helpers.js

/*
 * Copyright (C) 2016 - present Instructure, Inc.
 *
 * This file is part of Canvas.
 *
 * Canvas is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by the Free
 * Software Foundation, version 3 of the License.
 *
 * Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Affero General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

  const Helpers = {
    isValidImageType (mimeType) {
      switch (mimeType) {
        case 'image/jpeg':
        case 'image/gif':
        case 'image/png':
          return true;
          break;
        default:
          return false;
          break;
      }
    },

    createFormData (uploadParams) {
      const formData = new FormData();
      Object.keys(uploadParams).forEach((key) => {
        formData.append(key, uploadParams[key]);
      });
      return formData;
    },

    extractInfoFromEvent (event) {
      let file = '';
      let type = '';
      if (event.type === 'change') {
        file = event.target.files[0];
        type = file.type;
      } else {
        type = event.dataTransfer.files[0].type;
        file = event.dataTransfer.files[0];
      }

      return {file, type};
    }
  };
export default Helpers