105 lines
4.0 KiB
Python
105 lines
4.0 KiB
Python
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"""
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Heat pump simulation repository with database CRUD operations
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SPDX - License - Identifier: LGPL - 3.0 - or -later
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Copyright © 2022 Concordia CERC group
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Project Coder Peter Yefi peteryefi@gmail.com
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"""
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from persistence import BaseRepo, CityRepo
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from sqlalchemy.exc import SQLAlchemyError
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from sqlalchemy import select
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from persistence.models import HeatPumpSimulation
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from typing import Union, Dict
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class HeatPumpSimulationRepo(BaseRepo):
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_instance = None
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def __init__(self, db_name, app_env):
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super().__init__(db_name, app_env)
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self._city_repo = CityRepo(db_name, app_env)
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def __new__(cls, db_name, app_env):
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"""
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Implemented for a singleton pattern
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"""
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if cls._instance is None:
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cls._instance = super(HeatPumpSimulationRepo, cls).__new__(cls)
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return cls._instance
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def insert(self, hp_simulation_data: Dict, city_id: int) -> Union[HeatPumpSimulation, Dict]:
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"""
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Inserts the results of heat pump simulation
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:param hp_simulation_data: dictionary with heatpump the simulation inputs and output
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:param city_id: the city that was used in running the simulation
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:return: HeatPumpSimulation
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"""
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city = self._city_repo.get_by_id(city_id)
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if city is None:
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return {'message': 'city not found in database'}
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hp_simulation = HeatPumpSimulation()
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hp_simulation.city_id = city_id
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hp_simulation.end_year = hp_simulation_data["EndYear"]
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hp_simulation.start_year = hp_simulation_data["StartYear"]
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hp_simulation.max_demand_storage_hour = hp_simulation_data["HoursOfStorageAtMaxDemand"]
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hp_simulation.max_hp_energy_input = hp_simulation_data["MaximumHPEnergyInput"]
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hp_simulation.building_supply_temp = hp_simulation_data["BuildingSuppTemp"]
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hp_simulation.temp_difference = hp_simulation_data["TemperatureDifference"]
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hp_simulation.fuel_lhv = hp_simulation_data["FuelLHV"]
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hp_simulation.fuel_price = hp_simulation_data["FuelPrice"]
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hp_simulation.fuel_efficiency = hp_simulation_data["FuelEF"]
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hp_simulation.fuel_density = hp_simulation_data["FuelDensity"]
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hp_simulation.hp_supply_temp = hp_simulation_data["HPSupTemp"]
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hp_simulation.daily_electricity_demand = hp_simulation_data["DailyElectricityDemand"]
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hp_simulation.monthly_electricity_demand = hp_simulation_data["MonthlyElectricityDemand"]
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hp_simulation.daily_fossil_fuel_consumption = hp_simulation_data["DailyFossilFuelConsumption"]
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hp_simulation.monthly_fossil_fuel_consumption = hp_simulation_data["MonthlyFossilFuelConsumption"]
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try:
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# Persist heat pump simulation data
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self.session.add(hp_simulation)
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self.session.flush()
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self.session.commit()
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return hp_simulation
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except SQLAlchemyError as err:
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print(f'Error while saving heat pump simulation data: {err}')
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def get_by_id(self, hp_simulation_id: int) -> HeatPumpSimulation:
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"""
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Fetches heat pump simulation data
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:param hp_simulation_id: the city id
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:return: a HeatPumpSimulation
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"""
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try:
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return self.session.execute(select(HeatPumpSimulation).where(HeatPumpSimulation.id == hp_simulation_id)).first()[
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0]
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except SQLAlchemyError as err:
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print(f'Error while fetching city: {err}')
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def get_by_city(self, city_id: int) -> [HeatPumpSimulation]:
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"""
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Fetch heat pump simulation results by city
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:param city_id: the name of the building
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:return: [HeatPumpSimulation] with the provided name
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"""
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try:
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result_set = self.session.execute(select(HeatPumpSimulation).where(HeatPumpSimulation.city_id == city_id))
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return [sim_data[0] for sim_data in result_set]
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except SQLAlchemyError as err:
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print(f'Error while fetching city by name: {err}')
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def delete_hp_simulation(self, hp_simulation_id: int):
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"""
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Deletes a heat pump simulation results
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:param hp_simulation_id: the heat pump simulation results id
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:return:
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"""
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try:
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self.session.query(HeatPumpSimulation).filter(HeatPumpSimulation.id == hp_simulation_id).delete()
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self.session.commit()
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except SQLAlchemyError as err:
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print(f'Error while fetching city: {err}')
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