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80 lines
2.2 KiB
80 lines
2.2 KiB
const fs = require('fs')
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const posts_dir = 'posts/'
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const routes = new Map();
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if (!fs.existsSync(posts_dir)) throw Error(`Missing ${posts_dir}`)
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let posts = readPosts();
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setInterval(() => posts = readPosts(), 1000 * 60 * 60)
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function readPosts() {
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console.warn("reading all posts")
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const files = fs.readdirSync(posts_dir)
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if (files.length === 0) throw Error(`Could not find posts in ${posts_dir}`)
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return files.filter(file_name => file_name.endsWith('.json'))
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.map(file_name => `${posts_dir}${file_name}`)
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.map(readJSONAsObject)
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}
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function readJSONAsObject(filename) {
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return JSON.parse(fs.readFileSync(filename, 'utf8'))
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}
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function notFoundResponse(res) {
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res.status(404).send('Sorry, can not find that')
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}
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routes.set('', async (req, res) => {
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if (req.query.sort === '-1' || req.query.sort === '1') {
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const posts_sorted = posts.sort((a, b) => {
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return new Date(a.date).getTime() - new Date(b.date).getTime()
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})
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if (req.query.sort === '1') res.send(posts_sorted)
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else res.send(posts_sorted.reverse())
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return
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}
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// Default response when there are no interesting queries
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res.send(posts)
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})
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routes.set('/:id', async (req, res) => {
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const re = /[0-9A-Fa-f]{24}/g
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if (!re.test(req.params.id)) {
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notFoundResponse(res)
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return
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}
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const results = posts.filter(post => post._id === req.params.id)
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if (!results.length) notFoundResponse(res)
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else res.send(results[0])
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})
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// For the sitemap.xml, will be listed in the XML Sitemap Index
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routes.set('/urls', async (req, res) => {
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const re = /(\/api\/)?(.*)\/urls/g
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const result = [...req.raw.originalUrl.matchAll(re)]
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if (!result) notFoundResponse(res)
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const endpoint = result [1] ? result[1][2] : result[0][2]
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// Assumes https
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const BASE_URL = 'https://' + req.raw.hostname + endpoint
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const urls = posts.map(post =>
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`\n <url>
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<loc>${BASE_URL}/${post._id}</loc>
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<lastmod>${post.date}</lastmod>
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<changefreq>never</changefreq>
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<priority>0.9</priority>
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</url>`
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).join("\n")
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const xml = `<?xml version="1.0" encoding="UTF-8"?>\r<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
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${urls}\n\r</urlset>`
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res.send(xml)
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})
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module.exports = routes
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