refactor(pages): refine Topic pages

* add useTopic and useTopicsList hooks to refresh data
* add a table of contents
* add Cypress tests

1 files changed, 28 insertions, 0 deletions

diff --git a/src/utils/hooks/use-topic/use-topic.ts b/src/utils/hooks/use-topic/use-topic.ts
new file mode 100644
index 0000000..bd7ee49
--- /dev/null
+++ b/src/utils/hooks/use-topic/use-topic.ts
@@ -0,0 +1,28 @@
+import useSWR from 'swr';
+import { convertWPTopicToTopic, fetchTopic } from '../../../services/graphql';
+import type { Maybe, Topic, WPTopic } from '../../../types';
+
+export type UseTopicReturn<T extends Maybe<WPTopic>> = {
+  isError: boolean;
+  isLoading: boolean;
+  isValidating: boolean;
+  topic: T extends undefined ? Maybe<Topic> : Topic;
+};
+
+export const useTopic = <T extends Maybe<WPTopic>>(
+  slug: string,
+  fallback?: T
+): UseTopicReturn<T> => {
+  const { data, error, isLoading, isValidating } = useSWR(slug, fetchTopic, {
+    fallbackData: fallback,
+  });
+
+  if (error) console.error(error);
+
+  return {
+    isError: !!error,
+    isLoading,
+    isValidating,
+    topic: data ? convertWPTopicToTopic(data) : undefined,
+  } as UseTopicReturn<T>;
+};