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// Non-sebuf: returns XML/HTML, stays as standalone Vercel function
export const config = { runtime: 'edge' };
const RELEASES_URL = 'https://api.github.com/repos/koala73/worldmonitor/releases/latest';
const RELEASES_PAGE = 'https://github.com/koala73/worldmonitor/releases/latest';
const PLATFORM_PATTERNS = {
'windows-exe': (name) => name.endsWith('_x64-setup.exe'),
'windows-msi': (name) => name.endsWith('_x64_en-US.msi'),
'macos-arm64': (name) => name.endsWith('_aarch64.dmg'),
'macos-x64': (name) => name.endsWith('_x64.dmg') && !name.includes('setup'),
'linux-appimage': (name) => name.endsWith('_amd64.AppImage'),
'linux-appimage-arm64': (name) => name.endsWith('_aarch64.AppImage'),
};
const VARIANT_IDENTIFIERS = {
full: ['worldmonitor'],
world: ['worldmonitor'],
tech: ['techmonitor'],
finance: ['financemonitor'],
};
function canonicalAssetName(name) {
return String(name || '').toLowerCase().replace(/[^a-z0-9]+/g, '');
}
function findAssetForVariant(assets, variant, platformMatcher) {
const identifiers = VARIANT_IDENTIFIERS[variant] ?? null;
if (!identifiers) return null;
return assets.find((asset) => {
const assetName = String(asset?.name || '');
const normalizedAssetName = canonicalAssetName(assetName);
const hasVariantIdentifier = identifiers.some((identifier) =>
normalizedAssetName.includes(identifier)
);
return hasVariantIdentifier && platformMatcher(assetName);
}) ?? null;
}
export default async function handler(req) {
const url = new URL(req.url);
const platform = url.searchParams.get('platform');
const variant = (url.searchParams.get('variant') || '').toLowerCase();
if (!platform || !PLATFORM_PATTERNS[platform]) {
return Response.redirect(RELEASES_PAGE, 302);
}
try {
const res = await fetch(RELEASES_URL, {
headers: {
'Accept': 'application/vnd.github+json',
'User-Agent': 'WorldMonitor-Download-Redirect',
},
});
if (!res.ok) {
return Response.redirect(RELEASES_PAGE, 302);
}
const release = await res.json();
const matcher = PLATFORM_PATTERNS[platform];
const assets = Array.isArray(release.assets) ? release.assets : [];
const asset = variant
? findAssetForVariant(assets, variant, matcher)
: assets.find((a) => matcher(String(a?.name || '')));
if (!asset) {
return Response.redirect(RELEASES_PAGE, 302);
}
return new Response(null, {
status: 302,
headers: {
'Location': asset.browser_download_url,
'Cache-Control': 'public, s-maxage=300, stale-while-revalidate=60',
},
});
} catch {
return Response.redirect(RELEASES_PAGE, 302);
}
}