module RecipeArchiveZip

# File plugins/recipe.rb, line 67
def decompress(method, data, uncomp_size, flags)
  case method
  when METHOD_STORED
    data
  when METHOD_DEFLATED
    Zlib::Inflate.inflate(data)
  else
    raise "unsupported zip compression #{method}" if flags.nonzero?

    data
  end
end

# File plugins/recipe.rb, line 32
def each_entry(path)
  return enum_for(:each_entry, path) unless block_given?

  File.open(path, "rb") do |io|
    until io.eof?
      sig = read_u32(io)
      break unless sig == LOCAL_SIG

      _ver, flags, method, _time, _date, crc, comp_size, uncomp_size, name_len, extra_len =
        io.read(26).unpack("vvvvvVVVvv")
      name = io.read(name_len).force_encoding(Encoding::BINARY)
      io.read(extra_len) if extra_len.positive?
      data = io.read(comp_size)
      body = decompress(method, data, uncomp_size, flags)
      yield(name, body, crc)
    end
  end
rescue StandardError
  nil
end

# File plugins/recipe.rb, line 61
def list_members(path)
  names = []
  each_entry(path) { |name, _body, _crc| names << name }
  names
end

# File plugins/recipe.rb, line 53
def read_member(path, member_name)
  target = member_name.to_s
  each_entry(path) do |name, body, _crc|
    return truncate(body) if name == target
  end
  nil
end

# File plugins/recipe.rb, line 86
def read_u32(io)
  io.read(4)&.unpack1("V")
end

# File plugins/recipe.rb, line 80
def truncate(body)
  return body if body.bytesize <= Recipe::MAX_FILE_BYTES

  body.byteslice(0, Recipe::MAX_FILE_BYTES)
end