Transform JS Date String to NSDate or localizedString | supports JavaScript/ECMAScript Date Time String Format (simplification of the ISO 8601)

JSDateForDateFormatter.swift

//
//  NSDateFormatter extension
//  Transform JS Date String to NSDate or localizedString
//
//  Created by Felix Leupold on 16.12.15 © 2015 XIEL development.
//  License: WTFPL / MIT
//
//  Usage Examples:
//  NSDateFormatter.dateFromJsDateString("2015-11-22T16:09:19.000Z");
//  NSDateFormatter.localizedStringFromJsDateString("2015-11-22T16:09:19.000Z");
//  NSDateFormatter.localizedStringFromJsDateString("2015-11-22T16:09:19.000Z", dateStyle: .ShortStyle, timeStyle: .ShortStyle)

import Foundation

extension NSDateFormatter {
    static func dateFromJsDateString(jsDateString: String) -> NSDate? {
        let dateFormatter = NSDateFormatter()
        dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"

        if let date = dateFormatter.dateFromString(jsDateString) {
            return date
        }

        return nil
    }
    static func localizedStringFromJsDateString(jsDateString: String) -> String? {
        return NSDateFormatter.localizedStringFromJsDateString(jsDateString, dateStyle: .ShortStyle, timeStyle: .NoStyle)
    }
    static func localizedStringFromJsDateString(jsDateString: String, dateStyle: NSDateFormatterStyle, timeStyle: NSDateFormatterStyle) -> String? {
        if let date = NSDateFormatter.dateFromJsDateString(jsDateString) {
            let dateFormatted = NSDateFormatter.localizedStringFromDate(date, dateStyle: dateStyle, timeStyle: timeStyle)
            return dateFormatted
        }

        return nil
    }
}