5 * Created on July 7, 2007
7 * Copyright © 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
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.
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.
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
27 if ( !defined( 'MEDIAWIKI' ) ) {
28 // Eclipse helper - will be ignored in production
29 require_once( 'ApiQueryBase.php' );
33 * Query module to enumerate links from all pages together.
37 class ApiQueryAllLinks
extends ApiQueryGeneratorBase
{
39 public function __construct( $query, $moduleName ) {
40 parent
::__construct( $query, $moduleName, 'al' );
43 public function execute() {
47 public function getCacheMode( $params ) {
51 public function executeGenerator( $resultPageSet ) {
52 $this->run( $resultPageSet );
56 * @param $resultPageSet ApiPageSet
59 private function run( $resultPageSet = null ) {
61 $params = $this->extractRequestParams();
63 $prop = array_flip( $params['prop'] );
64 $fld_ids = isset( $prop['ids'] );
65 $fld_title = isset( $prop['title'] );
67 if ( $params['unique'] ) {
68 if ( !is_null( $resultPageSet ) ) {
69 $this->dieUsage( $this->getModuleName() . ' cannot be used as a generator in unique links mode', 'params' );
72 $this->dieUsage( $this->getModuleName() . ' cannot return corresponding page ids in unique links mode', 'params' );
74 $this->addOption( 'DISTINCT' );
77 $this->addTables( 'pagelinks' );
78 $this->addWhereFld( 'pl_namespace', $params['namespace'] );
80 if ( !is_null( $params['from'] ) && !is_null( $params['continue'] ) ) {
81 $this->dieUsage( 'alcontinue and alfrom cannot be used together', 'params' );
83 if ( !is_null( $params['continue'] ) ) {
84 $arr = explode( '|', $params['continue'] );
85 if ( count( $arr ) != 2 ) {
86 $this->dieUsage( 'Invalid continue parameter', 'badcontinue' );
88 $from = $this->getDB()->strencode( $this->titleToKey( $arr[0] ) );
89 $id = intval( $arr[1] );
91 "pl_title > '$from' OR " .
92 "(pl_title = '$from' AND " .
97 $from = ( is_null( $params['from'] ) ?
null : $this->titlePartToKey( $params['from'] ) );
98 $to = ( is_null( $params['to'] ) ?
null : $this->titlePartToKey( $params['to'] ) );
99 $this->addWhereRange( 'pl_title', 'newer', $from, $to );
101 if ( isset( $params['prefix'] ) ) {
102 $this->addWhere( 'pl_title' . $db->buildLike( $this->titlePartToKey( $params['prefix'] ), $db->anyString() ) );
105 $this->addFields( 'pl_title' );
106 $this->addFieldsIf( 'pl_from', !$params['unique'] );
108 $this->addOption( 'USE INDEX', 'pl_namespace' );
109 $limit = $params['limit'];
110 $this->addOption( 'LIMIT', $limit +
1 );
112 if ( !$params['unique'] ) {
113 $this->addOption( 'ORDER BY', 'pl_title, pl_from' );
116 $res = $this->select( __METHOD__
);
120 $result = $this->getResult();
121 foreach ( $res as $row ) {
122 if ( ++
$count > $limit ) {
123 // We've reached the one extra which shows that there are additional pages to be had. Stop here...
124 // TODO: Security issue - if the user has no right to view next title, it will still be shown
125 if ( $params['unique'] ) {
126 $this->setContinueEnumParameter( 'from', $this->keyToTitle( $row->pl_title
) );
128 $this->setContinueEnumParameter( 'continue', $this->keyToTitle( $row->pl_title
) . "|" . $row->pl_from
);
133 if ( is_null( $resultPageSet ) ) {
136 $vals['fromid'] = intval( $row->pl_from
);
139 $title = Title
::makeTitle( $params['namespace'], $row->pl_title
);
140 ApiQueryBase
::addTitleInfo( $vals, $title );
142 $fit = $result->addValue( array( 'query', $this->getModuleName() ), null, $vals );
144 if ( $params['unique'] ) {
145 $this->setContinueEnumParameter( 'from', $this->keyToTitle( $row->pl_title
) );
147 $this->setContinueEnumParameter( 'continue', $this->keyToTitle( $row->pl_title
) . "|" . $row->pl_from
);
152 $pageids[] = $row->pl_from
;
156 if ( is_null( $resultPageSet ) ) {
157 $result->setIndexedTagName_internal( array( 'query', $this->getModuleName() ), 'l' );
159 $resultPageSet->populateFromPageIDs( $pageids );
163 public function getAllowedParams() {
171 ApiBase
::PARAM_ISMULTI
=> true,
172 ApiBase
::PARAM_DFLT
=> 'title',
173 ApiBase
::PARAM_TYPE
=> array(
178 'namespace' => array(
179 ApiBase
::PARAM_DFLT
=> 0,
180 ApiBase
::PARAM_TYPE
=> 'namespace'
183 ApiBase
::PARAM_DFLT
=> 10,
184 ApiBase
::PARAM_TYPE
=> 'limit',
185 ApiBase
::PARAM_MIN
=> 1,
186 ApiBase
::PARAM_MAX
=> ApiBase
::LIMIT_BIG1
,
187 ApiBase
::PARAM_MAX2
=> ApiBase
::LIMIT_BIG2
192 public function getParamDescription() {
193 $p = $this->getModulePrefix();
195 'from' => 'The page title to start enumerating from',
196 'to' => 'The page title to stop enumerating at',
197 'prefix' => 'Search for all page titles that begin with this value',
198 'unique' => "Only show unique links. Cannot be used with generator or {$p}prop=ids",
200 'What pieces of information to include',
201 " ids - Adds pageid of where the link is from (Cannot be used with {$p}unique)",
202 ' title - Adds the title of the link',
204 'namespace' => 'The namespace to enumerate',
205 'limit' => 'How many total links to return',
206 'continue' => 'When more results are available, use this to continue',
210 public function getDescription() {
211 return 'Enumerate all links that point to a given namespace';
214 public function getPossibleErrors() {
215 $m = $this->getModuleName();
216 return array_merge( parent
::getPossibleErrors(), array(
217 array( 'code' => 'params', 'info' => "{$m} cannot be used as a generator in unique links mode" ),
218 array( 'code' => 'params', 'info' => "{$m} cannot return corresponding page ids in unique links mode" ),
219 array( 'code' => 'params', 'info' => 'alcontinue and alfrom cannot be used together' ),
220 array( 'code' => 'badcontinue', 'info' => 'Invalid continue parameter' ),
224 protected function getExamples() {
226 'api.php?action=query&list=alllinks&alunique=&alfrom=B',
230 public function getVersion() {
231 return __CLASS__
. ': $Id$';