import { html, css, LitElement } from 'https://unpkg.com/lit-element/lit-element.js?module'; import { WebsocketConnection } from './websocket.js'; import { getCookie, setCookie } from './cookie.js'; export class ServerConnection extends WebsocketConnection { static get styles() { return css``; } static get properties() { return { url: { type: String }, grid_id: { type: String }, lang: { type: String } } } constructor() { super(); this.sessionId = null; this.isRegistered = false; this.crossword_grid = null; } update(props) { if (props.has("grid_id")) { this.crossword_grid = document.getElementById(this.grid_id); this.crossword_grid.registerServerConnection(this); } super.update(props) } updateLocalSessionId() { // look whether the session id is given in url params // or stored as cookie const queryString = window.location.search; const params = new URLSearchParams(queryString); if (params.has('session')) { this.sessionId = params.get('session'); return; } const cookie_session = getCookie('session'); if (cookie_session != "") { this.sessionId = cookie_session; return; } } register() { this.updateLocalSessionId(); console.log("register", this.sessionId); this.sendMessage({ 'type': 'register', 'sessionId': this.sessionId, 'lang': this.lang }); } onopen(event) { super.onopen(event); console.log("overloaded", this); this.register(); } handleRegistration(sessionId) { if (!sessionId) { console.warn("got undefined session id"); return; } this.sessionId = sessionId; console.log("stored session", sessionId, "as cookie") setCookie("session", sessionId, 2); const urlparams = new URLSearchParams(window.location.search); if (urlparams.has('session') && this.sessionId === urlparams.get('session')){ return; } urlparams.set('session', sessionId); var newurl = window.location.protocol + "//" + window.location.host + window.location.pathname + '?session=' + sessionId; window.history.pushState({ path: newurl }, '', newurl); } handleCrossword(crossword) { this.crossword_grid.createGridByJson(crossword); } handleUpdate(updates) { var i = 0; for (i = 0; i < updates.length; i++) { const item = updates[i]; const x = item['x']; const y = item['y']; if (item.hasOwnProperty("user_input")) { const letter = item['user_input']; this.crossword_grid.updateLetter(x, y, letter, false); } if (item.hasOwnProperty("revealed")) { console.log("update"); const letter = item['revealed']; this.crossword_grid.updateLetter(x, y, letter, true); } } } onmessage(event) { super.onmessage(event) try { const msg = JSON.parse(event.data); if (!msg.type) { throw "missing type" } switch (msg.type) { case 'register': { this.handleRegistration(msg.sessionId); break; } case 'crossword': { this.handleCrossword(msg.crossword); break; } case 'update': { this.handleUpdate(msg.updates); break } } } catch (err) { console.error("could not parse servermessage", err); return } } } customElements.define('server-connection', ServerConnection);