AttachmentTask.java

/*
 * Copyright (C) 2013-2020 Federico Iosue (federico@iosue.it)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package it.feio.android.omninotes.async;

import android.net.Uri;
import android.os.AsyncTask;
import android.text.TextUtils;
import androidx.fragment.app.Fragment;
import it.feio.android.omninotes.OmniNotes;
import it.feio.android.omninotes.models.Attachment;
import it.feio.android.omninotes.models.listeners.OnAttachingFileListener;
import it.feio.android.omninotes.utils.StorageHelper;
import java.lang.ref.WeakReference;


public class AttachmentTask extends AsyncTask<Void, Void, Attachment> {

  private final WeakReference<Fragment> mFragmentWeakReference;
  private OnAttachingFileListener mOnAttachingFileListener;
  private Uri uri;
  private String fileName;


  public AttachmentTask(Fragment mFragment, Uri uri,
      OnAttachingFileListener mOnAttachingFileListener) {
    this(mFragment, uri, null, mOnAttachingFileListener);
  }


  public AttachmentTask(Fragment mFragment, Uri uri, String fileName,
      OnAttachingFileListener mOnAttachingFileListener) {
    mFragmentWeakReference = new WeakReference<>(mFragment);
    this.uri = uri;
    this.fileName = TextUtils.isEmpty(fileName) ? "" : fileName;
    this.mOnAttachingFileListener = mOnAttachingFileListener;
  }


  @Override
  protected Attachment doInBackground(Void... params) {
    Attachment attachment = StorageHelper.createAttachmentFromUri(OmniNotes.getAppContext(), uri);
    attachment.setName(this.fileName);
    return attachment;
  }


  @Override
  protected void onPostExecute(Attachment mAttachment) {
    if (isAlive()) {
      if (mAttachment != null) {
        mOnAttachingFileListener.onAttachingFileFinished(mAttachment);
      } else {
        mOnAttachingFileListener.onAttachingFileErrorOccurred(null);
      }
    } else {
      if (mAttachment != null) {
        StorageHelper.delete(OmniNotes.getAppContext(), mAttachment.getUri().getPath());
      }
    }
  }


  private boolean isAlive() {
    return mFragmentWeakReference != null
        && mFragmentWeakReference.get() != null
        && mFragmentWeakReference.get().isAdded()
        && mFragmentWeakReference.get().getActivity() != null
        && !mFragmentWeakReference.get().getActivity().isFinishing();
  }

}