1"use strict";
 2
 3const _ = require("lodash");
 4const glob = require("glob");
 5const path = require("path");
 6const fs = require("fs");
 7const yaml = require("yaml-js");
 8
 9class I18nLoader {
10  constructor(localesPath, pattern) {
11    this.localesPath = localesPath || '';
12    this.pattern = pattern || "**/*.yml";
13  }
14
15  fetch() {
16    let content = {};
17    _.forEach(glob.sync(this.pattern, { cwd: this.localesPath }), (file) => {
18      let translations = this.fromFile(file);
19      _.forEach(translations, (pairs, locale) => {
20        if (!content[locale]) { content[locale] = {}; }
21        _.assign(content[locale], pairs);
22      });
23    });
24    return content;
25  }
26
27  fromFile(file) {
28    let content = yaml.load(fs.readFileSync(path.join(this.localesPath, file)));
29    _.forEach(content, (data, locale) => {
30      content[locale] = I18nLoader.flatten(data);
31    });
32    return content;
33  }
34
35  static flatten(data, prefix = null) {
36    let result = [];
37    _.forEach(data, (value, key) => {
38      let prefixKey = prefix ? `${prefix}.${key}` : key;
39      if (_.isPlainObject(value)) {
40        _.assign(result, I18nLoader.flatten(value, prefixKey));
41      } else {
42        result[prefixKey] = value;
43      }
44    });
45    return result;
46  }
47}
48
49module.exports = I18nLoader;