first commit

lib/db/index.ts

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+import { drizzle } from "drizzle-orm/postgres-js";
+import postgres from "postgres";
+import * as schema from "./schema";
+
+const connectionString = process.env.DATABASE_URL;
+
+let client: ReturnType<typeof postgres> | null = null;
+let db: ReturnType<typeof drizzle<typeof schema>> | null = null;
+
+export function getDb() {
+  if (!connectionString) {
+    throw new Error("DATABASE_URL is not set");
+  }
+
+  if (!client) {
+    client = postgres(connectionString, { max: 10 });
+    db = drizzle(client, { schema });
+  }
+
+  return db!;
+}
+
+export async function checkDbConnection(): Promise<boolean> {
+  if (!connectionString) {
+    return false;
+  }
+
+  try {
+    const probe = postgres(connectionString, { max: 1 });
+    await probe`SELECT 1`;
+    await probe.end();
+    return true;
+  } catch {
+    return false;
+  }
+}