def decode(to_decode):
""" takes a string and parses it to construct a message class """
""" needs better methods for reinstantiating """
# verify checksum
rv = Message()
decoded_list = to_decode.split(DELIMITERS[ROOT_DELIM_INDEX])
rv.header = MessageHeader.decode(decoded_list[0])
rv.payloads = [MessagePayload.decode(x, int(rv.header.message_type))
for x in decoded_list[1].split(DELIMITERS[PAYLOAD_SEP_DELIM_INDEX])]
checksum = str(crc32(decoded_list[1]))
if checksum == decoded_list[2]:
pass
else:
raise Exception("Bad Checksum") # should be more informative
return rv
