refactor: clean up exports

src/samples/tic-tac-toe.ts

@@ -1,5 +1,5 @@
 import {
-    createGameCommandRegistry, Part, createRegion, createPart, isCellOccupied as isCellOccupiedUtil,
+    createGameCommandRegistry, Part, createRegion,
     IGameContext
 } from '@/index';
 
@@ -18,7 +18,6 @@ const WINNING_LINES: number[][][] = [
 
 export type PlayerType = 'X' | 'O';
 export type WinnerType = PlayerType | 'draw' | null;
-
 type TicTacToePart = Part<{ player: PlayerType }>;
 
 export function createInitialState() {
@@ -91,7 +90,7 @@ function isValidMove(row: number, col: number): boolean {
 }
 
 export function isCellOccupied(host: TicTacToeGame, row: number, col: number): boolean {
-    return isCellOccupiedUtil(host.value.parts, 'board', [row, col]);
+    return !!host.value.board.partMap[`${row},${col}`];
 }
 
 export function hasWinningLine(positions: number[][]): boolean {
@@ -119,10 +118,10 @@ export function checkWinner(host: TicTacToeGame): WinnerType {
 export function placePiece(host: TicTacToeGame, row: number, col: number, player: PlayerType) {
     const board = host.value.board;
     const moveNumber = Object.keys(host.value.parts).length + 1;
-    const piece = createPart<{ player: PlayerType }>(
-        { regionId: 'board', position: [row, col], player },
-        `piece-${player}-${moveNumber}`
-    );
+    const piece: TicTacToePart = {
+        regionId: 'board', position: [row, col], player,
+        id: `piece-${player}-${moveNumber}`
+    }
     host.produce(state => {
         state.parts[piece.id] = piece;
         board.childIds.push(piece.id);