shellphone.app/app/onboarding/pages/welcome/step-three.tsx

import type { BlitzPage, GetServerSideProps } from "blitz"
import { Routes, getSession, useRouter, useMutation } from "blitz"
import { useEffect } from "react"
import twilio from "twilio"
import { useForm } from "react-hook-form"
import clsx from "clsx"

import db from "../../../../db"
import OnboardingLayout from "../../components/onboarding-layout"
import setPhoneNumber from "../../mutations/set-phone-number"

type PhoneNumber = {
	phoneNumber: string
	sid: string
}

type Props = {
	availablePhoneNumbers: PhoneNumber[]
}

type Form = {
	phoneNumberSid: string
}

const StepThree: BlitzPage<Props> = ({ availablePhoneNumbers }) => {
	const {
		register,
		handleSubmit,
		setValue,
		formState: { isSubmitting },
	} = useForm<Form>()
	const router = useRouter()
	const [setPhoneNumberMutation] = useMutation(setPhoneNumber)

	useEffect(() => {
		if (availablePhoneNumbers[0]) {
			setValue("phoneNumberSid", availablePhoneNumbers[0].sid)
		}
	})

	const onSubmit = handleSubmit(async ({ phoneNumberSid }) => {
		if (isSubmitting) {
			return
		}

		await setPhoneNumberMutation({ phoneNumberSid })
		await router.push(Routes.Messages())
	})

	return (
		<OnboardingLayout currentStep={3} previous={{ href: "/welcome/step-two", label: "Back" }}>
			<div className="flex flex-col space-y-4 items-center">
				<form onSubmit={onSubmit}>
					<label
						htmlFor="phoneNumberSid"
						className="block text-sm font-medium text-gray-700"
					>
						Phone number
					</label>
					<select
						id="phoneNumberSid"
						className="mt-1 block w-full pl-3 pr-10 py-2 text-base border-gray-300 focus:outline-none focus:ring-primary-500 focus:border-primary-500 sm:text-sm rounded-md"
						{...register("phoneNumberSid")}
					>
						{availablePhoneNumbers.map(({ sid, phoneNumber }) => (
							<option value={sid} key={sid}>
								{phoneNumber}
							</option>
						))}
					</select>

					<button
						type="submit"
						className={clsx(
							"max-w-[240px] mt-6 mx-auto w-full inline-flex justify-center rounded-md border border-transparent shadow-sm px-4 py-2 text-base font-medium text-white focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-primary-500 sm:text-sm",
							!isSubmitting && "bg-primary-600 hover:bg-primary-700",
							isSubmitting && "bg-primary-400 cursor-not-allowed"
						)}
					>
						Save
					</button>
				</form>
			</div>
		</OnboardingLayout>
	)
}

StepThree.authenticate = true

export const getServerSideProps: GetServerSideProps<Props> = async ({ req, res }) => {
	const session = await getSession(req, res)
	const customer = await db.customer.findFirst({ where: { id: session.userId! } })
	if (!customer) {
		return {
			redirect: {
				destination: Routes.StepOne().pathname,
				permanent: false,
			},
		}
	}

	if (!customer.accountSid || !customer.authToken) {
		return {
			redirect: {
				destination: Routes.StepTwo().pathname,
				permanent: false,
			},
		}
	}

	const incomingPhoneNumbers = await twilio(
		customer.accountSid,
		customer.authToken
	).incomingPhoneNumbers.list()
	const phoneNumbers = incomingPhoneNumbers.map(({ phoneNumber, sid }) => ({ phoneNumber, sid }))

	return {
		props: {
			availablePhoneNumbers: phoneNumbers,
		},
	}
}

export default StepThree