cic-stack/apps/cic-ussd/cic_ussd/tasks/processor.py
2021-10-20 15:02:36 +00:00

87 lines
3.2 KiB
Python

# standard imports
import json
import logging
# external imports
import celery
import i18n
from cic_types.condiments import MetadataPointer
# local imports
from cic_ussd.account.metadata import get_cached_preferred_language
from cic_ussd.account.statement import get_cached_statement
from cic_ussd.account.transaction import aux_transaction_data, validate_transaction_account
from cic_ussd.cache import cache_data, cache_data_key
from cic_ussd.db.models.account import Account
from cic_ussd.db.models.base import SessionBase
celery_app = celery.current_app
logg = logging.getLogger(__file__)
@celery_app.task(bind=True)
def generate_statement(self, querying_party: str, transaction: dict):
""""""
queue = self.request.delivery_info.get('routing_key')
s_parse_transaction = celery.signature(
'cic_ussd.tasks.processor.parse_transaction', [transaction], queue=queue
)
s_cache_statement = celery.signature(
'cic_ussd.tasks.processor.cache_statement', [querying_party], queue=queue
)
celery.chain(s_parse_transaction, s_cache_statement).apply_async()
@celery_app.task
def cache_statement(parsed_transaction: dict, querying_party: str):
"""
:param parsed_transaction:
:type parsed_transaction:
:param querying_party:
:type querying_party:
:return:
:rtype:
"""
cached_statement = get_cached_statement(querying_party)
statement_transactions = []
if cached_statement:
statement_transactions = json.loads(cached_statement)
statement_transactions.append(parsed_transaction)
data = json.dumps(statement_transactions)
identifier = bytes.fromhex(querying_party)
key = cache_data_key(identifier, MetadataPointer.STATEMENT)
cache_data(key, data)
@celery_app.task
def parse_transaction(transaction: dict) -> dict:
"""This function parses transaction objects and collates all relevant data for system use i.e:
- An account's set preferred language.
- Account identifier that facilitates notification.
- Contextual tags i.e action and direction tags.
:param transaction: Transaction object.
:type transaction: dict
:return: Transaction object with contextual data for use in the system.
:rtype: dict
"""
preferred_language = get_cached_preferred_language(transaction.get('blockchain_address'))
if not preferred_language:
preferred_language = i18n.config.get('fallback')
transaction['preferred_language'] = preferred_language
transaction = aux_transaction_data(preferred_language, transaction)
session = SessionBase.create_session()
role = transaction.get('role')
alt_blockchain_address = transaction.get('alt_blockchain_address')
blockchain_address = transaction.get('blockchain_address')
account = validate_transaction_account(blockchain_address, role, session)
alt_account = session.query(Account).filter_by(blockchain_address=alt_blockchain_address).first()
if alt_account:
transaction['alt_metadata_id'] = alt_account.standard_metadata_id()
else:
transaction['alt_metadata_id'] = 'GRASSROOTS ECONOMICS'
transaction['metadata_id'] = account.standard_metadata_id()
transaction['phone_number'] = account.phone_number
session.close()
return transaction