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1<?php
2/**
3 * A query module to get total number of langlinks (links to corresponding foreign language pages).
4 *
5 * @copyright See AUTHORS.txt
6 * @license GPL-2.0-or-later
7 */
8
9namespace ContentTranslation\ActionApi;
10
11use ApiQueryBase;
12
13class ApiQueryLangLinksCount extends ApiQueryBase {
14    public function execute() {
15        if ( $this->getPageSet()->getGoodTitleCount() < 1 ) {
16            return;
17        }
18
19        $this->addTables( 'langlinks' );
20        $this->addFields( [
21            'll_from',
22            'll_count' => 'COUNT(*)'
23        ] );
24        $this->addWhereFld( 'll_from', array_keys( $this->getPageSet()->getGoodTitles() ) );
25        $this->addOption( 'GROUP BY', [ 'll_from' ] );
26
27        // Generated SQL query example
28        // SELECT /* ApiQueryLangLinksCount::execute  */  ll_from,COUNT(*) AS ll_count
29        // FROM `langlinks` WHERE ll_from IN ('16','22')  GROUP BY ll_from
30        $res = $this->select( __METHOD__ );
31
32        foreach ( $res as $row ) {
33            $this->getResult()->addValue(
34                [ 'query', 'pages', $row->ll_from ],
35                $this->getModuleName(),
36                (int)$row->ll_count
37            );
38        }
39    }
40
41    protected function getExamplesMessages() {
42        return [
43            'action=query&prop=langlinkscount&titles=Dog&redirects=1'
44                => 'apihelp-query+langlinkscount-example-1',
45        ];
46    }
47}