feat: add email domains (#1895)

Implemented Email Domains which allows Platform/Enterprise customers to
send emails to recipients using their custom emails.

packages/trpc/server/enterprise-router/get-subscription.ts

@@ -0,0 +1,40 @@
+import { getInternalClaimPlans } from '@documenso/ee/server-only/stripe/get-internal-claim-plans';
+import { getSubscription } from '@documenso/ee/server-only/stripe/get-subscription';
+import { IS_BILLING_ENABLED } from '@documenso/lib/constants/app';
+import { AppError, AppErrorCode } from '@documenso/lib/errors/app-error';
+
+import { authenticatedProcedure } from '../trpc';
+import { ZGetSubscriptionRequestSchema } from './get-subscription.types';
+
+export const getSubscriptionRoute = authenticatedProcedure
+  .input(ZGetSubscriptionRequestSchema)
+  .query(async ({ ctx, input }) => {
+    const { organisationId } = input;
+
+    ctx.logger.info({
+      input: {
+        organisationId,
+      },
+    });
+
+    const userId = ctx.user.id;
+
+    if (!IS_BILLING_ENABLED()) {
+      throw new AppError(AppErrorCode.INVALID_REQUEST, {
+        message: 'Billing is not enabled',
+      });
+    }
+
+    const [subscription, plans] = await Promise.all([
+      getSubscription({
+        organisationId,
+        userId,
+      }),
+      getInternalClaimPlans(),
+    ]);
+
+    return {
+      subscription,
+      plans,
+    };
+  });