def buy_it_now(self, db: Session, db_obj: Auction, buyer_id: int):
db_obj.current_bid_amount = db_obj.bid_cap
db_obj.final_winner_id = buyer_id
db.add(db_obj)
db.commit()
db.refresh(db_obj)
self.end(db, db_obj=db_obj)
def start(self,
db: Session,
db_obj: Auction,
ending_date,
starting_date=None) -> Auction:
auction_id = db_obj.id
if starting_date:
# schedule start of auction
sched.add_job(EnglishAuction.start_auction,
'date',
run_date=starting_date,
args=[auction_id])
db_obj.starting_date = starting_date
else:
db_obj.starting_date = datetime.now()
# schedule ending
sched.add_job(EnglishAuction.end_auction,
'date',
run_date=ending_date,
args=[auction_id])
db_obj.current_bid_amount = db_obj.starting_amount
db_obj.ending_date = ending_date
db.add(db_obj)
db.commit()
db.refresh(db_obj)
auction_repo.change_state(db,
db_obj=db_obj,
state=AuctionState.ONGOING)
return db_obj
def bid(self, db: Session, db_obj: Auction, amount: float, bidder_id: int):
if not self.is_valid_bid(db_obj=db_obj, amount=amount):
raise INVALID_BID_EXCEPTION
if db_obj.state != AuctionState.ONGOING:
raise AUCTION_NOT_STARTED_EXCEPTION
# creating new bid object
new_bid = bid_repo.create(db,
obj_in=BidCreate(amount=amount,
bidder_id=bidder_id))
db_obj.bids.append(new_bid)
db_obj.last_bid_at = datetime.now()
db_obj.winning_bid_id = new_bid.id
db_obj.bid_count += 1
if db_obj.bid_cap and amount >= db_obj.bid_cap:
db_obj.current_bid_amount = db_obj.bid_cap
# db_obj.final_winner_id = bidder_id
db.add(db_obj)
db.commit()
db.refresh(db_obj)
self.end(db, db_obj=db_obj)
else:
db_obj.current_bid_amount = amount + INC_AMT
db.add(db_obj)
db.commit()
db.refresh(db_obj)
def end(self, db: Session, db_obj: Auction) -> Auction:
if db_obj.reserve and db_obj.current_bid_amount < db_obj.reserve:
# when reserve not reached
auction_repo.change_state(db,
db_obj=db_obj,
state=AuctionState.CANCLED)
else:
if db_obj.winning_bid:
# when someone bid in the auction
db_obj.final_winner_id = db_obj.winning_bid.bidder_id
db.add(db_obj)
db.commit()
db.refresh(db_obj)
auction_repo.change_state(db,
db_obj=db_obj,
state=AuctionState.ENDED)
notification_data = {
'title':
f'You have won the auction of {db_obj.product.name}',
'sender_id': db_obj.owner_id,
'reciever_id': db_obj.final_winner_id
}
notification_repo.create(db=db, obj_in=notification_data)
else:
# when no one bid in the auction
auction_repo.change_state(db,
db_obj=db_obj,
state=AuctionState.CANCLED)
return db_obj
def bid(self, db: Session, db_obj: Auction, amount: float, bidder_id: int):
if not self.is_valid_bid(db_obj=db_obj, amount=amount):
raise INVALID_BID_EXCEPTION
new_bid = bid_repo.create(db,
obj_in=BidCreate(amount=amount,
bidder_id=bidder_id))
db_obj.bids.append(new_bid)
db_obj.last_bid_at = datetime.now()
db_obj.winning_bid_id = new_bid.id
if db_obj.bid_cap and amount >= db_obj.bid_cap:
db_obj.current_bid_amount = db_obj.bid_cap
db_obj.final_winner_id = bidder_id
db.add(db_obj)
db.commit()
db.refresh(db_obj)
self.end(db, db_obj=db_obj)
else:
db_obj.current_bid_amount = amount + INC_AMT
db.add(db_obj)
db.commit()
db.refresh(db_obj)
def end(self, db: Session, db_obj: Auction) -> Auction:
if db_obj.reserve and db_obj.current_bid_amount < db_obj.reserve:
auction_repo.change_state(db,
db_obj=db_obj,
state=AuctionState.CANCLED)
else:
if db_obj.winning_bid:
db_obj.final_winner_id = db_obj.winning_bid.bidder_id
db.add(db_obj)
db.commit()
db.refresh(db_obj)
auction_repo.change_state(db,
db_obj=db_obj,
state=AuctionState.ENDED)
return db_obj