SaaS の解約フローに解約アンケートを追加する

"use server";

import { headers } from "next/headers";
import { redirect } from "next/navigation";
import { after } from "next/server";
import Stripe from "stripe";
import { requireSession } from "@/lib/session";
import { readReason } from "./reasons";

const stripe = new Stripe(process.env.STRIPE_SECRET_KEY!);

export async function cancelPlan(formData: FormData) {
  const session = await requireSession();
  const skipped = formData.get("intent") === "skip";
  const reason = skipped ? null : readReason(formData.get("reason"));
  const details = skipped ? "" : String(formData.get("details") ?? "").slice(0, 2000);

  await stripe.subscriptions.update(session.subscriptionId, {
    cancel_at_period_end: true,
    ...(reason ? { cancellation_details: { feedback: reason, comment: details || undefined } } : {}),
  });

  if (reason) {
    const origin = (await headers()).get("origin");
    after(async () => {
      await fetch("https://ikiform.com/f/frm_xxxxxxxxxxxxxxxx", {
        method: "POST",
        headers: {
          Accept: "application/json",
          "Content-Type": "application/json",
          Authorization: `Bearer ${process.env.IKIFORM_SECRET_KEY}`,
          ...(origin ? { Origin: origin } : {}),
        },
        body: JSON.stringify({
          reason,
          details,
          switched_to: reason === "switched_service" ? String(formData.get("switched_to") ?? "") : "",
          account_id: session.accountId,
          plan: session.plan,
          months_subscribed: Math.floor((Date.now() - session.subscribedAt.getTime()) / 2_629_800_000),
        }),
      }).catch(() => undefined);
    });
  }

  redirect("/billing/cancelled");
}

import { cancelPlan } from "./actions";
import { REASONS } from "./reasons";

export default function CancelPage() {
  return (
    <form action={cancelPlan}>
      <h1>Cancel your plan</h1>
      <p>Your plan stays active until the end of the billing period. One question first, if you have a moment.</p>
      <fieldset>
        <legend>What's the main reason you're cancelling?</legend>
        {REASONS.map(([value, label]) => (
          <label key={value}>
            <input type="radio" name="reason" value={value} required /> {label}
          </label>
        ))}
      </fieldset>
      <label htmlFor="switched_to">If you're moving to another tool, which one?</label>
      <input id="switched_to" name="switched_to" maxLength={120} />
      <label htmlFor="details">Anything you'd like us to know?</label>
      <textarea id="details" name="details" rows={4} maxLength={2000} />
      <button name="intent" value="submit">Cancel my plan</button>
      <button name="intent" value="skip" formNoValidate>Skip and cancel</button>
    </form>
  );
}

import { redirect } from "@sveltejs/kit";
import { IKIFORM_SECRET_KEY, STRIPE_SECRET_KEY } from "$app/env/private";
import Stripe from "stripe";
import { readReason } from "#lib/reasons.js";
import type { Actions } from "./$types";

const stripe = new Stripe(STRIPE_SECRET_KEY);

export const actions = {
  default: async ({ request, locals, fetch, url }) => {
    const session = locals.session;
    if (!session) redirect(303, "/sign-in");
    const form = await request.formData();
    const reason = form.get("intent") === "skip" ? null : readReason(form.get("reason"));
    const details = reason ? String(form.get("details") ?? "").slice(0, 2000) : "";

    await stripe.subscriptions.update(session.subscriptionId, {
      cancel_at_period_end: true,
      ...(reason ? { cancellation_details: { feedback: reason, comment: details || undefined } } : {}),
    });

    if (reason) {
      await fetch("https://ikiform.com/f/frm_xxxxxxxxxxxxxxxx", {
        method: "POST",
        signal: AbortSignal.timeout(3000),
        headers: {
          Accept: "application/json",
          "Content-Type": "application/json",
          Authorization: `Bearer ${IKIFORM_SECRET_KEY}`,
          Origin: request.headers.get("origin") ?? url.origin,
        },
        body: JSON.stringify({
          reason,
          details,
          switched_to: reason === "switched_service" ? String(form.get("switched_to") ?? "") : "",
          account_id: session.accountId,
          plan: session.plan,
          months_subscribed: session.monthsSubscribed,
        }),
      }).catch(() => undefined);
    }

    redirect(303, "/billing/cancelled");
  },
} satisfies Actions;