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[autoinstalls/mediawiki.git] / includes / api / ApiQueryExtLinksUsage.php
1 <?php
2
3 /*
4  * Created on July 7, 2007
5  *
6  * API for MediaWiki 1.8+
7  *
8  * Copyright (C) 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
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  * @ingroup API
33  */
34 class ApiQueryExtLinksUsage extends ApiQueryGeneratorBase {
35
36         public function __construct($query, $moduleName) {
37                 parent :: __construct($query, $moduleName, 'eu');
38         }
39
40         public function execute() {
41                 $this->run();
42         }
43
44         public function executeGenerator($resultPageSet) {
45                 $this->run($resultPageSet);
46         }
47
48         private function run($resultPageSet = null) {
49
50                 $params = $this->extractRequestParams();
51
52                 $protocol = $params['protocol'];
53                 $query = $params['query'];
54
55                 // Find the right prefix
56                 global $wgUrlProtocols;
57                 if($protocol && !in_array($protocol, $wgUrlProtocols))
58                 {
59                         foreach ($wgUrlProtocols as $p) {
60                                 if( substr( $p, 0, strlen( $protocol ) ) === $protocol ) {
61                                         $protocol = $p;
62                                         break;
63                                 }
64                         }
65                 }
66                 else
67                         $protocol = null;
68
69                 $db = $this->getDB();
70                 $this->addTables(array('page','externallinks'));        // must be in this order for 'USE INDEX'
71                 $this->addOption('USE INDEX', 'el_index');
72                 $this->addWhere('page_id=el_from');
73                 $this->addWhereFld('page_namespace', $params['namespace']);
74
75                 if(!is_null($query) || $query != '')
76                 {
77                         if(is_null($protocol))
78                                 $protocol = 'http://';
79
80                         $likeQuery = LinkFilter::makeLike($query, $protocol);
81                         if (!$likeQuery)
82                                 $this->dieUsage('Invalid query', 'bad_query');
83                         $likeQuery = substr($likeQuery, 0, strpos($likeQuery,'%')+1);
84                         $this->addWhere('el_index LIKE ' . $db->addQuotes( $likeQuery ));
85                 }
86                 else if(!is_null($protocol))
87                         $this->addWhere('el_index LIKE ' . $db->addQuotes( "$protocol%" ));
88
89                 $prop = array_flip($params['prop']);
90                 $fld_ids = isset($prop['ids']);
91                 $fld_title = isset($prop['title']);
92                 $fld_url = isset($prop['url']);
93
94                 if (is_null($resultPageSet)) {
95                         $this->addFields(array (
96                                 'page_id',
97                                 'page_namespace',
98                                 'page_title'
99                         ));
100                         $this->addFieldsIf('el_to', $fld_url);
101                 } else {
102                         $this->addFields($resultPageSet->getPageTableFields());
103                 }
104
105                 $limit = $params['limit'];
106                 $offset = $params['offset'];
107                 $this->addOption('LIMIT', $limit +1);
108                 if (isset ($offset))
109                         $this->addOption('OFFSET', $offset);
110
111                 $res = $this->select(__METHOD__);
112
113                 $result = $this->getResult();
114                 $count = 0;
115                 while ($row = $db->fetchObject($res)) {
116                         if (++ $count > $limit) {
117                                 // We've reached the one extra which shows that there are additional pages to be had. Stop here...
118                                 $this->setContinueEnumParameter('offset', $offset+$limit);
119                                 break;
120                         }
121
122                         if (is_null($resultPageSet)) {
123                                 $vals = array();
124                                 if ($fld_ids)
125                                         $vals['pageid'] = intval($row->page_id);
126                                 if ($fld_title) {
127                                         $title = Title :: makeTitle($row->page_namespace, $row->page_title);
128                                         ApiQueryBase::addTitleInfo($vals, $title);
129                                 }
130                                 if ($fld_url)
131                                         $vals['url'] = $row->el_to;
132                                 $fit = $result->addValue(array('query', $this->getModuleName()), null, $vals);
133                                 if(!$fit)
134                                 {
135                                         $this->setContinueEnumParameter('offset', $offset + $count - 1);
136                                         break;
137                                 }
138                         } else {
139                                 $resultPageSet->processDbRow($row);
140                         }
141                 }
142                 $db->freeResult($res);
143
144                 if (is_null($resultPageSet)) {
145                         $result->setIndexedTagName_internal(array('query', $this->getModuleName()),
146                                         $this->getModulePrefix());
147                 }
148         }
149
150         public function getAllowedParams() {
151                 global $wgUrlProtocols;
152                 $protocols = array('');
153                 foreach ($wgUrlProtocols as $p) {
154                         $protocols[] = substr($p, 0, strpos($p,':'));
155                 }
156
157                 return array (
158                         'prop' => array (
159                                 ApiBase :: PARAM_ISMULTI => true,
160                                 ApiBase :: PARAM_DFLT => 'ids|title|url',
161                                 ApiBase :: PARAM_TYPE => array (
162                                         'ids',
163                                         'title',
164                                         'url'
165                                 )
166                         ),
167                         'offset' => array (
168                                 ApiBase :: PARAM_TYPE => 'integer'
169                         ),
170                         'protocol' => array (
171                                 ApiBase :: PARAM_TYPE => $protocols,
172                                 ApiBase :: PARAM_DFLT => '',
173                         ),
174                         'query' => null,
175                         'namespace' => array (
176                                 ApiBase :: PARAM_ISMULTI => true,
177                                 ApiBase :: PARAM_TYPE => 'namespace'
178                         ),
179                         'limit' => array (
180                                 ApiBase :: PARAM_DFLT => 10,
181                                 ApiBase :: PARAM_TYPE => 'limit',
182                                 ApiBase :: PARAM_MIN => 1,
183                                 ApiBase :: PARAM_MAX => ApiBase :: LIMIT_BIG1,
184                                 ApiBase :: PARAM_MAX2 => ApiBase :: LIMIT_BIG2
185                         )
186                 );
187         }
188
189         public function getParamDescription() {
190                 return array (
191                         'prop' => 'What pieces of information to include',
192                         'offset' => 'Used for paging. Use the value returned for "continue"',
193                         'protocol' => array(    'Protocol of the url. If empty and euquery set, the protocol is http.',
194                                                 'Leave both this and euquery empty to list all external links'),
195                         'query' => 'Search string without protocol. See [[Special:LinkSearch]]. Leave empty to list all external links',
196                         'namespace' => 'The page namespace(s) to enumerate.',
197                         'limit' => 'How many pages to return.'
198                 );
199         }
200
201         public function getDescription() {
202                 return 'Enumerate pages that contain a given URL';
203         }
204
205         protected function getExamples() {
206                 return array (
207                         'api.php?action=query&list=exturlusage&euquery=www.mediawiki.org'
208                 );
209         }
210
211         public function getVersion() {
212                 return __CLASS__ . ': $Id: ApiQueryExtLinksUsage.php 47865 2009-02-27 16:03:01Z catrope $';
213         }
214 }