[javascript] Implement the selling loop of the contracting automation

nodejs/automation/contracting.js

@@ -1,4 +1,5 @@
 import * as mining from './mining.js';
+import * as selling from './selling.js';
 import * as dbContracts from '../database/contracts.js';
 import * as dbShips from '../database/ships.js';
 import * as api from '../lib/api.js';
@@ -43,7 +44,8 @@ async function runProcurement(contract, ships) {
 			// Then it depends on where we are
 			switch (ship.nav.waypointSymbol) {
 			case asteroidSymbol:
-				let response = await mining.mineUntilFullOf({
+				await mining.mineUntilFullOf({
+					asteroidSymbol: asteroidSymbol,
 					good: wantedCargo,
 					symbol: ship.symbol
 				});
@@ -59,6 +61,8 @@ async function runProcurement(contract, ships) {
 				await libShips.navigate({symbol: ship.symbol, waypoint: asteroidSymbol});
 				break;
 			default:
+				// we were either selling or started contracting
+				await selling.sell(ship, wantedCargo);
 				await libShips.navigate({symbol: ship.symbol, waypoint: asteroidSymbol});
 			}
 		}

nodejs/automation/mining.js

@@ -1,22 +1,21 @@
+import * as selling from './selling.js';
 import * as dbShips from '../database/ships.js';
 import * as api from '../lib/api.js';
-import * as ships from '../lib/ships.js';
+import * as libShips from '../lib/ships.js';
+import * as utils from '../lib/utils.js';
 
-// example ctx { good: 'SILVER_ORE', symbol: 'ADYXAX-2' }
+// example ctx { asteroidSymbol: XXXXX, good: 'SILVER_ORE', symbol: 'ADYXAX-2' }
 // returns the number of units of the good the ship holds
 export async function mineUntilFullOf(ctx) {
 	while(true) {
-		let cargo = await mineUntilFull({symbol: ctx.symbol});
-		let good = cargo.inventory.filter(i => i.symbol === ctx.good)[0];
-		const antimatter = cargo.inventory.filter(i => i.symbol === 'ANTIMATTER')[0];
-		const junk = cargo.inventory.filter(i => i.symbol !== ctx.good && i.symbol !== 'ANTIMATTER');
-		if ((good?.units ?? 0) + (antimatter?.units ?? 0) >= cargo.capacity * 0.9) { // > 90% full of the valuable goods
-			return good.units;
-		} else { // we are full but need to sell junk
-			for (let i=0; i<junk.length; ++i) {
-				await ships.sell({symbol: ctx.symbol, good: junk[i].symbol, units: junk[i].units});
-			}
-		}
+		const ship = dbShips.getShip(ctx.symbol);
+		const cargo = utils.categorizeCargo(await mineUntilFull({symbol: ctx.symbol}), ctx.good);
+		const wantedUnits = Object.values(cargo.wanted).reduce((acc, e) => acc += e, 0);
+		// > 90% full of the valuable goods ?
+		if (wantedUnits >= cargo.capacity * 0.9) return;
+		// we are full but need to sell junk
+		await selling.sell(ship, ctx.good);
+		await libShips.navigate({symbol: ship.symbol, waypoint: ctx.asteroidSymbol});
 	}
 }
 
@@ -26,7 +25,7 @@ async function mineUntilFull(ctx) {
 	while(true) {
 		const ship = dbShips.getShip(ctx.symbol);
 		if (ship.cargo.units >= ship.cargo.capacity * 0.9) return ship.cargo;
-		if (await ships.extract({symbol: ctx.symbol}) === null)
+		if (await libShips.extract({symbol: ctx.symbol}) === null)
 			ship = await ship(ctx); // refresh the ships status from the server just in case
 	}
 }

nodejs/automation/selling.js

@@ -0,0 +1,76 @@
+import * as dbMarkets from '../database/markets.js';
+import * as dbShips from '../database/ships.js';
+import * as api from '../lib/api.js';
+import * as libShips from '../lib/ships.js';
+import * as libSystems from '../lib/systems.js';
+import * as utils from '../lib/utils.js';
+
+// example ctx { ship: {XXX}, keep: 'SILVER_ORE' }
+export async function sell(ship, keep) {
+    outer: while(true) {
+	// first lets see what we want to sell
+	let cargo = utils.categorizeCargo(ship.cargo, keep);
+	// get the marketdata from our location
+	const market = await libSystems.market(ship.nav.waypointSymbol);
+	// can we sell anything here?
+	const goods = whatCanBeTradedAt(cargo.goods, market.imports.concat(market.exchange));
+	for (let i = 0; i < goods.length; i++) {
+	    const symbol = goods[i].symbol;
+	    await libShips.sell({
+		good: symbol,
+		symbol: ship.symbol,
+		units: cargo.goods[symbol],
+	    });
+	    delete cargo.goods[symbol];
+	};
+	// are we done selling everything we can?
+	ship = dbShips.getShip(ship.symbol);
+	cargo = utils.categorizeCargo(ship.cargo, keep);
+	if (Object.keys(cargo.goods).length === 0) {
+	    return;
+	}
+	// we need to move somewhere else to sell our remaining goods
+	// first we look into markets in our system
+	const rawMarkets = await libSystems.trait({symbol: ship.nav.systemSymbol, trait: 'MARKETPLACE'});
+	// sorted by distance from where we are
+	const markets = rawMarkets.map(function (m) { return {
+	    data: m,
+	    distance: (m.x - ship.nav.route.destination.x) ** 2 + (m.y - ship.nav.route.destination.y) ** 2,
+	}});
+	markets.sort(function(a, b) {
+	    if (a.distance < b.distance) {
+		return -1;
+	    } else if (a.distance > b.distance) {
+		return 1;
+	    }
+	    return 0;
+	});
+	// check from the closest one if they import what we need to sell
+	for (let i = 0; i < markets.length; i++) {
+	    const waypointSymbol = markets[i].data.symbol;
+	    const market = await libSystems.market(waypointSymbol);
+	    // if we have no data on the market we need to go there and see
+	    // and if we have data and can sell there we need to go too
+	    if (market === null || whatCanBeTradedAt(cargo.goods, market.imports).length > 0) {
+		await libShips.navigate({symbol: ship.symbol, waypoint: waypointSymbol});
+		continue outer;
+	    }
+	}
+	// check from the closest one if they exchange what we need to sell
+	for (let i = 0; i < markets.length; i++) {
+	    const waypointSymbol = markets[i].data.symbol;
+	    const market = await libSystems.market(waypointSymbol);
+	    // if we can sell there we need to go
+	    if (whatCanBeTradedAt(cargo.goods, market.exchange).length > 0) {
+		await libShips.navigate({symbol: ship.symbol, waypoint: waypointSymbol});
+		continue outer;
+	    }
+	}
+	throw new Error(`Ship {ship.symbol} has found no importing or exchanging market for its cargo in the system`);
+    }
+}
+
+function whatCanBeTradedAt(cargo, goods) {
+    if (goods === undefined) return [];
+    return goods.filter(g => cargo[g.symbol] !== undefined );
+}

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('-');
 }