includes/specials/pagers/DeletedContribsPager.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  * @ingroup Pager
  24  */
  25 use MediaWiki\MediaWikiServices;
  26 use Wikimedia\Rdbms\ResultWrapper;
  27 use Wikimedia\Rdbms\FakeResultWrapper;
  28
  29 class DeletedContribsPager extends IndexPager {
  30
  31         public $mDefaultDirection = IndexPager::DIR_DESCENDING;
  32         public $messages;
  33         public $target;
  34         public $namespace = '';
  35         public $mDb;
  36
  37         /**
  38          * @var string Navigation bar with paging links.
  39          */
  40         protected $mNavigationBar;
  41
  42         function __construct( IContextSource $context, $target, $namespace = false ) {
  43                 parent::__construct( $context );
  44                 $msgs = [ 'deletionlog', 'undeleteviewlink', 'diff' ];
  45                 foreach ( $msgs as $msg ) {
  46                         $this->messages[$msg] = $this->msg( $msg )->text();
  47                 }
  48                 $this->target = $target;
  49                 $this->namespace = $namespace;
  50                 $this->mDb = wfGetDB( DB_REPLICA, 'contributions' );
  51         }
  52
  53         function getDefaultQuery() {
  54                 $query = parent::getDefaultQuery();
  55                 $query['target'] = $this->target;
  56
  57                 return $query;
  58         }
  59
  60         function getQueryInfo() {
  61                 list( $index, $userCond ) = $this->getUserCond();
  62                 $conds = array_merge( $userCond, $this->getNamespaceCond() );
  63                 $user = $this->getUser();
  64                 // Paranoia: avoid brute force searches (T19792)
  65                 if ( !$user->isAllowed( 'deletedhistory' ) ) {
  66                         $conds[] = $this->mDb->bitAnd( 'ar_deleted', Revision::DELETED_USER ) . ' = 0';
  67                 } elseif ( !$user->isAllowedAny( 'suppressrevision', 'viewsuppressed' ) ) {
  68                         $conds[] = $this->mDb->bitAnd( 'ar_deleted', Revision::SUPPRESSED_USER ) .
  69                                 ' != ' . Revision::SUPPRESSED_USER;
  70                 }
  71
  72                 $commentQuery = CommentStore::newKey( 'ar_comment' )->getJoin();
  73
  74                 return [
  75                         'tables' => [ 'archive' ] + $commentQuery['tables'],
  76                         'fields' => [
  77                                 'ar_rev_id', 'ar_namespace', 'ar_title', 'ar_timestamp',
  78                                 'ar_minor_edit', 'ar_user', 'ar_user_text', 'ar_deleted'
  79                         ] + $commentQuery['fields'],
  80                         'conds' => $conds,
  81                         'options' => [ 'USE INDEX' => [ 'archive' => $index ] ],
  82                         'join_conds' => $commentQuery['joins'],
  83                 ];
  84         }
  85
  86         /**
  87          * This method basically executes the exact same code as the parent class, though with
  88          * a hook added, to allow extensions to add additional queries.
  89          *
  90          * @param string $offset Index offset, inclusive
  91          * @param int $limit Exact query limit
  92          * @param bool $descending Query direction, false for ascending, true for descending
  93          * @return ResultWrapper
  94          */
  95         function reallyDoQuery( $offset, $limit, $descending ) {
  96                 $data = [ parent::reallyDoQuery( $offset, $limit, $descending ) ];
  97
  98                 // This hook will allow extensions to add in additional queries, nearly
  99                 // identical to ContribsPager::reallyDoQuery.
 100                 Hooks::run(
 101                         'DeletedContribsPager::reallyDoQuery',
 102                         [ &$data, $this, $offset, $limit, $descending ]
 103                 );
 104
 105                 $result = [];
 106
 107                 // loop all results and collect them in an array
 108                 foreach ( $data as $query ) {
 109                         foreach ( $query as $i => $row ) {
 110                                 // use index column as key, allowing us to easily sort in PHP
 111                                 $result[$row->{$this->getIndexField()} . "-$i"] = $row;
 112                         }
 113                 }
 114
 115                 // sort results
 116                 if ( $descending ) {
 117                         ksort( $result );
 118                 } else {
 119                         krsort( $result );
 120                 }
 121
 122                 // enforce limit
 123                 $result = array_slice( $result, 0, $limit );
 124
 125                 // get rid of array keys
 126                 $result = array_values( $result );
 127
 128                 return new FakeResultWrapper( $result );
 129         }
 130
 131         function getUserCond() {
 132                 $condition = [];
 133
 134                 $condition['ar_user_text'] = $this->target;
 135                 $index = 'ar_usertext_timestamp';
 136
 137                 return [ $index, $condition ];
 138         }
 139
 140         function getIndexField() {
 141                 return 'ar_timestamp';
 142         }
 143
 144         function getStartBody() {
 145                 return "<ul>\n";
 146         }
 147
 148         function getEndBody() {
 149                 return "</ul>\n";
 150         }
 151
 152         function getNavigationBar() {
 153                 if ( isset( $this->mNavigationBar ) ) {
 154                         return $this->mNavigationBar;
 155                 }
 156
 157                 $linkTexts = [
 158                         'prev' => $this->msg( 'pager-newer-n' )->numParams( $this->mLimit )->escaped(),
 159                         'next' => $this->msg( 'pager-older-n' )->numParams( $this->mLimit )->escaped(),
 160                         'first' => $this->msg( 'histlast' )->escaped(),
 161                         'last' => $this->msg( 'histfirst' )->escaped()
 162                 ];
 163
 164                 $pagingLinks = $this->getPagingLinks( $linkTexts );
 165                 $limitLinks = $this->getLimitLinks();
 166                 $lang = $this->getLanguage();
 167                 $limits = $lang->pipeList( $limitLinks );
 168
 169                 $firstLast = $lang->pipeList( [ $pagingLinks['first'], $pagingLinks['last'] ] );
 170                 $firstLast = $this->msg( 'parentheses' )->rawParams( $firstLast )->escaped();
 171                 $prevNext = $this->msg( 'viewprevnext' )
 172                         ->rawParams(
 173                                 $pagingLinks['prev'],
 174                                 $pagingLinks['next'],
 175                                 $limits
 176                         )->escaped();
 177                 $separator = $this->msg( 'word-separator' )->escaped();
 178                 $this->mNavigationBar = $firstLast . $separator . $prevNext;
 179
 180                 return $this->mNavigationBar;
 181         }
 182
 183         function getNamespaceCond() {
 184                 if ( $this->namespace !== '' ) {
 185                         return [ 'ar_namespace' => (int)$this->namespace ];
 186                 } else {
 187                         return [];
 188                 }
 189         }
 190
 191         /**
 192          * Generates each row in the contributions list.
 193          *
 194          * @todo This would probably look a lot nicer in a table.
 195          * @param stdClass $row
 196          * @return string
 197          */
 198         function formatRow( $row ) {
 199                 $ret = '';
 200                 $classes = [];
 201                 $attribs = [];
 202
 203                 /*
 204                  * There may be more than just revision rows. To make sure that we'll only be processing
 205                  * revisions here, let's _try_ to build a revision out of our row (without displaying
 206                  * notices though) and then trying to grab data from the built object. If we succeed,
 207                  * we're definitely dealing with revision data and we may proceed, if not, we'll leave it
 208                  * to extensions to subscribe to the hook to parse the row.
 209                  */
 210                 MediaWiki\suppressWarnings();
 211                 try {
 212                         $rev = Revision::newFromArchiveRow( $row );
 213                         $validRevision = (bool)$rev->getId();
 214                 } catch ( Exception $e ) {
 215                         $validRevision = false;
 216                 }
 217                 MediaWiki\restoreWarnings();
 218
 219                 if ( $validRevision ) {
 220                         $attribs['data-mw-revid'] = $rev->getId();
 221                         $ret = $this->formatRevisionRow( $row );
 222                 }
 223
 224                 // Let extensions add data
 225                 Hooks::run( 'DeletedContributionsLineEnding', [ $this, &$ret, $row, &$classes, &$attribs ] );
 226                 $attribs = wfArrayFilterByKey( $attribs, [ Sanitizer::class, 'isReservedDataAttribute' ] );
 227
 228                 if ( $classes === [] && $attribs === [] && $ret === '' ) {
 229                         wfDebug( "Dropping Special:DeletedContribution row that could not be formatted\n" );
 230                         $ret = "<!-- Could not format Special:DeletedContribution row. -->\n";
 231                 } else {
 232                         $attribs['class'] = $classes;
 233                         $ret = Html::rawElement( 'li', $attribs, $ret ) . "\n";
 234                 }
 235
 236                 return $ret;
 237         }
 238
 239         /**
 240          * Generates each row in the contributions list for archive entries.
 241          *
 242          * Contributions which are marked "top" are currently on top of the history.
 243          * For these contributions, a [rollback] link is shown for users with sysop
 244          * privileges. The rollback link restores the most recent version that was not
 245          * written by the target user.
 246          *
 247          * @todo This would probably look a lot nicer in a table.
 248          * @param stdClass $row
 249          * @return string
 250          */
 251         function formatRevisionRow( $row ) {
 252                 $page = Title::makeTitle( $row->ar_namespace, $row->ar_title );
 253
 254                 $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
 255
 256                 $rev = new Revision( [
 257                         'title' => $page,
 258                         'id' => $row->ar_rev_id,
 259                         'comment' => CommentStore::newKey( 'ar_comment' )->getComment( $row )->text,
 260                         'user' => $row->ar_user,
 261                         'user_text' => $row->ar_user_text,
 262                         'timestamp' => $row->ar_timestamp,
 263                         'minor_edit' => $row->ar_minor_edit,
 264                         'deleted' => $row->ar_deleted,
 265                 ] );
 266
 267                 $undelete = SpecialPage::getTitleFor( 'Undelete' );
 268
 269                 $logs = SpecialPage::getTitleFor( 'Log' );
 270                 $dellog = $linkRenderer->makeKnownLink(
 271                         $logs,
 272                         $this->messages['deletionlog'],
 273                         [],
 274                         [
 275                                 'type' => 'delete',
 276                                 'page' => $page->getPrefixedText()
 277                         ]
 278                 );
 279
 280                 $reviewlink = $linkRenderer->makeKnownLink(
 281                         SpecialPage::getTitleFor( 'Undelete', $page->getPrefixedDBkey() ),
 282                         $this->messages['undeleteviewlink']
 283                 );
 284
 285                 $user = $this->getUser();
 286
 287                 if ( $user->isAllowed( 'deletedtext' ) ) {
 288                         $last = $linkRenderer->makeKnownLink(
 289                                 $undelete,
 290                                 $this->messages['diff'],
 291                                 [],
 292                                 [
 293                                         'target' => $page->getPrefixedText(),
 294                                         'timestamp' => $rev->getTimestamp(),
 295                                         'diff' => 'prev'
 296                                 ]
 297                         );
 298                 } else {
 299                         $last = htmlspecialchars( $this->messages['diff'] );
 300                 }
 301
 302                 $comment = Linker::revComment( $rev );
 303                 $date = $this->getLanguage()->userTimeAndDate( $rev->getTimestamp(), $user );
 304
 305                 if ( !$user->isAllowed( 'undelete' ) || !$rev->userCan( Revision::DELETED_TEXT, $user ) ) {
 306                         $link = htmlspecialchars( $date ); // unusable link
 307                 } else {
 308                         $link = $linkRenderer->makeKnownLink(
 309                                 $undelete,
 310                                 $date,
 311                                 [ 'class' => 'mw-changeslist-date' ],
 312                                 [
 313                                         'target' => $page->getPrefixedText(),
 314                                         'timestamp' => $rev->getTimestamp()
 315                                 ]
 316                         );
 317                 }
 318                 // Style deleted items
 319                 if ( $rev->isDeleted( Revision::DELETED_TEXT ) ) {
 320                         $link = '<span class="history-deleted">' . $link . '</span>';
 321                 }
 322
 323                 $pagelink = $linkRenderer->makeLink(
 324                         $page,
 325                         null,
 326                         [ 'class' => 'mw-changeslist-title' ]
 327                 );
 328
 329                 if ( $rev->isMinor() ) {
 330                         $mflag = ChangesList::flag( 'minor' );
 331                 } else {
 332                         $mflag = '';
 333                 }
 334
 335                 // Revision delete link
 336                 $del = Linker::getRevDeleteLink( $user, $rev, $page );
 337                 if ( $del ) {
 338                         $del .= ' ';
 339                 }
 340
 341                 $tools = Html::rawElement(
 342                         'span',
 343                         [ 'class' => 'mw-deletedcontribs-tools' ],
 344                         $this->msg( 'parentheses' )->rawParams( $this->getLanguage()->pipeList(
 345                                 [ $last, $dellog, $reviewlink ] ) )->escaped()
 346                 );
 347
 348                 $separator = '<span class="mw-changeslist-separator">. .</span>';
 349                 $ret = "{$del}{$link} {$tools} {$separator} {$mflag} {$pagelink} {$comment}";
 350
 351                 # Denote if username is redacted for this edit
 352                 if ( $rev->isDeleted( Revision::DELETED_USER ) ) {
 353                         $ret .= " <strong>" . $this->msg( 'rev-deleted-user-contribs' )->escaped() . "</strong>";
 354                 }
 355
 356                 return $ret;
 357         }
 358
 359         /**
 360          * Get the Database object in use
 361          *
 362          * @return IDatabase
 363          */
 364         public function getDatabase() {
 365                 return $this->mDb;
 366         }
 367 }