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
  28 class ContribsPager extends ReverseChronologicalPager {
  29
  30         public $mDefaultDirection = IndexPager::DIR_DESCENDING;
  31         public $messages;
  32         public $target;
  33         public $namespace = '';
  34         public $mDb;
  35         public $preventClickjacking = false;
  36
  37         /** @var IDatabase */
  38         public $mDbSecondary;
  39
  40         /**
  41          * @var array
  42          */
  43         protected $mParentLens;
  44
  45         function __construct( IContextSource $context, array $options ) {
  46                 parent::__construct( $context );
  47
  48                 $msgs = [
  49                         'diff',
  50                         'hist',
  51                         'pipe-separator',
  52                         'uctop'
  53                 ];
  54
  55                 foreach ( $msgs as $msg ) {
  56                         $this->messages[$msg] = $this->msg( $msg )->escaped();
  57                 }
  58
  59                 $this->target = isset( $options['target'] ) ? $options['target'] : '';
  60                 $this->contribs = isset( $options['contribs'] ) ? $options['contribs'] : 'users';
  61                 $this->namespace = isset( $options['namespace'] ) ? $options['namespace'] : '';
  62                 $this->tagFilter = isset( $options['tagfilter'] ) ? $options['tagfilter'] : false;
  63                 $this->nsInvert = isset( $options['nsInvert'] ) ? $options['nsInvert'] : false;
  64                 $this->associated = isset( $options['associated'] ) ? $options['associated'] : false;
  65
  66                 $this->deletedOnly = !empty( $options['deletedOnly'] );
  67                 $this->topOnly = !empty( $options['topOnly'] );
  68                 $this->newOnly = !empty( $options['newOnly'] );
  69                 $this->hideMinor = !empty( $options['hideMinor'] );
  70
  71                 $year = isset( $options['year'] ) ? $options['year'] : false;
  72                 $month = isset( $options['month'] ) ? $options['month'] : false;
  73                 $this->getDateCond( $year, $month );
  74
  75                 // Most of this code will use the 'contributions' group DB, which can map to replica DBs
  76                 // with extra user based indexes or partioning by user. The additional metadata
  77                 // queries should use a regular replica DB since the lookup pattern is not all by user.
  78                 $this->mDbSecondary = wfGetDB( DB_REPLICA ); // any random replica DB
  79                 $this->mDb = wfGetDB( DB_REPLICA, 'contributions' );
  80         }
  81
  82         function getDefaultQuery() {
  83                 $query = parent::getDefaultQuery();
  84                 $query['target'] = $this->target;
  85
  86                 return $query;
  87         }
  88
  89         /**
  90          * This method basically executes the exact same code as the parent class, though with
  91          * a hook added, to allow extensions to add additional queries.
  92          *
  93          * @param string $offset Index offset, inclusive
  94          * @param int $limit Exact query limit
  95          * @param bool $descending Query direction, false for ascending, true for descending
  96          * @return ResultWrapper
  97          */
  98         function reallyDoQuery( $offset, $limit, $descending ) {
  99                 list( $tables, $fields, $conds, $fname, $options, $join_conds ) = $this->buildQueryInfo(
 100                         $offset,
 101                         $limit,
 102                         $descending
 103                 );
 104
 105                 /*
 106                  * This hook will allow extensions to add in additional queries, so they can get their data
 107                  * in My Contributions as well. Extensions should append their results to the $data array.
 108                  *
 109                  * Extension queries have to implement the navbar requirement as well. They should
 110                  * - have a column aliased as $pager->getIndexField()
 111                  * - have LIMIT set
 112                  * - have a WHERE-clause that compares the $pager->getIndexField()-equivalent column to the offset
 113                  * - have the ORDER BY specified based upon the details provided by the navbar
 114                  *
 115                  * See includes/Pager.php buildQueryInfo() method on how to build LIMIT, WHERE & ORDER BY
 116                  *
 117                  * &$data: an array of results of all contribs queries
 118                  * $pager: the ContribsPager object hooked into
 119                  * $offset: see phpdoc above
 120                  * $limit: see phpdoc above
 121                  * $descending: see phpdoc above
 122                  */
 123                 $data = [ $this->mDb->select(
 124                         $tables, $fields, $conds, $fname, $options, $join_conds
 125                 ) ];
 126                 Hooks::run(
 127                         'ContribsPager::reallyDoQuery',
 128                         [ &$data, $this, $offset, $limit, $descending ]
 129                 );
 130
 131                 $result = [];
 132
 133                 // loop all results and collect them in an array
 134                 foreach ( $data as $query ) {
 135                         foreach ( $query as $i => $row ) {
 136                                 // use index column as key, allowing us to easily sort in PHP
 137                                 $result[$row->{$this->getIndexField()} . "-$i"] = $row;
 138                         }
 139                 }
 140
 141                 // sort results
 142                 if ( $descending ) {
 143                         ksort( $result );
 144                 } else {
 145                         krsort( $result );
 146                 }
 147
 148                 // enforce limit
 149                 $result = array_slice( $result, 0, $limit );
 150
 151                 // get rid of array keys
 152                 $result = array_values( $result );
 153
 154                 return new FakeResultWrapper( $result );
 155         }
 156
 157         function getQueryInfo() {
 158                 list( $tables, $index, $userCond, $join_cond ) = $this->getUserCond();
 159
 160                 $user = $this->getUser();
 161                 $conds = array_merge( $userCond, $this->getNamespaceCond() );
 162
 163                 // Paranoia: avoid brute force searches (bug 17342)
 164                 if ( !$user->isAllowed( 'deletedhistory' ) ) {
 165                         $conds[] = $this->mDb->bitAnd( 'rev_deleted', Revision::DELETED_USER ) . ' = 0';
 166                 } elseif ( !$user->isAllowedAny( 'suppressrevision', 'viewsuppressed' ) ) {
 167                         $conds[] = $this->mDb->bitAnd( 'rev_deleted', Revision::SUPPRESSED_USER ) .
 168                                 ' != ' . Revision::SUPPRESSED_USER;
 169                 }
 170
 171                 # Don't include orphaned revisions
 172                 $join_cond['page'] = Revision::pageJoinCond();
 173                 # Get the current user name for accounts
 174                 $join_cond['user'] = Revision::userJoinCond();
 175
 176                 $options = [];
 177                 if ( $index ) {
 178                         $options['USE INDEX'] = [ 'revision' => $index ];
 179                 }
 180
 181                 $queryInfo = [
 182                         'tables' => $tables,
 183                         'fields' => array_merge(
 184                                 Revision::selectFields(),
 185                                 Revision::selectUserFields(),
 186                                 [ 'page_namespace', 'page_title', 'page_is_new',
 187                                         'page_latest', 'page_is_redirect', 'page_len' ]
 188                         ),
 189                         'conds' => $conds,
 190                         'options' => $options,
 191                         'join_conds' => $join_cond
 192                 ];
 193
 194                 ChangeTags::modifyDisplayQuery(
 195                         $queryInfo['tables'],
 196                         $queryInfo['fields'],
 197                         $queryInfo['conds'],
 198                         $queryInfo['join_conds'],
 199                         $queryInfo['options'],
 200                         $this->tagFilter
 201                 );
 202
 203                 Hooks::run( 'ContribsPager::getQueryInfo', [ &$this, &$queryInfo ] );
 204
 205                 return $queryInfo;
 206         }
 207
 208         function getUserCond() {
 209                 $condition = [];
 210                 $join_conds = [];
 211                 $tables = [ 'revision', 'page', 'user' ];
 212                 $index = false;
 213                 if ( $this->contribs == 'newbie' ) {
 214                         $max = $this->mDb->selectField( 'user', 'max(user_id)', false, __METHOD__ );
 215                         $condition[] = 'rev_user >' . (int)( $max - $max / 100 );
 216                         # ignore local groups with the bot right
 217                         # @todo FIXME: Global groups may have 'bot' rights
 218                         $groupsWithBotPermission = User::getGroupsWithPermission( 'bot' );
 219                         if ( count( $groupsWithBotPermission ) ) {
 220                                 $tables[] = 'user_groups';
 221                                 $condition[] = 'ug_group IS NULL';
 222                                 $join_conds['user_groups'] = [
 223                                         'LEFT JOIN', [
 224                                                 'ug_user = rev_user',
 225                                                 'ug_group' => $groupsWithBotPermission,
 226                                                 'ug_expiry IS NULL OR ug_expiry >= ' . $this->mDb->addQuotes( $this->mDb->timestamp() )
 227                                         ]
 228                                 ];
 229                         }
 230                         // (T140537) Disallow looking too far in the past for 'newbies' queries. If the user requested
 231                         // a timestamp offset far in the past such that there are no edits by users with user_ids in
 232                         // the range, we would end up scanning all revisions from that offset until start of time.
 233                         $condition[] = 'rev_timestamp > ' .
 234                                 $this->mDb->addQuotes( $this->mDb->timestamp( wfTimestamp() - 30 * 24 * 60 * 60 ) );
 235                 } else {
 236                         $uid = User::idFromName( $this->target );
 237                         if ( $uid ) {
 238                                 $condition['rev_user'] = $uid;
 239                                 $index = 'user_timestamp';
 240                         } else {
 241                                 $condition['rev_user_text'] = $this->target;
 242                                 $index = 'usertext_timestamp';
 243                         }
 244                 }
 245
 246                 if ( $this->deletedOnly ) {
 247                         $condition[] = 'rev_deleted != 0';
 248                 }
 249
 250                 if ( $this->topOnly ) {
 251                         $condition[] = 'rev_id = page_latest';
 252                 }
 253
 254                 if ( $this->newOnly ) {
 255                         $condition[] = 'rev_parent_id = 0';
 256                 }
 257
 258                 if ( $this->hideMinor ) {
 259                         $condition[] = 'rev_minor_edit = 0';
 260                 }
 261
 262                 return [ $tables, $index, $condition, $join_conds ];
 263         }
 264
 265         function getNamespaceCond() {
 266                 if ( $this->namespace !== '' ) {
 267                         $selectedNS = $this->mDb->addQuotes( $this->namespace );
 268                         $eq_op = $this->nsInvert ? '!=' : '=';
 269                         $bool_op = $this->nsInvert ? 'AND' : 'OR';
 270
 271                         if ( !$this->associated ) {
 272                                 return [ "page_namespace $eq_op $selectedNS" ];
 273                         }
 274
 275                         $associatedNS = $this->mDb->addQuotes(
 276                                 MWNamespace::getAssociated( $this->namespace )
 277                         );
 278
 279                         return [
 280                                 "page_namespace $eq_op $selectedNS " .
 281                                 $bool_op .
 282                                 " page_namespace $eq_op $associatedNS"
 283                         ];
 284                 }
 285
 286                 return [];
 287         }
 288
 289         function getIndexField() {
 290                 return 'rev_timestamp';
 291         }
 292
 293         function doBatchLookups() {
 294                 # Do a link batch query
 295                 $this->mResult->seek( 0 );
 296                 $parentRevIds = [];
 297                 $this->mParentLens = [];
 298                 $batch = new LinkBatch();
 299                 # Give some pointers to make (last) links
 300                 foreach ( $this->mResult as $row ) {
 301                         if ( isset( $row->rev_parent_id ) && $row->rev_parent_id ) {
 302                                 $parentRevIds[] = $row->rev_parent_id;
 303                         }
 304                         if ( isset( $row->rev_id ) ) {
 305                                 $this->mParentLens[$row->rev_id] = $row->rev_len;
 306                                 if ( $this->contribs === 'newbie' ) { // multiple users
 307                                         $batch->add( NS_USER, $row->user_name );
 308                                         $batch->add( NS_USER_TALK, $row->user_name );
 309                                 }
 310                                 $batch->add( $row->page_namespace, $row->page_title );
 311                         }
 312                 }
 313                 # Fetch rev_len for revisions not already scanned above
 314                 $this->mParentLens += Revision::getParentLengths(
 315                         $this->mDbSecondary,
 316                         array_diff( $parentRevIds, array_keys( $this->mParentLens ) )
 317                 );
 318                 $batch->execute();
 319                 $this->mResult->seek( 0 );
 320         }
 321
 322         /**
 323          * @return string
 324          */
 325         function getStartBody() {
 326                 return "<ul class=\"mw-contributions-list\">\n";
 327         }
 328
 329         /**
 330          * @return string
 331          */
 332         function getEndBody() {
 333                 return "</ul>\n";
 334         }
 335
 336         /**
 337          * Generates each row in the contributions list.
 338          *
 339          * Contributions which are marked "top" are currently on top of the history.
 340          * For these contributions, a [rollback] link is shown for users with roll-
 341          * back privileges. The rollback link restores the most recent version that
 342          * was not written by the target user.
 343          *
 344          * @todo This would probably look a lot nicer in a table.
 345          * @param object $row
 346          * @return string
 347          */
 348         function formatRow( $row ) {
 349
 350                 $ret = '';
 351                 $classes = [];
 352
 353                 $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
 354
 355                 /*
 356                  * There may be more than just revision rows. To make sure that we'll only be processing
 357                  * revisions here, let's _try_ to build a revision out of our row (without displaying
 358                  * notices though) and then trying to grab data from the built object. If we succeed,
 359                  * we're definitely dealing with revision data and we may proceed, if not, we'll leave it
 360                  * to extensions to subscribe to the hook to parse the row.
 361                  */
 362                 MediaWiki\suppressWarnings();
 363                 try {
 364                         $rev = new Revision( $row );
 365                         $validRevision = (bool)$rev->getId();
 366                 } catch ( Exception $e ) {
 367                         $validRevision = false;
 368                 }
 369                 MediaWiki\restoreWarnings();
 370
 371                 if ( $validRevision ) {
 372                         $classes = [];
 373
 374                         $page = Title::newFromRow( $row );
 375                         $link = $linkRenderer->makeLink(
 376                                 $page,
 377                                 $page->getPrefixedText(),
 378                                 [ 'class' => 'mw-contributions-title' ],
 379                                 $page->isRedirect() ? [ 'redirect' => 'no' ] : []
 380                         );
 381                         # Mark current revisions
 382                         $topmarktext = '';
 383                         $user = $this->getUser();
 384                         if ( $row->rev_id === $row->page_latest ) {
 385                                 $topmarktext .= '<span class="mw-uctop">' . $this->messages['uctop'] . '</span>';
 386                                 $classes[] = 'mw-contributions-current';
 387                                 # Add rollback link
 388                                 if ( !$row->page_is_new && $page->quickUserCan( 'rollback', $user )
 389                                         && $page->quickUserCan( 'edit', $user )
 390                                 ) {
 391                                         $this->preventClickjacking();
 392                                         $topmarktext .= ' ' . Linker::generateRollback( $rev, $this->getContext() );
 393                                 }
 394                         }
 395                         # Is there a visible previous revision?
 396                         if ( $rev->userCan( Revision::DELETED_TEXT, $user ) && $rev->getParentId() !== 0 ) {
 397                                 $difftext = $linkRenderer->makeKnownLink(
 398                                         $page,
 399                                         new HtmlArmor( $this->messages['diff'] ),
 400                                         [],
 401                                         [
 402                                                 'diff' => 'prev',
 403                                                 'oldid' => $row->rev_id
 404                                         ]
 405                                 );
 406                         } else {
 407                                 $difftext = $this->messages['diff'];
 408                         }
 409                         $histlink = $linkRenderer->makeKnownLink(
 410                                 $page,
 411                                 new HtmlArmor( $this->messages['hist'] ),
 412                                 [],
 413                                 [ 'action' => 'history' ]
 414                         );
 415
 416                         if ( $row->rev_parent_id === null ) {
 417                                 // For some reason rev_parent_id isn't populated for this row.
 418                                 // Its rumoured this is true on wikipedia for some revisions (bug 34922).
 419                                 // Next best thing is to have the total number of bytes.
 420                                 $chardiff = ' <span class="mw-changeslist-separator">. .</span> ';
 421                                 $chardiff .= Linker::formatRevisionSize( $row->rev_len );
 422                                 $chardiff .= ' <span class="mw-changeslist-separator">. .</span> ';
 423                         } else {
 424                                 $parentLen = 0;
 425                                 if ( isset( $this->mParentLens[$row->rev_parent_id] ) ) {
 426                                         $parentLen = $this->mParentLens[$row->rev_parent_id];
 427                                 }
 428
 429                                 $chardiff = ' <span class="mw-changeslist-separator">. .</span> ';
 430                                 $chardiff .= ChangesList::showCharacterDifference(
 431                                         $parentLen,
 432                                         $row->rev_len,
 433                                         $this->getContext()
 434                                 );
 435                                 $chardiff .= ' <span class="mw-changeslist-separator">. .</span> ';
 436                         }
 437
 438                         $lang = $this->getLanguage();
 439                         $comment = $lang->getDirMark() . Linker::revComment( $rev, false, true );
 440                         $date = $lang->userTimeAndDate( $row->rev_timestamp, $user );
 441                         if ( $rev->userCan( Revision::DELETED_TEXT, $user ) ) {
 442                                 $d = $linkRenderer->makeKnownLink(
 443                                         $page,
 444                                         $date,
 445                                         [ 'class' => 'mw-changeslist-date' ],
 446                                         [ 'oldid' => intval( $row->rev_id ) ]
 447                                 );
 448                         } else {
 449                                 $d = htmlspecialchars( $date );
 450                         }
 451                         if ( $rev->isDeleted( Revision::DELETED_TEXT ) ) {
 452                                 $d = '<span class="history-deleted">' . $d . '</span>';
 453                         }
 454
 455                         # Show user names for /newbies as there may be different users.
 456                         # Note that we already excluded rows with hidden user names.
 457                         if ( $this->contribs == 'newbie' ) {
 458                                 $userlink = ' . . ' . $lang->getDirMark()
 459                                         . Linker::userLink( $rev->getUser(), $rev->getUserText() );
 460                                 $userlink .= ' ' . $this->msg( 'parentheses' )->rawParams(
 461                                                 Linker::userTalkLink( $rev->getUser(), $rev->getUserText() ) )->escaped() . ' ';
 462                         } else {
 463                                 $userlink = '';
 464                         }
 465
 466                         $flags = [];
 467                         if ( $rev->getParentId() === 0 ) {
 468                                 $flags[] = ChangesList::flag( 'newpage' );
 469                         }
 470
 471                         if ( $rev->isMinor() ) {
 472                                 $flags[] = ChangesList::flag( 'minor' );
 473                         }
 474
 475                         $del = Linker::getRevDeleteLink( $user, $rev, $page );
 476                         if ( $del !== '' ) {
 477                                 $del .= ' ';
 478                         }
 479
 480                         $diffHistLinks = $this->msg( 'parentheses' )
 481                                 ->rawParams( $difftext . $this->messages['pipe-separator'] . $histlink )
 482                                 ->escaped();
 483
 484                         # Tags, if any.
 485                         list( $tagSummary, $newClasses ) = ChangeTags::formatSummaryRow(
 486                                 $row->ts_tags,
 487                                 'contributions',
 488                                 $this->getContext()
 489                         );
 490                         $classes = array_merge( $classes, $newClasses );
 491
 492                         Hooks::run( 'SpecialContributions::formatRow::flags', [ $this->getContext(), $row, &$flags ] );
 493
 494                         $templateParams = [
 495                                 'del' => $del,
 496                                 'timestamp' => $d,
 497                                 'diffHistLinks' => $diffHistLinks,
 498                                 'charDifference' => $chardiff,
 499                                 'flags' => $flags,
 500                                 'articleLink' => $link,
 501                                 'userlink' => $userlink,
 502                                 'logText' => $comment,
 503                                 'topmarktext' => $topmarktext,
 504                                 'tagSummary' => $tagSummary,
 505                         ];
 506
 507                         # Denote if username is redacted for this edit
 508                         if ( $rev->isDeleted( Revision::DELETED_USER ) ) {
 509                                 $templateParams['rev-deleted-user-contribs'] =
 510                                         $this->msg( 'rev-deleted-user-contribs' )->escaped();
 511                         }
 512
 513                         $templateParser = new TemplateParser();
 514                         $ret = $templateParser->processTemplate(
 515                                 'SpecialContributionsLine',
 516                                 $templateParams
 517                         );
 518                 }
 519
 520                 // Let extensions add data
 521                 Hooks::run( 'ContributionsLineEnding', [ $this, &$ret, $row, &$classes ] );
 522
 523                 // TODO: Handle exceptions in the catch block above.  Do any extensions rely on
 524                 // receiving empty rows?
 525
 526                 if ( $classes === [] && $ret === '' ) {
 527                         wfDebug( "Dropping Special:Contribution row that could not be formatted\n" );
 528                         return "<!-- Could not format Special:Contribution row. -->\n";
 529                 }
 530
 531                 // FIXME: The signature of the ContributionsLineEnding hook makes it
 532                 // very awkward to move this LI wrapper into the template.
 533                 return Html::rawElement( 'li', [ 'class' => $classes ], $ret ) . "\n";
 534         }
 535
 536         /**
 537          * Overwrite Pager function and return a helpful comment
 538          * @return string
 539          */
 540         function getSqlComment() {
 541                 if ( $this->namespace || $this->deletedOnly ) {
 542                         // potentially slow, see CR r58153
 543                         return 'contributions page filtered for namespace or RevisionDeleted edits';
 544                 } else {
 545                         return 'contributions page unfiltered';
 546                 }
 547         }
 548
 549         protected function preventClickjacking() {
 550                 $this->preventClickjacking = true;
 551         }
 552
 553         /**
 554          * @return bool
 555          */
 556         public function getPreventClickjacking() {
 557                 return $this->preventClickjacking;
 558         }
 559 }