二维码自动补发

backend/internal/modules/chat/listing_group.go

@@ -112,7 +112,7 @@ func EnsureListingConversation(tx *gorm.DB, listing model.RentalListing, preferr
 
 	// 6. 发二维码图片(如果有)
 	if qrcodeImageURL != "" {
-		if err := sendQrCodeImage(tx, conversation.ID, qrcodeImageURL); err != nil {
+		if _, err := sendQrCodeImage(tx, conversation.ID, qrcodeImageURL); err != nil {
 			return nil, err
 		}
 	} else {
@@ -121,6 +121,9 @@ func EnsureListingConversation(tx *gorm.DB, listing model.RentalListing, preferr
 		if err := sendSystemMessage(tx, conversation.ID, noQrTip); err != nil {
 			return nil, err
 		}
+		if err := createQrCodeDeliveryTask(tx, conversation.ID); err != nil {
+			return nil, err
+		}
 	}
 
 	// 7. 库存预警检查
@@ -262,7 +265,7 @@ func sendSystemMessage(tx *gorm.DB, conversationID uint64, content string) error
 	return updateConversationLastMessage(tx, conversationID, &message)
 }
 
-func sendQrCodeImage(tx *gorm.DB, conversationID uint64, imageURL string) error {
+func sendQrCodeImage(tx *gorm.DB, conversationID uint64, imageURL string) (*model.ChatMessage, error) {
 	content := "👇 请扫码加入企业微信群"
 
 	message := model.ChatMessage{
@@ -275,11 +278,14 @@ func sendQrCodeImage(tx *gorm.DB, conversationID uint64, imageURL string) error
 	}
 
 	if err := tx.Create(&message).Error; err != nil {
-		return err
+		return nil, err
 	}
 
 	// 更新会话的最后消息
-	return updateConversationLastMessage(tx, conversationID, &message)
+	if err := updateConversationLastMessage(tx, conversationID, &message); err != nil {
+		return nil, err
+	}
+	return &message, nil
 }
 
 func updateConversationLastMessage(tx *gorm.DB, conversationID uint64, message *model.ChatMessage) error {
@@ -326,6 +332,14 @@ func markQrCodeAsUsed(tx *gorm.DB, qrcodeID uint64, conversationID uint64) error
 		}).Error
 }
 
+func createQrCodeDeliveryTask(tx *gorm.DB, conversationID uint64) error {
+	task := model.ChatQrCodeDeliveryTask{
+		ConversationID: conversationID,
+		Status:         "pending",
+	}
+	return tx.Clauses(clause.OnConflict{DoNothing: true}).Create(&task).Error
+}
+
 // pushAlert 事务提交后需要发送的外部推送。
 type pushAlert struct {
 	providers []push.Provider