discourse/app/assets/javascripts/locales/i18n.js

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/*global I18n:true */
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// https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/indexOf
if (!Array.prototype.indexOf) {
Array.prototype.indexOf = function (searchElement, fromIndex) {
if ( this === undefined || this === null ) {
throw new TypeError( '"this" is null or not defined' );
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}
var length = this.length >>> 0; // Hack to convert object.length to a UInt32
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fromIndex = +fromIndex || 0;
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if (Math.abs(fromIndex) === Infinity) {
fromIndex = 0;
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}
if (fromIndex < 0) {
fromIndex += length;
if (fromIndex < 0) {
fromIndex = 0;
}
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}
for (;fromIndex < length; fromIndex++) {
if (this[fromIndex] === searchElement) {
return fromIndex;
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}
}
return -1;
};
}
// Instantiate the object
var I18n = I18n || {};
// Set default locale to english
I18n.defaultLocale = "en";
// Set default handling of translation fallbacks to false
I18n.fallbacks = false;
// Set default separator
I18n.defaultSeparator = ".";
// Set current locale to null
I18n.locale = null;
// Set the placeholder format. Accepts `{{placeholder}}` and `%{placeholder}`.
I18n.PLACEHOLDER = /(?:\{\{|%\{)(.*?)(?:\}\}?)/gm;
I18n.fallbackRules = {};
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I18n.noFallbacks = false;
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I18n.pluralizationRules = {
en: function(n) {
return n === 0 ? ["zero", "none", "other"] : n === 1 ? "one" : "other";
},
"zh_CN": function(n) {
return n === 0 ? ["zero", "none", "other"] : "other";
},
"zh_TW": function(n) {
return n === 0 ? ["zero", "none", "other"] : "other";
},
"ko": function(n) {
return n === 0 ? ["zero", "none", "other"] : "other";
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}
};
I18n.getFallbacks = function(locale) {
if (locale === I18n.defaultLocale) {
return [];
} else if (!I18n.fallbackRules[locale]) {
var rules = [],
components = locale.split("-");
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for (var l = 1; l < components.length; l++) {
rules.push(components.slice(0, l).join("-"));
}
rules.push(I18n.defaultLocale);
I18n.fallbackRules[locale] = rules;
}
return I18n.fallbackRules[locale];
};
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I18n.isValidNode = function(obj, node, undefined) {
return obj[node] !== null && obj[node] !== undefined;
};
I18n.lookup = function(scope, options) {
options = options || {};
var lookupInitialScope = scope,
translations = this.prepareOptions(I18n.translations),
locale = options.locale || I18n.currentLocale(),
messages = translations[locale] || {},
currentScope;
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options = this.prepareOptions(options);
if (typeof scope === "object") {
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scope = scope.join(this.defaultSeparator);
}
if (options.scope) {
scope = options.scope.toString() + this.defaultSeparator + scope;
}
scope = scope.split(this.defaultSeparator);
while (messages && scope.length > 0) {
currentScope = scope.shift();
messages = messages[currentScope];
}
if (!messages) {
if (I18n.fallbacks) {
var fallbacks = this.getFallbacks(locale);
for (var fallback = 0; fallback < fallbacks.length; fallbacks++) {
messages = I18n.lookup(lookupInitialScope, this.prepareOptions({locale: fallbacks[fallback]}, options));
if (messages) {
break;
}
}
}
if (!messages && this.isValidNode(options, "defaultValue")) {
messages = options.defaultValue;
}
}
return messages;
};
// Merge serveral hash options, checking if value is set before
// overwriting any value. The precedence is from left to right.
//
// I18n.prepareOptions({name: "John Doe"}, {name: "Mary Doe", role: "user"});
// #=> {name: "John Doe", role: "user"}
//
I18n.prepareOptions = function() {
var options = {},
opts,
count = arguments.length;
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for (var i = 0; i < count; i++) {
opts = arguments[i];
if (!opts) {
continue;
}
for (var key in opts) {
if (!this.isValidNode(options, key)) {
options[key] = opts[key];
}
}
}
return options;
};
I18n.interpolate = function(message, options) {
options = this.prepareOptions(options);
var matches = message.match(this.PLACEHOLDER),
placeholder,
value,
name;
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if (!matches) {
return message;
}
for (var i = 0; placeholder = matches[i]; i++) {
name = placeholder.replace(this.PLACEHOLDER, "$1");
value = options[name];
if (!this.isValidNode(options, name)) {
value = "[missing " + placeholder + " value]";
}
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var regex = new RegExp(placeholder.replace(/\{/gm, "\\{").replace(/\}/gm, "\\}"));
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message = message.replace(regex, value);
}
return message;
};
I18n.translate = function(scope, options) {
options = this.prepareOptions(options);
var translation = this.lookup(scope, options);
// Fallback to the default locale
if (!translation && this.currentLocale() !== this.defaultLocale && !this.noFallbacks) {
options.locale = this.defaultLocale;
translation = this.lookup(scope, options);
}
if (!translation && this.currentLocale() !== 'en' && !this.noFallbacks) {
options.locale = 'en';
translation = this.lookup(scope, options);
}
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try {
if (typeof translation === "object") {
if (typeof options.count === "number") {
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return this.pluralize(options.count, scope, options);
} else {
return translation;
}
} else {
return this.interpolate(translation, options);
}
} catch (error) {
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return this.missingTranslation(scope);
}
};
I18n.localize = function(scope, value) {
switch (scope) {
case "currency":
return this.toCurrency(value);
case "number":
scope = this.lookup("number.format");
return this.toNumber(value, scope);
case "percentage":
return this.toPercentage(value);
default:
if (scope.match(/^(date|time)/)) {
return this.toTime(scope, value);
} else {
return value.toString();
}
}
};
I18n.parseDate = function(date) {
var matches, convertedDate;
// we have a date, so just return it.
if (typeof date === "object") {
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return date;
}
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// it matches the following formats:
// yyyy-mm-dd
// yyyy-mm-dd[ T]hh:mm::ss
// yyyy-mm-dd[ T]hh:mm::ss
// yyyy-mm-dd[ T]hh:mm::ssZ
// yyyy-mm-dd[ T]hh:mm::ss+0000
//
matches = date.toString().match(/(\d{4})-(\d{2})-(\d{2})(?:[ T](\d{2}):(\d{2}):(\d{2}))?(Z|\+0000)?/);
if (matches) {
for (var i = 1; i <= 6; i++) {
matches[i] = parseInt(matches[i], 10) || 0;
}
// month starts on 0
matches[2] -= 1;
if (matches[7]) {
convertedDate = new Date(Date.UTC(matches[1], matches[2], matches[3], matches[4], matches[5], matches[6]));
} else {
convertedDate = new Date(matches[1], matches[2], matches[3], matches[4], matches[5], matches[6]);
}
} else if (typeof date === "number") {
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// UNIX timestamp
convertedDate = new Date();
convertedDate.setTime(date);
} else if (date.match(/\d+ \d+:\d+:\d+ [+-]\d+ \d+/)) {
// a valid javascript format with timezone info
convertedDate = new Date();
convertedDate.setTime(Date.parse(date));
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} else {
// an arbitrary javascript string
convertedDate = new Date();
convertedDate.setTime(Date.parse(date));
}
return convertedDate;
};
I18n.toTime = function(scope, d) {
var date = this.parseDate(d),
format = this.lookup(scope);
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if (date.toString().match(/invalid/i)) {
return date.toString();
}
if (!format) {
return date.toString();
}
return this.strftime(date, format);
};
I18n.strftime = function(date, format) {
var options = this.lookup("date");
if (!options) {
return date.toString();
}
options.meridian = options.meridian || ["AM", "PM"];
var weekDay = date.getDay(),
day = date.getDate(),
year = date.getFullYear(),
month = date.getMonth() + 1,
hour = date.getHours(),
hour12 = hour,
meridian = hour > 11 ? 1 : 0,
secs = date.getSeconds(),
mins = date.getMinutes(),
offset = date.getTimezoneOffset(),
absOffsetHours = Math.floor(Math.abs(offset / 60)),
absOffsetMinutes = Math.abs(offset) - (absOffsetHours * 60),
timezoneoffset = (offset > 0 ? "-" : "+") + (absOffsetHours.toString().length < 2 ? "0" + absOffsetHours : absOffsetHours) + (absOffsetMinutes.toString().length < 2 ? "0" + absOffsetMinutes : absOffsetMinutes);
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if (hour12 > 12) {
hour12 = hour12 - 12;
} else if (hour12 === 0) {
hour12 = 12;
}
var padding = function(n) {
var s = "0" + n.toString();
return s.substr(s.length - 2);
};
var f = format;
f = f.replace("%a", options.abbr_day_names[weekDay]);
f = f.replace("%A", options.day_names[weekDay]);
f = f.replace("%b", options.abbr_month_names[month]);
f = f.replace("%B", options.month_names[month]);
f = f.replace("%d", padding(day));
f = f.replace("%e", day);
f = f.replace("%-d", day);
f = f.replace("%H", padding(hour));
f = f.replace("%-H", hour);
f = f.replace("%I", padding(hour12));
f = f.replace("%-I", hour12);
f = f.replace("%m", padding(month));
f = f.replace("%-m", month);
f = f.replace("%M", padding(mins));
f = f.replace("%-M", mins);
f = f.replace("%p", options.meridian[meridian]);
f = f.replace("%S", padding(secs));
f = f.replace("%-S", secs);
f = f.replace("%w", weekDay);
f = f.replace("%y", padding(year));
f = f.replace("%-y", padding(year).replace(/^0+/, ""));
f = f.replace("%Y", year);
f = f.replace("%z", timezoneoffset);
return f;
};
I18n.toNumber = function(number, options) {
options = this.prepareOptions(
options,
this.lookup("number.format"),
{precision: 3, separator: ".", delimiter: ",", strip_insignificant_zeros: false}
);
var negative = number < 0,
string = Math.abs(number).toFixed(options.precision).toString(),
parts = string.split("."),
precision,
buffer = [],
formattedNumber;
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number = parts[0];
precision = parts[1];
while (number.length > 0) {
buffer.unshift(number.substr(Math.max(0, number.length - 3), 3));
number = number.substr(0, number.length -3);
}
formattedNumber = buffer.join(options.delimiter);
if (options.precision > 0) {
formattedNumber += options.separator + parts[1];
}
if (negative) {
formattedNumber = "-" + formattedNumber;
}
if (options.strip_insignificant_zeros) {
var regex = {
separator: new RegExp(options.separator.replace(/\./, "\\.") + "$"),
zeros: /0+$/
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};
formattedNumber = formattedNumber
.replace(regex.zeros, "")
.replace(regex.separator, "")
;
}
return formattedNumber;
};
I18n.toCurrency = function(number, options) {
options = this.prepareOptions(
options,
this.lookup("number.currency.format"),
this.lookup("number.format"),
{unit: "$", precision: 2, format: "%u%n", delimiter: ",", separator: "."}
);
number = this.toNumber(number, options);
number = options.format
.replace("%u", options.unit)
.replace("%n", number)
;
return number;
};
I18n.toHumanSize = function(number, options) {
var kb = 1024,
size = number,
iterations = 0,
unit,
precision;
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while (size >= kb && iterations < 4) {
size = size / kb;
iterations += 1;
}
if (iterations === 0) {
unit = this.t("number.human.storage_units.units.byte", {count: size});
precision = 0;
} else {
unit = this.t("number.human.storage_units.units." + [null, "kb", "mb", "gb", "tb"][iterations]);
precision = (size - Math.floor(size) === 0) ? 0 : 1;
}
options = this.prepareOptions(
options,
{precision: precision, format: "%n%u", delimiter: ""}
);
number = this.toNumber(size, options);
number = options.format
.replace("%u", unit)
.replace("%n", number)
;
return number;
};
I18n.toPercentage = function(number, options) {
options = this.prepareOptions(
options,
this.lookup("number.percentage.format"),
this.lookup("number.format"),
{precision: 3, separator: ".", delimiter: ""}
);
number = this.toNumber(number, options);
return number + "%";
};
I18n.pluralizer = function(locale) {
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var pluralizer = this.pluralizationRules[locale];
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if (pluralizer !== undefined) return pluralizer;
return this.pluralizationRules["en"];
};
I18n.findAndTranslateValidNode = function(keys, translation) {
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for (var i = 0; i < keys.length; i++) {
var key = keys[i];
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if (this.isValidNode(translation, key)) return translation[key];
}
return null;
};
I18n.pluralize = function(count, scope, options) {
var translation;
try { translation = this.lookup(scope, options); } catch (error) {}
if (!translation) { return this.missingTranslation(scope); }
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options = this.prepareOptions(options);
options.count = count.toString();
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var pluralizer = this.pluralizer(this.currentLocale());
var key = pluralizer(Math.abs(count));
var keys = ((typeof key === "object") && (key instanceof Array)) ? key : [key];
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var message = this.findAndTranslateValidNode(keys, translation);
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if (message == null) message = this.missingTranslation(scope, keys[0]);
return this.interpolate(message, options);
};
I18n.missingTranslation = function(scope, key) {
var message = '[' + this.currentLocale() + "." + scope;
if (key) { message += "." + key; }
return message + ']';
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};
I18n.currentLocale = function() {
return (I18n.locale || I18n.defaultLocale);
};
// shortcuts
I18n.t = I18n.translate;
I18n.l = I18n.localize;
I18n.p = I18n.pluralize;
I18n.enable_verbose_localization = function(){
var counter = 0;
var keys = {};
var t = I18n.t;
I18n.noFallbacks = true;
I18n.t = I18n.translate = function(scope, value){
var current = keys[scope];
if(!current) {
current = keys[scope] = ++counter;
var message = "Translation #" + current + ": " + scope;
if (!_.isEmpty(value)) {
message += ", parameters: " + JSON.stringify(value);
}
Em.Logger.info(message);
}
return t.apply(I18n, [scope, value]) + " (t" + current + ")";
};
};
I18n.verbose_localization_session = function(){
sessionStorage.setItem("verbose_localization", "true");
I18n.enable_verbose_localization();
return true;
}
try {
if(sessionStorage && sessionStorage.getItem("verbose_localization")) {
I18n.enable_verbose_localization();
}
} catch(e){
// we don't care really, can happen if cookies disabled
}