Ticket #4857: translatecode-002.php

<?php
// markoheijnen has some props for providing glotpress API examples

/**
 * Communicates with http://translate.wordpress.org/ and downloads a translation for the current locale
 *
 * @since BuddyPress (1.8)
 */
class BP_Translate {

        /**
         * Singleton instance of the BP_Translate class
         *
         * @since BuddyPress (1.8)
         * @var BP_Translate
         */
        private static $instance;

        /**
         * Return the singleton instance of the BP_Translate class
         *
         * @return BP_Translate
         * @since BuddyPress (1.8)
         */
        static public function get_instance() {
                if ( ! self::$instance )
                        self::$instance = new BP_Translate;

                return self::$instance;
        }

        /**
         * Constructor
         *
         * @since BuddyPress (1.8)
         */
        public function __construct() {
                $this->register_filters();
                $this->register_actions();

                $this->register_cron();  // Intentionally after filters + actions
        }

        /**
         * Hook into filters necessary to automate the translation process
         *
         * @since BuddyPress (1.8)
         */
        protected function register_filters() {
                add_filter( 'cron_schedules', array( __CLASS__, 'add_weekly_frequency_to_cron' ) ) ;
        }

        /**
         * Hook into actions necessary to automate the translation process
         *
         * @since BuddyPress (1.8)
         */
        protected function register_actions() {
                add_action( 'bp_translate_update_check', array( __CLASS__, 'maybe_update_translation' ) );
        }

        /**
         * Register cron task to check for language updates
         *
         * @since BuddyPress (1.8)
         */
        protected function register_cron() {
                if ( ! wp_next_scheduled( 'bp_translate_update_check' ) )
                        wp_schedule_event( time(), 'bp_weekly', 'bp_translate_update_check' );
        }

        /**
         * Adds a "weekly" frequency type to the cron system
         *
         * @param array $schedules
         * @since BuddyPress (1.8)
         */
        static public function add_weekly_frequency_to_cron( $schedules ) {
                $schedules['bp_weekly'] = array(
                        'display'  => __( 'Once Weekly', 'buddypress' ),
                        'interval' => WEEK_IN_SECONDS,
                );

                return $schedules;
        }

        /**
         * Converts WordPress' locale code to the format used by translate.wordpress.org
         *
         * @return string Locale code, e.g. "fr_FR".
         * @since BuddyPress (1.8)
         * @todo Try to get endpoint added to translate.wordpress.org to convert from get_locale() to glotpress' version.
         */
        static public function get_glotpress_locale() {
                $locale = apply_filters( 'buddypress_locale', get_locale() );
                $languages  = array(
                        'da_DK' => 'da',
                        'es_ES' => 'es',
                        'fr_FR' => 'fr',
                        'hu_HU' => 'hu',
                        'it_IT' => 'it',
                        'ko_KR' => 'ko',
                        'nb_NO' => 'nb',
                        'nl_NL' => 'nl',
                        'pt_PT' => 'pt',
                        'pt_BR' => 'pt-br',
                        'ru_RU' => 'ru',
                        'sk_SK' => 'sk',
                        'th'    => 'th',
                        'zh_TW' => 'zh-tw',
                );

                if ( isset( $languages[$locale] ) )
                        return $languages[$locale];

                return $locale;
        }

        /**
         * Find out if there's a newer translation available for this site on translate.wordpress.org
         *
         * @since BuddyPress (1.8)
         */
        static public function maybe_update_translation() {
                $locale = apply_filters( 'buddypress_locale', get_locale() );

                // BuddyPress is written in American English, so bail out early.
                if ( 'en_US' == $locale )
                        return;

                // Try to get the .mo
                $url      = sprintf( 'https://translate.wordpress.org/projects/buddypress/%1$s/%2$s/default/export-translations?format=mo', '1.6.x', self::get_glotpress_locale() );
                $tmp_file = download_url( esc_url_raw( $url ) );
                if ( is_wp_error( $tmp_file ) )
                        return;

                // Check the language folder exists
                $dir = WP_LANG_DIR . '/plugins/';
                if ( ! wp_mkdir_p( $dir ) )
                        return;

                // Move the .mo into place
                @copy( $tmp_file, sprintf( "{$dir}buddypress-%1\$s.mo", $locale ) );
                @unlink( $tmp_file );
        }
}

// Temporary function name for testing
function buddypress_translate() {

        // Bail out if we're not in wp-admin, or a site admin
        if ( ! is_admin() || ! is_super_admin() || ! apply_filters( 'bp_fetch_translations', true ) )
                return;

        BP_Translate::get_instance();

        /**
         * @todo This line is just for easy testing. This is meant to be triggered by the cron.
         */
        BP_Translate::maybe_update_translation();
}
add_action( 'bp_admin_init', 'buddypress_translate' );