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import { Feed } from 'feed';
import {
convertPostPreviewToArticlePreview,
fetchPostsList,
fetchPostsCount,
} from '../../services/graphql';
import type { ArticlePreview } from '../../types';
import { CONFIG } from '../config';
import { ROUTES } from '../constants';
/**
* Retrieve the data for all the articles.
*
* @returns {Promise<ArticlePreview[]>} All the articles.
*/
const getAllArticles = async (): Promise<ArticlePreview[]> => {
const totalPosts = await fetchPostsCount();
const posts = await fetchPostsList({ first: totalPosts });
return posts.edges.map((edge) =>
convertPostPreviewToArticlePreview(edge.node)
);
};
/**
* Generate a new feed.
*
* @returns {Promise<Feed>} The feed.
*/
export const generateFeed = async (): Promise<Feed> => {
const author = {
name: CONFIG.name,
email: process.env.APP_AUTHOR_EMAIL,
link: CONFIG.url,
};
const copyright = `\u00A9 ${CONFIG.copyright.startYear} - ${CONFIG.copyright.endYear} ${CONFIG.name} - CC BY SA`;
const title = `${CONFIG.name} | ${CONFIG.baseline}`;
const feed = new Feed({
author,
copyright,
description: process.env.APP_FEED_DESCRIPTION,
favicon: `${CONFIG.url}/favicon.ico`,
feedLinks: {
json: `${CONFIG.url}${ROUTES.RSS}.json`,
atom: `${CONFIG.url}${ROUTES.RSS}/atom`,
},
generator: 'Feed & NextJS',
id: CONFIG.url,
language: CONFIG.locales.defaultLocale,
link: CONFIG.url,
title,
});
const articles = await getAllArticles();
for (const article of articles) {
feed.addItem({
author: [author],
category: article.meta.thematics?.map((thematic) => {
return {
domain: `${CONFIG.url}${thematic.url}`,
name: thematic.name,
};
}),
content: article.intro,
copyright,
date: new Date(
article.meta.dates.update ?? article.meta.dates.publication
),
description: article.intro,
id: `${article.id}`,
image: article.meta.cover
? {
url: article.meta.cover.src,
}
: undefined,
link: `${CONFIG.url}${ROUTES.ARTICLE}/${article.slug}`,
published: new Date(article.meta.dates.publication),
title: article.title,
});
}
return feed;
};
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