feat: add deployment env based rate limiters

src/config/ratelimit.ts

@@ -1,11 +1,28 @@
 import { rateLimiter } from "hono-rate-limiter";
-import { getConnInfo } from "@hono/node-server/conninfo";
+import { getConnInfo as vercelGetConnInfo } from "hono/vercel";
-import { env } from "./env.js";
+import { getConnInfo as cfWorkersGetConnInfo } from "hono/cloudflare-workers";
+import { getConnInfo as nodejsGetConnInfo } from "@hono/node-server/conninfo";
+import type { GetConnInfo } from "hono/conninfo";
+import { DeploymentEnv, env } from "./env.js";
+
+let getConnInfo: GetConnInfo;
+switch (env.ANIWATCH_API_DEPLOYMENT_ENV) {
+    case DeploymentEnv.VERCEL:
+        getConnInfo = vercelGetConnInfo;
+        break;
+    case DeploymentEnv.CLOUDFLARE_WORKERS:
+        getConnInfo = cfWorkersGetConnInfo;
+        break;
+    default:
+        getConnInfo = nodejsGetConnInfo;
+        break;
+}
 
 export const ratelimit = rateLimiter({
-    windowMs: env.ANIWATCH_API_WINDOW_MS,
-    limit: env.ANIWATCH_API_MAX_REQS,
     standardHeaders: "draft-7",
+    limit: env.ANIWATCH_API_MAX_REQS,
+    windowMs: env.ANIWATCH_API_WINDOW_MS,
+
     keyGenerator(c) {
         const { remote } = getConnInfo(c);
         const key =
@@ -14,9 +31,10 @@ export const ratelimit = rateLimiter({
 
         return key;
     },
-    handler: (c) =>
+    handler(c) {
-        c.json(
+        return c.json(
             { status: 429, message: "Too Many Requests 😵" },
             { status: 429 }
-        ),
+        );
+    },
 });