[javascript] Implement the selling loop of the contracting automation

nodejs/lib/ships.js

@@ -139,7 +139,7 @@ export async function refuel(ctx) {
 }
 
 export async function sell(ctx) {
-	// TODO check if our current waypoint has a marketplace (and sells fuel)?
+	// TODO check if our current waypoint has a marketplace?
 	await dock(ctx);
 	const ship = dbShips.getShip(ctx.symbol);
 	const response = await api.send({endpoint: `/my/ships/${ctx.symbol}/sell`, method: 'POST', payload: { symbol: ctx.good, units: ctx.units }});

nodejs/lib/utils.js

@@ -1,3 +1,18 @@
+// cargo is a ship.cargo object, want is an optional symbol
+export function categorizeCargo(cargo, want) {
+    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, e) {
+	acc[e.symbol] = e.units;
+	return acc;
+    }, {});
+    const gobj = goods.reduce(function(acc, e) {
+	acc[e.symbol] = e.units;
+	return acc;
+    }, {});
+    return {wanted: wobj, goods: gobj};
+}
+
 export function systemFromWaypoint(waypoint) {
 	return waypoint.split('-').slice(0,2).join('-');
 }