Fix PlotDeleteEvent and PlotMergeEvent not being called.

Replaced current PlotMergeEvent with PlotAutoMergeEvent (called when a plot is merged on /plot auto). And made PlotMergeEvent be called for /plot merge command.

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/events/PlotAutoMergeEvent.java

@@ -0,0 +1,56 @@
+package com.github.intellectualsites.plotsquared.bukkit.events;
+
+import com.github.intellectualsites.plotsquared.plot.object.Plot;
+import com.github.intellectualsites.plotsquared.plot.object.PlotId;
+import lombok.Getter;
+import lombok.Setter;
+import org.bukkit.World;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
+
+import javax.annotation.Nonnull;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Event called when plots are automatically merged with /plot auto
+ * {@inheritDoc}
+ */
+public final class PlotAutoMergeEvent extends PlotEvent implements Cancellable {
+
+    private static final HandlerList handlers = new HandlerList();
+    private final List<PlotId> plots;
+    @Getter private final World world;
+    @Getter @Setter private boolean cancelled;
+
+    /**
+     * PlotAutoMergeEvent: Called when plots are automatically merged with /plot auto
+     *
+     * @param world World in which the event occurred
+     * @param plot  Plot that was merged
+     * @param plots A list of plots involved in the event
+     */
+    public PlotAutoMergeEvent(@Nonnull final World world, @Nonnull final Plot plot,
+        @Nonnull final List<PlotId> plots) {
+        super(plot);
+        this.world = world;
+        this.plots = plots;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+
+    /**
+     * Get the plots being added.
+     *
+     * @return Unmodifiable list containing the merging plots
+     */
+    public List<PlotId> getPlots() {
+        return Collections.unmodifiableList(this.plots);
+    }
+
+    @Override public HandlerList getHandlers() {
+        return handlers;
+    }
+}

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/events/PlotDeleteEvent.java

@@ -2,14 +2,16 @@ package com.github.intellectualsites.plotsquared.bukkit.events;
 
 import com.github.intellectualsites.plotsquared.plot.object.Plot;
 import com.github.intellectualsites.plotsquared.plot.object.PlotId;
+import org.bukkit.event.Cancellable;
 import org.bukkit.event.HandlerList;
 
 /**
  * Called when a plot is deleted
  */
-public class PlotDeleteEvent extends PlotEvent {
+public class PlotDeleteEvent extends PlotEvent implements Cancellable {
 
     private static final HandlerList handlers = new HandlerList();
+    private boolean cancelled;
 
     public PlotDeleteEvent(Plot plot) {
         super(plot);
@@ -20,7 +22,7 @@ public class PlotDeleteEvent extends PlotEvent {
     }
 
     /**
-     * Get the PlotId
+     * Get the PlotId.
      *
      * @return PlotId
      */
@@ -29,7 +31,7 @@ public class PlotDeleteEvent extends PlotEvent {
     }
 
     /**
-     * Get the world name
+     * Get the world name.
      *
      * @return String
      */
@@ -40,4 +42,12 @@ public class PlotDeleteEvent extends PlotEvent {
     @Override public HandlerList getHandlers() {
         return handlers;
     }
+
+    @Override public boolean isCancelled() {
+        return this.cancelled;
+    }
+
+    @Override public void setCancelled(boolean b) {
+        this.cancelled = b;
+    }
 }

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/events/PlotMergeEvent.java

@@ -1,7 +1,6 @@
 package com.github.intellectualsites.plotsquared.bukkit.events;
 
 import com.github.intellectualsites.plotsquared.plot.object.Plot;
-import com.github.intellectualsites.plotsquared.plot.object.PlotId;
 import lombok.Getter;
 import lombok.Setter;
 import org.bukkit.World;
@@ -9,8 +8,6 @@ import org.bukkit.event.Cancellable;
 import org.bukkit.event.HandlerList;
 
 import javax.annotation.Nonnull;
-import java.util.Collections;
-import java.util.List;
 
 /**
  * Event called when several plots are merged
@@ -19,7 +16,8 @@ import java.util.List;
 public final class PlotMergeEvent extends PlotEvent implements Cancellable {
 
     private static final HandlerList handlers = new HandlerList();
-    private final List<PlotId> plots;
+    @Getter private final int dir;
+    @Getter private final int max;
     @Getter private final World world;
     @Getter @Setter private boolean cancelled;
 
@@ -28,28 +26,21 @@ public final class PlotMergeEvent extends PlotEvent implements Cancellable {
      *
      * @param world World in which the event occurred
      * @param plot  Plot that was merged
-     * @param plots A list of plots involved in the event
+     * @param dir   The direction of the merge
+     * @param max   Max merge size
      */
     public PlotMergeEvent(@Nonnull final World world, @Nonnull final Plot plot,
-        @Nonnull final List<PlotId> plots) {
+        @Nonnull final int dir, @Nonnull final int max) {
         super(plot);
         this.world = world;
-        this.plots = plots;
+        this.dir = dir;
+        this.max = max;
     }
 
     public static HandlerList getHandlerList() {
         return handlers;
     }
 
-    /**
-     * Get the plots being added.
-     *
-     * @return Unmodifiable list containing the merging plots
-     */
-    public List<PlotId> getPlots() {
-        return Collections.unmodifiableList(this.plots);
-    }
-
     @Override public HandlerList getHandlers() {
         return handlers;
     }

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/util/BukkitEventUtil.java

@@ -48,8 +48,8 @@ public final class BukkitEventUtil extends EventUtil {
         return callEvent(new PlotClearEvent(plot));
     }
 
-    @Override public void callDelete(Plot plot) {
-        callEvent(new PlotDeleteEvent(plot));
+    @Override public boolean callDelete(Plot plot) {
+        return callEvent(new PlotDeleteEvent(plot));
     }
 
     @Override public boolean callFlagAdd(Flag flag, Plot plot) {
@@ -60,8 +60,12 @@ public final class BukkitEventUtil extends EventUtil {
         return callEvent(new PlotFlagRemoveEvent(flag, plot));
     }
 
-    @Override public boolean callMerge(Plot plot, List<PlotId> plots) {
-        return callEvent(new PlotMergeEvent(BukkitUtil.getWorld(plot.getWorldName()), plot, plots));
+    @Override public boolean callMerge(Plot plot, int dir, int max) {
+        return callEvent(new PlotMergeEvent(BukkitUtil.getWorld(plot.getWorldName()), plot, dir, max));
+    }
+
+    @Override public boolean callAutoMerge(Plot plot, List<PlotId> plots) {
+        return callEvent(new PlotAutoMergeEvent(BukkitUtil.getWorld(plot.getWorldName()), plot, plots));
     }
 
     @Override public boolean callUnlink(PlotArea area, List<PlotId> plots) {

Core/src/main/java/com/github/intellectualsites/plotsquared/plot/object/Plot.java

@@ -791,9 +791,18 @@ public class Plot {
     }
 
     public boolean clear(boolean checkRunning, final boolean isDelete, final Runnable whenDone) {
-        if (checkRunning && this.getRunning() != 0 || !EventUtil.manager.callClear(this)) {
+        if (checkRunning && this.getRunning() != 0) {
             return false;
         }
+        if (isDelete) {
+            if(!EventUtil.manager.callDelete(this)) {
+                return false;
+            }
+        } else {
+            if(!EventUtil.manager.callClear(this)) {
+                return false;
+            }
+        }
         final HashSet<RegionWrapper> regions = this.getRegions();
         final Set<Plot> plots = this.getConnectedPlots();
         final ArrayDeque<Plot> queue = new ArrayDeque<>(plots);
@@ -2156,6 +2165,9 @@ public class Plot {
         if (this.owner == null) {
             return false;
         }
+        if(!EventUtil.manager.callMerge(this, dir, max)) {
+            return false;
+        }
         HashSet<Plot> visited = new HashSet<>();
         HashSet<PlotId> merged = new HashSet<>();
         Set<Plot> connected = this.getConnectedPlots();

Core/src/main/java/com/github/intellectualsites/plotsquared/plot/object/PlotArea.java

@@ -808,7 +808,7 @@ public abstract class PlotArea {
         final PlotId pos2 = plotIds.get(plotIds.size() - 1);
         final PlotManager manager = getPlotManager();
 
-        final boolean result = EventUtil.manager.callMerge(getPlotAbs(pos1), plotIds);
+        final boolean result = EventUtil.manager.callAutoMerge(getPlotAbs(pos1), plotIds);
         if (!result) {
             return false;
         }

Core/src/main/java/com/github/intellectualsites/plotsquared/plot/util/EventUtil.java

@@ -37,7 +37,7 @@ public abstract class EventUtil {
 
     public abstract boolean callClear(Plot plot);
 
-    public abstract void callDelete(Plot plot);
+    public abstract boolean callDelete(Plot plot);
 
     public abstract boolean callFlagAdd(Flag flag, Plot plot);
 
@@ -45,7 +45,9 @@ public abstract class EventUtil {
 
     public abstract boolean callFlagRemove(Flag<?> flag, Object value, PlotCluster cluster);
 
-    public abstract boolean callMerge(Plot plot, List<PlotId> plots);
+    public abstract boolean callMerge(Plot plot, int dir, int max);
+
+    public abstract boolean callAutoMerge(Plot plot, List<PlotId> plots);
 
     public abstract boolean callUnlink(PlotArea area, List<PlotId> plots);
 

Core/src/test/java/com/github/intellectualsites/plotsquared/plot/util/EventUtilTest.java

@@ -28,7 +28,8 @@ public class EventUtilTest extends EventUtil {
         return false;
     }
 
-    @Override public void callDelete(Plot plot) {
+    @Override public boolean callDelete(Plot plot) {
+        return false;
     }
 
     @Override public boolean callFlagAdd(Flag flag, Plot plot) {
@@ -43,7 +44,11 @@ public class EventUtilTest extends EventUtil {
         return true;
     }
 
-    @Override public boolean callMerge(Plot plot, List<PlotId> plots) {
+    @Override public boolean callMerge(Plot plot, int dir, int max){
+        return false;
+    }
+
+    @Override public boolean callAutoMerge(Plot plot, List<PlotId> plots) {
         return false;
     }