DEFRA/ivory-front-office

const Joi = require('@hapi/joi')
const chooseAddressHint = 'Choose an address'

class AddressSelectHandlers extends require('defra-hapi-handlers') {
  get schema () {
    return Joi.object({
      address: Joi.string().min(1).required()
    })
  }

  get errorMessages () {
    return {
      address: {
        'any.required': 'Select an address',
        'string.empty': 'Select an address'
      }
    }
  }

  // Overrides parent class handleGet
  async handleGet (request, h, errors) {
    const { Address } = this
    const address = await Address.get(request) || {}
    const { postcodeAddressList = [] } = address

    const manualAddressLink = await this.manualAddressLink()

    // Use the payload in this special case to force the addresses to be displayed even when there is an error
    this.viewData = {
      chooseAddressHint,
      addresses: [{ text: `${postcodeAddressList.length} addresses found` }].concat(
        postcodeAddressList.map(({ addressLine, uprn }) => {
          return {
            value: uprn,
            text: addressLine,
            selected: uprn && uprn === address.uprn
          }
        })),
      manualAddressLink
    }

    return super.handleGet(request, h, errors)
  }

  // Overrides parent class handlePost
  async handlePost (request, h) {
    const { Address } = this
    const address = await Address.get(request) || {}
    const selectedUprn = request.payload.address

    // Retrieve the actual address information from the cached address list
    Object.assign(address, address.postcodeAddressList.find(({ uprn }) => uprn === selectedUprn))

    await Address.set(request, address)

    return super.handlePost(request, h)
  }
}

module.exports = AddressSelectHandlers