File functions/languages.php

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<?php

/**
 * Functies m.b.t. talen
 * 
 * @copyright 2019 SIW Internationale Vrijwilligersprojecten
 */

use SIW\Data\Language;

/**
 * Geeft array met gegevens van talen terug
 * 
 * @since     3.0.0
 *
 * @param string $index
 * @param string $context all|volunteer|project
 * @return Language[]
 */
function siw_get_languages( string $context = 'all', string $index = 'slug' ) {
    $languages = wp_cache_get( "{$context}_{$index}", 'siw_languages' );

    if ( false !== $languages ) {
        return $languages;
    }

    //Data ophalen en sorteren
    $data = siw_get_data( 'languages' );
    $data = wp_list_sort( $data, 'name' );

    //Zet index van array
    $data = array_column( $data , null, $index );

    //Creëer objecten
    $languages = array_map(
        function( $item ) {
            return new Language( $item );
        },
        $data
    );

    //Filter op context
    $languages = array_filter(
        $languages, 
        function( $language ) use ( $context ) {
            return ( 'all' == $context 
                || ( 'volunteer' == $context && $language->is_volunteer_language() )
                || ( 'project' == $context && $language->is_project_language() )
            );
        }
    );
    wp_cache_set( "{$context}_{$index}", $languages, 'siw_languages' );

    return $languages;
}

/**
 * Geeft informatie over een taal terug
 * 
 * @since     3.0.0
 *
 * @param string $language
 * @param string $index
 * @return Language
 */
function siw_get_language( string $language, string $index = 'slug' ) {
    $languages = siw_get_languages( 'all', $index );
    return $languages[ $language ] ?? false;
}

/**
 * Geeft een array met niveau's van taalvaardigheid terug
 * 
 * @since     3.0.0
 *
 * @return array
 */
function siw_get_language_skill_levels() {
    $language_skill_levels = [
        '1' => __( 'Matig', 'siw' ),
        '2' => __( 'Redelijk', 'siw' ),
        '3' => __( 'Goed', 'siw' ),
        '4' => __( 'Uitstekend', 'siw' ),
    ];
    return $language_skill_levels;
}

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