feat: 在 scoresaber 模块中添加 ss+n 命令，允许用户查询提升排名所需的分数，并优化 FetchPlayerData 函数的返回类型以提高错误处理能力

handler/scoresaber/score.go

@@ -1,6 +1,7 @@
 package scoresaber
 
 import (
+	"fmt"
 	"log"
 	"os"
 	"strconv"
@@ -25,8 +26,75 @@ func init() {
 	handler.RegisterHandler("最新ss", getMyRecentScore, constants.LEVEL_USER)
 	handler.RegisterHelpInform("最新ss", "scoresaber", "查看您的最新游戏记录")
 	handler.RegisterHandler("截ss", screenshotSS, constants.LEVEL_USER)
-	handler.RegisterHelpInform("截ss", "scoresaber", "scoresaber主页截图")
-	handler.RegisterHandler("jss", screenshotSS, constants.LEVEL_USER)
+	handler.RegisterHelpInform("ss+n", "scoresaber", "区排名升高n位还需要打出多少pp")
+	handler.RegisterHandler("ss+n", ssPlusN, constants.LEVEL_USER)
+	// handler.RegisterHelpInform("截ss", "scoresaber", "scoresaber主页截图")
+	// handler.RegisterHandler("jss", screenshotSS, constants.LEVEL_USER)
+}
+
+func ssPlusN(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("ss+") {
+		N, err = strconv.Atoi(msg.RawMsg[len("ss+"):])
+		if err != nil {
+			return model.Reply{
+				ReplyMsg:       "请输入一个整数",
+				ReferOriginMsg: true,
+				FromMsg:        msg,
+			}
+		}
+	}
+	// 获取当前用户在区中的排名
+	userIdStr := strconv.Itoa(int(msg.UserId))
+	var userInfo scoresaber.PlayerData
+	for attempts < maxRetries {
+		err = nil
+		userInfo, err = scoresaber.FetchPlayerData(userIdStr)
+		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 := scoresaber.FetchCountryLeaderboard(userInfo.Country, userInfo.CountryRank-N, userInfo.ID)
+	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,
+		}
+	}
+	if userInfo.CountryRank-N < 0 {
+		resultStr.WriteString(fmt.Sprintf("注意：你最多只需要提升%d名就是%s区Top1了\n", N, userInfo.Country))
+	}
+	//寻找leaderboard中排名为userInfo.CountryRank-N的玩家
+	var targetPlayer scoresaber.PlayerData
+	for _, player := range leaderboard.Players {
+		if player.CountryRank == userInfo.CountryRank-N {
+			targetPlayer = player
+			break
+		}
+	}
+	resultStr.WriteString(fmt.Sprintf("您只需要再打出%.2fpp就能达到%s区第%d名了", targetPlayer.PP-userInfo.PP, userInfo.Country, targetPlayer.CountryRank))
+	return model.Reply{
+		ReplyMsg:       resultStr.String(),
+		ReferOriginMsg: true,
+		FromMsg:        msg,
+	}
 }
 
 func getSSProfile(msg model.Message) (reply model.Reply) {