fix:#53 added empty events check

backend/service/feed/feedFunctions.go

@@ -55,6 +55,8 @@ func ClearFeeds(db *daos.Dao, months int, clock localTime.Clock) {
 
 func CombineEventsInFeed(events model.Events) model.Events {
 	// Combine events with the same name, start, end and course
+	// check if there are events
+	if len(events) > 0 {
 		combinedEvents := model.Events{events[0]}
 
 		for i := 1; i < len(events); i++ {
@@ -79,6 +81,8 @@ func CombineEventsInFeed(events model.Events) model.Events {
 		}
 		return combinedEvents
 	}
+	return model.Events{}
+}
 
 func addNotesIfAlreadyRoomsAdded(events model.Events, combinedEvents model.Events, index2 int, index1 int) string {
 	// check if combinedEvents[index2].Rooms string contains comma "," &#44

backend/service/feed/feedFunctions_test.go

@@ -182,6 +182,13 @@ func TestCombineEventsInFeed(t *testing.T) {
 				},
 			},
 		},
+		{
+			name: "NoEventsInFeed",
+			args: args{
+				events: model.Events{},
+			},
+			want: model.Events{},
+		},
 	}
 	for _, tt := range testCases {
 		t.Run(tt.name, func(t *testing.T) {