feat: annuleren taak toegevoegd

webui/backend/app/services/task_service.py

@@ -2,12 +2,16 @@ from __future__ import annotations
 
 from backend.app.api.errors import AppError
 from backend.app.api.schemas import TaskDetailResponse, TaskListItem, TaskListResponse
+from backend.app.db.history_repository import HistoryRepository
 from backend.app.db.task_repository import TaskRepository
 
+FILE_ACTION_CANCELLABLE_OPERATIONS = {"copy", "move", "duplicate", "delete"}
+
 
 class TaskService:
-    def __init__(self, repository: TaskRepository):
+    def __init__(self, repository: TaskRepository, history_repository: HistoryRepository | None = None):
         self._repository = repository
+        self._history_repository = history_repository
 
     def create_task(self, operation: str, source: str, destination: str) -> TaskDetailResponse:
         task = self._repository.create_task(operation=operation, source=source, destination=destination)
@@ -40,3 +44,41 @@ class TaskService:
                 for task in tasks
             ]
         )
+
+    def cancel_task(self, task_id: str) -> TaskDetailResponse:
+        task = self._repository.get_task(task_id)
+        if not task:
+            raise AppError(
+                code="task_not_found",
+                message="Task was not found",
+                status_code=404,
+                details={"task_id": task_id},
+            )
+        if task["operation"] not in FILE_ACTION_CANCELLABLE_OPERATIONS:
+            raise AppError(
+                code="task_not_cancellable",
+                message="Task cannot be cancelled",
+                status_code=409,
+                details={"task_id": task_id, "status": task["status"]},
+            )
+        if task["status"] not in {"queued", "running", "cancelling"}:
+            raise AppError(
+                code="task_not_cancellable",
+                message="Task cannot be cancelled",
+                status_code=409,
+                details={"task_id": task_id, "status": task["status"]},
+            )
+
+        updated = self._repository.request_cancellation(task_id)
+        if not updated:
+            raise AppError(
+                code="task_not_cancellable",
+                message="Task cannot be cancelled",
+                status_code=409,
+                details={"task_id": task_id, "status": task["status"]},
+            )
+
+        if updated["status"] == "cancelled" and self._history_repository:
+            self._history_repository.update_entry(entry_id=task_id, status="cancelled")
+
+        return TaskDetailResponse(**updated)