From 5b6639a3cf9b6c63045cb82e6ef1a43b0742c367 Mon Sep 17 00:00:00 2001
From: Armand Philippot <git@armandphilippot.com>
Date: Wed, 9 Mar 2022 00:38:02 +0100
Subject: feat: provide pagination for users with js disabled (#13)

* chore: add a Pagination component

* chore: add blog pages

* chore: fallback to page number based navigation if JS disabled

* chore: update translation
---
 src/pages/blog/index.tsx     |  59 ++++++-------
 src/pages/blog/page/[id].tsx | 195 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 226 insertions(+), 28 deletions(-)
 create mode 100644 src/pages/blog/page/[id].tsx

(limited to 'src/pages')

diff --git a/src/pages/blog/index.tsx b/src/pages/blog/index.tsx
index 543fad9..366fc28 100644
--- a/src/pages/blog/index.tsx
+++ b/src/pages/blog/index.tsx
@@ -1,5 +1,6 @@
 import { Button } from '@components/Buttons';
 import { getLayout } from '@components/Layouts/Layout';
+import Pagination from '@components/Pagination/Pagination';
 import PaginationCursor from '@components/PaginationCursor/PaginationCursor';
 import PostHeader from '@components/PostHeader/PostHeader';
 import PostsList from '@components/PostsList/PostsList';
@@ -29,12 +30,17 @@ import useSWRInfinite from 'swr/infinite';
 const Blog: NextPageWithLayout<BlogPageProps> = ({
   allThematics,
   allTopics,
-  firstPosts,
+  posts,
   totalPosts,
 }) => {
   const intl = useIntl();
   const lastPostRef = useRef<HTMLSpanElement>(null);
   const router = useRouter();
+  const [isMounted, setIsMounted] = useState<boolean>(false);
+
+  useEffect(() => {
+    if (typeof window !== undefined) setIsMounted(true);
+  }, []);
 
   const getKey = (pageIndex: number, previousData: PostsListData) => {
     if (previousData && !previousData.posts) return null;
@@ -50,7 +56,7 @@ const Blog: NextPageWithLayout<BlogPageProps> = ({
   const { data, error, size, setSize } = useSWRInfinite(
     getKey,
     getPublishedPosts,
-    { fallbackData: [firstPosts] }
+    { fallbackData: [posts] }
   );
   const [totalPostsCount, setTotalPostsCount] = useState<number>(totalPosts);
 
@@ -171,31 +177,28 @@ const Blog: NextPageWithLayout<BlogPageProps> = ({
         <PostHeader title={title} meta={{ results: totalPostsCount }} />
         <div className={styles.body}>
           {getPostsList()}
-          {hasNextPage && (
-            <>
-              <PaginationCursor
-                current={loadedPostsCount}
-                total={totalPostsCount}
-              />
-              <Button
-                isDisabled={isLoadingMore}
-                clickHandler={loadMorePosts}
-                position="center"
-                spacing={true}
-              >
-                {intl.formatMessage({
-                  defaultMessage: 'Load more?',
-                  description: 'BlogPage: load more text',
-                })}
-              </Button>
-              <noscript>
-                {intl.formatMessage({
-                  defaultMessage: 'Javascript is required to load more posts.',
-                  description: 'BlogPage: noscript tag',
-                })}
-              </noscript>
-            </>
-          )}
+          {hasNextPage &&
+            (isMounted ? (
+              <>
+                <PaginationCursor
+                  current={loadedPostsCount}
+                  total={totalPostsCount}
+                />
+                <Button
+                  isDisabled={isLoadingMore}
+                  clickHandler={loadMorePosts}
+                  position="center"
+                  spacing={true}
+                >
+                  {intl.formatMessage({
+                    defaultMessage: 'Load more?',
+                    description: 'BlogPage: load more text',
+                  })}
+                </Button>
+              </>
+            ) : (
+              <Pagination baseUrl="/blog" total={totalPostsCount} />
+            ))}
         </div>
         <Sidebar
           position="right"
@@ -246,8 +249,8 @@ export const getStaticProps: GetStaticProps = async (
       allThematics,
       allTopics,
       breadcrumbTitle,
-      firstPosts,
       locale,
+      posts: firstPosts,
       totalPosts,
       translation,
     },
diff --git a/src/pages/blog/page/[id].tsx b/src/pages/blog/page/[id].tsx
new file mode 100644
index 0000000..3be058b
--- /dev/null
+++ b/src/pages/blog/page/[id].tsx
@@ -0,0 +1,195 @@
+import { getLayout } from '@components/Layouts/Layout';
+import Pagination from '@components/Pagination/Pagination';
+import PostHeader from '@components/PostHeader/PostHeader';
+import PostsList from '@components/PostsList/PostsList';
+import Sidebar from '@components/Sidebar/Sidebar';
+import { ThematicsList, TopicsList } from '@components/Widgets';
+import {
+  getAllThematics,
+  getAllTopics,
+  getEndCursor,
+  getPostsTotal,
+  getPublishedPosts,
+} from '@services/graphql/queries';
+import { NextPageWithLayout } from '@ts/types/app';
+import { BlogPageProps } from '@ts/types/blog';
+import { settings } from '@utils/config';
+import { getIntlInstance, loadTranslation } from '@utils/helpers/i18n';
+import { GetStaticPaths, GetStaticProps, GetStaticPropsContext } from 'next';
+import Head from 'next/head';
+import { useRouter } from 'next/router';
+import Script from 'next/script';
+import { useIntl } from 'react-intl';
+import { Blog, Graph, WebPage } from 'schema-dts';
+import styles from '@styles/pages/Page.module.scss';
+import { getFormattedPageNumbers } from '@utils/helpers/format';
+import { useEffect } from 'react';
+
+const BlogPage: NextPageWithLayout<BlogPageProps> = ({
+  allThematics,
+  allTopics,
+  posts,
+  totalPosts,
+}) => {
+  const intl = useIntl();
+  const router = useRouter();
+  const pageNumber = Number(router.query.id);
+
+  useEffect(() => {
+    if (router.query.id === '1') router.push('/blog');
+  }, [router]);
+
+  const pageTitle = intl.formatMessage(
+    {
+      defaultMessage: `Blog - Page {number} - {websiteName}`,
+      description: 'BlogPage: SEO - Page title',
+    },
+    { number: pageNumber, websiteName: settings.name }
+  );
+  const pageDescription = intl.formatMessage(
+    {
+      defaultMessage:
+        "Discover {websiteName}'s writings. He talks about web development, Linux and open source mostly.",
+      description: 'BlogPage: SEO - Meta description',
+    },
+    { websiteName: settings.name }
+  );
+  const pageUrl = `${settings.url}${router.asPath}`;
+
+  const webpageSchema: WebPage = {
+    '@id': `${pageUrl}`,
+    '@type': 'WebPage',
+    breadcrumb: { '@id': `${settings.url}/#breadcrumb` },
+    name: pageTitle,
+    description: pageDescription,
+    inLanguage: settings.locales.defaultLocale,
+    reviewedBy: { '@id': `${settings.url}/#branding` },
+    url: `${settings.url}`,
+    isPartOf: {
+      '@id': `${settings.url}`,
+    },
+  };
+
+  const blogSchema: Blog = {
+    '@id': `${settings.url}/#blog`,
+    '@type': 'Blog',
+    author: { '@id': `${settings.url}/#branding` },
+    creator: { '@id': `${settings.url}/#branding` },
+    editor: { '@id': `${settings.url}/#branding` },
+    inLanguage: settings.locales.defaultLocale,
+    license: 'https://creativecommons.org/licenses/by-sa/4.0/deed.fr',
+    mainEntityOfPage: { '@id': `${pageUrl}` },
+  };
+
+  const schemaJsonLd: Graph = {
+    '@context': 'https://schema.org',
+    '@graph': [webpageSchema, blogSchema],
+  };
+
+  const title = intl.formatMessage({
+    defaultMessage: 'Blog',
+    description: 'BlogPage: page title',
+  });
+
+  return (
+    <>
+      <Head>
+        <title>{pageTitle}</title>
+        <meta name="description" content={pageDescription} />
+        <meta property="og:url" content={`${pageUrl}`} />
+        <meta property="og:type" content="website" />
+        <meta property="og:title" content={title} />
+        <meta property="og:description" content={pageDescription} />
+      </Head>
+      <Script
+        id="schema-blog"
+        type="application/ld+json"
+        dangerouslySetInnerHTML={{ __html: JSON.stringify(schemaJsonLd) }}
+      />
+      <article
+        id="blog"
+        className={`${styles.article} ${styles['article--no-comments']}`}
+      >
+        <PostHeader title={title} meta={{ results: totalPosts }} />
+        <div className={styles.body}>
+          <PostsList data={[posts]} showYears={true} />
+          <Pagination baseUrl="/blog" total={totalPosts} />
+        </div>
+        <Sidebar
+          position="right"
+          title={intl.formatMessage({
+            defaultMessage: 'Filter by:',
+            description: 'BlogPage: sidebar title',
+          })}
+        >
+          <ThematicsList
+            initialData={allThematics}
+            title={intl.formatMessage({
+              defaultMessage: 'Thematics',
+              description: 'BlogPage: thematics list widget title',
+            })}
+          />
+          <TopicsList
+            initialData={allTopics}
+            title={intl.formatMessage({
+              defaultMessage: 'Topics',
+              description: 'BlogPage: topics list widget title',
+            })}
+          />
+        </Sidebar>
+      </article>
+    </>
+  );
+};
+
+BlogPage.getLayout = getLayout;
+
+export const getStaticProps: GetStaticProps = async (
+  context: GetStaticPropsContext
+) => {
+  const intl = await getIntlInstance();
+  const breadcrumbTitle = intl.formatMessage({
+    defaultMessage: 'Blog',
+    description: 'BlogPage: breadcrumb item',
+  });
+  const { locale, params } = context;
+  const queriedPageNumber = params ? Number(params.id) : 1;
+  const queriedPostsNumber = settings.postsPerPage * queriedPageNumber;
+  const endCursor =
+    queriedPostsNumber === 1
+      ? undefined
+      : await getEndCursor({ first: queriedPostsNumber });
+  const posts = await getPublishedPosts({
+    first: settings.postsPerPage,
+    after: endCursor,
+  });
+  const totalPosts = await getPostsTotal();
+  const allThematics = await getAllThematics();
+  const allTopics = await getAllTopics();
+  const translation = await loadTranslation(locale);
+
+  return {
+    props: {
+      allThematics,
+      allTopics,
+      breadcrumbTitle,
+      locale,
+      posts,
+      totalPosts,
+      translation,
+    },
+  };
+};
+
+export default BlogPage;
+
+export const getStaticPaths: GetStaticPaths = async () => {
+  const totalPosts = await getPostsTotal();
+  const totalPages = Math.floor(totalPosts / settings.postsPerPage);
+  const paths = getFormattedPageNumbers(totalPages);
+
+  return {
+    paths,
+    fallback: true,
+  };
+};
-- 
cgit v1.2.3