tningjs/sam-and-his-friends

/**
 * @module routes/single-post
 */

const { Router } = require('express');

const {
    singlePostFormatter,
} = require('../utils/formatters/single-post-formatter');
const { request } = require('../data/request');
const {
    fbCommonMetaTags,
    socialMedias,
    subCategories,
    twitterCommonMetaTags,
    defalutMetaTagImageSrcStr,
} = require('../utils/config');
const { DISCOURSE_RESOURCE_MAP } = require('../utils/constants');
const {
    activeUsersFormatter,
} = require('../utils/formatters/active-users-formatter');
const { addActiveUsersToCache } = require('../data/cache/active-users');

function getMetaTags(topicId, formattedSinglePost) {
    return [
        {
            type: 'og:type',
            content: 'article',
        },
        {
            type: 'og:url',
            content: `https://samandhisfriends.com/single-post/${topicId}`,
        },
        { type: 'og:title', content: formattedSinglePost.title },
        {
            type: 'og:description',
            content: formattedSinglePost.excerpt,
        },
        {
            type: 'og:image',
            content:
                (formattedSinglePost.heroImage &&
                    formattedSinglePost.heroImage.srcStr) ||
                defalutMetaTagImageSrcStr,
        },
        {
            type: 'twitter:title',
            content: formattedSinglePost.title,
        },
        {
            type: 'twitter:description',
            content: formattedSinglePost.excerpt,
        },
        {
            type: 'twitter:image',
            content:
                (formattedSinglePost.heroImage &&
                    formattedSinglePost.heroImage.srcStr) ||
                defalutMetaTagImageSrcStr,
        },
        ...fbCommonMetaTags,
        ...twitterCommonMetaTags,
    ];
}

/**
 * Single post router
 * @param {object} router - router object init from express.Router
 * @returns router middleware
 */
module.exports = (router = new Router()) => {
    router.get('/:topicId', async (req, res) => {
        const topicResponse = await request({
            resource: DISCOURSE_RESOURCE_MAP.TOPIC(req.params.topicId),
        });

        const formattedActiveUsers = activeUsersFormatter(
            topicResponse.data.details.participants
        );

        await addActiveUsersToCache(formattedActiveUsers);

        const formattedSinglePost = await singlePostFormatter(topicResponse.data);
        const metaTags = getMetaTags(req.params.topicId, formattedSinglePost);

        res.render('singlePost', {
            metaTags,
            socialMedias,
            subCategories,
            isSinglePost: true,
            ...formattedSinglePost,
        });
    });

    return router;
};