update

pkg/telldus-daemon/watcher.go

@@ -0,0 +1,63 @@
+package daemon
+
+import (
+	"log"
+	"path/filepath"
+
+	"github.com/fsnotify/fsnotify"
+)
+
+// Watcher watches for configuration file changes
+type Watcher struct {
+	configPath   string
+	onReloadFunc func() error
+}
+
+// NewWatcher creates a new config file watcher
+func NewWatcher(configPath string, onReload func() error) *Watcher {
+	return &Watcher{
+		configPath:   configPath,
+		onReloadFunc: onReload,
+	}
+}
+
+// Watch starts watching for changes to the configuration file
+func (w *Watcher) Watch() error {
+	watcher, err := fsnotify.NewWatcher()
+	if err != nil {
+		return err
+	}
+	defer watcher.Close()
+
+	// Watch the parent directory since file operations might replace the file
+	configDir := filepath.Dir(w.configPath)
+	if err := watcher.Add(configDir); err != nil {
+		return err
+	}
+
+	log.Printf("Watching for changes to %s", w.configPath)
+
+	for {
+		select {
+		case event, ok := <-watcher.Events:
+			if !ok {
+				return nil
+			}
+			// Check if the event is for our config file
+			if event.Name == w.configPath && (event.Op&fsnotify.Write == fsnotify.Write || event.Op&fsnotify.Create == fsnotify.Create) {
+				log.Printf("Configuration file changed: %s", event.Op.String())
+				// Call reload callback if provided
+				if w.onReloadFunc != nil {
+					if err := w.onReloadFunc(); err != nil {
+						log.Printf("Failed to reload devices: %v", err)
+					}
+				}
+			}
+		case err, ok := <-watcher.Errors:
+			if !ok {
+				return nil
+			}
+			log.Printf("File watcher error: %v", err)
+		}
+	}
+}