Recursively update all timestamps in a document to current timestamps based on when the document/fixture was created (Moment.js, Node.js)

timestampUpdate.js

// great for fixtures used in tests that need to stay up to date 

// needs moment.js
const moment = require('moment')

const updateTimestamps = (entity, baseTimestamp, path = '', tsFields) => {
  // usage: recusrively updates all Timestamps in a json fixture for tests
  const nowTs = moment().clone().startOf('hour')
  const diff = Math.abs(nowTs.diff(baseTimestamp, 'hours'))

  if (entity && entity.constructor === Array)
    entity = entity.map((item, idx) =>
      updateTimestamps(item, baseTimestamp, `${path}[${idx}]`)
    )
  if (entity && entity.constructor === Object) {
    const keys = Object.keys(entity)

    for (const key of keys)
      if (tsFields.includes(key)) {
        entity[key] = moment(entity[key]).clone().add(
          diff,
          'hours'
        ).toDate()
        // console.log(`${path}${ path ? '.' : '' }${key}`, entity[key])
      } else if (entity[key] && entity[key].constructor === Object)
        entity[key] = updateTimestamps(
          entity[key],
          baseTimestamp,
          `${path}${key}`
        )
      else if (entity[key] && entity[key].constructor === Array)
        entity[key] = entity[key].map((item, idx) =>
          updateTimestamps(item, baseTimestamp, `${path}${key}[${idx}]`)
        )
  }
  return entity
}

// results should be a json object or array for which every timestamp defined in ts fields will be updated recursively
let results = []

// usage: recusrively updates all Timestamps in a json fixture for tests
const updatedEntity = updateTimestamps(results, moment().startOf('hour').toISOString(),'',[
  'ts',
  'updatedAt',
  'createdAt'
])