Localize.swift

public class Localize: NSObject {
  /**
   List available languages
   - Returns: Array of available languages.
   */
  public class func availableLanguages() -> [String] {
    return NSBundle.mainBundle().localizations
  }

  /**
   Current language
   - Returns: The current language. String.
   */
  public class func currentLanguage() -> String {
    if let currentLanguage = NSUserDefaults.standardUserDefaults().objectForKey(LCLCurrentLanguageKey) as? String {
      return currentLanguage
    }
    return defaultLanguage()
  }

  /**
   Change the current language
   - Parameter language: Desired language.
   */
  public class func setCurrentLanguage(language: String) {
    let selectedLanguage = availableLanguages().contains(language) ? language : defaultLanguage()
    if (selectedLanguage != currentLanguage()){
      NSUserDefaults.standardUserDefaults().setObject(selectedLanguage, forKey: LCLCurrentLanguageKey)
      NSUserDefaults.standardUserDefaults().synchronize()
      NSNotificationCenter.defaultCenter().postNotificationName(LCLLanguageChangeNotification, object: nil)
    }
  }
}