class ActiveLdap::Schema::Syntaxes::GeneralizedTime

def normalize_value(value)
  if value.is_a?(Time)
    normalized_value = value.strftime("%Y%m%d%H%M%S")
    if value.gmt?
      normalized_value + "Z"
    else
      # for timezones with non-zero minutes, such as IST which is +0530,
      # divmod(3600) will give wrong value of 1800
      offset = value.gmtoff / 60 # in minutes
      normalized_value + ("%+03d%02d" % offset.divmod(60))
    end
  else
    value
  end
end

def type_cast(value)
  return value if value.nil? or value.is_a?(Time)
  match_data = FORMAT.match(value)
  if match_data
    required_components = match_data.to_a[1, 5]
    return value if required_components.any?(&:nil?)
    year, month, day, hour, minute = required_components.collect(&:to_i)
    second = match_data[-3].to_i
    fraction = match_data[-2]
    fraction = fraction.to_f if fraction
    time_zone = match_data[-1]
    arguments = [
      value, year, month, day, hour, minute, second, fraction, time_zone,
      Time.now,
    ]
    if Time.method(:make_time).arity == 11
      arguments[2, 0] = nil
    end
    begin
      Time.send(:make_time, *arguments)
    rescue ArgumentError
      raise if year >= 1700
      out_of_range_messages = ["argument out of range",
                               "time out of range"]
      raise unless out_of_range_messages.include?($!.message)
      Time.at(0)
    rescue RangeError
      raise if year >= 1700
      raise if $!.message != "bignum too big to convert into `long'"
      Time.at(0)
    end
  else
    value
  end
end

def validate_normalized_value(value, original_value)
  match_data = FORMAT.match(value)
  if match_data
    date_data = match_data.to_a[1..-1]
    missing_components = []
    required_components = %w(year month day hour minute)
    required_components.each_with_index do |component, i|
      missing_components << component unless date_data[i]
    end
    if missing_components.empty?
      nil
    else
      params = [original_value.inspect, missing_components.join(", ")]
      _("%s has missing components: %s") % params
    end
  else
    _("%s is invalid time format") % original_value.inspect
  end
end