foundry-vtt-system-midgard5/source/module/sheets/M5ItemSheet.ts

import { M5Item } from "../items/M5Item";
import { M5Attributes, M5ItemMod, M5ModOperation, M5ModType, M5RollTemplate } from "../M5Base";

export class M5ItemSheet extends ItemSheet {
	static get defaultOptions() {
		return mergeObject(super.defaultOptions, {
			width: 640,
			height: 480,
			classes: ["midgard5", "sheet", "item"],
		});
	}

	get template() {
		//console.log("M5ItemSheet", this.item.data.type)
		const path = "systems/midgard5/templates/sheets/item";
		return `${path}/${this.item.type}.hbs`;
	}

	override getData(options?: Partial<ItemSheet.Options>): ItemSheet.Data<ItemSheet.Options> | Promise<ItemSheet.Data<ItemSheet.Options>> {
		const item = this.item as M5Item;
		return Promise.resolve(super.getData()).then((value) => {
			item.prepareDerivedData();
			const context = value as any;

			// Use a safe clone of the item data for further operations.
			const itemData = context.item;

			// Retrieve the roll data for TinyMCE editors.
			context.rollData = {};
			let actor = this.object?.parent ?? null;
			if (actor) {
				context.rollData = actor.getRollData();
			}

			context.data = itemData.system;
			context.flags = itemData.flags;

			return context;
		});
	}

	override activateListeners(html: JQuery) {
		super.activateListeners(html);

		html.find(".add-mod").on("click", async (event) => {
			const context = this.object;
			const mods = context.system.mods;
			const modIndex = Object.keys(mods).length;
			mods[modIndex.toString()] = {
				type: M5ModType.ATTRIBUTE,
				id: M5Attributes.ST,
				operation: M5ModOperation.ADD,
				value: 0,
			} as M5ItemMod;
			this.object.update({
				data: {
					mods: mods,
				},
			});
		});

		html.find(".mod-delete").on("click", async (event) => {
			let target = event.target.closest("[data-mod-id]") as HTMLElement;
			let modId = target ? target.dataset.modId : null;

			const context = this.item;
			delete context.system.mods[modId];
			this.render(false);
		});

		html.find(".roll-delete").on("click", async (event) => {
			let target = event.target.closest("[data-roll]") as HTMLElement;
			let rollIndex = target ? target.dataset.roll : null;

			const rolls = this.item.system.rolls.formulas;
			delete rolls[rollIndex];
			this.render(false);
		});

		html.find(".roll-create").on("click", async (event) => {
			const rolls = this.item.system.rolls.formulas;

			const indeces = Object.keys(rolls)
				.map((index) => parseInt(index))
				.sort()
				.reverse();
			const index = (indeces.find((index) => !!rolls[index.toString()]) ?? -1) + 1;
			console.log("roll-create", rolls, indeces, index);

			rolls[index.toString()] = {
				formula: "1d6",
				label: (game as Game).i18n.localize("midgard5.roll"),
				enabled: true,
			} as M5RollTemplate;

			this.item.update({
				data: {
					rolls: {
						formulas: rolls,
					},
				},
			});
			this.render(false);
		});

		// Drag & Drop
		if (["item"].includes(this.object.type)) {
			const itemToItemAssociation = new DragDrop({
				dragSelector: ".item",
				dropSelector: ".item-list",
				permissions: {
					dragstart: this._canDragStart.bind(this),
					drop: this._canDragDrop.bind(this),
				},
				callbacks: { drop: this._onDropItem.bind(this) },
			});
			itemToItemAssociation.bind(html[0]);
		}
	}

	_canDragStart(selector) {
		console.log("M5ItemSheet._canDragStart", selector);
		return this.options.editable && this.object.isOwner;
	}

	_canDragDrop(selector) {
		console.log("M5ItemSheet._canDragDrop", selector);
		return true;
	}

	async _onDropItem(event) {
		let data;
		const obj = this.object;
		const li = event.currentTarget;

		try {
			data = JSON.parse(event.dataTransfer.getData("text/plain"));
			if (data.type !== "Item") return false;
		} catch (err) {
			return false;
		}

		// Case 1 - Import from a Compendium pack
		let itemObject;
		if (data.pack) {
			const compendiumObject = await (this as any).importItemFromCollection(data.pack, data.id);
			itemObject = compendiumObject.data;
		}

		// Case 2 - Import from World entity
		else {
			const originalItem = await (game as Game).items.get(data.id);
			itemObject = duplicate(originalItem);
			if (!itemObject) return;
		}

		if (itemObject.type === "mod") {
			let mods = obj?.system?.mods;
			if (!mods) mods = [];

			itemObject.id = randomID();
			console.log("M5ItemSheet._onDropItem", itemObject);
			mods.push(itemObject);

			obj.update({
				data: {
					mods: mods,
				},
			});
		}
	}

	async _onDragItemStart(event) {}
}