JavaScript Translation Helper Methods

trans.js

/**
 * Translation helper methods.
 *
 * Requries lodash.
 * 
 * @author Gerardo J. Báez <g@gerardobaez.com>
 * @license MIT
 */

/**
 * Get translation from i18n array.
 *
 * @param  {String} key The translation key.
 * @param  {Object} replace The string replacements.
 * @return {String}
 */
window.trans = (key, replace = {}) => {
    let str = _.get(window.i18n.lines, key)

    if (! str) {
        return ''
    }

    for (var placeholder in replace) {
        str = str.replace(new RegExp(`:${placeholder}`, 'g'), replace[placeholder])
    }

    return str
}

/**
 * Get translation singular/plural base on count.
 *
 * @param  {String} key The translation key.
 * @param  {Number} count The count.
 * @param  {Object} replace The string replacements.
 * @return {String}
 */
window.trans_choice = (key, count = 1, replace = {}) => {
    let str = trans(key, _.merge(replace, { count }))

    if (! str) {
        return ''
    }

    return _.get(str.split('|'), count > 1 ? 1 : 0)
}