Added DeluxeMenusOpenMenuEvent and DeluxeMenusPreOpenMenuEvent

src/main/java/com/extendedclip/deluxemenus/events/DeluxeMenusOpenMenuEvent.java

@@ -0,0 +1,31 @@
+package com.extendedclip.deluxemenus.events;
+
+import com.extendedclip.deluxemenus.menu.Menu;
+import com.extendedclip.deluxemenus.menu.MenuHolder;
+import org.bukkit.entity.Player;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.player.PlayerEvent;
+import org.jetbrains.annotations.NotNull;
+
+public class DeluxeMenusOpenMenuEvent extends PlayerEvent {
+    private static final HandlerList HANDLERS = new HandlerList();
+    private final MenuHolder holder;
+
+    public DeluxeMenusOpenMenuEvent(Player player, MenuHolder holder) {
+        super(player);
+        this.holder = holder;
+    }
+
+    public MenuHolder getHolder() {
+        return holder;
+    }
+
+    public static HandlerList getHandlerList() {
+        return HANDLERS;
+    }
+
+    @Override
+    public @NotNull HandlerList getHandlers() {
+        return HANDLERS;
+    }
+}

src/main/java/com/extendedclip/deluxemenus/events/DeluxeMenusPreOpenMenuEvent.java

@@ -0,0 +1,37 @@
+package com.extendedclip.deluxemenus.events;
+
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.player.PlayerEvent;
+import org.jetbrains.annotations.NotNull;
+
+public class DeluxeMenusPreOpenMenuEvent extends PlayerEvent implements Cancellable {
+    private static final HandlerList HANDLERS = new HandlerList();
+
+    private boolean cancelled = false;
+
+    public DeluxeMenusPreOpenMenuEvent(Player player) {
+        super(player);
+    }
+
+    public static HandlerList getHandlerList() {
+        return HANDLERS;
+    }
+
+    @Override
+    public @NotNull HandlerList getHandlers() {
+        return HANDLERS;
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean b) {
+        this.cancelled = b;
+    }
+}
+

src/main/java/com/extendedclip/deluxemenus/menu/Menu.java

@@ -3,6 +3,8 @@
 import com.extendedclip.deluxemenus.DeluxeMenus;
 import com.extendedclip.deluxemenus.action.ClickHandler;
 import com.extendedclip.deluxemenus.dupe.MenuItemMarker;
+import com.extendedclip.deluxemenus.events.DeluxeMenusOpenMenuEvent;
+import com.extendedclip.deluxemenus.events.DeluxeMenusPreOpenMenuEvent;
 import com.extendedclip.deluxemenus.requirement.RequirementList;
 import com.extendedclip.deluxemenus.utils.DebugLevel;
 import com.extendedclip.deluxemenus.utils.StringUtils;
@@ -371,6 +373,11 @@ public void openMenu(final Player viewer, final Map<String, String> args, final
       return;
     }
 
+    DeluxeMenusPreOpenMenuEvent preOpenEvent = new DeluxeMenusPreOpenMenuEvent(viewer);
+    Bukkit.getPluginManager().callEvent(preOpenEvent);
+
+    if (preOpenEvent.isCancelled()) return;
+
     final MenuHolder holder = new MenuHolder(viewer);
     if (placeholderPlayer != null) {
       holder.setPlaceholderPlayer(placeholderPlayer);
@@ -488,6 +495,11 @@ public void openMenu(final Player viewer, final Map<String, String> args, final
           holder.startUpdatePlaceholdersTask();
         }
       });
+
+      Bukkit.getScheduler().runTask(DeluxeMenus.getInstance(), () -> {
+        DeluxeMenusOpenMenuEvent openEvent = new DeluxeMenusOpenMenuEvent(viewer, holder);
+        Bukkit.getPluginManager().callEvent(openEvent);
+      });
     });
   }