def get(self):
"""
Payment API
**argument**:
- `order_id`: `int`
**return**:
`Purchase succeeded` or `Purchase failed` or `Already paid`
"""
session = DBSession()
try:
order_id = request.args.get('order_id')
current_order: Order = session.query(Order).filter(
Order.order_id == order_id).first()
if current_order.order_status == "paid":
return "Already paid"
current_order.order_status = "paid"
session.commit()
session.flush()
current_ticket: Ticket = session.query(Ticket).filter(
Ticket.ticket_id == current_order.ticket_id).first()
current_ticket.available = True
session.commit()
session.flush()
return "Purchase succeeded"
except:
session.rollback()
return "Purchase failed"
finally:
session.close()
dep_t = time(int(interval_info[2][0:2]), int(interval_info[2][3:5]))
arv_t = time(int(interval_info[4][0:2]), int(interval_info[4][3:5]))
info = {
"train_id": train.train_id,
"dep_station": dep_s.station_id,
"arv_station": arv_s.station_id,
"dep_datetime": dep_t,
"arv_datetime": arv_t
}
new_interval = Interval(**info)
session.add(new_interval)
session.commit()
session.flush()
interval_id = new_interval.interval_id
interval_id_list.append(interval_id)
# Add Price
seat_type_id = 1
for price in interval_info[6:]:
if price != '-':
price_obj = Price(interval_id=interval_id, seat_type_id=seat_type_id, price=float(price))
session.add(price_obj)
session.commit()
seat_type_id += 1
for inv_i, interval_id in enumerate(interval_id_list):
interval = session.query(Interval).filter(Interval.interval_id == interval_id).first()
interval.next_id = interval_id_list[inv_i + 1] if inv_i < len(interval_id_list) - 1 else None
def delete(self):
"""
Ticket refund API, **JWT required**
**return**: A JSON dictionary with values:
- `code`: `int`, equals to 0 if deletion is successful
- `result`: `str`, shown if `code == 0`
- `error`: `str`, shown if `code != 0`
"""
session = DBSession()
try:
user_id = get_jwt_identity()
body = request.get_json()
order_id = body.get('order_id')
# The delete function is to set the order status "cancelled", set ticket available false,
# and released the occupied seat.
current_order: Order = session.query(Order).filter(
Order.order_id == order_id).first()
# print(current_order.user_id, user_id)
if int(user_id) != int(current_order.user_id):
return jsonify(code=100, error='非法退票操作！')
current_order.order_status = "cancelled"
session.commit()
session.flush()
current_ticket: Ticket = session.query(Ticket).filter(
Ticket.ticket_id == current_order.ticket_id).first()
current_ticket.available = False
session.commit()
session.flush()
first_interval = current_ticket.first_interval
last_interval = current_ticket.last_interval
current_seat: Seat = session.query(Seat).filter(
Seat.seat_id == current_ticket.seat_id).first()
train_id = session.query(Train.train_id).join(
Interval, Interval.train_id == Train.train_id).filter(
Interval.interval_id == first_interval,
Interval.available == True,
Train.available == True).first()
# Here to release the seat
train_name = session.query(Train.train_name).filter(
Train.train_id == train_id,
Train.available == True).first().train_name
interval_list = get_interval_list(train_name, session)
# successive_train_rec = get_interval_list(train_name, session)
# interval_list = session.query(successive_train_rec.c.interval_id) \
# .order_by(successive_train_rec.c.interval_id) \
# .all()
first_index = session.query(interval_list.c.interval_no) \
.filter(interval_list.c.interval_id == first_interval) \
.first() \
.interval_no
last_index = session.query(interval_list.c.interval_no) \
.filter(interval_list.c.interval_id == last_interval) \
.first() \
.interval_no
current_seat.occupied = bin(
int(current_seat.occupied, 2)
& int('0' * (last_index - first_index + 1), 2) <<
(40 - last_index))[2:].zfill(40)
session.commit()
session.flush()
return jsonify(code=0, result="操作成功，票已失效")
except:
session.rollback()
return jsonify(code=10, error='操作失败，请联系管理员')
finally:
session.close()
def post(self):
"""
Train line creation API, **JWT required**
The body should be a JSON dictionary including the following attribute(s):
- `train_name`: `str`
- `line`: `list` of dictionaries containing:
- `dep_station`: `str`
- `arv_station`: `str`
- `dep_time`: `str`
- `arv_time`: `str`
- `price`: `dict` containing at least one of:
- `seat_type_1`, `str`
- `seat_type_2`, `str`
- `seat_type_3`, `str`
- `seat_type_4`, `str`
- `seat_type_5`, `str`
- `seat_type_6`, `str`
- `seat_type_7`, `str`
**return**: A JSON dictionary with values:
- `code`: `int`, equals to 0 if creation is successful
- `error`: `str`, shown if `code != 0`
- `result`: `str`, shown if `code == 0`
"""
session = DBSession()
try:
body = request.get_json()
train_name = body.get('train_name')
if not train_name:
return jsonify(code=11, error='火车名为空')
train: Train = session.query(Train).filter(
Train.train_name == train_name).first()
if train:
return jsonify(code=11, error='火车名已存在！')
new_train = Train(train_name=train_name)
session.add(new_train)
session.commit()
session.flush()
train_id = new_train.train_id
interval_id_list = []
interval_list = body.get('line')
seat_type_list = []
for interval_info in interval_list:
dep_station = session.query(Station.station_id) \
.filter(Station.station_name == interval_info['dep_station'], Station.available == True) \
.first() \
.station_id
arv_station = session.query(Station.station_id) \
.filter(Station.station_name == interval_info['arv_station'], Station.available == True) \
.first() \
.station_id
dep_datetime = None
arv_datetime = None
if 'dep_time' in interval_info.keys(
) and interval_info['dep_time']:
dep_datetime = time(
*list(map(int, interval_info['dep_time'].split(':'))))
if 'arv_time' in interval_info.keys(
) and interval_info['arv_time']:
arv_datetime = time(
*list(map(int, interval_info['arv_time'].split(':'))))
new_interval = Interval(train_id=train_id,
dep_station=dep_station,
arv_station=arv_station,
dep_datetime=dep_datetime,
arv_datetime=arv_datetime)
session.add(new_interval)
session.commit()
session.flush()
interval_id = new_interval.interval_id
interval_id_list.append(interval_id)
price_dict = interval_info['price']
for k, v in price_dict.items():
seat_type_id = int(k[-1])
if seat_type_id not in seat_type_list:
seat_type_list.append(seat_type_id)
if not v:
continue
seat_price = max(0.01, abs(float(v)))
new_price = Price(interval_id=interval_id,
seat_type_id=seat_type_id,
price=seat_price)
session.add(new_price)
session.commit()
session.execute(func.add_seats(seat_type_list, train_id))
for index, interval_id in enumerate(interval_id_list):
interval = session.query(Interval).filter(
Interval.interval_id == interval_id).first()
interval.next_id = interval_id_list[
index + 1] if index < len(interval_id_list) - 1 else None
interval.prev_id = interval_id_list[index -
1] if index > 0 else None
session.commit()
return jsonify(code=0, result='线路添加成功')
except:
traceback.print_exc()
session.rollback()
return jsonify(code=12, error='添加失败，请检查输入是否合法')
finally:
session.close()
def post(self):
"""
Train order API, **JWT required**
**return**: A JSON dictionary with values:
- `code`: `int`, equals to 0 if order is successful
- `result`: `dict` with values, shown if `code == 0`:
- `order_id`: `int`
- `error`: `str`, shown if `code != 0`
"""
session = DBSession()
try:
user_id = get_jwt_identity()
body = request.get_json()
first_interval = int(body.get('first_interval'))
last_interval = int(body.get('last_interval'))
seat_class = body.get('seat_class')
train_name = body.get('train_name')
# successive_train_rec = get_interval_list(train_name, session)
interval_list = get_interval_list(train_name, session)
# interval_list = session.query(successive_train_rec.c.interval_id) \
# .order_by(successive_train_rec.c.interval_id) \
# .all()
first_index = session.query(interval_list.c.interval_no) \
.filter(interval_list.c.interval_id == first_interval) \
.first() \
.interval_no
last_index = session.query(interval_list.c.interval_no) \
.filter(interval_list.c.interval_id == last_interval) \
.first() \
.interval_no
seat = session.query(Seat) \
.join(Train, Train.train_id == Seat.train_id) \
.filter(Train.train_name == train_name,
Seat.seat_type_id == seat_class,
func.cast(func.substring(Seat.occupied, first_index, last_index - first_index + 1),
BIGINT) == 0) \
.first()
if seat is None:
return jsonify(code=404, error='当前区间无余票！')
seat.occupied = bin(
int(seat.occupied, 2)
| int('1' * (last_index - first_index + 1), 2) <<
(40 - last_index))[2:].zfill(40)
new_ticket = Ticket(first_interval=first_interval,
last_interval=last_interval,
seat_id=seat.seat_id,
available=False)
session.add(new_ticket)
session.commit()
session.flush()
price = session.query(func.sum(Price.price).label('price')) \
.join(interval_list, Price.interval_id == interval_list.c.interval_id) \
.filter(Price.seat_type_id == seat_class, interval_list.c.interval_no <= last_index,
interval_list.c.interval_no >= first_index) \
.first()
new_order = Order(order_status='unpaid',
user_id=user_id,
ticket_id=new_ticket.ticket_id,
price=price)
session.add(new_order)
session.commit()
session.flush()
return jsonify(code=0, result={'order_id': new_order.order_id})
except:
session.rollback()
return jsonify(code=10, error='订票失败')
finally:
session.close()
