json-compactor.ts

json-compactor.ts

import * as fs from 'fs'

function isPrimitive (v: any) {
  const tOfV = typeof v
  if (tOfV === 'object') return false
  if (v === null || tOfV === 'boolean' || tOfV === 'bigint' || tOfV === 'number' || tOfV === 'string' || tOfV === 'undefined') {
    return true
  }
  return false
}
function walk (obj: any, acc: string[] = [], fields: string[] = []) {
  for (const k in obj) {
    const nextFields = [...fields, k]
    const v = obj[k]
    if (isPrimitive(v)) {
      acc.push(`${nextFields.join('.')}: ${typeof v}`)
    } else {
      if (Array.isArray(v) && v.length > 0) {
        walk(v[0], acc, nextFields)
      } else {
        walk(v, acc, nextFields)
      }
    }
  }
}

const json = JSON.parse(fs.readFileSync('./best.file.json').toString())

const acc: string[] = []
const fields: string[] = []
walk(json, acc, fields)
console.log(acc.join('\n'))