includes/api/ApiQueryDeletedrevs.php

   1 <?php
   2
   3 /**
   4  * Created on Jul 2, 2007
   5  *
   6  * API for MediaWiki 1.8+
   7  *
   8  * Copyright © 2007 Roan Kattouw <Firstname>.<Lastname>@home.nl
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License along
  21  * with this program; if not, write to the Free Software Foundation, Inc.,
  22  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  23  * http://www.gnu.org/copyleft/gpl.html
  24  */
  25
  26 if ( !defined( 'MEDIAWIKI' ) ) {
  27         // Eclipse helper - will be ignored in production
  28         require_once( 'ApiQueryBase.php' );
  29 }
  30
  31 /**
  32  * Query module to enumerate all deleted revisions.
  33  *
  34  * @ingroup API
  35  */
  36 class ApiQueryDeletedrevs extends ApiQueryBase {
  37
  38         public function __construct( $query, $moduleName ) {
  39                 parent::__construct( $query, $moduleName, 'dr' );
  40         }
  41
  42         public function execute() {
  43                 global $wgUser;
  44                 // Before doing anything at all, let's check permissions
  45                 if ( !$wgUser->isAllowed( 'deletedhistory' ) ) {
  46                         $this->dieUsage( 'You don\'t have permission to view deleted revision information', 'permissiondenied' );
  47                 }
  48
  49                 $db = $this->getDB();
  50                 $params = $this->extractRequestParams( false );
  51                 $prop = array_flip( $params['prop'] );
  52                 $fld_revid = isset( $prop['revid'] );
  53                 $fld_user = isset( $prop['user'] );
  54                 $fld_comment = isset( $prop['comment'] );
  55                 $fld_parsedcomment = isset ( $prop['parsedcomment'] );
  56                 $fld_minor = isset( $prop['minor'] );
  57                 $fld_len = isset( $prop['len'] );
  58                 $fld_content = isset( $prop['content'] );
  59                 $fld_token = isset( $prop['token'] );
  60
  61                 $result = $this->getResult();
  62                 $pageSet = $this->getPageSet();
  63                 $titles = $pageSet->getTitles();
  64                 $data = array();
  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()->addValue( 'limits', $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                 while ( $row = $db->fetchObject( $res ) ) {
 186                         if ( ++$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                                 global $wgUser;
 213                                 $rev['parsedcomment'] = $wgUser->getSkin()->formatComment( $row->ar_comment, $title );
 214                         }
 215                         if ( $fld_minor && $row->ar_minor_edit == 1 ) {
 216                                 $rev['minor'] = '';
 217                         }
 218                         if ( $fld_len ) {
 219                                 $rev['len'] = $row->ar_len;
 220                         }
 221                         if ( $fld_content ) {
 222                                 ApiResult::setContent( $rev, Revision::getRevisionText( $row ) );
 223                         }
 224
 225                         if ( !isset( $pageMap[$row->ar_namespace][$row->ar_title] ) ) {
 226                                 $pageID = $newPageID++;
 227                                 $pageMap[$row->ar_namespace][$row->ar_title] = $pageID;
 228                                 $a['revisions'] = array( $rev );
 229                                 $result->setIndexedTagName( $a['revisions'], 'rev' );
 230                                 ApiQueryBase::addTitleInfo( $a, $title );
 231                                 if ( $fld_token ) {
 232                                         $a['token'] = $token;
 233                                 }
 234                                 $fit = $result->addValue( array( 'query', $this->getModuleName() ), $pageID, $a );
 235                         } else {
 236                                 $pageID = $pageMap[$row->ar_namespace][$row->ar_title];
 237                                 $fit = $result->addValue(
 238                                         array( 'query', $this->getModuleName(), $pageID, 'revisions' ),
 239                                         null, $rev );
 240                         }
 241                         if ( !$fit ) {
 242                                 if ( $mode == 'all' || $mode == 'revs' ) {
 243                                         $this->setContinueEnumParameter( 'continue', intval( $row->ar_namespace ) . '|' .
 244                                                 $this->keyToTitle( $row->ar_title ) . '|' . $row->ar_timestamp );
 245                                 } else {
 246                                         $this->setContinueEnumParameter( 'start', wfTimestamp( TS_ISO_8601, $row->ar_timestamp ) );
 247                                 }
 248                                 break;
 249                         }
 250                 }
 251                 $result->setIndexedTagName_internal( array( 'query', $this->getModuleName() ), 'page' );
 252         }
 253
 254         public function getAllowedParams() {
 255                 return array(
 256                         'start' => array(
 257                                 ApiBase::PARAM_TYPE => 'timestamp'
 258                         ),
 259                         'end' => array(
 260                                 ApiBase::PARAM_TYPE => 'timestamp',
 261                         ),
 262                         'dir' => array(
 263                                 ApiBase::PARAM_TYPE => array(
 264                                         'newer',
 265                                         'older'
 266                                 ),
 267                                 ApiBase::PARAM_DFLT => 'older'
 268                         ),
 269                         'from' => null,
 270                         'continue' => null,
 271                         'unique' => false,
 272                         'user' => array(
 273                                 ApiBase::PARAM_TYPE => 'user'
 274                         ),
 275                         'excludeuser' => array(
 276                                 ApiBase::PARAM_TYPE => 'user'
 277                         ),
 278                         'namespace' => array(
 279                                 ApiBase::PARAM_TYPE => 'namespace',
 280                                 ApiBase::PARAM_DFLT => 0,
 281                         ),
 282                         'limit' => array(
 283                                 ApiBase::PARAM_DFLT => 10,
 284                                 ApiBase::PARAM_TYPE => 'limit',
 285                                 ApiBase::PARAM_MIN => 1,
 286                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 287                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 288                         ),
 289                         'prop' => array(
 290                                 ApiBase::PARAM_DFLT => 'user|comment',
 291                                 ApiBase::PARAM_TYPE => array(
 292                                         'revid',
 293                                         'user',
 294                                         'comment',
 295                                         'parsedcomment',
 296                                         'minor',
 297                                         'len',
 298                                         'content',
 299                                         'token'
 300                                 ),
 301                                 ApiBase::PARAM_ISMULTI => true
 302                         ),
 303                 );
 304         }
 305
 306         public function getParamDescription() {
 307                 return array(
 308                         'start' => 'The timestamp to start enumerating from (1,2)',
 309                         'end' => 'The timestamp to stop enumerating at (1,2)',
 310                         'dir' => 'The direction in which to enumerate (1,2)',
 311                         'limit' => 'The maximum amount of revisions to list',
 312                         'prop' => 'Which properties to get',
 313                         'namespace' => 'Only list pages in this namespace (3)',
 314                         'user' => 'Only list revisions by this user',
 315                         'excludeuser' => 'Don\'t list revisions by this user',
 316                         'from' => 'Start listing at this title (3)',
 317                         'continue' => 'When more results are available, use this to continue (3)',
 318                         'unique' => 'List only one revision for each page (3)',
 319                 );
 320         }
 321
 322         public function getDescription() {
 323                 return array(
 324                         'List deleted revisions.',
 325                         'This module operates in three modes:',
 326                         '1) List deleted revisions for the given title(s), sorted by timestamp',
 327                         '2) List deleted contributions for the given user, sorted by timestamp (no titles specified)',
 328                         '3) List all deleted revisions in the given namespace, sorted by title and timestamp (no titles specified, druser not set)',
 329                         'Certain parameters only apply to some modes and are ignored in others.',
 330                         'For instance, a parameter marked (1) only applies to mode 1 and is ignored in modes 2 and 3',
 331                 );
 332         }
 333
 334         public function getPossibleErrors() {
 335                 return array_merge( parent::getPossibleErrors(), array(
 336                         array( 'code' => 'permissiondenied', 'info' => 'You don\'t have permission to view deleted revision information' ),
 337                         array( 'code' => 'badparams', 'info' => 'user and excludeuser cannot be used together' ),
 338                         array( 'code' => 'permissiondenied', 'info' => 'You don\'t have permission to view deleted revision content' ),
 339                         array( 'code' => 'badcontinue', 'info' => 'Invalid continue param. You should pass the original value returned by the previous query' ),
 340                 ) );
 341         }
 342
 343         protected function getExamples() {
 344                 return array(
 345                         'List the last deleted revisions of Main Page and Talk:Main Page, with content (mode 1):',
 346                         '  api.php?action=query&list=deletedrevs&titles=Main%20Page|Talk:Main%20Page&drprop=user|comment|content',
 347                         'List the last 50 deleted contributions by Bob (mode 2):',
 348                         '  api.php?action=query&list=deletedrevs&druser=Bob&drlimit=50',
 349                         'List the first 50 deleted revisions in the main namespace (mode 3):',
 350                         '  api.php?action=query&list=deletedrevs&drdir=newer&drlimit=50',
 351                         'List the first 50 deleted pages in the Talk namespace (mode 3):',
 352                         '  api.php?action=query&list=deletedrevs&drdir=newer&drlimit=50&drnamespace=1&drunique',
 353                 );
 354         }
 355
 356         public function getVersion() {
 357                 return __CLASS__ . ': $Id$';
 358         }
 359 }