import { compress, decompress } from 'compress-json'

let data = { 
  user: 'Alice',
  // more fields of any json values (string, number, array, object, e.t.c.)
}

let compressed = compress(data) // the result is an array
fetch('/submit', {
  method: 'post',
  body: JSON.stringify(compressed) // convert into string if needed
})

let reversed = decompress(compressed)
data === reversed // will be false
JSON.stringify(data) === JSON.stringify(reversed) // will be true

let longStr = 'A very very long string, that is repeated'
let data = {
  int: 42,
  float: 12.34,
  str: 'Alice',
  longStr,
  longNum: 9876543210.123455,
  bool: true,
  bool2: false,
  arr: [42, longStr],
  arr2: [42, longStr], // identical values will be deduplidated, including array and object
  obj: { // nested values are supported
    id: 123,
    name: 'Alice',
    role: [ 'Admin', 'User', 'Guest' ],
    longStr: 'A very very long string, that is repeated',
    longNum: 9876543210.123455
  },
  escape: [ 's|str', 'n|123', 'o|1', 'a|1', 'b|T', 'b|F' ]
}

// [ encoded value array, root value index ]
let compressed = [
  [  // encoded value array
    'int', // string
    'float',
    'str',
    'longStr',
    'longNum',
    'bool',
    'bool2',
    'arr',
    'arr2',
    'obj',
    'escape',
    'a|0|1|2|3|4|5|6|7|8|9|A',
    'n|g', // number (integer) (base62-encoded)
    'n|C.h', // number (float) (integer part and decimals are base62-encoded separately)
    'Alice',
    'A very very long string, that is repeated',
    'n|AmOy42.2KCf',
    'b|T', // boolean (true)
    'b|F', // boolean (false)
    'a|C|F', // array
    'id',
    'name',
    'role',
    'a|K|L|M|3|4',
    'n|1z',
    'Admin',
    'User',
    'Guest',
    'a|P|Q|R',
    'o|N|O|E|S|F|G', // object
    's|s|str', // escaped string
    's|n|123', // escaped number
    's|o|1',
    's|a|1',
    's|b|T', // escaped boolean
    's|b|F',
    'a|U|V|W|X|Y|Z',
    'o|B|C|D|E|F|G|H|I|J|J|T|a'
  ],
  'b' // root value index
]

import { compress } from 'compress-json'
import { trimUndefined, trimUndefinedRecursively } from 'compress-json'

let user = { name: 'Alice', role: undefined }

compress(user) // will throw an error since undefined field is not supported

trimUndefined(user) // explicitly remove undefined fields

compress(user) // now it will not throw error since user.role is deleted

let a = { name: 'a', extra: undefined }
let b = { name: 'b', a }
trimUndefinedRecursively(b)
compress(b) // now it will not throw error since b.a.extra is deleted