fix(files): resolve file id route params

src/app/api/files/[fileId]/route.js

@@ -3,6 +3,10 @@ import { NextResponse } from 'next/server';
 import { createSupabaseServerClient } from '@/lib/supabase.js';
 import { postQuantumEncryption } from '@/lib/crypto/post-quantum-encryption.js';
 
+async function resolveRouteParams(params) {
+	return (await params) || {};
+}
+
 export async function GET(request, { params } = {}) {
 	try {
 		// Create Supabase server client
@@ -14,7 +18,7 @@ export async function GET(request, { params } = {}) {
 			return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
 		}
 
-		const fileId = params.fileId;
+		const { fileId } = await resolveRouteParams(params);
 		console.log(`📁 [FILE-DOWNLOAD] Download request from auth user: ${user.id} for file: ${fileId}`);
 
 		// Get the internal user ID from the users table using auth_user_id
@@ -117,7 +121,7 @@ export async function GET(request, { params } = {}) {
 				const metadataObj = JSON.parse(decryptedMetadata);
 				mimeType = metadataObj.mimeType || 'application/octet-stream';
 			}
-		} catch (metaError) {
+		} catch {
 			console.warn('📁 [FILE-DOWNLOAD] Could not decrypt metadata for mimeType');
 		}
 
@@ -146,7 +150,7 @@ export async function GET(request, { params } = {}) {
 }
 
 // Get file info without downloading the actual file content
-export async function HEAD(event) {
+export async function HEAD(request, { params } = {}) {
 	try {
 		// Create Supabase server client
 		const supabase = await createSupabaseServerClient();
@@ -158,7 +162,7 @@ export async function HEAD(event) {
 		}
 
 		const userId = user.id;
-		const fileId = params.fileId;
+		const { fileId } = await resolveRouteParams(params);
 
 		// Get file metadata from database
 		const { data: fileData, error: fileError } = await supabase
@@ -212,7 +216,7 @@ export async function POST(request, { params } = {}) {
 		}
 
 		const userId = user.id;
-		const fileId = params.fileId;
+		const { fileId } = await resolveRouteParams(params);
 
 		console.log(`📁 [FILE-INFO] Info request from user: ${userId} for file: ${fileId}`);
 
@@ -259,10 +263,3 @@ export async function POST(request, { params } = {}) {
 	}
 }
 
-function formatFileSize(bytes) {
-	if (bytes === 0) return '0 Bytes';
-	const k = 1024;
-	const sizes = ['Bytes', 'KB', 'MB', 'GB'];
-	const i = Math.floor(Math.log(bytes) / Math.log(k));
-	return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i];
-}

src/app/api/files/[fileId]/route.test.js

@@ -0,0 +1,83 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+const mocks = vi.hoisted(() => ({
+	authGetUser: vi.fn(),
+	from: vi.fn(),
+	eq: vi.fn()
+}));
+
+vi.mock('@/lib/supabase.js', () => ({
+	createSupabaseServerClient: vi.fn(async () => ({
+		auth: {
+			getUser: mocks.authGetUser
+		},
+		from: mocks.from
+	}))
+}));
+
+vi.mock('@/lib/crypto/post-quantum-encryption.js', () => ({
+	postQuantumEncryption: {
+		initialize: vi.fn(),
+		decryptFromSender: vi.fn()
+	}
+}));
+
+function createFileQuery() {
+	const query = {
+		select: vi.fn(() => query),
+		eq: mocks.eq,
+		single: vi.fn().mockResolvedValue({
+			data: {
+				id: 'file-1',
+				message_id: 'message-1',
+				encrypted_metadata: {},
+				created_at: '2026-01-01T00:00:00.000Z',
+				created_by: 'user-1',
+				messages: [{ conversation_id: 'conversation-1' }]
+			},
+			error: null
+		})
+	};
+	mocks.eq.mockReturnValue(query);
+	return query;
+}
+
+describe('/api/files/[fileId]', () => {
+	beforeEach(() => {
+		vi.resetModules();
+		vi.clearAllMocks();
+
+		mocks.authGetUser.mockResolvedValue({
+			data: { user: { id: 'user-1' } },
+			error: null
+		});
+		mocks.from.mockImplementation((table) => {
+			if (table === 'encrypted_files') return createFileQuery();
+			throw new Error(`Unexpected table: ${table}`);
+		});
+	});
+
+	it('resolves async route params for HEAD metadata requests', async () => {
+		const { HEAD } = await import('./route.js');
+		const response = await HEAD(new Request('https://qrypt.chat/api/files/file-1'), {
+			params: Promise.resolve({ fileId: 'file-1' })
+		});
+
+		expect(response.status).toBe(200);
+		expect(response.headers.get('Content-Type')).toBe('application/octet-stream');
+		expect(mocks.eq).toHaveBeenCalledWith('id', 'file-1');
+	});
+
+	it('resolves async route params for POST metadata requests', async () => {
+		const { POST } = await import('./route.js');
+		const response = await POST(new Request('https://qrypt.chat/api/files/file-1', { method: 'POST' }), {
+			params: Promise.resolve({ fileId: 'file-1' })
+		});
+		const body = await response.json();
+
+		expect(response.status).toBe(200);
+		expect(body.id).toBe('file-1');
+		expect(body.conversationId).toBe('conversation-1');
+		expect(mocks.eq).toHaveBeenCalledWith('id', 'file-1');
+	});
+});