4 files changed, 81 insertions, 1 deletions

diff --git a/libkcal/calendar.cpp b/libkcal/calendar.cpp
index a662eeb..b7990d4 100644
--- a/libkcal/calendar.cpp
+++ b/libkcal/calendar.cpp
@@ -359,9 +359,10 @@ void Calendar::addIncidenceBranch(Incidence *i)
 
 bool Calendar::addIncidence(Incidence *i)
 {
   Incidence::AddVisitor<Calendar> v(this);
-  i->setCalID( mDefaultCalendar );
+  if ( i->calID() == 0 )
+      i->setCalID( mDefaultCalendar );
   i->setCalEnabled( true );
   return i->accept(v);
 }
 void Calendar::deleteIncidence(Incidence *in)
diff --git a/libkcal/calendar.h b/libkcal/calendar.h
index 4652fe5..14a1a45 100644
--- a/libkcal/calendar.h
+++ b/libkcal/calendar.h
@@ -75,8 +75,9 @@ public:
     */
     virtual void close() = 0;
     virtual void addCalendar( Calendar*  ) = 0;
     virtual bool addCalendarFile( QString name, int id ) = 0;
+    virtual bool mergeCalendarFile( QString name ) = 0;
     virtual void setSyncEventsReadOnly() = 0;
     virtual void stopAllTodos() = 0;
   
     /**
diff --git a/libkcal/calendarlocal.cpp b/libkcal/calendarlocal.cpp
index cce798f..3e42ec0 100644
--- a/libkcal/calendarlocal.cpp
+++ b/libkcal/calendarlocal.cpp
@@ -67,8 +67,83 @@ CalendarLocal::~CalendarLocal()
 {
     if ( mDeleteIncidencesOnClose )
         close();
 }
+bool CalendarLocal::mergeCalendarFile( QString name )
+{
+    CalendarLocal calendar( timeZoneId() );
+    calendar.setDefaultCalendar( 1 );
+    if ( calendar.load( name ) ) {
+        mergeCalendar( &calendar  );
+        return true;
+    }
+    return false;
+}
+ 
+Incidence* CalendarLocal::incidenceForUid( const QString& uid )
+{
+    Todo *todo;;
+    Incidence *retVal = 0;
+    for ( todo = mTodoList.first(); todo; todo = mTodoList.next() ) {
+        if ( todo->uid() == uid ) {
+            if ( retVal ) {
+                if ( retVal->calID() > todo->calID() ) {
+                    retVal = todo;
+                }
+            } else {
+                retVal = todo;
+            }
+        } 
+    }
+    if ( retVal ) return retVal;
+    Event *event;
+    for ( event = mEventList.first(); event; event = mEventList.next() ) {
+        if (  event->uid() == uid ) {
+            if ( retVal ) {
+                if ( retVal->calID() > event->calID() ) {
+                    retVal = event;
+                }
+            } else {
+                retVal = event;
+            }
+        }
+    }
+    if ( retVal ) return retVal;
+    for ( Journal *it = mJournalList.first(); it; it = mJournalList.next() )
+        if ( it->uid() == uid ) {
+            if ( retVal ) {
+                if ( retVal->calID() > it->calID() ) {
+                    retVal = it;
+                }
+            } else {
+                retVal = it;
+            }
+        }
+    return retVal;
+}
+
+bool CalendarLocal::mergeCalendar( Calendar* remote  )
+{
+    QPtrList<Incidence> er = remote->rawIncidences(); 
+    Incidence* inR = er.first();
+    Incidence* inL; 
+    while ( inR ) {
+        inL = incidenceForUid( inR->uid() );
+        if ( inL ) {
+            int calID = inL->calID();
+            deleteIncidence( inL );
+            inL = inR->clone();
+            inL->setCalID( calID );
+            addIncidence( inL );
+        } else {
+            inL = inR->clone();
+            inL->setCalID( 0 );// add to default cal
+            addIncidence( inL );
+        }
+        inR = er.next();
+    }
+    return true;
+}
 bool CalendarLocal::addCalendarFile( QString name, int id )
 {
     CalendarLocal calendar( timeZoneId() );
     calendar.setDefaultCalendar( id );
diff --git a/libkcal/calendarlocal.h b/libkcal/calendarlocal.h
index 98d16a3..23b0542 100644
--- a/libkcal/calendarlocal.h
+++ b/libkcal/calendarlocal.h
@@ -44,8 +44,11 @@ class CalendarLocal : public Calendar
     CalendarLocal( const QString &timeZoneId );
     ~CalendarLocal();
     void addCalendar( Calendar*  );
     bool addCalendarFile( QString name, int id );
+    bool mergeCalendarFile( QString name );
+    bool mergeCalendar( Calendar* cal );
+    Incidence* incidenceForUid( const QString& uid );
     void setSyncEventsReadOnly();
     void stopAllTodos();
     /**
       Loads a calendar on disk in vCalendar or iCalendar format into the current