race quit, transfer state, refactor

internal/controller/ship_group_send.go

@@ -6,14 +6,6 @@ import (
 	"github.com/iliadenisov/galaxy/internal/util"
 )
 
-func (c *Controller) SendGroup(raceName string, groupIndex, planetNumber, quantity uint) error {
-	ri, err := c.Cache.raceIndex(raceName)
-	if err != nil {
-		return err
-	}
-	return c.Cache.SendGroup(ri, groupIndex, planetNumber, quantity)
-}
-
 func (c *Cache) SendGroup(ri int, groupIndex, planetNumber, quantity uint) error {
 	c.validateRaceIndex(ri)
 
@@ -29,7 +21,7 @@ func (c *Cache) SendGroup(ri int, groupIndex, planetNumber, quantity uint) error
 
 	sourcePlanet, ok := c.ShipGroup(sgi).AtPlanet()
 	if !ok {
-		return e.NewShipsBusyError()
+		return e.NewShipsBusyError("state: %s", c.ShipGroup(sgi).State())
 	}
 
 	if c.ShipGroup(sgi).Number < quantity {