app.ts

import { eachYearOfInterval, getMonth } from 'date-fns'
import currentData from './current.json'
// array
// obj.bio.gender Filter on gender only F
// obj.terms (Array) Filter on type only rep
// get start/end
const app = () => {
  const women = (currentData as Array<unknown>).filter(
    // @ts-ignore
    val => val.bio.gender === 'F'
  )

  // @ts-ignore
  const terms = women
    .map(({ terms }) => terms)
    .flat()
    .filter(term => term.type === 'rep')

  // @ts-ignore
  const arr = terms.map(({ end, start }) => {
    const results = eachYearOfInterval({
      end: new Date(end),
      start: new Date(start),
    })
    if (getMonth(new Date(results[results.length - 1])) === 0) {
      return results
        .slice(0, results.length - 1)
        .map(date => date.getFullYear())
    }
    return results.map(date => date.getFullYear())
  })

  // @ts-ignore
  const final = arr.reduce((acc, val) => {
    // @ts-ignore
    val.forEach(year => {
      // @ts-ignore
      if (acc[year]) {
        // @ts-ignore
        acc[year] = acc[year] + 1
      } else {
        // @ts-ignore
        acc[year] = 1
      }
    })
    return acc
  }, {})

  console.log(final)

  return 0
}

app()