Add maze pkg

pkg/maze/direction/direction.go

@@ -0,0 +1,43 @@
+package direction
+
+import (
+	"math/rand"
+)
+
+type Direction int
+
+const (
+	Down Direction = iota
+	Left
+	Right
+	Up
+)
+
+func (d Direction) Opposite() Direction {
+	switch d {
+	case Down:
+		return Up
+	case Left:
+		return Right
+	case Right:
+		return Left
+	case Up:
+		return Down
+	default:
+		return d
+	}
+}
+
+func Directions() [4]Direction {
+	return [4]Direction{Down, Left, Right, Up}
+}
+
+func RandomDirections() [4]Direction {
+	var dirs = [...]Direction{Down, Left, Right, Up}
+
+	rand.Shuffle(len(dirs), func(i, j int) {
+		dirs[i], dirs[j] = dirs[j], dirs[i]
+	})
+
+	return dirs
+}