Sicherhaven/Eventify-frontend
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feat: add guest mode — browse events without login

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New file: lib/core/auth/auth_guard.dart
  Static AuthGuard class with isGuest flag and requireLogin() helper
  that shows a login prompt bottom sheet when guests try protected actions.

login_screen.dart / desktop_login_screen.dart:
  Added "Continue as Guest" button below sign-up link.
  Sets AuthGuard.isGuest = true, then navigates to HomeScreen.

api_client.dart:
  _buildAuthBody() and GET auth check no longer throw when token is missing.
  If no token (guest), request proceeds without auth — backend decides.

home_screen.dart:
  Bottom nav guards: tapping Contribute (index 2) or Profile (index 3)
  as guest shows login prompt instead of navigating.

auth_service.dart:
  AuthGuard.setGuest(false) called on successful login AND register
  so guest flag is always cleared when user authenticates.

Guest CAN: browse home, calendar, search, filter, view event details.
Guest CANNOT: contribute, view profile, book events (prompts login).
This commit is contained in:
Sicherhaven
2026-03-20 22:40:50 +05:30
parent cf21e0a58c
commit cac2671fd6
6 changed files with 130 additions and 12 deletions
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19
lib/core/api/api_client.dart
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@@ -81,11 +81,11 @@ class ApiClient {
if (requiresAuth) {
final token = await TokenStorage.getToken();
final username = await TokenStorage.getUsername();
if (token == null || username == null) {
throw Exception('Authentication required');
if (token != null && username != null) {
finalParams['token'] = token;
finalParams['username'] = username;
}
finalParams['token'] = token;
finalParams['username'] = username;
// Guest mode: proceed without token — let backend decide
}
if (params != null) finalParams.addAll(params);
@@ -103,7 +103,7 @@ class ApiClient {
return _handleResponse(url, response, finalParams);
}
/// Build request body and attach token + username if required
/// Build request body and attach token + username if available
Future<Map<String, dynamic>> _buildAuthBody(Map<String, dynamic>? body, bool requiresAuth) async {
final Map<String, dynamic> finalBody = {};
@@ -111,12 +111,11 @@ class ApiClient {
final token = await TokenStorage.getToken();
final username = await TokenStorage.getUsername();
if (token == null || username == null) {
throw Exception('Authentication required');
if (token != null && username != null) {
finalBody['token'] = token;
finalBody['username'] = username;
}
finalBody['token'] = token;
finalBody['username'] = username;
// Guest mode: proceed without token — let backend decide
}
if (body != null) finalBody.addAll(body);