new injection strategies

internal/injection/ydotool.go

@@ -0,0 +1,87 @@
+package injection
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"time"
+)
+
+type ydotoolBackend struct{}
+
+func NewYdotoolBackend() Backend {
+	return &ydotoolBackend{}
+}
+
+func (y *ydotoolBackend) Name() string {
+	return "ydotool"
+}
+
+func (y *ydotoolBackend) Available() error {
+	if _, err := exec.LookPath("ydotool"); err != nil {
+		return fmt.Errorf("ydotool not found: %w (install ydotool package)", err)
+	}
+
+	// Check if ydotoold is running by checking socket
+	socketPath := y.getSocketPath()
+	if socketPath == "" {
+		return fmt.Errorf("ydotoold socket not found - ensure ydotoold is running")
+	}
+
+	// Try to connect to verify daemon is responsive
+	conn, err := net.DialTimeout("unix", socketPath, 500*time.Millisecond)
+	if err != nil {
+		return fmt.Errorf("ydotoold not responding at %s: %w", socketPath, err)
+	}
+	conn.Close()
+
+	return nil
+}
+
+func (y *ydotoolBackend) getSocketPath() string {
+	// Check YDOTOOL_SOCKET env var first
+	if sock := os.Getenv("YDOTOOL_SOCKET"); sock != "" {
+		if _, err := os.Stat(sock); err == nil {
+			return sock
+		}
+	}
+
+	// Check common locations
+	paths := []string{
+		"/run/user/" + fmt.Sprint(os.Getuid()) + "/.ydotool_socket",
+		"/tmp/.ydotool_socket",
+	}
+
+	// Also check XDG_RUNTIME_DIR
+	if xdg := os.Getenv("XDG_RUNTIME_DIR"); xdg != "" {
+		paths = append([]string{filepath.Join(xdg, ".ydotool_socket")}, paths...)
+	}
+
+	for _, p := range paths {
+		if _, err := os.Stat(p); err == nil {
+			return p
+		}
+	}
+
+	return ""
+}
+
+func (y *ydotoolBackend) Inject(ctx context.Context, text string, timeout time.Duration) error {
+	ctx, cancel := context.WithTimeout(ctx, timeout)
+	defer cancel()
+
+	if err := y.Available(); err != nil {
+		return err
+	}
+
+	// ydotool type -- "text"
+	cmd := exec.CommandContext(ctx, "ydotool", "type", "--", text)
+	if err := cmd.Run(); err != nil {
+		return fmt.Errorf("ydotool failed: %w", err)
+	}
+
+	return nil
+}