init work of uptime

internal/monitor/tcp.go

@@ -0,0 +1,46 @@
+package monitor
+
+import (
+	"fmt"
+	"net"
+	"time"
+
+	"arclineit/arcline-uptime/internal/config"
+)
+
+type TCPChecker struct {
+	cfg     config.MonitorConfig
+	addr    string
+	timeout time.Duration
+}
+
+func NewTCPChecker(cfg config.MonitorConfig, timeout time.Duration) *TCPChecker {
+	return &TCPChecker{
+		cfg:     cfg,
+		addr:    fmt.Sprintf("%s:%d", cfg.Host, cfg.Port),
+		timeout: timeout,
+	}
+}
+
+func (t *TCPChecker) Name()     string        { return t.cfg.Name }
+func (t *TCPChecker) Interval() time.Duration { return time.Duration(t.cfg.Interval) * time.Second }
+
+func (t *TCPChecker) Check() Result {
+	start := time.Now()
+	result := Result{
+		MonitorName: t.cfg.Name,
+		CheckedAt:   start,
+	}
+
+	conn, err := net.DialTimeout("tcp", t.addr, t.timeout)
+	result.ResponseTime = time.Since(start)
+	if err != nil {
+		result.Error = err.Error()
+		return result
+	}
+	conn.Close()
+
+	result.Up = true
+	applyThreshold(&result, t.cfg.MaxResponseMS)
+	return result
+}