added basic user auth flow

app/api/auth/login/route.ts

@@ -0,0 +1,88 @@
+// app/app/api/auth/login/route.ts
+import { NextRequest, NextResponse } from "next/server";
+import { setAuthCookies } from "@/lib/auth-cookies";
+
+const BASE = process.env.DIRECTUS_URL!;
+const ADMIN_TOKEN = process.env.DIRECTUS_TOKEN_ADMIN_REGISTER!; // for username→email lookup
+
+type DirectusList<T> = { data: T[] };
+type LoginResp = { data: { access_token: string; refresh_token: string; expires: number } };
+type MeResp = { data: { id: string; email: string | null; username?: string | null } };
+
+async function adminFetch<T=any>(path: string, init?: RequestInit): Promise<T> {
+    const res = await fetch(`${BASE}${path}`, {
+        ...init,
+        headers: {
+            "Accept": "application/json",
+            "Content-Type": "application/json",
+            "Authorization": `Bearer ${ADMIN_TOKEN}`,
+            ...(init?.headers || {}),
+        },
+    });
+    const text = await res.text();
+    const json = text ? JSON.parse(text) : null;
+    if (!res.ok) throw new Error(`Directus ${res.status}: ${text || res.statusText}`);
+    return (json ?? {}) as T;
+}
+
+async function directusLogin(email: string, password: string): Promise<LoginResp["data"]> {
+    const res = await fetch(`${BASE}/auth/login`, {
+        method: "POST",
+        headers: { "Accept": "application/json", "Content-Type": "application/json" },
+        body: JSON.stringify({ email, password }),
+    });
+    const text = await res.text();
+    const json = text ? JSON.parse(text) : null;
+    if (!res.ok) throw new Error(`Login failed: ${text || res.statusText}`);
+    return json.data;
+}
+
+function isEmailLike(s: string) {
+    return /^[^@\s]+@[^@\s]+\.[^@\s]+$/.test(s);
+}
+
+export async function POST(req: NextRequest) {
+    try {
+        const body = await req.json().catch(() => ({}));
+        const identifier: string = (body?.identifier ?? "").trim(); // username OR email
+        const password: string = (body?.password ?? "").trim();
+
+        if (!identifier || !password) {
+            return NextResponse.json({ error: "Missing identifier or password." }, { status: 400 });
+        }
+
+        let email = identifier;
+        let username: string | undefined = undefined;
+
+        if (!isEmailLike(identifier)) {
+            // lookup email by username (custom field on directus_users)
+            const q = `/users?limit=1&filter[username][_eq]=${encodeURIComponent(identifier)}&fields=id,email,username`;
+            const found = await adminFetch<DirectusList<{id:string;email:string|null;username:string|null}>>(q);
+            const user = found.data?.[0];
+            if (!user?.email) return NextResponse.json({ error: "User not found." }, { status: 404 });
+            email = user.email;
+            username = user.username || undefined;
+        }
+
+        const tokens = await directusLogin(email, password);
+
+        // Fetch /users/me to confirm and obtain username (if email path)
+        const meRes = await fetch(`${BASE}/users/me?fields=id,email,username`, {
+            headers: { "Authorization": `Bearer ${tokens.access_token}`, "Accept": "application/json" },
+        });
+        const meText = await meRes.text();
+        const me: MeResp = meText ? JSON.parse(meText) : { data: { id: "", email: null, username: null } };
+
+        const user = {
+            id: String(me?.data?.id || ""),
+            email: me?.data?.email ?? null,
+            username: (me?.data?.username as string | null) ?? username ?? email.split("@")[0],
+        };
+
+        let res = NextResponse.json({ ok: true, user });
+        res = setAuthCookies(res, tokens, user);
+        return res;
+    } catch (err: any) {
+        return NextResponse.json({ error: err?.message || "Login failed" }, { status: 401 });
+    }
+}