Demo utility function for directory introspection and data collection

get-meta.js

const fs = require('fs')
const { promisify } = require('util')
const YAML = require('yaml')

async function getMDXInfo(content) {
  try {
    const files = await promisify(fs.readdir)(`./pages/${content}`)
    const mdx = await files.filter(f => f.includes('.mdx'))
    let list = await Promise.all(
      mdx.map(async p => {
        let meta = {}
        let name = p.replace('.mdx', '')
        let { size } = await promisify(fs.stat)(`./pages/${content}/${p}`)
        let page = await promisify(fs.readFile)(`./pages/${content}/${p}`)
        let frontmatter = page.toString().split('---')[1]
        if (frontmatter) {
          meta = YAML.parse(frontmatter)
        }
        return {
          name,
          size,
          ...meta,
        }
      })
    )
    await list.sort((a, b) => new Date(b.createdAt) - new Date(a.createdAt))
    return { list }
  } catch (error) {
    console.log('err in getMDXInfo: ', error)
    throw new Error('Project data unavailable')
  }
}

async function writeMDXInfo(content) {
  try {
    const { list } = await getMDXInfo(content)
    await promisify(fs.writeFile)(
      `./pages/${content}/${content}-list.json`,
      JSON.stringify(list)
    )
  } catch (err) {
    console.log('error in writeMDXInfo: ', err)
  }
}

module.exports = {
  getMDXInfo,
  writeMDXInfo,
}