72 lines
2.3 KiB
Python
72 lines
2.3 KiB
Python
# standard imports
|
|
import logging
|
|
|
|
# third-party imports
|
|
from sqlalchemy import Column, String, Integer
|
|
from sqlalchemy.dialects.postgresql import JSON
|
|
from sqlalchemy.orm.attributes import flag_modified
|
|
|
|
# local imports
|
|
from cic_ussd.db.models.base import SessionBase
|
|
from cic_ussd.error import VersionTooLowError
|
|
|
|
logg = logging.getLogger(__name__)
|
|
|
|
|
|
class UssdSession(SessionBase):
|
|
__tablename__ = 'ussd_session'
|
|
|
|
external_session_id = Column(String, nullable=False, index=True, unique=True)
|
|
service_code = Column(String, nullable=False)
|
|
msisdn = Column(String, nullable=False)
|
|
user_input = Column(String)
|
|
state = Column(String, nullable=False)
|
|
session_data = Column(JSON)
|
|
version = Column(Integer, nullable=False)
|
|
|
|
def set_data(self, key, session, value):
|
|
if self.session_data is None:
|
|
self.session_data = {}
|
|
self.session_data[key] = value
|
|
|
|
# https://stackoverflow.com/questions/42559434/updates-to-json-field-dont-persist-to-db
|
|
flag_modified(self, "session_data")
|
|
session.add(self)
|
|
|
|
def get_data(self, key):
|
|
if self.session_data is not None:
|
|
return self.session_data.get(key)
|
|
else:
|
|
return None
|
|
|
|
def check_version(self, new_version):
|
|
if new_version <= self.version:
|
|
raise VersionTooLowError('New session version number is not greater than last saved version!')
|
|
|
|
def update(self, user_input, state, version, session):
|
|
self.check_version(version)
|
|
self.user_input = user_input
|
|
self.state = state
|
|
self.version = version
|
|
session.add(self)
|
|
|
|
@staticmethod
|
|
def have_session_for_phone(phone):
|
|
r = UssdSession.session.query(UssdSession).filter_by(msisdn=phone).first()
|
|
return r is not None
|
|
|
|
def to_json(self):
|
|
""" This function serializes the in db ussd session object to a JSON object
|
|
:return: A JSON object of a ussd session in db
|
|
:rtype: dict
|
|
"""
|
|
return {
|
|
"external_session_id": self.external_session_id,
|
|
"service_code": self.service_code,
|
|
"msisdn": self.msisdn,
|
|
"user_input": self.user_input,
|
|
"state": self.state,
|
|
"session_data": self.session_data,
|
|
"version": self.version
|
|
}
|