Adding methods to String

class String
  #
  def valid_date?()
    # Match for Date pattern
    if (/[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]/.match(self))
      true
    else
      false
    end
  end
  #
  def valid_datetime?()
    # Match for ISO 8601 pattern
    if (/[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]T[0-9][0-9]:[0-9][0-9]:[0-9][0-9][+-][0-9][0-9]:[0-9][0-9]/.match(self))
      true
    else
      false
    end
  end
  #
  def valid_datetime_nolocale?()
    # Match for not-so-much ISO 8601-ish pattern
    if (/[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]T[0-9][0-9]:[0-9][0-9]:[0-9][0-9]/.match(self))
      true
    else
      false
    end
  end
  #
  def valid_path?()
    if (/.*(?:\\|\/)(.+)$/.match(self) || (self.split(" ").size == 1 || self.split("/").size > 1 || self == "/"))
      true
    else
      false
    end
  end
  #
  def valid_jid?()
    if /^(?:([^@]*)@)??([^@\/]*)(?:\/(.*?))?$/.match(self)
      true
    else
      false
    end
  end
  #
  def camel_case?()
    # self.match(/([A-Z][a-z]+[A-Z][a-zA-Z]+)/)
    if self.match(/[A-Z]([A-Z0-9]*[a-z][a-z0-9]*[A-Z]|[a-z0-9]*[A-Z][A-Z0-9]*[a-z])[A-Za-z0-9]*/)      
      true
    else
      false
    end
  end
  #
  def split_camelcase()
    if self.camel_case?()
      self.split(/(?=[A-Z])/)
    else
      self
    end
  end
  #
end