Add Zod schema for stats

Author: MattIPv4

src/routes/stats.schema.ts

@@ -0,0 +1,7 @@
+import * as z from 'zod';
+
+export const statsResponseSchema = z.object({
+    libraries: z.number(),
+}).partial();
+
+export type StatsResponse = z.infer<typeof statsResponseSchema>;

src/routes/stats.spec.ts

@@ -1,5 +1,6 @@
 import { describe, it, expect } from 'vitest';
 
+import type { StatsResponse } from './stats.schema.ts';
 import testCors from '../utils/spec/cors.ts';
 import testHuman from '../utils/spec/human.ts';
 import { beforeRequest, request } from '../utils/spec/request.ts';
@@ -20,22 +21,22 @@ describe('/stats', () => {
         });
         it('returns a JSON body that is a stats object', async () => {
             expect(response.headers.get('Content-Type')).to.match(/application\/json/);
-            expect(await response.json()).to.be.an('object');
+            expect(await response.json<StatsResponse>()).to.be.an('object');
         });
         describe('cdnjs stats object', () => {
             it('is an object with the \'libraries\' property', async () => {
-                expect(await response.json()).to.have.property('libraries').that.is.an('number');
+                expect(await response.json<StatsResponse>()).to.have.property('libraries').that.is.an('number');
             });
             it('has no other properties', async () => {
-                expect(Object.keys(await response.json())).to.have.lengthOf(1);
+                expect(Object.keys(await response.json<StatsResponse>())).to.have.lengthOf(1);
             });
         });
 
         // Test with a trailing slash
         it('responds to requests with a trailing slash', async () => {
             const res = await request(path + '/');
             expect(res.status).to.eq(200);
-            expect(await res.json()).to.deep.equal(await response.json());
+            expect(await res.json<StatsResponse>()).to.deep.equal(await response.json<StatsResponse>());
         });
     });
 

src/routes/stats.ts

@@ -1,5 +1,6 @@
 import type { Context, Hono } from 'hono';
 
+import type { StatsResponse } from './stats.schema.ts';
 import cache from '../utils/cache.ts';
 import filter from '../utils/filter.ts';
 import { libraries } from '../utils/kvMetadata.ts';
@@ -27,7 +28,7 @@ const handleGetStats = async (ctx: Context) => {
     cache(ctx, 6 * 60 * 60);
 
     // Send the response
-    return respond(ctx, response);
+    return respond(ctx, response satisfies StatsResponse);
 };
 
 /**