added waypoint group transfer event

common/src/main/java/journeymap/api/v2/common/event/CommonEventRegistry.java

@@ -4,6 +4,7 @@
 import journeymap.api.v2.client.IClientPlugin;
 import journeymap.api.v2.common.event.common.WaypointEvent;
 import journeymap.api.v2.common.event.common.WaypointGroupEvent;
+import journeymap.api.v2.common.event.common.WaypointGroupTransferEvent;
 import journeymap.api.v2.common.event.impl.Event;
 import journeymap.api.v2.common.event.impl.EventFactory;
 
@@ -25,4 +26,9 @@ public class CommonEventRegistry
      * This event handles all the CRUD operations of a waypoint groups on client and server.
      */
     public static final Event<WaypointGroupEvent> WAYPOINT_GROUP_EVENT = EventFactory.create(WaypointGroupEvent.class);
+
+    /**
+     * This event fires when a waypoint is transferred from one group to another, from may be null.
+     */
+    public static final Event<WaypointGroupTransferEvent> WAYPOINT_GROUP_TRANSFER_EVENT = EventFactory.create(WaypointGroupTransferEvent.class);
 }

common/src/main/java/journeymap/api/v2/common/event/common/WaypointGroupEvent.java

@@ -16,7 +16,7 @@ protected WaypointGroupEvent(WaypointGroup group, Context context)
     }
 
     /**
-     * Gets the waypoint that the event is handling.
+     * Gets the waypoint group that the event is handling.
      *
      * @return - The waypoint group.
      */

common/src/main/java/journeymap/api/v2/common/event/common/WaypointGroupTransferEvent.java

@@ -0,0 +1,54 @@
+package journeymap.api.v2.common.event.common;
+
+import journeymap.api.v2.common.event.impl.JourneyMapEvent;
+import journeymap.api.v2.common.waypoint.Waypoint;
+import journeymap.api.v2.common.waypoint.WaypointGroup;
+import org.jetbrains.annotations.Nullable;
+
+public class WaypointGroupTransferEvent extends JourneyMapEvent
+{
+    private final WaypointGroup to;
+    private final WaypointGroup from;
+    private final Waypoint waypoint;
+
+    protected WaypointGroupTransferEvent(@Nullable WaypointGroup from, WaypointGroup to, Waypoint waypoint)
+    {
+        super(true);
+        this.from = from;
+        this.to = to;
+        this.waypoint = waypoint;
+    }
+
+    /**
+     * The group the waypoint is transferring to.
+     *
+     * @return - The waypoint group.
+     */
+    public WaypointGroup getGroupTo()
+    {
+        return to;
+    }
+
+    /**
+     * The group the waypoint is transferring from.
+     * <p>
+     * May be null.
+     *
+     * @return - The waypoint group.
+     */
+    @Nullable
+    public WaypointGroup getGroupFrom()
+    {
+        return from;
+    }
+
+    /**
+     * Gets the waypoint that is transferring groups.
+     *
+     * @return - The waypoint group.
+     */
+    public Waypoint getWaypoint()
+    {
+        return waypoint;
+    }
+}