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<?php
/**
* Created on Oct 3, 2014
*
* Copyright © 2014 Brad Jorsch "bjorsch@wikimedia.org"
*
* Heavily based on ApiQueryDeletedrevs,
* Copyright © 2007 Roan Kattouw "<Firstname>.<Lastname>@gmail.com"
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
/**
* Query module to enumerate all deleted revisions.
*
* @ingroup API
*/
class ApiQueryAllDeletedRevisions extends ApiQueryRevisionsBase {
public function __construct( ApiQuery $query, $moduleName ) {
parent::__construct( $query, $moduleName, 'adr' );
}
/**
* @param ApiPageSet $resultPageSet
* @return void
*/
protected function run( ApiPageSet $resultPageSet = null ) {
$user = $this->getUser();
// Before doing anything at all, let's check permissions
if ( !$user->isAllowed( 'deletedhistory' ) ) {
$this->dieUsage(
'You don\'t have permission to view deleted revision information',
'permissiondenied'
);
}
$db = $this->getDB();
$params = $this->extractRequestParams( false );
$result = $this->getResult();
$pageSet = $this->getPageSet();
$titles = $pageSet->getTitles();
// This module operates in two modes:
// 'user': List deleted revs by a certain user
// 'all': List all deleted revs in NS
$mode = 'all';
if ( !is_null( $params['user'] ) ) {
$mode = 'user';
}
if ( $mode == 'user' ) {
foreach ( array( 'from', 'to', 'prefix', 'excludeuser' ) as $param ) {
if ( !is_null( $params[$param] ) ) {
$p = $this->getModulePrefix();
$this->dieUsage( "The '{$p}{$param}' parameter cannot be used with '{$p}user'",
'badparams' );
}
}
} else {
foreach ( array( 'start', 'end' ) as $param ) {
if ( !is_null( $params[$param] ) ) {
$p = $this->getModulePrefix();
$this->dieUsage( "The '{$p}{$param}' parameter may only be used with '{$p}user'",
'badparams' );
}
}
}
$this->addTables( 'archive' );
if ( $resultPageSet === null ) {
$this->parseParameters( $params );
$this->addFields( Revision::selectArchiveFields() );
$this->addFields( array( 'ar_title', 'ar_namespace' ) );
} else {
$this->limit = $this->getParameter( 'limit' ) ?: 10;
$this->addFields( array( 'ar_title', 'ar_namespace', 'ar_timestamp', 'ar_rev_id', 'ar_id' ) );
}
if ( $this->fld_tags ) {
$this->addTables( 'tag_summary' );
$this->addJoinConds(
array( 'tag_summary' => array( 'LEFT JOIN', array( 'ar_rev_id=ts_rev_id' ) ) )
);
$this->addFields( 'ts_tags' );
}
if ( !is_null( $params['tag'] ) ) {
$this->addTables( 'change_tag' );
$this->addJoinConds(
array( 'change_tag' => array( 'INNER JOIN', array( 'ar_rev_id=ct_rev_id' ) ) )
);
$this->addWhereFld( 'ct_tag', $params['tag'] );
}
if ( $this->fetchContent ) {
// Modern MediaWiki has the content for deleted revs in the 'text'
// table using fields old_text and old_flags. But revisions deleted
// pre-1.5 store the content in the 'archive' table directly using
// fields ar_text and ar_flags, and no corresponding 'text' row. So
// we have to LEFT JOIN and fetch all four fields.
$this->addTables( 'text' );
$this->addJoinConds(
array( 'text' => array( 'LEFT JOIN', array( 'ar_text_id=old_id' ) ) )
);
$this->addFields( array( 'ar_text', 'ar_flags', 'old_text', 'old_flags' ) );
// This also means stricter restrictions
if ( !$user->isAllowedAny( 'undelete', 'deletedtext' ) ) {
$this->dieUsage(
'You don\'t have permission to view deleted revision content',
'permissiondenied'
);
}
}
$dir = $params['dir'];
$miser_ns = null;
if ( $mode == 'all' ) {
if ( $params['namespace'] !== null ) {
$namespaces = $params['namespace'];
$this->addWhereFld( 'ar_namespace', $namespaces );
} else {
$namespaces = MWNamespace::getValidNamespaces();
}
// For from/to/prefix, we have to consider the potential
// transformations of the title in all specified namespaces.
// Generally there will be only one transformation, but wikis with
// some namespaces case-sensitive could have two.
if ( $params['from'] !== null || $params['to'] !== null ) {
$isDirNewer = ( $dir === 'newer' );
$after = ( $isDirNewer ? '>=' : '<=' );
$before = ( $isDirNewer ? '<=' : '>=' );
$where = array();
foreach ( $namespaces as $ns ) {
$w = array();
if ( $params['from'] !== null ) {
$w[] = 'ar_title' . $after .
$db->addQuotes( $this->titlePartToKey( $params['from'], $ns ) );
}
if ( $params['to'] !== null ) {
$w[] = 'ar_title' . $before .
$db->addQuotes( $this->titlePartToKey( $params['to'], $ns ) );
}
$w = $db->makeList( $w, LIST_AND );
$where[$w][] = $ns;
}
if ( count( $where ) == 1 ) {
$where = key( $where );
$this->addWhere( $where );
} else {
$where2 = array();
foreach ( $where as $w => $ns ) {
$where2[] = $db->makeList( array( $w, 'ar_namespace' => $ns ), LIST_AND );
}
$this->addWhere( $db->makeList( $where2, LIST_OR ) );
}
}
if ( isset( $params['prefix'] ) ) {
$where = array();
foreach ( $namespaces as $ns ) {
$w = 'ar_title' . $db->buildLike(
$this->titlePartToKey( $params['prefix'], $ns ),
$db->anyString() );
$where[$w][] = $ns;
}
if ( count( $where ) == 1 ) {
$where = key( $where );
$this->addWhere( $where );
} else {
$where2 = array();
foreach ( $where as $w => $ns ) {
$where2[] = $db->makeList( array( $w, 'ar_namespace' => $ns ), LIST_AND );
}
$this->addWhere( $db->makeList( $where2, LIST_OR ) );
}
}
} else {
if ( $this->getConfig()->get( 'MiserMode' ) ) {
$miser_ns = $params['namespace'];
} else {
$this->addWhereFld( 'ar_namespace', $params['namespace'] );
}
$this->addTimestampWhereRange( 'ar_timestamp', $dir, $params['start'], $params['end'] );
}
if ( !is_null( $params['user'] ) ) {
$this->addWhereFld( 'ar_user_text', $params['user'] );
} elseif ( !is_null( $params['excludeuser'] ) ) {
$this->addWhere( 'ar_user_text != ' .
$db->addQuotes( $params['excludeuser'] ) );
}
if ( !is_null( $params['user'] ) || !is_null( $params['excludeuser'] ) ) {
// Paranoia: avoid brute force searches (bug 17342)
// (shouldn't be able to get here without 'deletedhistory', but
// check it again just in case)
if ( !$user->isAllowed( 'deletedhistory' ) ) {
$bitmask = Revision::DELETED_USER;
} elseif ( !$user->isAllowedAny( 'suppressrevision', 'viewsuppressed' ) ) {
$bitmask = Revision::DELETED_USER | Revision::DELETED_RESTRICTED;
} else {
$bitmask = 0;
}
if ( $bitmask ) {
$this->addWhere( $db->bitAnd( 'ar_deleted', $bitmask ) . " != $bitmask" );
}
}
if ( !is_null( $params['continue'] ) ) {
$cont = explode( '|', $params['continue'] );
$op = ( $dir == 'newer' ? '>' : '<' );
if ( $mode == 'all' ) {
$this->dieContinueUsageIf( count( $cont ) != 4 );
$ns = intval( $cont[0] );
$this->dieContinueUsageIf( strval( $ns ) !== $cont[0] );
$title = $db->addQuotes( $cont[1] );
$ts = $db->addQuotes( $db->timestamp( $cont[2] ) );
$ar_id = (int)$cont[3];
$this->dieContinueUsageIf( strval( $ar_id ) !== $cont[3] );
$this->addWhere( "ar_namespace $op $ns OR " .
"(ar_namespace = $ns AND " .
"(ar_title $op $title OR " .
"(ar_title = $title AND " .
"(ar_timestamp $op $ts OR " .
"(ar_timestamp = $ts AND " .
"ar_id $op= $ar_id)))))" );
} else {
$this->dieContinueUsageIf( count( $cont ) != 2 );
$ts = $db->addQuotes( $db->timestamp( $cont[0] ) );
$ar_id = (int)$cont[1];
$this->dieContinueUsageIf( strval( $ar_id ) !== $cont[1] );
$this->addWhere( "ar_timestamp $op $ts OR " .
"(ar_timestamp = $ts AND " .
"ar_id $op= $ar_id)" );
}
}
$this->addOption( 'LIMIT', $this->limit + 1 );
$sort = ( $dir == 'newer' ? '' : ' DESC' );
$orderby = array();
if ( $mode == 'all' ) {
// Targeting index name_title_timestamp
if ( $params['namespace'] === null || count( array_unique( $params['namespace'] ) ) > 1 ) {
$orderby[] = "ar_namespace $sort";
}
$orderby[] = "ar_title $sort";
$orderby[] = "ar_timestamp $sort";
$orderby[] = "ar_id $sort";
} else {
// Targeting index usertext_timestamp
// 'user' is always constant.
$orderby[] = "ar_timestamp $sort";
$orderby[] = "ar_id $sort";
}
$this->addOption( 'ORDER BY', $orderby );
$res = $this->select( __METHOD__ );
$pageMap = array(); // Maps ns&title to array index
$count = 0;
$nextIndex = 0;
$generated = array();
foreach ( $res as $row ) {
if ( ++$count > $this->limit ) {
// We've had enough
if ( $mode == 'all' ) {
$this->setContinueEnumParameter( 'continue',
"$row->ar_namespace|$row->ar_title|$row->ar_timestamp|$row->ar_id"
);
} else {
$this->setContinueEnumParameter( 'continue', "$row->ar_timestamp|$row->ar_id" );
}
break;
}
// Miser mode namespace check
if ( $miser_ns !== null && !in_array( $row->ar_namespace, $miser_ns ) ) {
continue;
}
if ( $resultPageSet !== null ) {
if ( $params['generatetitles'] ) {
$key = "{$row->ar_namespace}:{$row->ar_title}";
if ( !isset( $generated[$key] ) ) {
$generated[$key] = Title::makeTitle( $row->ar_namespace, $row->ar_title );
}
} else {
$generated[] = $row->ar_rev_id;
}
} else {
$revision = Revision::newFromArchiveRow( $row );
$rev = $this->extractRevisionInfo( $revision, $row );
if ( !isset( $pageMap[$row->ar_namespace][$row->ar_title] ) ) {
$index = $nextIndex++;
$pageMap[$row->ar_namespace][$row->ar_title] = $index;
$title = $revision->getTitle();
$a = array(
'pageid' => $title->getArticleID(),
'revisions' => array( $rev ),
);
ApiResult::setIndexedTagName( $a['revisions'], 'rev' );
ApiQueryBase::addTitleInfo( $a, $title );
$fit = $result->addValue( array( 'query', $this->getModuleName() ), $index, $a );
} else {
$index = $pageMap[$row->ar_namespace][$row->ar_title];
$fit = $result->addValue(
array( 'query', $this->getModuleName(), $index, 'revisions' ),
null, $rev );
}
if ( !$fit ) {
if ( $mode == 'all' ) {
$this->setContinueEnumParameter( 'continue',
"$row->ar_namespace|$row->ar_title|$row->ar_timestamp|$row->ar_id"
);
} else {
$this->setContinueEnumParameter( 'continue', "$row->ar_timestamp|$row->ar_id" );
}
break;
}
}
}
if ( $resultPageSet !== null ) {
if ( $params['generatetitles'] ) {
$resultPageSet->populateFromTitles( $generated );
} else {
$resultPageSet->populateFromRevisionIDs( $generated );
}
} else {
$result->addIndexedTagName( array( 'query', $this->getModuleName() ), 'page' );
}
}
public function getAllowedParams() {
$ret = parent::getAllowedParams() + array(
'user' => array(
ApiBase::PARAM_TYPE => 'user'
),
'namespace' => array(
ApiBase::PARAM_ISMULTI => true,
ApiBase::PARAM_TYPE => 'namespace',
ApiBase::PARAM_DFLT => null,
),
'start' => array(
ApiBase::PARAM_TYPE => 'timestamp',
ApiBase::PARAM_HELP_MSG_INFO => array( array( 'useronly' ) ),
),
'end' => array(
ApiBase::PARAM_TYPE => 'timestamp',
ApiBase::PARAM_HELP_MSG_INFO => array( array( 'useronly' ) ),
),
'dir' => array(
ApiBase::PARAM_TYPE => array(
'newer',
'older'
),
ApiBase::PARAM_DFLT => 'older',
ApiBase::PARAM_HELP_MSG => 'api-help-param-direction',
),
'from' => array(
ApiBase::PARAM_HELP_MSG_INFO => array( array( 'nonuseronly' ) ),
),
'to' => array(
ApiBase::PARAM_HELP_MSG_INFO => array( array( 'nonuseronly' ) ),
),
'prefix' => array(
ApiBase::PARAM_HELP_MSG_INFO => array( array( 'nonuseronly' ) ),
),
'excludeuser' => array(
ApiBase::PARAM_TYPE => 'user',
ApiBase::PARAM_HELP_MSG_INFO => array( array( 'nonuseronly' ) ),
),
'tag' => null,
'continue' => array(
ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
),
'generatetitles' => array(
ApiBase::PARAM_DFLT => false
),
);
if ( $this->getConfig()->get( 'MiserMode' ) ) {
$ret['user'][ApiBase::PARAM_HELP_MSG_APPEND] = array(
'apihelp-query+alldeletedrevisions-param-miser-user-namespace',
);
$ret['namespace'][ApiBase::PARAM_HELP_MSG_APPEND] = array(
'apihelp-query+alldeletedrevisions-param-miser-user-namespace',
);
}
return $ret;
}
protected function getExamplesMessages() {
return array(
'action=query&list=alldeletedrevisions&adruser=Example&adrlimit=50'
=> 'apihelp-query+alldeletedrevisions-example-user',
'action=query&list=alldeletedrevisions&adrdir=newer&adrlimit=50'
=> 'apihelp-query+alldeletedrevisions-example-ns-main',
);
}
public function getHelpUrls() {
return 'https://www.mediawiki.org/wiki/API:Alldeletedrevisions';
}
}
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