// functions/unreleased/[sheetId].js
const ARTISTS_NDJSON_URL = 'https://assets.artistgrid.cx/artists.ndjson';
const ASSETS_BASE_URL = 'https://assets.artistgrid.cx';
function getSheetId(url) {
if (!url) return null;
const match = url.match(/spreadsheets\/d\/([a-zA-Z0-9-_]+)/);
return match ? match[1] : null;
}
function normalizeArtistName(name) {
return name.toLowerCase().replace(/[^a-z0-9]/g, '');
}
async function loadArtistsData() {
try {
const response = await fetch(ARTISTS_NDJSON_URL);
if (!response.ok) throw new Error('Network response was not ok');
const text = await response.text();
return text
.trim()
.split('\n')
.filter((line) => line.trim())
.map((line) => {
try {
return JSON.parse(line);
} catch {
return null;
}
})
.filter((item) => item !== null);
} catch (e) {
console.error('Failed to load Artists List:', e);
return [];
}
}
export async function onRequest(context) {
const { request, params, env } = context;
const userAgent = request.headers.get('User-Agent') || '';
const isBot =
/discordbot|twitterbot|facebookexternalhit|bingbot|googlebot|slurp|whatsapp|pinterest|slackbot|telegrambot|linkedinbot|mastodon|signal|snapchat|redditbot|skypeuripreview|viberbot|linebot|embedly|quora|outbrain|tumblr|duckduckbot|yandexbot|rogerbot|showyoubot|kakaotalk|naverbot|seznambot|mediapartners|adsbot|petalbot|applebot|ia_archiver/i.test(
userAgent
);
const sheetId = params.sheetId;
if (isBot && sheetId) {
try {
const artists = await loadArtistsData();
const artist = artists.find((a) => getSheetId(a.url) === sheetId);
if (artist && artist.name) {
const normalizedName = normalizeArtistName(artist.name);
const imageUrl = `${ASSETS_BASE_URL}/${normalizedName}.webp`;
const pageUrl = new URL(request.url).href;
const title = `${artist.name} | Unreleased`;
const description = `Stream unreleased music by ${artist.name} on Monochrome`;
const metaHtml = `
${title}
${artist.name}
${description}
`;
return new Response(metaHtml, {
headers: { 'content-type': 'text/html;charset=UTF-8' },
});
}
} catch (error) {
console.error(`Error generating meta tags for unreleased artist ${sheetId}:`, error);
}
}
const url = new URL(request.url);
url.pathname = '/';
return env.ASSETS.fetch(new Request(url, request));
}