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//
// Color.swift
// Sage
//
// Copyright 2016-2017 Nikolai Vazquez
// Modified by SuperGeroy
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
/// A chess color.
public enum Color: String, CustomStringConvertible {
/// White chess color.
case white
/// Black chess color.
case black
/// White color regardless of Swift version.
internal static let _white = Color.white
/// Black color regardless of Swift version.
internal static let _black = Color.black
/// An array of all colors.
public static let all: [Color] = [.white, .black]
/// Whether the color is white or not.
public var isWhite: Bool {
return self == ._white
}
/// Whether the color is black or not.
public var isBlack: Bool {
return self == ._black
}
/// A textual representation of `self`.
public var description: String {
return rawValue
}
/// The numeric representation of `self`. `White` is "0", `Black` is "1".
public var numericValue: Int {
return self.isWhite ? 0 : 1
}
/// The lowercase character for the color. `White` is "w", `Black` is "b".
public var character: Character {
return self.isWhite ? "w" : "b"
}
/// Create a color from a character of any case.
public init?(character: Character) {
switch character {
case "W", "w": self = ._white
case "B", "b": self = ._black
default: return nil
}
}
/// Returns the inverse of `self`.
public func inverse() -> Color {
return self.isWhite ? ._black : ._white
}
/// Inverts the color of `self`.
public mutating func invert() {
self = inverse()
}
}
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