Add maze pkg

pkg/maze/position/position.go

@@ -0,0 +1,53 @@
+package position
+
+import (
+	"math/rand"
+
+	"code.chimeric.al/dwrz/minotaur/pkg/maze/direction"
+)
+
+type Position struct {
+	X, Y int
+}
+
+func (p Position) Equal(v Position) bool {
+	return p.X == v.X && p.Y == v.Y
+}
+
+func (p Position) Down() Position {
+	return Position{X: p.X, Y: p.Y + 1}
+}
+
+func (p Position) Left() Position {
+	return Position{X: p.X - 1, Y: p.Y}
+}
+
+func (p Position) Right() Position {
+	return Position{X: p.X + 1, Y: p.Y}
+}
+
+func (p Position) Up() Position {
+	return Position{X: p.X, Y: p.Y - 1}
+}
+
+func (p Position) WithDirection(d direction.Direction) Position {
+	switch d {
+	case direction.Down:
+		return p.Down()
+	case direction.Left:
+		return p.Left()
+	case direction.Right:
+		return p.Right()
+	case direction.Up:
+		return p.Up()
+	default:
+		return p
+	}
+}
+
+func Random(width, height int) Position {
+	return Position{
+		X: rand.Intn(width),
+		Y: rand.Intn(height),
+	}
+}