compass/backend/services/service.py
2024-04-24 19:57:44 -04:00

128 lines
4.8 KiB
Python

from fastapi import Depends
from ..database import db_session
from sqlalchemy.orm import Session
from sqlalchemy import func, select, and_, func, or_, exists, or_
from backend.models.service_model import Service
from backend.models.user_model import User
from backend.entities.service_entity import ServiceEntity
from backend.models.enum_for_models import ProgramTypeEnum, UserTypeEnum
from backend.services.exceptions import (
ServiceNotFoundException,
ProgramNotAssignedException,
)
class ServiceService:
def __init__(self, session: Session = Depends(db_session)):
self._session = session
def get_service_by_program(self, program: ProgramTypeEnum) -> list[Service]:
"""Service method getting services belonging to a particular program."""
query = select(ServiceEntity).filter(ServiceEntity.program == program)
entities = self._session.scalars(query)
return [entity.to_model() for entity in entities]
def get_service_by_id(self, id: int) -> Service:
"""Service method getting services by id."""
query = select(ServiceEntity).filter(ServiceEntity.id == id)
entity = self._session.scalars(query).one_or_none()
if entity is None:
raise ServiceNotFoundException(f"Service with id: {id} does not exist")
return entity.to_model()
def get_service_by_name(self, name: str) -> Service:
"""Service method getting services by id."""
query = select(ServiceEntity).filter(ServiceEntity.name == name)
entity = self._session.scalars(query).one_or_none()
if entity is None:
raise ServiceNotFoundException(f"Service with name: {name} does not exist")
return entity.to_model()
def get_service_by_user(self, subject: User):
"""Service method getting all of the services that a user has access to based on role"""
if subject.role != UserTypeEnum.VOLUNTEER:
query = select(ServiceEntity)
entities = self._session.scalars(query).all()
return [service.to_model() for service in entities]
else:
programs = subject.program
services = []
for program in programs:
query = select(ServiceEntity).filter(ServiceEntity.program == program)
entities = self._session.scalars(query).all()
for entity in entities:
services.append(entity)
return [service.to_model() for service in services]
def get_all(self, subject: User) -> list[Service]:
"""Service method retrieving all of the services in the table."""
if subject.role == UserTypeEnum.VOLUNTEER:
raise ProgramNotAssignedException(
f"User is not {UserTypeEnum.ADMIN} or {UserTypeEnum.VOLUNTEER}, cannot get all"
)
query = select(ServiceEntity)
entities = self._session.scalars(query).all()
return [service.to_model() for service in entities]
def create(self, subject: User, service: Service) -> Service:
"""Creates/adds a service to the table."""
if subject.role != UserTypeEnum.ADMIN:
raise ProgramNotAssignedException(
f"User is not {UserTypeEnum.ADMIN}, cannot create service"
)
service_entity = ServiceEntity.from_model(service)
self._session.add(service_entity)
self._session.commit()
return service_entity.to_model()
def update(self, subject: User, service: Service) -> Service:
"""Updates a service if in the table."""
if subject.role != UserTypeEnum.ADMIN:
raise ProgramNotAssignedException(
f"User is not {UserTypeEnum.ADMIN}, cannot update service"
)
service_entity = self._session.get(ServiceEntity, service.id)
if service_entity is None:
raise ServiceNotFoundException(
"The service you are searching for does not exist."
)
service_entity.name = service.name
service_entity.status = service.status
service_entity.summary = service.summary
service_entity.requirements = service.requirements
service_entity.program = service.program
self._session.commit()
return service_entity.to_model()
def delete(self, subject: User, service: Service) -> None:
"""Deletes a service from the table."""
if subject.role != UserTypeEnum.ADMIN:
raise ProgramNotAssignedException(f"User is not {UserTypeEnum.ADMIN}")
service_entity = self._session.get(ServiceEntity, service.id)
if service_entity is None:
raise ServiceNotFoundException(
"The service you are searching for does not exist."
)
self._session.delete(service_entity)
self._session.commit()