fix: Title missing in thread list for threads starting with attachment in E2EE rooms

.changeset/moody-phones-admire.md

@@ -0,0 +1,5 @@
+---
+"@rocket.chat/meteor": patch
+---
+
+Fixes title missing in thread list for threads starting with attachment in E2EE rooms

apps/meteor/client/hooks/useDecryptedMessage.spec.ts

@@ -0,0 +1,86 @@
+import { isE2EEMessage } from '@rocket.chat/core-typings';
+import { renderHook, waitFor } from '@testing-library/react';
+
+import { e2e } from '../../app/e2e/client/rocketchat.e2e';
+import { useDecryptedMessage } from './useDecryptedMessage';
+
+// Mock the dependencies
+jest.mock('@rocket.chat/core-typings', () => ({
+	isE2EEMessage: jest.fn(),
+}));
+
+jest.mock('../../app/e2e/client/rocketchat.e2e', () => ({
+	e2e: {
+		decryptMessage: jest.fn(),
+	},
+}));
+
+jest.mock('react-i18next', () => ({
+	useTranslation: () => ({
+		t: (key: string) => key,
+	}),
+}));
+
+describe('useDecryptedMessage', () => {
+	beforeEach(() => {
+		jest.clearAllMocks();
+	});
+
+	it('should return the original message for non-E2EE messages', () => {
+		(isE2EEMessage as jest.MockedFunction<typeof isE2EEMessage>).mockReturnValue(false);
+		const message = { msg: 'Hello, world!' };
+
+		const { result } = renderHook(() => useDecryptedMessage(message as any), { legacyRoot: true });
+
+		expect(result.current).toBe('Hello, world!');
+		expect(e2e.decryptMessage).not.toHaveBeenCalled();
+	});
+
+	it('should return decrypted message for E2EE messages', async () => {
+		(isE2EEMessage as jest.MockedFunction<typeof isE2EEMessage>).mockReturnValue(true);
+		(e2e.decryptMessage as jest.Mock).mockResolvedValue({ msg: 'Decrypted message' });
+		const message = { msg: 'Encrypted message' };
+		const { result } = renderHook(() => useDecryptedMessage(message as any), { legacyRoot: true });
+
+		await waitFor(() => {
+			expect(result.current).not.toBe('E2E_message_encrypted_placeholder');
+		});
+
+		expect(result.current).toBe('Decrypted message');
+		expect(e2e.decryptMessage).toHaveBeenCalledWith(message);
+	});
+
+	it('should handle E2EE messages with attachments', async () => {
+		(isE2EEMessage as jest.MockedFunction<typeof isE2EEMessage>).mockReturnValue(true);
+		(e2e.decryptMessage as jest.Mock).mockResolvedValue({
+			attachments: [{ description: 'Attachment description' }],
+		});
+		const message = { msg: 'Encrypted message with attachment' };
+
+		const { result } = renderHook(() => useDecryptedMessage(message as any), { legacyRoot: true });
+
+		await waitFor(() => {
+			expect(result.current).toBe('E2E_message_encrypted_placeholder');
+		});
+
+		expect(result.current).toBe('Attachment description');
+		expect(e2e.decryptMessage).toHaveBeenCalledWith(message);
+	});
+
+	it('should handle E2EE messages with attachments but no description', async () => {
+		(isE2EEMessage as jest.MockedFunction<typeof isE2EEMessage>).mockReturnValue(true);
+		(e2e.decryptMessage as jest.Mock).mockResolvedValue({
+			attachments: [{}],
+		});
+		const message = { msg: 'Encrypted message with attachment' };
+
+		const { result } = renderHook(() => useDecryptedMessage(message as any), { legacyRoot: true });
+
+		await waitFor(() => {
+			expect(result.current).toBe('E2E_message_encrypted_placeholder');
+		});
+
+		expect(result.current).toBe('Message_with_attachment');
+		expect(e2e.decryptMessage).toHaveBeenCalledWith(message);
+	});
+});

apps/meteor/client/hooks/useDecryptedMessage.ts

@@ -19,6 +19,14 @@ export const useDecryptedMessage = (message: IMessage): string => {
 			if (decryptedMsg.msg) {
 				setDecryptedMessage(decryptedMsg.msg);
 			}
+
+			if (decryptedMsg.attachments && decryptedMsg.attachments?.length > 0) {
+				if (decryptedMsg.attachments[0].description) {
+					setDecryptedMessage(decryptedMsg.attachments[0].description);
+				} else {
+					setDecryptedMessage(t('Message_with_attachment'));
+				}
+			}
 		});
 	}, [message, t, setDecryptedMessage]);