languages.js

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/*globals vsprintf*/
elgg.provide('elgg.config.translations');

// default language - required by unit tests
elgg.config.language = 'en';

elgg.add_translation = function(lang, translations) {
    elgg.provide('elgg.config.translations.' + lang);

    elgg.extend(elgg.config.translations[lang], translations);
};

elgg.get_language = function() {
    var user = elgg.get_logged_in_user_entity();

    if (user && user.language) {
        return user.language;
    }

    return elgg.config.language;
};

elgg.echo = function(key, argv, language) {
    //elgg.echo('str', 'en')
    if (elgg.isString(argv)) {
        language = argv;
        argv = [];
    }

    //elgg.echo('str', [...], 'en')
    var translations = elgg.config.translations,
        dlang = elgg.get_language(),
        map;

    language = language || dlang;
    argv = argv || [];

    map = translations[language] || translations[dlang];
    if (map && map[key]) {
        return vsprintf(map[key], argv);
    }

    return key;
};