summaryrefslogtreecommitdiff
path: root/includes/api/ApiQueryExtLinksUsage.php
blob: 456e87ba91a5439c505e788f31a9bd1908154081 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
<?php
/**
 *
 *
 * Created on July 7, 2007
 *
 * Copyright © 2006 Yuri Astrakhan "<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
 */

/**
 * @ingroup API
 */
class ApiQueryExtLinksUsage extends ApiQueryGeneratorBase {

	public function __construct( $query, $moduleName ) {
		parent::__construct( $query, $moduleName, 'eu' );
	}

	public function execute() {
		$this->run();
	}

	public function getCacheMode( $params ) {
		return 'public';
	}

	public function executeGenerator( $resultPageSet ) {
		$this->run( $resultPageSet );
	}

	/**
	 * @param $resultPageSet ApiPageSet
	 * @return void
	 */
	private function run( $resultPageSet = null ) {
		$params = $this->extractRequestParams();

		$query = $params['query'];
		$protocol = self::getProtocolPrefix( $params['protocol'] );

		$this->addTables( array( 'page', 'externallinks' ) ); // must be in this order for 'USE INDEX'
		$this->addOption( 'USE INDEX', 'el_index' );
		$this->addWhere( 'page_id=el_from' );

		global $wgMiserMode;
		$miser_ns = array();
		if ( $wgMiserMode ) {
			$miser_ns = $params['namespace'];
		} else {
			$this->addWhereFld( 'page_namespace', $params['namespace'] );
		}

		$whereQuery = $this->prepareUrlQuerySearchString( $query, $protocol );

		if ( $whereQuery !== null ) {
			$this->addWhere( $whereQuery );
		}

		$prop = array_flip( $params['prop'] );
		$fld_ids = isset( $prop['ids'] );
		$fld_title = isset( $prop['title'] );
		$fld_url = isset( $prop['url'] );

		if ( is_null( $resultPageSet ) ) {
			$this->addFields( array(
				'page_id',
				'page_namespace',
				'page_title'
			) );
			$this->addFieldsIf( 'el_to', $fld_url );
		} else {
			$this->addFields( $resultPageSet->getPageTableFields() );
		}

		$limit = $params['limit'];
		$offset = $params['offset'];
		$this->addOption( 'LIMIT', $limit + 1 );
		if ( isset( $offset ) ) {
			$this->addOption( 'OFFSET', $offset );
		}

		$res = $this->select( __METHOD__ );

		$result = $this->getResult();
		$count = 0;
		foreach ( $res as $row ) {
			if ( ++ $count > $limit ) {
				// We've reached the one extra which shows that there are additional pages to be had. Stop here...
				$this->setContinueEnumParameter( 'offset', $offset + $limit );
				break;
			}

			if ( count( $miser_ns ) && !in_array( $row->page_namespace, $miser_ns ) ) {
				continue;
			}

			if ( is_null( $resultPageSet ) ) {
				$vals = array();
				if ( $fld_ids ) {
					$vals['pageid'] = intval( $row->page_id );
				}
				if ( $fld_title ) {
					$title = Title::makeTitle( $row->page_namespace, $row->page_title );
					ApiQueryBase::addTitleInfo( $vals, $title );
				}
				if ( $fld_url ) {
					$to = $row->el_to;
					// expand protocol-relative urls
					if ( $params['expandurl'] ) {
						$to = wfExpandUrl( $to, PROTO_CANONICAL );
					}
					$vals['url'] = $to;
				}
				$fit = $result->addValue( array( 'query', $this->getModuleName() ), null, $vals );
				if ( !$fit ) {
					$this->setContinueEnumParameter( 'offset', $offset + $count - 1 );
					break;
				}
			} else {
				$resultPageSet->processDbRow( $row );
			}
		}

		if ( is_null( $resultPageSet ) ) {
			$result->setIndexedTagName_internal( array( 'query', $this->getModuleName() ),
					$this->getModulePrefix() );
		}
	}

	public function getAllowedParams() {
		return array(
			'prop' => array(
				ApiBase::PARAM_ISMULTI => true,
				ApiBase::PARAM_DFLT => 'ids|title|url',
				ApiBase::PARAM_TYPE => array(
					'ids',
					'title',
					'url'
				)
			),
			'offset' => array(
				ApiBase::PARAM_TYPE => 'integer'
			),
			'protocol' => array(
				ApiBase::PARAM_TYPE => self::prepareProtocols(),
				ApiBase::PARAM_DFLT => '',
			),
			'query' => null,
			'namespace' => array(
				ApiBase::PARAM_ISMULTI => true,
				ApiBase::PARAM_TYPE => 'namespace'
			),
			'limit' => array(
				ApiBase::PARAM_DFLT => 10,
				ApiBase::PARAM_TYPE => 'limit',
				ApiBase::PARAM_MIN => 1,
				ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
				ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
			),
			'expandurl' => false,
		);
	}

	public static function prepareProtocols() {
		global $wgUrlProtocols;
		$protocols = array( '' );
		foreach ( $wgUrlProtocols as $p ) {
			if ( $p !== '//' ) {
				$protocols[] = substr( $p, 0, strpos( $p, ':' ) );
			}
		}
		return $protocols;
	}

	public static function getProtocolPrefix( $protocol ) {
		// Find the right prefix
		global $wgUrlProtocols;
		if ( $protocol && !in_array( $protocol, $wgUrlProtocols ) ) {
			foreach ( $wgUrlProtocols as $p ) {
				if ( substr( $p, 0, strlen( $protocol ) ) === $protocol ) {
					$protocol = $p;
					break;
				}
			}

			return $protocol;
		} else {
			return null;
		}
	}

	public function getParamDescription() {
		global $wgMiserMode;
		$p = $this->getModulePrefix();
		$desc = array(
			'prop' => array(
				'What pieces of information to include',
				' ids    - Adds the ID of page',
				' title  - Adds the title and namespace ID of the page',
				' url    - Adds the URL used in the page',
			),
			'offset' => 'Used for paging. Use the value returned for "continue"',
			'protocol' => array(
				"Protocol of the URL. If empty and {$p}query set, the protocol is http.",
				"Leave both this and {$p}query empty to list all external links"
			),
			'query' => 'Search string without protocol. See [[Special:LinkSearch]]. Leave empty to list all external links',
			'namespace' => 'The page namespace(s) to enumerate.',
			'limit' => 'How many pages to return.',
			'expandurl' => 'Expand protocol-relative URLs with the canonical protocol',
		);

		if ( $wgMiserMode ) {
			$desc['namespace'] = array(
				$desc['namespace'],
				"NOTE: Due to \$wgMiserMode, using this may result in fewer than \"{$p}limit\" results",
				'returned before continuing; in extreme cases, zero results may be returned',
			);
		}

		return $desc;
	}

	public function getResultProperties() {
		return array(
			'ids' => array(
				'pageid' => 'integer'
			),
			'title' => array(
				'ns' => 'namespace',
				'title' => 'string'
			),
			'url' => array(
				'url' => 'string'
			)
		);
	}

	public function getDescription() {
		return 'Enumerate pages that contain a given URL';
	}

	public function getPossibleErrors() {
		return array_merge( parent::getPossibleErrors(), array(
			array( 'code' => 'bad_query', 'info' => 'Invalid query' ),
		) );
	}

	public function getExamples() {
		return array(
			'api.php?action=query&list=exturlusage&euquery=www.mediawiki.org'
		);
	}

	public function getHelpUrls() {
		return 'https://www.mediawiki.org/wiki/API:Exturlusage';
	}
}