Switch to API route for newsletter form submission 🫠

not using the latest SvelteKit use:enhance thingy but… hey!

src/routes/api/newsletter/+server.ts

@@ -0,0 +1,37 @@
+import { NEWSLETTER_API_TOKEN, NEWSLETTER_LIST_ID } from '$env/static/private'
+import type { RequestHandler } from './$types'
+import { error } from '@sveltejs/kit'
+
+export const POST = (async ({ request }) => {
+    const { email } = await request.json()
+
+    // No email
+    if (!email) {
+        throw error(400, { message: 'NO_EMAIL' })
+    }
+    // Invalid email
+    else if (!email || !email.match(/^[a-zA-Z0-9.!#$%&’*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$/)) {
+        throw error(400, { message: 'INVALID_EMAIL' })
+    }
+
+    // Newsletter API request
+    const req = await fetch(`https://emailoctopus.com/api/1.6/lists/${NEWSLETTER_LIST_ID}/contacts`, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+            api_key: NEWSLETTER_API_TOKEN,
+            email_address: email,
+        })
+    })
+    const res = await req.json()
+
+    // Other error
+    if (res && res.status !== 'PENDING') {
+        throw error(400, { message: res.error.code })
+    }
+
+    return new Response(JSON.stringify({
+        success: true,
+        message: res.status,
+    }))
+}) satisfies RequestHandler