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