org.eclipse.mdm.nucleus/org.eclipse.mdm.application/src/main/webapp/src/app/file-explorer/services/file-reader.service.ts

/********************************************************************************
 * Copyright (c) 2015-2018 Contributors to the Eclipse Foundation
 *
 * See the NOTICE file(s) distributed with this work for additional
 * information regarding copyright ownership.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 ********************************************************************************/
import { Injectable } from '@angular/core';

@Injectable({
  providedIn: 'root'
})
export class FileReaderService {

  constructor() { }

  // reads file from filesystem.
  public readFile(inputFile: File) {
    const reader = new FileReader();
    return new Promise((resolve, reject) => {
      reader.onerror = () => {
        reader.abort();
        reject(new DOMException('Problem parsing input file.'));
      };
      reader.onloadend = () => resolve(reader.result);
      reader.readAsDataURL(inputFile);
    });
  }
}