just-paja/improtresk-web

import moment from 'moment-timezone'

import { createSelector } from 'reselect'

import { yearActive } from './yearList'

export const getPriceLevels = createSelector(
  yearActive,
  year => (year && year.priceLevels ? year.priceLevels
    .slice()
    .sort((a, b) => {
      if (a.takesEffectOn > b.takesEffectOn) {
        return -1
      }
      if (a.takesEffectOn < b.takesEffectOn) {
        return 1
      }
      return 0
    })
    .reduce((priceLevels, priceLevel) => [
      ...priceLevels,
      {
        ...priceLevel,
        endsOn: priceLevels[priceLevels.length - 1]
          ? priceLevels[priceLevels.length - 1].takesEffectOn : null
      }
    ], [])
    .reverse() : [])
)

export const getActivePriceLevels = createSelector(
  getPriceLevels,
  (priceLevels) => {
    const now = moment()
    return priceLevels.filter(price =>
      (!price.endsOn || now.isBefore(price.endsOn)) &&
      !now.isBefore(price.takesEffectOn)
    )
  }
)

export const getActivePriceLevel = createSelector(
  getActivePriceLevels,
  priceLevels => priceLevels[0] || null
)