feat(servers): implement saervers monitoring

internal/core/server_poller.go

@@ -0,0 +1,88 @@
+package core
+
+import (
+	"context"
+	"encoding/json"
+	"log"
+	"time"
+
+	"gitea.mrixs.me/minecraft-platform/backend/internal/database"
+	"gitea.mrixs.me/minecraft-platform/backend/internal/models"
+	"github.com/Tnze/go-mc/bot/basic"
+	"github.com/Tnze/go-mc/net"
+)
+
+type ServerPoller struct {
+	Repo *database.ServerRepository
+}
+
+func (p *ServerPoller) Start(ctx context.Context) {
+	log.Println("Starting server poller...")
+	ticker := time.NewTicker(60 * time.Second)
+	defer ticker.Stop()
+
+	p.pollAllServers(ctx)
+
+	for {
+		select {
+		case <-ticker.C:
+			p.pollAllServers(ctx)
+		case <-ctx.Done():
+			log.Println("Stopping server poller...")
+			return
+		}
+	}
+}
+
+func (p *ServerPoller) pollAllServers(ctx context.Context) {
+	servers, err := p.Repo.GetAllEnabledServers(ctx)
+	if err != nil {
+		log.Printf("Poller: failed to get servers: %v", err)
+		return
+	}
+
+	for _, s := range servers {
+		go p.pollServer(ctx, s)
+	}
+}
+
+func (p *ServerPoller) pollServer(ctx context.Context, server *models.GameServer) {
+	resp, delay, err := net.PingAndListTimeout(server.Address, 5*time.Second)
+	if err != nil {
+		log.Printf("Poller: failed to ping %s (%s): %v", server.Name, server.Address, err)
+		return
+	}
+
+	var status basic.ServerList
+	if err := json.Unmarshal(resp, &status); err != nil {
+		log.Printf("Poller: failed to unmarshal status for %s: %v", server.Name, err)
+		return
+	}
+
+	// MOTD может быть сложным объектом, извлекаем текст
+	var motdText string
+	if s, ok := status.Description.(string); ok {
+		motdText = s
+	} else {
+		if m, ok := status.Description.(map[string]interface{}); ok {
+			if t, ok := m["text"].(string); ok {
+				motdText = t
+			}
+		}
+	}
+
+	updateData := &models.ServerStatus{
+		StatusJSON:  string(resp),
+		Motd:        motdText,
+		PlayerCount: status.Players.Online,
+		MaxPlayers:  status.Players.Max,
+		VersionName: status.Version.Name,
+		Ping:        delay.Milliseconds(),
+	}
+
+	if err := p.Repo.UpdateServerStatus(ctx, server.ID, updateData); err != nil {
+		log.Printf("Poller: failed to update status for %s: %v", server.Name, err)
+	} else {
+		log.Printf("Poller: successfully polled %s", server.Name)
+	}
+}