wikimedia/mediawiki-extensions-Wikibase

<?php

use DataValues\MonolingualTextValue;
use DataValues\StringValue;
use Wikibase\DataModel\Snak\PropertyValueSnak;
use Wikibase\DataModel\Statement\Statement;
use Wikibase\Repo\Content\EntityContent;
use Wikibase\Repo\Content\ItemContent;

/**
 * Example showing how the search index behavior for Wikibase entities
 * can be controlled using the WikibaseTextForSearchIndex hook.
 *
 * If this config file is included, the search index will include
 * all string and text values present in the main snak of any
 * statement associated with an item.
 *
 * @license GPL-2.0-or-later
 * @author Daniel Kinzler
 */

if ( !defined( 'MEDIAWIKI' ) ) {
    die( 'Not an entry point.' );
}

// @phan-suppress-next-line PhanUndeclaredVariableDim
$wgHooks['WikibaseTextForSearchIndex'][] = function( EntityContent $entityContent, &$text ) {
    if ( !( $entityContent instanceof ItemContent ) ) {
        return;
    }

    $statements = $entityContent->getItem()->getStatements();

    /** @var Statement $statement */
    foreach ( $statements as $statement ) {
        $snak = $statement->getMainSnak();

        // Skip "no value" and "some value" snaks.
        if ( !( $snak instanceof PropertyValueSnak ) ) {
            continue;
        }

        $value = $snak->getDataValue();

        // If the value is text-like, give it to the indexer.
        if ( $value instanceof StringValue ) {
            $text .= $value->getValue() . "\n";
        } elseif ( $value instanceof MonolingualTextValue ) {
            $text .= $value->getText() . "\n";
        }
    }
};