mchess-server/chess/piece_interface.go

package chess

import (
	"mchess_server/types"
	"strings"
)

type Piece interface {
	GetAllNonBlockedSquares(board Board, fromSquare types.Coordinate) []types.Coordinate
	GetAllAttackedSquares(board Board, fromSquare types.Coordinate) []types.Coordinate
	GetColor() types.ChessColor
	AfterMoveAction(board *Board, fromSquare types.Coordinate)
}

func GetPieceForShortName(name types.PieceShortName) Piece {
	var piece Piece
	nameString := name.String()

	var color = types.Black
	if nameString < "Z" && nameString > "A" {
		color = types.White
	}

	nameString = strings.ToLower(nameString)

	switch nameString {
	case "p":
		piece = Pawn{Color: color}
	case "q":
		piece = Queen{Color: color}
	case "k":
		piece = King{Color: color}
	case "b":
		piece = Bishop{Color: color}
	case "r":
		piece = Rook{Color: color}
	case "n":
		piece = Knight{Color: color}
	}

	return piece
}

func GetShortNameForPiece(piece Piece) types.PieceShortName {
	var name string

	switch piece.(type) {
	case Pawn:
		name = "p"
	case Queen:
		name = "q"
	case King:
		name = "k"
	case Bishop:
		name = "b"
	case Rook:
		name = "r"
	case Knight:
		name = "n"
	}

	if piece.GetColor() == types.White {
		name = strings.ToUpper(name)
	}
	return types.PieceShortName(name)
}