1 files changed, 117 insertions, 0 deletions
diff --git a/golang/pkg/agent/utils.go b/golang/pkg/agent/utils.go
new file mode 100644
index 0000000..7aa9c7b
--- /dev/null
+++ b/golang/pkg/agent/utils.go
@@ -0,0 +1,117 @@
+package agent
+
+import (
+	"cmp"
+	"fmt"
+	"math"
+	"slices"
+
+	"git.adyxax.org/adyxax/spacetraders/golang/pkg/model"
+)
+
+func distance2(a *model.Waypoint, b *model.Waypoint) int {
+	x2 := a.X - b.X
+	y2 := a.Y - b.Y
+	return x2*x2 + y2*y2
+}
+
+func (a *agent) isThereAShipAtWaypoint(waypointSymbol string) bool {
+	for _, ship := range a.ships {
+		if ship.Nav.WaypointSymbol == waypointSymbol {
+			return true
+		}
+	}
+	return false
+}
+
+func (a *agent) listWaypointsInSystemWithTrait(systemSymbol string, trait string) ([]model.Waypoint, error) {
+	waypoints, err := a.client.ListWaypointsInSystem(systemSymbol)
+	if err != nil {
+		return nil, fmt.Errorf("failed to list waypoints: %w", err)
+	}
+	waypoints = slices.DeleteFunc(waypoints, func(waypoint model.Waypoint) bool {
+		for _, t := range waypoint.Traits {
+			if t.Symbol == trait {
+				return false
+			}
+		}
+		return true
+	})
+	return waypoints, nil
+}
+
+func (a *agent) listMarketsInSystem(systemSymbol string) ([]model.Market, error) {
+	waypoints, err := a.listWaypointsInSystemWithTrait(systemSymbol, "MARKETPLACE")
+	if err != nil {
+		return nil, fmt.Errorf("failed to list waypoints in system %s with trait MARKETPLACE: %w", systemSymbol, err)
+	}
+	var markets []model.Market
+	for i := range waypoints {
+		market, err := a.client.GetMarket(waypoints[i].Symbol)
+		if err != nil {
+			return nil, fmt.Errorf("failed to get market %s: %w", waypoints[i].Symbol, err)
+		}
+		markets = append(markets, *market)
+	}
+	return markets, nil
+}
+
+func (a *agent) listShipyardsInSystem(systemSymbol string) ([]model.Shipyard, error) {
+	waypoints, err := a.listWaypointsInSystemWithTrait(systemSymbol, "SHIPYARD")
+	if err != nil {
+		return nil, fmt.Errorf("failed to list waypoints in system %s with trait SHIPYARD: %w", systemSymbol, err)
+	}
+	var shipyards []model.Shipyard
+	for i := range waypoints {
+		shipyard, err := a.client.GetShipyard(waypoints[i].Symbol)
+		if err != nil {
+			return nil, fmt.Errorf("failed to get shipyard %s: %w", waypoints[i].Symbol, err)
+		}
+		shipyards = append(shipyards, *shipyard)
+	}
+	return shipyards, nil
+}
+
+func (a *agent) sendShipToShipyardThatSells(ship *model.Ship, shipType string) error {
+	shipyards, err := a.listShipyardsInSystem(ship.Nav.SystemSymbol)
+	if err != nil {
+		return fmt.Errorf("failed to list shipyards in system %s: %w", ship.Nav.SystemSymbol, err)
+	}
+	// filter out the shipyards that do not sell our ship
+	shipyards = slices.DeleteFunc(shipyards, func(shipyard model.Shipyard) bool {
+		for _, t := range shipyard.ShipTypes {
+			if t.Type == shipType {
+				return false
+			}
+		}
+		return true
+	})
+	// sort by cheapest
+	slices.SortFunc(shipyards, func(a, b model.Shipyard) int {
+		aPrice := math.MaxInt
+		for _, ship := range a.Ships {
+			if ship.Type == shipType {
+				aPrice = ship.PurchasePrice
+				break
+			}
+		}
+		bPrice := math.MaxInt
+		for _, ship := range b.Ships {
+			if ship.Type == shipType {
+				bPrice = ship.PurchasePrice
+				break
+			}
+		}
+		return cmp.Compare(aPrice, bPrice)
+	})
+	if err := a.client.Navigate(ship, shipyards[0].Symbol); err != nil {
+		return fmt.Errorf("failed to navigate to %s: %w", shipyards[0].Symbol, err)
+	}
+	return nil
+}
+
+func sortByDistanceFrom(origin *model.Waypoint, destinations []model.Waypoint) {
+	slices.SortFunc(destinations, func(a, b model.Waypoint) int {
+		return cmp.Compare(distance2(origin, &a), distance2(origin, &b))
+	})
+}