Add socket event handling foundations and an updateSands event in anticipation of hasty rolls

module/sockets/_index.mjs

@@ -0,0 +1,27 @@
+import { localizer } from "../utils/Localizer.mjs";
+import { Logger } from "../utils/Logger.mjs";
+import { updateSands } from "./updateSands.mjs";
+
+const events = {
+	updateSands,
+};
+
+export function registerSockets() {
+	Logger.info(`Setting up socket listener`);
+
+	game.socket.on(`system.${game.system.id}`, (data, userID) => {
+		const { event, payload } = data ?? {};
+		if (event == null || payload === undefined) {
+			ui.notifications.error(localizer(`RipCrypt.notifs.error.invalid-socket`));
+			return;
+		};
+
+		if (events[event] == null) {
+			ui.notifications.error(localizer(`RipCrypt.notifs.error.unknown-socket-event`, { event }));
+			return;
+		};
+
+		const user = game.users.get(userID);
+		events[event](payload, user);
+	});
+};