JS i18n (locale) libary

__resource.lua

@@ -62,6 +62,7 @@ ui_page {
 }
 
 files {
+	'locale.js',
 	'html/ui.html',
 
 	'html/css/app.css',

locale.js

@@ -0,0 +1,65 @@
+var locale = [];
+
+/**
+ * Similar to the concept of gettext, this function returns the
+ * localized string for the parsed string. The function supports
+ * wrapping.
+ *
+ * @param {string} args The string we want localized
+ * @return {string} Returns the localized string
+ *
+ */
+function _U() {
+	var args = arguments;
+	var string = args[0];
+
+	// Was a string specified?
+	if (!string) {
+		console.log('locale.js: no string was parsed');
+		return 'locale.js: no string was parsed';
+	}
+
+	// Has the locale file been set?
+	if (locale.length == 0) {
+		console.log('locale.js: no locale has been set');
+		return 'locale.js: no locale has been set';
+	}
+
+	// Does the translation exist?
+	if (!locale[string]) {
+		console.log('locale.js: translation [{0}] does not exist'.format(string));
+		return 'locale.js: translation [{0}] does not exist'.format(string);
+	}
+
+	// Do we need to format the string?
+	if (args.length == 1) {
+		return capitalize(locale[string]);
+	} else {
+		return formatString(args);
+	}
+}
+
+function formatString(args) {
+	var string = capitalize(locale[args[0]]);
+
+	for (var i = 1; i < args.length; i++) {
+		string = string.replace(/%s/, args[i]);
+	}
+
+	return string;
+}
+
+function capitalize(string) {
+	return string[0].toUpperCase() + string.slice(1);
+}
+
+// https://stackoverflow.com/a/35359503
+String.prototype.format = function () {
+	var args = arguments;
+	return this.replace(/{(\d+)}/g, function (match, number) {
+		return typeof args[number] != 'undefined'
+			? args[number]
+			: match
+			;
+	});
+};

locale.lua

@@ -2,20 +2,20 @@ Locales = {}
 
 function _(str, ...)  -- Translate string
 
-  if Locales[Config.Locale] ~= nil then
+	if Locales[Config.Locale] ~= nil then
 
-    if Locales[Config.Locale][str] ~= nil then
-      return string.format(Locales[Config.Locale][str], ...)
-    else
-      return 'Translation [' .. Config.Locale .. '][' .. str .. '] does not exist'
-    end
+		if Locales[Config.Locale][str] ~= nil then
+			return string.format(Locales[Config.Locale][str], ...)
+		else
+			return 'Translation [' .. Config.Locale .. '][' .. str .. '] does not exist'
+		end
 
-  else
-    return 'Locale [' .. Config.Locale .. '] does not exist'
-  end
+	else
+		return 'Locale [' .. Config.Locale .. '] does not exist'
+	end
 
 end
 
 function _U(str, ...) -- Translate string first char uppercase
-  return tostring(_(str, ...):gsub("^%l", string.upper))
+	return tostring(_(str, ...):gsub("^%l", string.upper))
 end