/* ownCloud Android client application
 *   Copyright (C) 2012  Bartek Przybylski
 *
 *   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 eu.alefzero.webdav;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

public class WebdavUtils {
  public static final SimpleDateFormat DISPLAY_DATE_FORMAT = new SimpleDateFormat("dd.MM.yyyy hh:mm");
  private static final SimpleDateFormat DATETIME_FORMATS[] = {
      new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.US),
      new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz", Locale.US),
      new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.sss'Z'", Locale.US),
      new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ", Locale.US),
      new SimpleDateFormat("EEE MMM dd HH:mm:ss zzz yyyy", Locale.US),
      new SimpleDateFormat("EEEEEE, dd-MMM-yy HH:mm:ss zzz", Locale.US),
      new SimpleDateFormat("EEE MMMM d HH:mm:ss yyyy", Locale.US)};
  
  public static String prepareXmlForPropFind() {
    String ret = "<?xml version=\"1.0\" ?><D:propfind xmlns:D=\"DAV:\"><D:allprop/></D:propfind>";
    return ret;
  }
  
  public static String prepareXmlForPatch() {
    return "<?xml version=\"1.0\" ?><D:propertyupdate xmlns:D=\"DAV:\"></D:propertyupdate>";
  }
  
  public static Date parseResponseDate(String date) {
    Date returnDate = null;
    for (int i = 0; i < DATETIME_FORMATS.length; ++i) {
      try {
        returnDate = DATETIME_FORMATS[i].parse(date);
        return returnDate;
      } catch (ParseException e) {}
    }
    return null;
  }
}
