feat: new importer (#214)

packages/common/server/parse-referrer.ts

@@ -0,0 +1,66 @@
+import { stripTrailingSlash } from '../src/string';
+
+import referrers from './referrers';
+
+function getHostname(url: string | undefined) {
+  if (!url) {
+    return '';
+  }
+
+  try {
+    return new URL(url).hostname;
+  } catch (e) {
+    return '';
+  }
+}
+
+export function parseReferrer(url: string | undefined) {
+  const hostname = getHostname(url);
+  const match = referrers[hostname] ?? referrers[hostname.replace('www.', '')];
+
+  return {
+    name: match?.name ?? '',
+    type: match?.type ?? '',
+    url: stripTrailingSlash(url ?? ''),
+  };
+}
+
+export function getReferrerWithQuery(
+  query: Record<string, string> | undefined,
+) {
+  if (!query) {
+    return null;
+  }
+
+  const source = (
+    query.utm_source ??
+    query.ref ??
+    query.utm_referrer ??
+    ''
+  ).toLowerCase();
+
+  if (source === '') {
+    return null;
+  }
+
+  const match =
+    referrers[source] ||
+    referrers[`${source}.com`] ||
+    Object.values(referrers).find(
+      (referrer) => referrer.name.toLowerCase() === source,
+    );
+
+  if (match) {
+    return {
+      name: match.name,
+      type: match.type,
+      url: '',
+    };
+  }
+
+  return {
+    name: source,
+    type: '',
+    url: '',
+  };
+}