Implement `PlayerMoveEvent`

src/main/java/emu/grasscutter/game/entity/EntityAvatar.java

@@ -30,6 +30,7 @@ import emu.grasscutter.net.proto.SceneAvatarInfoOuterClass.SceneAvatarInfo;
 import emu.grasscutter.net.proto.SceneEntityAiInfoOuterClass.SceneEntityAiInfo;
 import emu.grasscutter.net.proto.SceneEntityInfoOuterClass.SceneEntityInfo;
 import emu.grasscutter.net.proto.VectorOuterClass.Vector;
+import emu.grasscutter.server.event.player.PlayerMoveEvent;
 import emu.grasscutter.server.packet.send.PacketAvatarFightPropUpdateNotify;
 import emu.grasscutter.server.packet.send.PacketEntityFightPropChangeReasonNotify;
 import emu.grasscutter.server.packet.send.PacketEntityFightPropUpdateNotify;
@@ -314,4 +315,21 @@ public class EntityAvatar extends GameEntity {
 		//
 		return abilityControlBlock.build();
 	}
+
+    /**
+     * Move this entity to a new position.
+     * Additionally invoke player move event.
+     * @param newPosition The new position.
+     * @param rotation The new rotation.
+     */
+    @Override public void move(Position newPosition, Position rotation) {
+        // Invoke player move event.
+        PlayerMoveEvent event = new PlayerMoveEvent(
+            this.getPlayer(), PlayerMoveEvent.MoveType.PLAYER,
+            this.getPosition(), newPosition
+        ); event.call();
+
+        // Set position and rotation.
+        super.move(event.getDestination(), rotation);
+    }
 }

src/main/java/emu/grasscutter/game/entity/GameEntity.java

@@ -228,6 +228,17 @@ public abstract class GameEntity {
 		}
 	}
 
+    /**
+     * Move this entity to a new position.
+     * @param position The new position.
+     * @param rotation The new rotation.
+     */
+    public void move(Position position, Position rotation) {
+        // Set the position and rotation.
+        this.getPosition().set(position);
+        this.getRotation().set(rotation);
+    }
+
     /**
      * Called when this entity is added to the world
      */

src/main/java/emu/grasscutter/server/event/player/PlayerMoveEvent.java

+package emu.grasscutter.server.event.player;
+
+import emu.grasscutter.game.player.Player;
+import emu.grasscutter.server.event.Cancellable;
+import emu.grasscutter.server.event.types.PlayerEvent;
+import emu.grasscutter.utils.Position;
+
+/**
+ * TODO: Allow plugins to change the position of the player.
+ */
+public final class PlayerMoveEvent extends PlayerEvent implements Cancellable {
+    private final MoveType type;
+    private final Position from;
+    private final Position to;
+
+    public PlayerMoveEvent(Player player, MoveType type, Position from, Position to) {
+        super(player);
+
+        this.type = type;
+        this.from = from;
+        this.to = to;
+    }
+
+    public MoveType getMoveType() {
+        return this.type;
+    }
+
+    public Position getSource() {
+        return this.from;
+    }
+
+    public Position getDestination() {
+        return this.to;
+    }
+
+    public enum MoveType {
+        /**
+         * The player has sent a combat invocation to move.
+         */
+        PLAYER,
+
+        /**
+         * The server has requested that the player moves.
+         */
+        SERVER
+    }
+}
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