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# frozen_string_literal: true
module Mail::Parsers
class EnvelopeFromParser
def parse(s)
envelope_from = EnvelopeFromStruct.new
if Mail::Utilities.blank?(s)
return envelope_from
end
actions, error = Ragel.parse(:envelope_from, s)
if error
raise Mail::Field::ParseError.new(Mail::EnvelopeFromElement, s, error)
end
address_s = ctime_date_s = nil
envelope_from = EnvelopeFromStruct.new
actions.each_slice(2) do |action_id, p|
action = Mail::Parsers::Ragel::ACTIONS[action_id]
case action
# Address
when :address_s then address_s = p
when :address_e
envelope_from.address = s[address_s..(p-1)].rstrip
# ctime_date
when :ctime_date_s then ctime_date_s = p
when :ctime_date_e
envelope_from.ctime_date = s[ctime_date_s..(p-1)]
# ignored actions
when :angle_addr_s, :comment_e, :comment_s,
:domain_e, :domain_s, :local_dot_atom_e,
:local_dot_atom_pre_comment_e,
:local_dot_atom_pre_comment_s,
:local_dot_atom_s, :qstr_e, :qstr_s
nil
else
raise Mail::Field::ParseError.new(Mail::EnvelopeFromElement, s, "Failed to process unknown action: #{action}")
end
end
envelope_from
end
end
end
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