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\Storage\RevisionRecord;
  28 use Wikimedia\Rdbms\IResultWrapper;
  29 use Wikimedia\Rdbms\FakeResultWrapper;
  30 use Wikimedia\Rdbms\IDatabase;
  31
  32 class ContribsPager extends RangeChronologicalPager {
  33
  34         /**
  35          * @var string[] Local cache for escaped messages
  36          */
  37         private $messages;
  38
  39         /**
  40          * @var string User name, or a string describing an IP address range
  41          */
  42         private $target;
  43
  44         /**
  45          * @var string|int A single namespace number, or an empty string for all namespaces
  46          */
  47         private $namespace = '';
  48
  49         /**
  50          * @var string|false Name of tag to filter, or false to ignore tags
  51          */
  52         private $tagFilter;
  53
  54         /**
  55          * @var bool Set to true to invert the namespace selection
  56          */
  57         private $nsInvert;
  58
  59         /**
  60          * @var bool Set to true to show both the subject and talk namespace, no matter which got
  61          *  selected
  62          */
  63         private $associated;
  64
  65         /**
  66          * @var bool Set to true to show only deleted revisions
  67          */
  68         private $deletedOnly;
  69
  70         /**
  71          * @var bool Set to true to show only latest (a.k.a. current) revisions
  72          */
  73         private $topOnly;
  74
  75         /**
  76          * @var bool Set to true to show only new pages
  77          */
  78         private $newOnly;
  79
  80         /**
  81          * @var bool Set to true to hide edits marked as minor by the user
  82          */
  83         private $hideMinor;
  84
  85         private $preventClickjacking = false;
  86
  87         /** @var IDatabase */
  88         private $mDbSecondary;
  89
  90         /**
  91          * @var array
  92          */
  93         private $mParentLens;
  94
  95         /**
  96          * @var TemplateParser
  97          */
  98         private $templateParser;
  99
 100         public function __construct( IContextSource $context, array $options ) {
 101                 // Set ->target before calling parent::__construct() so
 102                 // parent can call $this->getIndexField() and get the right result. Set
 103                 // the rest too just to keep things simple.
 104                 $this->target = $options['target'] ?? '';
 105                 $this->namespace = $options['namespace'] ?? '';
 106                 $this->tagFilter = $options['tagfilter'] ?? false;
 107                 $this->nsInvert = $options['nsInvert'] ?? false;
 108                 $this->associated = $options['associated'] ?? false;
 109
 110                 $this->deletedOnly = !empty( $options['deletedOnly'] );
 111                 $this->topOnly = !empty( $options['topOnly'] );
 112                 $this->newOnly = !empty( $options['newOnly'] );
 113                 $this->hideMinor = !empty( $options['hideMinor'] );
 114
 115                 parent::__construct( $context );
 116
 117                 $msgs = [
 118                         'diff',
 119                         'hist',
 120                         'pipe-separator',
 121                         'uctop'
 122                 ];
 123
 124                 foreach ( $msgs as $msg ) {
 125                         $this->messages[$msg] = $this->msg( $msg )->escaped();
 126                 }
 127
 128                 // Date filtering: use timestamp if available
 129                 $startTimestamp = '';
 130                 $endTimestamp = '';
 131                 if ( $options['start'] ) {
 132                         $startTimestamp = $options['start'] . ' 00:00:00';
 133                 }
 134                 if ( $options['end'] ) {
 135                         $endTimestamp = $options['end'] . ' 23:59:59';
 136                 }
 137                 $this->getDateRangeCond( $startTimestamp, $endTimestamp );
 138
 139                 // Most of this code will use the 'contributions' group DB, which can map to replica DBs
 140                 // with extra user based indexes or partioning by user. The additional metadata
 141                 // queries should use a regular replica DB since the lookup pattern is not all by user.
 142                 $this->mDbSecondary = wfGetDB( DB_REPLICA ); // any random replica DB
 143                 $this->mDb = wfGetDB( DB_REPLICA, 'contributions' );
 144                 $this->templateParser = new TemplateParser();
 145         }
 146
 147         function getDefaultQuery() {
 148                 $query = parent::getDefaultQuery();
 149                 $query['target'] = $this->target;
 150
 151                 return $query;
 152         }
 153
 154         /**
 155          * Wrap the navigation bar in a p element with identifying class.
 156          * In future we may want to change the `p` tag to a `div` and upstream
 157          * this to the parent class.
 158          *
 159          * @return string HTML
 160          */
 161         function getNavigationBar() {
 162                 return Html::rawElement( 'p', [ 'class' => 'mw-pager-navigation-bar' ],
 163                         parent::getNavigationBar()
 164                 );
 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 $order IndexPager::QUERY_ASCENDING or IndexPager::QUERY_DESCENDING
 174          * @return IResultWrapper
 175          */
 176         function reallyDoQuery( $offset, $limit, $order ) {
 177                 list( $tables, $fields, $conds, $fname, $options, $join_conds ) = $this->buildQueryInfo(
 178                         $offset,
 179                         $limit,
 180                         $order
 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, $order ]
 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 ( $order === self::QUERY_ASCENDING ) {
 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         /**
 236          * Return the table targeted for ordering and continuation
 237          *
 238          * See T200259 and T221380.
 239          *
 240          * @warning Keep this in sync with self::getQueryInfo()!
 241          *
 242          * @return string
 243          */
 244         private function getTargetTable() {
 245                 $user = User::newFromName( $this->target, false );
 246                 $ipRangeConds = $user->isAnon() ? $this->getIpRangeConds( $this->mDb, $this->target ) : null;
 247                 if ( $ipRangeConds ) {
 248                         return 'ip_changes';
 249                 } else {
 250                         $conds = ActorMigration::newMigration()->getWhere( $this->mDb, 'rev_user', $user );
 251                         if ( isset( $conds['orconds']['actor'] ) ) {
 252                                 // @todo: This will need changing when revision_actor_temp goes away
 253                                 return 'revision_actor_temp';
 254                         }
 255                 }
 256
 257                 return 'revision';
 258         }
 259
 260         function getQueryInfo() {
 261                 $revQuery = Revision::getQueryInfo( [ 'page', 'user' ] );
 262                 $queryInfo = [
 263                         'tables' => $revQuery['tables'],
 264                         'fields' => array_merge( $revQuery['fields'], [ 'page_is_new' ] ),
 265                         'conds' => [],
 266                         'options' => [],
 267                         'join_conds' => $revQuery['joins'],
 268                 ];
 269
 270                 // WARNING: Keep this in sync with getTargetTable()!
 271                 $user = User::newFromName( $this->target, false );
 272                 $ipRangeConds = $user->isAnon() ? $this->getIpRangeConds( $this->mDb, $this->target ) : null;
 273                 if ( $ipRangeConds ) {
 274                         $queryInfo['tables'][] = 'ip_changes';
 275                         $queryInfo['join_conds']['ip_changes'] = [
 276                                 'LEFT JOIN', [ 'ipc_rev_id = rev_id' ]
 277                         ];
 278                         $queryInfo['conds'][] = $ipRangeConds;
 279                 } else {
 280                         // tables and joins are already handled by Revision::getQueryInfo()
 281                         $conds = ActorMigration::newMigration()->getWhere( $this->mDb, 'rev_user', $user );
 282                         $queryInfo['conds'][] = $conds['conds'];
 283                         // Force the appropriate index to avoid bad query plans (T189026)
 284                         if ( isset( $conds['orconds']['actor'] ) ) {
 285                                 // @todo: This will need changing when revision_actor_temp goes away
 286                                 $queryInfo['options']['USE INDEX']['temp_rev_user'] = 'actor_timestamp';
 287                         } else {
 288                                 $queryInfo['options']['USE INDEX']['revision'] =
 289                                         isset( $conds['orconds']['userid'] ) ? 'user_timestamp' : 'usertext_timestamp';
 290                         }
 291                 }
 292
 293                 if ( $this->deletedOnly ) {
 294                         $queryInfo['conds'][] = 'rev_deleted != 0';
 295                 }
 296
 297                 if ( $this->topOnly ) {
 298                         $queryInfo['conds'][] = 'rev_id = page_latest';
 299                 }
 300
 301                 if ( $this->newOnly ) {
 302                         $queryInfo['conds'][] = 'rev_parent_id = 0';
 303                 }
 304
 305                 if ( $this->hideMinor ) {
 306                         $queryInfo['conds'][] = 'rev_minor_edit = 0';
 307                 }
 308
 309                 $user = $this->getUser();
 310                 $queryInfo['conds'] = array_merge( $queryInfo['conds'], $this->getNamespaceCond() );
 311
 312                 // Paranoia: avoid brute force searches (T19342)
 313                 if ( !$user->isAllowed( 'deletedhistory' ) ) {
 314                         $queryInfo['conds'][] = $this->mDb->bitAnd(
 315                                 'rev_deleted', RevisionRecord::DELETED_USER
 316                                 ) . ' = 0';
 317                 } elseif ( !MediaWikiServices::getInstance()
 318                         ->getPermissionManager()
 319                         ->userHasAnyRight( $user, 'suppressrevision', 'viewsuppressed' )
 320                 ) {
 321                         $queryInfo['conds'][] = $this->mDb->bitAnd(
 322                                 'rev_deleted', RevisionRecord::SUPPRESSED_USER
 323                                 ) . ' != ' . RevisionRecord::SUPPRESSED_USER;
 324                 }
 325
 326                 // $this->getIndexField() must be in the result rows, as reallyDoQuery() tries to access it.
 327                 $indexField = $this->getIndexField();
 328                 if ( $indexField !== 'rev_timestamp' ) {
 329                         $queryInfo['fields'][] = $indexField;
 330                 }
 331
 332                 ChangeTags::modifyDisplayQuery(
 333                         $queryInfo['tables'],
 334                         $queryInfo['fields'],
 335                         $queryInfo['conds'],
 336                         $queryInfo['join_conds'],
 337                         $queryInfo['options'],
 338                         $this->tagFilter
 339                 );
 340
 341                 // Avoid PHP 7.1 warning from passing $this by reference
 342                 $pager = $this;
 343                 Hooks::run( 'ContribsPager::getQueryInfo', [ &$pager, &$queryInfo ] );
 344
 345                 return $queryInfo;
 346         }
 347
 348         function getNamespaceCond() {
 349                 if ( $this->namespace !== '' ) {
 350                         $selectedNS = $this->mDb->addQuotes( $this->namespace );
 351                         $eq_op = $this->nsInvert ? '!=' : '=';
 352                         $bool_op = $this->nsInvert ? 'AND' : 'OR';
 353
 354                         if ( !$this->associated ) {
 355                                 return [ "page_namespace $eq_op $selectedNS" ];
 356                         }
 357
 358                         $associatedNS = $this->mDb->addQuotes(
 359                                 MediaWikiServices::getInstance()->getNamespaceInfo()->getAssociated( $this->namespace )
 360                         );
 361
 362                         return [
 363                                 "page_namespace $eq_op $selectedNS " .
 364                                 $bool_op .
 365                                 " page_namespace $eq_op $associatedNS"
 366                         ];
 367                 }
 368
 369                 return [];
 370         }
 371
 372         /**
 373          * Get SQL conditions for an IP range, if applicable
 374          * @param IDatabase      $db
 375          * @param string         $ip The IP address or CIDR
 376          * @return string|false  SQL for valid IP ranges, false if invalid
 377          */
 378         private function getIpRangeConds( $db, $ip ) {
 379                 // First make sure it is a valid range and they are not outside the CIDR limit
 380                 if ( !$this->isQueryableRange( $ip ) ) {
 381                         return false;
 382                 }
 383
 384                 list( $start, $end ) = IP::parseRange( $ip );
 385
 386                 return 'ipc_hex BETWEEN ' . $db->addQuotes( $start ) . ' AND ' . $db->addQuotes( $end );
 387         }
 388
 389         /**
 390          * Is the given IP a range and within the CIDR limit?
 391          *
 392          * @param string $ipRange
 393          * @return bool True if it is valid
 394          * @since 1.30
 395          */
 396         public function isQueryableRange( $ipRange ) {
 397                 $limits = $this->getConfig()->get( 'RangeContributionsCIDRLimit' );
 398
 399                 $bits = IP::parseCIDR( $ipRange )[1];
 400                 if (
 401                         ( $bits === false ) ||
 402                         ( IP::isIPv4( $ipRange ) && $bits < $limits['IPv4'] ) ||
 403                         ( IP::isIPv6( $ipRange ) && $bits < $limits['IPv6'] )
 404                 ) {
 405                         return false;
 406                 }
 407
 408                 return true;
 409         }
 410
 411         /**
 412          * @return string
 413          */
 414         public function getIndexField() {
 415                 // The returned column is used for sorting and continuation, so we need to
 416                 // make sure to use the right denormalized column depending on which table is
 417                 // being targeted by the query to avoid bad query plans.
 418                 // See T200259, T204669, T220991, and T221380.
 419                 $target = $this->getTargetTable();
 420                 switch ( $target ) {
 421                         case 'revision':
 422                                 return 'rev_timestamp';
 423                         case 'ip_changes':
 424                                 return 'ipc_rev_timestamp';
 425                         case 'revision_actor_temp':
 426                                 return 'revactor_timestamp';
 427                         default:
 428                                 wfWarn(
 429                                         __METHOD__ . ": Unknown value '$target' from " . static::class . '::getTargetTable()', 0
 430                                 );
 431                                 return 'rev_timestamp';
 432                 }
 433         }
 434
 435         /**
 436          * @return false|string
 437          */
 438         public function getTagFilter() {
 439                 return $this->tagFilter;
 440         }
 441
 442         /**
 443          * @deprecated since 1.34, redundant.
 444          *
 445          * @return string "users"
 446          */
 447         public function getContribs() {
 448                 // Brought back for backwards compatibility, see T231540.
 449                 return 'users';
 450         }
 451
 452         /**
 453          * @return string
 454          */
 455         public function getTarget() {
 456                 return $this->target;
 457         }
 458
 459         /**
 460          * @return bool
 461          */
 462         public function isNewOnly() {
 463                 return $this->newOnly;
 464         }
 465
 466         /**
 467          * @return int|string
 468          */
 469         public function getNamespace() {
 470                 return $this->namespace;
 471         }
 472
 473         /**
 474          * @return string[]
 475          */
 476         protected function getExtraSortFields() {
 477                 // The returned columns are used for sorting, so we need to make sure
 478                 // to use the right denormalized column depending on which table is
 479                 // being targeted by the query to avoid bad query plans.
 480                 // See T200259, T204669, T220991, and T221380.
 481                 $target = $this->getTargetTable();
 482                 switch ( $target ) {
 483                         case 'revision':
 484                                 return [ 'rev_id' ];
 485                         case 'ip_changes':
 486                                 return [ 'ipc_rev_id' ];
 487                         case 'revision_actor_temp':
 488                                 return [ 'revactor_rev' ];
 489                         default:
 490                                 wfWarn(
 491                                         __METHOD__ . ": Unknown value '$target' from " . static::class . '::getTargetTable()', 0
 492                                 );
 493                                 return [ 'rev_id' ];
 494                 }
 495         }
 496
 497         protected function doBatchLookups() {
 498                 # Do a link batch query
 499                 $this->mResult->seek( 0 );
 500                 $parentRevIds = [];
 501                 $this->mParentLens = [];
 502                 $batch = new LinkBatch();
 503                 $isIpRange = $this->isQueryableRange( $this->target );
 504                 # Give some pointers to make (last) links
 505                 foreach ( $this->mResult as $row ) {
 506                         if ( isset( $row->rev_parent_id ) && $row->rev_parent_id ) {
 507                                 $parentRevIds[] = $row->rev_parent_id;
 508                         }
 509                         if ( isset( $row->rev_id ) ) {
 510                                 $this->mParentLens[$row->rev_id] = $row->rev_len;
 511                                 if ( $isIpRange ) {
 512                                         // If this is an IP range, batch the IP's talk page
 513                                         $batch->add( NS_USER_TALK, $row->rev_user_text );
 514                                 }
 515                                 $batch->add( $row->page_namespace, $row->page_title );
 516                         }
 517                 }
 518                 # Fetch rev_len for revisions not already scanned above
 519                 $this->mParentLens += Revision::getParentLengths(
 520                         $this->mDbSecondary,
 521                         array_diff( $parentRevIds, array_keys( $this->mParentLens ) )
 522                 );
 523                 $batch->execute();
 524                 $this->mResult->seek( 0 );
 525         }
 526
 527         /**
 528          * @return string
 529          */
 530         protected function getStartBody() {
 531                 return "<ul class=\"mw-contributions-list\">\n";
 532         }
 533
 534         /**
 535          * @return string
 536          */
 537         protected function getEndBody() {
 538                 return "</ul>\n";
 539         }
 540
 541         /**
 542          * Check whether the revision associated is valid for formatting. If has no associated revision
 543          * id then null is returned.
 544          *
 545          * @param object $row
 546          * @param Title|null $title
 547          * @return Revision|null
 548          */
 549         public function tryToCreateValidRevision( $row, $title = null ) {
 550                 /*
 551                  * There may be more than just revision rows. To make sure that we'll only be processing
 552                  * revisions here, let's _try_ to build a revision out of our row (without displaying
 553                  * notices though) and then trying to grab data from the built object. If we succeed,
 554                  * we're definitely dealing with revision data and we may proceed, if not, we'll leave it
 555                  * to extensions to subscribe to the hook to parse the row.
 556                  */
 557                 Wikimedia\suppressWarnings();
 558                 try {
 559                         $rev = new Revision( $row, 0, $title );
 560                         $validRevision = (bool)$rev->getId();
 561                 } catch ( Exception $e ) {
 562                         $validRevision = false;
 563                 }
 564                 Wikimedia\restoreWarnings();
 565                 return $validRevision ? $rev : null;
 566         }
 567
 568         /**
 569          * Generates each row in the contributions list.
 570          *
 571          * Contributions which are marked "top" are currently on top of the history.
 572          * For these contributions, a [rollback] link is shown for users with roll-
 573          * back privileges. The rollback link restores the most recent version that
 574          * was not written by the target user.
 575          *
 576          * @todo This would probably look a lot nicer in a table.
 577          * @param object $row
 578          * @return string
 579          */
 580         function formatRow( $row ) {
 581                 $ret = '';
 582                 $classes = [];
 583                 $attribs = [];
 584
 585                 $linkRenderer = $this->getLinkRenderer();
 586                 $permissionManager = MediaWikiServices::getInstance()->getPermissionManager();
 587
 588                 $page = null;
 589                 // Create a title for the revision if possible
 590                 // Rows from the hook may not include title information
 591                 if ( isset( $row->page_namespace ) && isset( $row->page_title ) ) {
 592                         $page = Title::newFromRow( $row );
 593                 }
 594                 $rev = $this->tryToCreateValidRevision( $row, $page );
 595                 if ( $rev ) {
 596                         $attribs['data-mw-revid'] = $rev->getId();
 597
 598                         $link = $linkRenderer->makeLink(
 599                                 $page,
 600                                 $page->getPrefixedText(),
 601                                 [ 'class' => 'mw-contributions-title' ],
 602                                 $page->isRedirect() ? [ 'redirect' => 'no' ] : []
 603                         );
 604                         # Mark current revisions
 605                         $topmarktext = '';
 606                         $user = $this->getUser();
 607
 608                         if ( $row->rev_id === $row->page_latest ) {
 609                                 $topmarktext .= '<span class="mw-uctop">' . $this->messages['uctop'] . '</span>';
 610                                 $classes[] = 'mw-contributions-current';
 611                                 # Add rollback link
 612                                 if ( !$row->page_is_new &&
 613                                         $permissionManager->quickUserCan( 'rollback', $user, $page ) &&
 614                                         $permissionManager->quickUserCan( 'edit', $user, $page )
 615                                 ) {
 616                                         $this->preventClickjacking();
 617                                         $topmarktext .= ' ' . Linker::generateRollback( $rev, $this->getContext(),
 618                                                 [ 'noBrackets' ] );
 619                                 }
 620                         }
 621                         # Is there a visible previous revision?
 622                         if ( $rev->userCan( RevisionRecord::DELETED_TEXT, $user ) && $rev->getParentId() !== 0 ) {
 623                                 $difftext = $linkRenderer->makeKnownLink(
 624                                         $page,
 625                                         new HtmlArmor( $this->messages['diff'] ),
 626                                         [ 'class' => 'mw-changeslist-diff' ],
 627                                         [
 628                                                 'diff' => 'prev',
 629                                                 'oldid' => $row->rev_id
 630                                         ]
 631                                 );
 632                         } else {
 633                                 $difftext = $this->messages['diff'];
 634                         }
 635                         $histlink = $linkRenderer->makeKnownLink(
 636                                 $page,
 637                                 new HtmlArmor( $this->messages['hist'] ),
 638                                 [ 'class' => 'mw-changeslist-history' ],
 639                                 [ 'action' => 'history' ]
 640                         );
 641
 642                         if ( $row->rev_parent_id === null ) {
 643                                 // For some reason rev_parent_id isn't populated for this row.
 644                                 // Its rumoured this is true on wikipedia for some revisions (T36922).
 645                                 // Next best thing is to have the total number of bytes.
 646                                 $chardiff = ' <span class="mw-changeslist-separator"></span> ';
 647                                 $chardiff .= Linker::formatRevisionSize( $row->rev_len );
 648                                 $chardiff .= ' <span class="mw-changeslist-separator"></span> ';
 649                         } else {
 650                                 $parentLen = 0;
 651                                 if ( isset( $this->mParentLens[$row->rev_parent_id] ) ) {
 652                                         $parentLen = $this->mParentLens[$row->rev_parent_id];
 653                                 }
 654
 655                                 $chardiff = ' <span class="mw-changeslist-separator"></span> ';
 656                                 $chardiff .= ChangesList::showCharacterDifference(
 657                                         $parentLen,
 658                                         $row->rev_len,
 659                                         $this->getContext()
 660                                 );
 661                                 $chardiff .= ' <span class="mw-changeslist-separator"></span> ';
 662                         }
 663
 664                         $lang = $this->getLanguage();
 665                         $comment = $lang->getDirMark() . Linker::revComment( $rev, false, true, false );
 666                         $d = ChangesList::revDateLink( $rev, $user, $lang, $page );
 667
 668                         # When querying for an IP range, we want to always show user and user talk links.
 669                         $userlink = '';
 670                         if ( $this->isQueryableRange( $this->target ) ) {
 671                                 $userlink = ' <span class="mw-changeslist-separator"></span> '
 672                                         . $lang->getDirMark()
 673                                         . Linker::userLink( $rev->getUser(), $rev->getUserText() );
 674                                 $userlink .= ' ' . $this->msg( 'parentheses' )->rawParams(
 675                                         Linker::userTalkLink( $rev->getUser(), $rev->getUserText() ) )->escaped() . ' ';
 676                         }
 677
 678                         $flags = [];
 679                         if ( $rev->getParentId() === 0 ) {
 680                                 $flags[] = ChangesList::flag( 'newpage' );
 681                         }
 682
 683                         if ( $rev->isMinor() ) {
 684                                 $flags[] = ChangesList::flag( 'minor' );
 685                         }
 686
 687                         $del = Linker::getRevDeleteLink( $user, $rev, $page );
 688                         if ( $del !== '' ) {
 689                                 $del .= ' ';
 690                         }
 691
 692                         // While it might be tempting to use a list here
 693                         // this would result in clutter and slows down navigating the content
 694                         // in assistive technology.
 695                         // See https://phabricator.wikimedia.org/T205581#4734812
 696                         $diffHistLinks = Html::rawElement( 'span',
 697                                 [ 'class' => 'mw-changeslist-links' ],
 698                                 // The spans are needed to ensure the dividing '|' elements are not
 699                                 // themselves styled as links.
 700                                 Html::rawElement( 'span', [], $difftext ) .
 701                                 ' ' . // Space needed for separating two words.
 702                                 Html::rawElement( 'span', [], $histlink )
 703                         );
 704
 705                         # Tags, if any.
 706                         list( $tagSummary, $newClasses ) = ChangeTags::formatSummaryRow(
 707                                 $row->ts_tags,
 708                                 'contributions',
 709                                 $this->getContext()
 710                         );
 711                         $classes = array_merge( $classes, $newClasses );
 712
 713                         Hooks::run( 'SpecialContributions::formatRow::flags', [ $this->getContext(), $row, &$flags ] );
 714
 715                         $templateParams = [
 716                                 'del' => $del,
 717                                 'timestamp' => $d,
 718                                 'diffHistLinks' => $diffHistLinks,
 719                                 'charDifference' => $chardiff,
 720                                 'flags' => $flags,
 721                                 'articleLink' => $link,
 722                                 'userlink' => $userlink,
 723                                 'logText' => $comment,
 724                                 'topmarktext' => $topmarktext,
 725                                 'tagSummary' => $tagSummary,
 726                         ];
 727
 728                         # Denote if username is redacted for this edit
 729                         if ( $rev->isDeleted( RevisionRecord::DELETED_USER ) ) {
 730                                 $templateParams['rev-deleted-user-contribs'] =
 731                                         $this->msg( 'rev-deleted-user-contribs' )->escaped();
 732                         }
 733
 734                         $ret = $this->templateParser->processTemplate(
 735                                 'SpecialContributionsLine',
 736                                 $templateParams
 737                         );
 738                 }
 739
 740                 // Let extensions add data
 741                 Hooks::run( 'ContributionsLineEnding', [ $this, &$ret, $row, &$classes, &$attribs ] );
 742                 $attribs = array_filter( $attribs,
 743                         [ Sanitizer::class, 'isReservedDataAttribute' ],
 744                         ARRAY_FILTER_USE_KEY
 745                 );
 746
 747                 // TODO: Handle exceptions in the catch block above.  Do any extensions rely on
 748                 // receiving empty rows?
 749
 750                 if ( $classes === [] && $attribs === [] && $ret === '' ) {
 751                         wfDebug( "Dropping Special:Contribution row that could not be formatted\n" );
 752                         return "<!-- Could not format Special:Contribution row. -->\n";
 753                 }
 754                 $attribs['class'] = $classes;
 755
 756                 // FIXME: The signature of the ContributionsLineEnding hook makes it
 757                 // very awkward to move this LI wrapper into the template.
 758                 return Html::rawElement( 'li', $attribs, $ret ) . "\n";
 759         }
 760
 761         /**
 762          * Overwrite Pager function and return a helpful comment
 763          * @return string
 764          */
 765         function getSqlComment() {
 766                 if ( $this->namespace || $this->deletedOnly ) {
 767                         // potentially slow, see CR r58153
 768                         return 'contributions page filtered for namespace or RevisionDeleted edits';
 769                 } else {
 770                         return 'contributions page unfiltered';
 771                 }
 772         }
 773
 774         protected function preventClickjacking() {
 775                 $this->preventClickjacking = true;
 776         }
 777
 778         /**
 779          * @return bool
 780          */
 781         public function getPreventClickjacking() {
 782                 return $this->preventClickjacking;
 783         }
 784
 785         /**
 786          * Set up date filter options, given request data.
 787          *
 788          * @param array $opts Options array
 789          * @return array Options array with processed start and end date filter options
 790          */
 791         public static function processDateFilter( array $opts ) {
 792                 $start = $opts['start'] ?? '';
 793                 $end = $opts['end'] ?? '';
 794                 $year = $opts['year'] ?? '';
 795                 $month = $opts['month'] ?? '';
 796
 797                 if ( $start !== '' && $end !== '' && $start > $end ) {
 798                         $temp = $start;
 799                         $start = $end;
 800                         $end = $temp;
 801                 }
 802
 803                 // If year/month legacy filtering options are set, convert them to display the new stamp
 804                 if ( $year !== '' || $month !== '' ) {
 805                         // Reuse getDateCond logic, but subtract a day because
 806                         // the endpoints of our date range appear inclusive
 807                         // but the internal end offsets are always exclusive
 808                         $legacyTimestamp = ReverseChronologicalPager::getOffsetDate( $year, $month );
 809                         $legacyDateTime = new DateTime( $legacyTimestamp->getTimestamp( TS_ISO_8601 ) );
 810                         $legacyDateTime = $legacyDateTime->modify( '-1 day' );
 811
 812                         // Clear the new timestamp range options if used and
 813                         // replace with the converted legacy timestamp
 814                         $start = '';
 815                         $end = $legacyDateTime->format( 'Y-m-d' );
 816                 }
 817
 818                 $opts['start'] = $start;
 819                 $opts['end'] = $end;
 820
 821                 return $opts;
 822         }
 823 }