sms rate limiting and error reporting

shiftregister/app/dynamic_preferences_registry.py

@@ -48,3 +48,9 @@ class CancelMin(types.DurationPreference):
     section = helper
     name = "min_cancel_time"
     default = datetime.timedelta(hours=6)
+
+@global_preferences_registry.register
+class SMSRate(types.IntegerPreference):
+    section = helper
+    name = "sms_rate"
+    default = 2

shiftregister/app/tasks.py

@@ -5,6 +5,7 @@ from django.db import transaction
 from django.utils import timezone
 from dynamic_preferences.registries import global_preferences_registry
 from .sipgate.sms import send as send_sms
+import sentry_sdk
 
 global_preferences = global_preferences_registry.manager()
 
@@ -28,7 +29,7 @@ def send_messages():
         print("sms disabled, not sending")
         return
 
-    msgs = Message.objects.select_for_update().filter(sent_at__isnull=True)
+    msgs = Message.objects.select_for_update().filter(sent_at__isnull=True)[:global_preferences['helper__sms_rate']*2]
     with transaction.atomic():
         for msg in msgs:
             if msg.sent_at:
@@ -37,8 +38,8 @@ def send_messages():
                 send(msg)
                 msg.sent_at = timezone.now()
                 msg.save()
-            except:
+            except e:
-                pass
+                sentry_sdk.capture_exception(e)
 
 
 # singlemessage so registration links arrive faster.