refactor(services, types): reorganize GraphQL fetchers and data types

The Typescript mapped types was useful for autocompletion in fetchers
but their are harder to maintain. I think it's better to keep each
query close to its fetcher to have a better understanding of the
fetched data. So I:
* colocate queries with their own fetcher
* colocate mutations with their own mutator
* remove Typescript mapped types for queries and mutations
* move data convertors inside graphql services
* rename most of data types and fetchers

87 files changed, 2600 insertions, 2220 deletions

diff --git a/jest.setup.js b/jest.setup.js
index 8124620..92c6c3b 100644
--- a/jest.setup.js
+++ b/jest.setup.js
@@ -5,3 +5,13 @@ import './tests/jest/__mocks__/matchMedia.mock';
 
 jest.mock('next/router', () => nextRouterMock);
 jest.mock('next/dynamic', () => () => 'dynamic-import');
+
+/* Jest complains about "Must use import to load ES Module" when importing
+ * unified and rehype modules. Maybe it is not the right way to avoid those
+ * errors but for now it is the only things that work. */
+jest.mock('src/utils/helpers/rehype.ts', () => {
+  return {
+    __esModule: true,
+    updateContentTree: jest.fn((str) => str),
+  };
+});
diff --git a/src/components/templates/page/page-comments.tsx b/src/components/templates/page/page-comments.tsx
index 170d6b7..5f5208f 100644
--- a/src/components/templates/page/page-comments.tsx
+++ b/src/components/templates/page/page-comments.tsx
@@ -6,8 +6,10 @@ import {
   useCallback,
 } from 'react';
 import { useIntl } from 'react-intl';
-import { sendComment } from '../../../services/graphql';
-import type { SendCommentInput } from '../../../types';
+import {
+  createComment,
+  type CreateCommentInput,
+} from '../../../services/graphql';
 import { Heading, Link, Section } from '../../atoms';
 import { Card, CardBody } from '../../molecules';
 import {
@@ -99,7 +101,7 @@ const PageCommentsWithRef: ForwardRefRenderFunction<
 
   const saveComment: CommentFormSubmit = useCallback(
     async (data) => {
-      const commentData: SendCommentInput = {
+      const commentData: CreateCommentInput = {
         author: data.author,
         authorEmail: data.email,
         authorUrl: data.website ?? '',
@@ -108,7 +110,7 @@ const PageCommentsWithRef: ForwardRefRenderFunction<
         content: data.comment,
         parent: data.parentId,
       };
-      const { comment, success } = await sendComment(commentData);
+      const { comment, success } = await createComment(commentData);
       const successPrefix = intl.formatMessage({
         defaultMessage: 'Thanks, your comment was successfully sent.',
         description: 'PageComments: comment form success message',
diff --git a/src/pages/404.tsx b/src/pages/404.tsx
index d6785b6..5f4f89d 100644
--- a/src/pages/404.tsx
+++ b/src/pages/404.tsx
@@ -18,25 +18,26 @@ import {
   type SearchFormSubmit,
 } from '../components';
 import {
-  getThematicsPreview,
-  getTopicsPreview,
-  getTotalThematics,
-  getTotalTopics,
+  convertTaxonomyToPageLink,
+  fetchThematicsCount,
+  fetchThematicsList,
+  fetchTopicsCount,
+  fetchTopicsList,
 } from '../services/graphql';
 import type {
   NextPageWithLayout,
-  RawThematicPreview,
-  RawTopicPreview,
+  WPThematicPreview,
+  WPTopicPreview,
 } from '../types';
 import { CONFIG } from '../utils/config';
 import { ROUTES } from '../utils/constants';
-import { getLinksItemData, getPageLinkFromRawData } from '../utils/helpers';
+import { getLinksItemData } from '../utils/helpers';
 import { loadTranslation, type Messages } from '../utils/helpers/server';
 import { useBreadcrumb } from '../utils/hooks';
 
 type Error404PageProps = {
-  thematicsList: RawThematicPreview[];
-  topicsList: RawTopicPreview[];
+  thematicsList: WPThematicPreview[];
+  topicsList: WPTopicPreview[];
   translation: Messages;
 };
 
@@ -146,11 +147,7 @@ const Error404Page: NextPageWithLayout<Error404PageProps> = ({
               {thematicsListTitle}
             </Heading>
           }
-          items={getLinksItemData(
-            thematicsList.map((thematic) =>
-              getPageLinkFromRawData(thematic, 'thematic')
-            )
-          )}
+          items={getLinksItemData(thematicsList.map(convertTaxonomyToPageLink))}
         />
         <LinksWidget
           heading={
@@ -158,9 +155,7 @@ const Error404Page: NextPageWithLayout<Error404PageProps> = ({
               {topicsListTitle}
             </Heading>
           }
-          items={getLinksItemData(
-            topicsList.map((topic) => getPageLinkFromRawData(topic, 'topic'))
-          )}
+          items={getLinksItemData(topicsList.map(convertTaxonomyToPageLink))}
         />
       </PageSidebar>
     </Page>
@@ -172,10 +167,10 @@ Error404Page.getLayout = (page) => getLayout(page);
 export const getStaticProps: GetStaticProps<Error404PageProps> = async ({
   locale,
 }) => {
-  const totalThematics = await getTotalThematics();
-  const thematics = await getThematicsPreview({ first: totalThematics });
-  const totalTopics = await getTotalTopics();
-  const topics = await getTopicsPreview({ first: totalTopics });
+  const totalThematics = await fetchThematicsCount();
+  const thematics = await fetchThematicsList({ first: totalThematics });
+  const totalTopics = await fetchTopicsCount();
+  const topics = await fetchTopicsList({ first: totalTopics });
   const translation = await loadTranslation(locale);
 
   return {
diff --git a/src/pages/article/[slug].tsx b/src/pages/article/[slug].tsx
index 224b1c5..f228ff0 100644
--- a/src/pages/article/[slug].tsx
+++ b/src/pages/article/[slug].tsx
@@ -21,9 +21,11 @@ import {
   TocWidget,
 } from '../../components';
 import {
-  getAllArticlesSlugs,
-  getAllComments,
-  getArticleBySlug,
+  convertPostToArticle,
+  convertWPCommentToComment,
+  fetchAllPostsSlugs,
+  fetchCommentsList,
+  fetchPost,
 } from '../../services/graphql';
 import styles from '../../styles/pages/article.module.scss';
 import type { Article, NextPageWithLayout, SingleComment } from '../../types';
@@ -63,8 +65,11 @@ const ArticlePage: NextPageWithLayout<ArticlePageProps> = ({
   const intl = useIntl();
   const article = useArticle({ slug, fallback: post });
   const commentsData = useComments({
-    contentId: article?.id,
     fallback: comments,
+    first: article?.meta.commentsCount,
+    where: {
+      contentId: article?.id ?? post.id,
+    },
   });
 
   const getComments = (data?: SingleComment[]) =>
@@ -73,7 +78,7 @@ const ArticlePage: NextPageWithLayout<ArticlePageProps> = ({
         author: comment.meta.author,
         content: comment.content,
         id: comment.id,
-        isApproved: comment.approved,
+        isApproved: comment.isApproved,
         publicationDate: comment.meta.date,
         replies: getComments(comment.replies),
       };
@@ -255,7 +260,7 @@ const ArticlePage: NextPageWithLayout<ArticlePageProps> = ({
         heading={title}
         intro={intro}
         meta={{
-          author: author?.name,
+          author,
           publicationDate: dates.publication,
           thematics,
           updateDate: dates.update,
@@ -292,11 +297,7 @@ const ArticlePage: NextPageWithLayout<ArticlePageProps> = ({
           ]}
         />
       </PageSidebar>
-      <PageComments
-        comments={articleComments ?? []}
-        depth={2}
-        pageId={id as number}
-      />
+      <PageComments comments={articleComments ?? []} depth={2} pageId={id} />
     </Page>
   );
 };
@@ -311,14 +312,20 @@ export const getStaticProps: GetStaticProps<ArticlePageProps> = async ({
   locale,
   params,
 }) => {
-  const post = await getArticleBySlug((params as PostParams).slug);
-  const comments = await getAllComments({ contentId: post.id as number });
+  const post = await fetchPost((params as PostParams).slug);
+  const article = await convertPostToArticle(post);
+  const comments = await fetchCommentsList({
+    first: post.commentCount ?? 1,
+    where: { contentId: post.databaseId },
+  });
   const translation = await loadTranslation(locale);
 
   return {
     props: {
-      comments: JSON.parse(JSON.stringify(comments)),
-      post: JSON.parse(JSON.stringify(post)),
+      comments: JSON.parse(
+        JSON.stringify(comments.map(convertWPCommentToComment))
+      ),
+      post: JSON.parse(JSON.stringify(article)),
       slug: post.slug,
       translation,
     },
@@ -326,7 +333,7 @@ export const getStaticProps: GetStaticProps<ArticlePageProps> = async ({
 };
 
 export const getStaticPaths: GetStaticPaths = async () => {
-  const slugs = await getAllArticlesSlugs();
+  const slugs = await fetchAllPostsSlugs();
   const paths = slugs.map((slug) => {
     return { params: { slug } };
   });
diff --git a/src/pages/blog/index.tsx b/src/pages/blog/index.tsx
index 0de5523..56cbb02 100644
--- a/src/pages/blog/index.tsx
+++ b/src/pages/blog/index.tsx
@@ -20,27 +20,28 @@ import {
   PageSidebar,
 } from '../../components';
 import {
-  getArticles,
-  getThematicsPreview,
-  getTopicsPreview,
-  getTotalArticles,
-  getTotalThematics,
-  getTotalTopics,
+  convertTaxonomyToPageLink,
+  fetchPostsCount,
+  fetchPostsList,
+  fetchThematicsCount,
+  fetchThematicsList,
+  fetchTopicsCount,
+  fetchTopicsList,
 } from '../../services/graphql';
 import styles from '../../styles/pages/blog.module.scss';
 import type {
-  EdgesResponse,
+  GraphQLConnection,
   NextPageWithLayout,
-  RawArticle,
-  RawThematicPreview,
-  RawTopicPreview,
+  WPPostPreview,
+  WPThematicPreview,
+  WPTopicPreview,
 } from '../../types';
 import { CONFIG } from '../../utils/config';
 import { ROUTES } from '../../utils/constants';
 import {
   getBlogSchema,
   getLinksItemData,
-  getPageLinkFromRawData,
+  getPostsWithUrl,
   getSchemaJson,
   getWebPageSchema,
 } from '../../utils/helpers';
@@ -48,9 +49,9 @@ import { loadTranslation, type Messages } from '../../utils/helpers/server';
 import { useBreadcrumb, useIsMounted, usePostsList } from '../../utils/hooks';
 
 type BlogPageProps = {
-  articles: EdgesResponse<RawArticle>;
-  thematicsList: RawThematicPreview[];
-  topicsList: RawTopicPreview[];
+  posts: GraphQLConnection<WPPostPreview>;
+  thematicsList: WPThematicPreview[];
+  topicsList: WPTopicPreview[];
   totalArticles: number;
   translation: Messages;
 };
@@ -59,7 +60,7 @@ type BlogPageProps = {
  * Blog index page.
  */
 const BlogPage: NextPageWithLayout<BlogPageProps> = ({
-  articles,
+  posts,
   thematicsList,
   topicsList,
   totalArticles,
@@ -111,6 +112,7 @@ const BlogPage: NextPageWithLayout<BlogPageProps> = ({
   const schemaJsonLd = getSchemaJson([webpageSchema, blogSchema]);
 
   const {
+    articles,
     error,
     firstNewResultIndex,
     isLoading,
@@ -118,10 +120,9 @@ const BlogPage: NextPageWithLayout<BlogPageProps> = ({
     isRefreshing,
     hasNextPage,
     loadMore,
-    posts,
   } = usePostsList({
-    fallback: [articles],
-    fetcher: getArticles,
+    fallback: [posts],
+    fetcher: fetchPostsList,
     perPage: CONFIG.postsPerPage,
   });
 
@@ -191,6 +192,10 @@ const BlogPage: NextPageWithLayout<BlogPageProps> = ({
     id: 'AXe1Iz',
   });
 
+  const blogArticles = articles?.flatMap((p) =>
+    p.edges.map((edge) => edge.node)
+  );
+
   return (
     <Page breadcrumbs={breadcrumbItems} isBodyLastChild>
       <Head>
@@ -218,13 +223,13 @@ const BlogPage: NextPageWithLayout<BlogPageProps> = ({
       />
       <PageHeader heading={title} meta={{ total: totalArticles }} />
       <PageBody className={styles.body}>
-        {posts ? (
+        {blogArticles ? (
           <PostsList
             className={styles.list}
             firstNewResult={firstNewResultIndex}
             isLoading={isLoading || isLoadingMore || isRefreshing}
             onLoadMore={hasNextPage && isMounted ? loadMore : undefined}
-            posts={posts}
+            posts={getPostsWithUrl(blogArticles)}
             ref={postsListRef}
             sortByYear
             total={isMounted ? totalArticles : undefined}
@@ -260,11 +265,7 @@ const BlogPage: NextPageWithLayout<BlogPageProps> = ({
               {thematicsListTitle}
             </Heading>
           }
-          items={getLinksItemData(
-            thematicsList.map((thematic) =>
-              getPageLinkFromRawData(thematic, 'thematic')
-            )
-          )}
+          items={getLinksItemData(thematicsList.map(convertTaxonomyToPageLink))}
         />
         <LinksWidget
           heading={
@@ -272,9 +273,7 @@ const BlogPage: NextPageWithLayout<BlogPageProps> = ({
               {topicsListTitle}
             </Heading>
           }
-          items={getLinksItemData(
-            topicsList.map((topic) => getPageLinkFromRawData(topic, 'topic'))
-          )}
+          items={getLinksItemData(topicsList.map(convertTaxonomyToPageLink))}
         />
       </PageSidebar>
     </Page>
@@ -286,17 +285,17 @@ BlogPage.getLayout = (page) => getLayout(page);
 export const getStaticProps: GetStaticProps<BlogPageProps> = async ({
   locale,
 }) => {
-  const articles = await getArticles({ first: CONFIG.postsPerPage });
-  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 posts = await fetchPostsList({ first: CONFIG.postsPerPage });
+  const totalArticles = await fetchPostsCount();
+  const totalThematics = await fetchThematicsCount();
+  const thematics = await fetchThematicsList({ first: totalThematics });
+  const totalTopics = await fetchTopicsCount();
+  const topics = await fetchTopicsList({ first: totalTopics });
   const translation = await loadTranslation(locale);
 
   return {
     props: {
-      articles: JSON.parse(JSON.stringify(articles)),
+      posts: JSON.parse(JSON.stringify(posts)),
       thematicsList: thematics.edges.map((edge) => edge.node),
       topicsList: topics.edges.map((edge) => edge.node),
       totalArticles,
diff --git a/src/pages/blog/page/[number].tsx b/src/pages/blog/page/[number].tsx
index b254603..d6071d1 100644
--- a/src/pages/blog/page/[number].tsx
+++ b/src/pages/blog/page/[number].tsx
@@ -20,27 +20,28 @@ import {
   PageSidebar,
 } from '../../../components';
 import {
-  getArticles,
-  getArticlesEndCursor,
-  getThematicsPreview,
-  getTopicsPreview,
-  getTotalArticles,
-  getTotalThematics,
-  getTotalTopics,
+  convertTaxonomyToPageLink,
+  fetchLastPostCursor,
+  fetchPostsCount,
+  fetchPostsList,
+  fetchThematicsCount,
+  fetchThematicsList,
+  fetchTopicsCount,
+  fetchTopicsList,
 } from '../../../services/graphql';
 import type {
-  EdgesResponse,
+  GraphQLConnection,
   NextPageWithLayout,
-  RawArticle,
-  RawThematicPreview,
-  RawTopicPreview,
+  WPPostPreview,
+  WPThematicPreview,
+  WPTopicPreview,
 } from '../../../types';
 import { CONFIG } from '../../../utils/config';
 import { ROUTES } from '../../../utils/constants';
 import {
   getBlogSchema,
   getLinksItemData,
-  getPageLinkFromRawData,
+  getPostsWithUrl,
   getSchemaJson,
   getWebPageSchema,
 } from '../../../utils/helpers';
@@ -52,10 +53,10 @@ import {
 } from '../../../utils/hooks';
 
 type BlogPageProps = {
-  articles: EdgesResponse<RawArticle>;
   pageNumber: number;
-  thematicsList: RawThematicPreview[];
-  topicsList: RawTopicPreview[];
+  posts: GraphQLConnection<WPPostPreview>;
+  thematicsList: WPThematicPreview[];
+  topicsList: WPTopicPreview[];
   totalArticles: number;
   translation: Messages;
 };
@@ -64,8 +65,8 @@ type BlogPageProps = {
  * Blog index page.
  */
 const BlogPage: NextPageWithLayout<BlogPageProps> = ({
-  articles,
   pageNumber,
+  posts,
   thematicsList,
   topicsList,
   totalArticles,
@@ -75,9 +76,9 @@ const BlogPage: NextPageWithLayout<BlogPageProps> = ({
     redirectTo: ROUTES.BLOG,
   });
 
-  const { posts } = usePostsList({
-    fallback: [articles],
-    fetcher: getArticles,
+  const { articles } = usePostsList({
+    fallback: [posts],
+    fetcher: fetchPostsList,
     perPage: CONFIG.postsPerPage,
   });
   const intl = useIntl();
@@ -195,6 +196,10 @@ const BlogPage: NextPageWithLayout<BlogPageProps> = ({
     id: 'AXe1Iz',
   });
 
+  const blogPageArticles = articles?.flatMap((p) =>
+    p.edges.map((edge) => edge.node)
+  );
+
   return (
     <Page breadcrumbs={breadcrumbItems} isBodyLastChild>
       <Head>
@@ -225,7 +230,7 @@ const BlogPage: NextPageWithLayout<BlogPageProps> = ({
         meta={{ total: totalArticles }}
       />
       <PageBody>
-        <PostsList posts={posts ?? []} sortByYear />
+        <PostsList posts={getPostsWithUrl(blogPageArticles ?? [])} sortByYear />
         <Pagination
           aria-label={paginationAriaLabel}
           current={pageNumber}
@@ -242,11 +247,7 @@ const BlogPage: NextPageWithLayout<BlogPageProps> = ({
               {thematicsListTitle}
             </Heading>
           }
-          items={getLinksItemData(
-            thematicsList.map((thematic) =>
-              getPageLinkFromRawData(thematic, 'thematic')
-            )
-          )}
+          items={getLinksItemData(thematicsList.map(convertTaxonomyToPageLink))}
         />
         <LinksWidget
           heading={
@@ -254,9 +255,7 @@ const BlogPage: NextPageWithLayout<BlogPageProps> = ({
               {topicsListTitle}
             </Heading>
           }
-          items={getLinksItemData(
-            topicsList.map((topic) => getPageLinkFromRawData(topic, 'topic'))
-          )}
+          items={getLinksItemData(topicsList.map(convertTaxonomyToPageLink))}
         />
       </PageSidebar>
     </Page>
@@ -274,23 +273,23 @@ export const getStaticProps: GetStaticProps<BlogPageProps> = async ({
   params,
 }) => {
   const pageNumber = Number((params as BlogPageParams).number);
-  const lastCursor = await getArticlesEndCursor({
-    first: CONFIG.postsPerPage * pageNumber,
-  });
-  const articles = await getArticles({
+  const lastCursor = await fetchLastPostCursor(
+    CONFIG.postsPerPage * pageNumber
+  );
+  const posts = await fetchPostsList({
     first: CONFIG.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 totalArticles = await fetchPostsCount();
+  const totalThematics = await fetchThematicsCount();
+  const thematics = await fetchThematicsList({ first: totalThematics });
+  const totalTopics = await fetchTopicsCount();
+  const topics = await fetchTopicsList({ first: totalTopics });
   const translation = await loadTranslation(locale);
 
   return {
     props: {
-      articles: JSON.parse(JSON.stringify(articles)),
+      posts: JSON.parse(JSON.stringify(posts)),
       pageNumber,
       thematicsList: thematics.edges.map((edge) => edge.node),
       topicsList: topics.edges.map((edge) => edge.node),
@@ -301,7 +300,7 @@ export const getStaticProps: GetStaticProps<BlogPageProps> = async ({
 };
 
 export const getStaticPaths: GetStaticPaths = async () => {
-  const totalArticles = await getTotalArticles();
+  const totalArticles = await fetchPostsCount();
   const totalPages = Math.ceil(totalArticles / CONFIG.postsPerPage);
   const pagesArray = Array.from(
     { length: totalPages },
diff --git a/src/pages/index.tsx b/src/pages/index.tsx
index 56de5b5..7bd8aec 100644
--- a/src/pages/index.tsx
+++ b/src/pages/index.tsx
@@ -26,9 +26,12 @@ import {
 } from '../components';
 import { mdxComponents } from '../components/mdx';
 import HomePageContent from '../content/pages/homepage.mdx';
-import { getArticlesCard } from '../services/graphql';
+import {
+  convertRecentPostToRecentArticle,
+  fetchRecentPosts,
+} from '../services/graphql';
 import styles from '../styles/pages/home.module.scss';
-import type { ArticleCard, NextPageWithLayout } from '../types';
+import type { NextPageWithLayout, RecentArticle } from '../types';
 import { CONFIG } from '../utils/config';
 import { PERSONAL_LINKS, ROUTES } from '../utils/constants';
 import { getSchemaJson, getWebPageSchema } from '../utils/helpers';
@@ -229,7 +232,7 @@ const HomePageSection: FC<PageSectionProps> = ({
 );
 
 type HomeProps = {
-  recentPosts: ArticleCard[];
+  recentPosts: RecentArticle[];
   translation?: Messages;
 };
 
@@ -277,7 +280,7 @@ const HomePage: NextPageWithLayout<HomeProps> = ({ recentPosts }) => {
                   hasBorderedValues
                   isCentered
                   label={publicationDate}
-                  value={<Time date={post.dates.publication} />}
+                  value={<Time date={post.publicationDate} />}
                 />
               </CardMeta>
             }
@@ -365,11 +368,13 @@ HomePage.getLayout = (page) => getLayout(page, { isHome: true });
 
 export const getStaticProps: GetStaticProps<HomeProps> = async ({ locale }) => {
   const translation = await loadTranslation(locale);
-  const recentPosts = await getArticlesCard({ first: 3 });
+  const recentPosts = await fetchRecentPosts({ first: 3 });
 
   return {
     props: {
-      recentPosts,
+      recentPosts: recentPosts.edges.map((edge) =>
+        convertRecentPostToRecentArticle(edge.node)
+      ),
       translation,
     },
   };
diff --git a/src/pages/projets/[slug].tsx b/src/pages/projets/[slug].tsx
index 2911951..ee88638 100644
--- a/src/pages/projets/[slug].tsx
+++ b/src/pages/projets/[slug].tsx
@@ -24,7 +24,7 @@ import {
 } from '../../components';
 import { mdxComponents } from '../../components/mdx';
 import styles from '../../styles/pages/project.module.scss';
-import type { NextPageWithLayout, ProjectPreview, Repos } from '../../types';
+import type { NextPageWithLayout, Project, Repos } from '../../types';
 import { CONFIG } from '../../utils/config';
 import { ROUTES } from '../../utils/constants';
 import {
@@ -45,7 +45,7 @@ import {
 } from '../../utils/hooks';
 
 type ProjectPageProps = {
-  project: ProjectPreview;
+  project: Project;
   translation: Messages;
 };
 
diff --git a/src/pages/projets/index.tsx b/src/pages/projets/index.tsx
index 00c5a70..4e0bf92 100644
--- a/src/pages/projets/index.tsx
+++ b/src/pages/projets/index.tsx
@@ -22,7 +22,7 @@ import {
 import { mdxComponents } from '../../components/mdx';
 import PageContent, { meta } from '../../content/pages/projects.mdx';
 import styles from '../../styles/pages/projects.module.scss';
-import type { NextPageWithLayout, ProjectCard } from '../../types';
+import type { NextPageWithLayout, ProjectPreview } from '../../types';
 import { CONFIG } from '../../utils/config';
 import { ROUTES } from '../../utils/constants';
 import {
@@ -38,7 +38,7 @@ import {
 import { useBreadcrumb } from '../../utils/hooks';
 
 type ProjectsPageProps = {
-  projects: ProjectCard[];
+  projects: ProjectPreview[];
   translation?: Messages;
 };
 
diff --git a/src/pages/recherche/index.tsx b/src/pages/recherche/index.tsx
index 2a18aa3..293df0e 100644
--- a/src/pages/recherche/index.tsx
+++ b/src/pages/recherche/index.tsx
@@ -20,25 +20,26 @@ import {
   PageBody,
 } from '../../components';
 import {
-  getArticles,
-  getThematicsPreview,
-  getTopicsPreview,
-  getTotalArticles,
-  getTotalThematics,
-  getTotalTopics,
+  convertTaxonomyToPageLink,
+  fetchPostsCount,
+  fetchPostsList,
+  fetchThematicsCount,
+  fetchThematicsList,
+  fetchTopicsCount,
+  fetchTopicsList,
 } from '../../services/graphql';
 import styles from '../../styles/pages/blog.module.scss';
 import type {
   NextPageWithLayout,
-  RawThematicPreview,
-  RawTopicPreview,
+  WPThematicPreview,
+  WPTopicPreview,
 } from '../../types';
 import { CONFIG } from '../../utils/config';
 import { ROUTES } from '../../utils/constants';
 import {
   getBlogSchema,
   getLinksItemData,
-  getPageLinkFromRawData,
+  getPostsWithUrl,
   getSchemaJson,
   getWebPageSchema,
 } from '../../utils/helpers';
@@ -46,8 +47,8 @@ import { loadTranslation, type Messages } from '../../utils/helpers/server';
 import { useBreadcrumb, useDataFromAPI, usePostsList } from '../../utils/hooks';
 
 type SearchPageProps = {
-  thematicsList: RawThematicPreview[];
-  topicsList: RawTopicPreview[];
+  thematicsList: WPThematicPreview[];
+  topicsList: WPTopicPreview[];
   translation: Messages;
 };
 
@@ -115,6 +116,7 @@ const SearchPage: NextPageWithLayout<SearchPageProps> = ({
   const schemaJsonLd = getSchemaJson([webpageSchema, blogSchema]);
 
   const {
+    articles,
     error,
     firstNewResultIndex,
     isLoading,
@@ -122,16 +124,15 @@ const SearchPage: NextPageWithLayout<SearchPageProps> = ({
     isRefreshing,
     hasNextPage,
     loadMore,
-    posts,
   } = usePostsList({
     fallback: [],
-    fetcher: getArticles,
+    fetcher: fetchPostsList,
     perPage: CONFIG.postsPerPage,
     searchQuery: query.s as string,
   });
 
   const totalArticles = useDataFromAPI<number>(async () =>
-    getTotalArticles(query.s as string)
+    fetchPostsCount({ search: query.s as string })
   );
 
   const thematicsListTitle = intl.formatMessage({
@@ -172,6 +173,10 @@ const SearchPage: NextPageWithLayout<SearchPageProps> = ({
     [intl, routerPush]
   );
 
+  const foundArticles = articles?.flatMap((p) =>
+    p.edges.map((edge) => edge.node)
+  );
+
   return (
     <Page breadcrumbs={breadcrumbItems} isBodyLastChild>
       <Head>
@@ -199,14 +204,14 @@ const SearchPage: NextPageWithLayout<SearchPageProps> = ({
       />
       <PageHeader heading={title} meta={{ total: totalArticles }} />
       <PageBody className={styles.body}>
-        {posts ? null : <Spinner>{loadingResults}</Spinner>}
-        {posts?.length ? (
+        {foundArticles ? null : <Spinner>{loadingResults}</Spinner>}
+        {foundArticles?.length ? (
           <PostsList
             className={styles.list}
             firstNewResult={firstNewResultIndex}
             isLoading={isLoading || isLoadingMore || isRefreshing}
             onLoadMore={hasNextPage ? loadMore : undefined}
-            posts={posts}
+            posts={getPostsWithUrl(foundArticles)}
             sortByYear
           />
         ) : (
@@ -248,11 +253,7 @@ const SearchPage: NextPageWithLayout<SearchPageProps> = ({
               {thematicsListTitle}
             </Heading>
           }
-          items={getLinksItemData(
-            thematicsList.map((thematic) =>
-              getPageLinkFromRawData(thematic, 'thematic')
-            )
-          )}
+          items={getLinksItemData(thematicsList.map(convertTaxonomyToPageLink))}
         />
         <LinksWidget
           heading={
@@ -260,9 +261,7 @@ const SearchPage: NextPageWithLayout<SearchPageProps> = ({
               {topicsListTitle}
             </Heading>
           }
-          items={getLinksItemData(
-            topicsList.map((topic) => getPageLinkFromRawData(topic, 'topic'))
-          )}
+          items={getLinksItemData(topicsList.map(convertTaxonomyToPageLink))}
         />
       </PageSidebar>
     </Page>
@@ -274,10 +273,10 @@ SearchPage.getLayout = (page) => getLayout(page);
 export const getStaticProps: GetStaticProps<SearchPageProps> = async ({
   locale,
 }) => {
-  const totalThematics = await getTotalThematics();
-  const thematics = await getThematicsPreview({ first: totalThematics });
-  const totalTopics = await getTotalTopics();
-  const topics = await getTopicsPreview({ first: totalTopics });
+  const totalThematics = await fetchThematicsCount();
+  const thematics = await fetchThematicsList({ first: totalThematics });
+  const totalTopics = await fetchTopicsCount();
+  const topics = await fetchTopicsList({ first: totalTopics });
   const translation = await loadTranslation(locale);
 
   return {
diff --git a/src/pages/sujet/[slug].tsx b/src/pages/sujet/[slug].tsx
index 30adec3..aed7ea9 100644
--- a/src/pages/sujet/[slug].tsx
+++ b/src/pages/sujet/[slug].tsx
@@ -18,10 +18,11 @@ import {
   PageBody,
 } from '../../components';
 import {
-  getAllTopicsSlugs,
-  getTopicBySlug,
-  getTopicsPreview,
-  getTotalTopics,
+  convertTaxonomyToPageLink,
+  fetchAllTopicsSlugs,
+  fetchTopic,
+  fetchTopicsCount,
+  fetchTopicsList,
 } from '../../services/graphql';
 import styles from '../../styles/pages/blog.module.scss';
 import type { NextPageWithLayout, PageLink, Topic } from '../../types';
@@ -29,7 +30,6 @@ import { CONFIG } from '../../utils/config';
 import { ROUTES } from '../../utils/constants';
 import {
   getLinksItemData,
-  getPageLinkFromRawData,
   getPostsWithUrl,
   getSchemaJson,
   getSinglePageSchema,
@@ -208,13 +208,13 @@ export const getStaticProps: GetStaticProps<TopicPageProps> = async ({
   locale,
   params,
 }) => {
-  const currentTopic = await getTopicBySlug((params as TopicParams).slug);
-  const totalTopics = await getTotalTopics();
-  const allTopicsEdges = await getTopicsPreview({
+  const currentTopic = await fetchTopic((params as TopicParams).slug);
+  const totalTopics = await fetchTopicsCount();
+  const allTopicsEdges = await fetchTopicsList({
     first: totalTopics,
   });
   const allTopics = allTopicsEdges.edges.map((edge) =>
-    getPageLinkFromRawData(edge.node, 'topic')
+    convertTaxonomyToPageLink(edge.node)
   );
   const topicsLinks = allTopics.filter(
     (topic) => topic.url !== `${ROUTES.TOPICS}/${(params as TopicParams).slug}`
@@ -231,7 +231,7 @@ export const getStaticProps: GetStaticProps<TopicPageProps> = async ({
 };
 
 export const getStaticPaths: GetStaticPaths = async () => {
-  const slugs = await getAllTopicsSlugs();
+  const slugs = await fetchAllTopicsSlugs();
   const paths = slugs.map((slug) => {
     return { params: { slug } };
   });
diff --git a/src/pages/thematique/[slug].tsx b/src/pages/thematique/[slug].tsx
index b8518c5..a44c98b 100644
--- a/src/pages/thematique/[slug].tsx
+++ b/src/pages/thematique/[slug].tsx
@@ -17,10 +17,11 @@ import {
   PageBody,
 } from '../../components';
 import {
-  getAllThematicsSlugs,
-  getThematicBySlug,
-  getThematicsPreview,
-  getTotalThematics,
+  convertTaxonomyToPageLink,
+  fetchAllThematicsSlugs,
+  fetchThematic,
+  fetchThematicsCount,
+  fetchThematicsList,
 } from '../../services/graphql';
 import styles from '../../styles/pages/blog.module.scss';
 import type { NextPageWithLayout, PageLink, Thematic } from '../../types';
@@ -28,7 +29,6 @@ import { CONFIG } from '../../utils/config';
 import { ROUTES } from '../../utils/constants';
 import {
   getLinksItemData,
-  getPageLinkFromRawData,
   getPostsWithUrl,
   getSchemaJson,
   getSinglePageSchema,
@@ -191,15 +191,13 @@ export const getStaticProps: GetStaticProps<ThematicPageProps> = async ({
   locale,
   params,
 }) => {
-  const currentThematic = await getThematicBySlug(
-    (params as ThematicParams).slug
-  );
-  const totalThematics = await getTotalThematics();
-  const allThematicsEdges = await getThematicsPreview({
+  const currentThematic = await fetchThematic((params as ThematicParams).slug);
+  const totalThematics = await fetchThematicsCount();
+  const allThematicsEdges = await fetchThematicsList({
     first: totalThematics,
   });
   const allThematics = allThematicsEdges.edges.map((edge) =>
-    getPageLinkFromRawData(edge.node, 'thematic')
+    convertTaxonomyToPageLink(edge.node)
   );
   const allThematicsLinks = allThematics.filter(
     (thematic) =>
@@ -218,7 +216,7 @@ export const getStaticProps: GetStaticProps<ThematicPageProps> = async ({
 };
 
 export const getStaticPaths: GetStaticPaths = async () => {
-  const slugs = await getAllThematicsSlugs();
+  const slugs = await fetchAllThematicsSlugs();
   const paths = slugs.map((slug) => {
     return { params: { slug } };
   });
diff --git a/src/services/graphql/api.ts b/src/services/graphql/api.ts
deleted file mode 100644
index 003f92d..0000000
--- a/src/services/graphql/api.ts
+++ /dev/null
@@ -1,83 +0,0 @@
-import type {
-  Mutations,
-  MutationsInputMap,
-  MutationsResponseMap,
-  Queries,
-  QueriesInputMap,
-  QueriesResponseMap,
-} from '../../types';
-import { CONFIG } from '../../utils/config';
-
-/**
- * Retrieve the API url from settings.
- *
- * @returns {string} The API url.
- */
-export const getAPIUrl = (): string => {
-  const { url } = CONFIG.api;
-
-  if (!url) {
-    throw new Error('API url is not defined.');
-  }
-
-  return url;
-};
-
-export type ResponseMap<T, K extends Mutations | Queries> = K extends Mutations
-  ? MutationsResponseMap<T>
-  : QueriesResponseMap<T>;
-
-export type InputMap<T extends Mutations | Queries> = T extends Mutations
-  ? MutationsInputMap
-  : QueriesInputMap;
-
-type FetchAPIVariables<T> = T extends Queries
-  ? QueriesInputMap[T]
-  : T extends Mutations
-  ? MutationsInputMap[T]
-  : never;
-
-type FetchAPIProps<Q extends Queries | Mutations, V = FetchAPIVariables<Q>> = {
-  query: Q;
-  variables?: V;
-};
-
-type FetchAPIResponse<T, K extends Queries | Mutations> = K extends Queries
-  ? QueriesResponseMap<T>[K]
-  : K extends Mutations
-  ? MutationsResponseMap<T>[K]
-  : never;
-
-export const fetchAPI = async <T, K extends Queries | Mutations>({
-  query,
-  variables,
-}: FetchAPIProps<K>): Promise<FetchAPIResponse<T, K>> => {
-  const response = await fetch(getAPIUrl(), {
-    method: 'POST',
-    headers: {
-      'content-type': 'application/json;charset=UTF-8',
-    },
-    body: JSON.stringify({
-      query,
-      variables,
-    }),
-  });
-
-  type JSONResponse = {
-    data?: FetchAPIResponse<T, K>;
-    errors?: { message: string }[];
-  };
-
-  const { data, errors }: JSONResponse = await response.json();
-
-  if (response.ok) {
-    if (!data) return Promise.reject(new Error(`No data found"`));
-
-    return data;
-  }
-  console.error('Failed to fetch API');
-  const error = new Error(
-    errors?.map((e) => e.message).join('\n') ?? 'unknown'
-  );
-  return Promise.reject(error);
-};
diff --git a/src/services/graphql/articles.query.ts b/src/services/graphql/articles.query.ts
deleted file mode 100644
index 46e3df6..0000000
--- a/src/services/graphql/articles.query.ts
+++ /dev/null
@@ -1,191 +0,0 @@
-/**
- * Query the full article data using its slug.
- */
-export const articleBySlugQuery = `query PostBy($slug: ID!) {
-  post(id: $slug, idType: SLUG) {
-    acfPosts {
-      postsInThematic {
-        ... on Thematic {
-          databaseId
-          slug
-          title
-        }
-      }
-      postsInTopic {
-        ... on Topic {
-          databaseId
-          featuredImage {
-            node {
-              altText
-              mediaDetails {
-                height
-                width
-              }
-              sourceUrl
-              title
-            }
-          }
-          slug
-          title
-        }
-      }
-    }
-    author {
-      node {
-        gravatarUrl
-        name
-        url
-      }
-    }
-    commentCount
-    contentParts {
-      afterMore
-      beforeMore
-    }
-    databaseId
-    date
-    featuredImage {
-      node {
-        altText
-        mediaDetails {
-          height
-          width
-        }
-        sourceUrl
-        title
-      }
-    }
-    info {
-      wordsCount
-    }
-    modified
-    seo {
-      metaDesc
-      title
-    }
-    slug
-    title
-  }
-}`;
-
-/**
- * Query an array of partial articles.
- */
-export const articlesQuery = `query Articles($after: String = "", $first: Int = 10, $search: String = "") {
-  posts(
-    after: $after
-    first: $first
-    where: {orderby: {field: DATE, order: DESC}, search: $search, status: PUBLISH}
-  ) {
-    edges {
-      cursor
-      node {
-        acfPosts {
-          postsInThematic {
-            ... on Thematic {
-              databaseId
-              slug
-              title
-            }
-          }
-        }
-        commentCount
-        contentParts {
-          beforeMore
-        }
-        databaseId
-        date
-        featuredImage {
-          node {
-            altText
-            mediaDetails {
-              height
-              width
-            }
-            sourceUrl
-            title
-          }
-        }
-        info {
-          wordsCount
-        }
-        modified
-        slug
-        title
-      }
-    }
-    pageInfo {
-      endCursor
-      hasNextPage
-      total
-    }
-  }
-}`;
-
-/**
- * Query an array of articles with only the minimal data.
- */
-export const articlesCardQuery = `query ArticlesCard($first: Int = 10) {
-  posts(
-    first: $first
-    where: {orderby: {field: DATE, order: DESC}, status: PUBLISH}
-  ) {
-    nodes {
-      databaseId
-      date
-      featuredImage {
-        node {
-          altText
-          mediaDetails {
-            height
-            width
-          }
-          sourceUrl
-          title
-        }
-      }
-      slug
-      title
-    }
-  }
-}`;
-
-/**
- * Query an array of articles slug.
- */
-export const articlesSlugQuery = `query ArticlesSlug($first: Int = 10, $after: String = "") {
-  posts(after: $after, first: $first) {
-    edges {
-      cursor
-      node {
-        slug
-      }
-    }
-    pageInfo {
-      total
-    }
-  }
-}`;
-
-/**
- * Query the total number of articles.
- */
-export const totalArticlesQuery = `query PostsTotal($search: String = "") {
-  posts(where: {search: $search}) {
-    pageInfo {
-      total
-    }
-  }
-}`;
-
-/**
- * Query the end cursor based on the queried posts number.
- */
-export const articlesEndCursorQuery = `query EndCursorAfter($first: Int) {
-  posts(first: $first) {
-    pageInfo {
-      hasNextPage
-      endCursor
-    }
-  }
-}`;
diff --git a/src/services/graphql/articles.ts b/src/services/graphql/articles.ts
deleted file mode 100644
index 82bde41..0000000
--- a/src/services/graphql/articles.ts
+++ /dev/null
@@ -1,201 +0,0 @@
-import type {
-  Article,
-  ArticleCard,
-  EdgesResponse,
-  EndCursorResponse,
-  GraphQLEdgesInput,
-  GraphQLPageInfo,
-  RawArticle,
-  RawArticlePreview,
-  Slug,
-  TotalItems,
-} from '../../types';
-import {
-  getAuthorFromRawData,
-  getImageFromRawData,
-  getPageLinkFromRawData,
-  updateContentTree,
-} from '../../utils/helpers';
-import { fetchAPI } from './api';
-import {
-  articleBySlugQuery,
-  articlesCardQuery,
-  articlesEndCursorQuery,
-  articlesQuery,
-  articlesSlugQuery,
-  totalArticlesQuery,
-} from './articles.query';
-
-/**
- * Retrieve the total number of articles.
- *
- * @returns {Promise<number>} - The articles total number.
- */
-export const getTotalArticles = async (search?: string): Promise<number> => {
-  const response = await fetchAPI<TotalItems, typeof totalArticlesQuery>({
-    query: totalArticlesQuery,
-    variables: { search },
-  });
-
-  return response.posts.pageInfo.total;
-};
-
-export type GetArticlesReturn = {
-  articles: Article[];
-  pageInfo: GraphQLPageInfo;
-};
-
-/**
- * Convert raw data to an Article object.
- *
- * @param {RawArticle} data - The page raw data.
- * @returns {Article} The page data.
- */
-export const getArticleFromRawData = async (
-  data: RawArticle
-): Promise<Article> => {
-  const {
-    acfPosts,
-    author,
-    commentCount,
-    contentParts,
-    databaseId,
-    date,
-    featuredImage,
-    info,
-    modified,
-    slug,
-    title,
-    seo,
-  } = data;
-
-  return {
-    content: await updateContentTree(contentParts.afterMore),
-    id: databaseId,
-    intro: contentParts.beforeMore,
-    meta: {
-      author: author && getAuthorFromRawData(author.node, 'page'),
-      commentsCount: commentCount ?? 0,
-      cover: featuredImage?.node
-        ? getImageFromRawData(featuredImage.node)
-        : undefined,
-      dates: { publication: date, update: modified },
-      seo: {
-        description: seo?.metaDesc ?? '',
-        title: seo?.title ?? '',
-      },
-      thematics: acfPosts.postsInThematic?.map((thematic) =>
-        getPageLinkFromRawData(thematic, 'thematic')
-      ),
-      topics: acfPosts.postsInTopic?.map((topic) =>
-        getPageLinkFromRawData(topic, 'topic')
-      ),
-      wordsCount: info.wordsCount,
-    },
-    slug,
-    title,
-  };
-};
-
-/**
- * Retrieve the given number of articles from API.
- *
- * @param {GraphQLEdgesInput} props - An object of GraphQL variables.
- * @returns {Promise<EdgesResponse<RawArticle>>} The articles data.
- */
-export const getArticles = async (
-  props: GraphQLEdgesInput
-): Promise<EdgesResponse<RawArticle>> => {
-  const response = await fetchAPI<RawArticle, typeof articlesQuery>({
-    query: articlesQuery,
-    variables: { ...props },
-  });
-
-  return response.posts;
-};
-
-/**
- * Convert a raw article preview to an article card.
- *
- * @param {RawArticlePreview} data - A raw article preview.
- * @returns {ArticleCard} An article card.
- */
-const getArticleCardFromRawData = (data: RawArticlePreview): ArticleCard => {
-  const { databaseId, date, featuredImage, slug, title } = data;
-
-  return {
-    cover: featuredImage ? getImageFromRawData(featuredImage.node) : undefined,
-    dates: { publication: date },
-    id: databaseId,
-    slug,
-    title,
-  };
-};
-
-/**
- * Retrieve the given number of article cards from API.
- *
- * @param {GraphQLEdgesInput} obj - An object.
- * @param {number} obj.first - The number of articles.
- * @returns {Promise<ArticleCard[]>} - The article cards data.
- */
-export const getArticlesCard = async ({
-  first,
-}: GraphQLEdgesInput): Promise<ArticleCard[]> => {
-  const response = await fetchAPI<RawArticlePreview, typeof articlesCardQuery>({
-    query: articlesCardQuery,
-    variables: { first },
-  });
-
-  return response.posts.nodes.map((node) => getArticleCardFromRawData(node));
-};
-
-/**
- * Retrieve an Article object by slug.
- *
- * @param {string} slug - The article slug.
- * @returns {Promise<Article>} The requested article.
- */
-export const getArticleBySlug = async (slug: string): Promise<Article> => {
-  const response = await fetchAPI<RawArticle, typeof articleBySlugQuery>({
-    query: articleBySlugQuery,
-    variables: { slug },
-  });
-
-  return getArticleFromRawData(response.post);
-};
-
-/**
- * Retrieve all the articles slugs.
- *
- * @returns {Promise<string[]>} - An array of articles slugs.
- */
-export const getAllArticlesSlugs = async (): Promise<string[]> => {
-  const totalArticles = await getTotalArticles();
-  const response = await fetchAPI<Slug, typeof articlesSlugQuery>({
-    query: articlesSlugQuery,
-    variables: { first: totalArticles },
-  });
-
-  return response.posts.edges.map((edge) => edge.node.slug);
-};
-
-/**
- * Retrieve the last cursor.
- *
- * @param {GraphQLEdgesInput} props - An object of GraphQL variables.
- * @returns {Promise<string>} - The end cursor.
- */
-export const getArticlesEndCursor = async (
-  props: GraphQLEdgesInput
-): Promise<string> => {
-  const response = await fetchAPI<
-    EndCursorResponse,
-    typeof articlesEndCursorQuery
-  >({
-    query: articlesEndCursorQuery,
-    variables: { ...props },
-  });
-
-  return response.posts.pageInfo.endCursor;
-};
diff --git a/src/services/graphql/comments.mutation.ts b/src/services/graphql/comments.mutation.ts
deleted file mode 100644
index f52c7e9..0000000
--- a/src/services/graphql/comments.mutation.ts
+++ /dev/null
@@ -1,30 +0,0 @@
-/**
- * Send comment mutation.
- */
-export const sendCommentMutation = `mutation CreateComment(
-  $author: String!
-  $authorEmail: String!
-  $authorUrl: String!
-  $content: String!
-  $parent: ID = null
-  $commentOn: Int!
-  $clientMutationId: String!
-) {
-  createComment(
-    input: {
-      author: $author
-      authorEmail: $authorEmail
-      authorUrl: $authorUrl
-      content: $content
-      parent: $parent
-      commentOn: $commentOn
-      clientMutationId: $clientMutationId
-    }
-  ) {
-    clientMutationId
-    success
-    comment {
-      approved
-    }
-  }
-}`;
diff --git a/src/services/graphql/comments.query.ts b/src/services/graphql/comments.query.ts
deleted file mode 100644
index 5110db3..0000000
--- a/src/services/graphql/comments.query.ts
+++ /dev/null
@@ -1,32 +0,0 @@
-/**
- * Query the comments data by post id.
- */
-export const commentsQuery = `query CommentsByPostId($contentId: ID!, $first: Int = 10, $after: String = "") {
-  comments(
-    where: {contentId: $contentId}
-    first: $first
-    after: $after
-  ) {
-    edges {
-      cursor
-      node {
-        approved
-        author {
-          node {
-            gravatarUrl
-            name
-            url
-          }
-        }
-        content
-        databaseId
-        date
-        parentDatabaseId
-      }
-    }
-    pageInfo {
-      hasNextPage
-      endCursor
-    }
-  }
-}`;
diff --git a/src/services/graphql/comments.ts b/src/services/graphql/comments.ts
deleted file mode 100644
index 4eaeac7..0000000
--- a/src/services/graphql/comments.ts
+++ /dev/null
@@ -1,177 +0,0 @@
-import {
-  type ContentId,
-  type GraphQLEdgesInput,
-  type RawComment,
-  type RawCommentsPage,
-  type SendCommentInput,
-  type SentComment,
-  type SingleComment,
-} from '../../types';
-import { getAuthorFromRawData } from '../../utils/helpers';
-import { fetchAPI } from './api';
-import { sendCommentMutation } from './comments.mutation';
-import { commentsQuery } from './comments.query';
-
-/**
- * Convert a comment from RawComment type to SingleComment type.
- *
- * @param {RawComment} comment - A raw comment.
- * @returns {SingleComment} A formatted comment.
- */
-export const getCommentFromRawData = (comment: RawComment): SingleComment => {
-  const { author, databaseId, date, parentDatabaseId, ...data } = comment;
-
-  return {
-    id: databaseId,
-    meta: {
-      author: getAuthorFromRawData(author.node, 'comment'),
-      date,
-    },
-    parentId: parentDatabaseId === 0 ? undefined : parentDatabaseId,
-    replies: [],
-    ...data,
-  };
-};
-
-/**
- * Convert an array of RawComment type to an array of SingleComment type.
- *
- * @param {RawComment[]} comments - The raw comments.
- * @returns {SingleComment[]} The formatted comments.
- */
-export const getCommentsFromRawData = (
-  comments: RawComment[]
-): SingleComment[] => {
-  return comments.map((comment) => getCommentFromRawData(comment));
-};
-
-/**
- * Create a comments tree with replies.
- *
- * @param {SingleComment[]} comments - A flatten comments list.
- * @returns {SingleComment[]} An array of comments with replies.
- */
-export const buildCommentsTree = (
-  comments: SingleComment[]
-): SingleComment[] => {
-  type CommentsHashTable = {
-    [key: string]: SingleComment;
-  };
-
-  const hashTable: CommentsHashTable = Object.create(null);
-  const commentsTree: SingleComment[] = [];
-
-  comments.forEach(
-    (comment) => (hashTable[comment.id] = { ...comment, replies: [] })
-  );
-
-  comments.forEach((comment) => {
-    if (!comment.parentId) {
-      commentsTree.push(hashTable[comment.id]);
-    } else {
-      hashTable[comment.parentId].replies.push(hashTable[comment.id]);
-    }
-  });
-
-  return commentsTree;
-};
-
-type FetchCommentsInput = ContentId &
-  Pick<GraphQLEdgesInput, 'after' | 'first'>;
-
-/**
- * Retrieve a raw comments page from GraphQL.
- *
- * @param {FetchCommentsInput} variables - An object of variables.
- * @returns {Promise<RawCommentsPage>} A raw comments page.
- */
-export const fetchRawComments = async (
-  variables: FetchCommentsInput
-): Promise<RawCommentsPage> => {
-  const response = await fetchAPI<RawComment, typeof commentsQuery>({
-    query: commentsQuery,
-    variables,
-  });
-
-  return {
-    comments: response.comments.edges.map((edge) => edge.node),
-    hasNextPage: response.comments.pageInfo.hasNextPage,
-    endCursor: response.comments.pageInfo.endCursor,
-  };
-};
-
-/**
- * Fetch recursively all the comments on a post.
- *
- * @param {FetchCommentsInput} variables - An object of query variables.
- * @param {RawCommentsPage[]} pages - An accumulator to keep track of pages.
- * @returns {Promise<RawCommentsPage[]>} The raw comments pages.
- */
-export const fetchAllRawCommentsPages = async (
-  variables: FetchCommentsInput,
-  pages: RawCommentsPage[] = []
-): Promise<RawCommentsPage[]> => {
-  return fetchRawComments(variables).then((page) => {
-    pages.push(page);
-
-    if (page.hasNextPage) {
-      return fetchAllRawCommentsPages(
-        { ...variables, after: page.endCursor },
-        pages
-      );
-    } else {
-      return pages;
-    }
-  });
-};
-
-/**
- * Method to compare two comments dates and sort them from older to newest.
- *
- * @param {SingleComment} a - A comment.
- * @param {SingleComment} b - Another comment.
- * @returns {number} The difference between dates.
- */
-export const compareCommentsDate = (
-  a: SingleComment,
-  b: SingleComment
-): number => {
-  return +new Date(a.meta.date) - +new Date(b.meta.date);
-};
-
-/**
- * Retrieve all the comments on a post.
- *
- * @param {number} id - A post id.
- * @returns {Promise<SingleComment[]>} The comments list.
- */
-export const getAllComments = async ({
-  contentId,
-}: {
-  contentId: number;
-}): Promise<SingleComment[]> => {
-  const pages = await fetchAllRawCommentsPages({ contentId });
-  const comments = pages
-    .map((page) => getCommentsFromRawData(page.comments))
-    .flat()
-    .sort(compareCommentsDate);
-
-  return buildCommentsTree(comments);
-};
-
-/**
- * Send a comment using GraphQL API.
- *
- * @param {SendCommentVars} data - The comment data.
- * @returns {Promise<SentComment>} The mutation response.
- */
-export const sendComment = async (
-  data: SendCommentInput
-): Promise<SentComment> => {
-  const response = await fetchAPI<SentComment, typeof sendCommentMutation>({
-    query: sendCommentMutation,
-    variables: { ...data },
-  });
-
-  return response.createComment;
-};
diff --git a/src/services/graphql/contact.mutation.ts b/src/services/graphql/contact.mutation.ts
deleted file mode 100644
index b82fc07..0000000
--- a/src/services/graphql/contact.mutation.ts
+++ /dev/null
@@ -1,25 +0,0 @@
-/**
- * Send mail mutation.
- */
-export const sendMailMutation = `mutation SendEmail(
-  $subject: String!
-  $body: String!
-  $replyTo: String!
-  $clientMutationId: String!
-) {
-  sendEmail(
-    input: {
-      clientMutationId: $clientMutationId
-      body: $body
-      replyTo: $replyTo
-      subject: $subject
-    }
-  ) {
-    clientMutationId
-    message
-    sent
-    origin
-    replyTo
-    to
-  }
-}`;
diff --git a/src/services/graphql/contact.ts b/src/services/graphql/contact.ts
deleted file mode 100644
index 3098374..0000000
--- a/src/services/graphql/contact.ts
+++ /dev/null
@@ -1,26 +0,0 @@
-import { SendMailInput } from '../../types';
-import { fetchAPI } from './api';
-import { sendMailMutation } from './contact.mutation';
-
-export type SentEmail = {
-  clientMutationId: string;
-  message: string;
-  origin: string;
-  replyTo: string;
-  sent: boolean;
-};
-
-/**
- * Send an email using GraphQL API.
- *
- * @param {SendMailInput} data - The mail data.
- * @returns {Promise<SentEmail>} The mutation response.
- */
-export const sendMail = async (data: SendMailInput): Promise<SentEmail> => {
-  const response = await fetchAPI<SentEmail, typeof sendMailMutation>({
-    query: sendMailMutation,
-    variables: { ...data },
-  });
-
-  return response.sendEmail;
-};
diff --git a/src/services/graphql/fetchers/comments/fetch-comments.ts b/src/services/graphql/fetchers/comments/fetch-comments.ts
new file mode 100644
index 0000000..85ae6c1
--- /dev/null
+++ b/src/services/graphql/fetchers/comments/fetch-comments.ts
@@ -0,0 +1,65 @@
+import type {
+  GraphQLCommentWhere,
+  GraphQLEdgesInput,
+  GraphQLNodes,
+  Nullable,
+  WPComment,
+} from '../../../../types';
+import { fetchGraphQL, getGraphQLUrl } from '../../../../utils/helpers';
+
+type CommentsListResponse = {
+  comments: Nullable<GraphQLNodes<WPComment>>;
+};
+
+const commentsListQuery = `query CommentsList($first: Int, $contentId: ID, $contentName: String, $status: String) {
+  comments(
+    first: $first
+    where: {contentId: $contentId, contentName: $contentName, order: ASC, orderby: COMMENT_DATE, status: $status}
+  ) {
+    nodes {
+      approved
+      author {
+        node {
+          avatar {
+            height
+            url
+            width
+          }
+          name
+          url
+        }
+      }
+      content
+      databaseId
+      date
+      parentDatabaseId
+      status
+    }
+  }
+}`;
+
+export type FetchCommentsListInput = Pick<GraphQLEdgesInput, 'first'> & {
+  where?: GraphQLCommentWhere;
+};
+
+/**
+ * Retrieve the comments list.
+ *
+ * @param {FetchCommentsListInput} input - The input to retrieve comments.
+ * @returns {Promise<WPComment[]>} An array of comments.
+ */
+export const fetchCommentsList = async ({
+  where,
+  ...vars
+}: FetchCommentsListInput): Promise<WPComment[]> => {
+  const response = await fetchGraphQL<CommentsListResponse>({
+    query: commentsListQuery,
+    url: getGraphQLUrl(),
+    variables: { ...vars, ...where },
+  });
+
+  if (!response.comments)
+    return Promise.reject(new Error('No comments found.'));
+
+  return response.comments.nodes;
+};
diff --git a/src/services/graphql/fetchers/comments/index.ts b/src/services/graphql/fetchers/comments/index.ts
new file mode 100644
index 0000000..6a15970
--- /dev/null
+++ b/src/services/graphql/fetchers/comments/index.ts
@@ -0,0 +1 @@
+export * from './fetch-comments';
diff --git a/src/services/graphql/fetchers/index.ts b/src/services/graphql/fetchers/index.ts
new file mode 100644
index 0000000..f45b1c0
--- /dev/null
+++ b/src/services/graphql/fetchers/index.ts
@@ -0,0 +1,4 @@
+export * from './comments';
+export * from './posts';
+export * from './thematics';
+export * from './topics';
diff --git a/src/services/graphql/fetchers/posts/fetch-all-posts-slugs.ts b/src/services/graphql/fetchers/posts/fetch-all-posts-slugs.ts
new file mode 100644
index 0000000..28f2bbf
--- /dev/null
+++ b/src/services/graphql/fetchers/posts/fetch-all-posts-slugs.ts
@@ -0,0 +1,34 @@
+import type { GraphQLNodes, Nullable, SlugNode } from '../../../../types';
+import { fetchGraphQL, getGraphQLUrl } from '../../../../utils/helpers';
+import { fetchPostsCount } from './fetch-posts-count';
+
+type PostsSlugsResponse = {
+  posts: Nullable<GraphQLNodes<SlugNode>>;
+};
+
+const postsSlugsQuery = `query PostsSlugs($first: Int) {
+  posts(first: $first) {
+    nodes {
+      slug
+    }
+  }
+}`;
+
+/**
+ * Retrieve the WordPress posts slugs.
+ *
+ * @returns {Promise<string[]>} The posts slugs.
+ */
+export const fetchAllPostsSlugs = async (): Promise<string[]> => {
+  const postsCount = await fetchPostsCount();
+  const response = await fetchGraphQL<PostsSlugsResponse>({
+    query: postsSlugsQuery,
+    url: getGraphQLUrl(),
+    variables: { first: postsCount },
+  });
+
+  if (!response.posts)
+    return Promise.reject(new Error('Unable to find the posts slugs.'));
+
+  return response.posts.nodes.map((node) => node.slug);
+};
diff --git a/src/services/graphql/fetchers/posts/fetch-last-post-cursor.ts b/src/services/graphql/fetchers/posts/fetch-last-post-cursor.ts
new file mode 100644
index 0000000..d5ed174
--- /dev/null
+++ b/src/services/graphql/fetchers/posts/fetch-last-post-cursor.ts
@@ -0,0 +1,37 @@
+import type { GraphQLPageInfo, Nullable } from '../../../../types';
+import { fetchGraphQL, getGraphQLUrl } from '../../../../utils/helpers';
+
+type LastPostCursorResponse = {
+  posts: Nullable<{
+    pageInfo: Pick<GraphQLPageInfo, 'endCursor'>;
+  }>;
+};
+
+const lastPostCursorQuery = `query LastPostCursor($first: Int) {
+  posts(first: $first) {
+    pageInfo {
+      endCursor
+    }
+  }
+}`;
+
+/**
+ * Retrieve the cursor of the last post for a given number of posts.
+ *
+ * @param {number} count - The number of posts to fetch.
+ * @returns {Promise<string>} The cursor of the last post.
+ */
+export const fetchLastPostCursor = async (count: number): Promise<string> => {
+  const response = await fetchGraphQL<LastPostCursorResponse>({
+    url: getGraphQLUrl(),
+    query: lastPostCursorQuery,
+    variables: { first: count },
+  });
+
+  if (!response.posts?.pageInfo.endCursor)
+    return Promise.reject(
+      new Error('Unable to find the cursor of the last post.')
+    );
+
+  return response.posts.pageInfo.endCursor;
+};
diff --git a/src/services/graphql/fetchers/posts/fetch-post.ts b/src/services/graphql/fetchers/posts/fetch-post.ts
new file mode 100644
index 0000000..53c6bc3
--- /dev/null
+++ b/src/services/graphql/fetchers/posts/fetch-post.ts
@@ -0,0 +1,92 @@
+import type { Nullable, WPPost } from '../../../../types';
+import { fetchGraphQL, getGraphQLUrl } from '../../../../utils/helpers';
+
+type PostResponse = {
+  post: Nullable<WPPost>;
+};
+
+const postQuery = `query Post($slug: ID!) {
+  post(id: $slug, idType: SLUG) {
+    acfPosts {
+      postsInThematic {
+        ... on Thematic {
+          databaseId
+          slug
+          title
+        }
+      }
+      postsInTopic {
+        ... on Topic {
+          databaseId
+          featuredImage {
+            node {
+              altText
+              mediaDetails {
+                height
+                width
+              }
+              sourceUrl
+              title
+            }
+          }
+          slug
+          title
+        }
+      }
+    }
+    author {
+      node {
+        name
+      }
+    }
+    commentCount
+    contentParts {
+      afterMore
+      beforeMore
+    }
+    databaseId
+    date
+    featuredImage {
+      node {
+        altText
+        mediaDetails {
+          height
+          width
+        }
+        sourceUrl
+        title
+      }
+    }
+    info {
+      wordsCount
+    }
+    modified
+    seo {
+      metaDesc
+      title
+    }
+    slug
+    title
+  }
+}`;
+
+/**
+ * Retrieve a WordPress post by slug.
+ *
+ * @param {string} slug - The post slug.
+ * @returns {Promise<WPPost>} The requested post.
+ */
+export const fetchPost = async (slug: string): Promise<WPPost> => {
+  const response = await fetchGraphQL<PostResponse>({
+    query: postQuery,
+    url: getGraphQLUrl(),
+    variables: { slug },
+  });
+
+  if (!response.post)
+    return Promise.reject(
+      new Error(`No post found for the following slug ${slug}.`)
+    );
+
+  return response.post;
+};
diff --git a/src/services/graphql/fetchers/posts/fetch-posts-count.ts b/src/services/graphql/fetchers/posts/fetch-posts-count.ts
new file mode 100644
index 0000000..a72af52
--- /dev/null
+++ b/src/services/graphql/fetchers/posts/fetch-posts-count.ts
@@ -0,0 +1,43 @@
+import type {
+  GraphQLPageInfo,
+  GraphQLPostWhere,
+  Nullable,
+} from '../../../../types';
+import { fetchGraphQL, getGraphQLUrl } from '../../../../utils/helpers';
+
+type PostsCountResponse = {
+  posts: Nullable<{
+    pageInfo: Pick<GraphQLPageInfo, 'total'>;
+  }>;
+};
+
+const postsCountQuery = `query PostsCount($authorName: String, $search: String, $title: String) {
+  posts(where: {authorName: $authorName, search: $search, title: $title}) {
+    pageInfo {
+      total
+    }
+  }
+}`;
+
+/**
+ * Retrieve the total of WordPress posts.
+ *
+ * @param {GraphQLPostWhere} [input] - The input to filter the posts.
+ * @returns {Promise<number>} The total number of posts.
+ */
+export const fetchPostsCount = async (
+  input?: GraphQLPostWhere
+): Promise<number> => {
+  const response = await fetchGraphQL<PostsCountResponse>({
+    query: postsCountQuery,
+    url: getGraphQLUrl(),
+    variables: { ...input },
+  });
+
+  if (!response.posts)
+    return Promise.reject(
+      new Error('Unable to find the total number of posts.')
+    );
+
+  return response.posts.pageInfo.total;
+};
diff --git a/src/services/graphql/fetchers/posts/fetch-posts-list.ts b/src/services/graphql/fetchers/posts/fetch-posts-list.ts
new file mode 100644
index 0000000..452892b
--- /dev/null
+++ b/src/services/graphql/fetchers/posts/fetch-posts-list.ts
@@ -0,0 +1,97 @@
+import type {
+  GraphQLConnection,
+  GraphQLEdgesInput,
+  GraphQLPostOrderBy,
+  GraphQLPostWhere,
+  Nullable,
+  WPPostPreview,
+} from '../../../../types';
+import { fetchGraphQL, getGraphQLUrl } from '../../../../utils/helpers';
+
+type PostsListResponse = {
+  posts: Nullable<GraphQLConnection<WPPostPreview>>;
+};
+
+const postsListQuery = `query PostsList($after: String, $before: String, $first: Int, $last: Int, $authorName: String, $orderby: [PostObjectsConnectionOrderbyInput], $search: String, $title: String) {
+  posts(
+    after: $after
+    before: $before
+    first: $first
+    last: $last
+    where: {authorName: $authorName, orderby: $orderby, search: $search, title: $title}
+  ) {
+    edges {
+      cursor
+      node {
+        acfPosts {
+          postsInThematic {
+            ... on Thematic {
+              databaseId
+              slug
+              title
+            }
+          }
+        }
+        commentCount
+        contentParts {
+          beforeMore
+        }
+        databaseId
+        date
+        featuredImage {
+          node {
+            altText
+            mediaDetails {
+              height
+              width
+            }
+            sourceUrl
+            title
+          }
+        }
+        info {
+          wordsCount
+        }
+        modified
+        slug
+        title
+      }
+    }
+    pageInfo {
+      endCursor
+      hasNextPage
+      total
+    }
+  }
+}`;
+
+export type FetchPostsListInput = GraphQLEdgesInput & {
+  orderBy?: GraphQLPostOrderBy;
+  where?: GraphQLPostWhere;
+};
+
+/**
+ * Retrieve a paginated list of WordPress posts.
+ *
+ * @param {FetchPostsListInput} input - The input to retrieve posts.
+ * @returns {Promise<GraphQLConnection<WPPostPreview>>} The paginated posts.
+ */
+export const fetchPostsList = async ({
+  orderBy,
+  where,
+  ...vars
+}: FetchPostsListInput): Promise<GraphQLConnection<WPPostPreview>> => {
+  const response = await fetchGraphQL<PostsListResponse>({
+    query: postsListQuery,
+    url: getGraphQLUrl(),
+    variables: {
+      ...vars,
+      ...where,
+      orderBy: orderBy ? [orderBy] : undefined,
+    },
+  });
+
+  if (!response.posts) return Promise.reject(new Error('No posts found.'));
+
+  return response.posts;
+};
diff --git a/src/services/graphql/fetchers/posts/fetch-recent-posts.ts b/src/services/graphql/fetchers/posts/fetch-recent-posts.ts
new file mode 100644
index 0000000..12785d6
--- /dev/null
+++ b/src/services/graphql/fetchers/posts/fetch-recent-posts.ts
@@ -0,0 +1,76 @@
+import type {
+  GraphQLConnection,
+  GraphQLEdgesInput,
+  GraphQLPostWhere,
+  Nullable,
+  RecentWPPost,
+} from '../../../../types';
+import { fetchGraphQL, getGraphQLUrl } from '../../../../utils/helpers';
+
+type RecentPostsResponse = {
+  posts: Nullable<GraphQLConnection<RecentWPPost>>;
+};
+
+const recentPostsQuery = `query RecentPosts($after: String, $before: String, $first: Int, $last: Int, $authorName: String, $search: String, $title: String) {
+  posts(
+    after: $after
+    before: $before
+    first: $first
+    last: $last
+    where: {authorName: $authorName, search: $search, title: $title, orderby: {field: DATE, order: DESC}}
+  ) {
+    edges {
+      cursor
+      node {
+        databaseId
+        date
+        featuredImage {
+          node {
+            altText
+            mediaDetails {
+              height
+              width
+            }
+            sourceUrl
+            title
+          }
+        }
+        slug
+        title
+      }
+    }
+    pageInfo {
+      endCursor
+      hasNextPage
+      hasPreviousPage
+      startCursor
+      total
+    }
+  }
+}`;
+
+export type FetchRecentPostsInput = GraphQLEdgesInput & {
+  where?: GraphQLPostWhere;
+};
+
+/**
+ * Retrieve a paginated list of recent WordPress posts.
+ *
+ * @param {FetchRecentPostsInput} input - The input to retrieve recent posts.
+ * @returns {Promise<GraphQLConnection<RecentWPPost>>} The recent posts.
+ */
+export const fetchRecentPosts = async ({
+  where,
+  ...vars
+}: FetchRecentPostsInput): Promise<GraphQLConnection<RecentWPPost>> => {
+  const response = await fetchGraphQL<RecentPostsResponse>({
+    query: recentPostsQuery,
+    url: getGraphQLUrl(),
+    variables: { ...vars, ...where },
+  });
+
+  if (!response.posts)
+    return Promise.reject(new Error('No recent posts found.'));
+
+  return response.posts;
+};
diff --git a/src/services/graphql/fetchers/posts/index.ts b/src/services/graphql/fetchers/posts/index.ts
new file mode 100644
index 0000000..fd725cd
--- /dev/null
+++ b/src/services/graphql/fetchers/posts/index.ts
@@ -0,0 +1,6 @@
+export * from './fetch-all-posts-slugs';
+export * from './fetch-last-post-cursor';
+export * from './fetch-post';
+export * from './fetch-posts-count';
+export * from './fetch-posts-list';
+export * from './fetch-recent-posts';
diff --git a/src/services/graphql/fetchers/thematics/fetch-all-thematics-slugs.ts b/src/services/graphql/fetchers/thematics/fetch-all-thematics-slugs.ts
new file mode 100644
index 0000000..739c009
--- /dev/null
+++ b/src/services/graphql/fetchers/thematics/fetch-all-thematics-slugs.ts
@@ -0,0 +1,34 @@
+import type { GraphQLNodes, Nullable, SlugNode } from '../../../../types';
+import { fetchGraphQL, getGraphQLUrl } from '../../../../utils/helpers';
+import { fetchThematicsCount } from './fetch-thematics-count';
+
+type ThematicsSlugsResponse = {
+  thematics: Nullable<GraphQLNodes<SlugNode>>;
+};
+
+const thematicsSlugsQuery = `query ThematicsSlugs($first: Int) {
+  thematics(first: $first) {
+    nodes {
+      slug
+    }
+  }
+}`;
+
+/**
+ * Retrieve the WordPress thematics slugs.
+ *
+ * @returns {Promise<string[]>} The thematics slugs.
+ */
+export const fetchAllThematicsSlugs = async (): Promise<string[]> => {
+  const thematicsCount = await fetchThematicsCount();
+  const response = await fetchGraphQL<ThematicsSlugsResponse>({
+    query: thematicsSlugsQuery,
+    url: getGraphQLUrl(),
+    variables: { first: thematicsCount },
+  });
+
+  if (!response.thematics)
+    return Promise.reject(new Error('Unable to find the thematics slugs.'));
+
+  return response.thematics.nodes.map((node) => node.slug);
+};
diff --git a/src/services/graphql/fetchers/thematics/fetch-thematic.ts b/src/services/graphql/fetchers/thematics/fetch-thematic.ts
new file mode 100644
index 0000000..a9958bc
--- /dev/null
+++ b/src/services/graphql/fetchers/thematics/fetch-thematic.ts
@@ -0,0 +1,96 @@
+import type { Nullable, WPThematic } from '../../../../types';
+import { fetchGraphQL, getGraphQLUrl } from '../../../../utils/helpers';
+
+type ThematicResponse = {
+  thematic: Nullable<WPThematic>;
+};
+
+const thematicQuery = `query Thematic($slug: ID!) {
+  thematic(id: $slug, idType: SLUG) {
+    acfThematics {
+      postsInThematic {
+        ... on Post {
+          acfPosts {
+            postsInTopic {
+              ... on Topic {
+                databaseId
+                slug
+                title
+              }
+            }
+          }
+          author {
+            node {
+              name
+            }
+          }
+          commentCount
+          contentParts {
+            beforeMore
+          }
+          databaseId
+          date
+          featuredImage {
+            node {
+              altText
+              mediaDetails {
+                height
+                width
+              }
+              sourceUrl
+              title
+            }
+          }
+          info {
+            wordsCount
+          }
+          modified
+          slug
+          title
+        }
+      }
+    }
+    contentParts {
+      afterMore
+      beforeMore
+    }
+    featuredImage {
+      node {
+        altText
+        mediaDetails {
+          height
+          width
+        }
+        sourceUrl
+        title
+      }
+    }
+    seo {
+      metaDesc
+      title
+    }
+    slug
+    title
+  }
+}`;
+
+/**
+ * Retrieve a WordPress thematic by slug.
+ *
+ * @param {string} slug - The thematic slug.
+ * @returns {Promise<WPThematic>} The requested thematic.
+ */
+export const fetchThematic = async (slug: string): Promise<WPThematic> => {
+  const response = await fetchGraphQL<ThematicResponse>({
+    query: thematicQuery,
+    url: getGraphQLUrl(),
+    variables: { slug },
+  });
+
+  if (!response.thematic)
+    return Promise.reject(
+      new Error(`No thematic found for the following slug ${slug}.`)
+    );
+
+  return response.thematic;
+};
diff --git a/src/services/graphql/fetchers/thematics/fetch-thematics-count.ts b/src/services/graphql/fetchers/thematics/fetch-thematics-count.ts
new file mode 100644
index 0000000..29a3b17
--- /dev/null
+++ b/src/services/graphql/fetchers/thematics/fetch-thematics-count.ts
@@ -0,0 +1,43 @@
+import type {
+  GraphQLPageInfo,
+  GraphQLTaxonomyWhere,
+  Nullable,
+} from '../../../../types';
+import { fetchGraphQL, getGraphQLUrl } from '../../../../utils/helpers';
+
+type ThematicsCountResponse = {
+  thematics: Nullable<{
+    pageInfo: Pick<GraphQLPageInfo, 'total'>;
+  }>;
+};
+
+const thematicsCountQuery = `query ThematicsCount($search: String, $title: String) {
+  thematics(where: {search: $search, title: $title}) {
+    pageInfo {
+      total
+    }
+  }
+}`;
+
+/**
+ * Retrieve the total of WordPress thematics.
+ *
+ * @param {GraphQLTaxonomyWhere} [input] - The input to filter the thematics.
+ * @returns {Promise<number>} The total number of thematics.
+ */
+export const fetchThematicsCount = async (
+  input?: GraphQLTaxonomyWhere
+): Promise<number> => {
+  const response = await fetchGraphQL<ThematicsCountResponse>({
+    query: thematicsCountQuery,
+    url: getGraphQLUrl(),
+    variables: { ...input },
+  });
+
+  if (!response.thematics)
+    return Promise.reject(
+      new Error('Unable to find the total number of thematics.')
+    );
+
+  return response.thematics.pageInfo.total;
+};
diff --git a/src/services/graphql/fetchers/thematics/fetch-thematics-list.ts b/src/services/graphql/fetchers/thematics/fetch-thematics-list.ts
new file mode 100644
index 0000000..f4d22c6
--- /dev/null
+++ b/src/services/graphql/fetchers/thematics/fetch-thematics-list.ts
@@ -0,0 +1,78 @@
+import type {
+  GraphQLConnection,
+  GraphQLEdgesInput,
+  GraphQLTaxonomyOrderBy,
+  GraphQLTaxonomyWhere,
+  Nullable,
+  WPThematicPreview,
+} from '../../../../types';
+import { fetchGraphQL, getGraphQLUrl } from '../../../../utils/helpers';
+
+type ThematicsListResponse = {
+  thematics: Nullable<GraphQLConnection<WPThematicPreview>>;
+};
+
+const thematicsListQuery = `query ThematicsList($after: String, $before: String, $first: Int, $last: Int, $orderby: [PostObjectsConnectionOrderbyInput], $search: String, $title: String) {
+  thematics(
+    after: $after
+    before: $before
+    first: $first
+    last: $last
+    where: {orderby: $orderby, search: $search, title: $title}
+  ) {
+    edges {
+      cursor
+      node {
+        contentParts {
+          beforeMore
+        }
+        databaseId
+        featuredImage {
+          node {
+            altText
+            mediaDetails {
+              height
+              width
+            }
+            sourceUrl
+            title
+          }
+        }
+        slug
+        title
+      }
+    }
+  }
+}`;
+
+export type FetchThematicsListInput = GraphQLEdgesInput & {
+  orderBy?: GraphQLTaxonomyOrderBy;
+  where?: GraphQLTaxonomyWhere;
+};
+
+/**
+ * Retrieve a paginated list of WordPress thematics.
+ *
+ * @param {FetchThematicsListInput} input - The input to retrieve thematics.
+ * @returns {Promise<GraphQLConnection<WPThematicPreview>>} The paginated thematics.
+ */
+export const fetchThematicsList = async ({
+  orderBy,
+  where,
+  ...vars
+}: FetchThematicsListInput): Promise<GraphQLConnection<WPThematicPreview>> => {
+  const response = await fetchGraphQL<ThematicsListResponse>({
+    query: thematicsListQuery,
+    url: getGraphQLUrl(),
+    variables: {
+      ...vars,
+      ...where,
+      orderBy: orderBy ? [orderBy] : undefined,
+    },
+  });
+
+  if (!response.thematics)
+    return Promise.reject(new Error('No thematics found.'));
+
+  return response.thematics;
+};
diff --git a/src/services/graphql/fetchers/thematics/index.ts b/src/services/graphql/fetchers/thematics/index.ts
new file mode 100644
index 0000000..c002793
--- /dev/null
+++ b/src/services/graphql/fetchers/thematics/index.ts
@@ -0,0 +1,4 @@
+export * from './fetch-all-thematics-slugs';
+export * from './fetch-thematic';
+export * from './fetch-thematics-count';
+export * from './fetch-thematics-list';
diff --git a/src/services/graphql/fetchers/topics/fetch-all-topics-slugs.ts b/src/services/graphql/fetchers/topics/fetch-all-topics-slugs.ts
new file mode 100644
index 0000000..eab4a7c
--- /dev/null
+++ b/src/services/graphql/fetchers/topics/fetch-all-topics-slugs.ts
@@ -0,0 +1,34 @@
+import type { GraphQLNodes, Nullable, SlugNode } from '../../../../types';
+import { fetchGraphQL, getGraphQLUrl } from '../../../../utils/helpers';
+import { fetchTopicsCount } from './fetch-topics-count';
+
+type TopicsSlugsResponse = {
+  topics: Nullable<GraphQLNodes<SlugNode>>;
+};
+
+const topicsSlugsQuery = `query TopicsSlugs($first: Int) {
+  topics(first: $first) {
+    nodes {
+      slug
+    }
+  }
+}`;
+
+/**
+ * Retrieve the WordPress topics slugs.
+ *
+ * @returns {Promise<string[]>} The topics slugs.
+ */
+export const fetchAllTopicsSlugs = async (): Promise<string[]> => {
+  const topicsCount = await fetchTopicsCount();
+  const response = await fetchGraphQL<TopicsSlugsResponse>({
+    query: topicsSlugsQuery,
+    url: getGraphQLUrl(),
+    variables: { first: topicsCount },
+  });
+
+  if (!response.topics)
+    return Promise.reject(new Error('Unable to find the topics slugs.'));
+
+  return response.topics.nodes.map((node) => node.slug);
+};
diff --git a/src/services/graphql/fetchers/topics/fetch-topic.ts b/src/services/graphql/fetchers/topics/fetch-topic.ts
new file mode 100644
index 0000000..efc1d9e
--- /dev/null
+++ b/src/services/graphql/fetchers/topics/fetch-topic.ts
@@ -0,0 +1,97 @@
+import type { Nullable, WPTopic } from '../../../../types';
+import { fetchGraphQL, getGraphQLUrl } from '../../../../utils/helpers';
+
+type TopicResponse = {
+  topic: Nullable<WPTopic>;
+};
+
+const topicQuery = `query Topic($slug: ID!) {
+  topic(id: $slug, idType: SLUG) {
+    acfTopics {
+      officialWebsite
+      postsInTopic {
+        ... on Post {
+          acfPosts {
+            postsInThematic {
+              ... on Thematic {
+                databaseId
+                slug
+                title
+              }
+            }
+          }
+          author {
+            node {
+              name
+            }
+          }
+          commentCount
+          contentParts {
+            beforeMore
+          }
+          databaseId
+          date
+          featuredImage {
+            node {
+              altText
+              mediaDetails {
+                height
+                width
+              }
+              sourceUrl
+              title
+            }
+          }
+          info {
+            wordsCount
+          }
+          modified
+          slug
+          title
+        }
+      }
+    }
+    contentParts {
+      afterMore
+      beforeMore
+    }
+    featuredImage {
+      node {
+        altText
+        mediaDetails {
+          height
+          width
+        }
+        sourceUrl
+        title
+      }
+    }
+    seo {
+      metaDesc
+      title
+    }
+    slug
+    title
+  }
+}`;
+
+/**
+ * Retrieve a WordPress topic by slug.
+ *
+ * @param {string} slug - The topic slug.
+ * @returns {Promise<WPTopic>} The requested topic.
+ */
+export const fetchTopic = async (slug: string): Promise<WPTopic> => {
+  const response = await fetchGraphQL<TopicResponse>({
+    query: topicQuery,
+    url: getGraphQLUrl(),
+    variables: { slug },
+  });
+
+  if (!response.topic)
+    return Promise.reject(
+      new Error(`No topic found for the following slug ${slug}.`)
+    );
+
+  return response.topic;
+};
diff --git a/src/services/graphql/fetchers/topics/fetch-topics-count.ts b/src/services/graphql/fetchers/topics/fetch-topics-count.ts
new file mode 100644
index 0000000..868b01e
--- /dev/null
+++ b/src/services/graphql/fetchers/topics/fetch-topics-count.ts
@@ -0,0 +1,43 @@
+import type {
+  GraphQLPageInfo,
+  GraphQLTaxonomyWhere,
+  Nullable,
+} from '../../../../types';
+import { fetchGraphQL, getGraphQLUrl } from '../../../../utils/helpers';
+
+type TopicsCountResponse = {
+  topics: Nullable<{
+    pageInfo: Pick<GraphQLPageInfo, 'total'>;
+  }>;
+};
+
+const topicsCountQuery = `query TopicsCount($search: String, $title: String) {
+  topics(where: {search: $search, title: $title}) {
+    pageInfo {
+      total
+    }
+  }
+}`;
+
+/**
+ * Retrieve the total of WordPress topics.
+ *
+ * @param {GraphQLTaxonomyWhere} [input] - The input to filter the topics.
+ * @returns {Promise<number>} The total number of topics.
+ */
+export const fetchTopicsCount = async (
+  input?: GraphQLTaxonomyWhere
+): Promise<number> => {
+  const response = await fetchGraphQL<TopicsCountResponse>({
+    query: topicsCountQuery,
+    url: getGraphQLUrl(),
+    variables: { ...input },
+  });
+
+  if (!response.topics)
+    return Promise.reject(
+      new Error('Unable to find the total number of topics.')
+    );
+
+  return response.topics.pageInfo.total;
+};
diff --git a/src/services/graphql/fetchers/topics/fetch-topics-list.ts b/src/services/graphql/fetchers/topics/fetch-topics-list.ts
new file mode 100644
index 0000000..1bc2e38
--- /dev/null
+++ b/src/services/graphql/fetchers/topics/fetch-topics-list.ts
@@ -0,0 +1,84 @@
+import type {
+  GraphQLConnection,
+  GraphQLEdgesInput,
+  GraphQLTaxonomyOrderBy,
+  GraphQLTaxonomyWhere,
+  Nullable,
+  WPTopicPreview,
+} from '../../../../types';
+import { fetchGraphQL, getGraphQLUrl } from '../../../../utils/helpers';
+
+type TopicsListResponse = {
+  topics: Nullable<GraphQLConnection<WPTopicPreview>>;
+};
+
+const topicsListQuery = `query TopicsList($after: String, $before: String, $first: Int, $last: Int, $orderby: [PostObjectsConnectionOrderbyInput], $search: String, $title: String) {
+  topics(
+    after: $after
+    before: $before
+    first: $first
+    last: $last
+    where: {orderby: $orderby, search: $search, title: $title}
+  ) {
+    edges {
+      cursor
+      node {
+        contentParts {
+          beforeMore
+        }
+        databaseId
+        featuredImage {
+          node {
+            altText
+            mediaDetails {
+              height
+              width
+            }
+            slug
+            title
+          }
+        }
+        slug
+        title
+      }
+    }
+    pageInfo {
+      endCursor
+      hasNextPage
+      hasPreviousPage
+      startCursor
+      total
+    }
+  }
+}`;
+
+export type FetchTopicsListInput = GraphQLEdgesInput & {
+  orderBy?: GraphQLTaxonomyOrderBy;
+  where?: GraphQLTaxonomyWhere;
+};
+
+/**
+ * Retrieve a paginated list of WordPress topics.
+ *
+ * @param {FetchTopicsListInput} input - The input to retrieve topics.
+ * @returns {Promise<GraphQLConnection<WPTopicPreview>>} The paginated topics.
+ */
+export const fetchTopicsList = async ({
+  orderBy,
+  where,
+  ...vars
+}: FetchTopicsListInput): Promise<GraphQLConnection<WPTopicPreview>> => {
+  const response = await fetchGraphQL<TopicsListResponse>({
+    query: topicsListQuery,
+    url: getGraphQLUrl(),
+    variables: {
+      ...vars,
+      ...where,
+      orderBy: orderBy ? [orderBy] : undefined,
+    },
+  });
+
+  if (!response.topics) return Promise.reject(new Error('No topics found.'));
+
+  return response.topics;
+};
diff --git a/src/services/graphql/fetchers/topics/index.ts b/src/services/graphql/fetchers/topics/index.ts
new file mode 100644
index 0000000..e381883
--- /dev/null
+++ b/src/services/graphql/fetchers/topics/index.ts
@@ -0,0 +1,4 @@
+export * from './fetch-all-topics-slugs';
+export * from './fetch-topic';
+export * from './fetch-topics-count';
+export * from './fetch-topics-list';
diff --git a/src/services/graphql/helpers/build-comments-tree.test.ts b/src/services/graphql/helpers/build-comments-tree.test.ts
new file mode 100644
index 0000000..cd9fa40
--- /dev/null
+++ b/src/services/graphql/helpers/build-comments-tree.test.ts
@@ -0,0 +1,67 @@
+import { describe, expect, it } from '@jest/globals';
+import type { SingleComment } from '../../../types';
+import { buildCommentsTree } from './build-comments-tree';
+
+describe('build-comments-tree', () => {
+  it('transforms a flat comments array to a comments tree', () => {
+    const firstComment = {
+      content: 'Non non provident mollitia a.',
+      id: 1,
+      isApproved: true,
+      meta: { author: { name: 'Emma_Muller' }, date: '2022-11-02' },
+      replies: [],
+    } satisfies SingleComment;
+    const firstCommentReplies = [
+      {
+        content: 'Et omnis voluptatem est atque.',
+        id: 3,
+        isApproved: true,
+        meta: { author: { name: 'Patrick.Goodwin44' }, date: '2022-11-05' },
+        replies: [],
+        parentId: 1,
+      },
+    ] satisfies SingleComment[];
+    const secondComment = {
+      content: 'Vero iure architecto modi iusto qui.',
+      id: 2,
+      isApproved: true,
+      meta: { author: { name: 'Dominique13' }, date: '2022-11-04' },
+      replies: [],
+    } satisfies SingleComment;
+    const secondCommentReplies = [
+      {
+        content: 'Qui quaerat quas quia praesentium quasi.',
+        id: 4,
+        isApproved: true,
+        meta: { author: { name: 'Patrick.Goodwin44' }, date: '2022-11-05' },
+        replies: [],
+        parentId: 2,
+      },
+      {
+        content: 'Ut officia aliquid harum voluptas molestiae quo.',
+        id: 5,
+        isApproved: true,
+        meta: { author: { name: 'Ariel.Braun6' }, date: '2022-11-06' },
+        replies: [],
+        parentId: 2,
+      },
+    ] satisfies SingleComment[];
+    const comments: SingleComment[] = [
+      firstComment,
+      secondComment,
+      ...firstCommentReplies,
+      ...secondCommentReplies,
+    ];
+    const result = buildCommentsTree(comments);
+
+    expect(result).toHaveLength(2);
+    expect(result[0]).toStrictEqual({
+      ...firstComment,
+      replies: firstCommentReplies,
+    });
+    expect(result[1]).toStrictEqual({
+      ...secondComment,
+      replies: secondCommentReplies,
+    });
+  });
+});
diff --git a/src/services/graphql/helpers/build-comments-tree.ts b/src/services/graphql/helpers/build-comments-tree.ts
new file mode 100644
index 0000000..1534cfe
--- /dev/null
+++ b/src/services/graphql/helpers/build-comments-tree.ts
@@ -0,0 +1,30 @@
+import type { SingleComment } from '../../../types';
+
+/**
+ * Create a comments tree with replies.
+ *
+ * @param {SingleComment[]} comments - A flatten comments list.
+ * @returns {SingleComment[]} An array of comments with replies.
+ */
+export const buildCommentsTree = (
+  comments: SingleComment[]
+): SingleComment[] => {
+  type CommentsHashTable = Record<string, SingleComment>;
+
+  const hashTable: CommentsHashTable = Object.create(null);
+  const commentsTree: SingleComment[] = [];
+
+  comments.forEach((comment) => {
+    hashTable[comment.id] = { ...comment, replies: [] };
+  });
+
+  comments.forEach((comment) => {
+    if (comment.parentId) {
+      hashTable[comment.parentId].replies.push(hashTable[comment.id]);
+    } else {
+      commentsTree.push(hashTable[comment.id]);
+    }
+  });
+
+  return commentsTree;
+};
diff --git a/src/services/graphql/helpers/convert-post-preview-to-article-preview.test.ts b/src/services/graphql/helpers/convert-post-preview-to-article-preview.test.ts
new file mode 100644
index 0000000..c13684f
--- /dev/null
+++ b/src/services/graphql/helpers/convert-post-preview-to-article-preview.test.ts
@@ -0,0 +1,130 @@
+import { describe, expect, it } from '@jest/globals';
+import type { WPPostPreview, WPThematicPreview } from '../../../types';
+import { convertPostPreviewToArticlePreview } from './convert-post-preview-to-article-preview';
+import { convertTaxonomyToPageLink } from './convert-taxonomy-to-page-link';
+import { convertWPImgToImg } from './convert-wp-image-to-img';
+
+describe('convert-post-preview-to-article-preview', () => {
+  /* eslint-disable max-statements */
+  it('converts a RecentWPPost object to a RecentArticle object', () => {
+    const post: WPPostPreview = {
+      acfPosts: null,
+      commentCount: 6,
+      contentParts: {
+        beforeMore:
+          'Et quos fuga molestias. Voluptatum nobis mollitia eaque dolorem sunt. Dolores dignissimos consequuntur mollitia. Enim molestias quibusdam sequi. Dolore ut quo. Libero iure non vel reprehenderit.',
+      },
+      databaseId: 5,
+      date: '2021-04-28',
+      featuredImage: null,
+      info: {
+        wordsCount: 450,
+      },
+      modified: '2021-04-29',
+      slug: '/the-post-slug',
+      title: 'et tempore sint',
+    };
+    const result = convertPostPreviewToArticlePreview(post);
+
+    expect(result.id).toBe(post.databaseId);
+    expect(result.intro).toBe(post.contentParts.beforeMore);
+    expect(result.meta.commentsCount).toBe(post.commentCount);
+    expect(result.meta.cover).toBeUndefined();
+    expect(result.meta.dates.publication).toBe(post.date);
+    expect(result.meta.dates.update).toBe(post.modified);
+    expect(result.meta.thematics).toBeUndefined();
+    expect(result.meta.wordsCount).toBe(post.info.wordsCount);
+    expect(result.slug).toBe(post.slug);
+    expect(result.title).toBe(post.title);
+  });
+  /* eslint-enable max-statements */
+
+  it('can return 0 as comment count if not defined', () => {
+    const post: WPPostPreview = {
+      acfPosts: null,
+      commentCount: null,
+      contentParts: {
+        beforeMore:
+          'Et quos fuga molestias. Voluptatum nobis mollitia eaque dolorem sunt. Dolores dignissimos consequuntur mollitia. Enim molestias quibusdam sequi. Dolore ut quo. Libero iure non vel reprehenderit.',
+      },
+      databaseId: 5,
+      date: '2021-04-28',
+      featuredImage: null,
+      info: {
+        wordsCount: 450,
+      },
+      modified: '2021-04-29',
+      slug: '/the-post-slug',
+      title: 'et tempore sint',
+    };
+    const result = convertPostPreviewToArticlePreview(post);
+
+    expect(result.meta.commentsCount).toBe(0);
+  });
+
+  it('can convert the cover', () => {
+    const post = {
+      acfPosts: null,
+      commentCount: null,
+      contentParts: {
+        beforeMore:
+          'Et quos fuga molestias. Voluptatum nobis mollitia eaque dolorem sunt. Dolores dignissimos consequuntur mollitia. Enim molestias quibusdam sequi. Dolore ut quo. Libero iure non vel reprehenderit.',
+      },
+      databaseId: 5,
+      date: '2021-04-28',
+      featuredImage: {
+        node: {
+          altText: 'molestiae praesentium animi',
+          mediaDetails: {
+            height: 480,
+            width: 640,
+          },
+          sourceUrl: 'https://picsum.photos/640/480',
+          title: 'ullam deserunt perspiciatis',
+        },
+      },
+      info: {
+        wordsCount: 450,
+      },
+      modified: '2021-04-29',
+      slug: '/the-post-slug',
+      title: 'et tempore sint',
+    } satisfies WPPostPreview;
+    const result = convertPostPreviewToArticlePreview(post);
+
+    expect(result.meta.cover).toStrictEqual(
+      convertWPImgToImg(post.featuredImage.node)
+    );
+  });
+
+  it('can convert the thematics', () => {
+    const thematics: WPThematicPreview[] = [
+      { databaseId: 2, slug: '/thematic1', title: 'aut quis vel' },
+      { databaseId: 8, slug: '/thematic2', title: 'vel sint autem' },
+    ];
+    const post: WPPostPreview = {
+      acfPosts: {
+        postsInThematic: thematics,
+      },
+      commentCount: 6,
+      contentParts: {
+        beforeMore:
+          'Et quos fuga molestias. Voluptatum nobis mollitia eaque dolorem sunt. Dolores dignissimos consequuntur mollitia. Enim molestias quibusdam sequi. Dolore ut quo. Libero iure non vel reprehenderit.',
+      },
+      databaseId: 5,
+      date: '2021-04-28',
+      featuredImage: null,
+      info: {
+        wordsCount: 450,
+      },
+      modified: '2021-04-29',
+      slug: '/the-post-slug',
+      title: 'et tempore sint',
+    };
+    const result = convertPostPreviewToArticlePreview(post);
+
+    expect(result.meta.thematics).toStrictEqual(
+      thematics.map(convertTaxonomyToPageLink)
+    );
+  });
+});
diff --git a/src/services/graphql/helpers/convert-post-preview-to-article-preview.ts b/src/services/graphql/helpers/convert-post-preview-to-article-preview.ts
new file mode 100644
index 0000000..78777eb
--- /dev/null
+++ b/src/services/graphql/helpers/convert-post-preview-to-article-preview.ts
@@ -0,0 +1,36 @@
+import type { ArticlePreview, WPPostPreview } from '../../../types';
+import { convertTaxonomyToPageLink } from './convert-taxonomy-to-page-link';
+import { convertWPImgToImg } from './convert-wp-image-to-img';
+
+export const convertPostPreviewToArticlePreview = ({
+  acfPosts,
+  commentCount,
+  contentParts,
+  databaseId,
+  date,
+  featuredImage,
+  info,
+  modified,
+  slug,
+  title,
+}: WPPostPreview): ArticlePreview => {
+  return {
+    id: databaseId,
+    intro: contentParts.beforeMore,
+    meta: {
+      commentsCount: typeof commentCount === 'number' ? commentCount : 0,
+      cover: featuredImage ? convertWPImgToImg(featuredImage.node) : undefined,
+      dates: {
+        publication: date,
+        update: modified,
+      },
+      thematics:
+        acfPosts && 'postsInThematic' in acfPosts
+          ? acfPosts.postsInThematic?.map(convertTaxonomyToPageLink)
+          : undefined,
+      wordsCount: info.wordsCount,
+    },
+    slug,
+    title,
+  };
+};
diff --git a/src/services/graphql/helpers/convert-post-to-article.test.ts b/src/services/graphql/helpers/convert-post-to-article.test.ts
new file mode 100644
index 0000000..0a1c359
--- /dev/null
+++ b/src/services/graphql/helpers/convert-post-to-article.test.ts
@@ -0,0 +1,125 @@
+import { describe, expect, it } from '@jest/globals';
+import type { WPPost } from '../../../types';
+import { convertPostToArticle } from './convert-post-to-article';
+import { convertWPImgToImg } from './convert-wp-image-to-img';
+
+describe('convert-post-to-article', () => {
+  /* eslint-disable max-statements */
+  it('converts a WPPost object to an Article object', async () => {
+    const post: WPPost = {
+      acfPosts: null,
+      author: { node: { name: 'Vince5' } },
+      commentCount: 10,
+      contentParts: {
+        afterMore:
+          'Eum est rerum neque placeat iure veniam enim consequatur assumenda. Quos eos placeat ea et vel sit ratione fugit. Modi qui sint iure beatae illo voluptas.',
+        beforeMore:
+          'Omnis ab qui dolorem praesentium voluptas asperiores officiis. Id nostrum minus quae ducimus tenetur eum a rem eum. Aut odio libero sit soluta ullam odit.',
+      },
+      databaseId: 8,
+      date: '2022-05-04',
+      featuredImage: null,
+      info: { wordsCount: 300 },
+      modified: '2022-06-01',
+      seo: {
+        metaDesc: 'Est non debitis quas harum quasi voluptatem qui.',
+        title: 'consequuntur molestiae amet',
+      },
+      slug: '/the-post-slug',
+      title: 'ea vero repellat',
+    };
+    const result = await convertPostToArticle(post);
+
+    // eslint-disable-next-line @typescript-eslint/no-magic-numbers
+    expect.assertions(15);
+
+    expect(result.content).toBe(post.contentParts.afterMore);
+    expect(result.id).toBe(post.databaseId);
+    expect(result.intro).toBe(post.contentParts.beforeMore);
+    expect(result.meta.author).toBe(post.author.node.name);
+    expect(result.meta.commentsCount).toBe(post.commentCount);
+    expect(result.meta.cover).toBeUndefined();
+    expect(result.meta.dates.publication).toBe(post.date);
+    expect(result.meta.dates.update).toBe(post.modified);
+    expect(result.meta.seo.description).toBe(post.seo.metaDesc);
+    expect(result.meta.seo.title).toBe(post.seo.title);
+    expect(result.meta.thematics).toBeUndefined();
+    expect(result.meta.topics).toBeUndefined();
+    expect(result.meta.wordsCount).toBe(post.info.wordsCount);
+    expect(result.slug).toBe(post.slug);
+    expect(result.title).toBe(post.title);
+  });
+  /* eslint-enable max-statements */
+
+  it('can convert the cover', async () => {
+    const post = {
+      acfPosts: null,
+      author: { node: { name: 'Vince5' } },
+      commentCount: null,
+      contentParts: {
+        afterMore:
+          'Eum est rerum neque placeat iure veniam enim consequatur assumenda. Quos eos placeat ea et vel sit ratione fugit. Modi qui sint iure beatae illo voluptas.',
+        beforeMore:
+          'Omnis ab qui dolorem praesentium voluptas asperiores officiis. Id nostrum minus quae ducimus tenetur eum a rem eum. Aut odio libero sit soluta ullam odit.',
+      },
+      databaseId: 8,
+      date: '2022-05-04',
+      featuredImage: {
+        node: {
+          altText: 'molestiae praesentium animi',
+          mediaDetails: {
+            height: 480,
+            width: 640,
+          },
+          sourceUrl: 'https://picsum.photos/640/480',
+          title: 'ullam deserunt perspiciatis',
+        },
+      },
+      info: { wordsCount: 300 },
+      modified: '2022-06-01',
+      seo: {
+        metaDesc: 'Est non debitis quas harum quasi voluptatem qui.',
+        title: 'consequuntur molestiae amet',
+      },
+      slug: '/the-post-slug',
+      title: 'ea vero repellat',
+    } satisfies WPPost;
+    const result = await convertPostToArticle(post);
+
+    expect.assertions(1);
+
+    expect(result.meta.cover).toStrictEqual(
+      convertWPImgToImg(post.featuredImage.node)
+    );
+  });
+
+  it('can return 0 as comment count when not defined', async () => {
+    const post: WPPost = {
+      acfPosts: null,
+      author: { node: { name: 'Vince5' } },
+      commentCount: null,
+      contentParts: {
+        afterMore:
+          'Eum est rerum neque placeat iure veniam enim consequatur assumenda. Quos eos placeat ea et vel sit ratione fugit. Modi qui sint iure beatae illo voluptas.',
+        beforeMore:
+          'Omnis ab qui dolorem praesentium voluptas asperiores officiis. Id nostrum minus quae ducimus tenetur eum a rem eum. Aut odio libero sit soluta ullam odit.',
+      },
+      databaseId: 8,
+      date: '2022-05-04',
+      featuredImage: null,
+      info: { wordsCount: 300 },
+      modified: '2022-06-01',
+      seo: {
+        metaDesc: 'Est non debitis quas harum quasi voluptatem qui.',
+        title: 'consequuntur molestiae amet',
+      },
+      slug: '/the-post-slug',
+      title: 'ea vero repellat',
+    };
+    const result = await convertPostToArticle(post);
+
+    expect.assertions(1);
+
+    expect(result.meta.commentsCount).toBe(0);
+  });
+});
diff --git a/src/services/graphql/helpers/convert-post-to-article.ts b/src/services/graphql/helpers/convert-post-to-article.ts
new file mode 100644
index 0000000..b540a77
--- /dev/null
+++ b/src/services/graphql/helpers/convert-post-to-article.ts
@@ -0,0 +1,43 @@
+import type { Article, WPPost } from '../../../types';
+import { updateContentTree } from '../../../utils/helpers';
+import { convertTaxonomyToPageLink } from './convert-taxonomy-to-page-link';
+import { convertWPImgToImg } from './convert-wp-image-to-img';
+
+export const convertPostToArticle = async ({
+  acfPosts,
+  author,
+  commentCount,
+  contentParts,
+  databaseId,
+  date,
+  featuredImage,
+  info,
+  modified,
+  seo,
+  slug,
+  title,
+}: WPPost): Promise<Article> => {
+  return {
+    content: await updateContentTree(contentParts.afterMore),
+    id: databaseId,
+    intro: contentParts.beforeMore,
+    meta: {
+      author: author.node.name,
+      commentsCount: commentCount ?? 0,
+      cover: featuredImage ? convertWPImgToImg(featuredImage.node) : undefined,
+      dates: {
+        publication: date,
+        update: modified,
+      },
+      seo: {
+        description: seo.metaDesc,
+        title: seo.title,
+      },
+      thematics: acfPosts?.postsInThematic?.map(convertTaxonomyToPageLink),
+      topics: acfPosts?.postsInTopic?.map(convertTaxonomyToPageLink),
+      wordsCount: info.wordsCount,
+    },
+    slug,
+    title,
+  };
+};
diff --git a/src/services/graphql/helpers/convert-recent-post-to-recent-article.test.ts b/src/services/graphql/helpers/convert-recent-post-to-recent-article.test.ts
new file mode 100644
index 0000000..8acf753
--- /dev/null
+++ b/src/services/graphql/helpers/convert-recent-post-to-recent-article.test.ts
@@ -0,0 +1,48 @@
+import { describe, expect, it } from '@jest/globals';
+import type { RecentWPPost } from '../../../types';
+import { convertRecentPostToRecentArticle } from './convert-recent-post-to-recent-article';
+import { convertWPImgToImg } from './convert-wp-image-to-img';
+
+describe('convert-recent-post-to-recent-article', () => {
+  it('converts a RecentWPPost object to a RecentArticle object', () => {
+    const post: RecentWPPost = {
+      databaseId: 5,
+      date: '2022-03-20',
+      featuredImage: null,
+      slug: '/the-post-slug',
+      title: 'veritatis ex autem',
+    };
+    const result = convertRecentPostToRecentArticle(post);
+
+    expect(result.cover).toBeUndefined();
+    expect(result.id).toBe(post.databaseId);
+    expect(result.publicationDate).toBe(post.date);
+    expect(result.slug).toBe(post.slug);
+    expect(result.title).toBe(post.title);
+  });
+
+  it('can convert the cover', () => {
+    const post = {
+      databaseId: 5,
+      date: '2022-03-20',
+      featuredImage: {
+        node: {
+          altText: 'molestiae praesentium animi',
+          mediaDetails: {
+            height: 480,
+            width: 640,
+          },
+          sourceUrl: 'https://picsum.photos/640/480',
+          title: 'ullam deserunt perspiciatis',
+        },
+      },
+      slug: '/the-post-slug',
+      title: 'veritatis ex autem',
+    } satisfies RecentWPPost;
+    const result = convertRecentPostToRecentArticle(post);
+
+    expect(result.cover).toStrictEqual(
+      convertWPImgToImg(post.featuredImage.node)
+    );
+  });
+});
diff --git a/src/services/graphql/helpers/convert-recent-post-to-recent-article.ts b/src/services/graphql/helpers/convert-recent-post-to-recent-article.ts
new file mode 100644
index 0000000..ff5eb67
--- /dev/null
+++ b/src/services/graphql/helpers/convert-recent-post-to-recent-article.ts
@@ -0,0 +1,24 @@
+import type { RecentArticle, RecentWPPost } from '../../../types';
+import { convertWPImgToImg } from './convert-wp-image-to-img';
+
+/**
+ * Convert a WordPress post to an article.
+ *
+ * @param {RecentWPPost} post - A post.
+ * @returns {RecentArticle} An article.
+ */
+export const convertRecentPostToRecentArticle = ({
+  databaseId,
+  date,
+  featuredImage,
+  slug,
+  title,
+}: RecentWPPost): RecentArticle => {
+  return {
+    cover: featuredImage ? convertWPImgToImg(featuredImage.node) : undefined,
+    id: databaseId,
+    publicationDate: date,
+    slug,
+    title,
+  };
+};
diff --git a/src/services/graphql/helpers/convert-taxonomy-to-page-link.test.ts b/src/services/graphql/helpers/convert-taxonomy-to-page-link.test.ts
new file mode 100644
index 0000000..b687ccb
--- /dev/null
+++ b/src/services/graphql/helpers/convert-taxonomy-to-page-link.test.ts
@@ -0,0 +1,52 @@
+import { describe, expect, it } from '@jest/globals';
+import type { WPThematicPreview, WPTopicPreview } from '../../../types';
+import { convertTaxonomyToPageLink } from './convert-taxonomy-to-page-link';
+
+describe('convert-taxonomy-to-page-link', () => {
+  it('can convert a WPThematicPreview object to a Thematic object', () => {
+    const thematic: WPThematicPreview = {
+      databaseId: 42,
+      slug: '/the-thematic-slug',
+      title: 'et ut alias',
+    };
+    const result = convertTaxonomyToPageLink(thematic);
+
+    expect(result.id).toBe(thematic.databaseId);
+    expect(result.logo).toBeUndefined();
+    expect(result.name).toBe(thematic.title);
+    expect(result.url).toBe(thematic.slug);
+  });
+
+  it('can convert a WPTopicPreview object to a Topic object', () => {
+    const topic: WPTopicPreview = {
+      databaseId: 42,
+      featuredImage: {
+        node: {
+          altText: 'dolorem quia possimus',
+          mediaDetails: {
+            height: 480,
+            width: 640,
+          },
+          sourceUrl: 'https://picsum.photos/640/480',
+          title: 'eos',
+        },
+      },
+      slug: '/the-topic-slug',
+      title: 'et ut alias',
+    };
+    const result = convertTaxonomyToPageLink(topic);
+
+    expect(result.id).toBe(topic.databaseId);
+    expect(result.logo?.alt).toBe(topic.featuredImage?.node.altText);
+    expect(result.logo?.height).toBe(
+      topic.featuredImage?.node.mediaDetails.height
+    );
+    expect(result.logo?.src).toBe(topic.featuredImage?.node.sourceUrl);
+    expect(result.logo?.title).toBe(topic.featuredImage?.node.title);
+    expect(result.logo?.width).toBe(
+      topic.featuredImage?.node.mediaDetails.width
+    );
+    expect(result.name).toBe(topic.title);
+    expect(result.url).toBe(topic.slug);
+  });
+});
diff --git a/src/services/graphql/helpers/convert-taxonomy-to-page-link.ts b/src/services/graphql/helpers/convert-taxonomy-to-page-link.ts
new file mode 100644
index 0000000..2294fb7
--- /dev/null
+++ b/src/services/graphql/helpers/convert-taxonomy-to-page-link.ts
@@ -0,0 +1,23 @@
+import type {
+  PageLink,
+  WPThematicPreview,
+  WPTopicPreview,
+} from '../../../types';
+import { convertWPImgToImg } from './convert-wp-image-to-img';
+
+export const convertTaxonomyToPageLink = ({
+  databaseId,
+  slug,
+  title,
+  ...props
+}: WPThematicPreview | WPTopicPreview): PageLink => {
+  return {
+    id: databaseId,
+    logo:
+      'featuredImage' in props && props.featuredImage
+        ? convertWPImgToImg(props.featuredImage.node)
+        : undefined,
+    name: title,
+    url: slug,
+  };
+};
diff --git a/src/services/graphql/helpers/convert-wp-comment-to-comment.test.ts b/src/services/graphql/helpers/convert-wp-comment-to-comment.test.ts
new file mode 100644
index 0000000..4b385b4
--- /dev/null
+++ b/src/services/graphql/helpers/convert-wp-comment-to-comment.test.ts
@@ -0,0 +1,93 @@
+import { describe, expect, it } from '@jest/globals';
+import type { WPComment } from '../../../types';
+import { convertWPCommentToComment } from './convert-wp-comment-to-comment';
+
+describe('convert-wp-comment-to-comment', () => {
+  it('converts a WPComment object to a Comment object', () => {
+    const comment: WPComment = {
+      approved: true,
+      author: {
+        node: {
+          avatar: null,
+          name: 'Maribel.Roberts',
+          url: null,
+        },
+      },
+      content: 'Aliquam qui et facere consequatur quia.',
+      databaseId: 4,
+      date: '2023-10-15',
+      parentDatabaseId: 1,
+      status: 'HOLD',
+    };
+
+    const transformedComment = convertWPCommentToComment(comment);
+
+    expect(transformedComment.content).toBe(comment.content);
+    expect(transformedComment.id).toBe(comment.databaseId);
+    expect(transformedComment.isApproved).toBe(comment.approved);
+    expect(transformedComment.meta.author.avatar).toBeUndefined();
+    expect(transformedComment.meta.author.name).toBe(comment.author.node.name);
+    expect(transformedComment.meta.author.website).toBeUndefined();
+    expect(transformedComment.parentId).toBe(comment.parentDatabaseId);
+    expect(transformedComment.replies).toStrictEqual([]);
+  });
+
+  it('can convert the avatar', () => {
+    const comment: WPComment = {
+      approved: true,
+      author: {
+        node: {
+          avatar: {
+            height: 80,
+            url: 'https://cloudflare-ipfs.com/ipfs/Qmd3W5DuhgHirLHGVixi6V76LhCkZUz6pnFt5AJBiyvHye/avatar/426.jpg',
+            width: 80,
+          },
+          name: 'Maribel.Roberts',
+          url: null,
+        },
+      },
+      content: 'Aliquam qui et facere consequatur quia.',
+      databaseId: 4,
+      date: '2023-10-15',
+      parentDatabaseId: 1,
+      status: 'HOLD',
+    };
+
+    const transformedComment = convertWPCommentToComment(comment);
+
+    expect(transformedComment.meta.author.avatar?.alt).toBe(
+      `${comment.author.node.name} avatar`
+    );
+    expect(transformedComment.meta.author.avatar?.height).toBe(
+      comment.author.node.avatar?.height
+    );
+    expect(transformedComment.meta.author.avatar?.src).toBe(
+      comment.author.node.avatar?.url
+    );
+    expect(transformedComment.meta.author.avatar?.width).toBe(
+      comment.author.node.avatar?.width
+    );
+  });
+
+  it('can remove the parentId when not meaningful', () => {
+    const comment: WPComment = {
+      approved: true,
+      author: {
+        node: {
+          avatar: null,
+          name: 'Maribel.Roberts',
+          url: null,
+        },
+      },
+      content: 'Aliquam qui et facere consequatur quia.',
+      databaseId: 4,
+      date: '2023-10-15',
+      parentDatabaseId: 0,
+      status: 'HOLD',
+    };
+
+    const transformedComment = convertWPCommentToComment(comment);
+
+    expect(transformedComment.parentId).toBeUndefined();
+  });
+});
diff --git a/src/services/graphql/helpers/convert-wp-comment-to-comment.ts b/src/services/graphql/helpers/convert-wp-comment-to-comment.ts
new file mode 100644
index 0000000..7a7e2ca
--- /dev/null
+++ b/src/services/graphql/helpers/convert-wp-comment-to-comment.ts
@@ -0,0 +1,35 @@
+import type { SingleComment, WPComment } from '../../../types';
+
+/**
+ * Convert a comment from WordPress type to SingleComment.
+ *
+ * @param {WPComment} comment - A raw comment from WordPress.
+ * @returns {SingleComment} A comment.
+ */
+export const convertWPCommentToComment = (
+  comment: WPComment
+): SingleComment => {
+  return {
+    content: comment.content,
+    isApproved: comment.approved,
+    id: comment.databaseId,
+    meta: {
+      author: {
+        name: comment.author.node.name,
+        avatar: comment.author.node.avatar
+          ? {
+              alt: `${comment.author.node.name} avatar`,
+              height: comment.author.node.avatar.height,
+              src: comment.author.node.avatar.url,
+              width: comment.author.node.avatar.width,
+            }
+          : undefined,
+        website: comment.author.node.url ?? undefined,
+      },
+      date: comment.date,
+    },
+    parentId:
+      comment.parentDatabaseId === 0 ? undefined : comment.parentDatabaseId,
+    replies: [],
+  };
+};
diff --git a/src/services/graphql/helpers/convert-wp-image-to-img.test.ts b/src/services/graphql/helpers/convert-wp-image-to-img.test.ts
new file mode 100644
index 0000000..ca58a4f
--- /dev/null
+++ b/src/services/graphql/helpers/convert-wp-image-to-img.test.ts
@@ -0,0 +1,41 @@
+import { describe, expect, it } from '@jest/globals';
+import type { WPImage } from '../../../types';
+import { convertWPImgToImg } from './convert-wp-image-to-img';
+
+describe('convert-wp-image-to-img', () => {
+  it('converts a WPImage object to an Img object', () => {
+    const img: WPImage = {
+      altText: 'molestiae praesentium animi',
+      mediaDetails: {
+        height: 480,
+        width: 640,
+      },
+      sourceUrl: 'https://picsum.photos/640/480',
+      title: null,
+    };
+
+    const transformedImg = convertWPImgToImg(img);
+
+    expect(transformedImg.alt).toBe(img.altText);
+    expect(transformedImg.height).toBe(img.mediaDetails.height);
+    expect(transformedImg.src).toBe(img.sourceUrl);
+    expect(transformedImg.title).toBeUndefined();
+    expect(transformedImg.width).toBe(img.mediaDetails.width);
+  });
+
+  it('can return an empty string if altText is missing', () => {
+    const img: WPImage = {
+      altText: null,
+      mediaDetails: {
+        height: 480,
+        width: 640,
+      },
+      sourceUrl: 'https://picsum.photos/640/480',
+      title: null,
+    };
+
+    const transformedImg = convertWPImgToImg(img);
+
+    expect(transformedImg.alt).toBe('');
+  });
+});
diff --git a/src/services/graphql/helpers/convert-wp-image-to-img.ts b/src/services/graphql/helpers/convert-wp-image-to-img.ts
new file mode 100644
index 0000000..392aaf9
--- /dev/null
+++ b/src/services/graphql/helpers/convert-wp-image-to-img.ts
@@ -0,0 +1,16 @@
+import type { Img, WPImage } from '../../../types';
+
+export const convertWPImgToImg = ({
+  altText,
+  mediaDetails,
+  sourceUrl,
+  title,
+}: WPImage): Img => {
+  return {
+    alt: altText ?? '',
+    height: mediaDetails.height,
+    src: sourceUrl,
+    title: title ?? undefined,
+    width: mediaDetails.width,
+  };
+};
diff --git a/src/services/graphql/helpers/index.ts b/src/services/graphql/helpers/index.ts
new file mode 100644
index 0000000..16e93d2
--- /dev/null
+++ b/src/services/graphql/helpers/index.ts
@@ -0,0 +1,7 @@
+export * from './build-comments-tree';
+export * from './convert-post-preview-to-article-preview';
+export * from './convert-post-to-article';
+export * from './convert-recent-post-to-recent-article';
+export * from './convert-taxonomy-to-page-link';
+export * from './convert-wp-comment-to-comment';
+export * from './convert-wp-image-to-img';
diff --git a/src/services/graphql/index.ts b/src/services/graphql/index.ts
index c1eac16..53afbc7 100644
--- a/src/services/graphql/index.ts
+++ b/src/services/graphql/index.ts
@@ -1,12 +1,3 @@
-export * from './api';
-export * from './articles';
-export * from './articles.query';
-export * from './comments';
-export * from './comments.mutation';
-export * from './comments.query';
-export * from './contact';
-export * from './contact.mutation';
-export * from './thematics';
-export * from './thematics.query';
-export * from './topics';
-export * from './topics.query';
+export * from './fetchers';
+export * from './helpers';
+export * from './mutators';
diff --git a/src/services/graphql/mutators/create-comment.ts b/src/services/graphql/mutators/create-comment.ts
new file mode 100644
index 0000000..d9d177d
--- /dev/null
+++ b/src/services/graphql/mutators/create-comment.ts
@@ -0,0 +1,70 @@
+import type { Nullable } from '../../../types';
+import { fetchGraphQL, getGraphQLUrl } from '../../../utils/helpers';
+
+type CreatedComment = {
+  clientMutationId: string;
+  success: boolean;
+  comment: Nullable<{
+    approved: boolean;
+  }>;
+};
+
+type CreateCommentResponse = {
+  createComment: CreatedComment;
+};
+
+export const createCommentMutation = `mutation CreateComment(
+  $author: String!
+  $authorEmail: String!
+  $authorUrl: String!
+  $content: String!
+  $parent: ID = null
+  $commentOn: Int!
+  $clientMutationId: String!
+) {
+  createComment(
+    input: {
+      author: $author
+      authorEmail: $authorEmail
+      authorUrl: $authorUrl
+      content: $content
+      parent: $parent
+      commentOn: $commentOn
+      clientMutationId: $clientMutationId
+    }
+  ) {
+    clientMutationId
+    success
+    comment {
+      approved
+    }
+  }
+}`;
+
+export type CreateCommentInput = {
+  author: string;
+  authorEmail: string;
+  authorUrl: string;
+  clientMutationId: string;
+  commentOn: number;
+  content: string;
+  parent?: number;
+};
+
+/**
+ * Create a new comment using GraphQL API.
+ *
+ * @param {CreateCommentInput} input - The comment data.
+ * @returns {Promise<CreatedComment>} The created comment.
+ */
+export const createComment = async (
+  input: CreateCommentInput
+): Promise<CreatedComment> => {
+  const response = await fetchGraphQL<CreateCommentResponse>({
+    query: createCommentMutation,
+    url: getGraphQLUrl(),
+    variables: { ...input },
+  });
+
+  return response.createComment;
+};
diff --git a/src/services/graphql/mutators/index.ts b/src/services/graphql/mutators/index.ts
new file mode 100644
index 0000000..dfdd511
--- /dev/null
+++ b/src/services/graphql/mutators/index.ts
@@ -0,0 +1,2 @@
+export * from './create-comment';
+export * from './send-email';
diff --git a/src/services/graphql/mutators/send-email.ts b/src/services/graphql/mutators/send-email.ts
new file mode 100644
index 0000000..45b6fca
--- /dev/null
+++ b/src/services/graphql/mutators/send-email.ts
@@ -0,0 +1,49 @@
+import { fetchGraphQL, getGraphQLUrl } from 'src/utils/helpers';
+
+type SentEmail = {
+  clientMutationId: string;
+  message: string;
+  origin: string;
+  replyTo: string;
+  sent: boolean;
+};
+
+type SendEmailResponse = {
+  sendEmail: SentEmail;
+};
+
+const sendMailMutation = `mutation SendEmail($body: String, $clientMutationId: String, $replyTo: String, $subject: String) {
+  sendEmail(
+    input: {body: $body, clientMutationId: $clientMutationId, replyTo: $replyTo, subject: $subject}
+  ) {
+    clientMutationId
+    message
+    origin
+    replyTo
+    sent
+    to
+  }
+}`;
+
+export type SendMailInput = {
+  body: string;
+  clientMutationId: string;
+  replyTo: string;
+  subject: string;
+};
+
+/**
+ * Send an email using GraphQL API.
+ *
+ * @param {SendMailInput} data - The mail data.
+ * @returns {Promise<SentEmail>} The mutation response.
+ */
+export const sendMail = async (data: SendMailInput): Promise<SentEmail> => {
+  const response = await fetchGraphQL<SendEmailResponse>({
+    query: sendMailMutation,
+    url: getGraphQLUrl(),
+    variables: { ...data },
+  });
+
+  return response.sendEmail;
+};
diff --git a/src/services/graphql/thematics.query.ts b/src/services/graphql/thematics.query.ts
deleted file mode 100644
index 5a82133..0000000
--- a/src/services/graphql/thematics.query.ts
+++ /dev/null
@@ -1,125 +0,0 @@
-/**
- * Query the full thematic data using its slug.
- */
-export const thematicBySlugQuery = `query ThematicBy($slug: ID!) {
-  thematic(id: $slug, idType: SLUG) {
-    acfThematics {
-      postsInThematic {
-        ... on Post {
-          acfPosts {
-            postsInTopic {
-              ... on Topic {
-                databaseId
-                slug
-                title
-              }
-            }
-          }
-          commentCount
-          contentParts {
-            beforeMore
-          }
-          databaseId
-          date
-          featuredImage {
-            node {
-              altText
-              mediaDetails {
-                height
-                width
-              }
-              sourceUrl
-              title
-            }
-          }
-          info {
-            wordsCount
-          }
-          modified
-          slug
-          title
-        }
-      }
-    }
-    contentParts {
-      afterMore
-      beforeMore
-    }
-    databaseId
-    date
-    featuredImage {
-      node {
-        altText
-        mediaDetails {
-          height
-          width
-        }
-        sourceUrl
-        title
-      }
-    }
-    info {
-      wordsCount
-    }
-    modified
-    seo {
-      metaDesc
-      title
-    }
-    slug
-    title
-  }
-}`;
-
-/**
- * Query an array of partial thematics.
- */
-export const thematicsListQuery = `query ThematicsList($after: String = "", $first: Int = 10) {
-  thematics(
-    after: $after
-    first: $first
-    where: {orderby: {field: TITLE, order: ASC}, status: PUBLISH}
-  ) {
-    edges {
-      cursor
-      node {
-        databaseId
-        slug
-        title
-      }
-    }
-    pageInfo {
-      endCursor
-      hasNextPage
-      total
-    }
-  }
-}`;
-
-/**
- * Query an array of thematics slug.
- */
-export const thematicsSlugQuery = `query ThematicsSlug($first: Int = 10, $after: String = "") {
-  thematics(after: $after, first: $first) {
-    edges {
-      cursor
-      node {
-        slug
-      }
-    }
-    pageInfo {
-      total
-    }
-  }
-}`;
-
-/**
- * Query the total number of thematics.
- */
-export const totalThematicsQuery = `query ThematicsTotal {
-  thematics {
-    pageInfo {
-      total
-    }
-  }
-}`;
diff --git a/src/services/graphql/thematics.ts b/src/services/graphql/thematics.ts
deleted file mode 100644
index c02a42c..0000000
--- a/src/services/graphql/thematics.ts
+++ /dev/null
@@ -1,157 +0,0 @@
-import type {
-  EdgesResponse,
-  GraphQLEdgesInput,
-  PageLink,
-  RawArticle,
-  RawThematic,
-  RawThematicPreview,
-  Slug,
-  Thematic,
-  TotalItems,
-} from '../../types';
-import {
-  getImageFromRawData,
-  getPageLinkFromRawData,
-  sortPageLinksByName,
-} from '../../utils/helpers';
-import { fetchAPI } from './api';
-import { getArticleFromRawData } from './articles';
-import {
-  thematicBySlugQuery,
-  thematicsListQuery,
-  thematicsSlugQuery,
-  totalThematicsQuery,
-} from './thematics.query';
-
-/**
- * Retrieve the total number of thematics.
- *
- * @returns {Promise<number>} - The thematics total number.
- */
-export const getTotalThematics = async (): Promise<number> => {
-  const response = await fetchAPI<TotalItems, typeof totalThematicsQuery>({
-    query: totalThematicsQuery,
-  });
-
-  return response.thematics.pageInfo.total;
-};
-
-/**
- * Retrieve the given number of thematics from API.
- *
- * @param {GraphQLEdgesInput} props - An object of GraphQL variables.
- * @returns {Promise<EdgesResponse<RawThematicPreview>>} The thematics data.
- */
-export const getThematicsPreview = async (
-  props: GraphQLEdgesInput
-): Promise<EdgesResponse<RawThematicPreview>> => {
-  const response = await fetchAPI<
-    RawThematicPreview,
-    typeof thematicsListQuery
-  >({ query: thematicsListQuery, variables: props });
-
-  return response.thematics;
-};
-
-/**
- * Convert raw data to an Thematic object.
- *
- * @param {RawThematic} data - The page raw data.
- * @returns {Thematic} The page data.
- */
-export const getThematicFromRawData = async (
-  data: RawThematic
-): Promise<Thematic> => {
-  const {
-    acfThematics,
-    contentParts,
-    databaseId,
-    date,
-    featuredImage,
-    info,
-    modified,
-    slug,
-    title,
-    seo,
-  } = data;
-
-  /**
-   * Retrieve an array of related topics.
-   *
-   * @param posts - The thematic posts.
-   * @returns {PageLink[]} An array of topics links.
-   */
-  const getRelatedTopics = (posts: RawArticle[]): PageLink[] => {
-    const topics: PageLink[] = [];
-
-    posts.forEach((post) => {
-      if (post.acfPosts.postsInTopic) {
-        for (const topic of post.acfPosts.postsInTopic) {
-          topics.push(getPageLinkFromRawData(topic, 'topic'));
-        }
-      }
-    });
-
-    const topicsIds = topics.map((topic) => topic.id);
-    const uniqueTopics = topics.filter(
-      ({ id }, index) => !topicsIds.includes(id, index + 1)
-    );
-
-    return uniqueTopics.sort(sortPageLinksByName);
-  };
-
-  return {
-    content: contentParts.afterMore,
-    id: databaseId,
-    intro: contentParts.beforeMore,
-    meta: {
-      articles: await Promise.all(
-        acfThematics.postsInThematic.map(async (post) =>
-          getArticleFromRawData(post)
-        )
-      ),
-      cover: featuredImage?.node
-        ? getImageFromRawData(featuredImage.node)
-        : undefined,
-      dates: { publication: date, update: modified },
-      seo: {
-        description: seo?.metaDesc ?? '',
-        title: seo?.title ?? '',
-      },
-      topics: getRelatedTopics(acfThematics.postsInThematic),
-      wordsCount: info.wordsCount,
-    },
-    slug,
-    title,
-  };
-};
-
-/**
- * Retrieve a Thematic object by slug.
- *
- * @param {string} slug - The thematic slug.
- * @returns {Promise<Article>} The requested thematic.
- */
-export const getThematicBySlug = async (slug: string): Promise<Thematic> => {
-  const response = await fetchAPI<RawThematic, typeof thematicBySlugQuery>({
-    query: thematicBySlugQuery,
-    variables: { slug },
-  });
-
-  return getThematicFromRawData(response.thematic);
-};
-
-/**
- * Retrieve all the thematics slugs.
- *
- * @returns {Promise<string[]>} - An array of thematics slugs.
- */
-export const getAllThematicsSlugs = async (): Promise<string[]> => {
-  const totalThematics = await getTotalThematics();
-  const response = await fetchAPI<Slug, typeof thematicsSlugQuery>({
-    query: thematicsSlugQuery,
-    variables: { first: totalThematics },
-  });
-
-  return response.thematics.edges.map((edge) => edge.node.slug);
-};
diff --git a/src/services/graphql/topics.query.ts b/src/services/graphql/topics.query.ts
deleted file mode 100644
index 57b2569..0000000
--- a/src/services/graphql/topics.query.ts
+++ /dev/null
@@ -1,137 +0,0 @@
-/**
- * Query the full topic data using its slug.
- */
-export const topicBySlugQuery = `query TopicBy($slug: ID!) {
-  topic(id: $slug, idType: SLUG) {
-    acfTopics {
-      officialWebsite
-      postsInTopic {
-        ... on Post {
-          acfPosts {
-            postsInThematic {
-              ... on Thematic {
-                databaseId
-                slug
-                title
-              }
-            }
-          }
-          commentCount
-          contentParts {
-            beforeMore
-          }
-          databaseId
-          date
-          featuredImage {
-            node {
-              altText
-              mediaDetails {
-                height
-                width
-              }
-              sourceUrl
-              title
-            }
-          }
-          info {
-            wordsCount
-          }
-          modified
-          slug
-          title
-        }
-      }
-    }
-    contentParts {
-      afterMore
-      beforeMore
-    }
-    databaseId
-    date
-    featuredImage {
-      node {
-        altText
-        mediaDetails {
-          height
-          width
-        }
-        sourceUrl
-        title
-      }
-    }
-    info {
-      wordsCount
-    }
-    modified
-    seo {
-      metaDesc
-      title
-    }
-    slug
-    title
-  }
-}`;
-
-/**
- * Query an array of partial topics.
- */
-export const topicsListQuery = `query TopicsList($after: String = "", $first: Int = 10) {
-  topics(
-    after: $after
-    first: $first
-    where: {orderby: {field: TITLE, order: ASC}, status: PUBLISH}
-  ) {
-    edges {
-      cursor
-      node {
-        databaseId
-        featuredImage {
-          node {
-            altText
-            mediaDetails {
-              height
-              width
-            }
-            sourceUrl
-            title
-          }
-        }
-        slug
-        title
-      }
-    }
-    pageInfo {
-      endCursor
-      hasNextPage
-      total
-    }
-  }
-}`;
-
-/**
- * Query an array of topics slug.
- */
-export const topicsSlugQuery = `query TopicsSlug($first: Int = 10, $after: String = "") {
-  topics(after: $after, first: $first) {
-    edges {
-      cursor
-      node {
-        slug
-      }
-    }
-    pageInfo {
-      total
-    }
-  }
-}`;
-
-/**
- * Query the total number of topics.
- */
-export const totalTopicsQuery = `query TopicsTotal {
-  topics {
-    pageInfo {
-      total
-    }
-  }
-}`;
diff --git a/src/services/graphql/topics.ts b/src/services/graphql/topics.ts
deleted file mode 100644
index d8a9b6a..0000000
--- a/src/services/graphql/topics.ts
+++ /dev/null
@@ -1,154 +0,0 @@
-import type {
-  EdgesResponse,
-  GraphQLEdgesInput,
-  PageLink,
-  RawArticle,
-  RawTopic,
-  RawTopicPreview,
-  Slug,
-  Topic,
-  TotalItems,
-} from '../../types';
-import {
-  getImageFromRawData,
-  getPageLinkFromRawData,
-  sortPageLinksByName,
-} from '../../utils/helpers';
-import { fetchAPI } from './api';
-import { getArticleFromRawData } from './articles';
-import {
-  topicBySlugQuery,
-  topicsListQuery,
-  topicsSlugQuery,
-  totalTopicsQuery,
-} from './topics.query';
-
-/**
- * Retrieve the total number of topics.
- *
- * @returns {Promise<number>} - The topics total number.
- */
-export const getTotalTopics = async (): Promise<number> => {
-  const response = await fetchAPI<TotalItems, typeof totalTopicsQuery>({
-    query: totalTopicsQuery,
-  });
-
-  return response.topics.pageInfo.total;
-};
-
-/**
- * Retrieve the given number of topics from API.
- *
- * @param {GraphQLEdgesInput} props - An object of GraphQL variables.
- * @returns {Promise<EdgesResponse<RawTopicPreview>>} The topics data.
- */
-export const getTopicsPreview = async (
-  props: GraphQLEdgesInput
-): Promise<EdgesResponse<RawTopicPreview>> => {
-  const response = await fetchAPI<RawTopicPreview, typeof topicsListQuery>({
-    query: topicsListQuery,
-    variables: props,
-  });
-
-  return response.topics;
-};
-
-/**
- * Convert raw data to a Topic object.
- *
- * @param {RawTopic} data - The page raw data.
- * @returns {Topic} The page data.
- */
-export const getTopicFromRawData = async (data: RawTopic): Promise<Topic> => {
-  const {
-    acfTopics,
-    contentParts,
-    databaseId,
-    date,
-    featuredImage,
-    info,
-    modified,
-    slug,
-    title,
-    seo,
-  } = data;
-
-  /**
-   * Retrieve an array of related topics.
-   *
-   * @param posts - The topic posts.
-   * @returns {PageLink[]} An array of topics links.
-   */
-  const getRelatedThematics = (posts: RawArticle[]): PageLink[] => {
-    const thematics: PageLink[] = [];
-
-    posts.forEach((post) => {
-      if (post.acfPosts.postsInThematic) {
-        for (const thematic of post.acfPosts.postsInThematic) {
-          thematics.push(getPageLinkFromRawData(thematic, 'thematic'));
-        }
-      }
-    });
-
-    const thematicsIds = thematics.map((thematic) => thematic.id);
-    const uniqueThematics = thematics.filter(
-      ({ id }, index) => !thematicsIds.includes(id, index + 1)
-    );
-
-    return uniqueThematics.sort(sortPageLinksByName);
-  };
-
-  return {
-    content: contentParts.afterMore,
-    id: databaseId,
-    intro: contentParts.beforeMore,
-    meta: {
-      articles: await Promise.all(
-        acfTopics.postsInTopic.map(async (post) => getArticleFromRawData(post))
-      ),
-      cover: featuredImage?.node
-        ? getImageFromRawData(featuredImage.node)
-        : undefined,
-      dates: { publication: date, update: modified },
-      website: acfTopics.officialWebsite,
-      seo: {
-        description: seo?.metaDesc ?? '',
-        title: seo?.title ?? '',
-      },
-      thematics: getRelatedThematics(acfTopics.postsInTopic),
-      wordsCount: info.wordsCount,
-    },
-    slug,
-    title,
-  };
-};
-
-/**
- * Retrieve a Topic object by slug.
- *
- * @param {string} slug - The topic slug.
- * @returns {Promise<Article>} The requested topic.
- */
-export const getTopicBySlug = async (slug: string): Promise<Topic> => {
-  const response = await fetchAPI<RawTopic, typeof topicBySlugQuery>({
-    query: topicBySlugQuery,
-    variables: { slug },
-  });
-
-  return getTopicFromRawData(response.topic);
-};
-
-/**
- * Retrieve all the topics slugs.
- *
- * @returns {Promise<string[]>} - An array of topics slugs.
- */
-export const getAllTopicsSlugs = async (): Promise<string[]> => {
-  const totalTopics = await getTotalTopics();
-  const response = await fetchAPI<Slug, typeof topicsSlugQuery>({
-    query: topicsSlugQuery,
-    variables: { first: totalTopics },
-  });
-
-  return response.topics.edges.map((edge) => edge.node.slug);
-};
diff --git a/src/types/app.ts b/src/types/app.ts
index b613e6e..218d63b 100644
--- a/src/types/app.ts
+++ b/src/types/app.ts
@@ -28,108 +28,6 @@ export type AppPropsWithLayout = AppProps<CustomPageProps> & {
   Component: NextPageWithLayout;
 };
 
-export type ContentKind =
-  | 'article'
-  | 'comment'
-  | 'page'
-  | 'project'
-  | 'thematic'
-  | 'topic';
-
-export type Author<T extends ContentKind> = {
-  avatar?: Image;
-  description?: T extends 'comment' ? never : string;
-  name: string;
-  website?: string;
-};
-
-export type CommentMeta = {
-  author: Author<'comment'>;
-  date: string;
-};
-
-export type SingleComment = {
-  approved: boolean;
-  content: string;
-  id: number;
-  meta: CommentMeta;
-  parentId?: number;
-  replies: SingleComment[];
-};
-
-export type Dates = {
-  publication: string;
-  update?: string;
-};
-
-export type Image = {
-  alt: string;
-  height: number;
-  src: string;
-  title?: string;
-  width: number;
-};
-
-export type Repos = {
-  github?: string;
-  gitlab?: string;
-};
-
-export type SEO = {
-  description: string;
-  title: string;
-};
-
-export type PageKind = Exclude<ContentKind, 'comment'>;
-
-export type Meta<T extends PageKind> = {
-  articles?: T extends 'thematic' | 'topic' ? Article[] : never;
-  author?: T extends 'article' | 'page' ? Author<T> : never;
-  commentsCount?: T extends 'article' ? number : never;
-  cover?: Image;
-  dates: Dates;
-  license?: T extends 'project' ? string : never;
-  repos?: T extends 'project' ? Repos : never;
-  seo: SEO;
-  tagline?: T extends 'project' ? string : never;
-  technologies?: T extends 'project' ? string[] : never;
-  thematics?: T extends 'article' | 'topic' ? PageLink[] : never;
-  topics?: T extends 'article' | 'thematic' ? PageLink[] : never;
-  website?: T extends 'topic' ? string : never;
-  wordsCount: number;
-};
-
-export type Page<T extends PageKind> = {
-  content: string;
-  id: number | string;
-  intro: string;
-  meta: Meta<T>;
-  slug: string;
-  title: string;
-};
-
-export type PageLink = {
-  id: number;
-  logo?: Image;
-  name: string;
-  url: string;
-};
-
-export type Article = Page<'article'>;
-export type ArticleCard = Pick<Article, 'id' | 'slug' | 'title'> &
-  Pick<Meta<'article'>, 'cover' | 'dates'>;
-export type Project = Page<'project'>;
-export type ProjectPreview = Omit<Page<'project'>, 'content'>;
-export type ProjectCard = Pick<Page<'project'>, 'id' | 'slug' | 'title'> & {
-  meta: Pick<Meta<'project'>, 'cover' | 'dates' | 'tagline' | 'technologies'>;
-};
-export type Thematic = Page<'thematic'>;
-export type Topic = Page<'topic'>;
-
-export type Slug = {
-  slug: string;
-};
-
 export type Position = 'bottom' | 'center' | 'left' | 'right' | 'top';
 
 /** Spacing keys defined has CSS variables */
diff --git a/src/types/data.ts b/src/types/data.ts
new file mode 100644
index 0000000..9a6d674
--- /dev/null
+++ b/src/types/data.ts
@@ -0,0 +1,289 @@
+import type { StaticImageData } from 'next/image';
+import type { Nullable } from './generics';
+import type { GraphQLNode } from './gql';
+
+export type SlugNode = {
+  slug: string;
+};
+
+//===========================================================================
+// Data from WordPress
+//===========================================================================
+
+type WPSeo = {
+  metaDesc: string;
+  title: string;
+};
+
+type WPCommentAuthorAvatar = {
+  height: number;
+  url: string;
+  width: number;
+};
+
+type WPCommentAuthor = {
+  avatar: Nullable<WPCommentAuthorAvatar>;
+  name: string;
+  url: Nullable<string>;
+};
+
+export type WPCommentStatus = 'APPROVE' | 'HOLD' | 'SPAM' | 'TRASH';
+
+export type WPComment = {
+  approved: boolean;
+  author: GraphQLNode<WPCommentAuthor>;
+  content: string;
+  databaseId: number;
+  date: string;
+  parentDatabaseId: number;
+  status: WPCommentStatus;
+};
+
+type WPContentParts = {
+  afterMore: string;
+  beforeMore: string;
+};
+
+export type WPImage = {
+  altText: Nullable<string>;
+  mediaDetails: {
+    height: number;
+    width: number;
+  };
+  sourceUrl: string;
+  title: Nullable<string>;
+};
+
+type WPInfo = { wordsCount: number };
+
+type WPContent = {
+  date: string;
+  featuredImage: Nullable<GraphQLNode<WPImage>>;
+  modified: string;
+  seo: WPSeo;
+  slug: string;
+  title: string;
+};
+
+export type WPPage = WPContent & {
+  contentParts: WPContentParts;
+  info: WPInfo;
+};
+
+type WPPostAuthor = { name: string };
+
+type WPAcfPosts = {
+  postsInThematic: Nullable<WPThematicPreview[]>;
+  postsInTopic: Nullable<WPTopicPreview[]>;
+};
+
+export type WPPost = WPContent & {
+  acfPosts: Nullable<Partial<WPAcfPosts>>;
+  author: GraphQLNode<WPPostAuthor>;
+  commentCount: Nullable<number>;
+  contentParts: WPContentParts;
+  databaseId: number;
+  info: WPInfo;
+};
+
+export type WPPostPreview = Pick<
+  WPPost,
+  | 'commentCount'
+  | 'databaseId'
+  | 'date'
+  | 'featuredImage'
+  | 'info'
+  | 'modified'
+  | 'slug'
+  | 'title'
+> & {
+  acfPosts:
+    | Nullable<Pick<WPAcfPosts, 'postsInThematic'>>
+    | Nullable<Pick<WPAcfPosts, 'postsInTopic'>>;
+  contentParts: Pick<WPContentParts, 'beforeMore'>;
+};
+
+export type RecentWPPost = Pick<
+  WPPost,
+  'date' | 'featuredImage' | 'slug' | 'title'
+> & {
+  databaseId: number;
+};
+
+type WPAcfThematics = {
+  postsInThematic: Nullable<WPPostPreview[]>;
+};
+
+export type WPThematic = WPContent & {
+  acfThematics: Nullable<WPAcfThematics>;
+};
+
+export type WPThematicPreview = Pick<WPThematic, 'slug' | 'title'> & {
+  databaseId: number;
+};
+
+type WPAcfTopics = {
+  officialWebsite: string;
+  postsInTopic: Nullable<WPPostPreview[]>;
+};
+
+export type WPTopic = WPContent & {
+  acfTopics: Nullable<WPAcfTopics>;
+};
+
+export type WPTopicPreview = Pick<
+  WPTopic,
+  'featuredImage' | 'slug' | 'title'
+> & {
+  databaseId: number;
+};
+
+//===========================================================================
+// Data from MDX files
+//===========================================================================
+
+export type MDXData = {
+  file: string;
+  image: MDXImage;
+};
+
+export type MDXImage = StaticImageData & {
+  alt: string;
+  title?: string;
+};
+
+export type MDXPageMeta = Omit<PageMeta, 'wordsCount'> & {
+  intro: string;
+  title: string;
+};
+
+export type MDXProjectMeta = Omit<ProjectMeta, 'wordsCount'> & {
+  intro: string;
+  title: string;
+};
+
+//===========================================================================
+// Data used in this application
+//===========================================================================
+
+export type Dates = {
+  publication: string;
+  update?: string;
+};
+
+export type SEO = {
+  description: string;
+  title: string;
+};
+
+export type Img = {
+  alt: string;
+  height: number;
+  src: string;
+  title?: string;
+  width: number;
+};
+
+export type CommentAuthor = {
+  avatar?: Omit<Img, 'title'>;
+  name: string;
+  website?: string;
+};
+
+export type CommentMeta = {
+  author: CommentAuthor;
+  date: string;
+};
+
+export type SingleComment = {
+  content: string;
+  id: number;
+  isApproved: boolean;
+  meta: CommentMeta;
+  parentId?: number;
+  replies: SingleComment[];
+};
+
+export type PageMeta = {
+  cover?: Img;
+  dates: Dates;
+  seo: SEO;
+  wordsCount: number;
+};
+
+export type Page = {
+  content: string;
+  intro: string;
+  slug: string;
+  title: string;
+};
+
+export type PageLink = {
+  id: number;
+  logo?: Img;
+  name: string;
+  url: string;
+};
+
+type ArticleMeta = PageMeta & {
+  author?: string;
+  commentsCount?: number;
+  thematics?: PageLink[];
+  topics?: PageLink[];
+};
+
+export type Article = Page & {
+  id: number;
+  meta: ArticleMeta;
+};
+
+export type ArticlePreview = Pick<Article, 'intro' | 'slug' | 'title'> & {
+  id: number;
+  meta: Omit<ArticleMeta, 'author' | 'seo' | 'topics'>;
+};
+
+export type RecentArticle = Pick<Article, 'slug' | 'title'> &
+  Pick<ArticleMeta, 'cover'> & {
+    id: number;
+    publicationDate: string;
+  };
+
+export type Repos = {
+  github?: string;
+  gitlab?: string;
+};
+
+export type ProjectMeta = Omit<PageMeta, 'wordsCount'> & {
+  license?: string;
+  repos?: Repos;
+  tagline?: string;
+  technologies?: string[];
+};
+
+export type Project = Omit<Page, 'content'> & {
+  id: string;
+  meta: ProjectMeta;
+};
+
+export type ProjectPreview = Omit<Project, 'meta'> & {
+  meta: Omit<ProjectMeta, 'license' | 'repos'>;
+};
+
+export type ThematicMeta = PageMeta & {
+  articles?: ArticlePreview[];
+  topics?: PageLink[];
+};
+
+export type Thematic = Page & {
+  meta: ThematicMeta;
+};
+
+export type TopicMeta = PageMeta & {
+  articles?: ArticlePreview[];
+  thematics?: PageLink[];
+  website?: string;
+};
+
+export type Topic = Page & {
+  meta: TopicMeta;
+};
diff --git a/src/types/gql.ts b/src/types/gql.ts
new file mode 100644
index 0000000..cec66c6
--- /dev/null
+++ b/src/types/gql.ts
@@ -0,0 +1,73 @@
+import type { WPCommentStatus } from './data';
+import type { Nullable } from './generics';
+
+export type GraphQLNode<T> = {
+  node: T;
+};
+
+export type GraphQLNodes<T> = {
+  nodes: T[];
+};
+
+export type GraphQLPageInfo = {
+  endCursor: Nullable<string>;
+  hasNextPage: boolean;
+  hasPreviousPage: boolean;
+  startCursor: Nullable<string>;
+  total: number;
+};
+
+export type GraphQLEdge<T> = GraphQLNode<T> & {
+  cursor: string;
+};
+
+export type GraphQLConnection<T> = {
+  edges: GraphQLEdge<T>[];
+  pageInfo: GraphQLPageInfo;
+};
+
+export type GraphQLEdgesInput = {
+  after?: Nullable<string>;
+  before?: Nullable<string>;
+  first?: number;
+  last?: number;
+};
+
+export type GraphQLOrder = 'ASC' | 'DESC';
+
+export type GraphQLCommentWhere = {
+  contentId?: number;
+  contentName?: string;
+  status?: WPCommentStatus;
+};
+
+type GraphQLPostFieldOrder =
+  | 'AUTHOR'
+  | 'COMMENT_COUNT'
+  | 'DATE'
+  | 'MODIFIED'
+  | 'SLUG'
+  | 'TITLE';
+
+export type GraphQLPostOrderBy = {
+  field: GraphQLPostFieldOrder;
+  order: GraphQLOrder;
+};
+
+export type GraphQLPostWhere = {
+  authorName?: string;
+  search?: string;
+  title?: string;
+};
+
+export type GraphQLTaxonomyFieldOrder = 'DATE' | 'MODIFIED' | 'SLUG' | 'TITLE';
+
+export type GraphQLTaxonomyOrderBy = {
+  field: GraphQLTaxonomyFieldOrder;
+  order: GraphQLOrder;
+};
+
+export type GraphQLTaxonomyWhere = {
+  search?: string;
+  title?: string;
+};
diff --git a/src/types/graphql/generics.ts b/src/types/graphql/generics.ts
deleted file mode 100644
index dec5f10..0000000
--- a/src/types/graphql/generics.ts
+++ /dev/null
@@ -1,25 +0,0 @@
-export type GraphQLPageInfo = {
-  endCursor: string;
-  hasNextPage: boolean;
-  total: number;
-};
-
-export type GraphQLEdges<T> = {
-  cursor: string;
-  node: T;
-};
-
-export type GraphQLEdgesInput = {
-  after?: string;
-  before?: string;
-  first?: number;
-  last?: number;
-};
-
-export type GraphQLNode<T> = {
-  node: T;
-};
-
-export type GraphQLNodes<T> = {
-  nodes: T[];
-};
diff --git a/src/types/graphql/index.ts b/src/types/graphql/index.ts
deleted file mode 100644
index 79eb05e..0000000
--- a/src/types/graphql/index.ts
+++ /dev/null
@@ -1,3 +0,0 @@
-export * from './generics';
-export * from './mutations';
-export * from './queries';
diff --git a/src/types/graphql/mutations.ts b/src/types/graphql/mutations.ts
deleted file mode 100644
index 6ff066c..0000000
--- a/src/types/graphql/mutations.ts
+++ /dev/null
@@ -1,60 +0,0 @@
-import { sendCommentMutation, sendMailMutation } from '../../services/graphql';
-
-//===========================================================================
-// Existing mutations list
-//===========================================================================
-
-export type Mutations = typeof sendMailMutation | typeof sendCommentMutation;
-
-//===========================================================================
-// Mutations response types
-//===========================================================================
-
-export type SendCommentResponse<T> = {
-  createComment: T;
-};
-
-export type SendMailResponse<T> = {
-  sendEmail: T;
-};
-
-export type MutationsResponseMap<T> = {
-  [sendCommentMutation]: SendCommentResponse<T>;
-  [sendMailMutation]: SendMailResponse<T>;
-};
-
-export type Approved = {
-  approved: boolean;
-};
-
-export type SentComment = {
-  clientMutationId: string;
-  success: boolean;
-  comment: Approved | null;
-};
-
-//===========================================================================
-// Mutations input types
-//===========================================================================
-
-export type SendCommentInput = {
-  author: string;
-  authorEmail: string;
-  authorUrl: string;
-  clientMutationId: string;
-  commentOn: number;
-  content: string;
-  parent?: number;
-};
-
-export type SendMailInput = {
-  body: string;
-  clientMutationId: string;
-  replyTo: string;
-  subject: string;
-};
-
-export type MutationsInputMap = {
-  [sendCommentMutation]: SendCommentInput;
-  [sendMailMutation]: SendMailInput;
-};
diff --git a/src/types/graphql/queries.ts b/src/types/graphql/queries.ts
deleted file mode 100644
index 83e9c67..0000000
--- a/src/types/graphql/queries.ts
+++ /dev/null
@@ -1,143 +0,0 @@
-import {
-  articleBySlugQuery,
-  articlesCardQuery,
-  articlesEndCursorQuery,
-  articlesQuery,
-  articlesSlugQuery,
-  commentsQuery,
-  thematicBySlugQuery,
-  thematicsListQuery,
-  thematicsSlugQuery,
-  topicBySlugQuery,
-  topicsListQuery,
-  topicsSlugQuery,
-  totalArticlesQuery,
-  totalThematicsQuery,
-  totalTopicsQuery,
-} from '../../services/graphql';
-import { Slug } from '../app';
-import { RawComment } from '../raw-data';
-import {
-  GraphQLEdges,
-  GraphQLEdgesInput,
-  GraphQLNodes,
-  GraphQLPageInfo,
-} from './generics';
-
-//===========================================================================
-// Existing queries list
-//===========================================================================
-
-export type Queries =
-  | typeof articlesQuery
-  | typeof articleBySlugQuery
-  | typeof articlesCardQuery
-  | typeof articlesEndCursorQuery
-  | typeof articlesSlugQuery
-  | typeof commentsQuery
-  | typeof thematicBySlugQuery
-  | typeof thematicsListQuery
-  | typeof thematicsSlugQuery
-  | typeof topicBySlugQuery
-  | typeof topicsListQuery
-  | typeof topicsSlugQuery
-  | typeof totalArticlesQuery
-  | typeof totalThematicsQuery
-  | typeof totalTopicsQuery;
-
-//===========================================================================
-// Queries response types
-//===========================================================================
-
-export type ArticleResponse<T> = {
-  post: T;
-};
-
-export type ArticlesResponse<T> = {
-  posts: T;
-};
-
-export type CommentsResponse<T> = {
-  comments: T;
-};
-
-export type ThematicResponse<T> = {
-  thematic: T;
-};
-
-export type ThematicsResponse<T> = {
-  thematics: T;
-};
-
-export type TopicResponse<T> = {
-  topic: T;
-};
-
-export type TopicsResponse<T> = {
-  topics: T;
-};
-
-export type EdgesResponse<T> = {
-  edges: GraphQLEdges<T>[];
-  pageInfo: GraphQLPageInfo;
-};
-
-export type EndCursorResponse = {
-  pageInfo: Pick<GraphQLPageInfo, 'endCursor'>;
-};
-
-export type QueriesResponseMap<T> = {
-  [articleBySlugQuery]: ArticleResponse<T>;
-  [articlesCardQuery]: ArticlesResponse<GraphQLNodes<T>>;
-  [articlesEndCursorQuery]: ArticlesResponse<EndCursorResponse>;
-  [articlesQuery]: ArticlesResponse<EdgesResponse<T>>;
-  [articlesSlugQuery]: ArticlesResponse<EdgesResponse<T>>;
-  [commentsQuery]: CommentsResponse<EdgesResponse<T>>;
-  [thematicBySlugQuery]: ThematicResponse<T>;
-  [thematicsListQuery]: ThematicsResponse<EdgesResponse<T>>;
-  [thematicsSlugQuery]: ThematicsResponse<EdgesResponse<T>>;
-  [topicBySlugQuery]: TopicResponse<T>;
-  [topicsListQuery]: TopicsResponse<EdgesResponse<T>>;
-  [topicsSlugQuery]: TopicsResponse<EdgesResponse<T>>;
-  [totalArticlesQuery]: ArticlesResponse<T>;
-  [totalThematicsQuery]: ThematicsResponse<T>;
-  [totalTopicsQuery]: TopicsResponse<T>;
-};
-
-//===========================================================================
-// Queries input types
-//===========================================================================
-
-export type QueryEdges = Pick<GraphQLEdgesInput, 'after' | 'first'>;
-
-export type ContentId = {
-  contentId: number;
-};
-
-export type Search = {
-  search?: string;
-};
-
-export type QueriesInputMap = {
-  [articleBySlugQuery]: Slug;
-  [articlesCardQuery]: QueryEdges & Search;
-  [articlesEndCursorQuery]: QueryEdges & Search;
-  [articlesQuery]: QueryEdges & Search;
-  [articlesSlugQuery]: QueryEdges & Search;
-  [commentsQuery]: ContentId & QueryEdges;
-  [thematicBySlugQuery]: Slug;
-  [thematicsListQuery]: QueryEdges & Search;
-  [thematicsSlugQuery]: QueryEdges & Search;
-  [topicBySlugQuery]: Slug;
-  [topicsListQuery]: QueryEdges & Search;
-  [topicsSlugQuery]: QueryEdges & Search;
-  [totalArticlesQuery]: Search;
-  [totalThematicsQuery]: null;
-  [totalTopicsQuery]: null;
-};
-
-export type CommentPage = {
-  comments: RawComment[];
-  hasNextPage: boolean;
-  endCursor: string;
-};
diff --git a/src/types/index.ts b/src/types/index.ts
index e2f0f55..d6e4a6a 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -1,6 +1,5 @@
 export * from './app';
+export * from './data';
 export * from './generics';
-export * from './graphql';
-export * from './mdx';
-export * from './raw-data';
+export * from './gql';
 export * from './swr';
diff --git a/src/types/mdx.ts b/src/types/mdx.ts
deleted file mode 100644
index 7645ce6..0000000
--- a/src/types/mdx.ts
+++ /dev/null
@@ -1,22 +0,0 @@
-import { StaticImageData } from 'next/image';
-import { Meta } from './app';
-
-export type MDXData = {
-  file: string;
-  image: MDXImage;
-};
-
-export type MDXImage = StaticImageData & {
-  alt: string;
-  title?: string;
-};
-
-export type MDXPageMeta = Pick<Meta<'page'>, 'cover' | 'dates' | 'seo'> & {
-  intro: string;
-  title: string;
-};
-
-export type MDXProjectMeta = Exclude<Meta<'project'>, 'wordsCount'> & {
-  intro: string;
-  title: string;
-};
diff --git a/src/types/raw-data.ts b/src/types/raw-data.ts
deleted file mode 100644
index 022016e..0000000
--- a/src/types/raw-data.ts
+++ /dev/null
@@ -1,111 +0,0 @@
-/**
- * Types for raw data coming from GraphQL API.
- */
-
-import { ContentKind } from './app';
-import { GraphQLNode, GraphQLPageInfo } from './graphql/generics';
-
-export type ACFPosts = {
-  postsInThematic?: RawThematicPreview[];
-  postsInTopic?: RawTopicPreview[];
-};
-
-export type ACFThematics = {
-  postsInThematic: RawArticle[];
-};
-
-export type ACFTopics = {
-  officialWebsite: string;
-  postsInTopic: RawArticle[];
-};
-
-export type ContentParts = {
-  afterMore: string;
-  beforeMore: string;
-};
-
-export type Info = {
-  wordsCount: number;
-};
-
-export type RawAuthor<T extends ContentKind> = {
-  description?: T extends 'comment' ? never : string;
-  gravatarUrl?: string;
-  name: string;
-  url?: string;
-};
-
-export type RawComment = {
-  approved: boolean;
-  author: GraphQLNode<RawAuthor<'comment'>>;
-  content: string;
-  databaseId: number;
-  date: string;
-  parentDatabaseId: number;
-};
-
-export type RawCommentsPage = {
-  comments: RawComment[];
-  hasNextPage: boolean;
-  endCursor: string;
-};
-
-export type RawCover = {
-  altText: string;
-  mediaDetails: {
-    width: number;
-    height: number;
-  };
-  sourceUrl: string;
-  title?: string;
-};
-
-export type RawArticle = RawPage & {
-  acfPosts: ACFPosts;
-  commentCount: number | null;
-};
-
-export type RawArticlePreview = Pick<
-  RawArticle,
-  'databaseId' | 'date' | 'featuredImage' | 'slug' | 'title'
->;
-
-export type RawPage = {
-  author?: GraphQLNode<RawAuthor<'page'>>;
-  contentParts: ContentParts;
-  databaseId: number;
-  date: string;
-  featuredImage: GraphQLNode<RawCover> | null;
-  info: Info;
-  modified: string;
-  seo?: RawSEO;
-  slug: string;
-  title: string;
-};
-
-export type RawSEO = {
-  metaDesc: string;
-  title: string;
-};
-
-export type RawThematic = RawPage & {
-  acfThematics: ACFThematics;
-};
-
-export type RawThematicPreview = Pick<
-  RawThematic,
-  'databaseId' | 'featuredImage' | 'slug' | 'title'
->;
-
-export type RawTopic = RawPage & {
-  acfTopics: ACFTopics;
-};
-
-export type RawTopicPreview = Pick<
-  RawTopic,
-  'databaseId' | 'featuredImage' | 'slug' | 'title'
->;
-
-export type TotalItems = {
-  pageInfo: Pick<GraphQLPageInfo, 'total'>;
-};
diff --git a/src/utils/helpers/author.ts b/src/utils/helpers/author.ts
deleted file mode 100644
index a5e9bc6..0000000
--- a/src/utils/helpers/author.ts
+++ /dev/null
@@ -1,31 +0,0 @@
-import { type Author, type ContentKind, type RawAuthor } from '../../types';
-
-/**
- * Convert author raw data to regular data.
- *
- * @param {RawAuthor<ContentKind>} data - The author raw data.
- * @param {ContentKind} kind - The author kind. Either `page` or `comment`.
- * @param {number} [avatarSize] - The author avatar size.
- * @returns {Author<ContentKind>} The author data.
- */
-export const getAuthorFromRawData = (
-  data: RawAuthor<typeof kind>,
-  kind: ContentKind,
-  avatarSize: number = 80
-): Author<typeof kind> => {
-  const { name, description, gravatarUrl, url } = data;
-
-  return {
-    name,
-    avatar: gravatarUrl
-      ? {
-          alt: `${name} avatar`,
-          height: avatarSize,
-          src: gravatarUrl,
-          width: avatarSize,
-        }
-      : undefined,
-    description,
-    website: url,
-  };
-};
diff --git a/src/utils/helpers/graphql.ts b/src/utils/helpers/graphql.ts
new file mode 100644
index 0000000..e07b151
--- /dev/null
+++ b/src/utils/helpers/graphql.ts
@@ -0,0 +1,64 @@
+import type { Nullable } from '../../types';
+import { CONFIG } from '../config';
+
+/**
+ * Retrieve the API url from settings.
+ *
+ * @returns {string} The API url.
+ */
+export const getGraphQLUrl = (): string => {
+  if (!CONFIG.api.url) throw new Error('You forgot to define the API url.');
+
+  return CONFIG.api.url;
+};
+
+export type GraphQLData<T> = Record<string, Nullable<T>>;
+
+type GraphQLResponse<T extends GraphQLData<unknown>> = {
+  data: T;
+  errors?: { message: string }[];
+};
+
+export type FetchGraphQLConfig = {
+  query: string;
+  url: string;
+  variables?: Record<string, unknown>;
+};
+
+/**
+ * Retrieve GraphQL data using fetch.
+ *
+ * @template T - The expected data type.
+ * @param {FetchGraphQLConfig} config - A configuration object.
+ * @returns {Promise<T>} The data.
+ */
+export const fetchGraphQL = async <
+  T extends GraphQLData<unknown> = GraphQLData<unknown>,
+>({
+  query,
+  url,
+  variables,
+}: FetchGraphQLConfig): Promise<T> => {
+  const response = await fetch(url, {
+    method: 'POST',
+    headers: {
+      'content-type': 'application/json;charset=UTF-8',
+    },
+    body: JSON.stringify({
+      query,
+      variables,
+    }),
+  });
+
+  const { data, errors }: GraphQLResponse<T> = await response.json();
+
+  if (!response.ok) {
+    const error = new Error(
+      errors?.map((e) => e.message).join('\n') ?? 'Network response was not OK'
+    );
+
+    return Promise.reject(error);
+  }
+
+  return data;
+};
diff --git a/src/utils/helpers/images.ts b/src/utils/helpers/images.ts
deleted file mode 100644
index 6e0c2c5..0000000
--- a/src/utils/helpers/images.ts
+++ /dev/null
@@ -1,17 +0,0 @@
-import { type Image, type RawCover } from '../../types';
-
-/**
- * Retrieve an Image object from raw data.
- *
- * @param image - The cover raw data.
- * @returns {Image} - An Image object.
- */
-export const getImageFromRawData = (image: RawCover): Image => {
-  return {
-    alt: image.altText,
-    height: image.mediaDetails.height,
-    src: image.sourceUrl,
-    title: image.title,
-    width: image.mediaDetails.width,
-  };
-};
diff --git a/src/utils/helpers/index.ts b/src/utils/helpers/index.ts
index 92f9424..94fde45 100644
--- a/src/utils/helpers/index.ts
+++ b/src/utils/helpers/index.ts
@@ -1,5 +1,4 @@
-export * from './author';
-export * from './images';
+export * from './graphql';
 export * from './pages';
 export * from './reading-time';
 export * from './refs';
diff --git a/src/utils/helpers/pages.tsx b/src/utils/helpers/pages.tsx
index 7b6bdca..9e015db 100644
--- a/src/utils/helpers/pages.tsx
+++ b/src/utils/helpers/pages.tsx
@@ -1,43 +1,7 @@
 import NextImage from 'next/image';
 import type { LinksWidgetItemData, PostData } from '../../components';
-import { getArticleFromRawData } from '../../services/graphql';
-import type {
-  Article,
-  EdgesResponse,
-  PageLink,
-  RawArticle,
-  RawThematicPreview,
-  RawTopicPreview,
-} from '../../types';
+import type { ArticlePreview, PageLink } from '../../types';
 import { ROUTES } from '../constants';
-import { getImageFromRawData } from './images';
-
-/**
- * Convert raw data to a Link object.
- *
- * @param data - An object.
- * @param {number} data.databaseId - The data id.
- * @param {number} [data.logo] - The data logo.
- * @param {string} data.slug - The data slug.
- * @param {string} data.title - The data name.
- * @returns {PageLink} The link data (id, slug and title).
- */
-export const getPageLinkFromRawData = (
-  data: RawThematicPreview | RawTopicPreview,
-  kind: 'thematic' | 'topic'
-): PageLink => {
-  const { databaseId, featuredImage, slug, title } = data;
-  const baseUrl = `${
-    kind === 'thematic' ? ROUTES.THEMATICS.INDEX : ROUTES.TOPICS
-  }/`;
-
-  return {
-    id: databaseId,
-    logo: featuredImage ? getImageFromRawData(featuredImage.node) : undefined,
-    name: title,
-    url: `${baseUrl}${slug}`,
-  };
-};
 
 /**
  * Method to sort PageLink objects by name.
@@ -73,55 +37,28 @@ export const getLinksItemData = (links: PageLink[]): LinksWidgetItemData[] =>
 /**
  * Retrieve the posts list with the article URL.
  *
- * @param {Article[]} posts - An array of articles.
+ * @param {ArticlePreview[]} posts - An array of articles.
  * @returns {PostData[]} An array of posts with full article URL.
  */
-export const getPostsWithUrl = (posts: Article[]): PostData[] =>
-  posts.map(({ intro, meta, slug, title, ...post }) => {
+export const getPostsWithUrl = (posts: ArticlePreview[]): PostData[] =>
+  posts.map(({ id, intro, meta, slug, title, ...post }) => {
     return {
       ...post,
       cover: meta.cover ? <NextImage {...meta.cover} /> : undefined,
       excerpt: intro,
       heading: title,
+      id,
       meta: {
         publicationDate: meta.dates.publication,
         updateDate: meta.dates.update,
         wordsCount: meta.wordsCount,
-        author: meta.author?.name,
         thematics: meta.thematics,
-        topics: meta.topics,
-        comments:
-          meta.commentsCount === undefined
-            ? undefined
-            : {
-                count: meta.commentsCount,
-                postHeading: title,
-                url: `${ROUTES.ARTICLE}/${slug}#comments`,
-              },
+        comments: {
+          count: meta.commentsCount ?? 0,
+          postHeading: title,
+          url: `${ROUTES.ARTICLE}/${slug}#comments`,
+        },
       },
       url: `${ROUTES.ARTICLE}/${slug}`,
     };
   });
-
-/**
- * Retrieve the posts list from raw data.
- *
- * @param {EdgesResponse<RawArticle>[]} rawData - The raw data.
- * @returns {PostData[]} An array of posts.
- */
-export const getPostsList = async (
-  rawData: EdgesResponse<RawArticle>[]
-): Promise<PostData[]> => {
-  const articlesList: RawArticle[] = [];
-  rawData.forEach((articleData) => {
-    articleData.edges.forEach((edge) => {
-      articlesList.push(edge.node);
-    });
-  });
-
-  return getPostsWithUrl(
-    await Promise.all(
-      articlesList.map(async (article) => getArticleFromRawData(article))
-    )
-  );
-};
diff --git a/src/utils/helpers/rss.ts b/src/utils/helpers/rss.ts
index d9c3b1e..82fa1ee 100644
--- a/src/utils/helpers/rss.ts
+++ b/src/utils/helpers/rss.ts
@@ -1,28 +1,25 @@
 import { Feed } from 'feed';
 import {
-  getArticleFromRawData,
-  getArticles,
-  getTotalArticles,
+  convertPostPreviewToArticlePreview,
+  fetchPostsList,
+  fetchPostsCount,
 } from '../../services/graphql';
-import type { Article } from '../../types';
+import type { ArticlePreview } from '../../types';
 import { CONFIG } from '../config';
 import { ROUTES } from '../constants';
 
 /**
  * Retrieve the data for all the articles.
  *
- * @returns {Promise<Article[]>} - All the articles.
+ * @returns {Promise<ArticlePreview[]>} - All the articles.
  */
-const getAllArticles = async (): Promise<Article[]> => {
-  const totalArticles = await getTotalArticles();
-  const rawArticles = await getArticles({ first: totalArticles });
-  const articles: Article[] = [];
+const getAllArticles = async (): Promise<ArticlePreview[]> => {
+  const totalPosts = await fetchPostsCount();
+  const posts = await fetchPostsList({ first: totalPosts });
 
-  rawArticles.edges.forEach(async (edge) => {
-    articles.push(await getArticleFromRawData(edge.node));
-  });
-
-  return articles;
+  return posts.edges.map((edge) =>
+    convertPostPreviewToArticlePreview(edge.node)
+  );
 };
 
 /**
diff --git a/src/utils/helpers/server/projects.ts b/src/utils/helpers/server/projects.ts
index ed73da8..c1a3d10 100644
--- a/src/utils/helpers/server/projects.ts
+++ b/src/utils/helpers/server/projects.ts
@@ -1,10 +1,6 @@
 import { readdirSync } from 'fs';
 import path from 'path';
-import {
-  type MDXProjectMeta,
-  type ProjectCard,
-  type ProjectPreview,
-} from '../../../types';
+import type { MDXProjectMeta, Project, ProjectPreview } from '../../../types';
 
 /**
  * Retrieve all the projects filename.
@@ -24,9 +20,7 @@ export const getProjectFilenames = (): string[] => {
  * @param {string} filename - The project filename.
  * @returns {Promise<ProjectPreview>}
  */
-export const getProjectData = async (
-  filename: string
-): Promise<ProjectPreview> => {
+export const getProjectData = async (filename: string): Promise<Project> => {
   try {
     const {
       meta,
@@ -53,7 +47,7 @@ export const getProjectData = async (
         },
       },
       slug: filename,
-      title: title,
+      title,
     };
   } catch (err) {
     console.error(err);
@@ -65,28 +59,24 @@ export const getProjectData = async (
  * Retrieve all the projects data using filenames.
  *
  * @param {string[]} filenames - The filenames without extension.
- * @returns {Promise<ProjectCard[]>} - An array of projects data.
+ * @returns {Promise<ProjectPreview[]>} - An array of projects data.
  */
 export const getProjectsData = async (
   filenames: string[]
-): Promise<ProjectCard[]> => {
-  return Promise.all(
-    filenames.map(async (filename) => {
-      const { id, meta, slug, title } = await getProjectData(filename);
-      const { cover, dates, tagline, technologies } = meta;
-      return { id, meta: { cover, dates, tagline, technologies }, slug, title };
-    })
-  );
-};
+): Promise<ProjectPreview[]> =>
+  Promise.all(filenames.map(async (filename) => getProjectData(filename)));
 
 /**
  * Method to sort an array of projects by publication date.
  *
- * @param {ProjectCard} a - A single project.
- * @param {ProjectCard} b - A single project.
+ * @param {ProjectPreview} a - A single project.
+ * @param {ProjectPreview} b - A single project.
  * @returns The result used by Array.sort() method: 1 || -1 || 0.
  */
-const sortProjectsByPublicationDate = (a: ProjectCard, b: ProjectCard) => {
+const sortProjectsByPublicationDate = (
+  a: ProjectPreview,
+  b: ProjectPreview
+) => {
   if (a.meta.dates.publication < b.meta.dates.publication) return 1;
   if (a.meta.dates.publication > b.meta.dates.publication) return -1;
   return 0;
@@ -95,9 +85,9 @@ const sortProjectsByPublicationDate = (a: ProjectCard, b: ProjectCard) => {
 /**
  * Retrieve all projects in content folder sorted by publication date.
  *
- * @returns {Promise<ProjectCard[]>} An array of projects.
+ * @returns {Promise<ProjectPreview[]>} An array of projects.
  */
-export const getProjectsCard = async (): Promise<ProjectCard[]> => {
+export const getProjectsCard = async (): Promise<ProjectPreview[]> => {
   const filenames = getProjectFilenames();
   const projects = await getProjectsData(filenames);
 
diff --git a/src/utils/hooks/use-article.ts b/src/utils/hooks/use-article.ts
index f339f7f..5e54ee4 100644
--- a/src/utils/hooks/use-article.ts
+++ b/src/utils/hooks/use-article.ts
@@ -1,11 +1,7 @@
 import { useEffect, useState } from 'react';
 import useSWR from 'swr';
-import {
-  articleBySlugQuery,
-  fetchAPI,
-  getArticleFromRawData,
-} from '../../services/graphql';
-import type { Article, Maybe, RawArticle } from '../../types';
+import { convertPostToArticle, fetchPost } from '../../services/graphql';
+import type { Article, Maybe } from '../../types';
 
 export type UseArticleConfig = {
   /**
@@ -28,24 +24,12 @@ export const useArticle = ({
   slug,
   fallback,
 }: UseArticleConfig): Article | undefined => {
-  const { data } = useSWR(
-    slug ? { query: articleBySlugQuery, variables: { slug } } : null,
-    fetchAPI<RawArticle, typeof articleBySlugQuery>,
-    {}
-  );
-  const [article, setArticle] = useState<Maybe<Article>>();
+  const { data } = useSWR(slug, fetchPost, {});
+  const [article, setArticle] = useState<Maybe<Article>>(fallback);
 
   useEffect(() => {
-    const getArticle = async () => {
-      if (data) {
-        setArticle(await getArticleFromRawData(data.post));
-      } else {
-        setArticle(fallback);
-      }
-    };
-
-    getArticle();
-  }, [data, fallback]);
+    if (data) convertPostToArticle(data).then((post) => setArticle(post));
+  }, [data]);
 
   return article;
 };
diff --git a/src/utils/hooks/use-comments.ts b/src/utils/hooks/use-comments.ts
index ac723e9..94a2d7e 100644
--- a/src/utils/hooks/use-comments.ts
+++ b/src/utils/hooks/use-comments.ts
@@ -1,9 +1,13 @@
 import useSWR from 'swr';
-import { getAllComments } from '../../services/graphql';
+import {
+  type FetchCommentsListInput,
+  fetchCommentsList,
+  convertWPCommentToComment,
+  buildCommentsTree,
+} from '../../services/graphql';
 import type { SingleComment } from '../../types';
 
-export type UseCommentsConfig = {
-  contentId?: string | number;
+export type UseCommentsConfig = FetchCommentsListInput & {
   fallback?: SingleComment[];
 };
 
@@ -14,10 +18,15 @@ export type UseCommentsConfig = {
  * @returns {SingleComment[]|undefined}
  */
 export const useComments = ({
-  contentId,
   fallback,
+  ...input
 }: UseCommentsConfig): SingleComment[] | undefined => {
-  const { data } = useSWR(contentId ? { contentId } : null, getAllComments, {});
+  const { data } = useSWR(input, fetchCommentsList, {});
 
-  return data ?? fallback;
+  if (!data) return fallback;
+
+  const comments = data.map(convertWPCommentToComment);
+  const commentsTree = buildCommentsTree(comments);
+
+  return commentsTree;
 };
diff --git a/src/utils/hooks/use-pagination/use-pagination.test.ts b/src/utils/hooks/use-pagination/use-pagination.test.ts
index 20cb37e..18f3ac5 100644
--- a/src/utils/hooks/use-pagination/use-pagination.test.ts
+++ b/src/utils/hooks/use-pagination/use-pagination.test.ts
@@ -1,8 +1,11 @@
 import { beforeEach, describe, expect, it, jest } from '@jest/globals';
 import { act, renderHook, waitFor } from '@testing-library/react';
 import { getConnection } from '../../../../tests/utils/graphql';
-import type { EdgesResponse, GraphQLEdgesInput, Search } from '../../../types';
-import { usePagination } from './use-pagination';
+import type { GraphQLConnection } from '../../../types';
+import {
+  type UsePaginationFetcherInput,
+  usePagination,
+} from './use-pagination';
 
 type Data = {
   id: number;
@@ -24,7 +27,7 @@ describe('usePagination', () => {
       after,
       first,
       search,
-    }: GraphQLEdgesInput & Search): Promise<EdgesResponse<Data>> => {
+    }: UsePaginationFetcherInput): Promise<GraphQLConnection<Data>> => {
       const filteredData = search
         ? data.filter((d) => d.title.includes(search))
         : data;
diff --git a/src/utils/hooks/use-pagination/use-pagination.ts b/src/utils/hooks/use-pagination/use-pagination.ts
index 4df521b..2a40aa4 100644
--- a/src/utils/hooks/use-pagination/use-pagination.ts
+++ b/src/utils/hooks/use-pagination/use-pagination.ts
@@ -1,22 +1,25 @@
 import { useCallback } from 'react';
 import useSWRInfinite, { type SWRInfiniteKeyLoader } from 'swr/infinite';
 import type {
-  EdgesResponse,
+  GraphQLConnection,
   GraphQLEdgesInput,
   Maybe,
   Nullable,
-  Search,
 } from '../../../types';
 
+export type UsePaginationFetcherInput = GraphQLEdgesInput & {
+  search?: string;
+};
+
 export type UsePaginationConfig<T> = {
   /**
    * The initial data.
    */
-  fallback?: EdgesResponse<T>[];
+  fallback?: GraphQLConnection<T>[];
   /**
    * A function to fetch more data.
    */
-  fetcher: (props: GraphQLEdgesInput & Search) => Promise<EdgesResponse<T>>;
+  fetcher: (props: UsePaginationFetcherInput) => Promise<GraphQLConnection<T>>;
   /**
    * The number of results per page.
    */
@@ -31,7 +34,7 @@ export type UsePaginationReturn<T> = {
   /**
    * The data from the API.
    */
-  data: Maybe<EdgesResponse<T>[]>;
+  data: Maybe<GraphQLConnection<T>[]>;
   /**
    * An error thrown by fetcher.
    */
@@ -88,8 +91,8 @@ export const usePagination = <T>({
   perPage,
   searchQuery,
 }: UsePaginationConfig<T>): UsePaginationReturn<T> => {
-  const getKey: SWRInfiniteKeyLoader<EdgesResponse<T>> = useCallback(
-    (pageIndex, previousPageData): Nullable<GraphQLEdgesInput & Search> => {
+  const getKey: SWRInfiniteKeyLoader<GraphQLConnection<T>> = useCallback(
+    (pageIndex, previousPageData): Nullable<UsePaginationFetcherInput> => {
       if (previousPageData && !previousPageData.edges.length) return null;
 
       return {
diff --git a/src/utils/hooks/use-posts-list/use-posts-list.test.ts b/src/utils/hooks/use-posts-list/use-posts-list.test.ts
index 1d11111..ff69de2 100644
--- a/src/utils/hooks/use-posts-list/use-posts-list.test.ts
+++ b/src/utils/hooks/use-posts-list/use-posts-list.test.ts
@@ -1,13 +1,13 @@
 import { describe, expect, it } from '@jest/globals';
 import { act, renderHook } from '@testing-library/react';
-import { getArticles } from '../../../services/graphql';
+import { fetchPostsList } from '../../../services/graphql';
 import { usePostsList } from './use-posts-list';
 
 describe('usePostsList', () => {
   it('can return the first new result index when loading more posts', async () => {
     const perPage = 5;
     const { result } = renderHook(() =>
-      usePostsList({ fetcher: getArticles, perPage })
+      usePostsList({ fetcher: fetchPostsList, perPage })
     );
 
     expect.assertions(2);
diff --git a/src/utils/hooks/use-posts-list/use-posts-list.ts b/src/utils/hooks/use-posts-list/use-posts-list.ts
index 980d531..bb77f31 100644
--- a/src/utils/hooks/use-posts-list/use-posts-list.ts
+++ b/src/utils/hooks/use-posts-list/use-posts-list.ts
@@ -1,29 +1,34 @@
-import { useCallback, useEffect, useState } from 'react';
-import type { PostData } from '../../../components';
-import type { Maybe, RawArticle } from '../../../types';
-import { getPostsList } from '../../helpers';
+import { useCallback, useState } from 'react';
+import type {
+  ArticlePreview,
+  GraphQLConnection,
+  GraphQLEdge,
+  Maybe,
+  WPPostPreview,
+} from '../../../types';
 import {
   type UsePaginationConfig,
   usePagination,
   type UsePaginationReturn,
 } from '../use-pagination';
+import { convertPostPreviewToArticlePreview } from 'src/services/graphql';
 
 export type usePostsListReturn = Omit<
-  UsePaginationReturn<RawArticle>,
+  UsePaginationReturn<WPPostPreview>,
   'data'
 > & {
   /**
-   * The index of the first new result when loading more posts.
+   * The articles list.
    */
-  firstNewResultIndex: Maybe<number>;
+  articles: Maybe<GraphQLConnection<ArticlePreview>[]>;
   /**
-   * The posts list.
+   * The index of the first new result when loading more posts.
    */
-  posts: Maybe<PostData[]>;
+  firstNewResultIndex: Maybe<number>;
 };
 
 export const usePostsList = (
-  config: UsePaginationConfig<RawArticle>
+  config: UsePaginationConfig<WPPostPreview>
 ): usePostsListReturn => {
   const {
     data,
@@ -40,15 +45,6 @@ export const usePostsList = (
   } = usePagination(config);
   const [firstNewResultIndex, setFirstNewResultIndex] =
     useState<Maybe<number>>(undefined);
-  const [posts, setPosts] = useState<Maybe<PostData[]>>(undefined);
-
-  useEffect(() => {
-    const getPosts = async () => {
-      if (data) setPosts(await getPostsList(data));
-    };
-
-    getPosts();
-  }, [data]);
 
   const handleLoadMore = useCallback(async () => {
     setFirstNewResultIndex(size * config.perPage + 1);
@@ -56,7 +52,22 @@ export const usePostsList = (
     await loadMore();
   }, [config.perPage, loadMore, size]);
 
+  const articles: Maybe<GraphQLConnection<ArticlePreview>[]> = data?.map(
+    (page): GraphQLConnection<ArticlePreview> => {
+      return {
+        edges: page.edges.map((edge): GraphQLEdge<ArticlePreview> => {
+          return {
+            cursor: edge.cursor,
+            node: convertPostPreviewToArticlePreview(edge.node),
+          };
+        }),
+        pageInfo: page.pageInfo,
+      };
+    }
+  );
+
   return {
+    articles,
     error,
     firstNewResultIndex,
     hasNextPage,
@@ -67,7 +78,6 @@ export const usePostsList = (
     isRefreshing,
     isValidating,
     loadMore: handleLoadMore,
-    posts,
     size,
   };
 };
diff --git a/tests/utils/graphql/connections.ts b/tests/utils/graphql/connections.ts
index f38fa59..dc4bfc6 100644
--- a/tests/utils/graphql/connections.ts
+++ b/tests/utils/graphql/connections.ts
@@ -1,4 +1,9 @@
-import type { EdgesResponse, GraphQLEdges, Maybe } from '../../../src/types';
+import type {
+  GraphQLConnection,
+  GraphQLEdge,
+  Maybe,
+  Nullable,
+} from '../../../src/types';
 import { CONFIG } from '../../../src/utils/config';
 
 /**
@@ -8,7 +13,7 @@ import { CONFIG } from '../../../src/utils/config';
  * @param {number} offset - The offset.
  * @returns {Array<Edge<T>>} The edges.
  */
-export const getEdges = <T>(data: T[], offset: number): GraphQLEdges<T>[] =>
+export const getEdges = <T>(data: T[], offset: number): GraphQLEdge<T>[] =>
   data.map((singleData, index) => {
     const currentItemNumber = index + 1;
 
@@ -21,7 +26,7 @@ export const getEdges = <T>(data: T[], offset: number): GraphQLEdges<T>[] =>
 type GetConnectionProps<T> = {
   data: Maybe<T[]>;
   first: Maybe<number>;
-  after: Maybe<string>;
+  after: Maybe<Nullable<string>>;
 };
 
 /**
@@ -37,7 +42,7 @@ export const getConnection = <T>({
   after,
   data = [],
   first = CONFIG.postsPerPage,
-}: GetConnectionProps<T>): EdgesResponse<T> => {
+}: GetConnectionProps<T>): GraphQLConnection<T> => {
   const afterInt = after ? Number(after.replace('cursor', '')) : 0;
   const edges = getEdges(data.slice(afterInt, afterInt + first), afterInt);
   const endCursor =
@@ -47,7 +52,9 @@ export const getConnection = <T>({
     edges,
     pageInfo: {
       endCursor,
+      hasPreviousPage: typeof after !== 'undefined',
       hasNextPage: data.length - afterInt > first,
+      startCursor: after ?? 'cursor1',
       total: data.length,
     },
   };