SSE 推送替代轮训

backend/internal/modules/order/repository.go

@@ -20,7 +20,8 @@ import (
 )
 
 type Repository struct {
-	db *gorm.DB
+	db      *gorm.DB
+	chatRepo *chat.Repository
 }
 
 const defaultPendingPaymentTimeoutMinutes = 15
@@ -29,6 +30,10 @@ func NewRepository(db *gorm.DB) *Repository {
 	return &Repository{db: db}
 }
 
+func (r *Repository) SetChatRepo(cr *chat.Repository) {
+	r.chatRepo = cr
+}
+
 type orderPricing struct {
 	RentAmount      float64
 	OwnerRentAmount float64
@@ -178,7 +183,8 @@ func (r *Repository) Create(renterID uint64, req CreateRequest) (*OrderDTO, erro
 }
 
 func (r *Repository) Pay(userID uint64, orderID uint64) error {
-	return r.db.Transaction(func(tx *gorm.DB) error {
+	var newConvID uint64
+	err := r.db.Transaction(func(tx *gorm.DB) error {
 		var order model.RentalOrder
 		if err := tx.Clauses(clause.Locking{Strength: "UPDATE"}).
 			Where("id = ? AND renter_id = ?", orderID, userID).
@@ -238,9 +244,11 @@ func (r *Repository) Pay(userID uint64, orderID uint64) error {
 		order.HandoffStatus = "pending_owner"
 		listing.Status = "rented"
 		account.Status = "rented"
-		if _, err := chat.EnsureOrderConversation(tx, order); err != nil {
+		conv, err := chat.EnsureOrderConversation(tx, order)
+		if err != nil {
 			return err
 		}
+		newConvID = conv.ID
 		orderID := order.ID
 		if err := notification.Append(tx,
 			notification.Entry{
@@ -270,6 +278,14 @@ func (r *Repository) Pay(userID uint64, orderID uint64) error {
 		}
 		return tx.Save(&account).Error
 	})
+	if err != nil {
+		return err
+	}
+	// 事务成功后推送群聊创建事件
+	if newConvID > 0 && r.chatRepo != nil {
+		r.chatRepo.NotifyNewConversation(newConvID)
+	}
+	return nil
 }
 
 func (r *Repository) Cancel(userID uint64, orderID uint64) error {