Maint: split Go files in dns package

internal/dns/ticker.go

@@ -0,0 +1,66 @@
+package dns
+
+import (
+	"context"
+	"time"
+
+	"github.com/qdm12/gluetun/internal/constants"
+)
+
+func (l *looper) RunRestartTicker(ctx context.Context, done chan<- struct{}) {
+	defer close(done)
+	// Timer that acts as a ticker
+	timer := time.NewTimer(time.Hour)
+	timer.Stop()
+	timerIsStopped := true
+	settings := l.GetSettings()
+	if settings.UpdatePeriod > 0 {
+		timer.Reset(settings.UpdatePeriod)
+		timerIsStopped = false
+	}
+	lastTick := time.Unix(0, 0)
+	for {
+		select {
+		case <-ctx.Done():
+			if !timerIsStopped && !timer.Stop() {
+				<-timer.C
+			}
+			return
+		case <-timer.C:
+			lastTick = l.timeNow()
+
+			status := l.GetStatus()
+			if status == constants.Running {
+				if err := l.updateFiles(ctx); err != nil {
+					l.state.SetStatus(constants.Crashed)
+					l.logger.Error(err.Error())
+					l.logger.Warn("skipping Unbound restart due to failed files update")
+					continue
+				}
+			}
+
+			_, _ = l.ApplyStatus(ctx, constants.Stopped)
+			_, _ = l.ApplyStatus(ctx, constants.Running)
+
+			settings := l.GetSettings()
+			timer.Reset(settings.UpdatePeriod)
+		case <-l.updateTicker:
+			if !timer.Stop() {
+				<-timer.C
+			}
+			timerIsStopped = true
+			settings := l.GetSettings()
+			newUpdatePeriod := settings.UpdatePeriod
+			if newUpdatePeriod == 0 {
+				continue
+			}
+			var waited time.Duration
+			if lastTick.UnixNano() != 0 {
+				waited = l.timeSince(lastTick)
+			}
+			leftToWait := newUpdatePeriod - waited
+			timer.Reset(leftToWait)
+			timerIsStopped = false
+		}
+	}
+}