added jobs handling.

app/db/jobs.py

@@ -56,6 +56,121 @@ def create_job(
     return job_id
 
 
+def retry_failed_job(job_id: int, user: dict[str, Any]):
+    run_migrations()
+    created_by_user_id = user.get("id") if user else None
+    created_by_username = user.get("username") if user else None
+    created_by_display_name = user.get("display_name") if user else None
+
+    con = get_connection()
+    source_job = con.execute(
+        """
+        SELECT id
+        FROM jobs
+        WHERE id = ?
+          AND status = 'failed'
+        """,
+        (job_id,),
+    ).fetchone()
+    if not source_job:
+        con.close()
+        return None
+
+    cur = con.execute(
+        """
+        INSERT INTO jobs (
+            type,
+            target_type,
+            target_id,
+            payload_json,
+            status,
+            created_by_user_id,
+            created_by_username,
+            created_by_display_name,
+            source
+        )
+        SELECT
+            type,
+            target_type,
+            target_id,
+            payload_json,
+            'queued',
+            ?,
+            ?,
+            ?,
+            'portal_retry'
+        FROM jobs
+        WHERE id = ?
+          AND status = 'failed'
+        """,
+        (created_by_user_id, created_by_username, created_by_display_name, job_id),
+    )
+    if cur.rowcount != 1:
+        con.close()
+        return None
+
+    new_job_id = cur.lastrowid
+    con.commit()
+    con.close()
+
+    append_job_log(new_job_id, "system", f"Job queued as retry of #{job_id}.")
+    return new_job_id
+
+
+def cancel_job(job_id: int):
+    run_migrations()
+    con = get_connection()
+
+    row = con.execute(
+        """
+        SELECT status
+        FROM jobs
+        WHERE id = ?
+        """,
+        (job_id,),
+    ).fetchone()
+    if not row:
+        con.close()
+        return None
+
+    status = (row["status"] or "").lower()
+    if status == "queued":
+        new_status = "cancelled"
+        cur = con.execute(
+            """
+            UPDATE jobs
+            SET status = 'cancelled',
+                finished_at = CURRENT_TIMESTAMP
+            WHERE id = ?
+              AND status = 'queued'
+            """,
+            (job_id,),
+        )
+    elif status == "running":
+        new_status = "cancelled_requested"
+        cur = con.execute(
+            """
+            UPDATE jobs
+            SET status = 'cancelled_requested'
+            WHERE id = ?
+              AND status = 'running'
+            """,
+            (job_id,),
+        )
+    else:
+        con.close()
+        return None
+
+    if cur.rowcount != 1:
+        con.close()
+        return None
+
+    con.commit()
+    con.close()
+    append_job_log(job_id, "system", f"Job status changed from {status} to {new_status}.")
+    return {"previous_status": status, "status": new_status}
+
+
 def update_job_status(
     job_id: int,
     status: str,