ElectronicBabylonianLiterature/ebl-frontend

import _ from 'lodash'
import { Manuscript } from 'corpus/domain/manuscript'
import { produce, Draft } from 'immer'

function calculateNextId(manuscripts: Manuscript[]): number {
  const existingIds = manuscripts.map((manuscript) => manuscript.id)
  const maxId: number = _.max(existingIds) || 0
  return maxId + 1
}

export default function populateIds(manuscripts: Manuscript[]): Manuscript[] {
  const firstId = calculateNextId(manuscripts)
  return produce(manuscripts, (draft: Draft<Manuscript>[]) => {
    draft
      .filter((manuscript) => _.isNil(manuscript.id))
      .forEach((manuscript, index) => {
        manuscript.id = firstId + index
      })
  })
}