// ==UserScript==
// @name Import bfan.link releases to MusicBrainz
// @description Import bfan.link smart links with Harmony and add their remaining URL relationships to MusicBrainz. Bfan is Believe Digital's link aggregator service.
// @version 2026.08.15.1
// @author Raman Sinclair
// @namespace https://github.com/murdos/musicbrainz-userscripts/
// @downloadURL https://raw.githubusercontent.com/murdos/musicbrainz-userscripts/dist/bfan_importer.user.js
// @updateURL https://raw.githubusercontent.com/murdos/musicbrainz-userscripts/dist/bfan_importer.user.js
// @match https://bfan.link/*
// @match https://*.bfan.link/*
// @run-at document-idle
// @icon https://raw.githubusercontent.com/murdos/musicbrainz-userscripts/master/assets/images/Musicbrainz_import_logo.png
// ==/UserScript==
(function () {
'use strict';
const HARMONY_SERVICE_PREFERENCE = ['spotify', 'tidal', 'deezer', 'bandcamp', 'apple', 'itunes'];
const TRACKING_PARAMETER_NAMES = new Set(['at', 'ct', 'ffm', 'lid', 'ref', 'ref_', 'src', 'tag']);
const FREE_STREAMING_SERVICES = new Set(['boomplay', 'deezer', 'spotify', 'youtube']);
const STREAMING_SERVICES = new Set(['amazon', 'apple', 'itunes', 'kkbox', 'pandora', 'qobuz', 'soundcloud', 'tidal', 'youtubemusic']);
const URL_RELATIONSHIP_TYPES = {
asin: 77,
purchaseForDownload: 74,
downloadForFree: 75,
otherDatabases: 82,
streamForFree: 85,
streaming: 980
};
function normalizeServiceName(service) {
const normalized = service.trim().toLowerCase().replaceAll(/[^a-z0-9]/g, '');
if (normalized === 'applemusic') return 'apple';
if (normalized === 'amazonmusic') return 'amazon';
if (normalized === 'ytmusic') return 'youtubemusic';
return normalized;
}
function removeTrackingParameters(url) {
for (const name of [...url.searchParams.keys()]) {
if (name.toLowerCase().startsWith('utm_') || TRACKING_PARAMETER_NAMES.has(name.toLowerCase())) {
url.searchParams.delete(name);
}
}
}
/** Produce stable provider URLs suitable for Harmony and exact MusicBrainz URL lookup. */
function normalizeServiceUrl(rawUrl, rawService) {
const service = normalizeServiceName(rawService);
const url = new URL(rawUrl);
const nestedPandoraUrl = url.searchParams.get('$desktop_url');
if (nestedPandoraUrl) return normalizeServiceUrl(nestedPandoraUrl, 'pandora');
url.protocol = 'https:';
url.hash = '';
if (service === 'apple' || service === 'itunes') {
url.hostname = 'music.apple.com';
url.pathname = url.pathname.replace(/\/id(\d+)\/?$/, '/$1');
url.search = '';
} else if (service === 'spotify') {
url.hostname = 'open.spotify.com';
url.search = '';
} else if (service === 'tidal') {
url.hostname = 'tidal.com';
url.search = '';
} else if (service === 'deezer') {
url.hostname = 'www.deezer.com';
url.pathname = url.pathname.replace(/^\/[a-z]{2}\/album\//i, '/album/');
url.search = '';
} else if (service === 'boomplay') {
url.hostname = 'www.boomplay.com';
url.search = '';
} else if (service === 'youtube' || service === 'youtubemusic') {
const list = url.searchParams.get('list');
const video = url.searchParams.get('v');
url.search = '';
if (list) url.searchParams.set('list', list);
if (!list && video) url.searchParams.set('v', video);
} else {
removeTrackingParameters(url);
}
return url.toString();
}
function pathValueAfter(url, segment) {
const parts = url.pathname.split('/').filter(Boolean);
const segmentIndex = parts.indexOf(segment);
if (segmentIndex < 0) return undefined;
return parts.at(-1);
}
function hostnameMatches(url, domain) {
return url.hostname === domain || url.hostname.endsWith(`.${domain}`);
}
function amazonAsinFromUrl(rawUrl) {
try {
const url = new URL(rawUrl);
if (!/(^|\.)amazon\.[a-z]{2,}(\.[a-z]{2})?$/i.test(url.hostname)) return undefined;
const parts = url.pathname.split('/').filter(Boolean);
const asinIndex = parts.findIndex((part, index) => /^(dp|product)$/i.test(part) && index < parts.length - 1);
const asin = asinIndex >= 0 ? parts[asinIndex + 1] : undefined;
return asin && /^[A-Z0-9]{10}$/i.test(asin) ? asin.toUpperCase() : undefined;
} catch {
return undefined;
}
}
/** Identify the provider entity represented by a URL while ignoring storefront and tracking differences. */
function canonicalServiceUrlKey(rawUrl, rawService) {
const service = normalizeServiceName(rawService);
try {
const url = new URL(rawUrl);
let providerId;
switch (service) {
case 'apple':
case 'itunes':
if (!hostnameMatches(url, 'apple.com')) return rawUrl;
providerId = pathValueAfter(url, 'album');
return providerId ? `apple:album:${providerId}` : normalizeServiceUrl(rawUrl, service);
case 'spotify':
if (!hostnameMatches(url, 'spotify.com')) return rawUrl;
providerId = pathValueAfter(url, 'album');
return providerId ? `${service}:album:${providerId}` : normalizeServiceUrl(rawUrl, service);
case 'tidal':
if (!hostnameMatches(url, 'tidal.com')) return rawUrl;
providerId = pathValueAfter(url, 'album');
return providerId ? `${service}:album:${providerId}` : normalizeServiceUrl(rawUrl, service);
case 'deezer':
if (!hostnameMatches(url, 'deezer.com')) return rawUrl;
providerId = pathValueAfter(url, 'album');
return providerId ? `${service}:album:${providerId}` : normalizeServiceUrl(rawUrl, service);
case 'amazon':
case 'amazonstore':
{
const asin = amazonAsinFromUrl(rawUrl);
if (asin) return `amazon:asin:${asin}`;
if (service === 'amazonstore') return normalizeServiceUrl(rawUrl, service);
if (!url.hostname.startsWith('music.amazon.')) return rawUrl;
providerId = pathValueAfter(url, 'albums');
return providerId ? `amazon:album:${providerId}` : normalizeServiceUrl(rawUrl, service);
}
case 'youtube':
case 'youtubemusic':
if (!hostnameMatches(url, 'youtube.com')) return rawUrl;
providerId = url.searchParams.get('list') ?? undefined;
return providerId ? `${service}:playlist:${providerId}` : normalizeServiceUrl(rawUrl, service);
case 'qobuz':
if (!hostnameMatches(url, 'qobuz.com')) return rawUrl;
providerId = pathValueAfter(url, 'album');
return providerId ? `qobuz:album:${providerId}` : normalizeServiceUrl(rawUrl, service);
default:
return normalizeServiceUrl(rawUrl, service);
}
} catch {
return rawUrl;
}
}
function extractReleaseUrlResources(response) {
if (!response || typeof response !== 'object') return [];
const relations = response['relations'];
if (!Array.isArray(relations)) return [];
const resources = [];
for (const relation of relations) {
const resource = relation.url?.resource;
if (resource) resources.push(resource);
}
return resources;
}
function findCanonicallyMatchedLinkUrls(links, releaseResources) {
return links.filter(link => {
const linkKey = canonicalServiceUrlKey(link.url, link.service);
return releaseResources.some(resource => canonicalServiceUrlKey(resource, link.service) === linkKey);
}).map(link => link.url);
}
function isLegacyBoomplayAlbumUrl(rawUrl) {
try {
const url = new URL(rawUrl);
return hostnameMatches(url, 'boomplay.com') && /^\/albums\/\d+\/?$/.test(url.pathname);
} catch {
return false;
}
}
/** Add the current destinations of legacy numeric Boomplay album URLs as comparison aliases. */
async function expandLegacyBoomplayResources(resources, resolveUrl) {
const aliases = await Promise.all(resources.map(async resource => {
if (!isLegacyBoomplayAlbumUrl(resource)) return resource;
try {
return await resolveUrl(resource);
} catch {
return resource;
}
}));
return [...new Set([...resources, ...aliases])];
}
/** Return every resolved provider link that is not linked to the matched release. */
function findMissingLinks(links, matchedUrls) {
return links.filter(link => !matchedUrls.has(link.url));
}
function chooseHarmonyLink(links) {
for (const preferredService of HARMONY_SERVICE_PREFERENCE) {
const match = links.find(link => normalizeServiceName(link.service) === preferredService);
if (match) return match;
}
return undefined;
}
function relationshipTypeFor(link) {
const action = link.action.toLowerCase();
const service = normalizeServiceName(link.service);
if (amazonAsinFromUrl(link.url)) return URL_RELATIONSHIP_TYPES.asin;
if (action.includes('free') && action.includes('download')) return URL_RELATIONSHIP_TYPES.downloadForFree;
if (action.includes('buy') || action.includes('download') || ['amazonstore', 'beatport'].includes(service)) {
return URL_RELATIONSHIP_TYPES.purchaseForDownload;
}
if (FREE_STREAMING_SERVICES.has(service)) {
return URL_RELATIONSHIP_TYPES.streamForFree;
}
if (STREAMING_SERVICES.has(service)) {
return URL_RELATIONSHIP_TYPES.streaming;
}
if (action.includes('play') || action.includes('listen') || action.includes('stream')) {
return URL_RELATIONSHIP_TYPES.streamForFree;
}
return URL_RELATIONSHIP_TYPES.otherDatabases;
}
function readReleaseIds(relations) {
if (!Array.isArray(relations)) return [];
const ids = [];
for (const relation of relations) {
if (!relation || typeof relation !== 'object') continue;
const release = relation['release'];
if (!release || typeof release !== 'object') continue;
const id = release['id'];
if (typeof id === 'string') ids.push(id);
}
return ids;
}
/** Collect every release matched by any of the queried provider URLs. */
function findReleaseMatches(response) {
if (!response || typeof response !== 'object') return [];
const record = response;
const urlEntries = Array.isArray(record['urls']) ? record['urls'] : [record];
const matches = new Map();
for (const entry of urlEntries) {
if (!entry || typeof entry !== 'object') continue;
const urlRecord = entry;
const resource = urlRecord['resource'];
if (typeof resource !== 'string') continue;
for (const releaseId of readReleaseIds(urlRecord['relations'])) {
const resources = matches.get(releaseId) ?? new Set();
resources.add(resource);
matches.set(releaseId, resources);
}
}
return [...matches].map(([releaseId, resources]) => ({
releaseId,
matchedUrls: [...resources]
}));
}
const SERVER_PREFERENCE_KEY = 'smartlink-mb-importer:server';
const HYDRATION_SETTLE_MS = 1_000;
const MUSICBRAINZ_SERVERS = ['https://musicbrainz.org', 'https://beta.musicbrainz.org'];
function pageCacheKey(config) {
return `${config.id}-mb-importer:v1:${window.location.origin}${window.location.pathname.replace(/\/$/, '')}`;
}
function readPageCache(config) {
try {
const parsed = JSON.parse(window.localStorage.getItem(pageCacheKey(config)) ?? 'null');
if (parsed && typeof parsed === 'object') {
const record = parsed;
if (record['links'] && typeof record['links'] === 'object') {
return {
links: record['links']
};
}
}
} catch {
// Ignore unavailable storage and obsolete/corrupt cache entries.
}
return {
links: {}
};
}
function savePageCache(config, cache) {
try {
window.localStorage.setItem(pageCacheKey(config), JSON.stringify(cache));
} catch {
// The importer still works for this page load when storage is unavailable.
}
}
function readServerPreference() {
try {
const stored = window.localStorage.getItem(SERVER_PREFERENCE_KEY);
if (MUSICBRAINZ_SERVERS.includes(stored)) return stored;
} catch {
// Fall through to production.
}
return MUSICBRAINZ_SERVERS[0];
}
function saveServerPreference(server) {
try {
window.localStorage.setItem(SERVER_PREFERENCE_KEY, server);
} catch {
// Preference persistence is optional.
}
}
function gmRequest() {
const userscriptGlobal = globalThis;
return userscriptGlobal.GM?.xmlHttpRequest ?? userscriptGlobal.GM_xmlhttpRequest;
}
function followRedirect(sourceUrl) {
const request = gmRequest();
if (!request) return Promise.reject(new Error('No userscript cross-origin request API is available'));
return new Promise((resolve, reject) => {
const failed = () => {
reject(new Error(`Could not resolve ${sourceUrl}`));
};
request({
method: 'GET',
url: sourceUrl,
timeout: 20_000,
onload: response => {
const destination = response.finalUrl ?? response.responseURL;
if (response.status >= 200 && response.status < 400 && destination) resolve(destination);else failed();
},
onerror: failed,
ontimeout: failed
});
});
}
function waitForServiceElements(config) {
return new Promise(resolve => {
let settleTimer;
let finished = false;
const finish = elements => {
if (finished) return;
finished = true;
observer.disconnect();
if (settleTimer !== undefined) window.clearTimeout(settleTimer);
window.clearTimeout(maximumWaitTimer);
resolve(elements);
};
const waitUntilStable = () => {
const elements = config.collectServiceElements();
if (elements.length === 0) return;
if (settleTimer !== undefined) window.clearTimeout(settleTimer);
settleTimer = window.setTimeout(() => {
const stableAnchors = config.collectServiceElements();
if (stableAnchors.length > 0) finish(stableAnchors);else waitUntilStable();
}, HYDRATION_SETTLE_MS);
};
const observer = new MutationObserver(() => {
waitUntilStable();
});
const maximumWaitTimer = window.setTimeout(() => {
finish(config.collectServiceElements());
}, 20_000);
observer.observe(document.documentElement, {
childList: true,
subtree: true
});
waitUntilStable();
});
}
async function resolveServiceLinks(config, elements, cache) {
const resolved = await Promise.all(elements.map(async element => {
const cached = cache.links[element.cacheKey];
if (cached?.sourceUrl === element.sourceUrl) {
const refreshed = {
...cached,
label: element.label,
action: element.action
};
cache.links[element.cacheKey] = refreshed;
return refreshed;
}
try {
const destination = await config.resolveDestination(element);
const link = {
service: element.service,
label: element.label,
action: element.action,
sourceUrl: element.sourceUrl,
url: normalizeServiceUrl(destination, element.service)
};
cache.links[element.cacheKey] = link;
return link;
} catch (error) {
console.warn(`${config.siteName} importer: could not resolve ${element.label}`, error);
return undefined;
}
}));
savePageCache(config, cache);
return resolved.filter(link => link !== undefined);
}
function lookupReleases(links, server) {
const resources = [...new Set(links.map(link => link.url))];
if (resources.length === 0) return Promise.resolve([]);
const endpoint = new URL('/ws/2/url', server);
for (const resource of resources) endpoint.searchParams.append('resource', resource);
endpoint.searchParams.set('inc', 'release-rels');
endpoint.searchParams.set('fmt', 'json');
return fetch(endpoint, {
headers: {
Accept: 'application/json'
}
}).then(async response => {
if (!response.ok) throw new Error(`MusicBrainz URL lookup failed with HTTP ${response.status}`);
return findReleaseMatches(await response.json());
});
}
async function includeReleaseRelationships(links, server, match) {
const endpoint = new URL(`/ws/2/release/${match.releaseId}`, server);
endpoint.searchParams.set('inc', 'url-rels');
endpoint.searchParams.set('fmt', 'json');
const response = await fetch(endpoint, {
headers: {
Accept: 'application/json'
}
});
if (!response.ok) throw new Error(`MusicBrainz release lookup failed with HTTP ${response.status}`);
let resources = extractReleaseUrlResources(await response.json());
if (links.some(link => normalizeServiceName(link.service) === 'boomplay')) {
resources = await expandLegacyBoomplayResources(resources, followRedirect);
}
return {
releaseId: match.releaseId,
matchedUrls: findCanonicallyMatchedLinkUrls(links, resources)
};
}
function panelId(config) {
return `${config.id}-mb-importer`;
}
function styleId(config) {
return `${panelId(config)}-style`;
}
function addStyles(config) {
const importerPanelId = panelId(config);
if (document.getElementById(styleId(config))) return;
const style = document.createElement('style');
style.id = styleId(config);
style.textContent = `
#${importerPanelId} {
position: fixed;
top: 16px;
right: 16px;
z-index: 2147483646;
width: min(340px, calc(100vw - 32px));
max-height: calc(100vh - 32px);
overflow-y: auto;
box-sizing: border-box;
padding: 12px;
border-radius: 8px;
background: rgba(255, 255, 255, 0.96);
color: #222;
box-shadow: 0 2px 10px rgba(0, 0, 0, 0.22);
font: 13px/1.4 Arial, sans-serif;
}
@media (max-width: 720px) {
#${importerPanelId} {
top: auto;
right: 8px;
bottom: 8px;
width: min(340px, calc(100vw - 16px));
max-height: 50vh;
}
}
#${importerPanelId} .smartlink-mb-heading,
#${importerPanelId} .smartlink-mb-controls,
#${importerPanelId} .smartlink-mb-buttons {
display: flex;
align-items: center;
gap: 8px;
flex-wrap: wrap;
}
#${importerPanelId} .smartlink-mb-heading { font-weight: bold; margin-bottom: 8px; }
#${importerPanelId} [hidden] { display: none !important; }
#${importerPanelId} .smartlink-mb-controls { margin: 8px 0; }
#${importerPanelId} .smartlink-mb-status { color: #555; }
#${importerPanelId} .smartlink-mb-release { color: #0875bd; font-weight: bold; }
#${importerPanelId} .smartlink-mb-button {
display: inline-flex;
align-items: center;
gap: 6px;
min-height: 30px;
padding: 5px 10px;
box-sizing: border-box;
border: 1px solid #a7a7a7;
border-radius: 5px;
background: #f4f4f4;
color: #222;
cursor: pointer;
font: bold 12px Arial, sans-serif;
text-decoration: none;
}
#${importerPanelId} .smartlink-mb-button:hover:not(:disabled) { background: #fff; }
#${importerPanelId} .smartlink-mb-button:disabled { cursor: default; opacity: 0.55; }
#${importerPanelId} .smartlink-mb-button img { flex: none; }
.smartlink-mb-present { position: relative; outline: 3px solid #32a852 !important; }
.smartlink-mb-present::after {
content: '\u2713';
position: absolute;
top: -7px;
right: -7px;
width: 21px;
height: 21px;
border-radius: 25%;
background: #ba478f;
color: #fff;
font: bold 15px/21px Arial, sans-serif;
text-align: center;
z-index: 2;
}
`;
document.head.appendChild(style);
}
function createPanel(config, server) {
addStyles(config);
document.getElementById(panelId(config))?.remove();
const root = document.createElement('section');
root.id = panelId(config);
root.innerHTML = `
MusicBrainz release importer
Resolving provider links…
`;
mountPanel(config, root);
const serverSelect = root.querySelector('.smartlink-mb-server');
for (const value of MUSICBRAINZ_SERVERS) {
const option = document.createElement('option');
option.value = value;
option.textContent = value === MUSICBRAINZ_SERVERS[0] ? 'musicbrainz.org' : 'beta.musicbrainz.org';
option.selected = value === server;
serverSelect.appendChild(option);
}
return {
root,
status: root.querySelector('.smartlink-mb-status'),
release: root.querySelector('.smartlink-mb-release'),
server: serverSelect,
harmonyButton: root.querySelector('.smartlink-mb-harmony'),
missingLinksButton: root.querySelector('.smartlink-mb-missing'),
missingLinksLabel: root.querySelector('.smartlink-mb-missing-label')
};
}
function mountPanel(config, root) {
if (config.mountPanel) config.mountPanel(root);else document.body.appendChild(root);
}
function keepPanelMounted(config, panel, onRemount) {
let remountScheduled = false;
const ensureMounted = () => {
if (panel.root.isConnected || remountScheduled) return;
remountScheduled = true;
window.setTimeout(() => {
remountScheduled = false;
if (panel.root.isConnected) return;
mountPanel(config, panel.root);
onRemount();
}, 250);
};
const observer = new MutationObserver(ensureMounted);
observer.observe(document.documentElement, {
childList: true,
subtree: true
});
ensureMounted();
}
function markExistingLinks(elements, links, matchedUrls) {
for (const element of elements) {
const serviceMatches = links.filter(candidate => candidate.service === element.service);
const link = serviceMatches.find(candidate => candidate.sourceUrl === element.sourceUrl) ?? serviceMatches[0];
const present = link ? matchedUrls.has(link.url) : false;
element.element.classList.toggle('smartlink-mb-present', present);
if (present) element.element.title = 'This URL is already linked to the MusicBrainz release';
}
}
function submitMissingLinks(config, server, releaseId, links) {
const form = document.createElement('form');
form.method = 'post';
form.action = `${server}/release/${releaseId}/edit`;
form.target = '_blank';
form.acceptCharset = 'UTF-8';
form.hidden = true;
const userscriptInfo = globalThis.GM_info?.script;
const scriptName = userscriptInfo?.name ?? `${config.siteName} MusicBrainz importer`;
const scriptVersion = userscriptInfo?.version ? ` ${userscriptInfo.version}` : '';
const parameters = [['edit_note', `Added URL relationships from ${window.location.href.replace(/[?#].*$/, '')}\n\nUsing '''${scriptName}'''${scriptVersion} from https://github.com/murdos/musicbrainz-userscripts`], ['redirect_uri', `${server}/release/${releaseId}`]];
links.forEach((link, index) => {
parameters.push([`urls.${index}.link_type`, String(relationshipTypeFor(link))]);
parameters.push([`urls.${index}.url`, link.url]);
});
for (const [name, value] of parameters) {
const input = document.createElement('input');
input.type = 'hidden';
input.name = name;
input.value = value;
form.appendChild(input);
}
document.body.appendChild(form);
form.submit();
form.remove();
}
function configureHarmonyButton(panel, links) {
const harmonyLink = chooseHarmonyLink(links);
if (!harmonyLink) return;
const harmonyUrl = new URL('https://harmony.pulsewidth.org.uk/release');
harmonyUrl.searchParams.set('category', 'preferred');
harmonyUrl.searchParams.set('url', harmonyLink.url);
panel.harmonyButton.href = harmonyUrl.toString();
panel.harmonyButton.title = `Import using ${harmonyLink.label}`;
panel.harmonyButton.hidden = false;
}
async function runSmartLinkImporter(config) {
const mbPanelId = panelId(config);
if (document.getElementById(mbPanelId)) return;
const server = readServerPreference();
const cache = readPageCache(config);
const elements = await waitForServiceElements(config);
if (document.getElementById(mbPanelId)) return;
const panel = createPanel(config, server);
if (elements.length === 0) {
panel.status.textContent = `No ${config.siteName} provider links were found on this page.`;
return;
}
const links = await resolveServiceLinks(config, elements, cache);
panel.status.textContent = `Resolved ${links.length} of ${elements.length} provider links. Checking MusicBrainz…`;
configureHarmonyButton(panel, links);
let lookupGeneration = 0;
const checkMusicBrainz = async selectedServer => {
const generation = ++lookupGeneration;
panel.status.textContent = `Resolved ${links.length} provider links. Checking MusicBrainz…`;
panel.release.hidden = true;
panel.missingLinksButton.hidden = true;
configureHarmonyButton(panel, links);
markExistingLinks(config.collectServiceElements(), links, new Set());
try {
const discoveredMatches = await lookupReleases(links, selectedServer);
if (generation !== lookupGeneration) return;
const discoveredMatch = discoveredMatches[0];
if (!discoveredMatch) {
panel.status.textContent = 'No existing MusicBrainz release found. Import with Harmony, then reload this page.';
return;
}
if (discoveredMatches.length > 1) {
panel.harmonyButton.hidden = true;
panel.status.textContent = `Ambiguous MusicBrainz match: these provider links belong to ${discoveredMatches.length} releases. No links can be added.`;
return;
}
const match = await includeReleaseRelationships(links, selectedServer, discoveredMatch);
if (generation !== lookupGeneration) return;
const matchedUrls = new Set(match.matchedUrls);
markExistingLinks(config.collectServiceElements(), links, matchedUrls);
panel.release.href = `${selectedServer}/release/${match.releaseId}`;
panel.release.textContent = 'View matched release';
panel.release.hidden = false;
const missing = findMissingLinks(links, matchedUrls);
panel.status.textContent = `${matchedUrls.size} provider link${matchedUrls.size === 1 ? '' : 's'} already present; ${missing.length} additional link${missing.length === 1 ? '' : 's'} available.`;
panel.missingLinksButton.hidden = false;
panel.missingLinksButton.disabled = missing.length === 0;
panel.missingLinksLabel.textContent = missing.length === 0 ? 'All Links Present' : 'Add Missing Links';
panel.missingLinksButton.onclick = () => {
submitMissingLinks(config, selectedServer, match.releaseId, missing);
};
} catch (error) {
if (generation !== lookupGeneration) return;
console.error(`${config.siteName} importer: MusicBrainz lookup failed`, error);
panel.status.textContent = 'MusicBrainz lookup failed. Reload the page to try again.';
}
};
panel.server.addEventListener('change', () => {
const selectedServer = panel.server.value;
saveServerPreference(selectedServer);
void checkMusicBrainz(selectedServer);
});
keepPanelMounted(config, panel, () => {
void checkMusicBrainz(panel.server.value);
});
await checkMusicBrainz(server);
}
function record(value) {
return value && typeof value === 'object' && !Array.isArray(value) ? value : undefined;
}
/** Read release-provider destinations from bfan.link's Next.js hydration payload. */
function extractBfanServiceData(payload) {
const root = record(payload);
const props = record(root?.['props']);
const pageProps = record(props?.['pageProps']);
const backlink = record(pageProps?.['backlinkStaticData']);
const stores = record(backlink?.['stores']);
if (!backlink || !stores) return [];
const mode = backlink['mode'] === 'prerelease' ? 'prereleaseLandingCTAs' : 'postreleaseLandingCTAs';
const ctas = record(backlink[mode]);
const options = record(ctas?.['options']);
const displayOrder = Array.isArray(ctas?.['displayOrder']) ? ctas['displayOrder'].filter(value => typeof value === 'string') : Object.keys(stores);
const links = [];
for (const storeName of displayOrder) {
const store = record(stores[storeName]);
const urls = record(store?.['urls']);
const option = record(options?.[storeName]);
const sourceUrl = urls?.['default'];
if (typeof sourceUrl !== 'string' || !sourceUrl || option?.['isDisplayed'] === false) continue;
const service = normalizeServiceName(storeName);
if (!service) continue;
links.push({
service,
label: typeof store?.['displayName'] === 'string' ? store['displayName'] : storeName,
action: typeof option?.['label'] === 'string' ? option['label'] : '',
sourceUrl
});
}
return links;
}
function readServiceData() {
const nextData = document.querySelector('script#__NEXT_DATA__')?.textContent;
if (!nextData) return [];
try {
return extractBfanServiceData(JSON.parse(nextData));
} catch {
return [];
}
}
function collectServiceElements() {
const dataByService = new Map(readServiceData().map(data => [data.service, data]));
const elements = [];
for (const element of document.querySelectorAll('[data-testid="call-to-actions"] > [data-testid]')) {
const rawService = element.dataset['testid'] ?? '';
const service = normalizeServiceName(rawService);
const data = dataByService.get(service);
if (!data) continue;
elements.push({
cacheKey: service,
element,
service,
label: element.querySelector('img[alt]')?.alt || data.label,
action: element.querySelector('button')?.textContent.trim() || data.action,
sourceUrl: data.sourceUrl
});
}
return elements;
}
void runSmartLinkImporter({
id: 'bfan',
siteName: 'bfan.link',
collectServiceElements,
resolveDestination: element => element.sourceUrl
});
})();
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