feat: add shape struct

game/shape_type.go

@@ -0,0 +1,34 @@
+package game
+
+type ShapeType byte
+
+const (
+	SHAPE_O ShapeType = iota
+	SHAPE_L
+	SHAPE_J
+	SHAPE_T
+	SHAPE_Z
+	SHAPE_S
+	SHAPE_I
+)
+
+func (s ShapeType) GetBlock() Block {
+	switch s {
+	case SHAPE_O:
+		return BLOCK_GREEN
+	case SHAPE_L:
+		return BLOCK_RED
+	case SHAPE_J:
+		return BLOCK_BLUE
+	case SHAPE_T:
+		return BLOCK_MAGENTA
+	case SHAPE_Z:
+		return BLOCK_YELLOW
+	case SHAPE_S:
+		return BLOCK_ORANGE
+	case SHAPE_I:
+		return BLOCK_TEAL
+	default:
+		return BLOCK_EMPTY
+	}
+}