feat: add route for retrieving a single document by id

apps/web/src/pages/api/v1/[...ts-rest].tsx

@@ -1,5 +1,6 @@
 import type { NextApiRequest, NextApiResponse } from 'next';
 
+import { getDocumentById } from '@documenso/lib/server-only/document/get-document-by-id';
 import { getDocuments } from '@documenso/lib/server-only/public-api/get-documents';
 import { contract } from '@documenso/trpc/api-contract/contract';
 import { createNextRoute, createNextRouter } from '@documenso/trpc/server/public-api/ts-rest';
@@ -19,6 +20,14 @@ const router = createNextRoute(contract, {
       },
     };
   },
+  getDocument: async (args) => {
+    const document = await getDocumentById(args.params.id);
+
+    return {
+      status: 200,
+      body: document,
+    };
+  },
 });
 
 const nextRouter = createNextRouter(contract, router);

packages/trpc/api-contract/contract.ts

@@ -24,14 +24,29 @@ const SuccessfulResponse = z.object({
   totalPages: z.number(),
 });
 
-export const contract = c.router({
-  getDocuments: {
-    method: 'GET',
-    path: '/documents',
-    query: GetDocumentsQuery,
-    responses: {
-      200: SuccessfulResponse,
+export const contract = c.router(
+  {
+    getDocuments: {
+      method: 'GET',
+      path: '/documents',
+      query: GetDocumentsQuery,
+      responses: {
+        200: SuccessfulResponse,
+      },
+      summary: 'Get all documents',
+    },
+    getDocument: {
+      method: 'GET',
+      path: `/documents/:id`,
+      responses: {
+        200: DocumentSchema,
+      },
+      summary: 'Get a single document',
     },
-    summary: 'Get all documents for a user',
   },
-});
+  {
+    baseHeaders: z.object({
+      authorization: z.string(),
+    }),
+  },
+);