first commit

calcom/packages/lib/hooks/useRouterQuery.ts

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+import { useCompatSearchParams } from "@calcom/lib/hooks/useCompatSearchParams";
+
+/**
+ * An alternative to Object.fromEntries that allows duplicate keys.
+ */
+function fromEntriesWithDuplicateKeys(entries: IterableIterator<[string, string]> | null) {
+  const result: Record<string, string | string[]> = {};
+
+  if (entries === null) {
+    return result;
+  }
+
+  // Consider setting atleast ES2015 as target
+  // eslint-disable-next-line @typescript-eslint/ban-ts-comment
+  // @ts-ignore
+  for (const [key, value] of entries) {
+    if (result.hasOwnProperty(key)) {
+      let currentValue = result[key];
+      if (!Array.isArray(currentValue)) {
+        currentValue = [currentValue];
+      }
+      currentValue.push(value);
+      result[key] = currentValue;
+    } else {
+      result[key] = value;
+    }
+  }
+  return result;
+}
+
+/**
+ * This hook returns the query object from the router. It is an attempt to
+ * keep the original query object from the old useRouter hook.
+ * At least until everything is properly migrated to the new router.
+ * @returns {Object} routerQuery
+ */
+export const useRouterQuery = () => {
+  const searchParams = useCompatSearchParams();
+  const routerQuery = fromEntriesWithDuplicateKeys(searchParams?.entries() ?? null);
+  return routerQuery;
+};