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ytpl.html
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ytpl.html
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<!--
YouTube Playlist Manager
redbeam_, 2021
version 1.5
python -m http.server 8000
-->
<!DOCTYPE html>
<style>
* {
box-sizing: border-box;
}
body {
margin: 0;
}
img {
vertical-align: bottom;
}
table#videos {
width: 100%;
border-spacing: 4px 6px;
border-collapse: collapse;
}
table#videos td {
white-space: nowrap;
border: 2px solid black;
}
table#videos td:last-child { /* last column in the video table */
position: relative;
width: 100%;
padding-inline: 10px;
}
div#playlist-select {
overflow: auto;
max-height: 75%;
white-space: nowrap;
margin-top: 10px;
font-size: 110%;
}
div#panel {
overflow: auto;
max-height: 100vh;
float: left;
width: 20%;
height: 100vh;
padding: 10px;
background-color: #4E8AFF;
}
div#video-section {
overflow: auto;
float: left;
width: 80%;
height: 100vh;
padding: 10px;
background-color: #7AA7FF;
outline: none;
}
p.videotitle {
margin: 0px;
font-size: 110%;
}
p.videoauthor {
position: absolute;
margin: 3px 0px 0px 0px;
font-size: 80%;
}
</style>
<title>YouTube Playlist Manager</title>
<base target="_blank">
<body>
<div id="panel">
<span id="logged-in-as">Not logged in</span>
<button onclick="GoogleAuth.signOut()">Log out</button>
<br>
<div id="playlist-select"></div>
</div>
<div id="video-section" tabindex="0">
<table id="videos"></table>
</div>
</body>
<script src="https://apis.google.com/js/api.js"></script>
<script>
"use strict";
var loggedInAsSpan = document.getElementById("logged-in-as");
var playlistSelectDiv = document.getElementById("playlist-select");
var videoSectionDiv = document.getElementById("video-section");
var videosTable = document.getElementById("videos");
var GoogleAuth;
var playlistsList = [];
var playlist = [];
var currentPlaylistId = "";
var lastScrollTop = 0;
function initClient() {
gapi.client.init({
"apiKey": "AIzaSyAD0gBUo6_LMIIu3vQahuHRLR-sd1k9rUU",
"clientId": "355524614417-afqng1pok30gtbob7j1ik2e20ef4d0k9.apps.googleusercontent.com",
"scope": "https://www.googleapis.com/auth/youtube.force-ssl",
"discoveryDocs": ["https://www.googleapis.com/discovery/v1/apis/youtube/v3/rest"]
})
.then(function () {
GoogleAuth = gapi.auth2.getAuthInstance();
GoogleAuth.isSignedIn.listen(_ => window.location.reload());
if ( ! GoogleAuth.isSignedIn.get()) {
GoogleAuth.signIn();
console.log("Not logged in; refresh required");
return;
}
console.log("Client initialized");
main();
});
}
function execute_channelList(responseHandler) {
gapi.client.youtube.channels.list({
"part": ["snippet"],
"maxResults": 50,
"mine": true
}).then(responseHandler, function(err) {console.error("execute_channelList error", err); alert("Error encountered; please check the console");});
}
function execute_list(responseHandler) {
gapi.client.youtube.playlists.list({
"part": ["snippet"],
"maxResults": 50,
"mine": true
}).then(responseHandler, function(err) {console.error("execute_list error", err); alert("Error encountered; please check the console");});
}
function execute_playlistItems(responseHandler, playlistId, pageToken="") {
gapi.client.youtube.playlistItems.list({
"part": ["snippet"],
"maxResults": 50,
"playlistId": playlistId,
"pageToken": pageToken
}).then(responseHandler, function(err) {console.error("execute_playlistItems error", err); alert("Error encountered; please check the console");});
}
function execute_update(responseHandler, playlistItemId, playlistId, position, videoId) {
gapi.client.youtube.playlistItems.update({
"part": ["snippet"],
"resource": {
"id": playlistItemId,
"snippet": {
"playlistId": playlistId,
"position": position,
"resourceId": {
"kind": "youtube#video",
"videoId": videoId
}
}
}
}).then(responseHandler, function(err) {console.error("execute_update error", err); alert("Error encountered; please check the console");});
}
function execute_delete(responseHandler, playlistItemId) {
gapi.client.youtube.playlistItems.delete({
"id": playlistItemId
}).then(responseHandler, function(err) {console.error("execute_delete error", err); alert("Error encountered; please check the console");});
}
function getChannelTitle() {
function respHandler(response) {
loggedInAsSpan.innerHTML = `Logged in as: <b>${response.result.items[0].snippet.title}</b>`;
}
execute_channelList(respHandler);
}
function radioSelectPlaylist(radio) {
let playlistInfo = playlistsList[radio.dataset.radioId];
document.title = playlistInfo.docTitle;
loadPlaylist(playlistInfo.id);
}
function populatePlaylistSelect() {
function respHandler(response) {
playlistSelectDiv.replaceChildren(); // removes all children
let items = response.result.items;
items.sort((a, b) => a.snippet.title.localeCompare(b.snippet.title));
for (let i = 0; i < items.length; ++i) {
playlistsList.push({id: items[i].id, docTitle: `${items[i].snippet.title} | ${document.title}`})
playlistSelectDiv.innerHTML +=
`<input type="radio" name="playlist-select-radio" id="radio-${i}" data-radio-id="${i}" onclick="radioSelectPlaylist(this)">
<label for="radio-${i}">${items[i].snippet.title}</label><br>`;
}
}
execute_list(respHandler);
}
function createVideoElem(index) {
let element = document.createElement("tr");
element.id = `video-${index}`;
let td1 = document.createElement("td");
let posBox = document.createElement("input");
posBox.size = 4;
posBox.value = playlist[index].position;
posBox.onchange = event => changePos(playlist[index].position, event.target.value);
td1.appendChild(posBox);
let td2 = document.createElement("td");
let anchor = document.createElement("a");
anchor.href = `https://www.youtube.com/watch?v=${playlist[index].resourceId.videoId}`;
let image = document.createElement("img");
image.loading = "lazy";
image.width = 120;
image.height = 90;
// YouTube's link returns the correct image, but with a 404 error code (https://i.ytimg.com/img/no_thumbnail.jpg)
image.src = playlist[index].thumbnails?.default?.url ?? "https://pbs.twimg.com/media/EwT190HWYAwY12p.jpg";
anchor.appendChild(image);
td2.appendChild(anchor);
let td3 = document.createElement("td");
let title = document.createElement("p");
title.className = "videotitle";
title.textContent = playlist[index].title;
let author = document.createElement("p");
author.className = "videoauthor";
author.textContent = `Author: ${playlist[index].videoOwnerChannelTitle ?? "n/a"}`;
td3.appendChild(title);
td3.appendChild(author);
element.appendChild(td1);
element.appendChild(td2);
element.appendChild(td3);
return element;
}
function populateVideosTable() {
let videoListFragment = document.createDocumentFragment();
for (let i = 0; i < playlist.length; ++i) {
videoListFragment.appendChild(createVideoElem(i));
}
videosTable.replaceChildren(videoListFragment);
}
function loadPlaylist(playlistId) {
function respHandler(response) {
if (currentPlaylistId != playlistId) {
return;
}
var result = response.result;
playlist.push(...result.items);
if (result.nextPageToken != undefined) {
execute_playlistItems(respHandler, playlistId, result.nextPageToken);
} else {
playlist.forEach(x => x.snippet.playlistItemId = x.id);
playlist = playlist.map(x => x.snippet);
populateVideosTable();
videoSectionDiv.scrollTop = lastScrollTop;
videoSectionDiv.focus();
}
}
if (currentPlaylistId != playlistId) {
lastScrollTop = 0;
} else {
lastScrollTop = videoSectionDiv.scrollTop; // remembers the last viewed position
}
playlist = [];
currentPlaylistId = playlistId;
execute_playlistItems(respHandler, playlistId);
}
function changePos(posFrom, posTo) {
if (posTo == "X") {
deleteVideo(posFrom);
return;
}
if ( ! /^[1-9][0-9]*$/.test(posTo) && ! /^[0]$/.test(posTo)) {
alert("Please input a valid number");
return;
}
if (parseInt(posTo) < 0 || parseInt(posTo) >= playlist.length) {
alert("Index not in range");
return;
}
if (posFrom == parseInt(posTo)) {
return;
}
if ( ! confirm(`Change position of video "${playlist[posFrom].title}" from ${posFrom} to ${posTo}?`)) {
return;
}
execute_update(_ => loadPlaylist(currentPlaylistId), playlist[posFrom].playlistItemId, currentPlaylistId, posTo, playlist[posFrom].resourceId.videoId);
}
function deleteVideo(position) {
if ( ! confirm(`Do you really want to delete the video "${playlist[position].title}" on position ${position}?`)) {
return;
}
execute_delete(_ => loadPlaylist(currentPlaylistId), playlist[position].playlistItemId);
}
function main() {
getChannelTitle();
populatePlaylistSelect();
}
gapi.load("client:auth2", initClient); // calls main()
</script>