, $options, $join_conds ) = $this->buildQueryInfo(
 120                         $offset,
 121                         $limit,
 122                         $descending
 123                 );
 124
 125                 /*
 126                  * This hook will allow extensions to add in additional queries, so they can get their data
 127                  * in My Contributions as well. Extensions should append their results to the $data array.
 128                  *
 129                  * Extension queries have to implement the navbar requirement as well. They should
 130                  * - have a column aliased as $pager->getIndexField()
 131                  * - have LIMIT set
 132                  * - have a WHERE-clause that compares the $pager->getIndexField()-equivalent column to the offset
 133                  * - have the ORDER BY specified based upon the details provided by the navbar
 134                  *
 135                  * See includes/Pager.php buildQueryInfo() method on how to build LIMIT, WHERE & ORDER BY
 136                  *
 137                  * &$data: an array of results of all contribs queries
 138                  * $pager: the ContribsPager object hooked into
 139                  * $offset: see phpdoc above
 140                  * $limit: see phpdoc above
 141                  * $descending: see phpdoc above
 142                  */
 143                 $data = [ $this->mDb->select(
 144                         $tables, $fields, $conds, $fname, $options, $join_conds
 145                 ) ];
 146                 Hooks::run(
 147                         'ContribsPager::reallyDoQuery',
 148                         [ &$data, $this, $offset, $limit, $descending ]
 149                 );
 150
 151                 $result = [];
 152
 153                 // loop all results and collect them in an array
 154                 foreach ( $data as $query ) {
 155                         foreach ( $query as $i => $row ) {
 156                                 // use index column as key, allowing us to easily sort in PHP
 157                                 $result[$row->{$this->getIndexField()} . "-$i"] = $row;
 158                         }
 159                 }
 160
 161                 // sort results
 162                 if ( $descending ) {
 163                         ksort( $result );
 164                 } else {
 165                         krsort( $result );
 166                 }
 167
 168                 // enforce limit
 169                 $result = array_slice( $result, 0, $limit );
 170
 171                 // get rid of array keys
 172                 $result = array_values( $result );
 173
 174                 return new FakeResultWrapper( $result );
 175         }
 176
 177         function getQueryInfo() {
 178                 $revQuery = Revision::getQueryInfo( [ 'page', 'user' ] );
 179                 $queryInfo = [
 180                         'tables' => $revQuery['tables'],
 181                         'fields' => array_merge( $revQuery['fields'], [ 'page_is_new' ] ),
 182                         'conds' => [],
 183                         'options' => [],
 184                         'join_conds' => $revQuery['joins'],
 185                 ];
 186
 187                 if ( $this->contribs == 'newbie' ) {
 188                         $max = $this->mDb->selectField( 'user', 'max(user_id)', '', __METHOD__ );
 189                         $queryInfo['conds'][] = $revQuery['fields']['rev_user'] . ' >' . (int)( $max - $max / 100 );
 190                         # ignore local groups with the bot right
 191                         # @todo FIXME: Global groups may have 'bot' rights
 192                         $groupsWithBotPermission = User::getGroupsWithPermission( 'bot' );
 193                         if ( count( $groupsWithBotPermission ) ) {
 194                                 $queryInfo['tables'][] = 'user_groups';
 195                                 $queryInfo['conds'][] = 'ug_group IS NULL';
 196                                 $queryInfo['join_conds']['user_groups'] = [
 197                                         'LEFT JOIN', [
 198                                                 'ug_user = ' . $revQuery['fields']['rev_user'],
 199                                                 'ug_group' => $groupsWithBotPermission,
 200                                                 'ug_expiry IS NULL OR ug_expiry >= ' .
 201                                                         $this->mDb->addQuotes( $this->mDb->timestamp() )
 202                                         ]
 203                                 ];
 204                         }
 205                         // (T140537) Disallow looking too far in the past for 'newbies' queries. If the user requested
 206                         // a timestamp offset far in the past such that there are no edits by users with user_ids in
 207                         // the range, we would end up scanning all revisions from that offset until start of time.
 208                         $queryInfo['conds'][] = 'rev_timestamp > ' .
 209                                 $this->mDb->addQuotes( $this->mDb->timestamp( wfTimestamp() - 30 * 24 * 60 * 60 ) );
 210                 } else {
 211                         $user = User::newFromName( $this->target, false );
 212                         $ipRangeConds = $user->isAnon() ? $this->getIpRangeConds( $this->mDb, $this->target ) : null;
 213                         if ( $ipRangeConds ) {
 214                                 $queryInfo['tables'][] = 'ip_changes';
 215                                 $queryInfo['join_conds']['ip_changes'] = [
 216                                         'LEFT JOIN', [ 'ipc_rev_id = rev_id' ]
 217                                 ];
 218                                 $queryInfo['conds'][] = $ipRangeConds;
 219                         } else {
 220                                 // tables and joins are already handled by Revision::getQueryInfo()
 221                                 $conds = ActorMigration::newMigration()->getWhere( $this->mDb, 'rev_user', $user );
 222                                 $queryInfo['conds'][] = $conds['conds'];
 223                                 // Force the appropriate index to avoid bad query plans (T189026)
 224                                 if ( isset( $conds['orconds']['actor'] ) ) {
 225                                         // @todo: This will need changing when revision_comment_temp goes away
 226                                         $queryInfo['options']['USE INDEX']['temp_rev_user'] = 'actor_timestamp';
 227                                         // Alias 'rev_timestamp' => 'revactor_timestamp' so "ORDER BY rev_timestamp" is interpreted to
 228                                         // use revactor_timestamp instead.
 229                                         $queryInfo['fields'] = array_merge(
 230                                                 array_diff( $queryInfo['fields'], [ 'rev_timestamp' ] ),
 231                                                 [ 'rev_timestamp' => 'revactor_timestamp' ]
 232                                         );
 233                                 } else {
 234                                         $queryInfo['options']['USE INDEX']['revision'] =
 235                                                 isset( $conds['orconds']['userid'] ) ? 'user_timestamp' : 'usertext_timestamp';
 236                                 }
 237                         }
 238                 }
 239
 240                 if ( $this->deletedOnly ) {
 241                         $queryInfo['conds'][] = 'rev_deleted != 0';
 242                 }
 243
 244                 if ( $this->topOnly ) {
 245                         $queryInfo['conds'][] = 'rev_id = page_latest';
 246                 }
 247
 248                 if ( $this->newOnly ) {
 249                         $queryInfo['conds'][] = 'rev_parent_id = 0';
 250                 }
 251
 252                 if ( $this->hideMinor ) {
 253                         $queryInfo['conds'][] = 'rev_minor_edit = 0';
 254                 }
 255
 256                 $user = $this->getUser();
 257                 $queryInfo['conds'] = array_merge( $queryInfo['conds'], $this->getNamespaceCond() );
 258
 259                 // Paranoia: avoid brute force searches (T19342)
 260                 if ( !$user->isAllowed( 'deletedhistory' ) ) {
 261                         $queryInfo['conds'][] = $this->mDb->bitAnd( 'rev_deleted', Revision::DELETED_USER ) . ' = 0';
 262                 } elseif ( !$user->isAllowedAny( 'suppressrevision', 'viewsuppressed' ) ) {
 263                         $queryInfo['conds'][] = $this->mDb->bitAnd( 'rev_deleted', Revision::SUPPRESSED_USER ) .
 264                                 ' != ' . Revision::SUPPRESSED_USER;
 265                 }
 266
 267                 // For IPv6, we use ipc_rev_timestamp on ip_changes as the index field,
 268                 // which will be referenced when parsing the results of a query.
 269                 if ( self::isQueryableRange( $this->target ) ) {
 270                         $queryInfo['fields'][] = 'ipc_rev_timestamp';
 271                 }
 272
 273                 ChangeTags::modifyDisplayQuery(
 274                         $queryInfo['tables'],
 275                         $queryInfo['fields'],
 276                         $queryInfo['conds'],
 277                         $queryInfo['join_conds'],
 278                         $queryInfo['options'],
 279                         $this->tagFilter
 280                 );
 281
 282                 // Avoid PHP 7.1 warning from passing $this by reference
 283                 $pager = $this;
 284                 Hooks::run( 'ContribsPager::getQueryInfo', [ &$pager, &$queryInfo ] );
 285
 286                 return $queryInfo;
 287         }
 288
 289         function getNamespaceCond() {
 290                 if ( $this->namespace !== '' ) {
 291                         $selectedNS = $this->mDb->addQuotes( $this->namespace );
 292                         $eq_op = $this->nsInvert ? '!=' : '=';
 293                         $bool_op = $this->nsInvert ? 'AND' : 'OR';
 294
 295                         if ( !$this->associated ) {
 296                                 return [ "page_namespace $eq_op $selectedNS" ];
 297                         }
 298
 299                         $associatedNS = $this->mDb->addQuotes(
 300                                 MWNamespace::getAssociated( $this->namespace )
 301                         );
 302
 303                         return [
 304                                 "page_namespace $eq_op $selectedNS " .
 305                                 $bool_op .
 306                                 " page_namespace $eq_op $associatedNS"
 307                         ];
 308                 }
 309
 310                 return [];
 311         }
 312
 313         /**
 314          * Get SQL conditions for an IP range, if applicable
 315          * @param IDatabase      $db
 316          * @param string         $ip The IP address or CIDR
 317          * @return string|false  SQL for valid IP ranges, false if invalid
 318          */
 319         private function getIpRangeConds( $db, $ip ) {
 320                 // First make sure it is a valid range and they are not outside the CIDR limit
 321                 if ( !$this->isQueryableRange( $ip ) ) {
 322                         return false;
 323                 }
 324
 325                 list( $start, $end ) = IP::parseRange( $ip );
 326
 327                 return 'ipc_hex BETWEEN ' . $db->addQuotes( $start ) . ' AND ' . $db->addQuotes( $end );
 328         }
 329
 330         /**
 331          * Is the given IP a range and within the CIDR limit?
 332          *
 333          * @param string $ipRange
 334          * @return bool True if it is valid
 335          * @since 1.30
 336          */
 337         public function isQueryableRange( $ipRange ) {
 338                 $limits = $this->getConfig()->get( 'RangeContributionsCIDRLimit' );
 339
 340                 $bits = IP::parseCIDR( $ipRange )[1];
 341                 if (
 342                         ( $bits === false ) ||
 343                         ( IP::isIPv4( $ipRange ) && $bits < $limits['IPv4'] ) ||
 344                         ( IP::isIPv6( $ipRange ) && $bits < $limits['IPv6'] )
 345                 ) {
 346                         return false;
 347                 }
 348
 349                 return true;
 350         }
 351
 352         /**
 353          * Override of getIndexField() in IndexPager.
 354          * For IP ranges, it's faster to use the replicated ipc_rev_timestamp
 355          * on the `ip_changes` table than the rev_timestamp on the `revision` table.
 356          * @return string Name of field
 357          */
 358         public function getIndexField() {
 359                 if ( $this->isQueryableRange( $this->target ) ) {
 360                         return 'ipc_rev_timestamp';
 361                 } else {
 362                         return 'rev_timestamp';
 363                 }
 364         }
 365
 366         function doBatchLookups() {
 367                 # Do a link batch query
 368                 $this->mResult->seek( 0 );
 369                 $parentRevIds = [];
 370                 $this->mParentLens = [];
 371                 $batch = new LinkBatch();
 372                 $isIpRange = $this->isQueryableRange( $this->target );
 373                 # Give some pointers to make (last) links
 374                 foreach ( $this->mResult as $row ) {
 375                         if ( isset( $row->rev_parent_id ) && $row->rev_parent_id ) {
 376                                 $parentRevIds[] = $row->rev_parent_id;
 377                         }
 378                         if ( isset( $row->rev_id ) ) {
 379                                 $this->mParentLens[$row->rev_id] = $row->rev_len;
 380                                 if ( $this->contribs === 'newbie' ) { // multiple users
 381                                         $batch->add( NS_USER, $row->user_name );
 382                                         $batch->add( NS_USER_TALK, $row->user_name );
 383                                 } elseif ( $isIpRange ) {
 384                                         // If this is an IP range, batch the IP's talk page
 385                                         $batch->add( NS_USER_TALK, $row->rev_user_text );
 386                                 }
 387                                 $batch->add( $row->page_namespace, $row->page_title );
 388                         }
 389                 }
 390                 # Fetch rev_len for revisions not already scanned above
 391                 $this->mParentLens += Revision::getParentLengths(
 392                         $this->mDbSecondary,
 393                         array_diff( $parentRevIds, array_keys( $this->mParentLens ) )
 394                 );
 395                 $batch->execute();
 396                 $this->mResult->seek( 0 );
 397         }
 398
 399         /**
 400          * @return string
 401          */
 402         function getStartBody() {
 403                 return "<ul class=\"mw-contributions-list\">\n";
 404         }
 405
 406         /**
 407          * @return string
 408          */
 409         function getEndBody() {
 410                 return "</ul>\n";
 411         }
 412
 413         /**
 414          * Check whether the revision associated is valid for formatting. If has no associated revision
 415          * id then null is returned.
 416          *
 417          * @param object $row
 418          * @param Title|null $title
 419          * @return Revision|null
 420          */
 421         public function tryToCreateValidRevision( $row, $title = null ) {
 422                 /*
 423                  * There may be more than just revision rows. To make sure that we'll only be processing
 424                  * revisions here, let's _try_ to build a revision out of our row (without displaying
 425                  * notices though) and then trying to grab data from the built object. If we succeed,
 426                  * we're definitely dealing with revision data and we may proceed, if not, we'll leave it
 427                  * to extensions to subscribe to the hook to parse the row.
 428                  */
 429                 Wikimedia\suppressWarnings();
 430                 try {
 431                         $rev = new Revision( $row, 0, $title );
 432                         $validRevision = (bool)$rev->getId();
 433                 } catch ( Exception $e ) {
 434                         $validRevision = false;
 435                 }
 436                 Wikimedia\restoreWarnings();
 437                 return $validRevision ? $rev : null;
 438         }
 439
 440         /**
 441          * Generates each row in the contributions list.
 442          *
 443          * Contributions which are marked "top" are currently on top of the history.
 444          * For these contributions, a [rollback] link is shown for users with roll-
 445          * back privileges. The rollback link restores the most recent version that
 446          * was not written by the target user.
 447          *
 448          * @todo This would probably look a lot nicer in a table.
 449          * @param object $row
 450          * @return string
 451          */
 452         function formatRow( $row ) {
 453                 $ret = '';
 454                 $classes = [];
 455                 $attribs = [];
 456
 457                 $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
 458
 459                 $page = null;
 460                 // Create a title for the revision if possible
 461                 // Rows from the hook may not include title information
 462                 if ( isset( $row->page_namespace ) && isset( $row->page_title ) ) {
 463                         $page = Title::newFromRow( $row );
 464                 }
 465                 $rev = $this->tryToCreateValidRevision( $row, $page );
 466                 if ( $rev ) {
 467                         $attribs['data-mw-revid'] = $rev->getId();
 468
 469                         $link = $linkRenderer->makeLink(
 470                                 $page,
 471                                 $page->getPrefixedText(),
 472                                 [ 'class' => 'mw-contributions-title' ],
 473                                 $page->isRedirect() ? [ 'redirect' => 'no' ] : []
 474                         );
 475                         # Mark current revisions
 476                         $topmarktext = '';
 477                         $user = $this->getUser();
 478
 479                         if ( $row->rev_id === $row->page_latest ) {
 480                                 $topmarktext .= '<span class="mw-uctop">' . $this->messages['uctop'] . '</span>';
 481                                 $classes[] = 'mw-contributions-current';
 482                                 # Add rollback link
 483                                 if ( !$row->page_is_new && $page->quickUserCan( 'rollback', $user )
 484                                         && $page->quickUserCan( 'edit', $user )
 485                                 ) {
 486                                         $this->preventClickjacking();
 487                                         $topmarktext .= ' ' . Linker::generateRollback( $rev, $this->getContext() );
 488                                 }
 489                         }
 490                         # Is there a visible previous revision?
 491                         if ( $rev->userCan( Revision::DELETED_TEXT, $user ) && $rev->getParentId() !== 0 ) {
 492                                 $difftext = $linkRenderer->makeKnownLink(
 493                                         $page,
 494                                         new HtmlArmor( $this->messages['diff'] ),
 495                                         [ 'class' => 'mw-changeslist-diff' ],
 496                                         [
 497                                                 'diff' => 'prev',
 498                                                 'oldid' => $row->rev_id
 499                                         ]
 500                                 );
 501                         } else {
 502                                 $difftext = $this->messages['diff'];
 503                         }
 504                         $histlink = $linkRenderer->makeKnownLink(
 505                                 $page,
 506                                 new HtmlArmor( $this->messages['hist'] ),
 507                                 [ 'class' => 'mw-changeslist-history' ],
 508                                 [ 'action' => 'history' ]
 509                         );
 510
 511                         if ( $row->rev_parent_id === null ) {
 512                                 // For some reason rev_parent_id isn't populated for this row.
 513                                 // Its rumoured this is true on wikipedia for some revisions (T36922).
 514                                 // Next best thing is to have the total number of bytes.
 515                                 $chardiff = ' <span class="mw-changeslist-separator"></span> ';
 516                                 $chardiff .= Linker::formatRevisionSize( $row->rev_len );
 517                                 $chardiff .= ' <span class="mw-changeslist-separator"></span> ';
 518                         } else {
 519                                 $parentLen = 0;
 520                                 if ( isset( $this->mParentLens[$row->rev_parent_id] ) ) {
 521                                         $parentLen = $this->mParentLens[$row->rev_parent_id];
 522                                 }
 523
 524                                 $chardiff = ' <span class="mw-changeslist-separator"></span> ';
 525                                 $chardiff .= ChangesList::showCharacterDifference(
 526                                         $parentLen,
 527                                         $row->rev_len,
 528                                         $this->getContext()
 529                                 );
 530                                 $chardiff .= ' <span class="mw-changeslist-separator"></span> ';
 531                         }
 532
 533                         $lang = $this->getLanguage();
 534                         $comment = $lang->getDirMark() . Linker::revComment( $rev, false, true, false );
 535                         $date = $lang->userTimeAndDate( $row->rev_timestamp, $user );
 536                         if ( $rev->userCan( Revision::DELETED_TEXT, $user ) ) {
 537                                 $d = $linkRenderer->makeKnownLink(
 538                                         $page,
 539                                         $date,
 540                                         [ 'class' => 'mw-changeslist-date' ],
 541                                         [ 'oldid' => intval( $row->rev_id ) ]
 542                                 );
 543                         } else {
 544                                 $d = htmlspecialchars( $date );
 545                         }
 546                         if ( $rev->isDeleted( Revision::DELETED_TEXT ) ) {
 547                                 $d = '<span class="history-deleted">' . $d . '</span>';
 548                         }
 549
 550                         # Show user names for /newbies as there may be different users.
 551                         # Note that only unprivileged users have rows with hidden user names excluded.
 552                         # When querying for an IP range, we want to always show user and user talk links.
 553                         $userlink = '';
 554                         if ( ( $this->contribs == 'newbie' && !$rev->isDeleted( Revision::DELETED_USER ) )
 555                                 || $this->isQueryableRange( $this->target ) ) {
 556                                 $userlink = ' <span class="mw-changeslist-separator"></span> '
 557                                         . $lang->getDirMark()
 558                                         . Linker::userLink( $rev->getUser(), $rev->getUserText() );
 559                                 $userlink .= ' ' . $this->msg( 'parentheses' )->rawParams(
 560                                         Linker::userTalkLink( $rev->getUser(), $rev->getUserText() ) )->escaped() . ' ';
 561                         }
 562
 563                         $flags = [];
 564                         if ( $rev->getParentId() === 0 ) {
 565                                 $flags[] = ChangesList::flag( 'newpage' );
 566                         }
 567
 568                         if ( $rev->isMinor() ) {
 569                                 $flags[] = ChangesList::flag( 'minor' );
 570                         }
 571
 572                         $del = Linker::getRevDeleteLink( $user, $rev, $page );
 573                         if ( $del !== '' ) {
 574                                 $del .= ' ';
 575                         }
 576
 577                         // While it might be tempting to use a list here
 578                         // this would result in clutter and slows down navigating the content
 579                         // in assistive technology.
 580                         // See https://phabricator.wikimedia.org/T205581#4734812
 581                         $diffHistLinks = Html::rawElement( 'span',
 582                                 [ 'class' => 'mw-changeslist-links' ],
 583                                 // The spans are needed to ensure the dividing '|' elements are not
 584                                 // themselves styled as links.
 585                                 Html::rawElement( 'span', [], $difftext ) .
 586                                 ' ' . // Space needed for separating two words.
 587                                 Html::rawElement( 'span', [], $histlink )
 588                         );
 589
 590                         # Tags, if any.
 591                         list( $tagSummary, $newClasses ) = ChangeTags::formatSummaryRow(
 592                                 $row->ts_tags,
 593                                 'contributions',
 594                                 $this->getContext()
 595                         );
 596                         $classes = array_merge( $classes, $newClasses );
 597
 598                         Hooks::run( 'SpecialContributions::formatRow::flags', [ $this->getContext(), $row, &$flags ] );
 599
 600                         $templateParams = [
 601                                 'del' => $del,
 602                                 'timestamp' => $d,
 603                                 'diffHistLinks' => $diffHistLinks,
 604                                 'charDifference' => $chardiff,
 605                                 'flags' => $flags,
 606                                 'articleLink' => $link,
 607                                 'userlink' => $userlink,
 608                                 'logText' => $comment,
 609                                 'topmarktext' => $topmarktext,
 610                                 'tagSummary' => $tagSummary,
 611                         ];
 612
 613                         # Denote if username is redacted for this edit
 614                         if ( $rev->isDeleted( Revision::DELETED_USER ) ) {
 615                                 $templateParams['rev-deleted-user-contribs'] =
 616                                         $this->msg( 'rev-deleted-user-contribs' )->escaped();
 617                         }
 618
 619                         $ret = $this->templateParser->processTemplate(
 620                                 'SpecialContributionsLine',
 621                                 $templateParams
 622                         );
 623                 }
 624
 625                 // Let extensions add data
 626                 Hooks::run( 'ContributionsLineEnding', [ $this, &$ret, $row, &$classes, &$attribs ] );
 627                 $attribs = array_filter( $attribs,
 628                         [ Sanitizer::class, 'isReservedDataAttribute' ],
 629                         ARRAY_FILTER_USE_KEY
 630                 );
 631
 632                 // TODO: Handle exceptions in the catch block above.  Do any extensions rely on
 633                 // receiving empty rows?
 634
 635                 if ( $classes === [] && $attribs === [] && $ret === '' ) {
 636                         wfDebug( "Dropping Special:Contribution row that could not be formatted\n" );
 637                         return "<!-- Could not format Special:Contribution row. -->\n";
 638                 }
 639                 $attribs['class'] = $classes;
 640
 641                 // FIXME: The signature of the ContributionsLineEnding hook makes it
 642                 // very awkward to move this LI wrapper into the template.
 643                 return Html::rawElement( 'li', $attribs, $ret ) . "\n";
 644         }
 645
 646         /**
 647          * Overwrite Pager function and return a helpful comment
 648          * @return string
 649          */
 650         function getSqlComment() {
 651                 if ( $this->namespace || $this->deletedOnly ) {
 652                         // potentially slow, see CR r58153
 653                         return 'contributions page filtered for namespace or RevisionDeleted edits';
 654                 } else {
 655                         return 'contributions page unfiltered';
 656                 }
 657         }
 658
 659         protected function preventClickjacking() {
 660                 $this->preventClickjacking = true;
 661         }
 662
 663         /**
 664          * @return bool
 665          */
 666         public function getPreventClickjacking() {
 667                 return $this->preventClickjacking;
 668         }
 669
 670         /**
 671          * Set up date filter options, given request data.
 672          *
 673          * @param array $opts Options array
 674          * @return array Options array with processed start and end date filter options
 675          */
 676         public static function processDateFilter( array $opts ) {
 677                 $start = $opts['start'] ?? '';
 678                 $end = $opts['end'] ?? '';
 679                 $year = $opts['year'] ?? '';
 680                 $month = $opts['month'] ?? '';
 681
 682                 if ( $start !== '' && $end !== '' && $start > $end ) {
 683                         $temp = $start;
 684                         $start = $end;
 685                         $end = $temp;
 686                 }
 687
 688                 // If year/month legacy filtering options are set, convert them to display the new stamp
 689                 if ( $year !== '' || $month !== '' ) {
 690                         // Reuse getDateCond logic, but subtract a day because
 691                         // the endpoints of our date range appear inclusive
 692                         // but the internal end offsets are always exclusive
 693                         $legacyTimestamp = ReverseChronologicalPager::getOffsetDate( $year, $month );
 694                         $legacyDateTime = new DateTime( $legacyTimestamp->getTimestamp( TS_ISO_8601 ) );
 695                         $legacyDateTime = $legacyDateTime->modify( '-1 day' );
 696
 697                         // Clear the new timestamp range options if used and
 698                         // replace with the converted legacy timestamp
 699                         $start = '';
 700                         $end = $legacyDateTime->format( 'Y-m-d' );
 701                 }
 702
 703                 $opts['start'] = $start;
 704                 $opts['end'] = $end;
 705
 706                 return $opts;
 707         }
 708 }