File i18n.php

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<?php

namespace SIW;

/**
 * Functionaliteit t.b.v. meertaligheid
 * 
 * @copyright 2019 SIW Internationale Vrijwilligersprojecten
 * @since     3.0.0
 */
class i18n {

    /**
     * Init
     */
    public static function init() {
        $self = new self();
        add_filter( 'load_textdomain_mofile', [ $self, 'load_custom_translations'], 10, 2 );
        load_plugin_textdomain( 'siw', false, SIW_PLUGIN_DIR . 'languages/siw/' );
    }

    /**
     * Laad custom vertalingen voor
     * 
     * - WooCommerce
     * - Pinnacle Premium
     * - SIW plugin en thema
     * @param string $mofile
     * @param string $domain
     * @return string
     */
    public function load_custom_translations( string $mofile, string $domain ) {
        $textdomains['nl_NL'] = [ 'woocommerce', 'pinnacle' ];
        $textdomains['en_US'] = [ 'siw' ];
    
        $locale = is_admin() ? get_user_locale() : get_locale();
    
        if ( isset( $textdomains[ $locale ] ) && in_array( $domain, $textdomains[ $locale ] ) ) {
            $custom_mofile = SIW_PLUGIN_DIR . "languages/{$domain}/{$locale}.mo";
            $mofile = file_exists( $custom_mofile ) ? $custom_mofile : $mofile;
        }
        return $mofile;
    }

    /**
     * Zoekt url van vertaalde pagina op basis van id
     * @param  int $page_id
     * @return string
     */
    public static function get_translated_page_url( int $page_id ) {
        $translated_page_id = self::get_translated_page_id( $page_id );
        return get_page_link( $translated_page_id );
    }

    /**
     * Zoekt id van vertaalde pagina op basis van id
     * @param  int $page_id
     * @return int
     */
    public static function get_translated_page_id( int $page_id ) {
        return apply_filters( 'wpml_object_id', $page_id, 'page', true );
    }

    /**
     * Geeft vertaalde permalink in meegegeven taal terug
     *
     * @param string $permalink
     * @param string $language_code
     * @return string
     */
    public static function get_translated_permalink( string $permalink, string $language_code ) {
        return apply_filters( 'wpml_permalink', $permalink, $language_code );
    }

    /**
     * Geeft terug of de huidige taal gelijk is aan de standaardtaal
     *
     * @return bool
     */
    public static function is_default_language() {
        return ( apply_filters( 'wpml_current_language', NULL ) == apply_filters( 'wpml_default_language', NULL ) ); 
    }

    /**
     * Geeft code van huidige taal terug
     * 
     * @return string
     */
    public static function get_current_language() {
        return apply_filters( 'wpml_current_language', NULL );
    }

    /**
     * Geeft code van standaardtaal terug
     * 
     * @return string
     */
    public static function get_default_language() {
        return apply_filters( 'wpml_default_language', NULL );
    }

    /**
     * Geeft gegevens van actieve talen terug
     * 
     * @return array
     */
    public static function get_active_languages() {
        return apply_filters( 'wpml_active_languages', null );
    }
}

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