signal backend, app cleanup

app/item/tasks.py

@@ -0,0 +1,28 @@
+from celery.schedules import crontab
+from django.conf import settings
+
+from ..signalbot import rpc
+from ..celery import app
+
+from . import models
+
+@app.task(queue="default")
+def announce_items():
+    pass
+
+
+@app.task(queue="default")
+def notify_moderators(id, link):
+    comment = models.Comment.objects.filter(id=id).first()
+    if comment:
+        message = "%s commnented on %s\n\n%s" % (comment.name, link, comment.text)
+        r = rpc.send(message, group=settings.SIGNAL_MODERATORS_GROUP)
+        if r and "timestamp" in r:
+            comment.data["moderator_ts"] = r["timestamp"]
+            comment.save()
+        else:
+            print("failed to notify", r)
+
+@app.on_after_finalize.connect
+def setup_periodic_tasks(sender, **kwargs):
+    sender.add_periodic_task(crontab(minute="*/2"), announce_items.s())