batman

Sources/Engine/Pieces/Pawn.swift

@@ -0,0 +1,53 @@
+package class Pawn: Piece {
+	package var kind: Kind = .Pawn
+	package weak var board: Board?
+	package var color: Color
+	package var position: Square.Position
+	package var pseudoLegalPositions: [Square.Position] {
+		return []
+	}
+	package var legalPositions: [Square.Position] {
+		return pseudoLegalPositions.filter { isLegal(pos: $0) }
+	}
+
+	package var unicodeRepresentation: String {
+		return color == .Black ? "♟" : "♙"
+	}
+
+	package func move(dst: Square.Position) -> Bool {
+		guard board != nil else {
+			return false
+		}
+
+		if !(legalPositions.contains { $0 == dst }) {
+			return false
+		}
+
+		if let board = board, var s = board[position], var d = board[dst] {
+			s.piece = self
+			d.piece = nil
+		}
+
+		position = dst
+
+		return true
+	}
+
+	package func isLegal(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 }
+			}
+
+		}
+		return true
+	}
+
+	package init(
+		color: Color, on position: Square.Position
+	) {
+		self.color = color
+		self.position = position
+	}
+}