Merge pull request #676 from Wibble199/lancer-support

Lancer system support

README.md

@@ -49,6 +49,7 @@ Current System Compatibility:
 - [Dungeonslayers 4](https://foundryvtt.com/packages/ds4)
 - [Cypher System](https://foundryvtt.com/packages/cyphersystem)
 - [Pokemon Tabletop Reunited v4](https://github.com/dylanpiera/foundry-Pokemon-Tabletop-United-System/)
+- [Lancer](https://foundryvtt.com/packages/lancer/)
 
 Systems in Process for Compatibility:   
 - Please log a GitHub request for other systems  

src/system-support/aa-lancer.js

@@ -0,0 +1,66 @@
+// Support added by Wibble199
+
+import AAHandler from "../system-handlers/workflow-data";
+import { getRequiredData } from "./getRequiredData";
+import { trafficCop } from "../router/traffic-cop";
+
+export function systemHooks() {
+	// The Lancer system does not expose any hooks for rolling items, so have to rely on reading the chat messages.
+	Hooks.on("createChatMessage", async (msg) => {
+		if (msg.user.id !== game.user.id) return;
+
+		const itemData = getHandlerInputData(msg);
+		if (!itemData) {
+			return;
+		}
+
+		const compiledData = await getRequiredData({
+			...itemData,
+			actorId: msg.speaker?.actor,
+			tokenId: msg.speaker?.token,
+			workflow: msg
+		});
+
+		const handler = await AAHandler.make(compiledData);
+		if (!handler?.item || !handler?.sourceToken) return;
+
+		trafficCop(handler);
+	});
+}
+
+function getHandlerInputData(msg) {
+	const html = $(msg.content);
+
+	// Item IDs not provided in message data, so try and pull from the HTML
+	// For items, there is a `data-id` attribute in the root HTML content for the chat message
+	const itemId = html.data('id');
+	if (!!itemId) {
+		return { itemId };
+	}
+
+	// Core systems are not items, but as far as I can tell AA only seems to use the item.name property, so we can just
+	// pass a fake object if the template's title matches the mech's core system.
+	// This is a bit hacky but seems to work :)
+	const headerText = html.find('.lancer-header').text();
+	if (typeof headerText === 'string' && !!headerText.length) {
+		const headerTextRinised = rinseHeader(headerText);
+		const actor = msg.speaker?.actor && game.actors.get(msg.speaker.actor);
+		const frame = actor?.items.find(i => i.type === "frame");
+
+		if (frame?.system?.core_system?.active_name?.toLowerCase() === headerTextRinised.toLowerCase()) {
+			return { item: { name: headerTextRinised } };
+		}
+	}
+
+	// Otherwise, it's probably just a normal chat message or something, so ignore
+	return false;
+}
+
+/** @param {string} headerText */
+function rinseHeader(headerText) {
+	if (headerText.startsWith("// "))
+		headerText = headerText.slice(3);
+	if (headerText.endsWith(" //"))
+		headerText = headerText.slice(0, headerText.length - 3);
+	return headerText;
+}

src/system-support/index.js

@@ -26,4 +26,5 @@ export * as dnd4e from "./aa-dnd4e.js"
 export * as ars from "./aa-ars.js"
 export * as earthdawn4e from "./aa-ed4e.js"
 export * as ptr from "./aa-ptr.js";
+export * as lancer from "./aa-lancer.js";