app/src/main/java/de/dhbwloe/campusapp/network/IscRequestHelper.java

   1 /* IscRequestHelper.java
   2  *
   3  * This program is free software: you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation, either version 3 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  15  */
  16 package de.dhbwloe.campusapp.network;
  17 import android.util.Log;
  18
  19 import com.loopj.android.http.AsyncHttpClient;
  20 import com.loopj.android.http.AsyncHttpResponseHandler;
  21
  22 import net.fortuna.ical4j.data.CalendarBuilder;
  23 import net.fortuna.ical4j.data.ParserException;
  24 import net.fortuna.ical4j.model.Calendar;
  25
  26 import java.io.ByteArrayInputStream;
  27 import java.io.IOException;
  28 import java.io.InputStream;
  29 import java.io.UnsupportedEncodingException;
  30
  31 import cz.msebera.android.httpclient.Header;
  32
  33 /**
  34  * Created by pk910 on 20.01.2016.
  35  */
  36 public abstract class IscRequestHelper {
  37
  38     protected void requestCalenderFromWeb(String url) {
  39         AsyncHttpClient client = new AsyncHttpClient();
  40         Log.i("HTTPClient", "Request: "+url);
  41         client.get(url, new AsyncHttpResponseHandler() {
  42             @Override
  43             public void onStart() {
  44             }
  45             @Override
  46             public void onSuccess(int statusCode, Header[] headers, byte[] response) {
  47                 String plainisc = new String(response);
  48                 // Google Calendar parse error!
  49                 plainisc = plainisc.replaceAll("(X-APPLE-TRAVEL-ADVISORY-BEHAVIOR;)?ACKNOWLEDGED[:=][0-9TZ]+(:AUTOMATIC)?[\\r\\n]*", "");
  50                 response = plainisc.getBytes();
  51
  52                 InputStream inputStream = new ByteArrayInputStream(response);
  53                 parseIsc(inputStream);
  54             }
  55             @Override
  56             public void onFailure(int statusCode, Header[] headers, byte[] errorResponse, Throwable e) {
  57                 String error = null;
  58                 try {
  59                     error = new String(errorResponse, "US-ASCII");
  60                 } catch (Exception e1) {
  61                 }
  62                 Log.i("HTTPClient", "  Error: " + statusCode + " - " + error);
  63                 onCalendarRequestFail(statusCode, error);
  64             }
  65             @Override
  66             public void onRetry(int retryNo) {
  67             }
  68         });
  69     }
  70
  71     private void parseIsc(InputStream input) {
  72         CalendarBuilder builder = new CalendarBuilder();
  73         Calendar calendar = null;
  74         try {
  75             calendar = builder.build(input);
  76         } catch (IOException e) {
  77             e.printStackTrace();
  78         } catch (ParserException e) {
  79             e.printStackTrace();
  80         }
  81         if(calendar == null)
  82             return;
  83         /*
  84         ComponentList events = calendar.getComponents(Component.VEVENT);
  85         ListIterator<Component> iterator = events.listIterator();
  86         while (iterator.hasNext()) {
  87             Component event = iterator.next();
  88             event.getProperties();
  89         }
  90         */
  91         onCalendarReceived(calendar);
  92     }
  93
  94     protected abstract void onCalendarReceived(Calendar calendar);
  95     protected abstract void onCalendarRequestFail(int statusCode, String errorMessage);
  96
  97 }