board_v2.go

package main

import (
	"fmt"
	"bytes"
)

func main() {
	b := NewBoard()
	fmt.Println(b.BoardRepresentation())
}

type board struct {
	Squares []*square
}

type square struct {
	current *piece
}
func (s *square) addTo(buffer *bytes.Buffer) {
	s.current.addTo(buffer)
}

type piece struct {
	name string
}
func (p *piece) addTo(buffer *bytes.Buffer) {
	buffer.WriteString(p.name)
}


func NewSquare(piece *piece) *square {
	return &square{
		current: piece,
	}
	
}//código omitido pra ficar legal no slide

func NewPiece(name string) *piece {
	return &piece{
		name: name,
	}
}//código omitido pra ficar legal no slide

func NewBoard() *board {
	p1 := NewPiece("king")
	p2 := NewPiece("queen")
	return &board{
		Squares: []*square{NewSquare(p1), NewSquare(p2)},
	}
}//código omitido pra ficar legal no slide

func (b *board) BoardRepresentation() string {
	var buffer = &bytes.Buffer{}
	for _, s := range b.Squares {
		s.addTo(buffer)
	}
	return buffer.String()
}