[node] begin the great typescript rewrite

nodejs/lib/utils.ts

@@ -0,0 +1,25 @@
+import { Cargo, CargoManifest } from '../model/cargo.ts';
+
+export type CategorizedCargo = {
+	wanted: CargoManifest;
+	goods: CargoManifest;
+};
+
+// cargo is a ship.cargo object, want is an optional symbol
+export function categorizeCargo(cargo: Cargo, want?: string): CategorizedCargo {
+	const wanted = cargo.inventory.filter(i => i.symbol === want || i.symbol === 'ANTIMATTER');
+	const goods = cargo.inventory.filter(i => i.symbol !== want && i.symbol !== 'ANTIMATTER');
+	const wobj = wanted.reduce(function(acc: CargoManifest, e) {
+		acc[e.symbol] = e.units;
+		return acc;
+	}, {});
+	const gobj = goods.reduce(function(acc: CargoManifest, e) {
+		acc[e.symbol] = e.units;
+		return acc;
+	}, {});
+	return {wanted: wobj, goods: gobj};
+}
+
+export function systemFromWaypoint(waypoint: string): string {
+	return waypoint.split('-').slice(0,2).join('-');
+}