feat: add plugin Minecraft 服务器状态查询 (#1135)

plugin/minecraftobserver/ping.go

@@ -0,0 +1,62 @@
+package minecraftobserver
+
+import (
+	"encoding/json"
+	"github.com/RomiChan/syncx"
+	"github.com/Tnze/go-mc/bot"
+	"time"
+)
+
+var (
+	// pingServerUnreachableCounter Ping服务器不可达计数器，防止bot本体网络抖动导致误报
+	pingServerUnreachableCounter = syncx.Map[string, pingServerUnreachableCounterDef]{}
+	// 计数器阈值
+	pingServerUnreachableCounterThreshold = int64(3)
+	// 时间阈值
+	pingServerUnreachableCounterTimeThreshold = time.Minute * 30
+)
+
+type pingServerUnreachableCounterDef struct {
+	count                int64
+	firstUnreachableTime time.Time
+}
+
+func addPingServerUnreachableCounter(addr string, ts time.Time) (int64, time.Time) {
+	key := addr
+	get, ok := pingServerUnreachableCounter.Load(key)
+	if !ok {
+		pingServerUnreachableCounter.Store(key, pingServerUnreachableCounterDef{
+			count:                1,
+			firstUnreachableTime: ts,
+		})
+		return 1, ts
+	}
+	// 存在则更新，时间戳不变
+	pingServerUnreachableCounter.Store(key, pingServerUnreachableCounterDef{
+		count:                get.count + 1,
+		firstUnreachableTime: get.firstUnreachableTime,
+	})
+	return get.count + 1, get.firstUnreachableTime
+}
+
+func resetPingServerUnreachableCounter(addr string) {
+	key := addr
+	pingServerUnreachableCounter.Delete(key)
+}
+
+// getMinecraftServerStatus 获取Minecraft服务器状态
+func getMinecraftServerStatus(addr string) (*serverPingAndListResp, error) {
+	var s serverPingAndListResp
+	resp, delay, err := bot.PingAndListTimeout(addr, time.Second*5)
+	if err != nil {
+		//logrus.Errorln(logPrefix+"PingAndList error: ", err)
+		return nil, err
+	}
+	err = json.Unmarshal(resp, &s)
+	if err != nil {
+		//logrus.Errorln(logPrefix+"Parse json response fail: ", err)
+		return nil, err
+	}
+	s.Delay = delay
+	return &s, nil
+}