Add global GUI changer

Author: APickledWalrus

src/main/java/io/github/apickledwalrus/skriptgui/elements/expressions/ExprGUIWithId.java

@@ -4,15 +4,13 @@
 import io.github.apickledwalrus.skriptgui.gui.GUIManager;
 import org.bukkit.event.Event;
 
-import ch.njol.skript.classes.Changer.ChangeMode;
 import ch.njol.skript.doc.Description;
 import ch.njol.skript.doc.Name;
 import ch.njol.skript.doc.Since;
 import ch.njol.skript.lang.Expression;
 import ch.njol.skript.lang.SkriptParser.ParseResult;
 import ch.njol.skript.lang.util.SimpleExpression;
 import ch.njol.util.Kleenean;
-import ch.njol.util.coll.CollectionUtils;
 import io.github.apickledwalrus.skriptgui.SkriptGUI;
 import io.github.apickledwalrus.skriptgui.gui.GUI;
 import org.jetbrains.annotations.Nullable;
@@ -55,24 +53,6 @@ protected GUI[] get(Event event) {
 			.toArray(GUI[]::new);
 	}
 
-	@Override
-	public Class<?> @Nullable [] acceptChange(ChangeMode mode) {
-		if (mode == ChangeMode.DELETE) {
-			return CollectionUtils.array();
-		}
-		return null;
-	}
-
-	@Override
-	public void change(Event event, Object @Nullable [] delta, ChangeMode mode) {
-		for (String id : ids.getArray(event)) {
-			GUI gui = SkriptGUI.getGUIManager().getGUI(id);
-			if (gui != null) {
-				gui.setID(null);
-			}
-		}
-	}
-
 	@Override
 	public boolean isSingle() {
 		return ids.isSingle();

src/main/java/io/github/apickledwalrus/skriptgui/types/GUIClassInfo.java

@@ -1,10 +1,12 @@
 package io.github.apickledwalrus.skriptgui.types;
 
+import ch.njol.skript.classes.Changer;
 import ch.njol.skript.classes.Changer.ChangeMode;
 import ch.njol.skript.classes.ClassInfo;
 import ch.njol.skript.classes.Parser;
 import ch.njol.skript.lang.ParseContext;
 import ch.njol.skript.registrations.Classes;
+import ch.njol.util.coll.CollectionUtils;
 import io.github.apickledwalrus.skriptgui.gui.GUI;
 import net.kyori.adventure.text.Component;
 import org.jetbrains.annotations.NotNull;
@@ -24,6 +26,7 @@ public GUIClassInfo(SkriptAddon source) {
 			.examples("See the GUI creation section.")
 			.since("1.0.0")
 			.parser(new GUIParser())
+			.changer(new GUIChanger())
 			.property(Property.NAME,
 				"A GUI's name. Can be set, cleared, or reset.",
 				source,
@@ -56,6 +59,25 @@ public String toVariableNameString(GUI gui) {
 
 	}
 
+	private static final class GUIChanger implements Changer<GUI> {
+
+		@Override
+		public Class<?> @Nullable [] acceptChange(ChangeMode mode) {
+			if (mode == ChangeMode.DELETE) {
+				return CollectionUtils.array();
+			}
+			return null;
+		}
+
+		@Override
+		public void change(GUI[] guis, Object @Nullable [] delta, ChangeMode mode) {
+			for (GUI gui : guis) {
+				gui.setID(null);
+			}
+		}
+
+	}
+
 	private static final class GUINameHandler implements ExpressionPropertyHandler<GUI, Component> {
 
 		@Override