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# frozen_string_literal: true
module Mail::Parsers
class PhraseListsParser
def parse(s)
raise Mail::Field::ParseError.new(Mail::PhraseList, s, 'nil is invalid') if s.nil?
actions, error = Ragel.parse(:phrase_lists, s)
if error
raise Mail::Field::ParseError.new(Mail::PhraseList, s, error)
end
phrase_lists = PhraseListsStruct.new([])
phrase_s = nil
actions.each_slice(2) do |action_id, p|
action = Mail::Parsers::Ragel::ACTIONS[action_id]
case action
# Phrase
when :phrase_s then phrase_s = p
when :phrase_e
phrase_lists.phrases << s[phrase_s..(p-1)] if phrase_s
phrase_s = nil
when :comment_e, :comment_s, :qstr_s, :qstr_e then nil
else
raise Mail::Field::ParseError.new(Mail::PhraseList, s, "Failed to process unknown action: #{action}")
end
end
phrase_lists
end
end
end
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