update

pkg/telldus-daemon/daemon.go

@@ -0,0 +1,156 @@
+package daemon
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"os/exec"
+	"sync"
+	"syscall"
+	"time"
+
+	"app/pkg/telldus"
+)
+
+// Manager handles the telldusd daemon lifecycle
+type Manager struct {
+	cmd *exec.Cmd
+	mu  sync.Mutex
+}
+
+// New creates a new daemon manager
+func New() *Manager {
+	return &Manager{}
+}
+
+// Start starts the telldusd daemon and captures its output
+func (m *Manager) Start() error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	if m.cmd != nil && m.cmd.Process != nil {
+		log.Println("Telldusd already running")
+		return nil
+	}
+
+	log.Println("Starting telldusd...")
+	cmd := exec.Command("/usr/local/sbin/telldusd", "--nodaemon")
+
+	// Capture stdout
+	stdout, err := cmd.StdoutPipe()
+	if err != nil {
+		return fmt.Errorf("failed to get stdout pipe: %v", err)
+	}
+
+	// Capture stderr
+	stderr, err := cmd.StderrPipe()
+	if err != nil {
+		return fmt.Errorf("failed to get stderr pipe: %v", err)
+	}
+
+	// Start the command
+	if err := cmd.Start(); err != nil {
+		return fmt.Errorf("failed to start telldusd: %v", err)
+	}
+
+	m.cmd = cmd
+
+	// Log stdout in a goroutine
+	go func() {
+		scanner := bufio.NewScanner(stdout)
+		for scanner.Scan() {
+			log.Printf("[telldusd] %s", scanner.Text())
+		}
+	}()
+
+	// Log stderr in a goroutine
+	go func() {
+		scanner := bufio.NewScanner(stderr)
+		for scanner.Scan() {
+			log.Printf("[telldusd] ERROR: %s", scanner.Text())
+		}
+	}()
+
+	// Monitor process in a goroutine
+	go func() {
+		err := cmd.Wait()
+		m.mu.Lock()
+		m.cmd = nil
+		m.mu.Unlock()
+		if err != nil {
+			log.Printf("Telldusd exited with error: %v", err)
+		} else {
+			log.Println("Telldusd exited normally")
+		}
+	}()
+
+	// Give telldusd a moment to start
+	time.Sleep(500 * time.Millisecond)
+	log.Println("Telldusd started successfully")
+	return nil
+}
+
+// Stop stops the telldusd daemon
+func (m *Manager) Stop() error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	if m.cmd == nil || m.cmd.Process == nil {
+		log.Println("Telldusd not running")
+		return nil
+	}
+
+	log.Println("Stopping telldusd...")
+
+	// Send SIGTERM
+	if err := m.cmd.Process.Signal(syscall.SIGTERM); err != nil {
+		log.Printf("Failed to send SIGTERM to telldusd: %v", err)
+		// Try SIGKILL as fallback
+		if err := m.cmd.Process.Kill(); err != nil {
+			return fmt.Errorf("failed to kill telldusd: %v", err)
+		}
+	}
+
+	// Wait for process to exit (with timeout)
+	done := make(chan error, 1)
+	go func() {
+		done <- m.cmd.Wait()
+	}()
+
+	select {
+	case <-done:
+		log.Println("Telldusd stopped successfully")
+	case <-time.After(5 * time.Second):
+		log.Println("Telldusd did not stop gracefully, killing...")
+		m.cmd.Process.Kill()
+	}
+
+	m.cmd = nil
+	return nil
+}
+
+// Restart restarts the telldusd daemon
+func (m *Manager) Restart() error {
+	log.Println("Restarting telldusd due to configuration change...")
+
+	if err := m.Stop(); err != nil {
+		log.Printf("Error stopping telldusd: %v", err)
+	}
+
+	// Give it a moment to fully stop
+	time.Sleep(1 * time.Second)
+
+	// Close and reinitialize telldus library
+	telldus.Close()
+	time.Sleep(500 * time.Millisecond)
+
+	if err := m.Start(); err != nil {
+		return err
+	}
+
+	// Reinitialize telldus library
+	telldus.Init()
+
+	log.Println("Telldusd restarted successfully")
+	return nil
+}

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)
+		}
+	}
+}