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

begin

original_verbose, $VERBOSE = $VERBOSE, nil

%%{

machine envelope_from;
alphtype int;

# Address
action address_s { address_s = p }
action address_e { envelope_from.address = chars(data, address_s, p-1).rstrip }

# ctime_date
action ctime_date_s { ctime_date_s = p }
action ctime_date_e { envelope_from.ctime_date = chars(data, ctime_date_s, p-1) }

# No-op actions
action angle_addr_s {}
action comment_e {}
action comment_s {}
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 phrase_s {}
action phrase_e {}
action qstr_e {}
action qstr_s {}
action date_s {}
action date_e {}
action time_s {}
action time_e {}
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 {}
action received_tokens_s {}
action received_tokens_e {}

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

}%%

module Mail::Parsers

module EnvelopeFromParser
  extend Mail::ParserTools

  EnvelopeFromStruct = Struct.new(:address, :ctime_date, :error)

  %%write data noprefix;

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

    envelope_from = EnvelopeFromStruct.new
    return envelope_from if Mail::Utilities.blank?(data)

    # Parser state
    address_s = ctime_date_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::EnvelopeFromElement, data, p)
    end

    envelope_from
  end
end

end

ensure

$VERBOSE = original_verbose

end