feat: Add Saleor webhook handler with Resend email integration

- Add Resend SDK for transactional emails
- Create React Email templates for order events:
  - OrderConfirmation
  - OrderShipped
  - OrderCancelled
  - OrderPaid
- Multi-language support (SR, EN, DE, FR)
- Customer emails in their language
- Admin emails in English to me@hytham.me and tamara@hytham.me
- Webhook handler at /api/webhooks/saleor
- Supports: ORDER_CONFIRMED, ORDER_FULLY_PAID, ORDER_CANCELLED, ORDER_FULFILLED
- Add GraphQL mutation to create webhooks in Saleor
- Add Resend API key to .env.local

src/lib/resend.ts

@@ -0,0 +1,100 @@
+import { Resend } from "resend";
+
+let resendClient: Resend | null = null;
+
+function getResendClient(): Resend {
+  if (!resendClient) {
+    if (!process.env.RESEND_API_KEY) {
+      throw new Error("RESEND_API_KEY environment variable is not set");
+    }
+    resendClient = new Resend(process.env.RESEND_API_KEY);
+  }
+  return resendClient;
+}
+
+export const ADMIN_EMAILS = ["me@hytham.me", "tamara@hytham.me"];
+
+export async function sendEmail({
+  to,
+  subject,
+  react,
+  text,
+  tags,
+  idempotencyKey,
+}: {
+  to: string | string[];
+  subject: string;
+  react: React.ReactNode;
+  text?: string;
+  tags?: { name: string; value: string }[];
+  idempotencyKey?: string;
+}) {
+  const resend = getResendClient();
+  const { data, error } = await resend.emails.send(
+    {
+      from: "ManoonOils <support@manoonoils.com>",
+      to: Array.isArray(to) ? to : [to],
+      subject,
+      react,
+      text,
+      tags,
+      ...(idempotencyKey && { idempotencyKey }),
+    }
+  );
+
+  if (error) {
+    console.error("Failed to send email:", error);
+    throw error;
+  }
+
+  return data;
+}
+
+export async function sendEmailToCustomer({
+  to,
+  subject,
+  react,
+  text,
+  language,
+  idempotencyKey,
+}: {
+  to: string;
+  subject: string;
+  react: React.ReactNode;
+  text?: string;
+  language: string;
+  idempotencyKey?: string;
+}) {
+  const tag = `customer-${language}`;
+  return sendEmail({
+    to,
+    subject,
+    react,
+    text,
+    tags: [{ name: "type", value: tag }],
+    idempotencyKey,
+  });
+}
+
+export async function sendEmailToAdmin({
+  subject,
+  react,
+  text,
+  eventType,
+  orderId,
+}: {
+  subject: string;
+  react: React.ReactNode;
+  text?: string;
+  eventType: string;
+  orderId: string;
+}) {
+  return sendEmail({
+    to: ADMIN_EMAILS,
+    subject: `[Admin] ${subject}`,
+    react,
+    text,
+    tags: [{ name: "type", value: "admin-notification" }],
+    idempotencyKey: `admin-${eventType}/${orderId}`,
+  });
+}

src/lib/saleor/create-webhooks.graphql

@@ -0,0 +1,77 @@
+mutation CreateSaleorWebhooks {
+  orderConfirmedWebhook: webhookCreate(input: {
+    name: "Resend - Order Confirmed"
+    targetUrl: "https://manoonoils.com/api/webhooks/saleor"
+    events: [ORDER_CONFIRMED]
+    isActive: true
+  }) {
+    webhook {
+      id
+      name
+      targetUrl
+      isActive
+    }
+    errors {
+      field
+      message
+      code
+    }
+  }
+
+  orderPaidWebhook: webhookCreate(input: {
+    name: "Resend - Order Paid"
+    targetUrl: "https://manoonoils.com/api/webhooks/saleor"
+    events: [ORDER_FULLY_PAID]
+    isActive: true
+  }) {
+    webhook {
+      id
+      name
+      targetUrl
+      isActive
+    }
+    errors {
+      field
+      message
+      code
+    }
+  }
+
+  orderCancelledWebhook: webhookCreate(input: {
+    name: "Resend - Order Cancelled"
+    targetUrl: "https://manoonoils.com/api/webhooks/saleor"
+    events: [ORDER_CANCELLED]
+    isActive: true
+  }) {
+    webhook {
+      id
+      name
+      targetUrl
+      isActive
+    }
+    errors {
+      field
+      message
+      code
+    }
+  }
+
+  orderFulfilledWebhook: webhookCreate(input: {
+    name: "Resend - Order Fulfilled"
+    targetUrl: "https://manoonoils.com/api/webhooks/saleor"
+    events: [ORDER_FULFILLED]
+    isActive: true
+  }) {
+    webhook {
+      id
+      name
+      targetUrl
+      isActive
+    }
+    errors {
+      field
+      message
+      code
+    }
+  }
+}