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         /**
  34          * @var string[] Local cache for escaped messages
  35          */
  36         private $messages;
  37
  38         /**
  39          * @var string User name, or a string describing an IP address range
  40          * @private
  41          * @fixme Make private again after Flow got fixed.
  42          */
  43         public $target;
  44
  45         /**
  46          * @var string Set to "newbie" to list contributions from the most recent 1% registered users.
  47          *  $this->target is ignored then. Defaults to "users".
  48          * @private
  49          * @fixme Make private again after Flow got fixed.
  50          */
  51         public $contribs;
  52
  53         /**
  54          * @var string|int A single namespace number, or an empty string for all namespaces
  55          * @private
  56          * @fixme Make private again after Flow got fixed.
  57          */
  58         public $namespace = '';
  59
  60         /**
  61          * @var string|false Name of tag to filter, or false to ignore tags
  62          * @private
  63          * @fixme Make private again after Flow got fixed.
  64          */
  65         public $tagFilter;
  66
  67         /**
  68          * @var bool Set to true to invert the namespace selection
  69          */
  70         private $nsInvert;
  71
  72         /**
  73          * @var bool Set to true to show both the subject and talk namespace, no matter which got
  74          *  selected
  75          */
  76         private $associated;
  77
  78         /**
  79          * @var bool Set to true to show only deleted revisions
  80          */
  81         private $deletedOnly;
  82
  83         /**
  84          * @var bool Set to true to show only latest (a.k.a. current) revisions
  85          */
  86         private $topOnly;
  87
  88         /**
  89          * @var bool Set to true to show only new pages
  90          * @private
  91          * @fixme Make private again after Flow got fixed.
  92          */
  93         public $newOnly;
  94
  95         /**
  96          * @var bool Set to true to hide edits marked as minor by the user
  97          */
  98         private $hideMinor;
  99
 100         private $preventClickjacking = false;
 101
 102         /** @var IDatabase */
 103         private $mDbSecondary;
 104
 105         /**
 106          * @var array
 107          */
 108         private $mParentLens;
 109
 110         /**
 111          * @var TemplateParser
 112          */
 113         private $templateParser;
 114
 115         public function __construct( IContextSource $context, array $options ) {
 116                 parent::__construct( $context );
 117
 118                 $msgs = [
 119                         'diff',
 120                         'hist',
 121                         'pipe-separator',
 122                         'uctop'
 123                 ];
 124
 125                 foreach ( $msgs as $msg ) {
 126                         $this->messages[$msg] = $this->msg( $msg )->escaped();
 127                 }
 128
 129                 $this->target = $options['target'] ?? '';
 130                 $this->contribs = $options['contribs'] ?? 'users';
 131                 $this->namespace = $options['namespace'] ?? '';
 132                 $this->tagFilter = $options['tagfilter'] ?? false;
 133                 $this->nsInvert = $options['nsInvert'] ?? false;
 134                 $this->associated = $options['associated'] ?? false;
 135
 136                 $this->deletedOnly = !empty( $options['deletedOnly'] );
 137                 $this->topOnly = !empty( $options['topOnly'] );
 138                 $this->newOnly = !empty( $options['newOnly'] );
 139                 $this->hideMinor = !empty( $options['hideMinor'] );
 140
 141                 // Date filtering: use timestamp if available
 142                 $startTimestamp = '';
 143                 $endTimestamp = '';
 144                 if ( $options['start'] ) {
 145                         $startTimestamp = $options['start'] . ' 00:00:00';
 146                 }
 147                 if ( $options['end'] ) {
 148                         $endTimestamp = $options['end'] . ' 23:59:59';
 149                 }
 150                 $this->getDateRangeCond( $startTimestamp, $endTimestamp );
 151
 152                 // Most of this code will use the 'contributions' group DB, which can map to replica DBs
 153                 // with extra user based indexes or partioning by user. The additional metadata
 154                 // queries should use a regular replica DB since the lookup pattern is not all by user.
 155                 $this->mDbSecondary = wfGetDB( DB_REPLICA ); // any random replica DB
 156                 $this->mDb = wfGetDB( DB_REPLICA, 'contributions' );
 157                 $this->templateParser = new TemplateParser();
 158         }
 159
 160         function getDefaultQuery() {
 161                 $query = parent::getDefaultQuery();
 162                 $query['target'] = $this->target;
 163
 164                 return $query;
 165         }
 166
 167         /**
 168          * This method basically executes the exact same code as the parent class, though with
 169          * a hook added, to allow extensions to add additional queries.
 170          *
 171          * @param string $offset Index offset, inclusive
 172          * @param int $limit Exact query limit
 173          * @param bool $descending Query direction, false for ascending, true for descending
 174          * @return IResultWrapper
 175          */
 176         function reallyDoQuery( $offset, $limit, $descending ) {
 177                 list( $tables, $fields, $conds, $fname, $options, $join_conds ) = $this->buildQueryInfo(
 178                         $offset,
 179                         $limit,
 180                         $descending
 181                 );
 182
 183                 /*
 184                  * This hook will allow extensions to add in additional queries, so they can get their data
 185                  * in My Contributions as well. Extensions should append their results to the $data array.
 186                  *
 187                  * Extension queries have to implement the navbar requirement as well. They should
 188                  * - have a column aliased as $pager->getIndexField()
 189                  * - have LIMIT set
 190                  * - have a WHERE-clause that compares the $pager->getIndexField()-equivalent column to the offset
 191                  * - have the ORDER BY specified based upon the details provided by the navbar
 192                  *
 193                  * See includes/Pager.php buildQueryInfo() method on how to build LIMIT, WHERE & ORDER BY
 194                  *
 195                  * &$data: an array of results of all contribs queries
 196                  * $pager: the ContribsPager object hooked into
 197                  * $offset: see phpdoc above
 198                  * $limit: see phpdoc above
 199                  * $descending: see phpdoc above
 200                  */
 201                 $data = [ $this->mDb->select(
 202                         $tables, $fields, $conds, $fname, $options, $join_conds
 203                 ) ];
 204                 Hooks::run(
 205                         'ContribsPager::reallyDoQuery',
 206                         [ &$data, $this, $offset, $limit, $descending ]
 207                 );
 208
 209                 $result = [];
 210
 211                 // loop all results and collect them in an array
 212                 foreach ( $data as $query ) {
 213                         foreach ( $query as $i => $row ) {
 214                                 // use index column as key, allowing us to easily sort in PHP
 215                                 $result[$row->{$this->getIndexField()} . "-$i"] = $row;
 216                         }
 217                 }
 218
 219                 // sort results
 220                 if ( $descending ) {
 221                         ksort( $result );
 222                 } else {
 223                         krsort( $result );
 224                 }
 225
 226                 // enforce limit
 227                 $result = array_slice( $result, 0, $limit );
 228
 229                 // get rid of array keys
 230                 $result = array_values( $result );
 231
 232                 return new FakeResultWrapper( $result );
 233         }
 234
 235         function getQueryInfo() {
 236                 $revQuery = Revision::getQueryInfo( [ 'page', 'user' ] );
 237                 $queryInfo = [
 238                         'tables' => $revQuery['tables'],
 239                         'fields' => array_merge( $revQuery['fields'], [ 'page_is_new' ] ),
 240                         'conds' => [],
 241                         'options' => [],
 242                         'join_conds' => $revQuery['joins'],
 243                 ];
 244
 245                 if ( $this->contribs == 'newbie' ) {
 246                         $max = $this->mDb->selectField( 'user', 'max(user_id)', '', __METHOD__ );
 247                         $queryInfo['conds'][] = $revQuery['fields']['rev_user'] . ' >' . (int)( $max - $max / 100 );
 248                         # ignore local groups with the bot right
 249                         # @todo FIXME: Global groups may have 'bot' rights
 250                         $groupsWithBotPermission = User::getGroupsWithPermission( 'bot' );
 251                         if ( count( $groupsWithBotPermission ) ) {
 252                                 $queryInfo['tables'][] = 'user_groups';
 253                                 $queryInfo['conds'][] = 'ug_group IS NULL';
 254                                 $queryInfo['join_conds']['user_groups'] = [
 255                                         'LEFT JOIN', [
 256                                                 'ug_user = ' . $revQuery['fields']['rev_user'],
 257                                                 'ug_group' => $groupsWithBotPermission,
 258                                                 'ug_expiry IS NULL OR ug_expiry >= ' .
 259                                                         $this->mDb->addQuotes( $this->mDb->timestamp() )
 260                                         ]
 261                                 ];
 262                         }
 263                         // (T140537) Disallow looking too far in the past for 'newbies' queries. If the user requested
 264                         // a timestamp offset far in the past such that there are no edits by users with user_ids in
 265                         // the range, we would end up scanning all revisions from that offset until start of time.
 266                         $queryInfo['conds'][] = 'rev_timestamp > ' .
 267                                 $this->mDb->addQuotes( $this->mDb->timestamp( wfTimestamp() - 30 * 24 * 60 * 60 ) );
 268                 } else {
 269                         $user = User::newFromName( $this->target, false );
 270                         $ipRangeConds = $user->isAnon() ? $this->getIpRangeConds( $this->mDb, $this->target ) : null;
 271                         if ( $ipRangeConds ) {
 272                                 $queryInfo['tables'][] = 'ip_changes';
 273                                 /**
 274                                  * These aliases make `ORDER BY rev_timestamp, rev_id` from {@see getIndexField} and
 275                                  * {@see getExtraSortFields} use the replicated `ipc_rev_timestamp` and `ipc_rev_id`
 276                                  * columns from the `ip_changes` table, for more efficient queries.
 277                                  * @see https://phabricator.wikimedia.org/T200259#4832318
 278                                  */
 279                                 $queryInfo['fields'] = array_merge(
 280                                         [
 281                                                 'rev_timestamp' => 'ipc_rev_timestamp',
 282                                                 'rev_id' => 'ipc_rev_id',
 283                                         ],
 284                                         array_diff( $queryInfo['fields'], [
 285                                                 'rev_timestamp',
 286                                                 'rev_id',
 287                                         ] )
 288                                 );
 289                                 $queryInfo['join_conds']['ip_changes'] = [
 290                                         'LEFT JOIN', [ 'ipc_rev_id = rev_id' ]
 291                                 ];
 292                                 $queryInfo['conds'][] = $ipRangeConds;
 293                         } else {
 294                                 // tables and joins are already handled by Revision::getQueryInfo()
 295                                 $conds = ActorMigration::newMigration()->getWhere( $this->mDb, 'rev_user', $user );
 296                                 $queryInfo['conds'][] = $conds['conds'];
 297                                 // Force the appropriate index to avoid bad query plans (T189026)
 298                                 if ( isset( $conds['orconds']['actor'] ) ) {
 299                                         // @todo: This will need changing when revision_comment_temp goes away
 300                                         $queryInfo['options']['USE INDEX']['temp_rev_user'] = 'actor_timestamp';
 301                                         // Alias 'rev_timestamp' => 'revactor_timestamp' so "ORDER BY rev_timestamp" is interpreted to
 302                                         // use revactor_timestamp instead.
 303                                         $queryInfo['fields'] = array_merge(
 304                                                 array_diff( $queryInfo['fields'], [ 'rev_timestamp' ] ),
 305                                                 [ 'rev_timestamp' => 'revactor_timestamp' ]
 306                                         );
 307                                 } else {
 308                                         $queryInfo['options']['USE INDEX']['revision'] =
 309                                                 isset( $conds['orconds']['userid'] ) ? 'user_timestamp' : 'usertext_timestamp';
 310                                 }
 311                         }
 312                 }
 313
 314                 if ( $this->deletedOnly ) {
 315                         $queryInfo['conds'][] = 'rev_deleted != 0';
 316                 }
 317
 318                 if ( $this->topOnly ) {
 319                         $queryInfo['conds'][] = 'rev_id = page_latest';
 320                 }
 321
 322                 if ( $this->newOnly ) {
 323                         $queryInfo['conds'][] = 'rev_parent_id = 0';
 324                 }
 325
 326                 if ( $this->hideMinor ) {
 327                         $queryInfo['conds'][] = 'rev_minor_edit = 0';
 328                 }
 329
 330                 $user = $this->getUser();
 331                 $queryInfo['conds'] = array_merge( $queryInfo['conds'], $this->getNamespaceCond() );
 332
 333                 // Paranoia: avoid brute force searches (T19342)
 334                 if ( !$user->isAllowed( 'deletedhistory' ) ) {
 335                         $queryInfo['conds'][] = $this->mDb->bitAnd( 'rev_deleted', Revision::DELETED_USER ) . ' = 0';
 336                 } elseif ( !$user->isAllowedAny( 'suppressrevision', 'viewsuppressed' ) ) {
 337                         $queryInfo['conds'][] = $this->mDb->bitAnd( 'rev_deleted', Revision::SUPPRESSED_USER ) .
 338                                 ' != ' . Revision::SUPPRESSED_USER;
 339                 }
 340
 341                 // For IPv6, we use ipc_rev_timestamp on ip_changes as the index field,
 342                 // which will be referenced when parsing the results of a query.
 343                 if ( self::isQueryableRange( $this->target ) ) {
 344                         $queryInfo['fields'][] = 'ipc_rev_timestamp';
 345                 }
 346
 347                 ChangeTags::modifyDisplayQuery(
 348                         $queryInfo['tables'],
 349                         $queryInfo['fields'],
 350                         $queryInfo['conds'],
 351                         $queryInfo['join_conds'],
 352                         $queryInfo['options'],
 353                         $this->tagFilter
 354                 );
 355
 356                 // Avoid PHP 7.1 warning from passing $this by reference
 357                 $pager = $this;
 358                 Hooks::run( 'ContribsPager::getQueryInfo', [ &$pager, &$queryInfo ] );
 359
 360                 return $queryInfo;
 361         }
 362
 363         function getNamespaceCond() {
 364                 if ( $this->namespace !== '' ) {
 365                         $selectedNS = $this->mDb->addQuotes( $this->namespace );
 366                         $eq_op = $this->nsInvert ? '!=' : '=';
 367                         $bool_op = $this->nsInvert ? 'AND' : 'OR';
 368
 369                         if ( !$this->associated ) {
 370                                 return [ "page_namespace $eq_op $selectedNS" ];
 371                         }
 372
 373                         $associatedNS = $this->mDb->addQuotes(
 374                                 MWNamespace::getAssociated( $this->namespace )
 375                         );
 376
 377                         return [
 378                                 "page_namespace $eq_op $selectedNS " .
 379                                 $bool_op .
 380                                 " page_namespace $eq_op $associatedNS"
 381                         ];
 382                 }
 383
 384                 return [];
 385         }
 386
 387         /**
 388          * Get SQL conditions for an IP range, if applicable
 389          * @param IDatabase      $db
 390          * @param string         $ip The IP address or CIDR
 391          * @return string|false  SQL for valid IP ranges, false if invalid
 392          */
 393         private function getIpRangeConds( $db, $ip ) {
 394                 // First make sure it is a valid range and they are not outside the CIDR limit
 395                 if ( !$this->isQueryableRange( $ip ) ) {
 396                         return false;
 397                 }
 398
 399                 list( $start, $end ) = IP::parseRange( $ip );
 400
 401                 return 'ipc_hex BETWEEN ' . $db->addQuotes( $start ) . ' AND ' . $db->addQuotes( $end );
 402         }
 403
 404         /**
 405          * Is the given IP a range and within the CIDR limit?
 406          *
 407          * @param string $ipRange
 408          * @return bool True if it is valid
 409          * @since 1.30
 410          */
 411         public function isQueryableRange( $ipRange ) {
 412                 $limits = $this->getConfig()->get( 'RangeContributionsCIDRLimit' );
 413
 414                 $bits = IP::parseCIDR( $ipRange )[1];
 415                 if (
 416                         ( $bits === false ) ||
 417                         ( IP::isIPv4( $ipRange ) && $bits < $limits['IPv4'] ) ||
 418                         ( IP::isIPv6( $ipRange ) && $bits < $limits['IPv6'] )
 419                 ) {
 420                         return false;
 421                 }
 422
 423                 return true;
 424         }
 425
 426         /**
 427          * @return string
 428          */
 429         public function getIndexField() {
 430                 // Note this is run via parent::__construct() *before* $this->target is set!
 431                 return 'rev_timestamp';
 432         }
 433
 434         /**
 435          * @return false|string
 436          */
 437         public function getTagFilter() {
 438                 return $this->tagFilter;
 439         }
 440
 441         /**
 442          * @return string
 443          */
 444         public function getContribs() {
 445                 return $this->contribs;
 446         }
 447
 448         /**
 449          * @return string
 450          */
 451         public function getTarget() {
 452                 return $this->target;
 453         }
 454
 455         /**
 456          * @return bool
 457          */
 458         public function isNewOnly() {
 459                 return $this->newOnly;
 460         }
 461
 462         /**
 463          * @return int|string
 464          */
 465         public function getNamespace() {
 466                 return $this->namespace;
 467         }
 468
 469         /**
 470          * @return string[]
 471          */
 472         protected function getExtraSortFields() {
 473                 // Note this is run via parent::__construct() *before* $this->target is set!
 474                 return [ 'rev_id' ];
 475         }
 476
 477         protected function doBatchLookups() {
 478                 # Do a link batch query
 479                 $this->mResult->seek( 0 );
 480                 $parentRevIds = [];
 481                 $this->mParentLens = [];
 482                 $batch = new LinkBatch();
 483                 $isIpRange = $this->isQueryableRange( $this->target );
 484                 # Give some pointers to make (last) links
 485                 foreach ( $this->mResult as $row ) {
 486                         if ( isset( $row->rev_parent_id ) && $row->rev_parent_id ) {
 487                                 $parentRevIds[] = $row->rev_parent_id;
 488                         }
 489                         if ( isset( $row->rev_id ) ) {
 490                                 $this->mParentLens[$row->rev_id] = $row->rev_len;
 491                                 if ( $this->contribs === 'newbie' ) { // multiple users
 492                                         $batch->add( NS_USER, $row->user_name );
 493                                         $batch->add( NS_USER_TALK, $row->user_name );
 494                                 } elseif ( $isIpRange ) {
 495                                         // If this is an IP range, batch the IP's talk page
 496                                         $batch->add( NS_USER_TALK, $row->rev_user_text );
 497                                 }
 498                                 $batch->add( $row->page_namespace, $row->page_title );
 499                         }
 500                 }
 501                 # Fetch rev_len for revisions not already scanned above
 502                 $this->mParentLens += Revision::getParentLengths(
 503                         $this->mDbSecondary,
 504                         array_diff( $parentRevIds, array_keys( $this->mParentLens ) )
 505                 );
 506                 $batch->execute();
 507                 $this->mResult->seek( 0 );
 508         }
 509
 510         /**
 511          * @return string
 512          */
 513         protected function getStartBody() {
 514                 return "<ul class=\"mw-contributions-list\">\n";
 515         }
 516
 517         /**
 518          * @return string
 519          */
 520         protected function getEndBody() {
 521                 return "</ul>\n";
 522         }
 523
 524         /**
 525          * Check whether the revision associated is valid for formatting. If has no associated revision
 526          * id then null is returned.
 527          *
 528          * @param object $row
 529          * @param Title|null $title
 530          * @return Revision|null
 531          */
 532         public function tryToCreateValidRevision( $row, $title = null ) {
 533                 /*
 534                  * There may be more than just revision rows. To make sure that we'll only be processing
 535                  * revisions here, let's _try_ to build a revision out of our row (without displaying
 536                  * notices though) and then trying to grab data from the built object. If we succeed,
 537                  * we're definitely dealing with revision data and we may proceed, if not, we'll leave it
 538                  * to extensions to subscribe to the hook to parse the row.
 539                  */
 540                 Wikimedia\suppressWarnings();
 541                 try {
 542                         $rev = new Revision( $row, 0, $title );
 543                         $validRevision = (bool)$rev->getId();
 544                 } catch ( Exception $e ) {
 545                         $validRevision = false;
 546                 }
 547                 Wikimedia\restoreWarnings();
 548                 return $validRevision ? $rev : null;
 549         }
 550
 551         /**
 552          * Generates each row in the contributions list.
 553          *
 554          * Contributions which are marked "top" are currently on top of the history.
 555          * For these contributions, a [rollback] link is shown for users with roll-
 556          * back privileges. The rollback link restores the most recent version that
 557          * was not written by the target user.
 558          *
 559          * @todo This would probably look a lot nicer in a table.
 560          * @param object $row
 561          * @return string
 562          */
 563         function formatRow( $row ) {
 564                 $ret = '';
 565                 $classes = [];
 566                 $attribs = [];
 567
 568                 $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
 569
 570                 $page = null;
 571                 // Create a title for the revision if possible
 572                 // Rows from the hook may not include title information
 573                 if ( isset( $row->page_namespace ) && isset( $row->page_title ) ) {
 574                         $page = Title::newFromRow( $row );
 575                 }
 576                 $rev = $this->tryToCreateValidRevision( $row, $page );
 577                 if ( $rev ) {
 578                         $attribs['data-mw-revid'] = $rev->getId();
 579
 580                         $link = $linkRenderer->makeLink(
 581                                 $page,
 582                                 $page->getPrefixedText(),
 583                                 [ 'class' => 'mw-contributions-title' ],
 584                                 $page->isRedirect() ? [ 'redirect' => 'no' ] : []
 585                         );
 586                         # Mark current revisions
 587                         $topmarktext = '';
 588                         $user = $this->getUser();
 589
 590                         if ( $row->rev_id === $row->page_latest ) {
 591                                 $topmarktext .= '<span class="mw-uctop">' . $this->messages['uctop'] . '</span>';
 592                                 $classes[] = 'mw-contributions-current';
 593                                 # Add rollback link
 594                                 if ( !$row->page_is_new && $page->quickUserCan( 'rollback', $user )
 595                                         && $page->quickUserCan( 'edit', $user )
 596                                 ) {
 597                                         $this->preventClickjacking();
 598                                         $topmarktext .= ' ' . Linker::generateRollback( $rev, $this->getContext() );
 599                                 }
 600                         }
 601                         # Is there a visible previous revision?
 602                         if ( $rev->userCan( Revision::DELETED_TEXT, $user ) && $rev->getParentId() !== 0 ) {
 603                                 $difftext = $linkRenderer->makeKnownLink(
 604                                         $page,
 605                                         new HtmlArmor( $this->messages['diff'] ),
 606                                         [ 'class' => 'mw-changeslist-diff' ],
 607                                         [
 608                                                 'diff' => 'prev',
 609                                                 'oldid' => $row->rev_id
 610                                         ]
 611                                 );
 612                         } else {
 613                                 $difftext = $this->messages['diff'];
 614                         }
 615                         $histlink = $linkRenderer->makeKnownLink(
 616                                 $page,
 617                                 new HtmlArmor( $this->messages['hist'] ),
 618                                 [ 'class' => 'mw-changeslist-history' ],
 619                                 [ 'action' => 'history' ]
 620                         );
 621
 622                         if ( $row->rev_parent_id === null ) {
 623                                 // For some reason rev_parent_id isn't populated for this row.
 624                                 // Its rumoured this is true on wikipedia for some revisions (T36922).
 625                                 // Next best thing is to have the total number of bytes.
 626                                 $chardiff = ' <span class="mw-changeslist-separator"></span> ';
 627                                 $chardiff .= Linker::formatRevisionSize( $row->rev_len );
 628                                 $chardiff .= ' <span class="mw-changeslist-separator"></span> ';
 629                         } else {
 630                                 $parentLen = 0;
 631                                 if ( isset( $this->mParentLens[$row->rev_parent_id] ) ) {
 632                                         $parentLen = $this->mParentLens[$row->rev_parent_id];
 633                                 }
 634
 635                                 $chardiff = ' <span class="mw-changeslist-separator"></span> ';
 636                                 $chardiff .= ChangesList::showCharacterDifference(
 637                                         $parentLen,
 638                                         $row->rev_len,
 639                                         $this->getContext()
 640                                 );
 641                                 $chardiff .= ' <span class="mw-changeslist-separator"></span> ';
 642                         }
 643
 644                         $lang = $this->getLanguage();
 645                         $comment = $lang->getDirMark() . Linker::revComment( $rev, false, true, false );
 646                         $date = $lang->userTimeAndDate( $row->rev_timestamp, $user );
 647                         if ( $rev->userCan( Revision::DELETED_TEXT, $user ) ) {
 648                                 $d = $linkRenderer->makeKnownLink(
 649                                         $page,
 650                                         $date,
 651                                         [ 'class' => 'mw-changeslist-date' ],
 652                                         [ 'oldid' => intval( $row->rev_id ) ]
 653                                 );
 654                         } else {
 655                                 $d = htmlspecialchars( $date );
 656                         }
 657                         if ( $rev->isDeleted( Revision::DELETED_TEXT ) ) {
 658                                 $d = '<span class="history-deleted">' . $d . '</span>';
 659                         }
 660
 661                         # Show user names for /newbies as there may be different users.
 662                         # Note that only unprivileged users have rows with hidden user names excluded.
 663                         # When querying for an IP range, we want to always show user and user talk links.
 664                         $userlink = '';
 665                         if ( ( $this->contribs == 'newbie' && !$rev->isDeleted( Revision::DELETED_USER ) )
 666                                 || $this->isQueryableRange( $this->target ) ) {
 667                                 $userlink = ' <span class="mw-changeslist-separator"></span> '
 668                                         . $lang->getDirMark()
 669                                         . Linker::userLink( $rev->getUser(), $rev->getUserText() );
 670                                 $userlink .= ' ' . $this->msg( 'parentheses' )->rawParams(
 671                                         Linker::userTalkLink( $rev->getUser(), $rev->getUserText() ) )->escaped() . ' ';
 672                         }
 673
 674                         $flags = [];
 675                         if ( $rev->getParentId() === 0 ) {
 676                                 $flags[] = ChangesList::flag( 'newpage' );
 677                         }
 678
 679                         if ( $rev->isMinor() ) {
 680                                 $flags[] = ChangesList::flag( 'minor' );
 681                         }
 682
 683                         $del = Linker::getRevDeleteLink( $user, $rev, $page );
 684                         if ( $del !== '' ) {
 685                                 $del .= ' ';
 686                         }
 687
 688                         // While it might be tempting to use a list here
 689                         // this would result in clutter and slows down navigating the content
 690                         // in assistive technology.
 691                         // See https://phabricator.wikimedia.org/T205581#4734812
 692                         $diffHistLinks = Html::rawElement( 'span',
 693                                 [ 'class' => 'mw-changeslist-links' ],
 694                                 // The spans are needed to ensure the dividing '|' elements are not
 695                                 // themselves styled as links.
 696                                 Html::rawElement( 'span', [], $difftext ) .
 697                                 ' ' . // Space needed for separating two words.
 698                                 Html::rawElement( 'span', [], $histlink )
 699                         );
 700
 701                         # Tags, if any.
 702                         list( $tagSummary, $newClasses ) = ChangeTags::formatSummaryRow(
 703                                 $row->ts_tags,
 704                                 'contributions',
 705                                 $this->getContext()
 706                         );
 707                         $classes = array_merge( $classes, $newClasses );
 708
 709                         Hooks::run( 'SpecialContributions::formatRow::flags', [ $this->getContext(), $row, &$flags ] );
 710
 711                         $templateParams = [
 712                                 'del' => $del,
 713                                 'timestamp' => $d,
 714                                 'diffHistLinks' => $diffHistLinks,
 715                                 'charDifference' => $chardiff,
 716                                 'flags' => $flags,
 717                                 'articleLink' => $link,
 718                                 'userlink' => $userlink,
 719                                 'logText' => $comment,
 720                                 'topmarktext' => $topmarktext,
 721                                 'tagSummary' => $tagSummary,
 722                         ];
 723
 724                         # Denote if username is redacted for this edit
 725                         if ( $rev->isDeleted( Revision::DELETED_USER ) ) {
 726                                 $templateParams['rev-deleted-user-contribs'] =
 727                                         $this->msg( 'rev-deleted-user-contribs' )->escaped();
 728                         }
 729
 730                         $ret = $this->templateParser->processTemplate(
 731                                 'SpecialContributionsLine',
 732                                 $templateParams
 733                         );
 734                 }
 735
 736                 // Let extensions add data
 737                 Hooks::run( 'ContributionsLineEnding', [ $this, &$ret, $row, &$classes, &$attribs ] );
 738                 $attribs = array_filter( $attribs,
 739                         [ Sanitizer::class, 'isReservedDataAttribute' ],
 740                         ARRAY_FILTER_USE_KEY
 741                 );
 742
 743                 // TODO: Handle exceptions in the catch block above.  Do any extensions rely on
 744                 // receiving empty rows?
 745
 746                 if ( $classes === [] && $attribs === [] && $ret === '' ) {
 747                         wfDebug( "Dropping Special:Contribution row that could not be formatted\n" );
 748                         return "<!-- Could not format Special:Contribution row. -->\n";
 749                 }
 750                 $attribs['class'] = $classes;
 751
 752                 // FIXME: The signature of the ContributionsLineEnding hook makes it
 753                 // very awkward to move this LI wrapper into the template.
 754                 return Html::rawElement( 'li', $attribs, $ret ) . "\n";
 755         }
 756
 757         /**
 758          * Overwrite Pager function and return a helpful comment
 759          * @return string
 760          */
 761         function getSqlComment() {
 762                 if ( $this->namespace || $this->deletedOnly ) {
 763                         // potentially slow, see CR r58153
 764                         return 'contributions page filtered for namespace or RevisionDeleted edits';
 765                 } else {
 766                         return 'contributions page unfiltered';
 767                 }
 768         }
 769
 770         protected function preventClickjacking() {
 771                 $this->preventClickjacking = true;
 772         }
 773
 774         /**
 775          * @return bool
 776          */
 777         public function getPreventClickjacking() {
 778                 return $this->preventClickjacking;
 779         }
 780
 781         /**
 782          * Set up date filter options, given request data.
 783          *
 784          * @param array $opts Options array
 785          * @return array Options array with processed start and end date filter options
 786          */
 787         public static function processDateFilter( array $opts ) {
 788                 $start = $opts['start'] ?? '';
 789                 $end = $opts['end'] ?? '';
 790                 $year = $opts['year'] ?? '';
 791                 $month = $opts['month'] ?? '';
 792
 793                 if ( $start !== '' && $end !== '' && $start > $end ) {
 794                         $temp = $start;
 795                         $start = $end;
 796                         $end = $temp;
 797                 }
 798
 799                 // If year/month legacy filtering options are set, convert them to display the new stamp
 800                 if ( $year !== '' || $month !== '' ) {
 801                         // Reuse getDateCond logic, but subtract a day because
 802                         // the endpoints of our date range appear inclusive
 803                         // but the internal end offsets are always exclusive
 804                         $legacyTimestamp = ReverseChronologicalPager::getOffsetDate( $year, $month );
 805                         $legacyDateTime = new DateTime( $legacyTimestamp->getTimestamp( TS_ISO_8601 ) );
 806                         $legacyDateTime = $legacyDateTime->modify( '-1 day' );
 807
 808                         // Clear the new timestamp range options if used and
 809                         // replace with the converted legacy timestamp
 810                         $start = '';
 811                         $end = $legacyDateTime->format( 'Y-m-d' );
 812                 }
 813
 814                 $opts['start'] = $start;
 815                 $opts['end'] = $end;
 816
 817                 return $opts;
 818         }
 819 }