// ==UserScript==
// @name         Sleek YouTube Downloader
// @namespace    https://github.com/thisismy-github
// @description  A simple tool that adds YouTube-style buttons for multi-format downloading. Lighter than most download scripts.
// @author       thisismy-github
// @match        https://www.youtube.com/
// @match        https://www.youtube.com/watch*
// @match        https://www.youtube.com/playlist*
// @grant        none
// @license      MIT
// @run-at       document-end
// @version      3.2.0
// ==/UserScript==
// Valid formats: MP4 || MP3, WAV, M4A, WEBM, AAC, FLAC, OPUS, OGG
const buttons = ["MP3", "MP4"];
// There is no consistent variable for border-radius (button roundness) yet.
// Old border-radius: 2px. New border-radius: 20px or higher.
const cssText = `
.download-button {
border-radius: 20px;
display: flex;
flex-direction: row;
cursor: pointer;
background-color: var(--yt-spec-10-percent-layer);
color: var(--yt-spec-text-secondary);
padding: var(--yt-button-padding);
margin: auto var(--ytd-subscribe-button-margin, 4px);
white-space: nowrap;
font-size: var(--ytd-tab-system-font-size, 1.4rem);
font-weight: var(--ytd-tab-system-font-weight, 500);
letter-spacing: var(--ytd-tab-system-letter-spacing, .007px);
text-transform: var(--ytd-tab-system-text-transform, uppercase);
}
.download-button-text {
--yt-formatted-string-deemphasize_-_display: initial;
--yt-formatted-string-deemphasize-color: var(--yt-spec-text-secondary);
--yt-formatted-string-deemphasize_-_margin-left: 4px;
}
.download-button-container {
display: flex;
flex-direction: row;
}
.download-playlist-button {
margin-right: 8px;
margin-left: 0px;
}
.download-playlist-button-text {
color: #E4E4E4;
}
`;
(function() {
'use strict';
window.onload = () => {
// playlist pages will try to add the buttons repeatedly
let playlistButtonsAdded = false;
window.addEventListener("yt-navigate-finish", () => {
setTimeout(() => {
// apply css
const style = document.createElement("style");
style.type = "text/css";
style.innerHTML = cssText;
document.head.appendChild(style);
// check for playlist and create appropriate query
let query = "#analytics-button:not(.download-panel)";
let inPlaylist = location.href.includes("/playlist");
if (inPlaylist && !playlistButtonsAdded) {
query += ", div.metadata-buttons-wrapper:not(.download-panel)";
playlistButtonsAdded = true;
}
document.querySelectorAll(query).forEach(panel => {
// outer container (to flex buttons side-by-side)
const container = document.createElement("div");
container.classList.add("download-button-container");
for (let i = 0; i < buttons.length; i++) {
const button = document.createElement("div");        // button
button.classList.add("download-button");
if (inPlaylist) { button.classList.add("download-playlist-button"); }
button.addEventListener("click", () => {             // download function
let link = encodeURIComponent(location.href);
let format = buttons[i].toLowerCase();
if (format === "mp4") { format = "7"; }
window.open(`https://loader.to/?link=${ link }&f=${ format }&s=1&e=1&r=loader`);
});
const buttonText = document.createElement("span");   // button text
buttonText.classList.add("download-button-text");
if (inPlaylist) { buttonText.classList.add("download-playlist-button-text"); }
buttonText.innerHTML = buttons[i];
button.appendChild(buttonText);                      // append text to button
container.appendChild(button);
}
panel.classList.add("download-panel");
panel.insertBefore(container, panel.firstElementChild);
});
}, 200);
});
};
})();