refactor(dns): move to core package (#4687)

packages/core/package.json

@@ -17,7 +17,8 @@
     "./infrastructure/certificates": "./src/infrastructure/certificates/index.ts",
     "./infrastructure/certificates/hostnames/db/sqlite": "./src/infrastructure/certificates/hostnames/db/sqlite.ts",
     "./infrastructure/certificates/hostnames/db/mysql": "./src/infrastructure/certificates/hostnames/db/mysql.ts",
-    "./infrastructure/certificates/hostnames/db/postgresql": "./src/infrastructure/certificates/hostnames/db/postgresql.ts"
+    "./infrastructure/certificates/hostnames/db/postgresql": "./src/infrastructure/certificates/hostnames/db/postgresql.ts",
+    "./infrastructure/dns/init": "./src/infrastructure/dns/init.ts"
   },
   "typesVersions": {
     "*": {
@@ -36,6 +37,7 @@
   "dependencies": {
     "@t3-oss/env-nextjs": "^0.13.8",
     "better-sqlite3": "^12.5.0",
+    "dns-caching": "^0.2.9",
     "drizzle-orm": "^0.45.1",
     "ioredis": "5.8.2",
     "mysql2": "3.15.3",

packages/core/src/infrastructure/dns/env.ts

@@ -0,0 +1,8 @@
+import { createBooleanSchema, createEnv } from "../env";
+
+export const dnsEnv = createEnv({
+  server: {
+    ENABLE_DNS_CACHING: createBooleanSchema(false),
+  },
+  experimental__runtimeEnv: process.env,
+});

packages/core/src/infrastructure/dns/init.ts

@@ -0,0 +1,28 @@
+import { DnsCacheManager } from "dns-caching";
+
+import { createLogger } from "@homarr/core/infrastructure/logs";
+
+import { dnsEnv } from "./env";
+
+// Add global type augmentation for homarr
+declare global {
+  var homarr: {
+    dnsCacheManager?: DnsCacheManager;
+    // add other properties if needed
+  };
+}
+
+const logger = createLogger({ module: "dns" });
+
+// Initialize global.homarr if not present
+// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+global.homarr ??= {};
+global.homarr.dnsCacheManager ??= new DnsCacheManager({
+  cacheMaxEntries: 1000,
+  forceMinTtl: 5 * 60 * 1000, // 5 minutes
+  logger,
+});
+
+if (dnsEnv.ENABLE_DNS_CACHING) {
+  global.homarr.dnsCacheManager.initialize();
+}