chore: create thematic page view

For now I have to repeat some markup/styles, I cannot reuse PostsList
component. WP GraphQL does not offer edges for ACF Post2Post or filters
to get thematic posts with another way.
I should create custom fields in backend to improve the posts fetching.

5 files changed, 303 insertions, 2 deletions

diff --git a/src/components/PostPreview/PostPreview.tsx b/src/components/PostPreview/PostPreview.tsx
index 3dfef73..95aca97 100644
--- a/src/components/PostPreview/PostPreview.tsx
+++ b/src/components/PostPreview/PostPreview.tsx
@@ -19,7 +19,7 @@ const PostPreview = ({
 
   return (
     <article className={styles.wrapper}>
-      {post.featuredImage && (
+      {post.featuredImage && Object.keys(post.featuredImage).length > 0 && (
         <div className={styles.cover}>
           <Image
             src={post.featuredImage.sourceUrl}
@@ -41,7 +41,7 @@ const PostPreview = ({
         dangerouslySetInnerHTML={{ __html: post.content }}
       ></div>
       <footer className={styles.footer}>
-        <Link href={post.slug}>
+        <Link href={`/article/${post.slug}`}>
           <a className={styles['read-more']}>
             {t`Read more`}
             <span className="screen-reader-text">
diff --git a/src/pages/thematique/[slug].tsx b/src/pages/thematique/[slug].tsx
new file mode 100644
index 0000000..1919b59
--- /dev/null
+++ b/src/pages/thematique/[slug].tsx
@@ -0,0 +1,77 @@
+import Layout from '@components/Layouts/Layout';
+import PostPreview from '@components/PostPreview/PostPreview';
+import { t } from '@lingui/macro';
+import {
+  fetchAllThematicsSlug,
+  getThematicBySlug,
+} from '@services/graphql/taxonomies';
+import { NextPageWithLayout } from '@ts/types/app';
+import { ThematicProps } from '@ts/types/taxonomies';
+import { loadTranslation } from '@utils/helpers/i18n';
+import { GetStaticPaths, GetStaticProps, GetStaticPropsContext } from 'next';
+import { ParsedUrlQuery } from 'querystring';
+import { ReactElement } from 'react';
+import styles from '@styles/pages/Thematic.module.scss';
+
+const Thematic: NextPageWithLayout<ThematicProps> = ({ thematic }) => {
+  const getPostsList = () => {
+    return thematic.posts.reverse().map((post) => (
+      <li key={post.id} className={styles.item}>
+        <PostPreview post={post} titleLevel={3} />
+      </li>
+    ));
+  };
+
+  return (
+    <article>
+      <header>
+        <h1>{thematic.title}</h1>
+        <div dangerouslySetInnerHTML={{ __html: thematic.intro }}></div>
+      </header>
+      <div dangerouslySetInnerHTML={{ __html: thematic.content }}></div>
+      {thematic.posts.length > 0 && (
+        <div>
+          <h2>{t`All posts in ${thematic.title}`}</h2>
+          <ol className={styles.list}>{getPostsList()}</ol>
+        </div>
+      )}
+    </article>
+  );
+};
+
+Thematic.getLayout = function getLayout(page: ReactElement) {
+  return <Layout>{page}</Layout>;
+};
+
+interface PostParams extends ParsedUrlQuery {
+  slug: string;
+}
+
+export const getStaticProps: GetStaticProps = async (
+  context: GetStaticPropsContext
+) => {
+  const translation = await loadTranslation(
+    context.locale!,
+    process.env.NODE_ENV === 'production'
+  );
+  const { slug } = context.params as PostParams;
+  const thematic = await getThematicBySlug(slug);
+
+  return {
+    props: {
+      thematic,
+      translation,
+    },
+  };
+};
+
+export const getStaticPaths: GetStaticPaths = async () => {
+  const allSlugs = await fetchAllThematicsSlug();
+
+  return {
+    paths: allSlugs.map((post) => `/thematique/${post.slug}`),
+    fallback: true,
+  };
+};
+
+export default Thematic;
diff --git a/src/services/graphql/taxonomies.ts b/src/services/graphql/taxonomies.ts
new file mode 100644
index 0000000..a14b7cb
--- /dev/null
+++ b/src/services/graphql/taxonomies.ts
@@ -0,0 +1,166 @@
+import { ArticlePreview } from '@ts/types/articles';
+import {
+  AllTaxonomiesSlugResponse,
+  FetchAllTaxonomiesSlugReturn,
+  FetchThematicByReturn,
+  GetTaxonomyByReturn,
+  Taxonomy,
+} from '@ts/types/taxonomies';
+import { gql } from 'graphql-request';
+import { getGraphQLClient } from './client';
+
+export const fetchThematicBySlug: FetchThematicByReturn = async (
+  slug: string
+) => {
+  const client = getGraphQLClient();
+  const query = gql`
+    query ThematicBySlug($slug: String!) {
+      thematicBy(slug: $slug) {
+        acfThematics {
+          postsInThematic {
+            ... on Post {
+              acfPosts {
+                postsInSubject {
+                  ... on Subject {
+                    databaseId
+                    featuredImage {
+                      node {
+                        altText
+                        sourceUrl
+                        title
+                      }
+                    }
+                    id
+                    slug
+                    title
+                  }
+                }
+                postsInThematic {
+                  ... on Thematic {
+                    databaseId
+                    id
+                    slug
+                    title
+                  }
+                }
+              }
+              id
+              commentCount
+              contentParts {
+                beforeMore
+              }
+              databaseId
+              date
+              featuredImage {
+                node {
+                  altText
+                  sourceUrl
+                  title
+                }
+              }
+              modified
+              slug
+              title
+            }
+          }
+        }
+        contentParts {
+          afterMore
+          beforeMore
+        }
+        date
+        modified
+        seo {
+          metaDesc
+          opengraphAuthor
+          opengraphDescription
+          opengraphImage {
+            altText
+            sourceUrl
+            srcSet
+          }
+          opengraphModifiedTime
+          opengraphPublishedTime
+          opengraphPublisher
+          opengraphSiteName
+          opengraphTitle
+          opengraphType
+          opengraphUrl
+          readingTime
+          title
+        }
+        title
+      }
+    }
+  `;
+
+  const variables = { slug };
+
+  try {
+    const response = client.request(query, variables);
+    return response;
+  } catch (error) {
+    console.error(error, undefined, 2);
+    process.exit(1);
+  }
+};
+
+export const getThematicBySlug: GetTaxonomyByReturn = async (slug: string) => {
+  const rawThematic = await fetchThematicBySlug(slug);
+
+  const content = rawThematic.thematicBy.contentParts.afterMore;
+  const intro = rawThematic.thematicBy.contentParts.beforeMore;
+  const rawPosts = rawThematic.thematicBy.acfThematics.postsInThematic;
+  const formattedPosts: ArticlePreview[] = rawPosts.map((post) => {
+    const content = post.contentParts.beforeMore;
+    const cover = post.featuredImage ? post.featuredImage.node : null;
+    const dates = { publication: post.date, update: post.modified };
+    const subjects =
+      post.acfPosts.postsInSubject && post.acfPosts.postsInSubject?.length > 0
+        ? post.acfPosts.postsInSubject
+        : [];
+    const thematics =
+      post.acfPosts.postsInThematic && post.acfPosts.postsInThematic?.length > 0
+        ? post.acfPosts.postsInThematic
+        : [];
+
+    return {
+      ...post,
+      content,
+      featuredImage: cover,
+      date: dates,
+      subjects,
+      thematics,
+    };
+  });
+
+  const formattedThematic: Taxonomy = {
+    ...rawThematic.thematicBy,
+    content,
+    intro,
+    posts: formattedPosts,
+  };
+
+  return formattedThematic;
+};
+
+export const fetchAllThematicsSlug: FetchAllTaxonomiesSlugReturn = async () => {
+  const client = getGraphQLClient();
+  const query = gql`
+    query AllThematicsSlug {
+      thematics {
+        nodes {
+          slug
+        }
+      }
+    }
+  `;
+
+  try {
+    const response: AllTaxonomiesSlugResponse = await client.request(query);
+    return response.thematics.nodes;
+  } catch (error) {
+    console.error(error, undefined, 2);
+    process.exit(1);
+  }
+};
diff --git a/src/styles/pages/Thematic.module.scss b/src/styles/pages/Thematic.module.scss
new file mode 100644
index 0000000..0b9aa2d
--- /dev/null
+++ b/src/styles/pages/Thematic.module.scss
@@ -0,0 +1,11 @@
+@use "@styles/abstracts/placeholders";
+
+.list {
+  @extend %reset-ordered-list;
+
+  margin: var(--spacing-md) auto;
+}
+
+li.item {
+  margin: var(--spacing-md) 0;
+}
diff --git a/src/ts/types/taxonomies.ts b/src/ts/types/taxonomies.ts
index dd45852..d090e2d 100644
--- a/src/ts/types/taxonomies.ts
+++ b/src/ts/types/taxonomies.ts
@@ -1,3 +1,4 @@
+import { ArticlePreview, ArticlePreviewResponse } from './articles';
 import { Cover } from './cover';
 
 type TaxonomyPreview = {
@@ -7,8 +8,54 @@ type TaxonomyPreview = {
   title: string;
 };
 
+export type Taxonomy = TaxonomyPreview & {
+  content: string;
+  date: string;
+  intro: string;
+  modified: string;
+  posts: ArticlePreview[];
+};
+
 export type SubjectPreview = TaxonomyPreview & {
   cover: Cover;
 };
 
 export type ThematicPreview = TaxonomyPreview;
+
+export type ThematicResponse = TaxonomyPreview & {
+  acfThematics: {
+    postsInThematic: ArticlePreviewResponse[];
+  };
+  contentParts: {
+    afterMore: string;
+    beforeMore: string;
+  };
+  date: string;
+  modified: string;
+};
+
+export type ThematicProps = {
+  thematic: Taxonomy;
+};
+
+export type AllTaxonomiesSlug = {
+  slug: string;
+};
+
+export type AllTaxonomiesSlugResponse = {
+  thematics: {
+    nodes: AllTaxonomiesSlug[];
+  };
+};
+
+export type ThematicByResponse = {
+  thematicBy: ThematicResponse;
+};
+
+export type FetchThematicByReturn = (
+  slug: string
+) => Promise<ThematicByResponse>;
+
+export type GetTaxonomyByReturn = (slug: string) => Promise<Taxonomy>;
+
+export type FetchAllTaxonomiesSlugReturn = () => Promise<AllTaxonomiesSlug[]>;