cmd: rename planet

pkg/model/game/planet.go

@@ -4,6 +4,7 @@ import (
 	"math"
 
 	"github.com/google/uuid"
+	e "github.com/iliadenisov/galaxy/pkg/error"
 )
 
 type UnidentifiedPlanet struct {
@@ -74,3 +75,32 @@ func (p *Planet) IncreasePopulation() {
 		p.Population -= extraPopulation
 	}
 }
+
+func (g Game) RenamePlanet(raceName string, planetNumber int, typeName string) error {
+	raceID, err := g.hostRaceID(raceName)
+	if err != nil {
+		return err
+	}
+	return g.renamePlanetInternal(raceID, planetNumber, typeName)
+}
+
+func (g Game) renamePlanetInternal(race uuid.UUID, number int, name string) error {
+	n, ok := validateTypeName(name)
+	if !ok {
+		return e.NewEntityTypeNameValidationError("%q", n)
+	}
+	if number < 0 {
+		return e.NewPlanetNumberError(number)
+	}
+	num := uint(number)
+	for pl := range g.Map.Planet {
+		if g.Map.Planet[pl].Number == num {
+			if g.Map.Planet[pl].Owner != race {
+				return e.NewEntityNotOwnedError("planet %#d", num)
+			}
+			g.Map.Planet[pl].Name = n
+			return nil
+		}
+	}
+	return e.NewEntityNotExistsError("planet #%d", number)
+}