+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);
+}
+
+const events = new EventSource("events");
+
+events.onerror = function(event) {
+ if (event.target.readyState === EventSource.CLOSED) {
+ add_message("danger", "Connection to server lost.");
+ }
+};
+
+events.addEventListener("move", event => {
+ const square = JSON.parse(event.data);
+
+ window.game.receiveMove(square);
+});
+
function Square(props) {
return (
<button className="square" onClick={props.onClick}>
}
}
+function fetch_post_json(api = '', data = {}) {
+ const response = fetch(api, {
+ method: 'POST',
+ headers: {
+ 'Content-Type': 'application/json'
+ },
+ body: JSON.stringify(data)
+ });
+ return response;
+}
+
class Game extends React.Component {
constructor(props) {
super(props);
};
}
- handleClick(i) {
+ sendMove(i) {
+ return fetch_post_json("move", { square: i });
+ }
+
+ receiveMove(i) {
const history = this.state.history.slice(0, this.state.stepNumber + 1);
const current = history[history.length - 1];
const squares = current.squares.slice();
});
}
+ async handleClick(i) {
+ const response = await this.sendMove(i);
+ if (response.status == 200) {
+ const legal = await response.json();
+ if (! legal)
+ add_message("danger", `Illegal move.`);
+ } else {
+ add_message("danger", `Error occurred sending move`);
+ }
+ }
+
jumpTo(step) {
this.setState({
stepNumber: step,
// ========================================
-ReactDOM.render(<Game />, document.getElementById("tictactoe"));
+ReactDOM.render(<Game
+ ref={(me) => window.game = me}
+ />, document.getElementById("tictactoe"));
function calculateWinner(squares) {
const lines = [