完成客服工作台闭环

server/internal/handler/widget.go

@@ -105,6 +105,8 @@ func (h *WidgetHandler) Init(c *gin.Context) {
 		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": "创建会话失败"})
 		return
 	}
+	model.DB.Model(&model.Customer{}).Where("id = ? AND tenant_id = ?", customer.ID, channel.TenantID).
+		Updates(map[string]interface{}{"conversation_count": gorm.Expr("conversation_count + 1"), "last_contact_at": time.Now()})
 	if payload, err := ws.NewEvent("session_created", session.ID, session); err == nil {
 		ws.DefaultHub.BroadcastToTenantStaff(session.TenantID, payload)
 	}
@@ -150,6 +152,11 @@ func (h *WidgetHandler) SendMessage(c *gin.Context) {
 	if req.Type == "" {
 		req.Type = "text"
 	}
+	content, err := validateMessageContent(req.Type, req.Content)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": err.Error()})
+		return
+	}
 
 	session, ok := loadVisitorSession(c, req.SessionID, visitorTokenFromRequest(c, req.VisitorToken))
 	if !ok {
@@ -160,21 +167,12 @@ func (h *WidgetHandler) SendMessage(c *gin.Context) {
 		return
 	}
 
-	// 如果是等待中的会话，更新为活跃
-	if session.Status == "waiting" {
-		if err := model.DB.Model(session).Update("status", "active").Error; err != nil {
-			c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": "更新会话失败"})
-			return
-		}
-		session.Status = "active"
-	}
-
 	custID := session.CustomerID
 	msg := model.Message{
 		SessionID:  session.ID,
 		SenderType: "visitor",
 		SenderID:   &custID,
-		Content:    req.Content,
+		Content:    content,
 		Type:       req.Type,
 		SentAt:     time.Now(),
 	}
@@ -183,8 +181,14 @@ func (h *WidgetHandler) SendMessage(c *gin.Context) {
 		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": "发送失败"})
 		return
 	}
+	model.DB.Model(&model.Customer{}).Where("id = ? AND tenant_id = ?", session.CustomerID, session.TenantID).Update("last_contact_at", time.Now())
 	if payload, err := ws.NewEvent("message", session.ID, msg); err == nil {
-		ws.DefaultHub.BroadcastToSession(session.TenantID, session.ID, session.AgentID, payload)
+		if session.AgentID == nil {
+			// 等待会话的消息要通知全部客服，便于任一在线客服及时领取。
+			ws.DefaultHub.BroadcastToTenantStaff(session.TenantID, payload)
+		} else {
+			ws.DefaultHub.BroadcastToSession(session.TenantID, session.ID, session.AgentID, payload)
+		}
 	}
 
 	c.JSON(http.StatusOK, gin.H{"code": 0, "data": msg})