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index.html
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<!DOCTYPE html>
<html>
<head>
<title>Time Counter</title>
<style>
label {
font-weight: bold;
}
#general_status {
margin-top: 50px;
font-family: sans-serif;
border: 1px double;
}
</style>
</head>
<body>
<form>
<label for="select_user">Select existing User:</label>
<select name="select_user">
<option value="">Select</option>
</select>
<label>Or create a new one:</label>
<input type="text" name="input_user" />
<button type="submit">Choose user</button>
</form>
<h1>Time Counter for <span id="user_label"></span></h1>
<p id="counter"></p>
<button type="button" id="theButton">Start</button>
<button type="button" onclick="resetCounter()">Reset</button>
<table border="1" id="general_status"></table>
</body>
<script>
let intervalId;
let storerHandler = null;
let start = null;
let lastStart = null;
let stopTime = null;
let diff = 0.0;
let user = null;
let url = new URL(location.href);
let rootUrl = url.protocol + '//' + url.host + url.pathname;
(async () => {
let resp = await fetch(rootUrl+"users");
let users = await resp.json();
console.log(users);
users.forEach((user) => {
let opt = document.createElement("option");
opt.value = user;
opt.textContent = user;
document.querySelector("select").appendChild(opt);
});
})();
//let user = users[Math.trunc(Math.random() * users.length)];
let ws = new WebSocket("ws://"+ url.host +"/ws");
console.log("websocket created", ws);
ws.onopen = function (event) {
console.log("websocket opened", event);
};
ws.onmessage = async function (event) {
let obj = JSON.parse(await event.data.text());
console.log("websocket message", obj);
if (obj.action == "startedTimer" && obj.user != user) {
let but = document.querySelector("#theButton");
// if received a websocket message, stop this timer
if (but.textContent == "Stop") {
console.log(
"Stop this timer because " + obj.user + " started its own!"
);
but.click();
}
}
};
ws.onerror = function (event) {
console.log("websocket error", event);
};
//document.getElementById("counter").textContent = formatTime(0);
document
.getElementById("theButton")
.addEventListener("click", startCounter);
document.querySelector("form").addEventListener("submit", (evt) => {
evt.preventDefault();
user = document.querySelector("input[name=input_user]").value;
if (user.length == 0) {
user = document.querySelector("select").value;
if (user.length == 0) {
alert("Please select or enter a user");
return;
}
}
console.log("chosen user:", user);
document.getElementById("user_label").textContent = user;
document.title = "Time Counter - " + user;
console.log("checking localStorage for stored time count");
console.log(localStorage);
let stored_state_secs = localStorage.getItem("lasted_secs");
if (stored_state_secs) {
console.log("stored time count found on localStorage");
lastStart = new Date();
console.log("now", lastStart);
let storedSecs = parseFloat(stored_state_secs);
console.log("stored_secs", storedSecs);
lastStart.setTime(lastStart.getTime() - storedSecs * 1000);
document.getElementById("counter").textContent = formatTime(storedSecs);
stopTime = new Date();
} else {
fetch(
rootUrl + "/get_state?" +
new URLSearchParams({ user: user })
)
.then(async (resp) => {
console.log(resp.status);
if (resp.status == 200) {
let obj = await resp.json();
let stored_state_secs = obj[user];
console.log("last secs for " + user + ":", stored_state_secs);
if (stored_state_secs != null) {
lastStart = new Date();
console.log("now", lastStart);
let storedSecs = parseFloat(stored_state_secs);
console.log("stored_secs", storedSecs);
diff = storedSecs;
lastStart.setTime(lastStart.getTime() - diff * 1000);
console.log("diff:", diff);
console.log("lastStart", lastStart);
document.getElementById("counter").textContent =
formatTime(diff);
stopTime = new Date();
}
} else {
console.log("Error! no stored state for " + user);
console.error(resp.text());
}
})
.catch((err) => {
console.log(err);
});
}
});
// given a number in seconds, return a string in the format "hh:mm:ss"
function formatTime(seconds) {
let hours = Math.floor(seconds / 3600);
let minutes = Math.floor((seconds - hours * 3600) / 60);
let secs = Math.floor(seconds - hours * 3600 - minutes * 60);
let msecs = Math.floor(
(seconds - hours * 3600 - minutes * 60 - secs) * 1000
);
return `${hours}:${minutes}:${secs}.${msecs}`;
}
// table shows the timers for the other users
let stateFetcherHandler = setInterval(() => {
fetch(rootUrl + "get_state").then(async (resp) => {
console.log(resp.status);
if (resp.status == 200) {
let htmlBuffer = "";
const obj = await resp.json();
// turn object into array
let arr = [];
for (let i = 0; i < Object.entries(obj).length; i++) {
let e = Object.entries(obj)[i];
arr[e[0]] = parseFloat(e[1]);
}
// sort assoc array
const keys = Object.keys(arr);
let arrSorted = [];
arr = keys
.sort((a, b) => arr[b] - arr[a])
.forEach((k) => (arrSorted[k] = arr[k]));
console.log(obj, arrSorted);
for (let aUser in arrSorted) {
if (user == aUser) continue;
let secs = parseFloat(arrSorted[aUser]);
htmlBuffer +=
`<tr><td class='label'>${aUser}</td> <td>` +
formatTime(secs) +
"</td></tr>";
}
document.getElementById("general_status").innerHTML = htmlBuffer;
} else {
console.log(await resp.json());
clearInterval(stateFetcherHandler);
}
});
}, 1000);
function startCounter(evt) {
console.log(">startCounter", evt.target);
document.title += " (ticking)";
message = {
user: user,
action: "startedTimer",
page: location.href,
text: "",
};
ws.send(JSON.stringify(message));
if (lastStart == null) {
start = new Date();
} else {
console.log("lastStart", lastStart);
if (stopTime == null) {
stopTime = new Date();
}
start = new Date(lastStart.getTime() + (new Date() - stopTime));
}
intervalId = setInterval(() => {
diff = (new Date() - start) / 1000;
document.getElementById("counter").textContent = formatTime(diff);
}, 100);
storerHandler = setInterval(async () => {
console.log("syncing...");
let lasted_syncs = diff;
if (lasted_syncs < 0) return;
localStorage.setItem("lasted_secs", lasted_syncs);
let resp = await fetch(
rootUrl + "store_state?" +
new URLSearchParams({ user: user, lasted_secs: diff }),
{
method: "GET",
}
);
console.log(resp.status);
if (resp.status == 200) {
console.log("The value '" + diff + "' was stored successfully");
}
//console.log(await resp.json());
}, 2500);
let buttonEl = evt.target;
console.log(buttonEl);
buttonEl.removeEventListener("click", startCounter);
buttonEl.addEventListener("click", stopCounter);
buttonEl.innerHTML = "Stop";
}
function stopCounter(evt) {
let tit = document.title;
let newTit = tit.replace("(ticking)", "");
document.title = newTit;
console.log(">stopCounter", evt);
clearInterval(intervalId);
clearInterval(storerHandler);
stopTime = new Date();
lastStart = start;
let buttonEl = evt.target;
buttonEl.removeEventListener("click", stopCounter);
buttonEl.addEventListener("click", startCounter);
buttonEl.innerHTML = "Start";
console.log("syncing...");
let lasted_syncs = diff;
if (lasted_syncs < 0) return;
fetch(
rootUrl + "store_state?" +
new URLSearchParams({ user: user, lasted_secs: diff })
);
}
function resetCounter() {
start = new Date();
lastStart = null;
document.getElementById("counter").textContent = formatTime(0);
}
</script>
</html>