topics-upcase.js

#!/usr/bin/env node
import fs from 'fs'
import path from 'path'
import walk from 'walk-sync'
import readFrontmatter from '../../lib/read-frontmatter.js'
import allowTopics from '../../data/allowed-topics.js'

// key is the downcased valued for comparison
// value is the display value with correct casing
const topicLookupObject = {}

allowTopics.forEach((topic) => {
  const lowerCaseTopic = topic.toLowerCase()
  topicLookupObject[lowerCaseTopic] = topic
})

const files = walk(path.join(process.cwd(), 'content'), {
  includeBasePath: true,
  directories: false,
})
files.forEach((file) => {
  const fileContent = fs.readFileSync(file, 'utf8')
  const { content, data } = readFrontmatter(fileContent)
  if (data.topics === undefined) return

  const topics = data.topics.map((elem) => elem.toLowerCase())
  const newTopics = []
  topics.forEach((topic) => {
    // for each topic in the markdown file, lookup the display value
    // and add it to a new array
    newTopics.push(topicLookupObject[topic])
  })
  data.topics = newTopics
  const newContents = readFrontmatter.stringify(content, data, { lineWidth: 10000 })
  fs.writeFileSync(file, newContents)
})