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gistfile1.txt

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gzipB64ToJson.js

import pako from 'pako'

const gzipB64ToJson = textbuffer => {
  const s1 = new TextDecoder('utf-8').decode(pako.inflate(atob(textbuffer)))
  const start = s1.indexOf('{')
  const end = s1.lastIndexOf('}')
  const s2 = s1.slice(start, end + 1).replace(/[,{](\d+):/g, '"$1":')
  const map = JSON.parse(s2)
  return map
}

export default gzipB64ToJson

readFile.js

const readFile = target => async file => new Promise((resolve) => {
  const reader = new FileReader()
  reader.addEventListener(
    'load',
    ({ target: { result } }) => (
      resolve(result)
    )
  )
  switch (target) {
    case 'readAsDataURL':
    case 'dataURL':
    case 'base64':
      reader.readAsDataURL(file)
      break
    case 'readAsText':
    case 'text':
      reader.readAsText(file)
      break
    case 'buffer':
    case 'arrayBuffer':
    case 'readAsArrayBuffer':
      reader.readAsArrayBuffer(file)
      break
    case 'bs':
    case 'binaryString':
    case 'readAsBinaryString':
      reader.readAsBinaryString(file)
      break
    default:
      throw new Error(`readFile received an unknown option ${target}`)
  }
})

const readFileAsDataURL = readFile('readAsDataURL')
const readFileAsText = readFile('readAsText')
const readFileAsArrayBuffer = readFile('readAsArrayBuffer')
const readFileAsBinaryString = readFile('readAsBinaryString')

export default readFile

export {
  readFileAsDataURL,
  readFileAsText,
  readFileAsArrayBuffer,
  readFileAsBinaryString
}