hanzo.ai/hooks/useQuote.ts

'use client'

import { useEffect, useState } from 'react'
import { api } from '@hanzo/app/lib/api'
import { drop, kept, read, type Quote } from '@/lib/coupon'

/**
 * Commerce's quote for a coupon code (lib/coupon): `undefined` while it is
 * asked, `null` with no code. A code commerce refuses is dropped from this tab
 * when it is the code the tab keeps; one it could not be asked about is said as
 * such and kept. The answer is held
 * with the code it was asked for, so a new code reads as asked until its own
 * answer arrives.
 */
export function useQuote(code: string | null): Quote | null | undefined {
  const [got, setGot] = useState<{ code: string; quote: Quote } | null>(null)
  useEffect(() => {
    if (!code) return
    let live = true
    const answer = (quote: Quote) => live && setGot({ code, quote })

    fetch(`${api()}/v1/billing/plans?${new URLSearchParams({ coupon: code })}`, { cache: 'no-store' })
      .then((res) => (res.ok ? res.json() : null))
      .then((body: unknown) => {
        const quote = read(body) ?? { refused: '' }
        if ('refused' in quote && quote.refused && kept() === code) drop()
        answer(quote)
      })
      .catch(() => answer({ refused: '' }))
    return () => {
      live = false
    }
  }, [code])
  if (!code) return null
  return got?.code === code ? got.quote : undefined
}