黄钻买粉钻

resource/redisCli/util.go

@@ -74,3 +74,26 @@ func DelCache(key string) error {
 	}
 	return nil
 }
+
+func DecrBy(key string, num int64) (int64, error) {
+	resNum, err := RedisClient.DecrBy(context.Background(), key, num).Result()
+	if err != nil {
+		return 0, err
+	}
+	return resNum, nil
+}
+
+func DecrNumExpire(key string, num int64, expiration time.Duration) (int64, error) {
+	times, err := DecrBy(key, num)
+	if err != nil {
+		return 0, err
+	}
+	ttl, err := RedisClient.TTL(context.Background(), key).Result()
+	if err != nil {
+		return 0, err
+	}
+	if ttl == -1 {
+		RedisClient.Expire(context.Background(), key, expiration)
+	}
+	return times, nil
+}