BackupPrefs.java

/*
 * Copyright (c) 2015 Jonas Kalderstam.
 *
 * 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 com.nononsenseapps.notepad.ui.settings;

import android.content.Context;
import android.os.AsyncTask;
import android.os.Bundle;
import android.preference.Preference;
import android.preference.Preference.OnPreferenceClickListener;
import android.preference.PreferenceFragment;
import android.widget.Toast;

import com.nononsenseapps.notepad.R;
import com.nononsenseapps.notepad.ui.base.DialogConfirmBaseV11.DialogConfirmedListener;
import com.nononsenseapps.notepad.ui.common.DialogExportBackup;
import com.nononsenseapps.notepad.ui.common.DialogRestoreBackup;
import com.nononsenseapps.notepad.data.local.json.JSONBackup;

import java.io.FileNotFoundException;

// import com.nononsenseapps.notepad.NotePad;

public class BackupPrefs extends PreferenceFragment {

	public static final String KEY_IMPORT = "backup_import";
	public static final String KEY_EXPORT = "backup_export";

	private JSONBackup backupMaker;
	private RestoreBackupTask bgTask;

	/**
	 * Run the backup in the background. Locking the UI-thread for up to a few
	 * seconds is not nice...
	 * 
	 */
	private class RestoreBackupTask extends AsyncTask<Void, Void, Integer> {
		protected Integer doInBackground(Void... params) {
			try {
				backupMaker.restoreBackup();
				return 0;
			} catch (FileNotFoundException e) {
				return 1;
			} catch (Exception e) {
				return 2;
			}
		}

		protected void onPostExecute(final Integer result) {
            Context context = getActivity();
            if (context == null) {
                return;
            }
			switch (result) {
			case 0:
				Toast.makeText(getActivity(), R.string.backup_import_success,
						Toast.LENGTH_SHORT).show();
				break;
			case 1:
				Toast.makeText(getActivity(), R.string.backup_file_not_found,
						Toast.LENGTH_SHORT).show();
				break;
			case 2:
				Toast.makeText(getActivity(), R.string.backup_import_failed,
						Toast.LENGTH_SHORT).show();
				break;
			}
		}
	}

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		// Load the preferences from an XML resource
		addPreferencesFromResource(R.xml.app_pref_backup);

		backupMaker = new JSONBackup(getActivity());

		findPreference(KEY_IMPORT).setOnPreferenceClickListener(
				new OnPreferenceClickListener() {

					@Override
					public boolean onPreferenceClick(Preference preference) {

						DialogRestoreBackup.showDialog(getFragmentManager(),
								new DialogConfirmedListener() {

									@Override
									public void onConfirm() {
										bgTask = new RestoreBackupTask();
										bgTask.execute();
									}

								});

						return true;
					}
				});
		findPreference(KEY_EXPORT).setOnPreferenceClickListener(
				new OnPreferenceClickListener() {

					@Override
					public boolean onPreferenceClick(Preference preference) {
						
						DialogExportBackup.showDialog(getFragmentManager(), new DialogConfirmedListener() {
							
							@Override
							public void onConfirm() {
								try {
									backupMaker.writeBackup();
									Toast.makeText(getActivity(),
											R.string.backup_export_success,
											Toast.LENGTH_SHORT).show();
								} catch (Exception e) {
									Toast.makeText(getActivity(),
											R.string.backup_export_failed,
											Toast.LENGTH_SHORT).show();
								}
							}
						});

						return true;
					}
				});

	}
}