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-rw-r--r--i18n/i18n.ts179
1 files changed, 179 insertions, 0 deletions
diff --git a/i18n/i18n.ts b/i18n/i18n.ts
new file mode 100644
index 000000000..230bddd7d
--- /dev/null
+++ b/i18n/i18n.ts
@@ -0,0 +1,179 @@
+/*
+ This file is part of TALER
+ (C) 2016 GNUnet e.V.
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
+ */
+
+"use strict";
+
+document.addEventListener(
+ "DOMContentLoaded",
+ function () {
+ document.body.lang = chrome.i18n.getUILanguage();
+ });
+
+declare var i18n: any;
+
+const JedModule = window["Jed"];
+var jed;
+var i18nDebug = false;
+
+
+class PluralNumber {
+ n: number;
+
+ constructor(n) {
+ this.n = n;
+ }
+
+ valueOf () {
+ return this.n;
+ }
+
+ toString () {
+ return this.n.toString();
+ }
+}
+
+
+/** Initialize Jed */
+function init () {
+ if ("object" === typeof jed) {
+ return;
+ }
+ if ("function" !== typeof JedModule) {
+ return;
+ }
+
+ if (!(i18n.lang in i18n.strings)) {
+ i18n.lang = "en-US";
+ }
+ jed = new JedModule(i18n.strings[i18n.lang]);
+
+ if (i18nDebug) {
+ let link = m("a[href=https://demo.taler.net]", i18n`free KUDOS`);
+ let i = 1, amount = 5, currency = "EUR", date = new Date(), text = "demo.taler.net";
+ console.log(i18n`DEBUG: Your balance on ${date} is ${amount} KUDO. Get more at ${text}`);
+ console.log(i18n.parts`DEBUG: Your balance on ${date} is ${amount} KUDO. Get more at ${link}`);
+ console.log(i18n.pluralize(i18n`DEBUG: Your balance is ${amount} KUDO.`,
+ `DEBUG: Your balance is ${amount} KUDOs.`));
+ console.log(i18n.pluralize(i18n`DEBUG: #${i}: Your balance is ${i18n.number(amount)} KUDO.`,
+ `DEBUG: #${i}: Your balance is ${i18n.number(amount)} KUDOs.`));
+ }
+}
+
+
+/** Convert template strings to a msgid */
+function toI18nString(strings) {
+ let str = "";
+ for (let i = 0; i < strings.length; i++) {
+ str += strings[i];
+ if (i < strings.length - 1) {
+ str += "%"+ (i+1) +"$s";
+ }
+ }
+ return str;
+}
+
+
+/** Use the first number in values to determine plural form */
+function getPluralValue (values) {
+ let n = null;
+ for (let i = 0; i < values.length; i++) {
+ if ("number" === typeof values[i] || values[i] instanceof PluralNumber) {
+ if (null === n || values[i] instanceof PluralNumber) {
+ n = values[i].valueOf();
+ }
+ }
+ }
+ return (null === n) ? 1 : n;
+}
+
+
+var i18n = <any>function i18n(strings, ...values) {
+ init();
+ if ("object" !== typeof jed) {
+ // Fallback implementation in case i18n lib is not there
+ return String.raw(strings, ...values);
+ }
+
+ let str = toI18nString (strings);
+ let n = getPluralValue (values);
+ let tr = jed.translate(str).ifPlural(n, str).fetch(...values);
+ if (i18nDebug) {
+ console.log('i18n:', 'n: ', n, 'strings:', strings, 'values:', values);
+ console.log('i18n:', 'str:', str);
+ console.log('i18n:', 'tr:', tr);
+ }
+ return tr;
+};
+
+i18n.lang = chrome.i18n.getUILanguage();
+i18n.strings = {};
+
+
+/**
+ * Interpolate i18nized values with arbitrary objects.
+ * @return Array of strings/objects.
+ */
+i18n.parts = function(strings, ...values) {
+ init();
+ if ("object" !== typeof jed) {
+ // Fallback implementation in case i18n lib is not there
+ let parts = [];
+
+ for (let i = 0; i < strings.length; i++) {
+ parts.push(strings[i]);
+ if (i < values.length) {
+ parts.push(values[i]);
+ }
+ }
+ return parts;
+ }
+
+ let str = toI18nString (strings);
+ let n = getPluralValue (values);
+ let tr = jed.ngettext(str, str, n).split(/%(\d+)\$s/);
+ let parts = [];
+ for (let i = 0; i < tr.length; i++) {
+ if (0 == i % 2) {
+ parts.push(tr[i]);
+ } else {
+ parts.push(values[parseInt(tr[i]) - 1]);
+ }
+ }
+
+ if (i18nDebug) {
+ console.log('i18n.parts:', 'n: ', n, 'strings:', strings, 'values:', values);
+ console.log('i18n.parts:', 'str:', str);
+ console.log('i18n.parts:', 'parts:', parts);
+ }
+ return parts;
+};
+
+
+/**
+ * Pluralize based on first numeric parameter in the template.
+ * @todo The plural argument is used for extraction by pogen.js
+ */
+i18n.pluralize = function (singular, plural) {
+ return singular;
+};
+
+
+/**
+ * Return a number that is used to determine the plural form for a template.
+ */
+i18n.number = function (n : number) {
+ return new PluralNumber (n);
+}