watch-party/frontend/lib/chat.mjs

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import { setDebounce, setVideoTime, setPlaying } from "./watch-session.mjs?v=9";
import { emojify, emojis } from "./emojis.mjs?v=9";
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const setupChatboxEvents = (socket) => {
// clear events by just reconstructing the form
const oldChatForm = document.querySelector("#chatbox-send");
const chatForm = oldChatForm.cloneNode(true);
const messageInput = chatForm.querySelector("input");
const emojiAutocomplete = chatForm.querySelector("#emoji-autocomplete");
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oldChatForm.replaceWith(chatForm);
let autocompleting = false;
const replaceMessage = message => () => {
messageInput.value = message;
autocomplete();
}
async function autocomplete(){
if(autocompleting) return;
emojiAutocomplete.textContent = "";
autocompleting = true;
let text = messageInput.value.slice(0, messageInput.selectionStart);
const match = text.match(/(:[^\s:]+)?:[^\s:]*$/);
if(!match || match[1]) return autocompleting = false; // We don't need to autocomplete.
const prefix = text.slice(0, match.index);
const search = text.slice(match.index + 1);
const suffix = messageInput.value.slice(messageInput.selectionStart);
emojiAutocomplete.append(...(await emojis).filter(e => e.toLowerCase().startsWith(search.toLowerCase())).map(e => Object.assign(document.createElement("button"), {className: "emoji-option", textContent: e, onclick: replaceMessage(prefix + ":" + e + ":" + suffix)})))
autocompleting = false;
}
messageInput.addEventListener("input", autocomplete)
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chatForm.addEventListener("submit", async (e) => {
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e.preventDefault();
const content = messageInput.value;
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if (content.trim().length) {
messageInput.value = "";
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// handle commands
if (content.startsWith("/")) {
const command = content.toLowerCase().match(/^\/\S+/)[0];
const args = content.slice(command.length).trim();
let handled = false;
switch (command) {
case "/ping":
socket.send(
JSON.stringify({
op: "Ping",
data: args,
})
);
handled = true;
break;
case "/sync":
const sessionId = window.location.hash.slice(1);
const { current_time_ms, is_playing } = await fetch(
`/sess/${sessionId}`
).then((r) => r.json());
setDebounce();
setPlaying(is_playing);
setVideoTime(current_time_ms);
const syncMessageContent = document.createElement("span");
syncMessageContent.appendChild(
document.createTextNode("resynced you to ")
);
syncMessageContent.appendChild(
document.createTextNode(formatTime(current_time_ms))
);
printChatMessage("set-time", "/sync", "b57fdc", syncMessageContent);
handled = true;
break;
case "/help":
const helpMessageContent = document.createElement("span");
helpMessageContent.innerHTML =
"Available commands:<br>" +
"&emsp;<code>/help</code> - display this help message<br>" +
"&emsp;<code>/ping [message]</code> - ping all viewers<br>" +
"&emsp;<code>/sync</code> - resyncs you with other viewers";
printChatMessage("command-message", "/help", "b57fdc", helpMessageContent);
handled = true;
break;
default:
break;
}
if (handled) {
return;
}
}
// handle regular chat messages
socket.send(
JSON.stringify({
op: "ChatMessage",
data: content,
})
);
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}
});
};
/**
* @param {WebSocket} socket
*/
export const setupChat = async (socket) => {
document.querySelector("#chatbox-container").style["display"] = "flex";
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setupChatboxEvents(socket);
window.addEventListener("keydown", (event) => {
try {
const isSelectionEmpty = window.getSelection().toString().length === 0;
if (event.code.match(/Key\w/) && isSelectionEmpty)
messageInput.focus();
} catch (_err) {}
});
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};
const addToChat = (node) => {
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const chatbox = document.querySelector("#chatbox");
chatbox.appendChild(node);
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chatbox.scrollTop = chatbox.scrollHeight;
};
let lastTimeMs = null;
let lastPlaying = false;
const checkDebounce = (event) => {
let timeMs = null;
let playing = null;
if (event.op == "SetTime") {
timeMs = event.data;
} else if (event.op == "SetPlaying") {
timeMs = event.data.time;
playing = event.data.playing;
}
let shouldIgnore = false;
if (timeMs != null) {
if (lastTimeMs && Math.abs(lastTimeMs - timeMs) < 500) {
shouldIgnore = true;
}
lastTimeMs = timeMs;
}
if (playing != null) {
if (lastPlaying != playing) {
shouldIgnore = false;
}
lastPlaying = playing;
}
return shouldIgnore;
};
/**
* @returns {string}
*/
const getCurrentTimestamp = () => {
const t = new Date();
return `${matpad(t.getHours())}:${matpad(t.getMinutes())}:${matpad(
t.getSeconds()
)}`;
};
/**
* https://media.discordapp.net/attachments/834541919568527361/931678814751301632/66d2c68c48daa414c96951381665ec2e.png
*/
const matpad = (n) => {
return ("00" + n).slice(-2);
};
/**
* @param {string} eventType
* @param {string?} user
* @param {Node?} content
*/
const printChatMessage = (eventType, user, colour, content) => {
const chatMessage = document.createElement("div");
chatMessage.classList.add("chat-message");
chatMessage.classList.add(eventType);
chatMessage.title = getCurrentTimestamp();
if (user != null) {
const userName = document.createElement("strong");
userName.style = `--user-color: #${colour}`;
userName.textContent = user;
chatMessage.appendChild(userName);
}
chatMessage.appendChild(document.createTextNode(" "));
if (content != null) {
chatMessage.appendChild(content);
}
addToChat(chatMessage);
return chatMessage;
};
const formatTime = (ms) => {
const seconds = Math.floor((ms / 1000) % 60);
const minutes = Math.floor((ms / (60 * 1000)) % 60);
const hours = Math.floor((ms / (3600 * 1000)) % 3600);
return `${hours < 10 ? "0" + hours : hours}:${
minutes < 10 ? "0" + minutes : minutes
}:${seconds < 10 ? "0" + seconds : seconds}`;
};
export const logEventToChat = (event) => {
if (checkDebounce(event)) {
return;
}
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switch (event.op) {
case "UserJoin": {
printChatMessage(
"user-join",
event.user,
event.colour,
document.createTextNode("joined")
);
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break;
}
case "UserLeave": {
printChatMessage(
"user-leave",
event.user,
event.colour,
document.createTextNode("left")
);
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break;
}
case "ChatMessage": {
const messageContent = document.createElement("span");
messageContent.classList.add("message-content");
messageContent.append(...emojify(event.data));
printChatMessage(
"chat-message",
event.user,
event.colour,
messageContent
);
break;
}
case "SetTime": {
const messageContent = document.createElement("span");
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if (event.data.from != undefined) {
messageContent.appendChild(
document.createTextNode("set the time from ")
);
messageContent.appendChild(
document.createTextNode(formatTime(event.data.from))
);
messageContent.appendChild(document.createTextNode(" to "));
} else {
messageContent.appendChild(document.createTextNode("set the time to "));
}
messageContent.appendChild(
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document.createTextNode(formatTime(event.data.to))
);
printChatMessage("set-time", event.user, event.colour, messageContent);
break;
}
case "SetPlaying": {
const messageContent = document.createElement("span");
messageContent.appendChild(
document.createTextNode(
event.data.playing ? "started playing" : "paused"
)
);
messageContent.appendChild(document.createTextNode(" at "));
messageContent.appendChild(
document.createTextNode(formatTime(event.data.time))
);
printChatMessage("set-playing", event.user, event.colour, messageContent);
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break;
}
case "Ping": {
const messageContent = document.createElement("span");
if (event.data) {
messageContent.appendChild(document.createTextNode("pinged saying: "));
messageContent.appendChild(document.createTextNode(event.data));
} else {
messageContent.appendChild(document.createTextNode("pinged"));
}
printChatMessage("ping", event.user, event.colour, messageContent);
beep();
break;
}
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}
};
const beep = () => {
const context = new AudioContext();
const gain = context.createGain();
gain.connect(context.destination);
gain.gain.value = 0.1;
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const oscillator = context.createOscillator();
oscillator.connect(gain);
oscillator.frequency.value = 520;
oscillator.type = "square";
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oscillator.start(context.currentTime);
oscillator.stop(context.currentTime + 0.22);
};
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export const updateViewerList = (viewers) => {
const listContainer = document.querySelector("#viewer-list");
// empty out the current list
listContainer.innerHTML = "";
// display the updated list
for (const viewer of viewers) {
const viewerElem = document.createElement("div");
const content = document.createElement("strong");
content.textContent = viewer.nickname;
content.style = `--user-color: #${viewer.colour}`;
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viewerElem.appendChild(content);
listContainer.appendChild(viewerElem);
}
};