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1<?php
2
3/**
4 * Copyright © 2006 Yuri Astrakhan "<Firstname><Lastname>@gmail.com"
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
19 * http://www.gnu.org/copyleft/gpl.html
20 *
21 * @file
22 */
23
24namespace MediaWiki\Api;
25
26use MediaWiki\ExternalLinks\LinkFilter;
27use MediaWiki\MainConfigNames;
28use MediaWiki\Parser\Parser;
29use MediaWiki\Title\Title;
30use MediaWiki\Utils\UrlUtils;
31use Wikimedia\ParamValidator\ParamValidator;
32use Wikimedia\ParamValidator\TypeDef\IntegerDef;
33use Wikimedia\Rdbms\IExpression;
34use Wikimedia\Rdbms\LikeValue;
35
36/**
37 * @ingroup API
38 */
39class ApiQueryExtLinksUsage extends ApiQueryGeneratorBase {
40
41    private UrlUtils $urlUtils;
42
43    public function __construct( ApiQuery $query, string $moduleName, UrlUtils $urlUtils ) {
44        parent::__construct( $query, $moduleName, 'eu' );
45
46        $this->urlUtils = $urlUtils;
47    }
48
49    public function execute() {
50        $this->run();
51    }
52
53    public function getCacheMode( $params ) {
54        return 'public';
55    }
56
57    public function executeGenerator( $resultPageSet ) {
58        $this->run( $resultPageSet );
59    }
60
61    /**
62     * @param ApiPageSet|null $resultPageSet
63     * @return void
64     */
65    private function run( $resultPageSet = null ) {
66        $params = $this->extractRequestParams();
67        $db = $this->getDB();
68
69        $query = $params['query'];
70        $protocol = LinkFilter::getProtocolPrefix( $params['protocol'] );
71
72        $this->addTables( [ 'externallinks', 'page' ] );
73        $this->addJoinConds( [ 'page' => [ 'JOIN', 'page_id=el_from' ] ] );
74        $fields = [ 'el_to_domain_index', 'el_to_path' ];
75
76        $miser_ns = [];
77        if ( $this->getConfig()->get( MainConfigNames::MiserMode ) ) {
78            $miser_ns = $params['namespace'] ?: [];
79        } else {
80            $this->addWhereFld( 'page_namespace', $params['namespace'] );
81        }
82        if ( $query !== null && $query !== '' ) {
83            // Normalize query to match the normalization applied for the externallinks table
84            $query = Parser::normalizeLinkUrl( $query );
85            $conds = LinkFilter::getQueryConditions( $query, [
86                'protocol' => $protocol,
87                'oneWildcard' => true,
88                'db' => $db
89            ] );
90            if ( !$conds ) {
91                $this->dieWithError( 'apierror-badquery' );
92            }
93            $this->addWhere( $conds );
94        } else {
95            if ( $protocol !== null ) {
96                $this->addWhere(
97                    $db->expr( 'el_to_domain_index', IExpression::LIKE, new LikeValue( "$protocol", $db->anyString() ) )
98                );
99            }
100        }
101        $orderBy = [ 'el_id' ];
102
103        $this->addOption( 'ORDER BY', $orderBy );
104        $this->addFields( $orderBy ); // Make sure
105
106        $prop = array_fill_keys( $params['prop'], true );
107        $fld_ids = isset( $prop['ids'] );
108        $fld_title = isset( $prop['title'] );
109        $fld_url = isset( $prop['url'] );
110
111        if ( $resultPageSet === null ) {
112            $this->addFields( [
113                'page_id',
114                'page_namespace',
115                'page_title'
116            ] );
117            foreach ( $fields as $field ) {
118                $this->addFieldsIf( $field, $fld_url );
119            }
120        } else {
121            $this->addFields( $resultPageSet->getPageTableFields() );
122        }
123
124        $limit = $params['limit'];
125        $this->addOption( 'LIMIT', $limit + 1 );
126
127        // T244254: Avoid MariaDB deciding to scan all of `page`.
128        $this->addOption( 'STRAIGHT_JOIN' );
129
130        if ( $params['continue'] !== null ) {
131            $cont = $this->parseContinueParamOrDie( $params['continue'],
132                array_fill( 0, count( $orderBy ), 'string' ) );
133            $conds = array_combine( $orderBy, array_map( 'rawurldecode', $cont ) );
134            $this->addWhere( $db->buildComparison( '>=', $conds ) );
135        }
136
137        $res = $this->select( __METHOD__ );
138
139        $result = $this->getResult();
140
141        if ( $resultPageSet === null ) {
142            $this->executeGenderCacheFromResultWrapper( $res, __METHOD__ );
143        }
144
145        $count = 0;
146        foreach ( $res as $row ) {
147            if ( ++$count > $limit ) {
148                // We've reached the one extra which shows that there are
149                // additional pages to be had. Stop here...
150                $this->setContinue( $orderBy, $row );
151                break;
152            }
153
154            if ( count( $miser_ns ) && !in_array( $row->page_namespace, $miser_ns ) ) {
155                continue;
156            }
157
158            if ( $resultPageSet === null ) {
159                $vals = [
160                    ApiResult::META_TYPE => 'assoc',
161                ];
162                if ( $fld_ids ) {
163                    $vals['pageid'] = (int)$row->page_id;
164                }
165                if ( $fld_title ) {
166                    $title = Title::makeTitle( $row->page_namespace, $row->page_title );
167                    ApiQueryBase::addTitleInfo( $vals, $title );
168                }
169                if ( $fld_url ) {
170                    $to = LinkFilter::reverseIndexes( $row->el_to_domain_index ) . $row->el_to_path;
171                    // expand protocol-relative urls
172                    if ( $params['expandurl'] ) {
173                        $to = (string)$this->urlUtils->expand( $to, PROTO_CANONICAL );
174                    }
175                    $vals['url'] = $to;
176                }
177                $fit = $result->addValue( [ 'query', $this->getModuleName() ], null, $vals );
178                if ( !$fit ) {
179                    $this->setContinue( $orderBy, $row );
180                    break;
181                }
182            } else {
183                $resultPageSet->processDbRow( $row );
184            }
185        }
186
187        if ( $resultPageSet === null ) {
188            $result->addIndexedTagName( [ 'query', $this->getModuleName() ],
189                $this->getModulePrefix() );
190        }
191    }
192
193    private function setContinue( $orderBy, $row ) {
194        $fields = [];
195        foreach ( $orderBy as $field ) {
196            $fields[] = strtr( $row->$field, [ '%' => '%25', '|' => '%7C' ] );
197        }
198        $this->setContinueEnumParameter( 'continue', implode( '|', $fields ) );
199    }
200
201    public function getAllowedParams() {
202        $ret = [
203            'prop' => [
204                ParamValidator::PARAM_ISMULTI => true,
205                ParamValidator::PARAM_DEFAULT => 'ids|title|url',
206                ParamValidator::PARAM_TYPE => [
207                    'ids',
208                    'title',
209                    'url'
210                ],
211                ApiBase::PARAM_HELP_MSG_PER_VALUE => [],
212            ],
213            'continue' => [
214                ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
215            ],
216            'protocol' => [
217                ParamValidator::PARAM_TYPE => LinkFilter::prepareProtocols(),
218                ParamValidator::PARAM_DEFAULT => '',
219            ],
220            'query' => null,
221            'namespace' => [
222                ParamValidator::PARAM_ISMULTI => true,
223                ParamValidator::PARAM_TYPE => 'namespace'
224            ],
225            'limit' => [
226                ParamValidator::PARAM_DEFAULT => 10,
227                ParamValidator::PARAM_TYPE => 'limit',
228                IntegerDef::PARAM_MIN => 1,
229                IntegerDef::PARAM_MAX => ApiBase::LIMIT_BIG1,
230                IntegerDef::PARAM_MAX2 => ApiBase::LIMIT_BIG2
231            ],
232            'expandurl' => [
233                ParamValidator::PARAM_TYPE => 'boolean',
234                ParamValidator::PARAM_DEFAULT => false,
235                ParamValidator::PARAM_DEPRECATED => true,
236            ],
237        ];
238
239        if ( $this->getConfig()->get( MainConfigNames::MiserMode ) ) {
240            $ret['namespace'][ApiBase::PARAM_HELP_MSG_APPEND] = [
241                'api-help-param-limited-in-miser-mode',
242            ];
243        }
244
245        return $ret;
246    }
247
248    protected function getExamplesMessages() {
249        return [
250            'action=query&list=exturlusage&euquery=www.mediawiki.org'
251                => 'apihelp-query+exturlusage-example-simple',
252        ];
253    }
254
255    public function getHelpUrls() {
256        return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Exturlusage';
257    }
258}
259
260/** @deprecated class alias since 1.43 */
261class_alias( ApiQueryExtLinksUsage::class, 'ApiQueryExtLinksUsage' );