add system error.

server/internal/session/session.go

@@ -86,7 +86,7 @@ func (session *Session) Kick(reason string) error {
 	if session.socket == nil {
 		return nil
 	}
-	if err := session.socket.Send(&message.Disconnect{
+	if err := session.socket.Send(&message.SystemMessage{
 		Event:   event.SYSTEM_DISCONNECT,
 		Message: reason,
 	}); err != nil {

server/internal/types/event/events.go

@@ -2,6 +2,7 @@ package event
 
 const (
 	SYSTEM_DISCONNECT = "system/disconnect"
+	SYSTEM_ERROR      = "system/error"
 )
 
 const (

server/internal/types/message/messages.go

@@ -10,8 +10,9 @@ type Message struct {
 	Event string `json:"event"`
 }
 
-type Disconnect struct {
+type SystemMessage struct {
 	Event   string `json:"event"`
+	Title   string `json:"title"`
 	Message string `json:"message"`
 }
 

server/internal/websocket/broadcast.go

@@ -12,8 +12,17 @@ func (h *MessageHandler) boradcastCreate(session types.Session, payload *message
 		return nil
 	}
 
-	if err := h.broadcast.Create(payload.URL); err != nil {
-		return err
+	pipelineErr := h.broadcast.Create(payload.URL)
+	if pipelineErr != nil {
+		if err := session.Send(
+			message.SystemMessage{
+				Event:   event.SYSTEM_ERROR,
+				Title:   "Error while starting broadcast",
+				Message: pipelineErr.Error(),
+			}); err != nil {
+			h.logger.Warn().Err(err).Msgf("sending event %s has failed", event.SYSTEM_ERROR)
+			return err
+		}
 	}
 
 	if err := h.boradcastStatus(session); err != nil {

server/internal/websocket/websocket.go

@@ -133,7 +133,7 @@ func (ws *WebSocketHandler) Upgrade(w http.ResponseWriter, r *http.Request) erro
 	if err != nil {
 		ws.logger.Warn().Err(err).Msg("authentication failed")
 
-		if err = connection.WriteJSON(message.Disconnect{
+		if err = connection.WriteJSON(message.SystemMessage{
 			Event:   event.SYSTEM_DISCONNECT,
 			Message: "invalid_password",
 		}); err != nil {
@@ -160,7 +160,7 @@ func (ws *WebSocketHandler) Upgrade(w http.ResponseWriter, r *http.Request) erro
 	}
 
 	if !ok {
-		if err = connection.WriteJSON(message.Disconnect{
+		if err = connection.WriteJSON(message.SystemMessage{
 			Event:   event.SYSTEM_DISCONNECT,
 			Message: reason,
 		}); err != nil {