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This commit is contained in:
Christien Rioux 2023-07-22 23:29:10 -04:00
parent 08dab73757
commit c08878b35a
39 changed files with 771 additions and 218 deletions
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51
lib/router/router_notifier.dart
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@ -3,56 +3,42 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import '../pages/pages.dart';
import '../state/active_logins_state.dart';
import '../providers/logins.dart';
/// This notifier is meant to implement the [Listenable] our [GoRouter] needs.
///
/// We aim to trigger redirects whenever's needed.
/// This is done by calling our (only) listener everytime we want to notify stuff.
/// This allows to centralize global redirecting logic in this class.
/// In this simple case, we just listen to auth changes.
///
/// SIDE NOTE.
/// This might look overcomplicated at a first glance;
/// Instead, this method aims to follow some good some good practices:
/// 1. It doesn't require us to pipe down any `ref` parameter
/// 2. It works as a complete replacement for [ChangeNotifier] (it's a [Listenable] implementation)
/// 3. It allows for listening to multiple providers if needed (we do have a [Ref] now!)
class RouterNotifier extends AutoDisposeAsyncNotifier<void>
implements Listenable {
/// GoRouter listener
VoidCallback? routerListener;
bool isAuth = false; // Useful for our global redirect function
/// Router state for redirect
bool hasActiveUserLogin = false;
/// AsyncNotifier build
@override
Future<void> build() async {
// One could watch more providers and write logic accordingly
isAuth = await ref.watch(
authNotifierProvider.selectAsync((data) => data != null),
hasActiveUserLogin = await ref.watch(
loginsProvider.selectAsync((data) => data.activeUserLogin != null),
);
// When this notifier's state changes, inform GoRouter
ref.listenSelf((_, __) {
// One could write more conditional logic for when to call redirection
if (state.isLoading) return;
routerListener?.call();
});
}
/// Redirects the user when our authentication changes
/// Redirects when our state changes
String? redirect(BuildContext context, GoRouterState state) {
if (this.state.isLoading || this.state.hasError) return null;
final isIndex = state.location == IndexPage.path;
if (isIndex) {
return isAuth ? HomePage.path : LoginPage.path;
switch (state.location) {
case IndexPage.path:
return hasActiveUserLogin ? HomePage.path : LoginPage.path;
case LoginPage.path:
return hasActiveUserLogin ? HomePage.path : null;
default:
return hasActiveUserLogin ? null : LoginPage.path;
}
final isLoggingIn = state.location == LoginPage.path;
if (isLoggingIn) {
return isAuth ? HomePage.path : null;
}
return isAuth ? null : IndexPage.path;
}
/// Our application routes
@ -103,6 +89,9 @@ class RouterNotifier extends AutoDisposeAsyncNotifier<void>
),
];
///////////////////////////////////////////////////////////////////////////
/// Listenable
/// Adds [GoRouter]'s listener as specified by its [Listenable].
/// [GoRouteInformationProvider] uses this method on creation to handle its
/// internal [ChangeNotifier].