feat: 支付闭环

service/radio/order_service.go

@@ -0,0 +1,72 @@
+package radio
+
+import (
+	"errors"
+	"sundynix-go/model/radio"
+	"time"
+
+	"gorm.io/gorm"
+)
+
+type OrderService struct{}
+
+var OrderServiceApp = new(OrderService)
+
+// ExecuteOrderUnlock 核心原子操作：解锁权限
+func (s *OrderService) ExecuteOrderUnlock(tx *gorm.DB, outTradeNo string) error {
+	var order radio.Order
+	// 1. 锁住订单行，防止回调和主动查询并发导致时长翻倍
+	if err := tx.Set("gorm:query_option", "FOR UPDATE").
+		Where("out_trade_no = ?", outTradeNo).First(&order).Error; err != nil {
+		return err
+	}
+
+	// 2. 幂等检查
+	if order.Status == 1 {
+		return nil // 已处理，直接返回
+	}
+
+	// 3. 更新订单状态
+	if err := tx.Model(&order).Updates(map[string]interface{}{
+		"status":     1,
+		"pay_status": "SUCCESS",
+	}).Error; err != nil {
+		return err
+	}
+
+	// 4. 根据订单中的 sub_type 决定增加几个月
+	var months int
+	switch order.SubscriptionType {
+	case "1":
+		months = 1 // 月
+	case "2":
+		months = 3 // 季
+	case "3":
+		months = 12 // 年
+	}
+
+	// 5. 更新或创建订阅权限
+	var sub radio.RadioSubscription
+	now := time.Now()
+	err := tx.Where("user_id = ? AND channel_id = ?", order.UserId, order.ChannelId).First(&sub).Error
+
+	if errors.Is(err, gorm.ErrRecordNotFound) {
+		// 首次订阅
+		return tx.Create(&radio.RadioSubscription{
+			UserId:    order.UserId,
+			ChannelId: order.ChannelId,
+			ExpiredAt: now.AddDate(0, months, 0),
+			Status:    1,
+		}).Error
+	} else {
+		// 续费逻辑
+		newExpiredAt := sub.ExpiredAt
+		if sub.ExpiredAt.Before(now) {
+			newExpiredAt = now // 已过期，从现在开始往后加
+		}
+		return tx.Model(&sub).Updates(map[string]interface{}{
+			"expired_at": newExpiredAt.AddDate(0, months, 0),
+			"status":     1,
+		}).Error
+	}
+}