[golang] implement shipyards visits

golang/pkg/agent/visit.go

@@ -2,7 +2,7 @@ package agent
 
 import (
 	"fmt"
-	"log/slog"
+	"slices"
 
 	"git.adyxax.org/adyxax/spacetraders/golang/pkg/model"
 )
@@ -12,13 +12,44 @@ func (a *agent) visitAllShipyards(ship *model.Ship) error {
 	if err != nil {
 		return fmt.Errorf("failed to visit all shipyards: %w", err)
 	}
-	waypoints, err := a.client.ListWaypointsInSystem(system, a.db)
+	shipyards, err := a.listShipyardsInSystem(system)
 	if err != nil {
 		return fmt.Errorf("failed to visit all shipyards: %w", err)
 	}
-	//slog.Info("get system", "system", system.Waypoints, "err", err)
-	//waypoint, err := a.client.GetWaypoint("X1-RR14-J88", a.db)
-	slog.Info("get waypoint", "waypoint", waypoints[0])
-
-	return fmt.Errorf("failed to visit all shipyards: not implemented yet")
+	shipyards = slices.DeleteFunc(shipyards, func(shipyard model.Shipyard) bool {
+		// filter out shipyards for which we already have ships prices
+		if shipyard.Ships != nil {
+			return true
+		}
+		// filter out shipyards for which a ship is either present or inbound
+		waypoint, err := a.client.GetWaypoint(shipyard.Symbol, a.db)
+		if err != nil {
+			panic(fmt.Errorf("failed to visit all shipyards: %w", err))
+		}
+		return a.isThereAShipAtWaypoint(waypoint)
+	})
+	if len(shipyards) == 0 {
+		return nil
+	}
+	waypoint, err := a.client.GetWaypoint(ship.Nav.WaypointSymbol, a.db)
+	if err != nil {
+		return fmt.Errorf("failed to visit all shipyards: %w", err)
+	}
+	waypoints := make([]model.Waypoint, 0)
+	for i := range shipyards {
+		waypoint, err := a.client.GetWaypoint(shipyards[i].Symbol, a.db)
+		if err != nil {
+			return fmt.Errorf("failed to visit all shipyards: %w", err)
+		}
+		waypoints = append(waypoints, *waypoint)
+	}
+	sortByDistanceFrom(*waypoint, waypoints)
+	if err := a.client.Navigate(ship, &waypoints[0], a.db); err != nil {
+		return fmt.Errorf("failed to visit all shipyards: %w", err)
+	}
+	if _, err := a.client.GetShipyard(&waypoints[0], a.db); err != nil {
+		return fmt.Errorf("failed to visit all shipyards: %w", err)
+	}
+	// TODO get market data
+	return a.visitAllShipyards(ship)
 }