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Refactor fee_strategy module of parkinglot python solution #209

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Refactor fee_strategy module of parkinglot python solution #209

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22 changes: 12 additions & 10 deletions solutions/python/parkinglot/fee_strategy.py
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Original file line number Diff line number Diff line change
@@ -1,28 +1,30 @@
from abc import ABC, abstractmethod
from parking_ticket import ParkingTicket
from vehicle_size import VehicleSize
import math

class FeeStrategy(ABC):
@abstractmethod
def calculate_fee(self, parking_ticket: ParkingTicket) -> float:
def get_hourly_rate(self, parking_ticket: ParkingTicket) -> float:
pass

def calculate_fee(self, parking_ticket: ParkingTicket) -> float:
duration = parking_ticket.get_exit_timestamp() - parking_ticket.get_entry_timestamp()
hours = max(1, math.ceil(duration / (1000 * 60 * 60)))
return hours * self.get_hourly_rate(parking_ticket)

class FlatRateFeeStrategy(FeeStrategy):
RATE_PER_HOUR = 10.0

def calculate_fee(self, parking_ticket: ParkingTicket) -> float:
duration = parking_ticket.get_exit_timestamp() - parking_ticket.get_entry_timestamp()
hours = (duration // (1000 * 60 * 60)) + 1
return hours * self.RATE_PER_HOUR
def get_hourly_rate(self, parking_ticket: ParkingTicket) -> float:
return self.RATE_PER_HOUR

class VehicleBasedFeeStrategy(FeeStrategy):
HOURLY_RATES = {
VehicleSize.SMALL: 10.0,
VehicleSize.MEDIUM: 20.0,
VehicleSize.LARGE: 30.0
VehicleSize.LARGE: 30.0,
}

def calculate_fee(self, parking_ticket: ParkingTicket) -> float:
duration = parking_ticket.get_exit_timestamp() - parking_ticket.get_entry_timestamp()
hours = (duration // (1000 * 60 * 60)) + 1
return hours * self.HOURLY_RATES[parking_ticket.get_vehicle().get_size()]
def get_hourly_rate(self, parking_ticket: ParkingTicket) -> float:
return self.HOURLY_RATES[parking_ticket.get_vehicle().get_size()]