Scripts by Josh Davenport-Smith

bandcamp-album-player


// Name: Bandcamp Album Player
// Description: Stream a bandcamp album
// Author: Josh Davenport-Smith
// Twitter: @jdprts

import "@johnlindquist/kit";
import { WidgetAPI } from "@johnlindquist/kit/types/pro";
const jsdom = await npm('jsdom');

const INITIAL_PLAYER_WIDTH = 500;
const MAX_PLAYER_WIDTH = 740;
const INITIAL_PLAYER_HEIGHT = 120;

const htmlDecode = (input: string) => {
    const doc = new jsdom.JSDOM(`<!DOCTYPE html><div>${input}</div>`);
    return doc.window.document.querySelector('div').textContent;
}

const getStyles = () => `
:root {
    --dragbar-width: 30px;
}

iframe {
    position: absolute;
    left: var(--dragbar-width);
    top: 0;
    width: calc(100% - var(--dragbar-width));
    height: 100%;
    -webkit-app-region: no-drag;
}

#dragbar {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--dragbar-width);
    cursor: grab;
    background: #F1F1F1;
}

#dragbar:after {
    content: '';
    position: absolute;
    inset: 6px;
    background: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI1IiBoZWlnaHQ9IjUiPgo8cmVjdCB3aWR0aD0iNSIgaGVpZ2h0PSI1IiBmaWxsPSIjRjFGMUYxIj48L3JlY3Q+CjxyZWN0IHdpZHRoPSIyIiBoZWlnaHQ9IjIiIGZpbGw9IiNjY2MiPjwvcmVjdD4KPC9zdmc+");
}

#dragbar:active {
    cursor: grabbing;
}
`;

const getScripts = (albumId: number) => `
(() => {
    const url = 'https://bandcamp.com/EmbeddedPlayer/album=${albumId}/size=large/bgcol=ffffff/linkcol=0687f5/tracklist=false/artwork=small/transparent=true/';
    const iframe = document.createElement('iframe');
    iframe.setAttribute('src', url);
    iframe.setAttribute('seamless', true);
    document.body.appendChild(iframe);
})();
`;

// Obtain the album (or track) URL
const albumUrl = await arg('What is the album URL?');

// Bail if the URL is invalid
if (!albumUrl.includes('bandcamp.com/album') && !albumUrl.includes('bandcamp.com/track')) {
    throw new Error('Sorry, I don\'t recognise that URL');
}

// Give feedback that we're metadata for the album
div(md(`
Loading album...
---
Note: Some URLs will not work because of permissions set by the artist
`));

// Grab the bandcamp page for bc-page-properties which stores meta about the album
const pageContents = await fetch(albumUrl).then((res) => res.text());
const bandcampMetaParse = pageContents.match(/<meta name="bc-page-properties".*?content="([^"]+)">/);

await Promise.all([
    // Give the user a chance to read the message (some URLs will not work and there's no obious way to tell in advance)
    new Promise((resolve) => setTimeout(resolve, 2000)),
    // Also wait for the data to load, so we continue when both promises resolve
    pageContents,
])

if (!bandcampMetaParse) {
    throw new Error('Sorry, I couldn\'t find the album ID');
}

// Parse the meta we found
const bandcampMeta: { item_type?: string, item_id?: number, tralbum_page_version?: number } | undefined = JSON.parse(htmlDecode(bandcampMetaParse[1]));

if (!bandcampMeta?.item_id) {
    throw new Error('Sorry, I couldn\'t find the album ID');
}

// Create a widget with the player!
const w: WidgetAPI = await widget(
    `
<div id="dragbar"></div>
<style type="text/css">${getStyles()}</style>
<script type="text/javascript">${getScripts(bandcampMeta.item_id)}</script>
    `,
    { 
        alwaysOnTop: true, 
        width: INITIAL_PLAYER_WIDTH, 
        maxWidth: MAX_PLAYER_WIDTH,
        height: INITIAL_PLAYER_HEIGHT, 
        minHeight: INITIAL_PLAYER_HEIGHT, 
        maxHeight: INITIAL_PLAYER_HEIGHT,
        roundedCorners: false,
        thickFrame: false,
    }
);

w.setSize(INITIAL_PLAYER_WIDTH, INITIAL_PLAYER_HEIGHT);
Josh Davenport-Smith

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