feat(auth): enterprise authentication and user management

frontend/athena/app/api/login/route.ts

@@ -0,0 +1,68 @@
+import { NextRequest, NextResponse } from "next/server";
+
+import {
+  getHermesUrl,
+  readJson,
+  setAuthCookie,
+  upstreamConfigurationErrorResponse,
+  upstreamUnavailableResponse,
+} from "@/lib/server/hermes";
+import { assertSameOrigin } from "@/lib/server/request-guards";
+
+type HermesLoginResponse = {
+  access_token: string;
+  expires_in: number;
+  user: {
+    id: number;
+    username: string;
+    email: string;
+  };
+};
+
+export async function POST(request: NextRequest) {
+  const originError = assertSameOrigin(request);
+
+  if (originError) {
+    return originError;
+  }
+
+  const credentials = await request.json();
+  const hermesUrl = getHermesUrl();
+
+  if (!hermesUrl) {
+    return upstreamConfigurationErrorResponse();
+  }
+
+  let hermesResponse: Response;
+
+  try {
+    hermesResponse = await fetch(`${hermesUrl}/auth/login`, {
+      method: "POST",
+      headers: {
+        "Content-Type": "application/json",
+        Accept: "application/json",
+      },
+      body: JSON.stringify(credentials),
+      cache: "no-store",
+    });
+  } catch {
+    return upstreamUnavailableResponse();
+  }
+
+  const data = await readJson(hermesResponse);
+
+  if (!hermesResponse.ok) {
+    return NextResponse.json(data, {
+      status: hermesResponse.status,
+    });
+  }
+
+  const loginData = data as HermesLoginResponse;
+  const response = NextResponse.json({
+    user: loginData.user,
+  });
+
+  setAuthCookie(response, loginData.access_token, loginData.expires_in);
+
+  return response;
+}