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Chess: Gracefully handle ChessEngine disconnections

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The GUI now tracks when it becomes disconnected from ChessEngine.
If not currently waiting for a move from ChessEngine, it will
automatically reconnect on the next engine move. If a disconnection
occurs while waiting for a move, the player is asked whether they
want to try again or not.
This commit is contained in:
Tim Ledbetter 2023-04-02 21:14:16 +01:00 • committed by Sam Atkins
parent 55347ed6a5
commit 8b6c538f2a
4 changed files with 63 additions and 20 deletions
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11
Userland/Games/Chess/Engine.h
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@ -20,11 +20,17 @@ public:
Engine(Engine const&) = delete;
Engine& operator=(Engine const&) = delete;
Function<void()> on_connection_lost;
virtual void handle_bestmove(Chess::UCI::BestMoveCommand const&) override;
virtual void handle_unexpected_eof() override;
template<typename Callback>
void get_best_move(Chess::Board const& board, int time_limit, Callback&& callback)
{
if (!m_connected)
connect_to_engine_service();
send_command(Chess::UCI::PositionCommand({}, board.moves()));
Chess::UCI::GoCommand go_command;
go_command.movetime = time_limit;
@ -34,6 +40,9 @@ public:
private:
void quit();
void connect_to_engine_service();
Function<void(Chess::Move)> m_bestmove_callback;
DeprecatedString m_command;
Function<void(ErrorOr<Chess::Move>)> m_bestmove_callback;
bool m_connected { false };
};