add client adding logic

http.go

@@ -202,6 +202,7 @@ func HttpHandleGroupAddClient(response http.ResponseWriter, request *http.Reques
 	ctx := request.Context()
 
 	var group Group
+	group.Id = affectedGroupId
 	groupPtr, err := CacheGetGroup(affectedGroupId)
 	if err == nil {
 		group = *groupPtr
@@ -225,10 +226,28 @@ func HttpHandleGroupAddClient(response http.ResponseWriter, request *http.Reques
 		return
 	}
 
-	usersToAdd := strings.SplitN(usersToAddString, ",", remainingUsersCount+1)
-	if len(usersToAdd) == 0 {
+	userIdStrings := strings.SplitN(usersToAddString, ",", remainingUsersCount+1)
+	if len(userIdStrings) == 0 {
 		http.Error(response, "no users to add", http.StatusBadRequest)
 		return
 	}
 
+	clientIds := make([]uint32, 0, len(userIdStrings))
+	for _, s := range userIdStrings {
+		id, err := ConvertStringUint32(strings.TrimSpace(s))
+		if err != nil {
+			continue
+		}
+		clientIds = append(clientIds, id)
+	}
+	if len(clientIds) == 0 {
+		http.Error(response, "no valid users", http.StatusBadRequest)
+		return
+	}
+
+	err = DbAddClientsToGroup(ctx, group.Id, clientIds)
+	if err != nil {
+		http.Error(response, "internal server error", http.StatusInternalServerError)
+		return
+	}
 }