Nuxt でウェイトリストを作る

app/
  pages/index.vue
  pages/thanks.vue
  components/WaitlistForm.vue
server/
  api/waitlist.post.ts
nuxt.config.ts
.env

export default defineNuxtConfig({
  runtimeConfig: {
    ikiformSecretKey: "",
  },
  routeRules: {
    "/": { prerender: true },
    "/thanks": { prerender: true },
  },
});

NUXT_IKIFORM_SECRET_KEY=ik_sk_your_secret_key

{
  "version": 1,
  "title": "Waitlist",
  "fields": [
    { "id": "email", "type": "email", "label": "Email", "required": true, "placeholder": "you@company.com" },
    { "id": "role", "type": "select", "label": "What do you do?", "options": [{ "value": "founder", "label": "Founder" }, { "value": "engineer", "label": "Engineer" }, { "value": "designer", "label": "Designer" }, { "value": "other", "label": "Something else" }] },
    { "id": "ref", "type": "text", "label": "Source", "validation": { "max_length": 40 } }
  ]
}

import { z } from "zod";

const Signup = z.object({
  email: z.email(),
  role: z.enum(["founder", "engineer", "designer", "other"]).optional().catch(undefined),
  ref: z.string().regex(/^[a-z0-9_-]{1,40}$/).catch("direct"),
  _gotcha: z.string().catch(""),
});

const MESSAGES = {
  email: "Enter the email we should send your invite to.",
  busy: "Lots of people are joining. Try again in a minute.",
  failed: "Couldn't join the list. Try again.",
};

type Problem = keyof typeof MESSAGES;

export default defineEventHandler(async (event) => {
  if (getRequestHeader(event, "sec-fetch-site") === "cross-site") {
    throw createError({ status: 403, message: "Posts from other sites aren't accepted." });
  }
  const plain = !getRequestHeader(event, "content-type")?.includes("application/json");

  const answer = (problem: Problem | null) => {
    if (plain) return sendRedirect(event, problem ? `/?problem=${problem}` : "/thanks", 303);
    if (problem) throw createError({ status: problem === "busy" ? 429 : 400, message: MESSAGES[problem] });
    return { joined: true };
  };

  const parsed = Signup.safeParse(await readBody(event));
  if (!parsed.success) return answer("email");

  const config = useRuntimeConfig(event);
  const origin = getRequestHeader(event, "origin");
  const response = await fetch("https://ikiform.com/f/frm_xxxxxxxxxxxxxxxx", {
    method: "POST",
    headers: {
      Accept: "application/json",
      "Content-Type": "application/json",
      Authorization: `Bearer ${config.ikiformSecretKey}`,
      ...(origin ? { Origin: origin } : {}),
    },
    body: JSON.stringify(parsed.data),
    signal: AbortSignal.timeout(8000),
  }).catch(() => null);

  if (!response) return answer("failed");
  if (response.status === 429) return answer("busy");
  const result = await response.json().catch(() => null);
  if (result?.ok) return answer(null);
  return answer(result?.error?.fields?.email ? "email" : "failed");
});

<script setup lang="ts">
const MESSAGES: Record<string, string> = {
  email: "Enter the email we should send your invite to.",
  busy: "Lots of people are joining. Try again in a minute.",
  failed: "Couldn't join the list. Try again.",
};

const route = useRoute();
const email = ref("");
const role = ref("");
const source = ref("direct");
const trap = ref("");
const status = ref<"idle" | "sending" | "joined">("idle");
const error = ref("");

onMounted(() => {
  const tag = String(route.query.ref ?? route.query.utm_source ?? "").toLowerCase().slice(0, 40);
  if (tag) source.value = tag;
  const problem = String(route.query.problem ?? "");
  if (MESSAGES[problem]) error.value = MESSAGES[problem];
});

async function join() {
  status.value = "sending";
  error.value = "";
  try {
    await $fetch("/api/waitlist", {
      method: "POST",
      body: { email: email.value, role: role.value || undefined, ref: source.value, _gotcha: trap.value },
    });
    status.value = "joined";
  } catch (failure) {
    error.value = (failure as { data?: { message?: string } }).data?.message ?? "Couldn't join the list. Try again.";
    status.value = "idle";
  }
}
</script>

<template>
  <p v-if="status === 'joined'" role="status">You're on the list. We'll email you on launch day.</p>
  <form v-else method="post" action="/api/waitlist" @submit.prevent="join">
    <label for="email">Email</label>
    <input id="email" v-model="email" name="email" type="email" autocomplete="email" required />
    <label for="role">What do you do?</label>
    <select id="role" v-model="role" name="role">
      <option value="">Choose one</option>
      <option value="founder">Founder</option>
      <option value="engineer">Engineer</option>
      <option value="designer">Designer</option>
      <option value="other">Something else</option>
    </select>
    <input type="hidden" name="ref" :value="source" />
    <input v-model="trap" name="_gotcha" type="text" tabindex="-1" autocomplete="off" hidden />
    <p role="alert">{{ error }}</p>
    <button :disabled="status === 'sending'">{{ status === "sending" ? "Joining" : "Join the waitlist" }}</button>
  </form>
</template>