refactor: clean up code and fix race condition in idlewatcher

internal/docker/idlewatcher/container.go

@@ -0,0 +1,52 @@
+package idlewatcher
+
+import (
+	"context"
+	"errors"
+
+	"github.com/docker/docker/api/types/container"
+)
+
+type (
+	containerMeta struct {
+		ContainerID, ContainerName string
+	}
+	containerState struct {
+		running bool
+		ready   bool
+		err     error
+	}
+)
+
+func (w *Watcher) containerStop(ctx context.Context) error {
+	return w.client.ContainerStop(ctx, w.ContainerID, container.StopOptions{
+		Signal:  string(w.StopSignal),
+		Timeout: &w.StopTimeout,
+	})
+}
+
+func (w *Watcher) containerPause(ctx context.Context) error {
+	return w.client.ContainerPause(ctx, w.ContainerID)
+}
+
+func (w *Watcher) containerKill(ctx context.Context) error {
+	return w.client.ContainerKill(ctx, w.ContainerID, string(w.StopSignal))
+}
+
+func (w *Watcher) containerUnpause(ctx context.Context) error {
+	return w.client.ContainerUnpause(ctx, w.ContainerID)
+}
+
+func (w *Watcher) containerStart(ctx context.Context) error {
+	return w.client.ContainerStart(ctx, w.ContainerID, container.StartOptions{})
+}
+
+func (w *Watcher) containerStatus() (string, error) {
+	ctx, cancel := context.WithTimeoutCause(w.task.Context(), dockerReqTimeout, errors.New("docker request timeout"))
+	defer cancel()
+	json, err := w.client.ContainerInspect(ctx, w.ContainerID)
+	if err != nil {
+		return "", err
+	}
+	return json.State.Status, nil
+}