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\ResultWrapper;
  28 use Wikimedia\Rdbms\FakeResultWrapper;
  29 use Wikimedia\Rdbms\IDatabase;
  30
  31 class ContribsPager extends ReverseChronologicalPager {
  32
  33         public $mDefaultDirection = IndexPager::DIR_DESCENDING;
  34         public $messages;
  35         public $target;
  36         public $namespace = '';
  37         public $mDb;
  38         public $preventClickjacking = false;
  39
  40         /** @var IDatabase */
  41         public $mDbSecondary;
  42
  43         /**
  44          * @var array
  45          */
  46         protected $mParentLens;
  47
  48         function __construct( IContextSource $context, array $options ) {
  49                 parent::__construct( $context );
  50
  51                 $msgs = [
  52                         'diff',
  53                         'hist',
  54                         'pipe-separator',
  55                         'uctop'
  56                 ];
  57
  58                 foreach ( $msgs as $msg ) {
  59                         $this->messages[$msg] = $this->msg( $msg )->escaped();
  60                 }
  61
  62                 $this->target = isset( $options['target'] ) ? $options['target'] : '';
  63                 $this->contribs = isset( $options['contribs'] ) ? $options['contribs'] : 'users';
  64                 $this->namespace = isset( $options['namespace'] ) ? $options['namespace'] : '';
  65                 $this->tagFilter = isset( $options['tagfilter'] ) ? $options['tagfilter'] : false;
  66                 $this->nsInvert = isset( $options['nsInvert'] ) ? $options['nsInvert'] : false;
  67                 $this->associated = isset( $options['associated'] ) ? $options['associated'] : false;
  68
  69                 $this->deletedOnly = !empty( $options['deletedOnly'] );
  70                 $this->topOnly = !empty( $options['topOnly'] );
  71                 $this->newOnly = !empty( $options['newOnly'] );
  72                 $this->hideMinor = !empty( $options['hideMinor'] );
  73
  74                 $year = isset( $options['year'] ) ? $options['year'] : false;
  75                 $month = isset( $options['month'] ) ? $options['month'] : false;
  76                 $this->getDateCond( $year, $month );
  77
  78                 // Most of this code will use the 'contributions' group DB, which can map to replica DBs
  79                 // with extra user based indexes or partioning by user. The additional metadata
  80                 // queries should use a regular replica DB since the lookup pattern is not all by user.
  81                 $this->mDbSecondary = wfGetDB( DB_REPLICA ); // any random replica DB
  82                 $this->mDb = wfGetDB( DB_REPLICA, 'contributions' );
  83         }
  84
  85         function getDefaultQuery() {
  86                 $query = parent::getDefaultQuery();
  87                 $query['target'] = $this->target;
  88
  89                 return $query;
  90         }
  91
  92         /**
  93          * This method basically executes the exact same code as the parent class, though with
  94          * a hook added, to allow extensions to add additional queries.
  95          *
  96          * @param string $offset Index offset, inclusive
  97          * @param int $limit Exact query limit
  98          * @param bool $descending Query direction, false for ascending, true for descending
  99          * @return ResultWrapper
 100          */
 101         function reallyDoQuery( $offset, $limit, $descending ) {
 102                 list( $tables, $fields, $conds, $fname, $options, $join_conds ) = $this->buildQueryInfo(
 103                         $offset,
 104                         $limit,
 105                         $descending
 106                 );
 107
 108                 /*
 109                  * This hook will allow extensions to add in additional queries, so they can get their data
 110                  * in My Contributions as well. Extensions should append their results to the $data array.
 111                  *
 112                  * Extension queries have to implement the navbar requirement as well. They should
 113                  * - have a column aliased as $pager->getIndexField()
 114                  * - have LIMIT set
 115                  * - have a WHERE-clause that compares the $pager->getIndexField()-equivalent column to the offset
 116                  * - have the ORDER BY specified based upon the details provided by the navbar
 117                  *
 118                  * See includes/Pager.php buildQueryInfo() method on how to build LIMIT, WHERE & ORDER BY
 119                  *
 120                  * &$data: an array of results of all contribs queries
 121                  * $pager: the ContribsPager object hooked into
 122                  * $offset: see phpdoc above
 123                  * $limit: see phpdoc above
 124                  * $descending: see phpdoc above
 125                  */
 126                 $data = [ $this->mDb->select(
 127                         $tables, $fields, $conds, $fname, $options, $join_conds
 128                 ) ];
 129                 Hooks::run(
 130                         'ContribsPager::reallyDoQuery',
 131                         [ &$data, $this, $offset, $limit, $descending ]
 132                 );
 133
 134                 $result = [];
 135
 136                 // loop all results and collect them in an array
 137                 foreach ( $data as $query ) {
 138                         foreach ( $query as $i => $row ) {
 139                                 // use index column as key, allowing us to easily sort in PHP
 140                                 $result[$row->{$this->getIndexField()} . "-$i"] = $row;
 141                         }
 142                 }
 143
 144                 // sort results
 145                 if ( $descending ) {
 146                         ksort( $result );
 147                 } else {
 148                         krsort( $result );
 149                 }
 150
 151                 // enforce limit
 152                 $result = array_slice( $result, 0, $limit );
 153
 154                 // get rid of array keys
 155                 $result = array_values( $result );
 156
 157                 return new FakeResultWrapper( $result );
 158         }
 159
 160         function getQueryInfo() {
 161                 list( $tables, $index, $userCond, $join_cond ) = $this->getUserCond();
 162
 163                 $user = $this->getUser();
 164                 $conds = array_merge( $userCond, $this->getNamespaceCond() );
 165
 166                 // Paranoia: avoid brute force searches (T19342)
 167                 if ( !$user->isAllowed( 'deletedhistory' ) ) {
 168                         $conds[] = $this->mDb->bitAnd( 'rev_deleted', Revision::DELETED_USER ) . ' = 0';
 169                 } elseif ( !$user->isAllowedAny( 'suppressrevision', 'viewsuppressed' ) ) {
 170                         $conds[] = $this->mDb->bitAnd( 'rev_deleted', Revision::SUPPRESSED_USER ) .
 171                                 ' != ' . Revision::SUPPRESSED_USER;
 172                 }
 173
 174                 # Don't include orphaned revisions
 175                 $join_cond['page'] = Revision::pageJoinCond();
 176                 # Get the current user name for accounts
 177                 $join_cond['user'] = Revision::userJoinCond();
 178
 179                 $options = [];
 180                 if ( $index ) {
 181                         $options['USE INDEX'] = [ 'revision' => $index ];
 182                 }
 183
 184                 $queryInfo = [
 185                         'tables' => $tables,
 186                         'fields' => array_merge(
 187                                 Revision::selectFields(),
 188                                 Revision::selectUserFields(),
 189                                 [ 'page_namespace', 'page_title', 'page_is_new',
 190                                         'page_latest', 'page_is_redirect', 'page_len' ]
 191                         ),
 192                         'conds' => $conds,
 193                         'options' => $options,
 194                         'join_conds' => $join_cond
 195                 ];
 196
 197                 ChangeTags::modifyDisplayQuery(
 198                         $queryInfo['tables'],
 199                         $queryInfo['fields'],
 200                         $queryInfo['conds'],
 201                         $queryInfo['join_conds'],
 202                         $queryInfo['options'],
 203                         $this->tagFilter
 204                 );
 205
 206                 // Avoid PHP 7.1 warning from passing $this by reference
 207                 $pager = $this;
 208                 Hooks::run( 'ContribsPager::getQueryInfo', [ &$pager, &$queryInfo ] );
 209
 210                 return $queryInfo;
 211         }
 212
 213         function getUserCond() {
 214                 $condition = [];
 215                 $join_conds = [];
 216                 $tables = [ 'revision', 'page', 'user' ];
 217                 $index = false;
 218                 if ( $this->contribs == 'newbie' ) {
 219                         $max = $this->mDb->selectField( 'user', 'max(user_id)', false, __METHOD__ );
 220                         $condition[] = 'rev_user >' . (int)( $max - $max / 100 );
 221                         # ignore local groups with the bot right
 222                         # @todo FIXME: Global groups may have 'bot' rights
 223                         $groupsWithBotPermission = User::getGroupsWithPermission( 'bot' );
 224                         if ( count( $groupsWithBotPermission ) ) {
 225                                 $tables[] = 'user_groups';
 226                                 $condition[] = 'ug_group IS NULL';
 227                                 $join_conds['user_groups'] = [
 228                                         'LEFT JOIN', [
 229                                                 'ug_user = rev_user',
 230                                                 'ug_group' => $groupsWithBotPermission,
 231                                                 'ug_expiry IS NULL OR ug_expiry >= ' .
 232                                                         $this->mDb->addQuotes( $this->mDb->timestamp() )
 233                                         ]
 234                                 ];
 235                         }
 236                         // (T140537) Disallow looking too far in the past for 'newbies' queries. If the user requested
 237                         // a timestamp offset far in the past such that there are no edits by users with user_ids in
 238                         // the range, we would end up scanning all revisions from that offset until start of time.
 239                         $condition[] = 'rev_timestamp > ' .
 240                                 $this->mDb->addQuotes( $this->mDb->timestamp( wfTimestamp() - 30 * 24 * 60 * 60 ) );
 241                 } else {
 242                         $uid = User::idFromName( $this->target );
 243                         if ( $uid ) {
 244                                 $condition['rev_user'] = $uid;
 245                                 $index = 'user_timestamp';
 246                         } else {
 247                                 $condition['rev_user_text'] = $this->target;
 248                                 $index = 'usertext_timestamp';
 249                         }
 250                 }
 251
 252                 if ( $this->deletedOnly ) {
 253                         $condition[] = 'rev_deleted != 0';
 254                 }
 255
 256                 if ( $this->topOnly ) {
 257                         $condition[] = 'rev_id = page_latest';
 258                 }
 259
 260                 if ( $this->newOnly ) {
 261                         $condition[] = 'rev_parent_id = 0';
 262                 }
 263
 264                 if ( $this->hideMinor ) {
 265                         $condition[] = 'rev_minor_edit = 0';
 266                 }
 267
 268                 return [ $tables, $index, $condition, $join_conds ];
 269         }
 270
 271         function getNamespaceCond() {
 272                 if ( $this->namespace !== '' ) {
 273                         $selectedNS = $this->mDb->addQuotes( $this->namespace );
 274                         $eq_op = $this->nsInvert ? '!=' : '=';
 275                         $bool_op = $this->nsInvert ? 'AND' : 'OR';
 276
 277                         if ( !$this->associated ) {
 278                                 return [ "page_namespace $eq_op $selectedNS" ];
 279                         }
 280
 281                         $associatedNS = $this->mDb->addQuotes(
 282                                 MWNamespace::getAssociated( $this->namespace )
 283                         );
 284
 285                         return [
 286                                 "page_namespace $eq_op $selectedNS " .
 287                                 $bool_op .
 288                                 " page_namespace $eq_op $associatedNS"
 289                         ];
 290                 }
 291
 292                 return [];
 293         }
 294
 295         function getIndexField() {
 296                 return 'rev_timestamp';
 297         }
 298
 299         function doBatchLookups() {
 300                 # Do a link batch query
 301                 $this->mResult->seek( 0 );
 302                 $parentRevIds = [];
 303                 $this->mParentLens = [];
 304                 $batch = new LinkBatch();
 305                 # Give some pointers to make (last) links
 306                 foreach ( $this->mResult as $row ) {
 307                         if ( isset( $row->rev_parent_id ) && $row->rev_parent_id ) {
 308                                 $parentRevIds[] = $row->rev_parent_id;
 309                         }
 310                         if ( isset( $row->rev_id ) ) {
 311                                 $this->mParentLens[$row->rev_id] = $row->rev_len;
 312                                 if ( $this->contribs === 'newbie' ) { // multiple users
 313                                         $batch->add( NS_USER, $row->user_name );
 314                                         $batch->add( NS_USER_TALK, $row->user_name );
 315                                 }
 316                                 $batch->add( $row->page_namespace, $row->page_title );
 317                         }
 318                 }
 319                 # Fetch rev_len for revisions not already scanned above
 320                 $this->mParentLens += Revision::getParentLengths(
 321                         $this->mDbSecondary,
 322                         array_diff( $parentRevIds, array_keys( $this->mParentLens ) )
 323                 );
 324                 $batch->execute();
 325                 $this->mResult->seek( 0 );
 326         }
 327
 328         /**
 329          * @return string
 330          */
 331         function getStartBody() {
 332                 return "<ul class=\"mw-contributions-list\">\n";
 333         }
 334
 335         /**
 336          * @return string
 337          */
 338         function getEndBody() {
 339                 return "</ul>\n";
 340         }
 341
 342         /**
 343          * Generates each row in the contributions list.
 344          *
 345          * Contributions which are marked "top" are currently on top of the history.
 346          * For these contributions, a [rollback] link is shown for users with roll-
 347          * back privileges. The rollback link restores the most recent version that
 348          * was not written by the target user.
 349          *
 350          * @todo This would probably look a lot nicer in a table.
 351          * @param object $row
 352          * @return string
 353          */
 354         function formatRow( $row ) {
 355
 356                 $ret = '';
 357                 $classes = [];
 358
 359                 $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
 360
 361                 /*
 362                  * There may be more than just revision rows. To make sure that we'll only be processing
 363                  * revisions here, let's _try_ to build a revision out of our row (without displaying
 364                  * notices though) and then trying to grab data from the built object. If we succeed,
 365                  * we're definitely dealing with revision data and we may proceed, if not, we'll leave it
 366                  * to extensions to subscribe to the hook to parse the row.
 367                  */
 368                 MediaWiki\suppressWarnings();
 369                 try {
 370                         $rev = new Revision( $row );
 371                         $validRevision = (bool)$rev->getId();
 372                 } catch ( Exception $e ) {
 373                         $validRevision = false;
 374                 }
 375                 MediaWiki\restoreWarnings();
 376
 377                 if ( $validRevision ) {
 378                         $classes = [];
 379
 380                         $page = Title::newFromRow( $row );
 381                         $link = $linkRenderer->makeLink(
 382                                 $page,
 383                                 $page->getPrefixedText(),
 384                                 [ 'class' => 'mw-contributions-title' ],
 385                                 $page->isRedirect() ? [ 'redirect' => 'no' ] : []
 386                         );
 387                         # Mark current revisions
 388                         $topmarktext = '';
 389                         $user = $this->getUser();
 390                         if ( $row->rev_id === $row->page_latest ) {
 391                                 $topmarktext .= '<span class="mw-uctop">' . $this->messages['uctop'] . '</span>';
 392                                 $classes[] = 'mw-contributions-current';
 393                                 # Add rollback link
 394                                 if ( !$row->page_is_new && $page->quickUserCan( 'rollback', $user )
 395                                         && $page->quickUserCan( 'edit', $user )
 396                                 ) {
 397                                         $this->preventClickjacking();
 398                                         $topmarktext .= ' ' . Linker::generateRollback( $rev, $this->getContext() );
 399                                 }
 400                         }
 401                         # Is there a visible previous revision?
 402                         if ( $rev->userCan( Revision::DELETED_TEXT, $user ) && $rev->getParentId() !== 0 ) {
 403                                 $difftext = $linkRenderer->makeKnownLink(
 404                                         $page,
 405                                         new HtmlArmor( $this->messages['diff'] ),
 406                                         [ 'class' => 'mw-changeslist-diff' ],
 407                                         [
 408                                                 'diff' => 'prev',
 409                                                 'oldid' => $row->rev_id
 410                                         ]
 411                                 );
 412                         } else {
 413                                 $difftext = $this->messages['diff'];
 414                         }
 415                         $histlink = $linkRenderer->makeKnownLink(
 416                                 $page,
 417                                 new HtmlArmor( $this->messages['hist'] ),
 418                                 [ 'class' => 'mw-changeslist-history' ],
 419                                 [ 'action' => 'history' ]
 420                         );
 421
 422                         if ( $row->rev_parent_id === null ) {
 423                                 // For some reason rev_parent_id isn't populated for this row.
 424                                 // Its rumoured this is true on wikipedia for some revisions (T36922).
 425                                 // Next best thing is to have the total number of bytes.
 426                                 $chardiff = ' <span class="mw-changeslist-separator">. .</span> ';
 427                                 $chardiff .= Linker::formatRevisionSize( $row->rev_len );
 428                                 $chardiff .= ' <span class="mw-changeslist-separator">. .</span> ';
 429                         } else {
 430                                 $parentLen = 0;
 431                                 if ( isset( $this->mParentLens[$row->rev_parent_id] ) ) {
 432                                         $parentLen = $this->mParentLens[$row->rev_parent_id];
 433                                 }
 434
 435                                 $chardiff = ' <span class="mw-changeslist-separator">. .</span> ';
 436                                 $chardiff .= ChangesList::showCharacterDifference(
 437                                         $parentLen,
 438                                         $row->rev_len,
 439                                         $this->getContext()
 440                                 );
 441                                 $chardiff .= ' <span class="mw-changeslist-separator">. .</span> ';
 442                         }
 443
 444                         $lang = $this->getLanguage();
 445                         $comment = $lang->getDirMark() . Linker::revComment( $rev, false, true );
 446                         $date = $lang->userTimeAndDate( $row->rev_timestamp, $user );
 447                         if ( $rev->userCan( Revision::DELETED_TEXT, $user ) ) {
 448                                 $d = $linkRenderer->makeKnownLink(
 449                                         $page,
 450                                         $date,
 451                                         [ 'class' => 'mw-changeslist-date' ],
 452                                         [ 'oldid' => intval( $row->rev_id ) ]
 453                                 );
 454                         } else {
 455                                 $d = htmlspecialchars( $date );
 456                         }
 457                         if ( $rev->isDeleted( Revision::DELETED_TEXT ) ) {
 458                                 $d = '<span class="history-deleted">' . $d . '</span>';
 459                         }
 460
 461                         # Show user names for /newbies as there may be different users.
 462                         # Note that we already excluded rows with hidden user names.
 463                         if ( $this->contribs == 'newbie' ) {
 464                                 $userlink = ' . . ' . $lang->getDirMark()
 465                                         . Linker::userLink( $rev->getUser(), $rev->getUserText() );
 466                                 $userlink .= ' ' . $this->msg( 'parentheses' )->rawParams(
 467                                                 Linker::userTalkLink( $rev->getUser(), $rev->getUserText() ) )->escaped() . ' ';
 468                         } else {
 469                                 $userlink = '';
 470                         }
 471
 472                         $flags = [];
 473                         if ( $rev->getParentId() === 0 ) {
 474                                 $flags[] = ChangesList::flag( 'newpage' );
 475                         }
 476
 477                         if ( $rev->isMinor() ) {
 478                                 $flags[] = ChangesList::flag( 'minor' );
 479                         }
 480
 481                         $del = Linker::getRevDeleteLink( $user, $rev, $page );
 482                         if ( $del !== '' ) {
 483                                 $del .= ' ';
 484                         }
 485
 486                         $diffHistLinks = $this->msg( 'parentheses' )
 487                                 ->rawParams( $difftext . $this->messages['pipe-separator'] . $histlink )
 488                                 ->escaped();
 489
 490                         # Tags, if any.
 491                         list( $tagSummary, $newClasses ) = ChangeTags::formatSummaryRow(
 492                                 $row->ts_tags,
 493                                 'contributions',
 494                                 $this->getContext()
 495                         );
 496                         $classes = array_merge( $classes, $newClasses );
 497
 498                         Hooks::run( 'SpecialContributions::formatRow::flags', [ $this->getContext(), $row, &$flags ] );
 499
 500                         $templateParams = [
 501                                 'del' => $del,
 502                                 'timestamp' => $d,
 503                                 'diffHistLinks' => $diffHistLinks,
 504                                 'charDifference' => $chardiff,
 505                                 'flags' => $flags,
 506                                 'articleLink' => $link,
 507                                 'userlink' => $userlink,
 508                                 'logText' => $comment,
 509                                 'topmarktext' => $topmarktext,
 510                                 'tagSummary' => $tagSummary,
 511                         ];
 512
 513                         # Denote if username is redacted for this edit
 514                         if ( $rev->isDeleted( Revision::DELETED_USER ) ) {
 515                                 $templateParams['rev-deleted-user-contribs'] =
 516                                         $this->msg( 'rev-deleted-user-contribs' )->escaped();
 517                         }
 518
 519                         $templateParser = new TemplateParser();
 520                         $ret = $templateParser->processTemplate(
 521                                 'SpecialContributionsLine',
 522                                 $templateParams
 523                         );
 524                 }
 525
 526                 // Let extensions add data
 527                 Hooks::run( 'ContributionsLineEnding', [ $this, &$ret, $row, &$classes ] );
 528
 529                 // TODO: Handle exceptions in the catch block above.  Do any extensions rely on
 530                 // receiving empty rows?
 531
 532                 if ( $classes === [] && $ret === '' ) {
 533                         wfDebug( "Dropping Special:Contribution row that could not be formatted\n" );
 534                         return "<!-- Could not format Special:Contribution row. -->\n";
 535                 }
 536
 537                 // FIXME: The signature of the ContributionsLineEnding hook makes it
 538                 // very awkward to move this LI wrapper into the template.
 539                 return Html::rawElement( 'li', [ 'class' => $classes ], $ret ) . "\n";
 540         }
 541
 542         /**
 543          * Overwrite Pager function and return a helpful comment
 544          * @return string
 545          */
 546         function getSqlComment() {
 547                 if ( $this->namespace || $this->deletedOnly ) {
 548                         // potentially slow, see CR r58153
 549                         return 'contributions page filtered for namespace or RevisionDeleted edits';
 550                 } else {
 551                         return 'contributions page unfiltered';
 552                 }
 553         }
 554
 555         protected function preventClickjacking() {
 556                 $this->preventClickjacking = true;
 557         }
 558
 559         /**
 560          * @return bool
 561          */
 562         public function getPreventClickjacking() {
 563                 return $this->preventClickjacking;
 564         }
 565 }