def create(cls, uid, value, check_sum=None, processes=list()):
"""
Creates, processes and returns a record
:param uid: str
:param value: str
:param check_sum: str
:param processes: list
:return: object
"""
record = dict()
record['uid'] = uid
record['value'] = value
record['timestamp'] = time.time()
if not check_sum:
check_sum = Helpers.sign(value)
record['check_sum'] = check_sum
for process in processes:
process.process(record)
record['size'] = Helpers.iterable_size(target=record)
return record
def update(self, uid, values):
"""
Updates a record. Raises an exception if record exists
:param uid: str
:param values: dict
:return: dict
"""
text = values['value']
self._valid_exists(uid=uid)
last_check_sum = self.get_check_sum(uid=uid)
new_check_sum = Helpers.sign(text)
if last_check_sum == new_check_sum:
raise RecordExists('Record has no change')
record = self.create(uid=uid,
value=text,
check_sum=new_check_sum,
processes=self._processes)
self._storage.update(record=record)
return record
