From f4c7ab4e306d2f04324853e67032d370abd65d0c Mon Sep 17 00:00:00 2001
From: Armand Philippot <git@armandphilippot.com>
Date: Fri, 20 May 2022 15:37:08 +0200
Subject: chore: handle blog pagination when JS is disabled

---
 src/pages/blog/page/[number].tsx | 311 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 311 insertions(+)
 create mode 100644 src/pages/blog/page/[number].tsx

(limited to 'src/pages/blog/page/[number].tsx')

diff --git a/src/pages/blog/page/[number].tsx b/src/pages/blog/page/[number].tsx
new file mode 100644
index 0000000..e8c93f7
--- /dev/null
+++ b/src/pages/blog/page/[number].tsx
@@ -0,0 +1,311 @@
+import PostsList, { type Post } from '@components/organisms/layout/posts-list';
+import LinksListWidget from '@components/organisms/widgets/links-list-widget';
+import { getLayout } from '@components/templates/layout/layout';
+import PageLayout from '@components/templates/page/page-layout';
+import { type EdgesResponse } from '@services/graphql/api';
+import {
+  getArticleFromRawData,
+  getArticles,
+  getArticlesEndCursor,
+  getTotalArticles,
+} from '@services/graphql/articles';
+import {
+  getThematicsPreview,
+  getTotalThematics,
+} from '@services/graphql/thematics';
+import { getTopicsPreview, getTotalTopics } from '@services/graphql/topics';
+import {
+  type Article,
+  type Meta,
+  type NextPageWithLayout,
+} from '@ts/types/app';
+import {
+  type RawArticle,
+  type RawThematicPreview,
+  type RawTopicPreview,
+} from '@ts/types/raw-data';
+import { settings } from '@utils/config';
+import { loadTranslation, type Messages } from '@utils/helpers/i18n';
+import {
+  getLinksListItems,
+  getPageLinkFromRawData,
+} from '@utils/helpers/pages';
+import useBreadcrumb from '@utils/hooks/use-breadcrumb';
+import useRedirection from '@utils/hooks/use-redirection';
+import useSettings from '@utils/hooks/use-settings';
+import { GetStaticPaths, GetStaticProps } from 'next';
+import Head from 'next/head';
+import { useRouter } from 'next/router';
+import Script from 'next/script';
+import { ParsedUrlQuery } from 'querystring';
+import { useIntl } from 'react-intl';
+import { Blog, Graph, WebPage } from 'schema-dts';
+
+type BlogPageProps = {
+  articles: EdgesResponse<RawArticle>;
+  pageNumber: number;
+  thematicsList: RawThematicPreview[];
+  topicsList: RawTopicPreview[];
+  totalArticles: number;
+  translation: Messages;
+};
+
+/**
+ * Blog index page.
+ */
+const BlogPage: NextPageWithLayout<BlogPageProps> = ({
+  articles,
+  pageNumber,
+  thematicsList,
+  topicsList,
+  totalArticles,
+}) => {
+  useRedirection({
+    query: { param: 'number', value: '1' },
+    redirectTo: '/blog',
+  });
+
+  const intl = useIntl();
+  const title = intl.formatMessage({
+    defaultMessage: 'Blog',
+    description: 'BlogPage: page title',
+    id: '7TbbIk',
+  });
+  const pageNumberTitle = intl.formatMessage(
+    {
+      defaultMessage: 'Page {number}',
+      id: 'zbzlb1',
+      description: 'BlogPage: page number',
+    },
+    {
+      number: pageNumber,
+    }
+  );
+  const pageTitleWithPageNumber = `${title} - ${pageNumberTitle}`;
+  const { items: breadcrumbItems, schema: breadcrumbSchema } = useBreadcrumb({
+    title: pageNumberTitle,
+    url: `/blog/page/${pageNumber}`,
+  });
+
+  const { website } = useSettings();
+  const { asPath } = useRouter();
+  const pageTitle = `${pageTitleWithPageNumber} - ${website.name}`;
+  const pageDescription = intl.formatMessage(
+    {
+      defaultMessage:
+        "Discover {websiteName}'s writings. He talks about web development, Linux and open source mostly.",
+      description: 'BlogPage: SEO - Meta description',
+      id: '18h/t0',
+    },
+    { websiteName: website.name }
+  );
+  const pageUrl = `${website.url}${asPath}`;
+
+  const webpageSchema: WebPage = {
+    '@id': `${pageUrl}`,
+    '@type': 'WebPage',
+    breadcrumb: { '@id': `${website.url}/#breadcrumb` },
+    name: pageTitle,
+    description: pageDescription,
+    inLanguage: website.locales.default,
+    reviewedBy: { '@id': `${website.url}/#branding` },
+    url: `${website.url}`,
+    isPartOf: {
+      '@id': `${website.url}`,
+    },
+  };
+
+  const blogSchema: Blog = {
+    '@id': `${website.url}/#blog`,
+    '@type': 'Blog',
+    author: { '@id': `${website.url}/#branding` },
+    creator: { '@id': `${website.url}/#branding` },
+    editor: { '@id': `${website.url}/#branding` },
+    inLanguage: website.locales.default,
+    license: 'https://creativecommons.org/licenses/by-sa/4.0/deed.fr',
+    mainEntityOfPage: { '@id': `${pageUrl}` },
+  };
+
+  const schemaJsonLd: Graph = {
+    '@context': 'https://schema.org',
+    '@graph': [webpageSchema, blogSchema],
+  };
+
+  /**
+   * Retrieve the formatted meta.
+   *
+   * @param {Meta<'article'>} meta - The article meta.
+   * @returns {Post['meta']} The formatted meta.
+   */
+  const getPostMeta = (meta: Meta<'article'>): Post['meta'] => {
+    const { commentsCount, dates, thematics, wordsCount } = meta;
+
+    return {
+      commentsCount,
+      dates,
+      readingTime: { wordsCount: wordsCount || 0, onlyMinutes: true },
+      thematics: thematics?.map((thematic) => {
+        return { ...thematic, url: `/thematique/${thematic.slug}` };
+      }),
+    };
+  };
+
+  /**
+   * Retrieve the formatted posts.
+   *
+   * @param {Article[]} posts - An array of articles.
+   * @returns {Post[]} An array of formatted posts.
+   */
+  const getPosts = (posts: Article[]): Post[] => {
+    return posts.map((post) => {
+      return {
+        ...post,
+        cover: post.meta.cover,
+        excerpt: post.intro,
+        meta: getPostMeta(post.meta),
+        url: `/article/${post.slug}`,
+      };
+    });
+  };
+
+  /**
+   * Retrieve the posts list from raw data.
+   *
+   * @param {EdgesResponse<RawArticle>[]} rawData - The raw data.
+   * @returns {Post[]} An array of posts.
+   */
+  const getPostsList = (rawData: EdgesResponse<RawArticle>[]): Post[] => {
+    const articlesList: RawArticle[] = [];
+    rawData.forEach((articleData) =>
+      articleData.edges.forEach((edge) => {
+        articlesList.push(edge.node);
+      })
+    );
+
+    return getPosts(
+      articlesList.map((article) => getArticleFromRawData(article))
+    );
+  };
+
+  const thematicsListTitle = intl.formatMessage({
+    defaultMessage: 'Thematics',
+    description: 'BlogPage: thematics list widget title',
+    id: 'HriY57',
+  });
+
+  const topicsListTitle = intl.formatMessage({
+    defaultMessage: 'Topics',
+    description: 'BlogPage: topics list widget title',
+    id: '2D9tB5',
+  });
+
+  return (
+    <>
+      <Head>
+        <title>{pageTitle}</title>
+        <meta name="description" content={pageDescription} />
+        <meta property="og:url" content={`${pageUrl}`} />
+        <meta property="og:type" content="website" />
+        <meta property="og:title" content={pageTitleWithPageNumber} />
+        <meta property="og:description" content={pageDescription} />
+      </Head>
+      <Script
+        id="schema-blog"
+        type="application/ld+json"
+        dangerouslySetInnerHTML={{ __html: JSON.stringify(schemaJsonLd) }}
+      />
+      <PageLayout
+        title={pageTitleWithPageNumber}
+        breadcrumb={breadcrumbItems}
+        breadcrumbSchema={breadcrumbSchema}
+        headerMeta={{ total: totalArticles }}
+        widgets={[
+          <LinksListWidget
+            key="thematics-list"
+            items={getLinksListItems(
+              thematicsList.map(getPageLinkFromRawData),
+              'thematic'
+            )}
+            title={thematicsListTitle}
+            level={2}
+          />,
+          <LinksListWidget
+            key="topics-list"
+            items={getLinksListItems(
+              topicsList.map(getPageLinkFromRawData),
+              'topic'
+            )}
+            title={topicsListTitle}
+            level={2}
+          />,
+        ]}
+      >
+        <PostsList
+          baseUrl="/blog/page/"
+          byYear={true}
+          pageNumber={pageNumber}
+          posts={getPostsList([articles])}
+          total={totalArticles}
+        />
+      </PageLayout>
+    </>
+  );
+};
+
+BlogPage.getLayout = (page) =>
+  getLayout(page, { useGrid: true, withExtraPadding: true });
+
+interface BlogPageParams extends ParsedUrlQuery {
+  number: string;
+}
+
+export const getStaticProps: GetStaticProps<BlogPageProps> = async ({
+  locale,
+  params,
+}) => {
+  const pageNumber = Number(params!.number as BlogPageParams['number']);
+  const queriedPostsNumber = settings.postsPerPage * pageNumber;
+  const lastCursor = await getArticlesEndCursor({
+    first: queriedPostsNumber,
+  });
+  const articles = await getArticles({
+    first: settings.postsPerPage,
+    after: lastCursor,
+  });
+  const totalArticles = await getTotalArticles();
+  const totalThematics = await getTotalThematics();
+  const thematics = await getThematicsPreview({ first: totalThematics });
+  const totalTopics = await getTotalTopics();
+  const topics = await getTopicsPreview({ first: totalTopics });
+  const translation = await loadTranslation(locale);
+
+  return {
+    props: {
+      articles: JSON.parse(JSON.stringify(articles)),
+      pageNumber,
+      thematicsList: thematics.edges.map((edge) => edge.node),
+      topicsList: topics.edges.map((edge) => edge.node),
+      totalArticles,
+      translation,
+    },
+  };
+};
+
+export const getStaticPaths: GetStaticPaths = async () => {
+  const totalArticles = await getTotalArticles();
+  const totalPages = Math.ceil(totalArticles / settings.postsPerPage);
+  const pagesArray = Array.from(
+    { length: totalPages },
+    (_, index) => index + 1
+  );
+  const paths = pagesArray.map((number) => {
+    return { params: { number: `${number}` } };
+  });
+
+  return {
+    paths,
+    fallback: false,
+  };
+};
+
+export default BlogPage;
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