import truncateJson from 'truncate-json'

// Object properties and array items beyond `maxSize` are omitted.
const maxSize = 15
const jsonString = JSON.stringify({ a: 'one', b: 'two' })
console.log(jsonString)
// '{"a":"one","b":"two"}' (21 bytes)
console.log(truncateJson(jsonString, maxSize).jsonString)
// '{"a":"one"}' (11 bytes)

// Works deeply inside objects and arrays
const jsonString = JSON.stringify([
  'one',
  { a: 'two', b: { c: 'three', d: 'four' } },
  'five',
])
console.log(jsonString)
// '["one",{"a":"two","b":{"c":"three","d":"four"}},"five"]' (55 bytes)
const returnValue = truncateJson(jsonString, 40)
console.log(returnValue.jsonString)
// '["one",{"a":"two","b":{"c":"three"}}]' (37 bytes)

// Omitted/truncated properties are returned
console.log(returnValue.truncatedProps)
// [
//   { path: [ 1, 'b', 'd' ], value: 'four' },
//   { path: [ 2 ], value: 'five' }
// ]
const isTruncated = returnValue.truncatedProps.length !== 0
console.log(isTruncated) // true

// Indentation is automatically detected and preserved
const jsonString = JSON.stringify({ a: 'one', b: 'two' }, undefined, 2)
console.log(jsonString)
// '{
//   "a": "one",
//   "b": "two"
// }' (30 bytes)
console.log(truncateJson(jsonString, 25).jsonString)
// '{
//   "a": "one"
// }' (16 bytes)

// The top-level value can be any JSON type, not only objects or arrays
const jsonString = JSON.stringify('This is an example top-level string')
console.log(truncateJson(jsonString, 25).jsonString)
// '"This is an example t..."' (25 bytes)