add general ai

app/src/main/java/chess/ai/AI.java

@@ -0,0 +1,68 @@
+package chess.ai;
+
+import java.util.List;
+
+import chess.controller.Command;
+import chess.controller.CommandExecutor;
+import chess.controller.commands.GetPieceAtCommand;
+import chess.controller.commands.GetPlayerMovesCommand;
+import chess.controller.commands.GetAllowedCastlingsCommand;
+import chess.controller.commands.GetAllowedCastlingsCommand.CastlingResult;
+import chess.controller.event.GameAdaptator;
+import chess.model.Color;
+import chess.model.Coordinate;
+import chess.model.Move;
+import chess.model.Piece;
+
+public abstract class AI extends GameAdaptator{
+
+	protected final CommandExecutor commandExecutor;
+	protected final Color color;
+
+	public AI(CommandExecutor commandExecutor, Color color) {
+		this.commandExecutor = commandExecutor;
+		this.color = color;
+	}
+
+	protected abstract void play();
+	protected abstract void promote(Coordinate pawnCoords);
+
+	@Override
+	public void onPlayerTurn(Color color, boolean undone) {
+		if (this.color != color || undone)
+			return;
+
+		play();
+	}
+
+	@Override
+	public void onPromotePawn(Coordinate pieceCoords) {
+		Piece pawn = pieceAt(pieceCoords);
+		if (pawn.getColor() != this.color)
+			return;
+		promote(pieceCoords);
+	}
+
+	protected Piece pieceAt(Coordinate coordinate) {
+		GetPieceAtCommand command = new GetPieceAtCommand(coordinate);
+		sendCommand(command);
+		return command.getPiece();
+	}
+
+	protected List<Move> getAllowedMoves() {
+		GetPlayerMovesCommand cmd = new GetPlayerMovesCommand();
+		sendCommand(cmd);
+		return cmd.getMoves();
+	}
+
+	protected CastlingResult getAllowedCastlings() {
+		GetAllowedCastlingsCommand cmd2 = new GetAllowedCastlingsCommand();
+		sendCommand(cmd2);
+		return cmd2.getCastlingResult();
+	}
+
+	protected void sendCommand(Command command) {
+		this.commandExecutor.executeCommand(command);
+	}
+	
+}