Add admin db-info endpoint for debugging

Author: PaulJPhilp

packages/mcp-server/app/api/db-info/route.ts

@@ -0,0 +1,65 @@
+/**
+ * Database info endpoint (Admin only)
+ *
+ * Returns sanitized DB connection info + a simple SELECT 1.
+ */
+
+import { createDatabase } from "@effect-patterns/toolkit";
+import { sql } from "drizzle-orm";
+import { Effect } from "effect";
+import { type NextRequest, NextResponse } from "next/server";
+import { validateAdminKey } from "../../../src/auth/adminAuth";
+import { runWithRuntime } from "../../../src/server/init";
+import { errorHandler } from "../../../src/server/errorHandler";
+
+function sanitizeDatabaseUrl(url: string) {
+  try {
+    const parsed = new URL(url);
+    return {
+      protocol: parsed.protocol.replace(":", ""),
+      host: parsed.host,
+      database: parsed.pathname.replace("/", "") || undefined,
+      search: parsed.search || undefined,
+    };
+  } catch {
+    return { host: "invalid-url" };
+  }
+}
+
+const handleDbInfo = Effect.fn("db-info")(function* (request: NextRequest) {
+  yield* validateAdminKey(request);
+
+  const dbUrl = process.env.DATABASE_URL;
+  if (!dbUrl) {
+    return yield* Effect.fail(
+      new Error("DATABASE_URL not configured on server")
+    );
+  }
+
+  const result = yield* Effect.gen(function* () {
+    const { db, close } = createDatabase(dbUrl);
+    const testQuery = yield* Effect.tryPromise(async () => {
+      return await db.execute(sql`SELECT 1 as test`);
+    });
+    yield* Effect.promise(() => close());
+    return testQuery;
+  });
+
+  return {
+    success: true,
+    database: sanitizeDatabaseUrl(dbUrl),
+    testResult: result,
+  };
+});
+
+export async function GET(request: NextRequest) {
+  const result = await runWithRuntime(
+    handleDbInfo(request).pipe(Effect.catchAll((error) => errorHandler(error)))
+  );
+
+  if (result instanceof Response) {
+    return result;
+  }
+
+  return NextResponse.json(result, { status: 200 });
+}