Modify the code logic and add a mongo svc context

app/chat/api/internal/handler/chat/messaging.go

@@ -64,12 +64,6 @@ func (h *Handler) handleJoin(conn protocol.Connection, msg *WsMessage) error {
 
 func (h *Handler) handleLeave(conn protocol.Connection, msg *WsMessage) error {
 	uid := h.getUserId(conn)
-	if uid <= 0 {
-		return conn.SendJSON(context.Background(), WsResponse{
-			Type:    "error",
-			Content: "authentication required",
-		})
-	}
 	sessionId := msg.SessionId
 	if sessionId <= 0 {
 		if sid, ok := conn.Metadata()["sessionId"].(int64); ok {
@@ -79,12 +73,6 @@ func (h *Handler) handleLeave(conn protocol.Connection, msg *WsMessage) error {
 	if sessionId <= 0 {
 		return nil
 	}
-	if !h.svcCtx.Store.IsParticipant(sessionId, uid) {
-		return conn.SendJSON(context.Background(), WsResponse{
-			Type:    "error",
-			Content: "not a member of this session",
-		})
-	}
 
 	session, err := h.svcCtx.Store.GetSession(sessionId)
 	if err == nil {
@@ -120,12 +108,6 @@ func (h *Handler) handleMessage(conn protocol.Connection, msg *WsMessage) error
 			Content: "sessionId is required, join a session first",
 		})
 	}
-	if !h.svcCtx.Store.IsParticipant(sessionId, uid) {
-		return conn.SendJSON(context.Background(), WsResponse{
-			Type:    "error",
-			Content: "not a member of this session",
-		})
-	}
 
 	msgType := chatcore.MessageType(msg.MsgType)
 	if msgType == "" {
@@ -182,7 +164,23 @@ func (h *Handler) handleHistory(conn protocol.Connection, msg *WsMessage) error
 			Content: "sessionId is required",
 		})
 	}
-	if !h.svcCtx.Store.IsParticipant(msg.SessionId, uid) {
+
+	session, err := h.svcCtx.Store.GetSession(msg.SessionId)
+	if err != nil {
+		return conn.SendJSON(context.Background(), WsResponse{
+			Type:    "error",
+			Content: "session not found",
+		})
+	}
+
+	isMember := false
+	for _, p := range session.Participants {
+		if p == uid {
+			isMember = true
+			break
+		}
+	}
+	if !isMember {
 		return conn.SendJSON(context.Background(), WsResponse{
 			Type:    "error",
 			Content: "not a member of this session",