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

   1 package de.dhbwloe.campusapp.network;
   2
   3 import android.util.Log;
   4
   5 import com.loopj.android.http.AsyncHttpClient;
   6 import com.loopj.android.http.AsyncHttpResponseHandler;
   7
   8 import net.fortuna.ical4j.data.CalendarBuilder;
   9 import net.fortuna.ical4j.data.ParserException;
  10 import net.fortuna.ical4j.model.Calendar;
  11
  12 import java.io.ByteArrayInputStream;
  13 import java.io.IOException;
  14 import java.io.InputStream;
  15 import java.io.UnsupportedEncodingException;
  16
  17 import cz.msebera.android.httpclient.Header;
  18
  19 /**
  20  * Created by pk910 on 20.01.2016.
  21  */
  22 public abstract class IscRequestHelper {
  23
  24     protected void requestCalenderFromWeb(String url) {
  25         AsyncHttpClient client = new AsyncHttpClient();
  26         Log.i("HTTPClient", "Request: "+url);
  27         client.get(url, new AsyncHttpResponseHandler() {
  28             @Override
  29             public void onStart() {
  30             }
  31             @Override
  32             public void onSuccess(int statusCode, Header[] headers, byte[] response) {
  33                 String plainisc = new String(response);
  34                 // Google Calendar parse error!
  35                 plainisc = plainisc.replaceAll("(X-APPLE-TRAVEL-ADVISORY-BEHAVIOR;)?ACKNOWLEDGED[:=][0-9TZ]+(:AUTOMATIC)?[\\r\\n]*", "");
  36                 response = plainisc.getBytes();
  37
  38                 InputStream inputStream = new ByteArrayInputStream(response);
  39                 parseIsc(inputStream);
  40             }
  41             @Override
  42             public void onFailure(int statusCode, Header[] headers, byte[] errorResponse, Throwable e) {
  43                 String error = null;
  44                 try {
  45                     error = new String(errorResponse, "US-ASCII");
  46                 } catch (UnsupportedEncodingException e1) {
  47                 }
  48                 Log.i("HTTPClient", "  Error: " + statusCode + " - " + error);
  49                 onCalendarRequestFail(statusCode, error);
  50             }
  51             @Override
  52             public void onRetry(int retryNo) {
  53             }
  54         });
  55     }
  56
  57     private void parseIsc(InputStream input) {
  58         CalendarBuilder builder = new CalendarBuilder();
  59         Calendar calendar = null;
  60         try {
  61             calendar = builder.build(input);
  62         } catch (IOException e) {
  63             e.printStackTrace();
  64         } catch (ParserException e) {
  65             e.printStackTrace();
  66         }
  67         if(calendar == null)
  68             return;
  69         /*
  70         ComponentList events = calendar.getComponents(Component.VEVENT);
  71         ListIterator<Component> iterator = events.listIterator();
  72         while (iterator.hasNext()) {
  73             Component event = iterator.next();
  74             event.getProperties();
  75         }
  76         */
  77         onCalendarReceived(calendar);
  78     }
  79
  80     protected abstract void onCalendarReceived(Calendar calendar);
  81     protected abstract void onCalendarRequestFail(int statusCode, String errorMessage);
  82
  83 }