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/*
* Copyright 2014 Objectos, Fábrica de Software LTDA.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package br.com.objectos.way.gdrive;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

import com.google.api.client.http.GenericUrl;
import com.google.api.client.http.HttpResponse;
import com.google.api.services.drive.Drive;
import com.google.common.base.Strings;

/**
 * @author [email protected] (Marcio Endo)
 */
class DriveExecDownloadUrl extends AbstractDriveExecCommand {

  public DriveExecDownloadUrl(Drive drive, String id) {
    super(drive, id);
  }

  @Override
  InputStream execute(Drive drive, String id) throws IOException {
    String url = id;

    byte[] empty = new byte[] {};
    InputStream res = new ByteArrayInputStream(empty);

    if (!Strings.isNullOrEmpty(url)) {
      HttpResponse resp = drive.getRequestFactory()
          .buildGetRequest(new GenericUrl(url))
          .execute();
      res = resp.getContent();
    }

    return res;
  }

}