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Can now move pieces

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This commit is contained in:
cdricms
2024-06-28 19:35:43 +02:00
parent 501484558a
commit 4f5b51f4ae
11 changed files with 125 additions and 109 deletions
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83
Sources/Engine/Board.swift
View File

@@ -4,7 +4,7 @@ enum Event {
}
protocol EventDelegate {
func notify(_ event: Event)
func movePiece(_ piece: Piece, to dst: Square.Position)
func movePiece(_ piece: Piece, to dst: Square.Position) throws
}
public class Board: CustomStringConvertible, EventDelegate {
public typealias Grid = [[Square]]
@@ -24,8 +24,87 @@ public class Board: CustomStringConvertible, EventDelegate {
}
func movePiece(_ piece: Piece, to dst: Square.Position) {
func movePiece(_ piece: Piece, to dst: Square.Position) throws {
let from = piece.position
piece.position = dst
squares[dst.index!].piece = piece
squares[from.index!].piece = nil
fen.set(from: board, castling: .All, enPassant: fen.enPassant)
}
public enum MoveFailure: Error, CustomStringConvertible {
case sourceSquareUnreachable(pos: Square.Position)
case destinationSquareUnreachable(pos: Square.Position)
case squareHasNoPiece(pos: Square.Position)
case destinationIsIllegal(pos: Square.Position)
case squareANIsTooLong(an: String)
case squareANIsTooShort(an: String)
public var description: String {
return switch self {
case .sourceSquareUnreachable(let pos):
"The source square given \(pos.rank) \(pos.file) is unreachable."
case .destinationSquareUnreachable(let pos):
"The destination square given \(pos.rank) \(pos.file) is unreachable."
case .squareHasNoPiece(let pos):
"The square \(pos.rank) \(pos.file) doesn't have any piece to be moved."
case .destinationIsIllegal(let pos):
"The destination square given \(pos.rank) \(pos.file) is illegal to be moved to."
case .squareANIsTooLong(let an):
"The algebraic notation \(an) is too long. (Needs to be 2 characters)"
case .squareANIsTooShort(let an):
"The algebraic notation \(an) is too short. (Needs to be 2 characters)"
}
}
}
public func move(src: String, dst: String) throws {
guard src.count < 3 else {
throw MoveFailure.squareANIsTooLong(an: src)
}
guard src.count > 1 else {
throw MoveFailure.squareANIsTooShort(an: src)
}
guard dst.count < 3 else {
throw MoveFailure.squareANIsTooLong(an: dst)
}
guard dst.count > 1 else {
throw MoveFailure.squareANIsTooShort(an: dst)
}
guard let f1 = src.first, let r1 = src.last, r1.isWholeNumber else {
return
}
guard let f2 = dst.first, let r2 = src.last, r2.isWholeNumber else {
return
}
guard
let srcFile = Square.Position.File.init(rawValue: String(f1))?.value
else {
return
}
guard
let dstFile = Square.Position.File.init(rawValue: String(f2))?.value
else {
return
}
try move(
src: Square.Position(rank: Int8(String(r1))!, file: srcFile),
dst: Square.Position(rank: Int8(String(r2))!, file: dstFile))
}
public func move(src: Square.Position, dst: Square.Position) throws {
guard let srcSquare = self[src] else {
throw MoveFailure.sourceSquareUnreachable(pos: src)
}
guard self[dst] != nil else {
throw MoveFailure.destinationSquareUnreachable(pos: src)
}
guard let piece = srcSquare.piece else {
throw MoveFailure.squareHasNoPiece(pos: src)
}
try piece.move(to: dst)
}
public func getSquareInfo(on pos: Square.Position) -> Square? {

2
Sources/Engine/FEN.swift
View File

@@ -64,7 +64,7 @@ public struct Fen: CustomStringConvertible {
}
internal mutating func set(
from board: Board.Grid, castiling ca: CastlingAvailibility,
from board: Board.Grid, castling ca: CastlingAvailibility,
enPassant: String
) {
#warning(

14
Sources/Engine/Pieces/Bishop.swift
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@@ -12,20 +12,8 @@ final class Bishop: Piece, DiagonalMoves {
return pseudoLegalPositions.filter { isLegal(on: $0) }
}
override func move(to dst: Square.Position) {
}
override func isLegal(on pos: Square.Position) -> Bool {
if let board = board, let s = board[pos] {
if let p = s.piece {
if p.color == color { return false }
if p.kind == .King {
delegate?.notify(.kingInCheck(self))
return false
}
}
}
return true
super.isLegal(on: pos)
}
init(with color: Color, on position: Square.Position) {

15
Sources/Engine/Pieces/King.swift
View File

@@ -21,21 +21,8 @@ final class King: Piece {
return pseudoLegalPositions.filter { isLegal(on: $0) }
}
override func move(to dst: Square.Position) {
}
override func isLegal(on pos: Square.Position) -> Bool {
if let board = board, let s = board[pos] {
if let p = s.piece {
if p.color == color { return false }
if p.kind == .King {
// TODO: Notify board of check
return false
}
}
}
return true
super.isLegal(on: pos)
}
init(with color: Color, on position: Square.Position) {

16
Sources/Engine/Pieces/Knight.swift
View File

@@ -20,22 +20,8 @@ final class Knight: Piece {
return pseudoLegalPositions.filter { isLegal(on: $0) }
}
override func move(to dst: Square.Position) {
}
override func isLegal(on pos: Square.Position) -> Bool {
if let board = board, let s = board[pos] {
if let p = s.piece {
if p.color == color { return false }
if p.kind == .King {
// TODO: Notify board of check
delegate?.notify(.kingInCheck(self))
return false
}
}
}
return true
super.isLegal(on: pos)
}
init(with color: Color, on position: Square.Position) {

31
Sources/Engine/Pieces/Pawn.swift
View File

@@ -17,37 +17,8 @@ final class Pawn: Piece {
color == .Black ? "♟" : "♙"
}
override func move(to dst: Square.Position) {
if !(legalPositions.contains { $0 == dst }) {
return
}
delegate?.movePiece(self, to: dst)
// if let board = board, var s = board[position], var d = board[dst] {
// s.piece = self
// d.piece = nil
// }
// position = dst
// return true
}
override func isLegal(on pos: Square.Position) -> Bool {
// TODO: Handle "En-Passant"
if let board = board, let s = board[pos] {
if let p = s.piece {
if p.color == color { return false }
if p.kind == .King {
// TODO: Notify board of check
delegate?.notify(.kingInCheck(self))
return false
}
}
}
return true
super.isLegal(on: pos)
}
init(with color: Color, on position: Square.Position) {

24
Sources/Engine/Pieces/Piece.swift
View File

@@ -69,8 +69,28 @@ public class Piece {
return []
}
internal var delegate: EventDelegate?
internal func move(to dst: Square.Position) {}
internal func isLegal(on pos: Square.Position) -> Bool { false }
internal func move(to dst: Square.Position) throws {
if !(legalPositions.contains { $0 == dst }) {
throw Board.MoveFailure.destinationIsIllegal(pos: dst)
}
try delegate?.movePiece(self, to: dst)
}
internal func isLegal(on pos: Square.Position) -> Bool {
if let board = board, let s = board[pos] {
if let p = s.piece {
if p.color == color { return false }
if p.kind == .King {
// TODO: Notify board of check
delegate?.notify(.kingInCheck(self))
return false
}
}
}
return true
}
internal init(kind: Kind, on pos: Square.Position, with col: Color) {
self.kind = kind

17
Sources/Engine/Pieces/Queen.swift
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@@ -11,23 +11,8 @@ final class Queen: Piece, LinearMoves, DiagonalMoves {
return pseudoLegalPositions.filter { isLegal(on: $0) }
}
override func move(to dst: Square.Position) {
}
override func isLegal(on pos: Square.Position) -> Bool {
if let board = board, let s = board[pos] {
if let p = s.piece {
if p.color == color { return false }
if p.kind == .King {
// TODO: Notify board of check
delegate?.notify(.kingInCheck(self))
return false
}
}
}
return true
super.isLegal(on: pos)
}
init(with color: Color, on position: Square.Position) {

16
Sources/Engine/Pieces/Rook.swift
View File

@@ -12,22 +12,8 @@ final class Rook: Piece, LinearMoves {
return pseudoLegalPositions.filter { isLegal(on: $0) }
}
override func move(to dst: Square.Position) {
}
override func isLegal(on pos: Square.Position) -> Bool {
if let board = board, let s = board[pos] {
if let p = s.piece {
if p.color == color { return false }
if p.kind == .King {
// TODO: Notify board of check
delegate?.notify(.kingInCheck(self))
return false
}
}
}
return true
super.isLegal(on: pos)
}
init(with color: Color, on position: Square.Position) {

14
Sources/exe/main.swift
View File

@@ -11,4 +11,18 @@ print(board)
// }
do {
try board.move(src: "e4", dst: "f6")
} catch {
print(error)
}
do {
try board.move(src: .init(rank: 2, file: 5), dst: .init(rank: 4, file: 5))
} catch {
print(error)
}
print(board)
print(board.fen)
// let square = board.getSquareInfo(on: .init(rank: 2, file: 7))