feat: email verification for registration (#599)

packages/lib/server-only/auth/send-confirmation-email.ts

@@ -0,0 +1,56 @@
+import { createElement } from 'react';
+
+import { mailer } from '@documenso/email/mailer';
+import { render } from '@documenso/email/render';
+import { ConfirmEmailTemplate } from '@documenso/email/templates/confirm-email';
+import { prisma } from '@documenso/prisma';
+
+export interface SendConfirmationEmailProps {
+  userId: number;
+}
+
+export const sendConfirmationEmail = async ({ userId }: SendConfirmationEmailProps) => {
+  const user = await prisma.user.findFirstOrThrow({
+    where: {
+      id: userId,
+    },
+    include: {
+      VerificationToken: {
+        orderBy: {
+          createdAt: 'desc',
+        },
+        take: 1,
+      },
+    },
+  });
+
+  const [verificationToken] = user.VerificationToken;
+
+  if (!verificationToken?.token) {
+    throw new Error('Verification token not found for the user');
+  }
+
+  const assetBaseUrl = process.env.NEXT_PUBLIC_WEBAPP_URL || 'http://localhost:3000';
+  const confirmationLink = `${assetBaseUrl}/verify-email/${verificationToken.token}`;
+  const senderName = process.env.NEXT_PRIVATE_SMTP_FROM_NAME || 'Documenso';
+  const senderAdress = process.env.NEXT_PRIVATE_SMTP_FROM_ADDRESS || 'noreply@documenso.com';
+
+  const confirmationTemplate = createElement(ConfirmEmailTemplate, {
+    assetBaseUrl,
+    confirmationLink,
+  });
+
+  return mailer.sendMail({
+    to: {
+      address: user.email,
+      name: user.name || '',
+    },
+    from: {
+      name: senderName,
+      address: senderAdress,
+    },
+    subject: 'Please confirm your email',
+    html: render(confirmationTemplate),
+    text: render(confirmationTemplate, { plainText: true }),
+  });
+};