1 var flask = "{{ url_for('hello', _external=True) }}"
5 var updateRemote = undefined; // defined iff remote server accessible
6 var timeToLogout = undefined; // defined during logout countdown
8 var reloadTimer = undefined;
9 var id_user; // ID of the user who is to be accounted for the next coffee
11 console.log("hello from flask");
12 //sendJSON("{\"type\":\"empty\"}");
14 function update(id, msg) {
15 document.getElementById(id).innerHTML = msg;
18 function replayOfflineQueue() {
20 let queue = JSON.parse(localStorage.getItem("offlineQueue")) || [];
21 if (Array.isArray(queue)) {
22 queue.forEach(function (entry) {
23 updateRemote(entry.data);
25 localStorage.removeItem("offlineQueue");
32 // Central function to update UI elements. To ensure that the UI is
33 // consistent, other code should only change state variables and then
34 // call this function. This function updates the UI to match the state.
37 if (updateRemote === undefined) {
38 update("remote", "<center>Server offline...</center>");
39 document.getElementById("local").style.display = "block";
42 document.getElementById("local").style.display = "none";
44 if (id_user !== undefined) {
45 document.getElementById("nextStep").innerHTML = "Now select a beverage on the coffee machineā¦";
47 document.getElementById("nextStep").innerHTML = "Enjoy your " + flavorChosen + "!";
50 if (timeToLogout !== undefined)
51 document.getElementById("logout_button").innerHTML = '<br>logout<br>(' + timeToLogout + ' s)';
55 function hiddenUpdateRemote(json) {
56 var msg = JSON.parse(json);
65 var flavor = getFlavor(msg.key);
71 ajax(msg.method, msg.route, msg.data, msg.id);
77 function loadRemote(string) {
78 var xhr = new XMLHttpRequest();
79 xhr.onreadystatechange = function() {
80 if (this.readyState == 4) {
81 if (this.status == 200) {
82 update("remote", this.responseText);
83 updateRemote = hiddenUpdateRemote;
86 clearTimeout(reloadTimer);
88 reloadTimer = setTimeout(loadRemote, 1000);
92 xhr.open("GET", flask, true);
98 function ajax(method, route, data, id) {
100 var xhr = new XMLHttpRequest();
101 xhr.onreadystatechange = function() {
102 if (this.readyState == 4) {
103 if (this.status == 200) {
104 update(id, this.responseText);
107 updateRemote = undefined;
111 var fuck = JSON.stringify({
118 let queue = JSON.parse(localStorage.getItem("offlineQueue")) || [];
119 queue.push({ time: Date.now(), data: fuck });
121 localStorage.setItem("offlineQueue", JSON.stringify(queue));
130 xhr.open(method, flask + route, true);
131 xhr.withCredentials = true;
132 xhr.setRequestHeader("Content-type", "application/json");
133 if (method === "POST") {
142 ajax("POST", "login", id, "user");
144 clearTimeout(logoutTimer);
145 timeToLogout = undefined;
150 ajax("GET", "logout", "", "user");
152 timeToLogout = undefined;
155 function countingTimeLogout(count_time)
157 timeToLogout = count_time;
159 if (count_time == 0) {
162 logoutTimer = setTimeout(function() { countingTimeLogout(count_time - 1); }, 1000);
166 function renameUser() {
167 ajax("GET", "user/rename?name=" + document.getElementById("username").value, "", "user");
170 function getFlavor(letter) {
172 case "E": return "espresso";
173 case "C": return "cappuccino";
174 case "B": return "latte macchiato";
175 case "D": return "espresso lungo";
180 function addCoffee(flavor) {
181 var data = JSON.stringify({
182 time: new Date().toISOString(),
187 ajax("POST", "coffee/add", data, "user");
188 flavorChosen = flavor;
190 countingTimeLogout(10); //mean 10 seconds
194 function sendLog(json) {
195 ajax("POST", "log", json, "log");