refactor: battle at controller

internal/controller/planet.go

@@ -0,0 +1,29 @@
+package controller
+
+import (
+	"fmt"
+
+	"github.com/iliadenisov/galaxy/internal/model/game"
+)
+
+func (c *Cache) Planet(planetNumber uint) (*game.Planet, bool) {
+	if c.planetByPlanetNumber == nil {
+		c.planetByPlanetNumber = make(map[uint]*game.Planet)
+		for p := range c.g.Map.Planet {
+			c.planetByPlanetNumber[c.g.Map.Planet[p].Number] = &c.g.Map.Planet[p]
+		}
+	}
+	if v, ok := c.planetByPlanetNumber[planetNumber]; ok {
+		return v, true
+	} else {
+		return nil, false
+	}
+}
+
+func (c *Cache) MustPlanet(planetNumber uint) *game.Planet {
+	if v, ok := c.Planet(planetNumber); ok {
+		return v
+	} else {
+		panic(fmt.Sprintf("Planet: not found by number=%d", planetNumber))
+	}
+}