fix: 添加 blPlus 函数的初步实现，包含用户分数获取和排名计算逻辑

handler/beatleader/beatleader.go

@@ -30,6 +30,67 @@ func init() {
 	handler.RegisterHandler("jbl", screenShotBL, constants.LEVEL_USER)
 }
 
+// func blPlus(msg model.Message) (reply model.Reply) {
+// 	var (
+// 		resultStr  strings.Builder
+// 		err        error
+// 		maxRetries = 5 // 最大重试次数
+// 		attempts   = 0
+// 	)
+// 	var N int
+// 	if len(msg.RawMsg) > len("bl+") {
+// 		N, err = strconv.Atoi(msg.RawMsg[len("bl+"):])
+// 		if err != nil || N <= 0 {
+// 			return model.Reply{
+// 				ReplyMsg:       "请输入一个正整数",
+// 				ReferOriginMsg: true,
+// 				FromMsg:        msg,
+// 			}
+// 		}
+// 	}
+// 	userIdStr := strconv.Itoa(int(msg.UserId))
+// 	userBLID, err := scoresaber.GetSSID(userIdStr)
+// 	if err != nil {
+// 		return model.Reply{
+// 			ReplyMsg:       err.Error(),
+// 			ReferOriginMsg: true,
+// 			FromMsg:        msg,
+// 		}
+// 	}
+// 	var userInfo beatleader.PlayerData
+// 	for attempts < maxRetries {
+// 		err = nil
+// 		userInfo, err = beatleader.FetchPlayerData(userBLID)
+// 		if err != nil {
+// 			break
+// 		}
+// 		attempts++
+// 	}
+// 	if err != nil {
+// 		return model.Reply{
+// 			ReplyMsg:       "获取您的分数时出现问题，请稍后重试。" + err.Error(),
+// 			ReferOriginMsg: true,
+// 			FromMsg:        msg,
+// 		}
+// 	}
+// 	resultStr.WriteString(fmt.Sprintf("您当前的全区排名为：%d\n", userInfo.CountryRank))
+// 	// 获取当前用户所在区对应+N位的玩家列表
+// 	leaderboard, err := beatleader.FetchCountryLeaderboard(userInfo.Country, userInfo.CountryRank-N, userInfo.ID)
+// 	if err != nil {
+// 		return model.Reply{
+// 			ReplyMsg:       "获取当前用户所在区对应+N位的玩家列表时出现问题，请稍后重试。" + err.Error(),
+// 			ReferOriginMsg: true,
+// 			FromMsg:        msg,
+// 		}
+// 	}
+// 	resultStr.WriteString(fmt.Sprintf("您只需要再打出%.2fpp就能达到%s区第%d名。", targetPlayer.PP-userInfo.PP, userInfo.Country, targetPlayer.CountryRank))
+// 	return model.Reply{
+// 		ReplyMsg:       resultStr.String(),
+// 		ReferOriginMsg: true,
+// 		FromMsg:        msg,
+// 	}
+// }
+
 func getMyBL(msg model.Message) (reply *model.Reply) {
 	var (
 		resultStr  string