fix(display): custom program file handling

display/pkg/file_handler.go

@@ -0,0 +1,63 @@
+package pkg
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"plg-mudics/shared"
+	"syscall"
+
+	"github.com/gabriel-vasile/mimetype"
+)
+
+var FileHandler fileHandler = fileHandler{}
+
+type fileHandler struct {
+	runningProgram *exec.Cmd
+}
+
+func (fh *fileHandler) OpenFile(path string) error {
+	var err error
+
+	mType, err := mimetype.DetectFile(path)
+	if err != nil {
+		return fmt.Errorf("failed to detect mime type: %w", err)
+	}
+
+	tempDirPath, err := os.MkdirTemp("", "plg-mudics-program-profile-")
+	if err != nil {
+		return fmt.Errorf("failed to create temporary profile directory: %w", err)
+	}
+
+	err = fh.CloseRunningProgram()
+	if err != nil {
+		return err
+	}
+
+	switch mType.String() {
+	case "application/vnd.openxmlformats-officedocument.presentationml.presentation", "application/vnd.oasis.opendocument.presentation":
+		fh.runningProgram = exec.Command("soffice", "--show", path, "--nologo", "--view", "--norestore", fmt.Sprintf("-env:UserInstallation=file://%s", tempDirPath))
+	case "application/pdf":
+		fh.runningProgram = exec.Command("xreader", path, "--presentation")
+	default:
+		return fmt.Errorf("unsupported file type: %s", mType.String())
+	}
+
+	fh.runningProgram.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
+
+	result := shared.RunShellCommandNonBlocking(fh.runningProgram)
+	if result.ExitCode != 0 {
+		return fmt.Errorf("could not open pdf: %s (%d)", result.Stderr, result.ExitCode)
+	}
+
+	return nil
+}
+
+func (fh *fileHandler) CloseRunningProgram() error {
+	if fh.runningProgram == nil {
+		return nil
+	}
+	err := syscall.Kill(-fh.runningProgram.Process.Pid, syscall.SIGTERM)
+	fh.runningProgram = nil
+	return err
+}