insomnia/packages/insomnia-app/app/common/select-file-or-folder.js

// @flow

import { remote } from 'electron';

type Options = {
  itemTypes?: Array<'file' | 'directory'>,
  extensions?: Array<string>,
};

type FileSelection = {
  filePath: string,
  canceled: boolean,
};

const selectFileOrFolder = async ({ itemTypes, extensions }: Options): Promise<FileSelection> => {
  // If no types are selected then default to just files and not directories
  const types = itemTypes || ['file'];
  let title = 'Select ';
  if (types.includes('file')) {
    title += ' File';
    if (types.length > 2) {
      title += ' or';
    }
  }
  if (types.includes('directory')) {
    title += ' Directory';
  }
  const options = {
    title: title,
    buttonLabel: 'Select',
    properties: types.map(type => {
      if (type === 'file') {
        return 'openFile';
      }
      if (type === 'directory') {
        return 'openDirectory';
      }
    }),
    filters: [{ name: 'All Files', extensions: ['*'] }],
  };

  // If extensions are provided then filter for just those extensions
  if (extensions?.length) {
    options.filters = [{ name: 'Files', extensions: extensions }];
  }

  const { canceled, filePaths } = await remote.dialog.showOpenDialog(options);

  return { filePath: filePaths[0], canceled };
};

export default selectFileOrFolder;