Parse Apples Security Framework Result Codes

parse-apple-security-codes.js

const fetch = require('node-fetch')
const cheerio = require('cheerio')

const baseUri = 'https://developer.apple.com'
const sourceUri = `${baseUri}/documentation/security/1542001-security_framework_result_codes?language=objc`

const printRow = (left, right) => {
  console.info(`| ${left.padEnd(40)} | ${right.padStart(6)} |`)
}

const dumpResult = result => {
  console.info('# Apple Security Framework Result Codes\n')
  console.info(`Source: [${sourceUri}](${sourceUri})\n`)
  Object.keys(result).forEach(section => {
    const errorCodes = result[section]
    // filter empty sections
    if (errorCodes.find(e => e.code == null) != null) {
      return
    }
    console.info(`## ${section}\n`)
    printRow('Constant', 'Code')
    printRow(':---', '---:')
    errorCodes.forEach(errorCode => {
      if (errorCode.code == null) {
        return
      }
      printRow(errorCode.constant, errorCode.code)
    })
    console.info('\n')
  })
}

const fetchSubpage = async (title, path) => {
  try {
    const response = await fetch(`${baseUri}${path}`)
    const data = await response.text()
    const $ = cheerio.load(data)
    const text = $('.declaration pre').text().trim()
    const tokens = text.split(' = ')
    return {
      constant: tokens[0],
      code: tokens[1],
    }
  } catch (err) {
    console.error(err)
  }
}

const fetchErrorCodes = async () => {
  const result = {}
  try {
    const response = await fetch(sourceUri)
    const data = await response.text()
    const $ = cheerio.load(data)
    for (let section of $('#topics section').toArray()) {
      const title = $('h3', section).text()
      const requests = []
      for (let a of $('a', section).toArray()) {
        const path = $(a).attr('href')
        requests.push(fetchSubpage(title, path))
      }
      result[title] = await Promise.all(requests)
    }
    dumpResult(result)
  } catch (err) {
    console.error(err)
  }
}

fetchErrorCodes()