53 lines
1.0 KiB
Swift
53 lines
1.0 KiB
Swift
enum Kind: String, CaseIterable {
|
|
case Pawn, Knight, Bishop, Rook, Queen, King
|
|
|
|
var value: Int8 {
|
|
switch self {
|
|
case .Pawn: 1
|
|
case .Bishop: 3
|
|
case .Knight: 3
|
|
case .Rook: 5
|
|
case .Queen: 9
|
|
case .King: -1
|
|
}
|
|
}
|
|
|
|
static subscript(_ c: Character) -> (Self, Color)? {
|
|
let v = c.uppercased()
|
|
|
|
guard
|
|
v == "N"
|
|
|| (Self.allCases.contains { String($0.rawValue.first!) == v })
|
|
else {
|
|
return nil
|
|
}
|
|
|
|
let kind: Self =
|
|
switch v {
|
|
case "P": .Pawn
|
|
case "N": .Knight
|
|
case "B": .Bishop
|
|
case "R": .Rook
|
|
case "Q": .Queen
|
|
case "K": .King
|
|
default: .Pawn
|
|
}
|
|
|
|
let color: Color = c.isUppercase ? .White : .Black
|
|
|
|
return (kind, color)
|
|
}
|
|
}
|
|
|
|
protocol Piece {
|
|
var board: Board? { get }
|
|
var color: Color { get }
|
|
var unicodeRepresentation: String { get }
|
|
var kind: Kind { get }
|
|
var position: Square.Position { get }
|
|
var pseudoLegalPositions: [Square.Position] { get }
|
|
var legalPositions: [Square.Position] { get }
|
|
func move(to dst: Square.Position) -> Bool
|
|
func isLegal(on pos: Square.Position) -> Bool
|
|
}
|