bei.js

import Communicator from './communicator.js';
import GAME_LIBRARY from '../gameLibrary.js';

export default class Engine extends Communicator {
  constructor(name, author, version) {
    super();
    this.name = name;
    this.author = author;
    this.version = version;
    this.game = undefined;
    this.position = undefined;
    this.taboo = undefined;
    this.thinking = false;
  }

  _move(move) {
    this._sendMessage('move', move);
    this.thinking = false;
  }

  onConnect() {
    this._sendMessage('protocol', '1.0.0');
    if (this.name !== undefined) {
      this._sendMessage('id', 'name', this.name);
    }
    if (this.author !== undefined) {
      this._sendMessage('id', 'author', this.author);
    }
    if (this.version !== undefined) {
      this._sendMessage('id', 'version', this.version);
    }
    this._sendMessage('beiok');
  }

  onNewGame(gameIdentifier) {
    this.game = GAME_LIBRARY.get(gameIdentifier);
    this.position = undefined;
    this.taboo = undefined;
    this._sendMessage(this.game !== undefined ? 'known' : 'unknown');
  }

  onSetStrength(strength) {}

  onSetLine(position, taboo) {
    this.position = position;
    this.taboo = taboo;
  }

  onPonder(color) {}

  onGo() {
    this.thinking = true;
  }

  onStop() {
    if (this.thinking) {
      this._move(this.position.getMoveTo(this.position.children[0]));
    }
  }

  onReceiveMessage(type, ...values) {
    switch (type) {
    case 'bei':
      this.onConnect(...values);
      break;
    case 'isready':
      this._sendMessage('readyok');
      break;
    case 'newgame':
      this.onNewGame(values[0]);
      break;
    case 'setoption':
      switch (values[0]) {
      case 'strength':
        this.onSetStrength(Number(values[1]));
        break;
      default:
      }
      break;
    case 'setline':
      this.onSetLine(
        this.game.deserializePosition(values[0]),
        new Set(values.map(
          (serialization) => this.game.deserializePosition(serialization).signature,
        )),
      );
      break;
    case 'ponder':
      this.onPonder(Number(values[0]));
      break;
    case 'go':
      this.onGo();
      break;
    case 'stop':
      this.onStop();
      break;
    case 'quit':
      this.deactivate();
      break;
    default:
    }
  }
}