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 Set to "newbie" to list contributions from the most recent 1% registered users.
  46          *  $this->target is ignored then. Defaults to "users".
  47          */
  48         private $contribs;
  49
  50         /**
  51          * @var string|int A single namespace number, or an empty string for all namespaces
  52          */
  53         private $namespace = '';
  54
  55         /**
  56          * @var string|false Name of tag to filter, or false to ignore tags
  57          */
  58         private $tagFilter;
  59
  60         /**
  61          * @var bool Set to true to invert the namespace selection
  62          */
  63         private $nsInvert;
  64
  65         /**
  66          * @var bool Set to true to show both the subject and talk namespace, no matter which got
  67          *  selected
  68          */
  69         private $associated;
  70
  71         /**
  72          * @var bool Set to true to show only deleted revisions
  73          */
  74         private $deletedOnly;
  75
  76         /**
  77          * @var bool Set to true to show only latest (a.k.a. current) revisions
  78          */
  79         private $topOnly;
  80
  81         /**
  82          * @var bool Set to true to show only new pages
  83          */
  84         private $newOnly;
  85
  86         /**
  87          * @var bool Set to true to hide edits marked as minor by the user
  88          */
  89         private $hideMinor;
  90
  91         private $preventClickjacking = false;
  92
  93         /** @var IDatabase */
  94         private $mDbSecondary;
  95
  96         /**
  97          * @var array
  98          */
  99         private $mParentLens;
 100
 101         /**
 102          * @var TemplateParser
 103          */
 104         private $templateParser;
 105
 106         public function __construct( IContextSource $context, array $options ) {
 107                 // Set ->target and ->contribs before calling parent::__construct() so
 108                 // parent can call $this->getIndexField() and get the right result. Set
 109                 // the rest too just to keep things simple.
 110                 $this->target = $options['target'] ?? '';
 111                 $this->contribs = $options['contribs'] ?? 'users';
 112                 $this->namespace = $options['namespace'] ?? '';
 113                 $this->tagFilter = $options['tagfilter'] ?? false;
 114                 $this->nsInvert = $options['nsInvert'] ?? false;
 115                 $this->associated = $options['associated'] ?? false;
 116
 117                 $this->deletedOnly = !empty( $options['deletedOnly'] );
 118                 $this->topOnly = !empty( $options['topOnly'] );
 119                 $this->newOnly = !empty( $options['newOnly'] );
 120                 $this->hideMinor = !empty( $options['hideMinor'] );
 121
 122                 parent::__construct( $context );
 123
 124                 $msgs = [
 125                         'diff',
 126                         'hist',
 127                         'pipe-separator',
 128                         'uctop'
 129                 ];
 130
 131                 foreach ( $msgs as $msg ) {
 132                         $this->messages[$msg] = $this->msg( $msg )->escaped();
 133                 }
 134
 135                 // Date filtering: use timestamp if available
 136                 $startTimestamp = '';
 137                 $endTimestamp = '';
 138                 if ( $options['start'] ) {
 139                         $startTimestamp = $options['start'] . ' 00:00:00';
 140                 }
 141                 if ( $options['end'] ) {
 142                         $endTimestamp = $options['end'] . ' 23:59:59';
 143                 }
 144                 $this->getDateRangeCond( $startTimestamp, $endTimestamp );
 145
 146                 // Most of this code will use the 'contributions' group DB, which can map to replica DBs
 147                 // with extra user based indexes or partioning by user. The additional metadata
 148                 // queries should use a regular replica DB since the lookup pattern is not all by user.
 149                 $this->mDbSecondary = wfGetDB( DB_REPLICA ); // any random replica DB
 150                 $this->mDb = wfGetDB( DB_REPLICA, 'contributions' );
 151                 $this->templateParser = new TemplateParser();
 152         }
 153
 154         function getDefaultQuery() {
 155                 $query = parent::getDefaultQuery();
 156                 $query['target'] = $this->target;
 157
 158                 return $query;
 159         }
 160
 161         /**
 162          * Wrap the navigation bar in a p element with identifying class.
 163          * In future we may want to change the `p` tag to a `div` and upstream
 164          * this to the parent class.
 165          *
 166          * @return string HTML
 167          */
 168         function getNavigationBar() {
 169                 return Html::rawElement( 'p', [ 'class' => 'mw-pager-navigation-bar' ],
 170                         parent::getNavigationBar()
 171                 );
 172         }
 173
 174         /**
 175          * This method basically executes the exact same code as the parent class, though with
 176          * a hook added, to allow extensions to add additional queries.
 177          *
 178          * @param string $offset Index offset, inclusive
 179          * @param int $limit Exact query limit
 180          * @param bool $order IndexPager::QUERY_ASCENDING or IndexPager::QUERY_DESCENDING
 181          * @return IResultWrapper
 182          */
 183         function reallyDoQuery( $offset, $limit, $order ) {
 184                 list( $tables, $fields, $conds, $fname, $options, $join_conds ) = $this->buildQueryInfo(
 185                         $offset,
 186                         $limit,
 187                         $order
 188                 );
 189
 190                 /*
 191                  * This hook will allow extensions to add in additional queries, so they can get their data
 192                  * in My Contributions as well. Extensions should append their results to the $data array.
 193                  *
 194                  * Extension queries have to implement the navbar requirement as well. They should
 195                  * - have a column aliased as $pager->getIndexField()
 196                  * - have LIMIT set
 197                  * - have a WHERE-clause that compares the $pager->getIndexField()-equivalent column to the offset
 198                  * - have the ORDER BY specified based upon the details provided by the navbar
 199                  *
 200                  * See includes/Pager.php buildQueryInfo() method on how to build LIMIT, WHERE & ORDER BY
 201                  *
 202                  * &$data: an array of results of all contribs queries
 203                  * $pager: the ContribsPager object hooked into
 204                  * $offset: see phpdoc above
 205                  * $limit: see phpdoc above
 206                  * $descending: see phpdoc above
 207                  */
 208                 $data = [ $this->mDb->select(
 209                         $tables, $fields, $conds, $fname, $options, $join_conds
 210                 ) ];
 211                 Hooks::run(
 212                         'ContribsPager::reallyDoQuery',
 213                         [ &$data, $this, $offset, $limit, $order ]
 214                 );
 215
 216                 $result = [];
 217
 218                 // loop all results and collect them in an array
 219                 foreach ( $data as $query ) {
 220                         foreach ( $query as $i => $row ) {
 221                                 // use index column as key, allowing us to easily sort in PHP
 222                                 $result[$row->{$this->getIndexField()} . "-$i"] = $row;
 223                         }
 224                 }
 225
 226                 // sort results
 227                 if ( $order === self::QUERY_ASCENDING ) {
 228                         ksort( $result );
 229                 } else {
 230                         krsort( $result );
 231                 }
 232
 233                 // enforce limit
 234                 $result = array_slice( $result, 0, $limit );
 235
 236                 // get rid of array keys
 237                 $result = array_values( $result );
 238
 239                 return new FakeResultWrapper( $result );
 240         }
 241
 242         /**
 243          * Return the table targeted for ordering and continuation
 244          *
 245          * See T200259 and T221380.
 246          *
 247          * @warning Keep this in sync with self::getQueryInfo()!
 248          *
 249          * @return string
 250          */
 251         private function getTargetTable() {
 252                 if ( $this->contribs == 'newbie' ) {
 253                         return 'revision';
 254                 }
 255
 256                 $user = User::newFromName( $this->target, false );
 257                 $ipRangeConds = $user->isAnon() ? $this->getIpRangeConds( $this->mDb, $this->target ) : null;
 258                 if ( $ipRangeConds ) {
 259                         return 'ip_changes';
 260                 } else {
 261                         $conds = ActorMigration::newMigration()->getWhere( $this->mDb, 'rev_user', $user );
 262                         if ( isset( $conds['orconds']['actor'] ) ) {
 263                                 // @todo: This will need changing when revision_actor_temp goes away
 264                                 return 'revision_actor_temp';
 265                         }
 266                 }
 267
 268                 return 'revision';
 269         }
 270
 271         function getQueryInfo() {
 272                 $revQuery = Revision::getQueryInfo( [ 'page', 'user' ] );
 273                 $queryInfo = [
 274                         'tables' => $revQuery['tables'],
 275                         'fields' => array_merge( $revQuery['fields'], [ 'page_is_new' ] ),
 276                         'conds' => [],
 277                         'options' => [],
 278                         'join_conds' => $revQuery['joins'],
 279                 ];
 280
 281                 // WARNING: Keep this in sync with getTargetTable()!
 282
 283                 if ( $this->contribs == 'newbie' ) {
 284                         $max = $this->mDb->selectField( 'user', 'max(user_id)', '', __METHOD__ );
 285                         $queryInfo['conds'][] = $revQuery['fields']['rev_user'] . ' >' . (int)( $max - $max / 100 );
 286                         # ignore local groups with the bot right
 287                         # @todo FIXME: Global groups may have 'bot' rights
 288                         $groupsWithBotPermission = User::getGroupsWithPermission( 'bot' );
 289                         if ( count( $groupsWithBotPermission ) ) {
 290                                 $queryInfo['tables'][] = 'user_groups';
 291                                 $queryInfo['conds'][] = 'ug_group IS NULL';
 292                                 $queryInfo['join_conds']['user_groups'] = [
 293                                         'LEFT JOIN', [
 294                                                 'ug_user = ' . $revQuery['fields']['rev_user'],
 295                                                 'ug_group' => $groupsWithBotPermission,
 296                                                 'ug_expiry IS NULL OR ug_expiry >= ' .
 297                                                         $this->mDb->addQuotes( $this->mDb->timestamp() )
 298                                         ]
 299                                 ];
 300                         }
 301                         // (T140537) Disallow looking too far in the past for 'newbies' queries. If the user requested
 302                         // a timestamp offset far in the past such that there are no edits by users with user_ids in
 303                         // the range, we would end up scanning all revisions from that offset until start of time.
 304                         $queryInfo['conds'][] = 'rev_timestamp > ' .
 305                                 $this->mDb->addQuotes( $this->mDb->timestamp( wfTimestamp() - 30 * 24 * 60 * 60 ) );
 306                 } else {
 307                         $user = User::newFromName( $this->target, false );
 308                         $ipRangeConds = $user->isAnon() ? $this->getIpRangeConds( $this->mDb, $this->target ) : null;
 309                         if ( $ipRangeConds ) {
 310                                 $queryInfo['tables'][] = 'ip_changes';
 311                                 $queryInfo['join_conds']['ip_changes'] = [
 312                                         'LEFT JOIN', [ 'ipc_rev_id = rev_id' ]
 313                                 ];
 314                                 $queryInfo['conds'][] = $ipRangeConds;
 315                         } else {
 316                                 // tables and joins are already handled by Revision::getQueryInfo()
 317                                 $conds = ActorMigration::newMigration()->getWhere( $this->mDb, 'rev_user', $user );
 318                                 $queryInfo['conds'][] = $conds['conds'];
 319                                 // Force the appropriate index to avoid bad query plans (T189026)
 320                                 if ( isset( $conds['orconds']['actor'] ) ) {
 321                                         // @todo: This will need changing when revision_actor_temp goes away
 322                                         $queryInfo['options']['USE INDEX']['temp_rev_user'] = 'actor_timestamp';
 323                                 } else {
 324                                         $queryInfo['options']['USE INDEX']['revision'] =
 325                                                 isset( $conds['orconds']['userid'] ) ? 'user_timestamp' : 'usertext_timestamp';
 326                                 }
 327                         }
 328                 }
 329
 330                 if ( $this->deletedOnly ) {
 331                         $queryInfo['conds'][] = 'rev_deleted != 0';
 332                 }
 333
 334                 if ( $this->topOnly ) {
 335                         $queryInfo['conds'][] = 'rev_id = page_latest';
 336                 }
 337
 338                 if ( $this->newOnly ) {
 339                         $queryInfo['conds'][] = 'rev_parent_id = 0';
 340                 }
 341
 342                 if ( $this->hideMinor ) {
 343                         $queryInfo['conds'][] = 'rev_minor_edit = 0';
 344                 }
 345
 346                 $user = $this->getUser();
 347                 $queryInfo['conds'] = array_merge( $queryInfo['conds'], $this->getNamespaceCond() );
 348
 349                 // Paranoia: avoid brute force searches (T19342)
 350                 if ( !$user->isAllowed( 'deletedhistory' ) ) {
 351                         $queryInfo['conds'][] = $this->mDb->bitAnd(
 352                                 'rev_deleted', RevisionRecord::DELETED_USER
 353                                 ) . ' = 0';
 354                 } elseif ( !MediaWikiServices::getInstance()
 355                         ->getPermissionManager()
 356                         ->userHasAnyRight( $user, 'suppressrevision', 'viewsuppressed' )
 357                 ) {
 358                         $queryInfo['conds'][] = $this->mDb->bitAnd(
 359                                 'rev_deleted', RevisionRecord::SUPPRESSED_USER
 360                                 ) . ' != ' . RevisionRecord::SUPPRESSED_USER;
 361                 }
 362
 363                 // $this->getIndexField() must be in the result rows, as reallyDoQuery() tries to access it.
 364                 $indexField = $this->getIndexField();
 365                 if ( $indexField !== 'rev_timestamp' ) {
 366                         $queryInfo['fields'][] = $indexField;
 367                 }
 368
 369                 ChangeTags::modifyDisplayQuery(
 370                         $queryInfo['tables'],
 371                         $queryInfo['fields'],
 372                         $queryInfo['conds'],
 373                         $queryInfo['join_conds'],
 374                         $queryInfo['options'],
 375                         $this->tagFilter
 376                 );
 377
 378                 // Avoid PHP 7.1 warning from passing $this by reference
 379                 $pager = $this;
 380                 Hooks::run( 'ContribsPager::getQueryInfo', [ &$pager, &$queryInfo ] );
 381
 382                 return $queryInfo;
 383         }
 384
 385         function getNamespaceCond() {
 386                 if ( $this->namespace !== '' ) {
 387                         $selectedNS = $this->mDb->addQuotes( $this->namespace );
 388                         $eq_op = $this->nsInvert ? '!=' : '=';
 389                         $bool_op = $this->nsInvert ? 'AND' : 'OR';
 390
 391                         if ( !$this->associated ) {
 392                                 return [ "page_namespace $eq_op $selectedNS" ];
 393                         }
 394
 395                         $associatedNS = $this->mDb->addQuotes(
 396                                 MediaWikiServices::getInstance()->getNamespaceInfo()->getAssociated( $this->namespace )
 397                         );
 398
 399                         return [
 400                                 "page_namespace $eq_op $selectedNS " .
 401                                 $bool_op .
 402                                 " page_namespace $eq_op $associatedNS"
 403                         ];
 404                 }
 405
 406                 return [];
 407         }
 408
 409         /**
 410          * Get SQL conditions for an IP range, if applicable
 411          * @param IDatabase      $db
 412          * @param string         $ip The IP address or CIDR
 413          * @return string|false  SQL for valid IP ranges, false if invalid
 414          */
 415         private function getIpRangeConds( $db, $ip ) {
 416                 // First make sure it is a valid range and they are not outside the CIDR limit
 417                 if ( !$this->isQueryableRange( $ip ) ) {
 418                         return false;
 419                 }
 420
 421                 list( $start, $end ) = IP::parseRange( $ip );
 422
 423                 return 'ipc_hex BETWEEN ' . $db->addQuotes( $start ) . ' AND ' . $db->addQuotes( $end );
 424         }
 425
 426         /**
 427          * Is the given IP a range and within the CIDR limit?
 428          *
 429          * @param string $ipRange
 430          * @return bool True if it is valid
 431          * @since 1.30
 432          */
 433         public function isQueryableRange( $ipRange ) {
 434                 $limits = $this->getConfig()->get( 'RangeContributionsCIDRLimit' );
 435
 436                 $bits = IP::parseCIDR( $ipRange )[1];
 437                 if (
 438                         ( $bits === false ) ||
 439                         ( IP::isIPv4( $ipRange ) && $bits < $limits['IPv4'] ) ||
 440                         ( IP::isIPv6( $ipRange ) && $bits < $limits['IPv6'] )
 441                 ) {
 442                         return false;
 443                 }
 444
 445                 return true;
 446         }
 447
 448         /**
 449          * @return string
 450          */
 451         public function getIndexField() {
 452                 // The returned column is used for sorting and continuation, so we need to
 453                 // make sure to use the right denormalized column depending on which table is
 454                 // being targeted by the query to avoid bad query plans.
 455                 // See T200259, T204669, T220991, and T221380.
 456                 $target = $this->getTargetTable();
 457                 switch ( $target ) {
 458                         case 'revision':
 459                                 return 'rev_timestamp';
 460                         case 'ip_changes':
 461                                 return 'ipc_rev_timestamp';
 462                         case 'revision_actor_temp':
 463                                 return 'revactor_timestamp';
 464                         default:
 465                                 wfWarn(
 466                                         __METHOD__ . ": Unknown value '$target' from " . static::class . '::getTargetTable()', 0
 467                                 );
 468                                 return 'rev_timestamp';
 469                 }
 470         }
 471
 472         /**
 473          * @return false|string
 474          */
 475         public function getTagFilter() {
 476                 return $this->tagFilter;
 477         }
 478
 479         /**
 480          * @return string
 481          */
 482         public function getContribs() {
 483                 return $this->contribs;
 484         }
 485
 486         /**
 487          * @return string
 488          */
 489         public function getTarget() {
 490                 return $this->target;
 491         }
 492
 493         /**
 494          * @return bool
 495          */
 496         public function isNewOnly() {
 497                 return $this->newOnly;
 498         }
 499
 500         /**
 501          * @return int|string
 502          */
 503         public function getNamespace() {
 504                 return $this->namespace;
 505         }
 506
 507         /**
 508          * @return string[]
 509          */
 510         protected function getExtraSortFields() {
 511                 // The returned columns are used for sorting, so we need to make sure
 512                 // to use the right denormalized column depending on which table is
 513                 // being targeted by the query to avoid bad query plans.
 514                 // See T200259, T204669, T220991, and T221380.
 515                 $target = $this->getTargetTable();
 516                 switch ( $target ) {
 517                         case 'revision':
 518                                 return [ 'rev_id' ];
 519                         case 'ip_changes':
 520                                 return [ 'ipc_rev_id' ];
 521                         case 'revision_actor_temp':
 522                                 return [ 'revactor_rev' ];
 523                         default:
 524                                 wfWarn(
 525                                         __METHOD__ . ": Unknown value '$target' from " . static::class . '::getTargetTable()', 0
 526                                 );
 527                                 return [ 'rev_id' ];
 528                 }
 529         }
 530
 531         protected function doBatchLookups() {
 532                 # Do a link batch query
 533                 $this->mResult->seek( 0 );
 534                 $parentRevIds = [];
 535                 $this->mParentLens = [];
 536                 $batch = new LinkBatch();
 537                 $isIpRange = $this->isQueryableRange( $this->target );
 538                 # Give some pointers to make (last) links
 539                 foreach ( $this->mResult as $row ) {
 540                         if ( isset( $row->rev_parent_id ) && $row->rev_parent_id ) {
 541                                 $parentRevIds[] = $row->rev_parent_id;
 542                         }
 543                         if ( isset( $row->rev_id ) ) {
 544                                 $this->mParentLens[$row->rev_id] = $row->rev_len;
 545                                 if ( $this->contribs === 'newbie' ) { // multiple users
 546                                         $batch->add( NS_USER, $row->user_name );
 547                                         $batch->add( NS_USER_TALK, $row->user_name );
 548                                 } elseif ( $isIpRange ) {
 549                                         // If this is an IP range, batch the IP's talk page
 550                                         $batch->add( NS_USER_TALK, $row->rev_user_text );
 551                                 }
 552                                 $batch->add( $row->page_namespace, $row->page_title );
 553                         }
 554                 }
 555                 # Fetch rev_len for revisions not already scanned above
 556                 $this->mParentLens += Revision::getParentLengths(
 557                         $this->mDbSecondary,
 558                         array_diff( $parentRevIds, array_keys( $this->mParentLens ) )
 559                 );
 560                 $batch->execute();
 561                 $this->mResult->seek( 0 );
 562         }
 563
 564         /**
 565          * @return string
 566          */
 567         protected function getStartBody() {
 568                 return "<ul class=\"mw-contributions-list\">\n";
 569         }
 570
 571         /**
 572          * @return string
 573          */
 574         protected function getEndBody() {
 575                 return "</ul>\n";
 576         }
 577
 578         /**
 579          * Check whether the revision associated is valid for formatting. If has no associated revision
 580          * id then null is returned.
 581          *
 582          * @param object $row
 583          * @param Title|null $title
 584          * @return Revision|null
 585          */
 586         public function tryToCreateValidRevision( $row, $title = null ) {
 587                 /*
 588                  * There may be more than just revision rows. To make sure that we'll only be processing
 589                  * revisions here, let's _try_ to build a revision out of our row (without displaying
 590                  * notices though) and then trying to grab data from the built object. If we succeed,
 591                  * we're definitely dealing with revision data and we may proceed, if not, we'll leave it
 592                  * to extensions to subscribe to the hook to parse the row.
 593                  */
 594                 Wikimedia\suppressWarnings();
 595                 try {
 596                         $rev = new Revision( $row, 0, $title );
 597                         $validRevision = (bool)$rev->getId();
 598                 } catch ( Exception $e ) {
 599                         $validRevision = false;
 600                 }
 601                 Wikimedia\restoreWarnings();
 602                 return $validRevision ? $rev : null;
 603         }
 604
 605         /**
 606          * Generates each row in the contributions list.
 607          *
 608          * Contributions which are marked "top" are currently on top of the history.
 609          * For these contributions, a [rollback] link is shown for users with roll-
 610          * back privileges. The rollback link restores the most recent version that
 611          * was not written by the target user.
 612          *
 613          * @todo This would probably look a lot nicer in a table.
 614          * @param object $row
 615          * @return string
 616          */
 617         function formatRow( $row ) {
 618                 $ret = '';
 619                 $classes = [];
 620                 $attribs = [];
 621
 622                 $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
 623
 624                 $page = null;
 625                 // Create a title for the revision if possible
 626                 // Rows from the hook may not include title information
 627                 if ( isset( $row->page_namespace ) && isset( $row->page_title ) ) {
 628                         $page = Title::newFromRow( $row );
 629                 }
 630                 $rev = $this->tryToCreateValidRevision( $row, $page );
 631                 if ( $rev ) {
 632                         $attribs['data-mw-revid'] = $rev->getId();
 633
 634                         $link = $linkRenderer->makeLink(
 635                                 $page,
 636                                 $page->getPrefixedText(),
 637                                 [ 'class' => 'mw-contributions-title' ],
 638                                 $page->isRedirect() ? [ 'redirect' => 'no' ] : []
 639                         );
 640                         # Mark current revisions
 641                         $topmarktext = '';
 642                         $user = $this->getUser();
 643
 644                         if ( $row->rev_id === $row->page_latest ) {
 645                                 $topmarktext .= '<span class="mw-uctop">' . $this->messages['uctop'] . '</span>';
 646                                 $classes[] = 'mw-contributions-current';
 647                                 # Add rollback link
 648                                 if ( !$row->page_is_new && $page->quickUserCan( 'rollback', $user )
 649                                         && $page->quickUserCan( 'edit', $user )
 650                                 ) {
 651                                         $this->preventClickjacking();
 652                                         $topmarktext .= ' ' . Linker::generateRollback( $rev, $this->getContext(),
 653                                                 [ 'noBrackets' ] );
 654                                 }
 655                         }
 656                         # Is there a visible previous revision?
 657                         if ( $rev->userCan( RevisionRecord::DELETED_TEXT, $user ) && $rev->getParentId() !== 0 ) {
 658                                 $difftext = $linkRenderer->makeKnownLink(
 659                                         $page,
 660                                         new HtmlArmor( $this->messages['diff'] ),
 661                                         [ 'class' => 'mw-changeslist-diff' ],
 662                                         [
 663                                                 'diff' => 'prev',
 664                                                 'oldid' => $row->rev_id
 665                                         ]
 666                                 );
 667                         } else {
 668                                 $difftext = $this->messages['diff'];
 669                         }
 670                         $histlink = $linkRenderer->makeKnownLink(
 671                                 $page,
 672                                 new HtmlArmor( $this->messages['hist'] ),
 673                                 [ 'class' => 'mw-changeslist-history' ],
 674                                 [ 'action' => 'history' ]
 675                         );
 676
 677                         if ( $row->rev_parent_id === null ) {
 678                                 // For some reason rev_parent_id isn't populated for this row.
 679                                 // Its rumoured this is true on wikipedia for some revisions (T36922).
 680                                 // Next best thing is to have the total number of bytes.
 681                                 $chardiff = ' <span class="mw-changeslist-separator"></span> ';
 682                                 $chardiff .= Linker::formatRevisionSize( $row->rev_len );
 683                                 $chardiff .= ' <span class="mw-changeslist-separator"></span> ';
 684                         } else {
 685                                 $parentLen = 0;
 686                                 if ( isset( $this->mParentLens[$row->rev_parent_id] ) ) {
 687                                         $parentLen = $this->mParentLens[$row->rev_parent_id];
 688                                 }
 689
 690                                 $chardiff = ' <span class="mw-changeslist-separator"></span> ';
 691                                 $chardiff .= ChangesList::showCharacterDifference(
 692                                         $parentLen,
 693                                         $row->rev_len,
 694                                         $this->getContext()
 695                                 );
 696                                 $chardiff .= ' <span class="mw-changeslist-separator"></span> ';
 697                         }
 698
 699                         $lang = $this->getLanguage();
 700                         $comment = $lang->getDirMark() . Linker::revComment( $rev, false, true, false );
 701                         $d = ChangesList::revDateLink( $rev, $user, $lang, $page );
 702
 703                         # Show user names for /newbies as there may be different users.
 704                         # Note that only unprivileged users have rows with hidden user names excluded.
 705                         # When querying for an IP range, we want to always show user and user talk links.
 706                         $userlink = '';
 707                         if ( ( $this->contribs == 'newbie' && !$rev->isDeleted( RevisionRecord::DELETED_USER ) )
 708                                 || $this->isQueryableRange( $this->target ) ) {
 709                                 $userlink = ' <span class="mw-changeslist-separator"></span> '
 710                                         . $lang->getDirMark()
 711                                         . Linker::userLink( $rev->getUser(), $rev->getUserText() );
 712                                 $userlink .= ' ' . $this->msg( 'parentheses' )->rawParams(
 713                                         Linker::userTalkLink( $rev->getUser(), $rev->getUserText() ) )->escaped() . ' ';
 714                         }
 715
 716                         $flags = [];
 717                         if ( $rev->getParentId() === 0 ) {
 718                                 $flags[] = ChangesList::flag( 'newpage' );
 719                         }
 720
 721                         if ( $rev->isMinor() ) {
 722                                 $flags[] = ChangesList::flag( 'minor' );
 723                         }
 724
 725                         $del = Linker::getRevDeleteLink( $user, $rev, $page );
 726                         if ( $del !== '' ) {
 727                                 $del .= ' ';
 728                         }
 729
 730                         // While it might be tempting to use a list here
 731                         // this would result in clutter and slows down navigating the content
 732                         // in assistive technology.
 733                         // See https://phabricator.wikimedia.org/T205581#4734812
 734                         $diffHistLinks = Html::rawElement( 'span',
 735                                 [ 'class' => 'mw-changeslist-links' ],
 736                                 // The spans are needed to ensure the dividing '|' elements are not
 737                                 // themselves styled as links.
 738                                 Html::rawElement( 'span', [], $difftext ) .
 739                                 ' ' . // Space needed for separating two words.
 740                                 Html::rawElement( 'span', [], $histlink )
 741                         );
 742
 743                         # Tags, if any.
 744                         list( $tagSummary, $newClasses ) = ChangeTags::formatSummaryRow(
 745                                 $row->ts_tags,
 746                                 'contributions',
 747                                 $this->getContext()
 748                         );
 749                         $classes = array_merge( $classes, $newClasses );
 750
 751                         Hooks::run( 'SpecialContributions::formatRow::flags', [ $this->getContext(), $row, &$flags ] );
 752
 753                         $templateParams = [
 754                                 'del' => $del,
 755                                 'timestamp' => $d,
 756                                 'diffHistLinks' => $diffHistLinks,
 757                                 'charDifference' => $chardiff,
 758                                 'flags' => $flags,
 759                                 'articleLink' => $link,
 760                                 'userlink' => $userlink,
 761                                 'logText' => $comment,
 762                                 'topmarktext' => $topmarktext,
 763                                 'tagSummary' => $tagSummary,
 764                         ];
 765
 766                         # Denote if username is redacted for this edit
 767                         if ( $rev->isDeleted( RevisionRecord::DELETED_USER ) ) {
 768                                 $templateParams['rev-deleted-user-contribs'] =
 769                                         $this->msg( 'rev-deleted-user-contribs' )->escaped();
 770                         }
 771
 772                         $ret = $this->templateParser->processTemplate(
 773                                 'SpecialContributionsLine',
 774                                 $templateParams
 775                         );
 776                 }
 777
 778                 // Let extensions add data
 779                 Hooks::run( 'ContributionsLineEnding', [ $this, &$ret, $row, &$classes, &$attribs ] );
 780                 $attribs = array_filter( $attribs,
 781                         [ Sanitizer::class, 'isReservedDataAttribute' ],
 782                         ARRAY_FILTER_USE_KEY
 783                 );
 784
 785                 // TODO: Handle exceptions in the catch block above.  Do any extensions rely on
 786                 // receiving empty rows?
 787
 788                 if ( $classes === [] && $attribs === [] && $ret === '' ) {
 789                         wfDebug( "Dropping Special:Contribution row that could not be formatted\n" );
 790                         return "<!-- Could not format Special:Contribution row. -->\n";
 791                 }
 792                 $attribs['class'] = $classes;
 793
 794                 // FIXME: The signature of the ContributionsLineEnding hook makes it
 795                 // very awkward to move this LI wrapper into the template.
 796                 return Html::rawElement( 'li', $attribs, $ret ) . "\n";
 797         }
 798
 799         /**
 800          * Overwrite Pager function and return a helpful comment
 801          * @return string
 802          */
 803         function getSqlComment() {
 804                 if ( $this->namespace || $this->deletedOnly ) {
 805                         // potentially slow, see CR r58153
 806                         return 'contributions page filtered for namespace or RevisionDeleted edits';
 807                 } else {
 808                         return 'contributions page unfiltered';
 809                 }
 810         }
 811
 812         protected function preventClickjacking() {
 813                 $this->preventClickjacking = true;
 814         }
 815
 816         /**
 817          * @return bool
 818          */
 819         public function getPreventClickjacking() {
 820                 return $this->preventClickjacking;
 821         }
 822
 823         /**
 824          * Set up date filter options, given request data.
 825          *
 826          * @param array $opts Options array
 827          * @return array Options array with processed start and end date filter options
 828          */
 829         public static function processDateFilter( array $opts ) {
 830                 $start = $opts['start'] ?? '';
 831                 $end = $opts['end'] ?? '';
 832                 $year = $opts['year'] ?? '';
 833                 $month = $opts['month'] ?? '';
 834
 835                 if ( $start !== '' && $end !== '' && $start > $end ) {
 836                         $temp = $start;
 837                         $start = $end;
 838                         $end = $temp;
 839                 }
 840
 841                 // If year/month legacy filtering options are set, convert them to display the new stamp
 842                 if ( $year !== '' || $month !== '' ) {
 843                         // Reuse getDateCond logic, but subtract a day because
 844                         // the endpoints of our date range appear inclusive
 845                         // but the internal end offsets are always exclusive
 846                         $legacyTimestamp = ReverseChronologicalPager::getOffsetDate( $year, $month );
 847                         $legacyDateTime = new DateTime( $legacyTimestamp->getTimestamp( TS_ISO_8601 ) );
 848                         $legacyDateTime = $legacyDateTime->modify( '-1 day' );
 849
 850                         // Clear the new timestamp range options if used and
 851                         // replace with the converted legacy timestamp
 852                         $start = '';
 853                         $end = $legacyDateTime->format( 'Y-m-d' );
 854                 }
 855
 856                 $opts['start'] = $start;
 857                 $opts['end'] = $end;
 858
 859                 return $opts;
 860         }
 861 }