(schism): started separating backend from frontend
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117b535962
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13 changed files with 1214 additions and 163 deletions
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@ -1,126 +1,12 @@
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import { addRoute, setTitle, type RouteHandlerReturn } from "@app/routing";
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import { addRoute, type RouteHandlerReturn } from "@app/routing";
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import tttPage from "./ttt.html?raw";
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import { showError, showInfo, showSuccess } from "@app/toast";
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// Represents the possible states of a cell on the board.
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// `null` means that the cell is empty.
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type CellState = 'O' | 'X' | null
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// Encapsulates the game logic.
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class TTC {
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private isGameOver: boolean;
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private board: [
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CellState, CellState, CellState,
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CellState, CellState, CellState,
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CellState, CellState, CellState];
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private currentPlayer: 'O' | 'X';
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constructor() {
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this.board = [null,null,null,null,null,null,null,null,null];
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this.isGameOver = false;
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this.currentPlayer = 'X';
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}
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private changePlayer()
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{
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if (this.currentPlayer === 'X')
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this.currentPlayer = 'O';
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else
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this.currentPlayer = 'X';
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}
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// Analyzes the current board to determine if the game has ended.
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private checkState(): 'winX' | 'winO' | 'draw' | 'ongoing'
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{
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const checkRow = (row: number): ('X' | 'O' | null) => {
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if (this.board[row * 3] === null)
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return null;
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if (this.board[row * 3] === this.board[row * 3 + 1] && this.board[row * 3 + 1] === this.board[row * 3 + 2])
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return this.board[row * 3];
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return null;
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}
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const checkCol = (col: number): ('X' | 'O' | null) => {
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if (this.board[col] === null) return null;
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if (this.board[col] === this.board[col + 3] && this.board[col + 3] === this.board[col + 6])
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return this.board[col];
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return null;
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}
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const checkDiag = (): ('X' | 'O' | null) => {
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if (this.board[4] === null) return null
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if (this.board[0] === this.board[4] && this.board[4] === this.board[8])
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return this.board[4]
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if (this.board[2] === this.board[4] && this.board[4] === this.board[6])
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return this.board[4]
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return null;
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}
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const row = (checkRow(0) ?? checkRow(1)) ?? checkRow(2);
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const col = (checkCol(0) ?? checkCol(1)) ?? checkCol(2);
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const diag = checkDiag();
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if (row !== null) return `win${row}`;
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if (col !== null) return `win${col}`;
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if (diag !== null ) return `win${diag}`;
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if (this.board.filter(c => c === null).length === 0)
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return 'draw';
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return 'ongoing';
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}
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public reset(): void {
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this.board = [null,null,null,null,null,null,null,null,null];
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this.currentPlayer = 'X';
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this.isGameOver = false;
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};
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// Attempts to place the current player's mark on the specified cell.
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// @param idx - The index of the board (0-8) to place the mark.
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// @returns The resulting game state, or `invalidMove` if the move is illegal.
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public makeMove(idx: number): 'winX' | 'winO' | 'draw' | 'ongoing' | 'invalidMove' {
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if (this.isGameOver) {
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return 'invalidMove';
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}
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if (idx < 0 || idx >= this.board.length) {
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return 'invalidMove';
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}
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if (this.board[idx] !== null) {
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return 'invalidMove';
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}
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this.board[idx] = this.currentPlayer;
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this.changePlayer();
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const result = this.checkState();
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if (result !== 'ongoing') {
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this.isGameOver = true;
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}
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return result;
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}
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public getBoard(): [
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CellState, CellState, CellState,
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CellState, CellState, CellState,
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CellState, CellState, CellState]
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{
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return this.board;
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}
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}
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import { io, Socket } from "socket.io-client";
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// Route handler for the Tic-Tac-Toe page.
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// Instantiates the game logic and binds UI events.
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async function handleTTT(): Promise<RouteHandlerReturn>
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{
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// Create a fresh instance for every page load.
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let board = new TTC();
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async function handleTTT(): Promise<RouteHandlerReturn> {
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const socket: Socket = io("http://localhost:80");
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return {
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html: tttPage,
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@ -131,61 +17,49 @@ async function handleTTT(): Promise<RouteHandlerReturn>
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const cells = app.querySelectorAll<HTMLDivElement>(".ttt-grid-cell");
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const restartBtn = app.querySelector<HTMLButtonElement>("#ttt-restart-btn");
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const grid = app.querySelector('.ttt-grid'); // Not sure about this one
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const updateUI = () => {
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const board_state = board.getBoard();
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board_state.forEach((cell_state, cell_idx) => {
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cells[cell_idx].innerText = cell_state !== null ? cell_state : " ";
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});
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const updateUI = (boardState: (string | null)[]) => {
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boardState.forEach((state, idx) => {
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cells[idx].innerText = state || " ";
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});
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};
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console.log(cells);
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socket.on('gameState', (data) => {
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updateUI(data.board);
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if (data.lastResult && data.lastResult !== 'ongoing') {
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grid?.classList.add('pointer-events-none');
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if (data.lastResult === 'winX') {
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showSuccess('X won !');
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} if (data.lastResult === 'winO') {
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showSuccess('O won !');
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} if (data.lastResult === 'draw') {
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showInfo('Draw !');
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}
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}
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if (data.reset) {
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grid?.classList.remove('pointer-events-none');
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showInfo('Game Restarted');
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}
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});
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socket.on('error', (msg) => {
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showError(msg);
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});
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cells?.forEach(function (c, idx) {
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c.addEventListener('click', () => {
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const result = board.makeMove(idx);
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switch(result)
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{
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case ('draw'): {
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showInfo('Game is a draw');
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break;
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}
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case ('invalidMove'): {
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showError('Move is invalid');
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break;
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}
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case ('winX'): {
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showSuccess('X won');
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app?.querySelector('.ttt-grid')?.classList.add('pointer-events-none');
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break;
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}
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case ('winO'): {
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showSuccess('O won');
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app?.querySelector('.ttt-grid')?.classList.add('pointer-events-none');
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break;
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}
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}
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// Sync UI with Game State
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const board_state = board.getBoard();
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board_state.forEach( function (cell_state, cell_idx) {
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cells[cell_idx].innerText = cell_state !== null ? cell_state : " ";
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});
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updateUI();
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socket.emit('makeMove', idx);
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});
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});
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restartBtn?.addEventListener('click', () => {
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board.reset();
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// Remove pointer-events-none to re-enable the board if it was disabled
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app?.querySelector('.ttt-grid')?.classList.remove('pointer-events-none');
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updateUI();
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showInfo('Game Restarted');
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socket.emit('resetGame');
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});
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}
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},
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}
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}
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addRoute('/ttt', handleTTT)
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addRoute('/ttt', handleTTT);
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