launchFilePicker method

Implementation

void launchFilePicker(
    {required BuildContext context,
    required WidgetRef ref,
    required AppModel appModel}) async {
  List<Directory> rootDirectories =
      await appModel.getFilePickerDirectoriesForMediaType(mediaType);

  List<String> usedFiles = appModel
      .getMediaSourceHistory(mediaSource: this)
      .map((item) => item.mediaIdentifier)
      .map((e) => e.replaceAll('file://', ''))
      .toList();

  Iterable<String>? filePaths = await FilesystemPicker.open(
    allowedExtensions: ['.html'],
    context: context,
    rootDirectories: rootDirectories,
    fsType: FilesystemType.file,
    title: '',
    pickText: t.dialog_select,
    cancelText: t.dialog_cancel,
    themeData: Theme.of(context),
    folderIconColor: Theme.of(context).colorScheme.primary,
    usedFiles: usedFiles,
    currentActiveFile: appModel.currentMediaItem?.mediaIdentifier,
  );

  if (filePaths == null || filePaths.isEmpty) {
    return;
  }

  String filePath = filePaths.first;
  String fileBasename = path.basename(filePath);

  String directory = path.dirname(filePath);
  String directoryBasename = path.basename(directory);

  String parentDirectory = path.dirname(directory);

  appModel.setLastPickedDirectory(
    type: ReaderMediaType.instance,
    directory: Directory(path.dirname(filePath)),
  );

  HeadlessInAppWebView webView = HeadlessInAppWebView(
    initialOptions: InAppWebViewGroupOptions(
      crossPlatform: InAppWebViewOptions(
        allowFileAccessFromFileURLs: true,
        allowUniversalAccessFromFileURLs: true,
      ),
      android: AndroidInAppWebViewOptions(),
    ),
    initialUrlRequest: URLRequest(
      url: Uri.parse(
          'file://$parentDirectory/${Uri.encodeComponent(directoryBasename)}/${Uri.encodeComponent(fileBasename)}'),
    ),
    onLoadStop: (controller, url) async {
      MediaItem? item = await generateMediaItemFromWebView(
        appModel: appModel,
        controller: controller,
      );
      if (item == null) {
        Fluttertoast.showToast(msg: t.invalid_mokuro_file);
      } else {
        appModel.openMedia(
          context: context,
          item: item,
          ref: ref,
          mediaSource: this,
        );
      }
    },
  );

  await webView.run();
}