is: Add filter support to Count RPC for EndDeviceRegistry

Author: happyRip

api/ttn/lorawan/v3/api.md

@@ -3991,6 +3991,7 @@ Configuration options for static ADR.
 | Field | Type | Label | Description |
 | ----- | ---- | ----- | ----------- |
 | `application_ids` | [`ApplicationIdentifiers`](#ttn.lorawan.v3.ApplicationIdentifiers) |  |  |
+| `filters` | [`ListEndDevicesRequest.Filter`](#ttn.lorawan.v3.ListEndDevicesRequest.Filter) | repeated |  |
 
 #### Field Rules
 

api/ttn/lorawan/v3/end_device.proto

@@ -1348,6 +1348,7 @@ message ListEndDevicesRequest {
 
 message CountEndDevicesRequest {
   ApplicationIdentifiers application_ids = 1 [(validate.rules).message.required = true];
+  repeated ListEndDevicesRequest.Filter filters = 2;
 }
 
 message CountEndDevicesResponse {

pkg/identityserver/bunstore/end_device_store.go

@@ -439,7 +439,9 @@ func (s *endDeviceStore) CountEndDevices(ctx context.Context, ids *ttnpb.Applica
 		by = s.selectWithID(ctx, ids.GetApplicationId())
 	}
 
-	selectQuery := s.newSelectModel(ctx, &EndDevice{}).Apply(by)
+	selectQuery := s.newSelectModel(ctx, &EndDevice{}).
+		Apply(by).
+		Apply(selectWithFilterFromContext(ctx))
 
 	// Count the total number of results.
 	count, err := selectQuery.Count(ctx)

pkg/identityserver/end_device_registry.go

@@ -340,6 +340,13 @@ func (is *IdentityServer) countEndDevices(
 	); err != nil {
 		return nil, err
 	}
+	if req.Filters != nil {
+		for _, filter := range req.Filters {
+			if _, ok := filter.GetField().(*ttnpb.ListEndDevicesRequest_Filter_UpdatedSince); ok {
+				ctx = store.WithFilter(ctx, "updated_at", filter.GetUpdatedSince().AsTime().Format(time.RFC3339Nano))
+			}
+		}
+	}
 	var count uint64
 	err := is.store.Transact(ctx, func(ctx context.Context, st store.Store) (err error) {
 		count, err = st.CountEndDevices(ctx, req.GetApplicationIds())

pkg/ttnpb/end_device.pb.go

@@ -16060,6 +16060,18 @@
                   }
                 ]
               }
+            },
+            {
+              "name": "filters",
+              "description": "",
+              "label": "repeated",
+              "type": "Filter",
+              "longType": "ListEndDevicesRequest.Filter",
+              "fullType": "ttn.lorawan.v3.ListEndDevicesRequest.Filter",
+              "ismap": false,
+              "isoneof": false,
+              "oneofdecl": "",
+              "defaultValue": ""
             }
           ]
         },