includes/api/ApiQueryDeletedrevs.php

   1 <?php
   2 /**
   3  * API for MediaWiki 1.8+
   4  *
   5  * Created on Jul 2, 2007
   6  *
   7  * Copyright © 2007 Roan Kattouw <Firstname>.<Lastname>@home.nl
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22  * http://www.gnu.org/copyleft/gpl.html
  23  *
  24  * @file
  25  */
  26
  27 if ( !defined( 'MEDIAWIKI' ) ) {
  28         // Eclipse helper - will be ignored in production
  29         require_once( 'ApiQueryBase.php' );
  30 }
  31
  32 /**
  33  * Query module to enumerate all deleted revisions.
  34  *
  35  * @ingroup API
  36  */
  37 class ApiQueryDeletedrevs extends ApiQueryBase {
  38
  39         public function __construct( $query, $moduleName ) {
  40                 parent::__construct( $query, $moduleName, 'dr' );
  41         }
  42
  43         public function execute() {
  44                 global $wgUser;
  45                 // Before doing anything at all, let's check permissions
  46                 if ( !$wgUser->isAllowed( 'deletedhistory' ) ) {
  47                         $this->dieUsage( 'You don\'t have permission to view deleted revision information', 'permissiondenied' );
  48                 }
  49
  50                 $db = $this->getDB();
  51                 $params = $this->extractRequestParams( false );
  52                 $prop = array_flip( $params['prop'] );
  53                 $fld_revid = isset( $prop['revid'] );
  54                 $fld_user = isset( $prop['user'] );
  55                 $fld_comment = isset( $prop['comment'] );
  56                 $fld_parsedcomment = isset ( $prop['parsedcomment'] );
  57                 $fld_minor = isset( $prop['minor'] );
  58                 $fld_len = isset( $prop['len'] );
  59                 $fld_content = isset( $prop['content'] );
  60                 $fld_token = isset( $prop['token'] );
  61
  62                 $result = $this->getResult();
  63                 $pageSet = $this->getPageSet();
  64                 $titles = $pageSet->getTitles();
  65
  66                 // This module operates in three modes:
  67                 // 'revs': List deleted revs for certain titles
  68                 // 'user': List deleted revs by a certain user
  69                 // 'all': List all deleted revs
  70                 $mode = 'all';
  71                 if ( count( $titles ) > 0 ) {
  72                         $mode = 'revs';
  73                 } elseif ( !is_null( $params['user'] ) ) {
  74                         $mode = 'user';
  75                 }
  76
  77                 if ( !is_null( $params['user'] ) && !is_null( $params['excludeuser'] ) ) {
  78                         $this->dieUsage( 'user and excludeuser cannot be used together', 'badparams' );
  79                 }
  80
  81                 $this->addTables( 'archive' );
  82                 $this->addWhere( 'ar_deleted = 0' );
  83                 $this->addFields( array( 'ar_title', 'ar_namespace', 'ar_timestamp' ) );
  84                 if ( $fld_revid ) {
  85                         $this->addFields( 'ar_rev_id' );
  86                 }
  87                 if ( $fld_user ) {
  88                         $this->addFields( 'ar_user_text' );
  89                 }
  90                 if ( $fld_comment || $fld_parsedcomment ) {
  91                         $this->addFields( 'ar_comment' );
  92                 }
  93                 if ( $fld_minor ) {
  94                         $this->addFields( 'ar_minor_edit' );
  95                 }
  96                 if ( $fld_len ) {
  97                         $this->addFields( 'ar_len' );
  98                 }
  99                 if ( $fld_content ) {
 100                         $this->addTables( 'text' );
 101                         $this->addFields( array( 'ar_text', 'ar_text_id', 'old_text', 'old_flags' ) );
 102                         $this->addWhere( 'ar_text_id = old_id' );
 103
 104                         // This also means stricter restrictions
 105                         if ( !$wgUser->isAllowed( 'undelete' ) ) {
 106                                 $this->dieUsage( 'You don\'t have permission to view deleted revision content', 'permissiondenied' );
 107                         }
 108                 }
 109                 // Check limits
 110                 $userMax = $fld_content ? ApiBase::LIMIT_SML1 : ApiBase::LIMIT_BIG1;
 111                 $botMax  = $fld_content ? ApiBase::LIMIT_SML2 : ApiBase::LIMIT_BIG2;
 112
 113                 $limit = $params['limit'];
 114
 115                 if ( $limit == 'max' ) {
 116                         $limit = $this->getMain()->canApiHighLimits() ? $botMax : $userMax;
 117                         $this->getResult()->setParsedLimit( $this->getModuleName(), $limit );
 118                 }
 119
 120                 $this->validateLimit( 'limit', $limit, 1, $userMax, $botMax );
 121
 122                 if ( $fld_token ) {
 123                         // Undelete tokens are identical for all pages, so we cache one here
 124                         $token = $wgUser->editToken();
 125                 }
 126
 127                 // We need a custom WHERE clause that matches all titles.
 128                 if ( $mode == 'revs' ) {
 129                         $lb = new LinkBatch( $titles );
 130                         $where = $lb->constructSet( 'ar', $db );
 131                         $this->addWhere( $where );
 132                 } elseif ( $mode == 'all' ) {
 133                         $this->addWhereFld( 'ar_namespace', $params['namespace'] );
 134                         if ( !is_null( $params['from'] ) ) {
 135                                 $from = $this->getDB()->strencode( $this->titleToKey( $params['from'] ) );
 136                                 $this->addWhere( "ar_title >= '$from'" );
 137                         }
 138                 }
 139
 140                 if ( !is_null( $params['user'] ) ) {
 141                         $this->addWhereFld( 'ar_user_text', $params['user'] );
 142                 } elseif ( !is_null( $params['excludeuser'] ) ) {
 143                         $this->addWhere( 'ar_user_text != ' .
 144                                 $this->getDB()->addQuotes( $params['excludeuser'] ) );
 145                 }
 146
 147                 if ( !is_null( $params['continue'] ) && ( $mode == 'all' || $mode == 'revs' ) )
 148                 {
 149                         $cont = explode( '|', $params['continue'] );
 150                         if ( count( $cont ) != 3 ) {
 151                                 $this->dieUsage( 'Invalid continue param. You should pass the original value returned by the previous query', 'badcontinue' );
 152                         }
 153                         $ns = intval( $cont[0] );
 154                         $title = $this->getDB()->strencode( $this->titleToKey( $cont[1] ) );
 155                         $ts = $this->getDB()->strencode( $cont[2] );
 156                         $op = ( $params['dir'] == 'newer' ? '>' : '<' );
 157                         $this->addWhere( "ar_namespace $op $ns OR " .
 158                                         "(ar_namespace = $ns AND " .
 159                                         "(ar_title $op '$title' OR " .
 160                                         "(ar_title = '$title' AND " .
 161                                         "ar_timestamp $op= '$ts')))" );
 162                 }
 163
 164                 $this->addOption( 'LIMIT', $limit + 1 );
 165                 $this->addOption( 'USE INDEX', array( 'archive' => ( $mode == 'user' ? 'usertext_timestamp' : 'name_title_timestamp' ) ) );
 166                 if ( $mode == 'all' ) {
 167                         if ( $params['unique'] ) {
 168                                 $this->addOption( 'GROUP BY', 'ar_title' );
 169                                 $this->addOption( 'ORDER BY', 'ar_title' );
 170                         } else {
 171                                 $this->addOption( 'ORDER BY', 'ar_title, ar_timestamp' );
 172                         }
 173                 } else {
 174                         if ( $mode == 'revs' ) {
 175                                 // Sort by ns and title in the same order as timestamp for efficiency
 176                                 $this->addWhereRange( 'ar_namespace', $params['dir'], null, null );
 177                                 $this->addWhereRange( 'ar_title', $params['dir'], null, null );
 178                         }
 179                         $this->addWhereRange( 'ar_timestamp', $params['dir'], $params['start'], $params['end'] );
 180                 }
 181                 $res = $this->select( __METHOD__ );
 182                 $pageMap = array(); // Maps ns&title to (fake) pageid
 183                 $count = 0;
 184                 $newPageID = 0;
 185                 foreach ( $res as $row ) {
 186                         if ( ++$count > $limit ) {
 187                                 // We've had enough
 188                                 if ( $mode == 'all' || $mode == 'revs' ) {
 189                                         $this->setContinueEnumParameter( 'continue', intval( $row->ar_namespace ) . '|' .
 190                                                 $this->keyToTitle( $row->ar_title ) . '|' . $row->ar_timestamp );
 191                                 } else {
 192                                         $this->setContinueEnumParameter( 'start', wfTimestamp( TS_ISO_8601, $row->ar_timestamp ) );
 193                                 }
 194                                 break;
 195                         }
 196
 197                         $rev = array();
 198                         $rev['timestamp'] = wfTimestamp( TS_ISO_8601, $row->ar_timestamp );
 199                         if ( $fld_revid ) {
 200                                 $rev['revid'] = intval( $row->ar_rev_id );
 201                         }
 202                         if ( $fld_user ) {
 203                                 $rev['user'] = $row->ar_user_text;
 204                         }
 205                         if ( $fld_comment ) {
 206                                 $rev['comment'] = $row->ar_comment;
 207                         }
 208
 209                         $title = Title::makeTitle( $row->ar_namespace, $row->ar_title );
 210
 211                         if ( $fld_parsedcomment ) {
 212                                 $rev['parsedcomment'] = $wgUser->getSkin()->formatComment( $row->ar_comment, $title );
 213                         }
 214                         if ( $fld_minor && $row->ar_minor_edit == 1 ) {
 215                                 $rev['minor'] = '';
 216                         }
 217                         if ( $fld_len ) {
 218                                 $rev['len'] = $row->ar_len;
 219                         }
 220                         if ( $fld_content ) {
 221                                 ApiResult::setContent( $rev, Revision::getRevisionText( $row ) );
 222                         }
 223
 224                         if ( !isset( $pageMap[$row->ar_namespace][$row->ar_title] ) ) {
 225                                 $pageID = $newPageID++;
 226                                 $pageMap[$row->ar_namespace][$row->ar_title] = $pageID;
 227                                 $a['revisions'] = array( $rev );
 228                                 $result->setIndexedTagName( $a['revisions'], 'rev' );
 229                                 ApiQueryBase::addTitleInfo( $a, $title );
 230                                 if ( $fld_token ) {
 231                                         $a['token'] = $token;
 232                                 }
 233                                 $fit = $result->addValue( array( 'query', $this->getModuleName() ), $pageID, $a );
 234                         } else {
 235                                 $pageID = $pageMap[$row->ar_namespace][$row->ar_title];
 236                                 $fit = $result->addValue(
 237                                         array( 'query', $this->getModuleName(), $pageID, 'revisions' ),
 238                                         null, $rev );
 239                         }
 240                         if ( !$fit ) {
 241                                 if ( $mode == 'all' || $mode == 'revs' ) {
 242                                         $this->setContinueEnumParameter( 'continue', intval( $row->ar_namespace ) . '|' .
 243                                                 $this->keyToTitle( $row->ar_title ) . '|' . $row->ar_timestamp );
 244                                 } else {
 245                                         $this->setContinueEnumParameter( 'start', wfTimestamp( TS_ISO_8601, $row->ar_timestamp ) );
 246                                 }
 247                                 break;
 248                         }
 249                 }
 250                 $result->setIndexedTagName_internal( array( 'query', $this->getModuleName() ), 'page' );
 251         }
 252
 253         public function getAllowedParams() {
 254                 return array(
 255                         'start' => array(
 256                                 ApiBase::PARAM_TYPE => 'timestamp'
 257                         ),
 258                         'end' => array(
 259                                 ApiBase::PARAM_TYPE => 'timestamp',
 260                         ),
 261                         'dir' => array(
 262                                 ApiBase::PARAM_TYPE => array(
 263                                         'newer',
 264                                         'older'
 265                                 ),
 266                                 ApiBase::PARAM_DFLT => 'older'
 267                         ),
 268                         'from' => null,
 269                         'continue' => null,
 270                         'unique' => false,
 271                         'user' => array(
 272                                 ApiBase::PARAM_TYPE => 'user'
 273                         ),
 274                         'excludeuser' => array(
 275                                 ApiBase::PARAM_TYPE => 'user'
 276                         ),
 277                         'namespace' => array(
 278                                 ApiBase::PARAM_TYPE => 'namespace',
 279                                 ApiBase::PARAM_DFLT => 0,
 280                         ),
 281                         'limit' => array(
 282                                 ApiBase::PARAM_DFLT => 10,
 283                                 ApiBase::PARAM_TYPE => 'limit',
 284                                 ApiBase::PARAM_MIN => 1,
 285                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 286                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 287                         ),
 288                         'prop' => array(
 289                                 ApiBase::PARAM_DFLT => 'user|comment',
 290                                 ApiBase::PARAM_TYPE => array(
 291                                         'revid',
 292                                         'user',
 293                                         'comment',
 294                                         'parsedcomment',
 295                                         'minor',
 296                                         'len',
 297                                         'content',
 298                                         'token'
 299                                 ),
 300                                 ApiBase::PARAM_ISMULTI => true
 301                         ),
 302                 );
 303         }
 304
 305         public function getParamDescription() {
 306                 return array(
 307                         'start' => 'The timestamp to start enumerating from (1,2)',
 308                         'end' => 'The timestamp to stop enumerating at (1,2)',
 309                         'dir' => 'The direction in which to enumerate (1,2)',
 310                         'limit' => 'The maximum amount of revisions to list',
 311                         'prop' => array(
 312                                 'Which properties to get',
 313                                 ' revid          - Adds the revision id of the deleted revision',
 314                                 ' user           - Adds user who made the revision',
 315                                 ' comment        - Adds the comment of the revision',
 316                                 ' parsedcomment  - Adds the parsed comment of the revision',
 317                                 ' minor          - Tags if the revision is minor',
 318                                 ' len            - Adds the length of the revision',
 319                                 ' content        - Adds the content of the revision',
 320                                 ' token          - Gives the edit token',
 321                         ),
 322                         'namespace' => 'Only list pages in this namespace (3)',
 323                         'user' => 'Only list revisions by this user',
 324                         'excludeuser' => 'Don\'t list revisions by this user',
 325                         'from' => 'Start listing at this title (3)',
 326                         'continue' => 'When more results are available, use this to continue (3)',
 327                         'unique' => 'List only one revision for each page (3)',
 328                 );
 329         }
 330
 331         public function getDescription() {
 332                 return array(
 333                         'List deleted revisions.',
 334                         'This module operates in three modes:',
 335                         '1) List deleted revisions for the given title(s), sorted by timestamp',
 336                         '2) List deleted contributions for the given user, sorted by timestamp (no titles specified)',
 337                         '3) List all deleted revisions in the given namespace, sorted by title and timestamp (no titles specified, druser not set)',
 338                         'Certain parameters only apply to some modes and are ignored in others.',
 339                         'For instance, a parameter marked (1) only applies to mode 1 and is ignored in modes 2 and 3',
 340                 );
 341         }
 342
 343         public function getPossibleErrors() {
 344                 return array_merge( parent::getPossibleErrors(), array(
 345                         array( 'code' => 'permissiondenied', 'info' => 'You don\'t have permission to view deleted revision information' ),
 346                         array( 'code' => 'badparams', 'info' => 'user and excludeuser cannot be used together' ),
 347                         array( 'code' => 'permissiondenied', 'info' => 'You don\'t have permission to view deleted revision content' ),
 348                         array( 'code' => 'badcontinue', 'info' => 'Invalid continue param. You should pass the original value returned by the previous query' ),
 349                 ) );
 350         }
 351
 352         protected function getExamples() {
 353                 return array(
 354                         'List the last deleted revisions of Main Page and Talk:Main Page, with content (mode 1):',
 355                         '  api.php?action=query&list=deletedrevs&titles=Main%20Page|Talk:Main%20Page&drprop=user|comment|content',
 356                         'List the last 50 deleted contributions by Bob (mode 2):',
 357                         '  api.php?action=query&list=deletedrevs&druser=Bob&drlimit=50',
 358                         'List the first 50 deleted revisions in the main namespace (mode 3):',
 359                         '  api.php?action=query&list=deletedrevs&drdir=newer&drlimit=50',
 360                         'List the first 50 deleted pages in the Talk namespace (mode 3):',
 361                         '  api.php?action=query&list=deletedrevs&drdir=newer&drlimit=50&drnamespace=1&drunique',
 362                 );
 363         }
 364
 365         public function getVersion() {
 366                 return __CLASS__ . ': $Id$';
 367         }
 368 }