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1<?php
2/**
3 * API for MediaWiki 1.17+
4 *
5 * Copyright © 2010 Sam Reed
6 * Copyright © 2006 Yuri Astrakhan "<Firstname><Lastname>@gmail.com"
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
21 * http://www.gnu.org/copyleft/gpl.html
22 *
23 * @file
24 */
25
26namespace MediaWiki\Api;
27
28use MediaWiki\Title\Title;
29use MediaWiki\Utils\UrlUtils;
30use Wikimedia\ParamValidator\ParamValidator;
31use Wikimedia\ParamValidator\TypeDef\IntegerDef;
32
33/**
34 * A query module to list all interwiki links on a page
35 *
36 * @ingroup API
37 */
38class ApiQueryIWLinks extends ApiQueryBase {
39
40    private UrlUtils $urlUtils;
41
42    public function __construct( ApiQuery $query, string $moduleName, UrlUtils $urlUtils ) {
43        parent::__construct( $query, $moduleName, 'iw' );
44
45        $this->urlUtils = $urlUtils;
46    }
47
48    public function execute() {
49        $pages = $this->getPageSet()->getGoodPages();
50        if ( $pages === [] ) {
51            return;
52        }
53
54        $params = $this->extractRequestParams();
55        $prop = array_fill_keys( (array)$params['prop'], true );
56
57        if ( isset( $params['title'] ) && !isset( $params['prefix'] ) ) {
58            $this->dieWithError(
59                [
60                    'apierror-invalidparammix-mustusewith',
61                    $this->encodeParamName( 'title' ),
62                    $this->encodeParamName( 'prefix' ),
63                ],
64                'invalidparammix'
65            );
66        }
67
68        // Handle deprecated param
69        $this->requireMaxOneParameter( $params, 'url', 'prop' );
70        if ( $params['url'] ) {
71            $prop = [ 'url' => 1 ];
72        }
73
74        $this->addFields( [
75            'iwl_from',
76            'iwl_prefix',
77            'iwl_title'
78        ] );
79
80        $this->addTables( 'iwlinks' );
81        $this->addWhereFld( 'iwl_from', array_keys( $pages ) );
82
83        if ( $params['continue'] !== null ) {
84            $cont = $this->parseContinueParamOrDie( $params['continue'], [ 'int', 'string', 'string' ] );
85            $op = $params['dir'] == 'descending' ? '<=' : '>=';
86            $db = $this->getDB();
87            $this->addWhere( $db->buildComparison( $op, [
88                'iwl_from' => $cont[0],
89                'iwl_prefix' => $cont[1],
90                'iwl_title' => $cont[2],
91            ] ) );
92        }
93
94        $sort = ( $params['dir'] == 'descending' ? ' DESC' : '' );
95        if ( isset( $params['prefix'] ) ) {
96            $this->addWhereFld( 'iwl_prefix', $params['prefix'] );
97            if ( isset( $params['title'] ) ) {
98                $this->addWhereFld( 'iwl_title', $params['title'] );
99                $this->addOption( 'ORDER BY', 'iwl_from' . $sort );
100            } else {
101                $this->addOption( 'ORDER BY', [
102                    'iwl_from' . $sort,
103                    'iwl_title' . $sort
104                ] );
105            }
106        } else {
107            // Don't order by iwl_from if it's constant in the WHERE clause
108            if ( count( $pages ) === 1 ) {
109                $this->addOption( 'ORDER BY', 'iwl_prefix' . $sort );
110            } else {
111                $this->addOption( 'ORDER BY', [
112                    'iwl_from' . $sort,
113                    'iwl_prefix' . $sort,
114                    'iwl_title' . $sort
115                ] );
116            }
117        }
118
119        $this->addOption( 'LIMIT', $params['limit'] + 1 );
120        $res = $this->select( __METHOD__ );
121
122        $count = 0;
123        foreach ( $res as $row ) {
124            if ( ++$count > $params['limit'] ) {
125                // We've reached the one extra which shows that
126                // there are additional pages to be had. Stop here...
127                $this->setContinueEnumParameter(
128                    'continue',
129                    "{$row->iwl_from}|{$row->iwl_prefix}|{$row->iwl_title}"
130                );
131                break;
132            }
133            $entry = [ 'prefix' => $row->iwl_prefix ];
134
135            if ( isset( $prop['url'] ) ) {
136                $title = Title::newFromText( "{$row->iwl_prefix}:{$row->iwl_title}" );
137                if ( $title ) {
138                    $entry['url'] = (string)$this->urlUtils->expand( $title->getFullURL(), PROTO_CURRENT );
139                }
140            }
141
142            ApiResult::setContentValue( $entry, 'title', $row->iwl_title );
143            $fit = $this->addPageSubItem( $row->iwl_from, $entry );
144            if ( !$fit ) {
145                $this->setContinueEnumParameter(
146                    'continue',
147                    "{$row->iwl_from}|{$row->iwl_prefix}|{$row->iwl_title}"
148                );
149                break;
150            }
151        }
152    }
153
154    public function getCacheMode( $params ) {
155        return 'public';
156    }
157
158    public function getAllowedParams() {
159        return [
160            'prop' => [
161                ParamValidator::PARAM_ISMULTI => true,
162                ParamValidator::PARAM_TYPE => [
163                    'url',
164                ],
165                ApiBase::PARAM_HELP_MSG_PER_VALUE => [],
166            ],
167            'prefix' => null,
168            'title' => null,
169            'dir' => [
170                ParamValidator::PARAM_DEFAULT => 'ascending',
171                ParamValidator::PARAM_TYPE => [
172                    'ascending',
173                    'descending'
174                ]
175            ],
176            'limit' => [
177                ParamValidator::PARAM_DEFAULT => 10,
178                ParamValidator::PARAM_TYPE => 'limit',
179                IntegerDef::PARAM_MIN => 1,
180                IntegerDef::PARAM_MAX => ApiBase::LIMIT_BIG1,
181                IntegerDef::PARAM_MAX2 => ApiBase::LIMIT_BIG2
182            ],
183            'continue' => [
184                ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
185            ],
186            'url' => [
187                ParamValidator::PARAM_DEFAULT => false,
188                ParamValidator::PARAM_DEPRECATED => true,
189            ],
190        ];
191    }
192
193    protected function getExamplesMessages() {
194        $title = Title::newMainPage()->getPrefixedText();
195        $mp = rawurlencode( $title );
196
197        return [
198            "action=query&prop=iwlinks&titles={$mp}"
199                => 'apihelp-query+iwlinks-example-simple',
200        ];
201    }
202
203    public function getHelpUrls() {
204        return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Iwlinks';
205    }
206}
207
208/** @deprecated class alias since 1.43 */
209class_alias( ApiQueryIWLinks::class, 'ApiQueryIWLinks' );