chore: refactor structure

internal/controller/controller.go

@@ -0,0 +1,71 @@
+package controller
+
+import (
+	"fmt"
+
+	"github.com/iliadenisov/galaxy/internal/model/game"
+	"github.com/iliadenisov/galaxy/internal/repo"
+)
+
+type Repo interface {
+	// Lock must be called before any repository operations
+	Lock() error
+
+	// Release must be called after first and only repository operation
+	Release() error
+
+	// SaveTurn stores just generated new turn
+	SaveTurn(uint, game.Game) error
+
+	// SaveState stores current game state updated between turns
+	SaveState(game.Game) error
+
+	// LoadState retrieves game current state
+	LoadState() (game.Game, error)
+}
+
+type Ctrl struct {
+	param Param
+	Repo  Repo
+}
+
+type Param struct {
+	StoragePath string
+}
+
+func NewController(configure func(*Param)) (*Ctrl, error) {
+	c := &Param{
+		StoragePath: ".",
+	}
+	if configure != nil {
+		configure(c)
+	}
+	r, err := repo.NewFileRepo(c.StoragePath)
+	if err != nil {
+		return nil, err
+	}
+	return &Ctrl{
+		param: *c,
+		Repo:  r,
+	}, nil
+}
+
+func (c *Ctrl) ExecuteInit(consumer func(Repo)) error {
+	if err := c.Repo.Lock(); err != nil {
+		return fmt.Errorf("execute: lock failed: %s", err)
+	}
+	consumer(c.Repo)
+	return c.Repo.Release()
+}
+
+func (c *Ctrl) Execute(consumer func(Repo, game.Game)) error {
+	if err := c.Repo.Lock(); err != nil {
+		return fmt.Errorf("execute: lock failed: %s", err)
+	}
+	g, err := c.Repo.LoadState()
+	if err != nil {
+		return err
+	}
+	consumer(c.Repo, g)
+	return c.Repo.Release()
+}