main.js

const fs = require("fs")

const ignoreFiles = [
  ".github",
  ".git",
  "Contribution.md",
  "LICENSE",
  "main.js",
  "add-key.js",
  "README.md",
]

function getFiles(dir, files = []) {
  // Get an array of all files and directories in the passed directory using fs.readdirSync
  const fileList = fs.readdirSync(dir)

  const filteredFileList = fileList.filter(file => !ignoreFiles.includes(file))

  for (const file of filteredFileList) {
    const name = `${dir}/${file}`

    if (fs.statSync(name).isDirectory()) {
      getFiles(name, files)
    } else {
      files.push(name)
    }
  }
  return files
}

const main = () => {
  // We already know this
  const enPath = "./en/translation.json"
  const enData = fs.readFileSync(enPath, {
    encoding: "utf-8",
  })
  const targetKeys = Object.keys(JSON.parse(enData))

  const files = getFiles(".")

  files.forEach(file => {
    if (file != enPath) {
      console.info(`Checking locale ${file}`)
      let not_included = []
      try {
        const data = fs.readFileSync(file, {
          encoding: "utf-8",
        })
        const thisLang = JSON.parse(data)
        const thisLangKeys = Object.keys(thisLang)
        not_included = targetKeys.filter(t_key => !thisLangKeys.includes(t_key))
      } catch (e) {
        console.error(`Unexpected Error: ${e}`)
      }
      if (not_included.length > 0) {
        throw new Error(
          `Missing keys for locale ${file}: \n - ${not_included.join(" \n - ")}\n\n`
        )
      }
    }
  })
}

main()