stockfish = {
// const importObject = { env: { memory: new WebAssembly.Memory({ initial: 256 }) } };
const workerScript = await require.resolve("stockfish@11/src/stockfish.asm.js")
.then(fetch)
// .then(response => response.arrayBuffer())
// .then(response => response.text())
// .then(bytes => WebAssembly.instantiate(bytes, importObject))
.then(response => response.blob())
.then(blob => URL.createObjectURL(blob, {type: "text/javascript"}))
;
return new Worker(workerScript);
// return workerScript
}
async function ask(stockfish, command, params="") {
let
resolve,
idx = ("0000" + trigger).slice(-4),
message = command + " " + params,
promise = new Promise(r => resolve = r),
waitfor = ({
'go': 'bestmove',
'eval': 'eval',
'uci': 'uciok',
'isready': 'readyok',
'position': 'NOP',
'ucinewgame': 'NOP',
'd': 'Legal'
})[command]
;
stockfish.onmessage = e => {
console.log( e.data );
if (e.data.includes(waitfor)) {
messages.push(idx + ' <== ' + e.data, '');
mutable trigger += 1;
resolve(e.data);
} else {
messages.push(idx + ' ' + e.data);
}
}
;
if (!waitfor) throw new Error("command not available", command);
console.log( message );
messages.push(idx + ' ==> ' + message);
(waitfor === 'NOP') && messages.push('');
mutable trigger += 1;
stockfish.postMessage( message );
return promise;
}
{ trigger; return html`<pre style="display: block; font-size: 11px; line-height: 13px"; height: 120px !important; overflow-y: scroll>${ messages.slice(-30).map( v => `${v}</br>` ) }</pre>`}
{
const pgn = ``;
pgnArr = pgn
}
{
const btnReady = html`<button>Ready</button>`;
btnReady.onclick = () => ask(stockfish, "isready");
const Eval = html`<button>Eval</button>`;
Eval.onclick = () => ask(stockfish, "eval");
const btnUCI = html`<button>UCI</button>`;
btnUCI.onclick = () => ask(stockfish, "uci");
const btnGO = html`<button>Go depth 3</button>`;
btnGO.onclick = () => ask(stockfish, "go", "depth 3");
const btnNewGame = html`<button>New Game</button>`;
btnNewGame.onclick = () => ask(stockfish, "ucinewgame");
const btnFen = html`<button>Fen: N7/P3pk1p/3p2p1/r4p2/8....</button>`;
btnFen.onclick = () => ask(stockfish, "position", "fen " + fens[1]);
const btnDisplay = html`<button>Display</button>`;
btnDisplay.onclick = () => ask(stockfish, "d");
return html`${btnReady} ${Eval} ${btnUCI} ${btnNewGame} ${btnFen} ${btnGO} ${btnDisplay} `;
}
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