refactor(pages): refine Article pages

* use rehype to update code blocks class names
* fix widget heading level (after a level 1 it should always be a level
2 and not 3)
* replace Spinner with LoadingPage and LoadingPageComments components to
keep layout coherent
* refactor useArticle and useComments hooks
* fix URLs in JSON LD schema
* add Cypress tests

1 files changed, 28 insertions, 0 deletions

diff --git a/src/utils/hooks/use-article/use-article.ts b/src/utils/hooks/use-article/use-article.ts
new file mode 100644
index 0000000..fbbc6bd
--- /dev/null
+++ b/src/utils/hooks/use-article/use-article.ts
@@ -0,0 +1,28 @@
+import useSWR from 'swr';
+import { convertPostToArticle, fetchPost } from '../../../services/graphql';
+import type { Article, Maybe, WPPost } from '../../../types';
+
+export type UseArticleReturn<T extends Maybe<WPPost>> = {
+  article: T extends undefined ? Maybe<Article> : Article;
+  isError: boolean;
+  isLoading: boolean;
+  isValidating: boolean;
+};
+
+export const useArticle = <T extends Maybe<WPPost>>(
+  slug: string,
+  fallback?: T
+): UseArticleReturn<T> => {
+  const { data, error, isLoading, isValidating } = useSWR(slug, fetchPost, {
+    fallbackData: fallback,
+  });
+
+  if (error) console.error(error);
+
+  return {
+    article: data ? convertPostToArticle(data) : undefined,
+    isError: !!error,
+    isLoading,
+    isValidating,
+  } as UseArticleReturn<T>;
+};