feat: create a banner with custom text by admin

packages/lib/server-only/admin/update-user.ts

@@ -1,5 +1,5 @@
 import { prisma } from '@documenso/prisma';
-import { Role } from '@documenso/prisma/client';
+import type { Role } from '@documenso/prisma/client';
 
 export type UpdateUserOptions = {
   id: number;

packages/lib/server-only/banner/get-banner.ts

@@ -0,0 +1,11 @@
+'use server';
+
+import { prisma } from '@documenso/prisma';
+
+export const getBanner = async () => {
+  return await prisma.banner.findUnique({
+    where: {
+      id: 1,
+    },
+  });
+};

packages/lib/server-only/banner/upsert-banner.ts

@@ -0,0 +1,28 @@
+'use server';
+
+import { prisma } from '@documenso/prisma';
+import { Role } from '@documenso/prisma/client';
+
+export type UpdateUserOptions = {
+  userId: number;
+  show?: boolean;
+  text?: string | undefined;
+};
+
+export const upsertBanner = async ({ userId, show, text }: UpdateUserOptions) => {
+  const user = await prisma.user.findUnique({
+    where: {
+      id: userId,
+    },
+  });
+
+  if (!user?.roles.includes(Role.ADMIN)) {
+    throw Error('You are unauthorised to perform this action');
+  }
+
+  return await prisma.banner.upsert({
+    where: { id: 1, user: {} },
+    update: { show, text },
+    create: { show, text: text ?? '' },
+  });
+};