Added PlayerPermissionChangedEvent(#8023)

src/main/java/net/minecraftforge/event/ForgeEventFactory.java

@@ -26,9 +26,11 @@ import java.util.function.Consumer;
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 
+import com.mojang.authlib.GameProfile;
 import com.mojang.blaze3d.vertex.PoseStack;
 
 import com.mojang.brigadier.CommandDispatcher;
+import net.minecraft.server.players.PlayerList;
 import net.minecraft.world.entity.projectile.FireworkRocketEntity;
 import net.minecraft.world.entity.projectile.Projectile;
 import net.minecraft.world.entity.projectile.ThrownEnderpearl;
@@ -121,6 +123,7 @@ import net.minecraftforge.event.entity.player.BonemealEvent;
 import net.minecraftforge.event.entity.player.EntityItemPickupEvent;
 import net.minecraftforge.event.entity.player.FillBucketEvent;
 import net.minecraftforge.event.entity.player.ItemTooltipEvent;
+import net.minecraftforge.event.entity.player.PermissionsChangedEvent;
 import net.minecraftforge.event.entity.player.PlayerDestroyItemEvent;
 import net.minecraftforge.event.entity.player.PlayerEvent;
 import net.minecraftforge.event.entity.player.PlayerFlyableFallEvent;
@@ -782,4 +785,15 @@ public class ForgeEventFactory
         MinecraftForge.EVENT_BUS.post(event);
         return event;
     }
+
+    public static boolean onPermissionChanged(GameProfile gameProfile, int newLevel, PlayerList playerList)
+    {
+        int oldLevel = playerList.getServer().getProfilePermissions(gameProfile);
+        ServerPlayer player = playerList.getPlayer(gameProfile.getId());
+        if (newLevel != oldLevel && player != null)
+        {
+            return MinecraftForge.EVENT_BUS.post(new PermissionsChangedEvent(player, newLevel, oldLevel));
+        }
+        return true;
+    }
 }

src/main/java/net/minecraftforge/event/entity/player/PermissionsChangedEvent.java

@@ -0,0 +1,57 @@
+/*
+ * Minecraft Forge
+ * Copyright (c) 2016-2021.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+package net.minecraftforge.event.entity.player;
+
+import net.minecraft.server.level.ServerPlayer;
+import net.minecraftforge.eventbus.api.Cancelable;
+
+/**
+ * This event will fire when the player is opped or deopped.
+ * <p>
+ * This event is cancelable which will stop the op or deop from happening.
+ */
+@Cancelable
+public class PermissionsChangedEvent extends PlayerEvent
+{
+    private final int newLevel;
+    private final int oldLevel;
+
+    public PermissionsChangedEvent(ServerPlayer player, int newLevel, int oldLevel)
+    {
+        super(player);
+        this.oldLevel = oldLevel;
+        this.newLevel = newLevel;
+    }
+
+    /**
+     * @return The new permission level.
+     */
+    public int getNewLevel()
+    {
+        return newLevel;
+    }
+    /**
+     * @return The old permission level.
+     */
+    public int getOldLevel()
+    {
+        return oldLevel;
+    }
+}