includes/revisiondelete/RevisionDeleteAbstracts.php

   1 <?php
   2 /**
   3  * Interface definition for deletable items.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup RevisionDelete
  22  */
  23
  24 /**
  25  * Abstract base class for a list of deletable items. The list class
  26  * needs to be able to make a query from a set of identifiers to pull
  27  * relevant rows, to return RevDelItem subclasses wrapping them, and
  28  * to wrap bulk update operations.
  29  */
  30 abstract class RevDelList extends RevisionListBase {
  31         function __construct( IContextSource $context, Title $title, array $ids ) {
  32                 parent::__construct( $context, $title );
  33                 $this->ids = $ids;
  34         }
  35
  36         /**
  37          * Get the DB field name associated with the ID list.
  38          * This used to populate the log_search table for finding log entries.
  39          * Override this function.
  40          * @return string|null
  41          */
  42         public static function getRelationType() {
  43                 return null;
  44         }
  45
  46         /**
  47          * Get the user right required for this list type
  48          * Override this function.
  49          * @since 1.22
  50          * @return string|null
  51          */
  52         public static function getRestriction() {
  53                 return null;
  54         }
  55
  56         /**
  57          * Get the revision deletion constant for this list type
  58          * Override this function.
  59          * @since 1.22
  60          * @return int|null
  61          */
  62         public static function getRevdelConstant() {
  63                 return null;
  64         }
  65
  66         /**
  67          * Suggest a target for the revision deletion
  68          * Optionally override this function.
  69          * @since 1.22
  70          * @param Title|null $target User-supplied target
  71          * @param array $ids
  72          * @return Title|null
  73          */
  74         public static function suggestTarget( $target, array $ids ) {
  75                 return $target;
  76         }
  77
  78         /**
  79          * Set the visibility for the revisions in this list. Logging and
  80          * transactions are done here.
  81          *
  82          * @param array $params Associative array of parameters. Members are:
  83          *     value:         The integer value to set the visibility to
  84          *     comment:       The log comment.
  85          *     perItemStatus: Set if you want per-item status reports
  86          * @return Status
  87          * @since 1.23 Added 'perItemStatus' param
  88          */
  89         public function setVisibility( $params ) {
  90                 $bitPars = $params['value'];
  91                 $comment = $params['comment'];
  92                 $perItemStatus = isset( $params['perItemStatus'] ) ? $params['perItemStatus'] : false;
  93
  94                 $this->res = false;
  95                 $dbw = wfGetDB( DB_MASTER );
  96                 $this->doQuery( $dbw );
  97                 $dbw->begin( __METHOD__ );
  98                 $status = Status::newGood();
  99                 $missing = array_flip( $this->ids );
 100                 $this->clearFileOps();
 101                 $idsForLog = array();
 102                 $authorIds = $authorIPs = array();
 103
 104                 if ( $perItemStatus ) {
 105                         $status->itemStatuses = array();
 106                 }
 107
 108                 for ( $this->reset(); $this->current(); $this->next() ) {
 109                         $item = $this->current();
 110                         unset( $missing[$item->getId()] );
 111
 112                         if ( $perItemStatus ) {
 113                                 $itemStatus = Status::newGood();
 114                                 $status->itemStatuses[$item->getId()] = $itemStatus;
 115                         } else {
 116                                 $itemStatus = $status;
 117                         }
 118
 119                         $oldBits = $item->getBits();
 120                         // Build the actual new rev_deleted bitfield
 121                         $newBits = RevisionDeleter::extractBitfield( $bitPars, $oldBits );
 122
 123                         if ( $oldBits == $newBits ) {
 124                                 $itemStatus->warning( 'revdelete-no-change', $item->formatDate(), $item->formatTime() );
 125                                 $status->failCount++;
 126                                 continue;
 127                         } elseif ( $oldBits == 0 && $newBits != 0 ) {
 128                                 $opType = 'hide';
 129                         } elseif ( $oldBits != 0 && $newBits == 0 ) {
 130                                 $opType = 'show';
 131                         } else {
 132                                 $opType = 'modify';
 133                         }
 134
 135                         if ( $item->isHideCurrentOp( $newBits ) ) {
 136                                 // Cannot hide current version text
 137                                 $itemStatus->error( 'revdelete-hide-current', $item->formatDate(), $item->formatTime() );
 138                                 $status->failCount++;
 139                                 continue;
 140                         }
 141                         if ( !$item->canView() ) {
 142                                 // Cannot access this revision
 143                                 $msg = ( $opType == 'show' ) ?
 144                                         'revdelete-show-no-access' : 'revdelete-modify-no-access';
 145                                 $itemStatus->error( $msg, $item->formatDate(), $item->formatTime() );
 146                                 $status->failCount++;
 147                                 continue;
 148                         }
 149                         // Cannot just "hide from Sysops" without hiding any fields
 150                         if ( $newBits == Revision::DELETED_RESTRICTED ) {
 151                                 $itemStatus->warning( 'revdelete-only-restricted', $item->formatDate(), $item->formatTime() );
 152                                 $status->failCount++;
 153                                 continue;
 154                         }
 155
 156                         // Update the revision
 157                         $ok = $item->setBits( $newBits );
 158
 159                         if ( $ok ) {
 160                                 $idsForLog[] = $item->getId();
 161                                 $status->successCount++;
 162                                 if ( $item->getAuthorId() > 0 ) {
 163                                         $authorIds[] = $item->getAuthorId();
 164                                 } elseif ( IP::isIPAddress( $item->getAuthorName() ) ) {
 165                                         $authorIPs[] = $item->getAuthorName();
 166                                 }
 167                         } else {
 168                                 $itemStatus->error( 'revdelete-concurrent-change', $item->formatDate(), $item->formatTime() );
 169                                 $status->failCount++;
 170                         }
 171                 }
 172
 173                 // Handle missing revisions
 174                 foreach ( $missing as $id => $unused ) {
 175                         if ( $perItemStatus ) {
 176                                 $status->itemStatuses[$id] = Status::newFatal( 'revdelete-modify-missing', $id );
 177                         } else {
 178                                 $status->error( 'revdelete-modify-missing', $id );
 179                         }
 180                         $status->failCount++;
 181                 }
 182
 183                 if ( $status->successCount == 0 ) {
 184                         $dbw->rollback( __METHOD__ );
 185                         return $status;
 186                 }
 187
 188                 // Save success count
 189                 $successCount = $status->successCount;
 190
 191                 // Move files, if there are any
 192                 $status->merge( $this->doPreCommitUpdates() );
 193                 if ( !$status->isOK() ) {
 194                         // Fatal error, such as no configured archive directory
 195                         $dbw->rollback( __METHOD__ );
 196                         return $status;
 197                 }
 198
 199                 // Log it
 200                 $this->updateLog( array(
 201                         'title' => $this->title,
 202                         'count' => $successCount,
 203                         'newBits' => $newBits,
 204                         'oldBits' => $oldBits,
 205                         'comment' => $comment,
 206                         'ids' => $idsForLog,
 207                         'authorIds' => $authorIds,
 208                         'authorIPs' => $authorIPs
 209                 ) );
 210                 $dbw->commit( __METHOD__ );
 211
 212                 // Clear caches
 213                 $status->merge( $this->doPostCommitUpdates() );
 214                 return $status;
 215         }
 216
 217         /**
 218          * Reload the list data from the master DB. This can be done after setVisibility()
 219          * to allow $item->getHTML() to show the new data.
 220          */
 221         function reloadFromMaster() {
 222                 $dbw = wfGetDB( DB_MASTER );
 223                 $this->res = $this->doQuery( $dbw );
 224         }
 225
 226         /**
 227          * Record a log entry on the action
 228          * @param array $params Associative array of parameters:
 229          *     newBits:         The new value of the *_deleted bitfield
 230          *     oldBits:         The old value of the *_deleted bitfield.
 231          *     title:           The target title
 232          *     ids:             The ID list
 233          *     comment:         The log comment
 234          *     authorsIds:      The array of the user IDs of the offenders
 235          *     authorsIPs:      The array of the IP/anon user offenders
 236          * @throws MWException
 237          */
 238         protected function updateLog( $params ) {
 239                 // Get the URL param's corresponding DB field
 240                 $field = RevisionDeleter::getRelationType( $this->getType() );
 241                 if ( !$field ) {
 242                         throw new MWException( "Bad log URL param type!" );
 243                 }
 244                 // Put things hidden from sysops in the oversight log
 245                 if ( ( $params['newBits'] | $params['oldBits'] ) & $this->getSuppressBit() ) {
 246                         $logType = 'suppress';
 247                 } else {
 248                         $logType = 'delete';
 249                 }
 250                 // Add params for effected page and ids
 251                 $logParams = $this->getLogParams( $params );
 252                 // Actually add the deletion log entry
 253                 $log = new LogPage( $logType );
 254                 $logid = $log->addEntry( $this->getLogAction(), $params['title'],
 255                         $params['comment'], $logParams, $this->getUser() );
 256                 // Allow for easy searching of deletion log items for revision/log items
 257                 $log->addRelations( $field, $params['ids'], $logid );
 258                 $log->addRelations( 'target_author_id', $params['authorIds'], $logid );
 259                 $log->addRelations( 'target_author_ip', $params['authorIPs'], $logid );
 260         }
 261
 262         /**
 263          * Get the log action for this list type
 264          * @return string
 265          */
 266         public function getLogAction() {
 267                 return 'revision';
 268         }
 269
 270         /**
 271          * Get log parameter array.
 272          * @param array $params Associative array of log parameters, same as updateLog()
 273          * @return array
 274          */
 275         public function getLogParams( $params ) {
 276                 return array(
 277                         $this->getType(),
 278                         implode( ',', $params['ids'] ),
 279                         "ofield={$params['oldBits']}",
 280                         "nfield={$params['newBits']}"
 281                 );
 282         }
 283
 284         /**
 285          * Clear any data structures needed for doPreCommitUpdates() and doPostCommitUpdates()
 286          * STUB
 287          */
 288         public function clearFileOps() {
 289         }
 290
 291         /**
 292          * A hook for setVisibility(): do batch updates pre-commit.
 293          * STUB
 294          * @return Status
 295          */
 296         public function doPreCommitUpdates() {
 297                 return Status::newGood();
 298         }
 299
 300         /**
 301          * A hook for setVisibility(): do any necessary updates post-commit.
 302          * STUB
 303          * @return Status
 304          */
 305         public function doPostCommitUpdates() {
 306                 return Status::newGood();
 307         }
 308
 309         /**
 310          * Get the integer value of the flag used for suppression
 311          */
 312         abstract public function getSuppressBit();
 313 }
 314
 315 /**
 316  * Abstract base class for deletable items
 317  */
 318 abstract class RevDelItem extends RevisionItemBase {
 319         /**
 320          * Returns true if the item is "current", and the operation to set the given
 321          * bits can't be executed for that reason
 322          * STUB
 323          * @return bool
 324          */
 325         public function isHideCurrentOp( $newBits ) {
 326                 return false;
 327         }
 328
 329         /**
 330          * Get the current deletion bitfield value
 331          */
 332         abstract public function getBits();
 333
 334         /**
 335          * Set the visibility of the item. This should do any necessary DB queries.
 336          *
 337          * The DB update query should have a condition which forces it to only update
 338          * if the value in the DB matches the value fetched earlier with the SELECT.
 339          * If the update fails because it did not match, the function should return
 340          * false. This prevents concurrency problems.
 341          *
 342          * @return bool Success
 343          */
 344         abstract public function setBits( $newBits );
 345
 346         /**
 347          * Get the return information about the revision for the API
 348          * @since 1.23
 349          * @param ApiResult $result API result object
 350          * @return array Data for the API result
 351          */
 352         abstract public function getApiData( ApiResult $result );
 353 }