feat: remove unreachable routes

internal/controller/route.go

@@ -92,7 +92,7 @@ func (c *Cache) RemovePlanetRoute(rt game.RouteType, origin uint) {
 }
 
 // TODO: NOT IN THIS FUNC: remove routes if planet became uninhabited (bombing, quit game, etc)
-func (c *Cache) EnrouteGroups() {
+func (c *Cache) SendRoutedGroups() {
 	for pi := range c.g.Map.Planet {
 		if len(c.g.Map.Planet[pi].Route) == 0 {
 			continue
@@ -200,6 +200,25 @@ func (c *Cache) TurnUnloadEnroutedGroups() {
 		for _, rt := range []game.RouteType{game.RouteMaterial, game.RouteCapital} {
 			c.doUnload(c.listRoutedUnloadShipGroupIds(p.Number, rt))
 		}
+		p.UnpackColonists()
+		p.UnpackCapital()
+	}
+}
+
+func (c *Cache) RemoveUnreachableRoutes() {
+	for i := range c.g.Map.Planet {
+		p1 := &c.g.Map.Planet[i]
+		if p1.Owner == uuid.Nil {
+			continue
+		}
+		ri := c.RaceIndex(p1.Owner)
+		for rt, destination := range p1.Route {
+			p2 := c.MustPlanet(destination)
+			rangeToDestination := util.ShortDistance(c.g.Map.Width, c.g.Map.Height, p1.X, p1.Y, p2.X, p2.Y)
+			if rangeToDestination > c.g.Race[ri].FlightDistance() {
+				delete(p1.Route, rt)
+			}
+		}
 	}
 }