Add an ItemHandler class and prevent players from having more than 1 aspect.

module/documents/Item/Aspect.mjs

@@ -0,0 +1,17 @@
+/** @this {Item} */
+async function _preCreate(data, options, user) {
+	if (this.parent.itemTypes.aspect.length > 0) {
+		ui.notifications.error(
+			game.i18n.format(
+				`dotdungeon.notification.error.aspect-limit-reached`,
+				{ limit: 1 }
+			),
+			{ console: false }
+		);
+		return false;
+	};
+};
+
+export default {
+	_preCreate,
+};

module/documents/Item/Handler.mjs

@@ -0,0 +1,21 @@
+import AspectItem from "./Aspect.mjs";
+
+export class ItemHandler extends Item {
+	itemTypes = {
+		aspect: AspectItem,
+	};
+
+	constructor(data, ctx) {
+		super(data, ctx);
+	};
+
+	/** @type {class|undefined} */
+	get fn() {
+		return this.itemTypes[this.type];
+	};
+
+	async _preCreate(...args) {
+		if (!this.fn?._preCreate) return;
+		return this.fn?._preCreate.bind(this)(...args);
+	};
+};

module/dotdungeon.mjs

@@ -6,6 +6,7 @@ import { SyncData } from "./models/SyncData.mjs";
 
 // Main Documents
 import { ActorHandler } from "./documents/Actor/Handler.mjs";
+import { ItemHandler } from "./documents/Item/Handler.mjs";
 
 // Character Sheets
 import { SpellSheet } from "./sheets/SpellSheet.mjs";
@@ -34,6 +35,7 @@ Hooks.once(`init`, () => {
 	CONFIG.Item.dataModels.aspect = AspectItemData;
 	CONFIG.Item.dataModels.spell = SpellItemData;
 	CONFIG.Actor.documentClass = ActorHandler;
+	CONFIG.Item.documentClass = ItemHandler;
 
 	CONFIG.DOTDUNGEON = DOTDUNGEON;
 

module/sheets/AspectSheet.mjs

@@ -1,4 +1,6 @@
-export class AspectSheet extends ItemSheet {
+import { GenericItemSheet } from "./GenericItemSheet.mjs";
+
+export class AspectSheet extends GenericItemSheet {
 	static get defaultOptions() {
 		let opts = mergeObject(
 			super.defaultOptions,
@@ -21,13 +23,13 @@ export class AspectSheet extends ItemSheet {
 
 	async getData() {
 		const ctx = {};
-		const item = this.item.toObject(false);
+		const item = this.item;
 
-		ctx.name = super.name;
 		ctx.item = item;
 		ctx.system = item.system;
 		ctx.flags = item.flags;
 
+		console.log(item.uuid, `context:`, ctx);
 		return ctx;
 	};
 };

module/sheets/PlayerSheet.mjs

@@ -33,7 +33,7 @@ export class PlayerSheet extends GenericActorSheet {
 			canAddAspect: ctx.items.aspect.length == 0,
 		};
 
-		console.log(ctx)
+		console.log(actor.uuid, `context:`, ctx)
 		return ctx;
 	};
 };

module/sheets/SpellSheet.mjs

@@ -18,7 +18,7 @@ export class SpellSheet extends GenericItemSheet {
 		super.activateListeners(html);
 
 		if (!this.isEditable) return;
-		console.debug(`.dungeon | Adding event listeners for Generic Item: ${this.id}`);
+		console.debug(`.dungeon | Adding event listeners for Spell Item: ${this.id}`);
 	};
 
 	async getData() {