McPringle/sportchef

<!--
    SportChef – Sports Competition Management Software
    Copyright (C) 2016 Marcus Fihlon

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-->
<link rel="import" href="../../sportchef_components/sportchef-jquery/sportchef-jquery.html" />

<script>
    function i18n_findTranslation(translations, keys) {
        var key = keys.shift();
        var value = translations[key];
        if (typeof value === 'string') {
            return value;
        } else if (typeof value === 'undefined') {
            return null; // can' find translation
        }
        return i18n_findTranslation(value, keys);
    }

    $(function() {

        // detect browser language
        var browserLanguage = navigator.language || navigator.userLanguage;

        // check for supported languages
        if (browserLanguage === 'de') {

            // load translation file
            var url = 'sportchef_components/sportchef-i18n/translations.' + browserLanguage + '.json';
            $.getJSON( url, {} )
                .done(function (translations) {

                    // start translation
                    $('[data-i18n]').each(function () {
                        var element = $(this);
                        var key = element.attr('data-i18n');
                        var keys = key.split('.');
                        var translation = i18n_findTranslation(translations, keys);
                        if (translation !== null && typeof translation !== 'undefined') {
                            var attribute = element.attr('data-i18n-attribute');
                            if (attribute !== null && typeof attribute !== 'undefined') {
                                element.attr(attribute, translation);
                            } else {
                                element.html(translation);
                            }
                        } else {
                            console.log('Can not find translation of "' + key + '" for language "' + browserLanguage + '"!');
                        }
                    });
                });
        }
    });
</script>