First implementation of i18n lib

Author: DanielBrierton

index.js

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+'use strict';
+
+var fs = require('fs');
+var path = require('path');
+var po2json = require('po2json');
+var Jed = require('jed');
+var translators = {};
+var poData = {};
+
+function I18NHelper(options) {
+  this.poFilePath = options.poFilePath;
+  this.poFileName = options.poFileName || 'messages.po';
+  this.domain = options.domain;
+  this.defaultLocale = options.defaultLocale || 'en_US';
+}
+
+I18NHelper.prototype = {
+  loadLocaleData: function (locale) {
+    if (!translators[locale] && !poData[locale]) {
+      if (!fs.existsSync(path.join(this.poFilePath, locale, this.poFileName))) {
+        locale = this.defaultLocale;
+      }
+      poData[locale] = po2json.parseFileSync(path.join(this.poFilePath, locale, this.poFileName), {
+        format: 'jed1.x',
+        domain: this.domain
+      });
+      translators[locale] = new Jed(poData[locale]);
+    }
+  },
+
+  getTranslator: function (locale) {
+    this.loadLocaleData(locale);
+    return translators[locale];
+  },
+
+  getPoData: function (locale) {
+    this.loadLocaleData(locale);
+    return poData[locale];
+  },
+
+  getClosestTranslation: function (locale, key) {
+    var translation = null;
+    if (this.translationExists(locale, key)) {
+      translation = this.getTranslator(locale).translate(key);
+    } else if (this.defaultTranslationExists(key)) {
+      translation = this.getDefaultTranslation(key);
+    }
+    return translation;
+  },
+
+  getDefaultTranslation: function (key) {
+    return this.getTranslator(this.defaultLocale).translate(key);
+  },
+
+  translationExists: function (locale, key) {
+    return !!(this.getPoData(locale) && this.getPoData(locale).locale_data[this.domain] && this.getPoData(locale).locale_data[this.domain][key]);
+  },
+
+  defaultTranslationExists: function (key) {
+    return !!this.getPoData(this.defaultLocale).locale_data[this.domain][key];
+  }
+};
+
+module.exports = I18NHelper;

package.json

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+{
+  "name": "cp-i18n-lib",
+  "version": "1.0.0",
+  "description": "A set of i18n helper functions for CoderDojo's community platform",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [
+    "i18n",
+    "coderdojo"
+  ],
+  "author": "",
+  "license": "MIT",
+  "dependencies": {
+    "jed": "^1.1.0",
+    "po2json": "^0.4.2"
+  }
+}