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

begin

original_verbose, $VERBOSE = $VERBOSE, nil

%%{

machine date_time;
alphtype int;

# Received Tokens
action received_tokens_s { received_tokens_s = p }
action received_tokens_e { received.info = chars(data, received_tokens_s, p-1) }

# Date
action date_s { date_s = p }
action date_e { received.date = chars(data, date_s, p-1).strip }

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

# No-op actions
action address_s {}
action address_e {}
action angle_addr_s {}
action ctime_date_s {}
action ctime_date_e {}
action comment_e {}
action comment_s {}
action phrase_s {}
action phrase_e {}
action domain_e {}
action domain_s {}
action local_dot_atom_e {}
action local_dot_atom_pre_comment_e {}
action local_dot_atom_pre_comment_s {}
action local_dot_atom_s {}
action qstr_e {}
action qstr_s {}
action local_quoted_string_s {}
action local_quoted_string_e {}
action obs_domain_list_s {}
action obs_domain_list_e {}
action group_name_s {}
action group_name_e {}
action msg_id_s {}
action msg_id_e {}

include rfc5322 "rfc5322.rl";
main := received;

}%%

module Mail::Parsers

module ReceivedParser
  extend Mail::ParserTools

  ReceivedStruct = Struct.new(:date, :time, :info, :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::ReceivedElement) if data.nil?

    # Parser state
    received = ReceivedStruct.new
    received_tokens_s = 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::ReceivedElement, data, p)
    end

    received
  end
end

end

ensure

$VERBOSE = original_verbose

end