+const Team = {
+ X: 0,
+ O: 1,
+ properties: {
+ 0: {name: "X"},
+ 1: {name: "O"}
+ }
+};
+
+function undisplay(element) {
+ element.style.display="none";
+}
+
+function add_message(severity, message) {
+ message = `<div class="message ${severity}" onclick="undisplay(this)">
+<span class="hide-button" onclick="undisplay(this.parentElement)">×</span>
+${message}
+</div>`;
+ const message_area = document.getElementById('message-area');
+ message_area.insertAdjacentHTML('beforeend', message);
+}
+
+/*********************************************************
+ * Handling server-sent event stream *
+ *********************************************************/
+
+const events = new EventSource("events");
+
+events.onerror = function(event) {
+ if (event.target.readyState === EventSource.CLOSED) {
+ add_message("danger", "Connection to server lost.");
+ }
+};
+
+events.addEventListener("game-info", event => {
+ const info = JSON.parse(event.data);
+
+ window.game.set_game_info(info);
+});
+
+events.addEventListener("player-info", event => {
+ const info = JSON.parse(event.data);
+
+ window.game.set_player_info(info);
+});
+
+events.addEventListener("player-update", event => {
+ const info = JSON.parse(event.data);
+
+ if (info.id === window.game.state.player_info.id)
+ window.game.set_player_info(info);
+});
+
+events.addEventListener("move", event => {
+ const move = JSON.parse(event.data);
+
+ window.game.receive_move(move);
+});
+
+events.addEventListener("game-state", event => {
+ const state = JSON.parse(event.data);
+
+ window.game.reset_board();
+
+ for (let square of state.moves) {
+ window.game.receive_move(square);
+ }
+});
+
+/*********************************************************
+ * Game and supporting classes *
+ *********************************************************/
+
+function GameInfo(props) {
+ if (! props.id)
+ return null;
+
+ return (
+ <div className="game-info">
+ <h2>{props.id}</h2>
+ Invite a friend to play by sending this URL: {props.url}
+ </div>
+ );
+}
+
+function PlayerInfo(props) {
+ if (! props.id)
+ return null;
+
+ return (
+ <div className="player-info">
+ <h2>Player</h2>
+ {props.name}, ID: {props.id},
+ {props.team ? ` on team ${props.team}` : " not on a team"}
+ </div>
+ );
+}
+
function Square(props) {
+ let className = "square";
+
+ if (props.value) {
+ className += " occupied";
+ } else if (props.active) {
+ className += " open";
+ }
+
+ const onClick = props.active ? props.onClick : null;
+
return (
- <button className="square" onClick={props.onClick}>
+ <div className={className}
+ onClick={onClick}>
{props.value}
- </button>
+ </div>
);
}
class Board extends React.Component {
- renderSquare(i) {
+ render_square(i) {
+ const value = this.props.squares[i];
return (
<Square
- value={this.props.squares[i]}
+ value={value}
+ active={this.props.active && ! value}
onClick={() => this.props.onClick(i)}
/>
);
return (
<div>
<div className="board-row">
- {this.renderSquare(0)}
- {this.renderSquare(1)}
- {this.renderSquare(2)}
+ {this.render_square(0)}
+ {this.render_square(1)}
+ {this.render_square(2)}
</div>
<div className="board-row">
- {this.renderSquare(3)}
- {this.renderSquare(4)}
- {this.renderSquare(5)}
+ {this.render_square(3)}
+ {this.render_square(4)}
+ {this.render_square(5)}
</div>
<div className="board-row">
- {this.renderSquare(6)}
- {this.renderSquare(7)}
- {this.renderSquare(8)}
+ {this.render_square(6)}
+ {this.render_square(7)}
+ {this.render_square(8)}
</div>
</div>
);
}
}
+function fetch_method_json(method, api = '', data = {}) {
+ const response = fetch(api, {
+ method: method,
+ headers: {
+ 'Content-Type': 'application/json'
+ },
+ body: JSON.stringify(data)
+ });
+ return response;
+}
+
+function fetch_post_json(api = '', data = {}) {
+ return fetch_method_json('POST', api, data);
+}
+
+async function fetch_put_json(api = '', data = {}) {
+ return fetch_method_json('PUT', api, data);
+}
+
class Game extends React.Component {
constructor(props) {
super(props);
this.state = {
+ game_info: {},
+ player_info: {},
history: [
{
squares: Array(9).fill(null)
}
],
- stepNumber: 0,
- xIsNext: true
+ step_number: 0,
+ next_to_play: Team.X
};
}
- handleClick(i) {
- const history = this.state.history.slice(0, this.state.stepNumber + 1);
+ set_game_info(info) {
+ this.setState({
+ game_info: info
+ });
+ }
+
+ set_player_info(info) {
+ this.setState({
+ player_info: info
+ });
+ }
+
+ reset_board() {
+ this.setState({
+ history: [
+ {
+ squares: Array(9).fill(null)
+ }
+ ],
+ step_number: 0,
+ next_to_play: Team.X
+ });
+ }
+
+ receive_move(i) {
+ const history = this.state.history.slice(0, this.state.step_number + 1);
const current = history[history.length - 1];
const squares = current.squares.slice();
- if (calculateWinner(squares) || squares[i]) {
+ if (calculate_winner(squares) || squares[i]) {
return;
}
- squares[i] = this.state.xIsNext ? "X" : "O";
+ squares[i] = Team.properties[this.state.next_to_play].name;
+ let next_to_play;
+ if (this.state.next_to_play === Team.X)
+ next_to_play = Team.O;
+ else
+ next_to_play = Team.X;
this.setState({
history: history.concat([
{
squares: squares
}
]),
- stepNumber: history.length,
- xIsNext: !this.state.xIsNext
+ step_number: history.length,
+ next_to_play: next_to_play
});
}
- jumpTo(step) {
- this.setState({
- stepNumber: step,
- xIsNext: (step % 2) === 0
- });
+ async handle_click(i, first_move) {
+ let move = { move: i };
+ if (first_move) {
+ move.assert_first_move = true;
+ }
+ const response = await fetch_post_json("move", move);
+ if (response.status == 200) {
+ const result = await response.json();
+ if (! result.legal)
+ add_message("danger", result.message);
+ } else {
+ add_message("danger", `Error occurred sending move`);
+ }
+ }
+
+ join_team(team) {
+ fetch_put_json("player", {team: team});
}
render() {
- const history = this.state.history;
- const current = history[this.state.stepNumber];
- const winner = calculateWinner(current.squares);
-
- const moves = history.map((step, move) => {
- const desc = move ?
- 'Go to move #' + move :
- 'Go to game start';
- return (
- <li key={move}>
- <button onClick={() => this.jumpTo(move)}>{desc}</button>
- </li>
- );
- });
+ const state = this.state;
+ const history = state.history;
+ const current = history[state.step_number];
+ const winner = calculate_winner(current.squares);
+ const first_move = state.step_number === 0;
+ const my_team = state.player_info.team;
+ var board_active;
let status;
- if (winner) {
- status = "Winner: " + winner;
- } else {
- status = "Next player: " + (this.state.xIsNext ? "X" : "O");
+ if (winner)
+ {
+ status = winner + " wins!";
+ if (state.player_info.team != "")
+ {
+ if (my_team === winner)
+ status += " Congratulations!";
+ else
+ status += " Better luck next time.";
+ }
+ board_active = false;
+ }
+ else if (first_move)
+ {
+ status = "Either player can make the first move.";
+ board_active = true;
+ }
+ else if (my_team === "")
+ {
+ status = "You're just watching the game.";
+ board_active = false;
+ }
+ else if (my_team === Team.properties[state.next_to_play].name)
+ {
+ status = "Your turn. Make a move.";
+ board_active = true;
+ }
+ else
+ {
+ status = "Waiting for your opponent to move.";
+ board_active = false;
}
- return (
- <div className="game">
+ return [
+ <GameInfo
+ key="game-info"
+ id={state.game_info.id}
+ url={state.game_info.url}
+ />,
+ <PlayerInfo
+ key="player-info"
+ id={state.player_info.id}
+ name={state.player_info.name}
+ team={state.player_info.team}
+ />,
+ <div key="game" className="game">
+ <button className="inline"
+ onClick={() => this.join_team('X')}>Join Team X</button>
+
+ <button className="inline"
+ onClick={() => this.join_team('O')}>Join Team O</button>
+ <div>{status}</div>
<div className="game-board">
<Board
+ active={board_active}
squares={current.squares}
- onClick={i => this.handleClick(i)}
+ onClick={i => this.handle_click(i, first_move)}
/>
</div>
- <div className="game-info">
- <div>{status}</div>
- <ol>{moves}</ol>
- </div>
</div>
- );
+ ];
}
}
-// ========================================
-
-ReactDOM.render(<Game />, document.getElementById("tictactoe"));
+ReactDOM.render(<Game
+ ref={(me) => window.game = me}
+ />, document.getElementById("tictactoe"));
-function calculateWinner(squares) {
+function calculate_winner(squares) {
const lines = [
[0, 1, 2],
[3, 4, 5],
projects / lmno.games / blobdiff