184 lines
7.8 KiB
Python
184 lines
7.8 KiB
Python
from __future__ import annotations
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from typing import TYPE_CHECKING, Any
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from sqlalchemy import func, or_, select
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from app.features.core.deps import get_session
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from app.features.core.schemas import CEFeature, ConfigEvent
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from app.features.tasks.definitions.migration import Migration
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from app.features.tasks.definitions.models import TaskDefinitionModel
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from app.library.Events import Event, EventBus, Events
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from app.library.log import get_logger
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from app.library.Services import Services
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from app.library.Singleton import Singleton
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if TYPE_CHECKING:
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from collections.abc import AsyncGenerator
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from sqlalchemy.engine.result import Result
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from sqlalchemy.ext.asyncio import AsyncSession
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from sqlalchemy.sql.elements import ColumnElement
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from sqlalchemy.sql.selectable import Select
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LOG = get_logger()
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class TaskDefinitionsRepository(metaclass=Singleton):
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def __init__(self, session: AsyncGenerator[AsyncSession] | None = None) -> None:
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self._migrated = False
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self.session: AsyncGenerator[AsyncSession] = session or get_session
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async def run_migrations(self) -> None:
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if self._migrated:
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return
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self._migrated = True
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await Migration(repo=self).run()
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@staticmethod
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def get_instance() -> TaskDefinitionsRepository:
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return TaskDefinitionsRepository()
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def attach(self, _: Any) -> None:
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async def handle_event(_, __):
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await self.run_migrations()
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async def handler(e: Event, __):
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from app.features.tasks.definitions.handlers.generic import GenericTaskHandler
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if isinstance(e.data, ConfigEvent) and CEFeature.TASKS_DEFINITIONS == e.data.feature:
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LOG.debug("Refreshing task definitions due to configuration update.")
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await GenericTaskHandler.refresh_definitions(force=True)
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Services.get_instance().add(__class__.__name__, self)
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EventBus.get_instance().subscribe(
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Events.STARTED, handle_event, f"{__class__.__name__}.run_migrations"
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).subscribe(Events.CONFIG_UPDATE, handler, "GenericTaskHandler.refresh_definitions")
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async def list(self) -> list[TaskDefinitionModel]:
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async with self.session() as session:
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result: Result[tuple[TaskDefinitionModel]] = await session.execute(
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select(TaskDefinitionModel).order_by(TaskDefinitionModel.priority.asc(), TaskDefinitionModel.name.asc())
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)
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return list(result.scalars().all())
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async def list_paginated(self, page: int, per_page: int) -> tuple[list[TaskDefinitionModel], int, int, int]:
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async with self.session() as session:
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total: int = await self.count()
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total_pages: int = (total + per_page - 1) // per_page if total > 0 else 1
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if page > total_pages and total > 0:
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page = total_pages
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query: Select[tuple[TaskDefinitionModel]] = (
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select(TaskDefinitionModel)
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.order_by(TaskDefinitionModel.priority.asc(), TaskDefinitionModel.name.asc())
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.limit(per_page)
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.offset((page - 1) * per_page)
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)
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result: Result[tuple[TaskDefinitionModel]] = await session.execute(query)
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return list(result.scalars().all()), total, page, total_pages
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async def count(self) -> int:
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async with self.session() as session:
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result: Result[tuple[int]] = await session.execute(select(func.count()).select_from(TaskDefinitionModel))
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return int(result.scalar_one())
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async def get(self, identifier: int | str) -> TaskDefinitionModel | None:
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async with self.session() as session:
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if not identifier:
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return None
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if isinstance(identifier, int):
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clause: ColumnElement[bool] = TaskDefinitionModel.id == identifier
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elif isinstance(identifier, str) and identifier.isdigit():
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clause = or_(TaskDefinitionModel.id == int(identifier), TaskDefinitionModel.name == identifier)
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else:
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clause = TaskDefinitionModel.name == identifier
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result: Result[tuple[TaskDefinitionModel]] = await session.execute(
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select(TaskDefinitionModel).where(clause).limit(1)
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)
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return result.scalar_one_or_none()
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async def get_by_name(self, name: str, exclude_id: int | None = None) -> TaskDefinitionModel | None:
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async with self.session() as session:
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query: Select[tuple[TaskDefinitionModel]] = select(TaskDefinitionModel).where(
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TaskDefinitionModel.name == name
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)
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if exclude_id is not None:
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query = query.where(TaskDefinitionModel.id != exclude_id)
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result: Result[tuple[TaskDefinitionModel]] = await session.execute(query.limit(1))
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return result.scalar_one_or_none()
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async def create(self, payload: dict[str, Any]) -> TaskDefinitionModel:
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async with self.session() as session:
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model: TaskDefinitionModel = TaskDefinitionModel(**payload) if isinstance(payload, dict) else payload
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if model.id is not None:
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model.id = None
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if await self.get_by_name(name=model.name) is not None:
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msg: str = f"Task definition with name '{model.name}' already exists."
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raise ValueError(msg)
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session.add(model)
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await session.commit()
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await session.refresh(model)
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return model
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async def update(self, identifier: int | str, payload: dict[str, Any]) -> TaskDefinitionModel:
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async with self.session() as session:
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if isinstance(identifier, int):
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clause: ColumnElement[bool] = TaskDefinitionModel.id == identifier
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elif isinstance(identifier, str) and identifier.isdigit():
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clause = or_(TaskDefinitionModel.id == int(identifier), TaskDefinitionModel.name == identifier)
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else:
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clause = TaskDefinitionModel.name == identifier
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result: Result[tuple[TaskDefinitionModel]] = await session.execute(
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select(TaskDefinitionModel).where(clause).limit(1)
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)
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model: TaskDefinitionModel | None = result.scalar_one_or_none()
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if not model:
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msg: str = f"Task definition '{identifier}' not found."
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raise KeyError(msg)
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payload.pop("id", None)
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payload.pop("created_at", None)
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payload.pop("updated_at", None)
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if "name" in payload and await self.get_by_name(name=payload["name"], exclude_id=model.id) is not None:
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msg = f"Task definition with name '{payload['name']}' already exists."
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raise ValueError(msg)
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for key, value in payload.items():
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if hasattr(model, key):
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setattr(model, key, value)
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await session.commit()
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await session.refresh(model)
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return model
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async def delete(self, identifier: int | str) -> TaskDefinitionModel:
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async with self.session() as session:
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if isinstance(identifier, int):
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clause: ColumnElement[bool] = TaskDefinitionModel.id == identifier
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elif isinstance(identifier, str) and identifier.isdigit():
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clause = or_(TaskDefinitionModel.id == int(identifier), TaskDefinitionModel.name == identifier)
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else:
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clause = TaskDefinitionModel.name == identifier
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result: Result[tuple[TaskDefinitionModel]] = await session.execute(
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select(TaskDefinitionModel).where(clause).limit(1)
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)
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if not (model := result.scalar_one_or_none()):
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msg: str = f"Task definition '{identifier}' not found."
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raise KeyError(msg)
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await session.delete(model)
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await session.commit()
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return model
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