major server manager overhaul

ServerManagerWebApp/backend/app/scheduler.py

@@ -0,0 +1,68 @@
+from apscheduler.schedulers.background import BackgroundScheduler
+from apscheduler.jobstores.sqlalchemy import SQLAlchemyJobStore
+from .database import engine
+from .tasks import task_organize_comics, task_update_metadata, task_sort_by_artist
+import logging
+
+logger = logging.getLogger(__name__)
+
+# Map readable names to Huey task functions
+TASK_MAP = {
+    "organize_comics": task_organize_comics,
+    "update_metadata": task_update_metadata,
+    "sort_by_artist": task_sort_by_artist
+}
+
+jobstores = {
+    'default': SQLAlchemyJobStore(engine=engine)
+}
+
+scheduler = BackgroundScheduler(jobstores=jobstores)
+
+def start_scheduler():
+    try:
+        scheduler.start()
+        logger.info("Scheduler started.")
+    except Exception as e:
+        logger.error(f"Failed to start scheduler: {e}")
+
+def add_job(task_name, cron_str, args=None, kwargs=None):
+    if task_name not in TASK_MAP:
+        raise ValueError(f"Unknown task: {task_name}")
+    
+    func = TASK_MAP[task_name]
+    
+    # Parse cron string (e.g. "* * * * *") -> minute, hour, day, month, day_of_week
+    # Simple implementation: expect "min hour day month day_of_week"
+    try:
+        parts = cron_str.split()
+        if len(parts) != 5:
+            raise ValueError("Invalid cron format. Expected 5 fields.")
+        
+        trigger_args = {
+            'minute': parts[0],
+            'hour': parts[1],
+            'day': parts[2],
+            'month': parts[3],
+            'day_of_week': parts[4]
+        }
+        
+        job = scheduler.add_job(func, 'cron', args=args, kwargs=kwargs, **trigger_args)
+        return job.id
+    except Exception as e:
+        logger.error(f"Failed to add job: {e}")
+        raise e
+
+def get_jobs():
+    jobs = []
+    for job in scheduler.get_jobs():
+        jobs.append({
+            "id": job.id,
+            "name": job.name,
+            "next_run": str(job.next_run_time),
+            "trigger": str(job.trigger)
+        })
+    return jobs
+
+def remove_job(job_id):
+    scheduler.remove_job(job_id)