refactor: load/save state as ptr

internal/repo/game.go

@@ -18,11 +18,11 @@ const (
 	statePath = "state.json"
 )
 
-func (r *repo) SaveTurn(t uint, g game.Game) error {
+func (r *repo) SaveTurn(t uint, g *game.Game) error {
 	return saveTurn(r.s, t, g)
 }
 
-func saveTurn(s Storage, t uint, g game.Game) error {
+func saveTurn(s Storage, t uint, g *game.Game) error {
 	path := fmt.Sprintf("%03d/state.json", t)
 	exist, err := s.Exists(path)
 	if err != nil {
@@ -42,46 +42,46 @@ func saveTurn(s Storage, t uint, g game.Game) error {
 	return saveState(s, g) // FIXME: either save it here, or in tre repo controller
 }
 
-func saveRace(s Storage, g game.Game, i int) {
+func saveRace(s Storage, g *game.Game, i int) {
 
 }
 
-func (r *repo) SaveState(g game.Game) error {
+func (r *repo) SaveState(g *game.Game) error {
 	return saveState(r.s, g)
 }
 
-func saveState(s Storage, g game.Game) error {
+func saveState(s Storage, g *game.Game) error {
 	if err := s.Write(statePath, g); err != nil {
 		return NewStorageError(err)
 	}
 	return nil
 }
 
-func (r *repo) LoadState() (game.Game, error) {
+func (r *repo) LoadState() (*game.Game, error) {
 	return loadState(r.s, true)
 }
 
-func (r *repo) LoadStateSafe() (game.Game, error) {
+func (r *repo) LoadStateSafe() (*game.Game, error) {
 	return loadState(r.s, false)
 }
 
-func loadState(s Storage, locked bool) (game.Game, error) {
-	var g game.Game
+func loadState(s Storage, locked bool) (*game.Game, error) {
+	var g *game.Game = new(game.Game)
 	path := statePath
 	exist, err := s.Exists(path)
 	if err != nil {
-		return g, NewStorageError(err)
+		return nil, NewStorageError(err)
 	}
 	if !exist {
-		return g, NewGameNotInitializedError()
+		return nil, NewGameNotInitializedError()
 	}
 	if locked {
-		if err := s.Read(path, &g); err != nil {
-			return g, NewStorageError(err)
+		if err := s.Read(path, g); err != nil {
+			return nil, NewStorageError(err)
 		}
 	} else {
-		if err := s.ReadSafe(path, &g); err != nil {
-			return g, NewStorageError(err)
+		if err := s.ReadSafe(path, g); err != nil {
+			return nil, NewStorageError(err)
 		}
 	}
 	return g, nil