fix:#53 added empty events check

backend/service/feed/feedFunctions.go

@@ -55,29 +55,33 @@ 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
-	combinedEvents := model.Events{events[0]}
+	// check if there are events
+	if len(events) > 0 {
+		combinedEvents := model.Events{events[0]}
 
-	for i := 1; i < len(events); i++ {
-		// check if the event is already in the combinedEvents
-		alreadyInCombinedEvents := false
+		for i := 1; i < len(events); i++ {
+			// check if the event is already in the combinedEvents
+			alreadyInCombinedEvents := false
 
-		for j := 0; j < len(combinedEvents); j++ {
-			if events[i].Name == combinedEvents[j].Name &&
-				events[i].Start == combinedEvents[j].Start &&
-				events[i].End == combinedEvents[j].End &&
-				events[i].Course == combinedEvents[j].Course {
-				alreadyInCombinedEvents = true
-				combinedEvents[j].Notes = addNotesIfAlreadyRoomsAdded(events, combinedEvents, j, i)
-				combinedEvents[j].Prof = combineProfs(events, i, combinedEvents, j)
-				combinedEvents[j].Rooms = combineRooms(events, i, combinedEvents, j)
-				break
+			for j := 0; j < len(combinedEvents); j++ {
+				if events[i].Name == combinedEvents[j].Name &&
+					events[i].Start == combinedEvents[j].Start &&
+					events[i].End == combinedEvents[j].End &&
+					events[i].Course == combinedEvents[j].Course {
+					alreadyInCombinedEvents = true
+					combinedEvents[j].Notes = addNotesIfAlreadyRoomsAdded(events, combinedEvents, j, i)
+					combinedEvents[j].Prof = combineProfs(events, i, combinedEvents, j)
+					combinedEvents[j].Rooms = combineRooms(events, i, combinedEvents, j)
+					break
+				}
+			}
+			if !alreadyInCombinedEvents {
+				combinedEvents = append(combinedEvents, events[i])
 			}
 		}
-		if !alreadyInCombinedEvents {
-			combinedEvents = append(combinedEvents, events[i])
-		}
+		return combinedEvents
 	}
-	return combinedEvents
+	return model.Events{}
 }
 
 func addNotesIfAlreadyRoomsAdded(events model.Events, combinedEvents model.Events, index2 int, index1 int) string {

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) {