app/src/main/java/de/dhbwloe/campusapp/vorlesungen/CalendarManager.java

   1 package de.dhbwloe.campusapp.vorlesungen;
   2
   3
   4 import android.util.Log;
   5
   6 import net.fortuna.ical4j.model.Calendar;
   7 import net.fortuna.ical4j.model.Component;
   8 import net.fortuna.ical4j.model.Property;
   9
  10 import java.text.DateFormat;
  11 import java.text.ParseException;
  12 import java.text.SimpleDateFormat;
  13 import java.util.ArrayList;
  14 import java.util.Date;
  15 import java.util.ListIterator;
  16 import java.util.Locale;
  17
  18 import de.dhbwloe.campusapp.CampusAppContext;
  19 import de.dhbwloe.campusapp.network.IscRequestHelper;
  20 import de.dhbwloe.campusapp.search.SearchIndices;
  21
  22 /**
  23  * Created by pk910 on 19.01.2016.
  24  */
  25 public class CalendarManager extends IscRequestHelper {
  26     private static final String[][] PLAN_SOURCES = {
  27             {"STUV", "https://www.google.com/calendar/ical/asta.dhbw.de_c0g35t6hrh16kr4ankrqg2rdm4%40group.calendar.google.com/public/basic.ics"},
  28     };
  29
  30     private CampusAppContext AppContext;
  31     private boolean bRequestRunning = false;
  32     private boolean bFastSynchronisation = false;
  33     private String sCourseName;
  34     private String source[];
  35     private ArrayList<CalendarManagerInterface> aCallbackInterfaces = new ArrayList<CalendarManagerInterface>();
  36
  37     public CalendarManager(CampusAppContext context, String courseName) {
  38         AppContext = context;
  39         sCourseName = courseName;
  40
  41         for(String src[] : PLAN_SOURCES) {
  42             if(src[0].equalsIgnoreCase(courseName)) {
  43                 source = src;
  44                 break;
  45             }
  46         }
  47     }
  48
  49     public void performFastSynchronisation(CalendarManagerInterface callback) {
  50         performSynchronisation(callback, false);
  51     }
  52
  53     public void performFullSynchronisation(CalendarManagerInterface callback) {
  54         performSynchronisation(callback, true);
  55     }
  56
  57     private void performSynchronisation(CalendarManagerInterface callback, boolean fullsync) {
  58         if(sCourseName.length() == 0) {
  59             callback.onCalendarUpdateFail("no course name");
  60             return;
  61         }
  62
  63         aCallbackInterfaces.add(callback);
  64         if(bRequestRunning)
  65             return;
  66
  67         bFastSynchronisation = !fullsync;
  68         bRequestRunning = true;
  69         String courseCalendarUrl;
  70         if(source == null) {
  71             courseCalendarUrl = "https://webmail.dhbw-loerrach.de/owa/calendar/kal-" + sCourseName + "@dhbw-loerrach.de/Kalender/calendar.ics";
  72         } else {
  73             courseCalendarUrl = source[1];
  74         }
  75         requestCalenderFromWeb(courseCalendarUrl);
  76     }
  77
  78     @Override
  79     protected void onCalendarReceived(Calendar calendar) {
  80         long timeFrom, timeTo;
  81         long now = (new Date()).getTime() / 1000;
  82         if(bFastSynchronisation) {
  83             timeFrom = now - (86400 * 5);
  84             timeTo = now + (86400 * 7 * 4);
  85         } else {
  86             timeFrom = now - (86400 * 365 * 3);
  87             timeTo = now + (86400 * 365 * 4);
  88         }
  89         CourseEvent[] events = AppContext.getDatabaseManager().getCourseCalendarEvents(sCourseName, timeFrom, timeTo);
  90         Log.i("CMSync", "Event count: " + events.length);
  91         ArrayList<CourseEvent> newEvents = new ArrayList<CourseEvent>();
  92         ArrayList<SearchIndices> newIndices = new ArrayList<SearchIndices>();
  93         int lastEventIndex = 0;
  94         ListIterator cIterator = calendar.getComponents().listIterator();
  95
  96         while (cIterator.hasNext()) {
  97             Component event = (Component)cIterator.next();
  98             CourseEvent dbEvent;
  99             Property prop;
 100
 101             prop = event.getProperty("UID");
 102             String uid;
 103             if(prop != null)
 104                 uid = prop.getValue();
 105             else
 106                 continue;
 107
 108             prop = event.getProperty("SEQUENCE");
 109             int sequence;
 110             if(prop != null)
 111                 sequence = Integer.parseInt(prop.getValue());
 112             else
 113                 sequence = 1;
 114
 115             long startTime = 0, endTime = 0;
 116             prop = event.getProperty("DTSTART");
 117             if(prop != null)
 118                 startTime = getTimeFromTimestamp(prop.getValue());
 119             else
 120                 Log.i("CMSync", "Parse Event: DTSTART not found!");
 121
 122             prop = event.getProperty("DTEND");
 123             if(prop != null)
 124                 endTime = getTimeFromTimestamp(prop.getValue());
 125             else
 126                 Log.i("CMSync", "Parse Event: DTEND not found!");
 127
 128             if(!(endTime > timeFrom && startTime < timeTo)) {
 129                 Log.i("CMSync", "Skip Entry: ("+timeFrom+" - "+timeTo+")   Filter: "+startTime+" - "+endTime);
 130                 continue;
 131             }
 132
 133             dbEvent = null;
 134             for(int i = lastEventIndex; i < events.length; i++) {
 135                 if(events[i].getUniqueId().equalsIgnoreCase(uid)) {
 136                     dbEvent = events[i];
 137                     break;
 138                 }
 139             }
 140             if(dbEvent == null && lastEventIndex > 0) {
 141                 for(int i = 0; i < lastEventIndex; i++) {
 142                     if(events[i].getUniqueId().equalsIgnoreCase(uid)) {
 143                         dbEvent = events[i];
 144                         break;
 145                     }
 146                 }
 147             }
 148             if(dbEvent == null) {
 149                 for(CourseEvent cevent : newEvents) {
 150                     if(cevent.getUniqueId().equalsIgnoreCase(uid)) {
 151                         dbEvent = cevent;
 152                         break;
 153                     }
 154                 }
 155             }
 156
 157             if(dbEvent == null) {
 158                 // new event!
 159                 Log.i("CMSync", "New Event "+uid);
 160                 dbEvent = new CourseEvent(sCourseName, uid, sequence, true);
 161                 newEvents.add(dbEvent);
 162             } else {
 163                 Log.i("CMSync", "Existing Event "+uid+" ("+dbEvent.getSequenceId()+" >= "+sequence+")");
 164                 if(dbEvent.getSequenceId() >= sequence) {
 165                     continue; // skip event
 166                 }
 167                 dbEvent.setSequenceId(sequence);
 168             }
 169             // perform update
 170             prop = event.getProperty("SUMMARY");
 171             if(prop != null)
 172                 dbEvent.setEventTitle(prop.getValue());
 173             else
 174                 Log.i("CMSync", "Parse Event: SUMMARY not found!");
 175
 176             dbEvent.setEventFrom(startTime);
 177             dbEvent.setEventTo(endTime);
 178
 179             prop = event.getProperty("LOCATION");
 180             if(prop != null)
 181                 dbEvent.setEventLocation(prop.getValue());
 182             else
 183                 Log.i("CMSync", "Parse Event: LOCATION not found!");
 184
 185             prop = event.getProperty("STATUS");
 186             if(prop != null)
 187                 dbEvent.setEventStatus(prop.getValue());
 188             else
 189                 Log.i("CMSync", "Parse Event: STATUS not found!");
 190
 191             prop = event.getProperty("RRULE");
 192             if(prop != null)
 193                 dbEvent.setRecurRule(prop.getValue());
 194             else
 195                 dbEvent.setRecurRule("");
 196
 197             prop = event.getProperty("EXDATE");
 198             if(prop != null)
 199                 dbEvent.setExcludeDates(prop.getValue());
 200             else
 201                 dbEvent.setExcludeDates("");
 202
 203             CourseGroup group = CourseGroup.GetCourseGroupByName(AppContext.getDatabaseManager(), sCourseName, dbEvent.getGroupTitle().trim());
 204             if(group != null)
 205                 dbEvent.setCourseGroup(group);
 206
 207             if(group.isNewGroup(true)) {
 208                 for(CalendarManagerInterface callback : aCallbackInterfaces) {
 209                     SearchIndices indices = callback.onGenerateCalendarSearchIndices(dbEvent);
 210                     if(indices != null) {
 211                         newIndices.add(indices);
 212                     }
 213                 }
 214             }
 215
 216             dbEvent.update(AppContext.getDatabaseManager());
 217             Log.i("CMSync", "Update Event: "+dbEvent.getUniqueId());
 218         }
 219
 220         SearchIndices[] newIndicesArr = new SearchIndices[newIndices.size()];
 221         newIndicesArr = newIndices.toArray(newIndicesArr);
 222         AppContext.addSearchIndices(newIndicesArr);
 223
 224         for(CalendarManagerInterface callback : aCallbackInterfaces) {
 225             callback.onCalendarUpdateDone();
 226         }
 227         aCallbackInterfaces.clear();
 228         bRequestRunning = false;
 229     }
 230
 231     private long getTimeFromTimestamp(String timestamp) {
 232         // 20160425T090000
 233         // 20160321
 234         DateFormat df = new SimpleDateFormat("yyyyMMdd'T'kkmmss", Locale.ENGLISH);
 235         try {
 236             Date result =  df.parse(timestamp);
 237             return result.getTime()/1000;
 238         } catch (ParseException e) {
 239             df = new SimpleDateFormat("yyyyMMdd", Locale.ENGLISH);
 240             try {
 241                 Date result =  df.parse(timestamp);
 242                 return result.getTime()/1000;
 243             } catch (ParseException e2) {
 244                 Log.i("CMSync", "Failed parsing: "+timestamp);
 245                 return 0;
 246             }
 247         }
 248     }
 249
 250     @Override
 251     protected void onCalendarRequestFail(int statusCode, String errorMessage) {
 252         Log.i("CMSync", "Calendar Error: "+statusCode);
 253         for(CalendarManagerInterface callback : aCallbackInterfaces) {
 254             callback.onCalendarUpdateFail("error " + statusCode + ": " + errorMessage);
 255         }
 256         aCallbackInterfaces.clear();
 257         bRequestRunning = false;
 258     }
 259 }