@defra-fish/gafl-webapp-service/src/services/address-lookup/address-lookup-service.js

The websales frontend for the GAFL service

import fetch from 'node-fetch'
import { ADDRESS_LOOKUP_SERVICE, ADDRESS_LOOKUP_TIMEOUT_MS_DEFAULT } from '../../constants.js'
import db from 'debug'
const debug = db('webapp:address-lookup-service')

export default async (premises, postcode) => {
  const url = new URL(process.env.ADDRESS_LOOKUP_URL)

  const params = new URLSearchParams({
    postcode: postcode,
    premises: premises,
    key: process.env.ADDRESS_LOOKUP_KEY,
    lang: ADDRESS_LOOKUP_SERVICE.lang,
    dataset: ADDRESS_LOOKUP_SERVICE.dataset
  })

  url.search = params.toString()

  debug({ url })

  const { results } = await (async () => {
    try {
      const response = await fetch(url.href, {
        headers: { 'Content-Type': 'application/json' },
        timeout: process.env.ADDRESS_LOOKUP_MS || ADDRESS_LOOKUP_TIMEOUT_MS_DEFAULT
      })
      return response.json()
    } catch (err) {
      // On a failure to connect do not stop the user journey
      console.error('Unable to connect to address lookup service', err)
      return { results: [] }
    }
  })()

  debug({ results })

  // Map and enumerate the results
  return results
    ? results.map((r, idx) => ({
      id: idx,
      address: `${r.address.replace(r.postcode, '').toLowerCase()}${r.postcode}`,
      premises: r.premises,
      street: r.street_address,
      locality: r.locality,
      town: r.city,
      postcode: r.postcode,
      country: r.country
    }))
    : []
}