Refactor frontend to use ES modules
This commit is contained in:
parent
caf96d1d04
commit
8da286fad9
7 changed files with 388 additions and 333 deletions
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@ -47,6 +47,6 @@
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</form>
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</div>
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<script src="/main.js?v=2"></script>
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<script type="module" src="/main.mjs?v=1"></script>
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</body>
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</html>
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102
frontend/lib/chat.mjs
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102
frontend/lib/chat.mjs
Normal file
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@ -0,0 +1,102 @@
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const setupChatboxEvents = (socket) => {
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// clear events by just reconstructing the form
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const oldChatForm = document.querySelector("#chatbox-send");
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const chatForm = oldChatForm.cloneNode(true);
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oldChatForm.replaceWith(chatForm);
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chatForm.addEventListener("submit", (e) => {
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e.preventDefault();
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const input = chatForm.querySelector("input");
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const content = input.value;
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if (content.trim().length) {
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input.value = "";
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socket.send(
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JSON.stringify({
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op: "ChatMessage",
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data: {
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message: content,
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},
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})
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);
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}
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});
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};
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const fixChatSize = () => {
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const video = document.querySelector("video");
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const chatbox = document.querySelector("#chatbox");
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const chatboxContainer = document.querySelector("#chatbox-container");
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if (video && chatbox && chatboxContainer) {
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const delta = chatboxContainer.clientHeight - chatbox.clientHeight;
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chatbox.style["height"] = `calc(${
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window.innerHeight - video.clientHeight
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}px - ${delta}px - 1em)`;
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}
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};
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/**
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* @param {WebSocket} socket
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*/
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export const setupChat = async (socket) => {
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document.querySelector("#chatbox-container").style["display"] = "block";
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setupChatboxEvents(socket);
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fixChatSize();
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window.addEventListener("resize", () => {
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fixChatSize();
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});
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};
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const printToChat = (elem) => {
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const chatbox = document.querySelector("#chatbox");
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chatbox.appendChild(elem);
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chatbox.scrollTop = chatbox.scrollHeight;
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};
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export const handleChatEvent = (event) => {
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switch (event.op) {
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case "UserJoin": {
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// print something to the chat
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const chatMessage = document.createElement("div");
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chatMessage.classList.add("chat-message");
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chatMessage.classList.add("user-join");
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const userName = document.createElement("strong");
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userName.textContent = event.data;
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chatMessage.appendChild(userName);
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chatMessage.appendChild(document.createTextNode(" joined"));
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printToChat(chatMessage);
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break;
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}
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case "UserLeave": {
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const chatMessage = document.createElement("div");
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chatMessage.classList.add("chat-message");
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chatMessage.classList.add("user-leave");
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const userName = document.createElement("strong");
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userName.textContent = event.data;
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chatMessage.appendChild(userName);
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chatMessage.appendChild(document.createTextNode(" left"));
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printToChat(chatMessage);
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break;
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}
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case "ChatMessage": {
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const chatMessage = document.createElement("div");
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chatMessage.classList.add("chat-message");
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const userName = document.createElement("strong");
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userName.innerText = event.data.user;
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chatMessage.appendChild(userName);
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chatMessage.appendChild(document.createTextNode(" "));
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const messageContent = document.createElement("span");
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messageContent.classList.add("message-content");
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messageContent.textContent = event.data.message;
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chatMessage.appendChild(messageContent);
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printToChat(chatMessage);
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break;
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}
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}
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};
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45
frontend/lib/join-session.mjs
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45
frontend/lib/join-session.mjs
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@ -0,0 +1,45 @@
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import { joinSession } from "./watch-session.mjs";
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/**
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* @param {HTMLInputElement} field
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*/
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const loadNickname = (field) => {
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try {
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const savedNickname = localStorage.getItem("watch-party-nickname");
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field.value = savedNickname;
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} catch (_err) {
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// Sometimes localStorage is blocked from use
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}
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};
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/**
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* @param {HTMLInputElement} field
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*/
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const saveNickname = (field) => {
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try {
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localStorage.setItem("watch-party-nickname", field.value);
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} catch (_err) {
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// see loadNickname
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}
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};
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export const setupJoinSessionForm = () => {
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const form = document.querySelector("#join-session-form");
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const nickname = form.querySelector("#join-session-nickname");
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const sessionId = form.querySelector("#join-session-id");
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loadNickname(nickname);
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if (window.location.hash.match(/#[0-9a-f\-]+/)) {
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sessionId.value = window.location.hash.substring(1);
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}
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document
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.querySelector("#join-session-form")
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.addEventListener("submit", (event) => {
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event.preventDefault();
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saveNickname(nickname);
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joinSession(nickname.value, sessionId.value);
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});
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};
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58
frontend/lib/video.mjs
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58
frontend/lib/video.mjs
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@ -0,0 +1,58 @@
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/**
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* @param {string} videoUrl
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* @param {{name: string, url: string}[]} subtitles
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*/
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const createVideoElement = (videoUrl, subtitles) => {
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const video = document.createElement("video");
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video.controls = true;
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video.autoplay = false;
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video.crossOrigin = "anonymous";
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const source = document.createElement("source");
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source.src = videoUrl;
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video.appendChild(source);
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let first = true;
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for (const { name, url } of subtitles) {
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const track = document.createElement("track");
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track.label = name;
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track.src = url;
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track.kind = "captions";
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if (first) {
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track.default = true;
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first = false;
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}
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video.appendChild(track);
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}
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return video;
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};
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/**
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* @param {string} videoUrl
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* @param {{name: string, url: string}[]} subtitles
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* @param {number} currentTime
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* @param {boolean} playing
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*/
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export const setupVideo = async (videoUrl, subtitles, currentTime, playing) => {
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document.querySelector("#pre-join-controls").style["display"] = "none";
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const video = createVideoElement(videoUrl, subtitles);
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document.querySelector("#video-container").appendChild(video);
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video.currentTime = currentTime / 1000.0;
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try {
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if (playing) {
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await video.play();
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} else {
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video.pause();
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}
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} catch (err) {
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// Auto-play is probably disabled, we should uhhhhhhh do something about it
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}
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return video;
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};
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171
frontend/lib/watch-session.mjs
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171
frontend/lib/watch-session.mjs
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@ -0,0 +1,171 @@
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import { setupVideo } from "./video.mjs";
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import { setupChat, handleChatEvent } from "./chat.mjs";
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/**
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* @param {string} sessionId
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* @param {string} nickname
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* @returns {WebSocket}
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*/
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const createWebSocket = (sessionId, nickname) => {
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const wsUrl = new URL(
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`/sess/${sessionId}/subscribe` +
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`?nickname=${encodeURIComponent(nickname)}`,
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window.location.href
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);
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wsUrl.protocol = { "http:": "ws:", "https:": "wss:" }[wsUrl.protocol];
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const socket = new WebSocket(wsUrl.toString());
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return socket;
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};
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let outgoingDebounce = false;
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let outgoingDebounceCallbackId = null;
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const setDebounce = () => {
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outgoingDebounce = true;
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if (outgoingDebounceCallbackId) {
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cancelIdleCallback(outgoingDebounceCallbackId);
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outgoingDebounceCallbackId = null;
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}
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outgoingDebounceCallbackId = setTimeout(() => {
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outgoingDebounce = false;
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}, 500);
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};
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/**
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* @param {HTMLVideoElement} video
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* @param {WebSocket} socket
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*/
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const setupIncomingEvents = (video, socket) => {
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const setVideoTime = (time) => {
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const timeSecs = time / 1000.0;
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if (Math.abs(video.currentTime - timeSecs) > 0.5) {
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video.currentTime = timeSecs;
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}
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};
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socket.addEventListener("message", async (messageEvent) => {
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try {
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const event = JSON.parse(messageEvent.data);
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// console.log(event);
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switch (event.op) {
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case "SetPlaying":
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setDebounce();
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if (event.data.playing) {
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await video.play();
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} else {
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video.pause();
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}
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setVideoTime(event.data.time);
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break;
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case "SetTime":
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setDebounce();
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setVideoTime(event.data);
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break;
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case "UserJoin":
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case "UserLeave":
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case "ChatMessage":
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handleChatEvent(event);
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break;
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}
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} catch (_err) {}
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});
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};
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/**
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* @param {HTMLVideoElement} video
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* @param {WebSocket} socket
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*/
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const setupOutgoingEvents = (video, socket) => {
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const currentVideoTime = () => (video.currentTime * 1000) | 0;
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video.addEventListener("pause", async (event) => {
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if (outgoingDebounce) {
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return;
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}
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socket.send(
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JSON.stringify({
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op: "SetPlaying",
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data: {
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playing: false,
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time: currentVideoTime(),
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},
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})
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);
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});
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video.addEventListener("play", (event) => {
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if (outgoingDebounce) {
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return;
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}
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socket.send(
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JSON.stringify({
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op: "SetPlaying",
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data: {
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playing: true,
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time: currentVideoTime(),
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},
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})
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);
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});
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let firstSeekComplete = false;
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video.addEventListener("seeked", async (event) => {
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if (!firstSeekComplete) {
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// The first seeked event is performed by the browser when the video is loading
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firstSeekComplete = true;
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return;
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}
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if (outgoingDebounce) {
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return;
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}
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socket.send(
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JSON.stringify({
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op: "SetTime",
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data: currentVideoTime(),
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})
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);
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});
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};
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/**
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* @param {string} nickname
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* @param {string} sessionId
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*/
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export const joinSession = async (nickname, sessionId) => {
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try {
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window.location.hash = sessionId;
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const { video_url, subtitle_tracks, current_time_ms, is_playing } =
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await fetch(`/sess/${sessionId}`).then((r) => r.json());
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const socket = createWebSocket(sessionId, nickname);
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socket.addEventListener("open", async () => {
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const video = await setupVideo(
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video_url,
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subtitle_tracks,
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current_time_ms,
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is_playing
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);
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setupOutgoingEvents(video, socket);
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setupIncomingEvents(video, socket);
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setupChat(socket);
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});
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// TODO: Close listener ?
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} catch (err) {
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// TODO: Show an error on the screen
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console.error(err);
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}
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};
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332
frontend/main.js
332
frontend/main.js
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@ -1,332 +0,0 @@
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/**
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* @param {string} videoUrl
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* @param {{name: string, url: string}[]} subtitles
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*/
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const createVideoElement = (videoUrl, subtitles) => {
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const video = document.createElement("video");
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video.controls = true;
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video.autoplay = false;
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video.crossOrigin = "anonymous";
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const source = document.createElement("source");
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source.src = videoUrl;
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video.appendChild(source);
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let first = true;
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for (const { name, url } of subtitles) {
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const track = document.createElement("track");
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track.label = name;
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track.src = url;
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track.kind = "captions";
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if (first) {
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track.default = true;
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first = false;
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}
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video.appendChild(track);
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}
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return video;
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}
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let outgoingDebounce = false;
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let outgoingDebounceCallbackId = null;
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const setDebounce = () => {
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outgoingDebounce = true;
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if (outgoingDebounceCallbackId) {
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cancelIdleCallback(outgoingDebounceCallbackId);
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outgoingDebounceCallbackId = null;
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}
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outgoingDebounceCallbackId = setTimeout(() => {
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outgoingDebounce = false;
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}, 500);
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}
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const clearChat = () => {
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document.querySelector("#chatbox").innerHTML = "";
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}
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const printToChat = (elem) => {
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const chatbox = document.querySelector("#chatbox");
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chatbox.appendChild(elem);
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chatbox.scrollTop = chatbox.scrollHeight;
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}
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const handleChatEvent = (event) => {
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switch (event.op) {
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case "UserJoin": {
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// print something to the chat
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const chatMessage = document.createElement("div");
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chatMessage.classList.add("chat-message");
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chatMessage.classList.add("user-join");
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const userName = document.createElement("strong");
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userName.textContent = event.data;
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chatMessage.appendChild(userName);
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chatMessage.appendChild(document.createTextNode(" joined"));
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printToChat(chatMessage);
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break;
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}
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case "UserLeave": {
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const chatMessage = document.createElement("div");
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chatMessage.classList.add("chat-message");
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chatMessage.classList.add("user-leave");
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const userName = document.createElement("strong");
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userName.textContent = event.data;
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chatMessage.appendChild(userName);
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chatMessage.appendChild(document.createTextNode(" left"));
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printToChat(chatMessage);
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break;
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}
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case "ChatMessage": {
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const chatMessage = document.createElement("div");
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chatMessage.classList.add("chat-message");
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const userName = document.createElement("strong");
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userName.innerText = event.data.user;
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chatMessage.appendChild(userName);
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chatMessage.appendChild(document.createTextNode(" "));
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const messageContent = document.createElement("span");
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messageContent.classList.add("message-content");
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messageContent.textContent = event.data.message;
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chatMessage.appendChild(messageContent);
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printToChat(chatMessage);
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break;
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}
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}
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}
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/**
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* @param {WebSocket} socket
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* @param {HTMLVideoElement} video
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*/
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const setupSocketEvents = (socket, video) => {
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const setVideoTime = time => {
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const timeSecs = time / 1000.0;
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if (Math.abs(video.currentTime - timeSecs) > 0.5) {
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video.currentTime = timeSecs;
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}
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}
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socket.addEventListener("message", async messageEvent => {
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try {
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const event = JSON.parse(messageEvent.data);
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console.log(event);
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switch (event.op) {
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case "SetPlaying":
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setDebounce();
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if (event.data.playing) {
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await video.play();
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} else {
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video.pause();
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}
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setVideoTime(event.data.time);
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break;
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case "SetTime":
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setDebounce();
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setVideoTime(event.data);
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break;
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case "UserJoin":
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case "UserLeave":
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case "ChatMessage":
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handleChatEvent(event);
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break;
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}
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} catch (_err) {
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}
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});
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}
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/**
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* @param {string} sessionId
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* @param {HTMLVideoElement} video
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* @param {WebSocket} socket
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||||
*/
|
||||
const setupVideoEvents = (sessionId, video, socket) => {
|
||||
const currentVideoTime = () => (video.currentTime * 1000) | 0;
|
||||
|
||||
video.addEventListener("pause", async event => {
|
||||
if (outgoingDebounce) {
|
||||
return;
|
||||
}
|
||||
|
||||
socket.send(JSON.stringify({
|
||||
"op": "SetPlaying",
|
||||
"data": {
|
||||
"playing": false,
|
||||
"time": currentVideoTime(),
|
||||
}
|
||||
}));
|
||||
});
|
||||
|
||||
video.addEventListener("play", event => {
|
||||
if (outgoingDebounce) {
|
||||
return;
|
||||
}
|
||||
|
||||
socket.send(JSON.stringify({
|
||||
"op": "SetPlaying",
|
||||
"data": {
|
||||
"playing": true,
|
||||
"time": currentVideoTime(),
|
||||
}
|
||||
}));
|
||||
});
|
||||
|
||||
let firstSeekComplete = false;
|
||||
video.addEventListener("seeked", async event => {
|
||||
if (!firstSeekComplete) {
|
||||
// The first seeked event is performed by the browser when the video is loading
|
||||
firstSeekComplete = true;
|
||||
return;
|
||||
}
|
||||
|
||||
if (outgoingDebounce) {
|
||||
return;
|
||||
}
|
||||
|
||||
socket.send(JSON.stringify({
|
||||
"op": "SetTime",
|
||||
"data": currentVideoTime(),
|
||||
}));
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* @param {string} videoUrl
|
||||
* @param {{name: string, url: string}[]} subtitles
|
||||
* @param {number} currentTime
|
||||
* @param {boolean} playing
|
||||
* @param {WebSocket} socket
|
||||
*/
|
||||
const setupVideo = async (sessionId, videoUrl, subtitles, currentTime, playing, socket) => {
|
||||
document.querySelector("#pre-join-controls").style["display"] = "none";
|
||||
const video = createVideoElement(videoUrl, subtitles);
|
||||
document.querySelector("#video-container").appendChild(video);
|
||||
|
||||
video.currentTime = (currentTime / 1000.0);
|
||||
|
||||
try {
|
||||
if (playing) {
|
||||
await video.play()
|
||||
} else {
|
||||
video.pause()
|
||||
}
|
||||
} catch (err) {
|
||||
// Auto-play is probably disabled, we should uhhhhhhh do something about it
|
||||
}
|
||||
|
||||
setupSocketEvents(socket, video);
|
||||
setupVideoEvents(sessionId, video, socket);
|
||||
}
|
||||
|
||||
const fixChatSize = () => {
|
||||
const video = document.querySelector("video");
|
||||
const chatbox = document.querySelector("#chatbox");
|
||||
const chatboxContainer = document.querySelector("#chatbox-container");
|
||||
|
||||
if (video && chatbox && chatboxContainer) {
|
||||
const delta = chatboxContainer.clientHeight - chatbox.clientHeight;
|
||||
|
||||
chatbox.style["height"] = `calc(${(window.innerHeight - video.clientHeight)}px - ${delta}px - 1em)`;
|
||||
}
|
||||
};
|
||||
|
||||
const setupChatboxEvents = (socket) => {
|
||||
// clear events by just reconstructing the form
|
||||
const oldChatForm = document.querySelector("#chatbox-send");
|
||||
const chatForm = oldChatForm.cloneNode(true);
|
||||
oldChatForm.replaceWith(chatForm);
|
||||
|
||||
chatForm.addEventListener("submit", e => {
|
||||
e.preventDefault();
|
||||
|
||||
const input = chatForm.querySelector("input");
|
||||
const content = input.value;
|
||||
if (content.trim().length) {
|
||||
input.value = "";
|
||||
|
||||
socket.send(JSON.stringify({
|
||||
"op": "ChatMessage",
|
||||
"data": {
|
||||
"message": content,
|
||||
}
|
||||
}));
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* @param {string} sessionId
|
||||
* @param {WebSocket} socket
|
||||
*/
|
||||
const setupChat = async (sessionId, socket) => {
|
||||
document.querySelector("#chatbox-container").style["display"] = "block";
|
||||
setupChatboxEvents(socket);
|
||||
fixChatSize();
|
||||
}
|
||||
|
||||
/**
|
||||
* @param {string} nickname
|
||||
* @param {string} sessionId
|
||||
*/
|
||||
const joinSession = async (nickname, sessionId) => {
|
||||
try {
|
||||
window.location.hash = sessionId;
|
||||
|
||||
const {
|
||||
video_url, subtitle_tracks,
|
||||
current_time_ms, is_playing
|
||||
} = await fetch(`/sess/${sessionId}`).then(r => r.json());
|
||||
|
||||
const wsUrl = new URL(`/sess/${sessionId}/subscribe?nickname=${encodeURIComponent(nickname)}`, window.location.href);
|
||||
wsUrl.protocol = { "http:": "ws:", "https:": "wss:" }[wsUrl.protocol];
|
||||
const socket = new WebSocket(wsUrl.toString());
|
||||
|
||||
socket.addEventListener("open", () => {
|
||||
setupVideo(sessionId, video_url, subtitle_tracks, current_time_ms, is_playing, socket);
|
||||
setupChat(sessionId, socket);
|
||||
});
|
||||
} catch (err) {
|
||||
// TODO: Show an error on the screen
|
||||
console.error(err);
|
||||
}
|
||||
}
|
||||
|
||||
const main = () => {
|
||||
document.querySelector("#join-session-nickname").value = localStorage.getItem("watch-party-nickname");
|
||||
|
||||
document.querySelector("#join-session-form").addEventListener("submit", event => {
|
||||
event.preventDefault();
|
||||
|
||||
const nickname = document.querySelector("#join-session-nickname").value;
|
||||
const sessionId = document.querySelector("#join-session-id").value;
|
||||
|
||||
localStorage.setItem("watch-party-nickname", nickname);
|
||||
joinSession(nickname, sessionId);
|
||||
});
|
||||
|
||||
if (window.location.hash.match(/#[0-9a-f\-]+/)) {
|
||||
document.querySelector("#join-session-id").value = window.location.hash.substring(1);
|
||||
}
|
||||
|
||||
window.addEventListener("resize", event => {
|
||||
fixChatSize();
|
||||
});
|
||||
};
|
||||
|
||||
if (document.readyState === "complete") {
|
||||
main();
|
||||
} else {
|
||||
document.addEventListener("DOMContentLoaded", main);
|
||||
}
|
||||
11
frontend/main.mjs
Normal file
11
frontend/main.mjs
Normal file
|
|
@ -0,0 +1,11 @@
|
|||
import { setupJoinSessionForm } from "./lib/join-session.mjs";
|
||||
|
||||
const main = () => {
|
||||
setupJoinSessionForm();
|
||||
};
|
||||
|
||||
if (document.readyState === "complete") {
|
||||
main();
|
||||
} else {
|
||||
document.addEventListener("DOMContentLoaded", main);
|
||||
}
|
||||
Loading…
Reference in a new issue