1 files changed, 104 insertions, 0 deletions
diff --git a/src/services/graphql/articles.ts b/src/services/graphql/articles.ts
new file mode 100644
index 0000000..e5ce7a5
--- /dev/null
+++ b/src/services/graphql/articles.ts
@@ -0,0 +1,104 @@
+import { Article } from '@ts/types/app';
+import { RawArticle, TotalItems } from '@ts/types/raw-data';
+import { getAuthorFromRawData } from '@utils/helpers/author';
+import { getImageFromRawData } from '@utils/helpers/images';
+import { getPageLinkFromRawData } from '@utils/helpers/pages';
+import { EdgesVars, fetchAPI, getAPIUrl, PageInfo } from './api';
+import { articlesQuery, totalArticlesQuery } from './articles.query';
+
+/**
+ * Retrieve the total number of articles.
+ *
+ * @returns {Promise<number>} - The articles total number.
+ */
+export const getTotalArticles = async (): Promise<number> => {
+  const response = await fetchAPI<TotalItems, typeof totalArticlesQuery>({
+    api: getAPIUrl(),
+    query: totalArticlesQuery,
+  });
+
+  return response.posts.pageInfo.total;
+};
+
+export type GetArticlesReturn = {
+  articles: Article[];
+  pageInfo: PageInfo;
+};
+
+/**
+ * Convert raw data to an Article object.
+ *
+ * @param {RawArticle} data - The page raw data.
+ * @returns {Article} The page data.
+ */
+export const getArticleFromRawData = (data: RawArticle): Article => {
+  const {
+    acfPosts,
+    author,
+    commentCount,
+    contentParts,
+    databaseId,
+    date,
+    featuredImage,
+    info,
+    modified,
+    slug,
+    title,
+    seo,
+  } = data;
+
+  return {
+    content: contentParts.afterMore,
+    id: databaseId,
+    intro: contentParts.beforeMore,
+    meta: {
+      author: getAuthorFromRawData(author.node, 'page'),
+      commentsCount: commentCount || 0,
+      cover: featuredImage?.node
+        ? getImageFromRawData(featuredImage.node)
+        : undefined,
+      dates: {
+        publication: date,
+        update: modified,
+      },
+      readingTime: info.readingTime,
+      seo: {
+        description: seo?.metaDesc || '',
+        title: seo?.title || '',
+      },
+      thematics: acfPosts.postsInThematic?.map((thematic) =>
+        getPageLinkFromRawData(thematic)
+      ),
+      topics: acfPosts.postsInTopic?.map((topic) =>
+        getPageLinkFromRawData(topic)
+      ),
+      wordsCount: info.wordsCount,
+    },
+    slug,
+    title,
+  };
+};
+
+/**
+ * Retrieve the given number of articles from API.
+ *
+ * @param {EdgesVars} obj - An object.
+ * @param {number} obj.first - The number of articles.
+ * @returns {Promise<GetArticlesReturn>} - The articles data.
+ */
+export const getArticles = async ({
+  first,
+}: EdgesVars): Promise<GetArticlesReturn> => {
+  const response = await fetchAPI<RawArticle, typeof articlesQuery>({
+    api: getAPIUrl(),
+    query: articlesQuery,
+    variables: { first },
+  });
+
+  return {
+    articles: response.posts.edges.map((edge) =>
+      getArticleFromRawData(edge.node)
+    ),
+    pageInfo: response.posts.pageInfo,
+  };
+};