src/main/java/net/bionicmessage/objects/RecurrenceManager.java

   1 /*
   2  * Redistribution and use in source and binary forms, with or without modification, are
   3  * permitted provided that the following conditions are met:
   4  *
   5  *    1. Redistributions of source code must retain the above copyright notice, this list of
   6  *       conditions and the following disclaimer.
   7  *
   8  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
   9  *       of conditions and the following disclaimer in the documentation and/or other materials
  10  *       provided with the distribution.
  11  *
  12  * THIS SOFTWARE IS PROVIDED BY Mathew McBride ``AS IS'' AND ANY EXPRESS OR IMPLIED
  13  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  14  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR
  15  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  16  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  17  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  18  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  19  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  20  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  21  *
  22  * The views and conclusions contained in the software and documentation are those of the
  23  * authors and should not be interpreted as representing official policies, either expressed
  24  * or implied, of Mathew McBride.
  25  */
  26 package net.bionicmessage.objects;
  27
  28 import java.text.ParseException;
  29 import java.util.ArrayList;
  30 import java.util.List;
  31 import net.fortuna.ical4j.model.Calendar;
  32 import net.fortuna.ical4j.model.Component;
  33 import net.fortuna.ical4j.model.ComponentList;
  34 import net.fortuna.ical4j.model.Date;
  35 import net.fortuna.ical4j.model.property.ExDate;
  36 import net.fortuna.ical4j.model.property.RecurrenceId;
  37 import net.fortuna.ical4j.model.property.Uid;
  38
  39 /**
  40  *
  41  * @author matt
  42  */
  43 public class RecurrenceManager {
  44
  45     public static List<String> getDetatchedRecurrenceUids(Calendar c) {
  46         ArrayList<String> uids = new ArrayList();
  47         ComponentList clist = (ComponentList) c.getComponents(Component.VEVENT);
  48         for (int i = 0; i < clist.size(); i++) {
  49             Component occurance = (Component) clist.get(i);
  50             Uid ui = (Uid) occurance.getProperty(Uid.UID);
  51             if (occurance.getProperty(RecurrenceId.RECURRENCE_ID) != null) {
  52                 RecurrenceId rid = (RecurrenceId) occurance.getProperty(RecurrenceId.RECURRENCE_ID);
  53                 uids.add(rid.getValue());
  54             }
  55         }
  56         return uids;
  57     }
  58
  59     public static Calendar obtainStandaloneRecurrence(Calendar c, String recurrenceId) {
  60         ArrayList<String> uids = new ArrayList();
  61         ComponentList clist = (ComponentList) c.getComponents(Component.VEVENT);
  62         for (int i = 0; i < clist.size(); i++) {
  63             Component occurance = (Component) clist.get(i);
  64             Uid ui = (Uid) occurance.getProperty(Uid.UID);
  65             if (occurance.getProperty(RecurrenceId.RECURRENCE_ID) != null) {
  66                 RecurrenceId rid = (RecurrenceId) occurance.getProperty(RecurrenceId.RECURRENCE_ID);
  67                 // Correct the UID
  68                 ui.setValue(ui.getValue()+"-r"+recurrenceId);
  69                 occurance.getProperties().remove(ui);
  70                 occurance.getProperties().add(ui);
  71                 if (rid.getValue().equals(recurrenceId)) {
  72                     Calendar standalone = new Calendar();
  73                     standalone.getComponents().add(occurance);
  74                     return standalone;
  75                 }
  76             }
  77         }
  78         return null;
  79     }
  80
  81     public static ExDate getExdateForCalendar(Calendar c, ExDate exd) {
  82         ArrayList<Date> detatchedDates = new ArrayList();
  83         ComponentList clist = (ComponentList) c.getComponents(Component.VEVENT);
  84         for (int i = 0; i < clist.size(); i++) {
  85             Component occurance = (Component) clist.get(i);
  86             if (occurance.getProperty(RecurrenceId.RECURRENCE_ID) != null) {
  87                 RecurrenceId rid = (RecurrenceId) occurance.getProperty(RecurrenceId.RECURRENCE_ID);
  88                 detatchedDates.add(rid.getDate());
  89             }
  90         }
  91         for (Date d : detatchedDates) {
  92             exd.getDates().add(d);
  93         }
  94         return exd;
  95     }
  96
  97     public static Calendar obtainMasterEvent(Calendar c) {
  98         ComponentList clist = (ComponentList) c.getComponents(Component.VEVENT);
  99         for (int i = 0; i < clist.size(); i++) {
 100             Component occurance = (Component) clist.get(i);
 101             if (occurance.getProperty(RecurrenceId.RECURRENCE_ID) == null) {
 102                 Calendar cm = new Calendar();
 103                 // Add the changed exdate
 104                 ExDate exd = (ExDate) occurance.getProperty(ExDate.EXDATE);
 105                 if (exd == null)
 106                     exd = new ExDate();
 107                 else
 108                     occurance.getProperties().remove(exd);
 109                 getExdateForCalendar(c, exd);
 110                 occurance.getProperties().add(exd);
 111                 cm.getComponents().add(occurance);
 112                 return cm;
 113             }
 114         }
 115         return null;
 116     }
 117     public static Calendar mergeRecurrenceChange(Calendar master, Calendar recurrence, String masterUID, String recurrenceId) throws ParseException {
 118        ComponentList clist = (ComponentList) master.getComponents(Component.VEVENT);
 119        Calendar merged = master;
 120         for (int i = 0; i < clist.size(); i++) {
 121             Component occurance = (Component) clist.get(i);
 122             if (occurance.getProperty(RecurrenceId.RECURRENCE_ID) != null
 123                     && ((RecurrenceId)occurance.getProperty(RecurrenceId.RECURRENCE_ID)).getValue().equals(recurrenceId)) {
 124                 merged.getComponents().remove(occurance);
 125                 Component replacementOccurance = recurrence.getComponent(Component.VEVENT);
 126                 // Delete the UID and replace it with the master
 127                 Uid uid = (Uid) replacementOccurance.getProperty(Uid.UID);
 128                 replacementOccurance.getProperties().remove(uid);
 129                 uid.setValue(masterUID);
 130                 replacementOccurance.getProperties().add(uid);
 131
 132                 RecurrenceId recurId = (RecurrenceId) replacementOccurance.getProperty(RecurrenceId.RECURRENCE_ID);
 133                 if (recurId != null) {
 134                     replacementOccurance.getProperties().remove(recurId);
 135                 }
 136                 recurId = new RecurrenceId(recurrenceId);
 137                 replacementOccurance.getProperties().add(recurId);
 138                 merged.getComponents().add(replacementOccurance);
 139                 break;
 140             }
 141         }
 142        return merged;
 143     }
 144 }