# frozen_string_literal: true require ‘mail/utilities’ require ‘mail/parser_tools’

begin

original_verbose, $VERBOSE = $VERBOSE, nil

%%{

machine date_time;
alphtype int;

# Date
action date_s { date_s = p }
action date_e { date_time.date_string = chars(data, date_s, p-1) }

# Time
action time_s { time_s = p }
action time_e { date_time.time_string = chars(data, time_s, p-1) }

# No-op actions
action comment_s {}
action comment_e {}
action phrase_s {}
action phrase_e {}
action qstr_s {}
action qstr_e {}

include rfc5322_date_time "rfc5322_date_time.rl";
main := date_time;

}%%

module Mail::Parsers

module DateTimeParser
  extend Mail::ParserTools

  DateTimeStruct = Struct.new(:date_string, :time_string, :error)

  %%write data noprefix;

  def self.parse(data)
    data = data.dup.force_encoding(Encoding::ASCII_8BIT) if data.respond_to?(:force_encoding)

    raise Mail::Field::NilParseError.new(Mail::DateTimeElement) if data.nil?

    date_time = DateTimeStruct.new([])

    # Parser state
    date_s = time_s = nil

    # 5.1 Variables Used by Ragel
    p = 0
    eof = pe = data.length
    stack = []

    %%write init;
    %%write exec;

    if p != eof || cs < %%{ write first_final; }%%
      raise Mail::Field::IncompleteParseError.new(Mail::DateTimeElement, data, p)
    end

    date_time
  end
end

end

ensure

$VERBOSE = original_verbose

end