ember-intl/app/formatters/format-message.js

Ember toolbox for internationalization.

/**
 * Copyright 2015, Yahoo! Inc.
 * Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
 */

import Ember from 'ember';
import Formatter from 'ember-intl/formatter-base';

var validKey = /[\w|.]/;

var FormatMessage = Formatter.extend({
    extractICUKeys: function (msg) {
        var length = msg.length;
        var buf    = [], out = Ember.A();
        var i      = 0;
        var char, key;

        for (; i < length; i++) {
          char = msg[i];

          if (buf.length && !validKey.test(char)) {
              buf.shift();
              key = buf.join('');

              // do not include empty strings: {}
              if (key) { out.addObject(key); }

              buf = [];
          }
          else if (
            // does not include escaped curly braces
            // and double curly braces does not mistake the first
            // as the starting point of the key {{foo}} should return `foo`
            (char === '{' && msg[i-1] !== "\\" && msg[i+1] !== '{') ||
            buf.length
          )
          {
              buf.push(char);
          }
        }

        return out;
    },

    format: function (value, hash, context) {
        var icuKeys = this.extractICUKeys(value);
        var model;

        if (icuKeys && icuKeys.length) {
            model = Ember.$.extend(Ember.getProperties(context, icuKeys), hash);
        }

        var formatOptions = {
            formats: hash.format || this.filterFormatOptions(hash)
        };

        if (hash.locales) {
            formatOptions.locales = hash.locales;
        }

        return this.intl.formatMessage(value, model, formatOptions);
    }
});

FormatMessage.reopenClass({
    formatOptions: [
        'localeMatcher', 'timeZone', 'hour12', 'formatMatcher', 'weekday',
        'era', 'year', 'month', 'day', 'hour', 'minute', 'second',
        'timeZoneName'
    ]
});

export default FormatMessage;