refactor(display): use chrome devtools protocol (#38)

display/pkg/open_file.go

@@ -0,0 +1,108 @@
+package pkg
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"log/slog"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"plg-mudics/shared"
+	"syscall"
+
+	"github.com/gabriel-vasile/mimetype"
+
+	"plg-mudics/display/browser"
+)
+
+var fileHandler fileHandlerType = fileHandlerType{}
+
+type fileHandlerType struct {
+	runningProgram *exec.Cmd
+}
+
+func OpenFile(path string) error {
+	ResetView()
+
+	mType, err := mimetype.DetectFile(path)
+	if err != nil {
+		slog.Error("Failed to detect mime type", "file", path, "error", err)
+	}
+
+	switch mType.String() {
+	case "video/mp4":
+		var templateBuffer bytes.Buffer
+		videoTemplate(path).Render(context.Background(), &templateBuffer)
+		browser.Browser.OpenHTML(templateBuffer.String())
+	case "image/jpeg", "image/png", "image/gif":
+		var templateBuffer bytes.Buffer
+		imageTemplate(path).Render(context.Background(), &templateBuffer)
+		browser.Browser.OpenHTML(templateBuffer.String())
+	case "application/pdf":
+		browser.Browser.OpenPDF(path)
+	case "application/vnd.openxmlformats-officedocument.presentationml.presentation", "application/vnd.oasis.opendocument.presentation":
+		err = fileHandler.openFileWithApp(path)
+	default:
+		return fmt.Errorf("unsupported file type: %s", mType.String())
+	}
+
+	return nil
+}
+
+func (fh *fileHandlerType) openFileWithApp(path string) error {
+	var err error
+
+	mType, err := mimetype.DetectFile(path)
+	if err != nil {
+		return fmt.Errorf("failed to detect mime type: %w", err)
+	}
+
+	switch mType.String() {
+	case "application/vnd.openxmlformats-officedocument.presentationml.presentation", "application/vnd.oasis.opendocument.presentation":
+		err = fh.openLibreoffice(path)
+		if err != nil {
+			return err
+		}
+	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 *fileHandlerType) openLibreoffice(path string) error {
+	// yes, we need this weird workaround to delete lock files since libreoffice
+	// doesn't expose an option to ignore them or prevent their creation
+	// the --view argument for some reason doesn't work with --show
+	parent := filepath.Dir(path)
+	cmd := exec.Command("find", parent, "-name", ".~lock*", "-type", "f", "-delete")
+	result := shared.RunShellCommand(cmd)
+	if result.ExitCode != 0 {
+		slog.Warn("could not remove lock files", "path", parent, "stderr", result.Stderr, "exitCode", result.ExitCode)
+	}
+
+	tempDirPath, err := os.MkdirTemp("", "plg-mudics-program-profile-")
+	if err != nil {
+		return fmt.Errorf("failed to create temporary profile directory: %w", err)
+	}
+	fh.runningProgram = exec.Command("soffice", "--show", path, "--nologo", "--norestore", fmt.Sprintf("-env:UserInstallation=file://%s", tempDirPath))
+
+	return nil
+}
+
+func (fh *fileHandlerType) closeRunningProgram() error {
+	if fh.runningProgram == nil {
+		return nil
+	}
+	err := syscall.Kill(-fh.runningProgram.Process.Pid, syscall.SIGTERM)
+	fh.runningProgram = nil
+	return err
+}