From fe3922d039bdb5d4c063bc73543abc53a57d8464 Mon Sep 17 00:00:00 2001
From: Armand Philippot <git@armandphilippot.com>
Date: Fri, 22 Jul 2022 18:32:53 +0200
Subject: fix(comments): refresh comments on changes or new comment

---
 src/pages/article/[slug].tsx     |  5 ++---
 src/utils/hooks/use-comments.tsx | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+), 3 deletions(-)
 create mode 100644 src/utils/hooks/use-comments.tsx

diff --git a/src/pages/article/[slug].tsx b/src/pages/article/[slug].tsx
index ea679ab..f720fa6 100644
--- a/src/pages/article/[slug].tsx
+++ b/src/pages/article/[slug].tsx
@@ -26,6 +26,7 @@ import {
   getWebPageSchema,
 } from '@utils/helpers/schema-org';
 import useBreadcrumb from '@utils/hooks/use-breadcrumb';
+import useComments from '@utils/hooks/use-comments';
 import usePrism, { type OptionalPrismPlugin } from '@utils/hooks/use-prism';
 import useReadingTime from '@utils/hooks/use-reading-time';
 import useSettings from '@utils/hooks/use-settings';
@@ -58,9 +59,7 @@ const ArticlePage: NextPageWithLayout<ArticlePageProps> = ({
   const { data: article } = useSWR(() => slug, getArticleBySlug, {
     fallbackData: post,
   });
-  const { data: commentsData } = useSWR(() => id, getPostComments, {
-    fallbackData: comments,
-  });
+  const commentsData = useComments(post.id, comments);
   const { items: breadcrumbItems, schema: breadcrumbSchema } = useBreadcrumb({
     title: article?.title || '',
     url: `/article/${slug}`,
diff --git a/src/utils/hooks/use-comments.tsx b/src/utils/hooks/use-comments.tsx
new file mode 100644
index 0000000..cc9e560
--- /dev/null
+++ b/src/utils/hooks/use-comments.tsx
@@ -0,0 +1,33 @@
+import { fetchAPI, getAPIUrl } from '@services/graphql/api';
+import {
+  buildCommentsTree,
+  getCommentFromRawData,
+} from '@services/graphql/comments';
+import { commentsQuery } from '@services/graphql/comments.query';
+import { Comment } from '@ts/types/app';
+import { RawComment } from '@ts/types/raw-data';
+import useSWR from 'swr';
+
+/**
+ * Retrieve the comments of a page/article.
+ * @param contentId - A page/article id.
+ * @returns {Comment[]|undefined}
+ */
+const useComments = (
+  contentId: string | number,
+  fallback?: Comment[]
+): Comment[] | undefined => {
+  const { data } = useSWR(
+    { api: getAPIUrl(), query: commentsQuery, variables: { contentId } },
+    fetchAPI<RawComment, typeof commentsQuery>,
+    { fallback }
+  );
+
+  const comments = data?.comments.nodes.map((comment) =>
+    getCommentFromRawData(comment)
+  );
+
+  return comments ? buildCommentsTree(comments) : undefined;
+};
+
+export default useComments;
-- 
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