[4.x] BroadcastingConfigBootstrapper: fix central instances persisting in tenant context

src/Bootstrappers/BroadcastingConfigBootstrapper.php

@@ -7,11 +7,19 @@
 use Illuminate\Broadcasting\BroadcastManager;
 use Illuminate\Config\Repository;
 use Illuminate\Contracts\Broadcasting\Broadcaster;
+use Illuminate\Contracts\Broadcasting\Factory as BroadcastingFactory;
 use Illuminate\Foundation\Application;
+use Illuminate\Support\Facades\Broadcast;
 use Stancl\Tenancy\Contracts\TenancyBootstrapper;
 use Stancl\Tenancy\Contracts\Tenant;
 use Stancl\Tenancy\Overrides\TenancyBroadcastManager;
 
+/**
+ * Maps tenant properties to broadcasting config and overrides
+ * the BroadcastManager binding with TenancyBroadcastManager.
+ *
+ * @see TenancyBroadcastManager
+ */
 class BroadcastingConfigBootstrapper implements TenancyBootstrapper
 {
     /**
@@ -54,7 +62,7 @@ public function __construct(
         protected Application $app
     ) {
         static::$broadcaster ??= $config->get('broadcasting.default');
-        static::$credentialsMap = array_merge(static::$credentialsMap, static::$mapPresets[static::$broadcaster] ?? []);
+        static::$credentialsMap = array_merge(static::$mapPresets[static::$broadcaster] ?? [], static::$credentialsMap);
     }
 
     public function bootstrap(Tenant $tenant): void
@@ -64,10 +72,35 @@ public function bootstrap(Tenant $tenant): void
 
         $this->setConfig($tenant);
 
-        // Make BroadcastManager resolve to a custom BroadcastManager which makes the broadcasters use the tenant credentials
+        // Make BroadcastManager resolve to TenancyBroadcastManager which always re-resolves the used broadcasters so that
+        // the credentials used by broadcasters are always up-to-date with the config when retrieving the broadcasters using
+        // the manager and gives the channels of the broadcaster from central context to the newly resolved broadcasters in tenant context.
         $this->app->extend(BroadcastManager::class, function (BroadcastManager $broadcastManager) {
-            return new TenancyBroadcastManager($this->app);
+            $originalCustomCreators = invade($broadcastManager)->customCreators;
+            $tenantBroadcastManager = new TenancyBroadcastManager($this->app);
+
+            // TenancyBroadcastManager inherits the custom driver creators registered in the central context so that
+            // custom drivers work in tenant context without having to re-register the creators manually.
+            foreach ($originalCustomCreators as $driver => $closure) {
+                $tenantBroadcastManager->extend($driver, $closure);
+            }
+
+            return $tenantBroadcastManager;
         });
+
+        // Swap currently bound Broadcaster instance for one that's resolved through the tenant BroadcastManager.
+        // Note that updating broadcasting config (credentials) in tenant context doesn't update the credentials
+        // used by the bound Broadcaster instance. If you need to e.g. send a notification in response to
+        // updating tenant's broadcasting credentials in tenant context, it's recommended to
+        // reinitialize tenancy after updating the credentials.
+        $this->app->extend(Broadcaster::class, function () {
+            return $this->app->make(BroadcastManager::class)->connection();
+        });
+
+        // Clear the resolved Broadcast facade's Illuminate\Contracts\Broadcasting\Factory instance
+        // so that it gets re-resolved as TenancyBroadcastManager instead of the central BroadcastManager
+        // when used. E.g. the Broadcast::auth() call in BroadcastController::authenticate (/broadcasting/auth).
+        Broadcast::clearResolvedInstance(BroadcastingFactory::class);
     }
 
     public function revert(): void
@@ -76,6 +109,9 @@ public function revert(): void
         $this->app->singleton(BroadcastManager::class, fn (Application $app) => $this->originalBroadcastManager);
         $this->app->singleton(Broadcaster::class, fn (Application $app) => $this->originalBroadcaster);
 
+        // Clear the resolved Broadcast facade instance so that it gets re-resolved as the central BroadcastManager
+        Broadcast::clearResolvedInstance(BroadcastingFactory::class);
+
         $this->unsetConfig();
     }
 

src/Overrides/TenancyBroadcastManager.php

@@ -7,26 +7,37 @@
 use Illuminate\Broadcasting\Broadcasters\Broadcaster;
 use Illuminate\Broadcasting\BroadcastManager;
 use Illuminate\Contracts\Broadcasting\Broadcaster as BroadcasterContract;
-use Illuminate\Contracts\Foundation\Application;
 
+/**
+ * BroadcastManager override that always re-resolves the broadcasters in static::$tenantBroadcasters
+ * when attempting to retrieve them and passes the channels of the original (central) broadcaster
+ * to the newly resolved (tenant) broadcasters.
+ *
+ * Affects calls that use app(BroadcastManager::class)->get().
+ *
+ * @see Stancl\Tenancy\Bootstrappers\BroadcastingConfigBootstrapper
+ */
 class TenancyBroadcastManager extends BroadcastManager
 {
     /**
-     * Names of broadcasters to always recreate using $this->resolve() (even when they're
-     * cached and available in the $broadcasters property).
-     *
-     * The reason for recreating the broadcasters is
-     * to make your app use the correct broadcaster credentials when tenancy is initialized.
+     * Names of broadcasters that
+     * - should always be recreated using $this->resolve(), even when they're cached and available
+     *   in $this->drivers so that when you update broadcasting config in the tenant context,
+     *   the updated config/credentials will be used for broadcasting immediately.
+     *   Note that in cases like this, only direct config changes are reflected right away.
+     *   For the broadcasters to reflect tenant property changes made in tenant context,
+     *   you still have to reinitialize tenancy after updating the tenant properties intended
+     *   to be mapped to broadcasting config, since the properties are only mapped to config
+     *   on BroadcastingConfigBootstrapper::bootstrap().
+     * - should inherit the original broadcaster's channels (= the channels registered in
+     *   the central context, e.g. in routes/channels.php, before this manager overrides the bound BroadcastManager).
      */
-    public static array $tenantBroadcasters = ['pusher', 'ably'];
+    public static array $tenantBroadcasters = ['pusher', 'ably', 'reverb'];
 
     /**
-     * Override the get method so that the broadcasters in $tenantBroadcasters
-     * always get freshly resolved even when they're cached and available in the $broadcasters property,
-     * and that the resolved broadcaster will override the BroadcasterContract::class singleton.
-     *
-     * If there's a cached broadcaster with the same name as $name,
-     * give its channels to the newly resolved bootstrapper.
+     * Override the get method so that the broadcasters in static::$tenantBroadcasters
+     * - receive the original (central) broadcaster's channels
+     * - always get freshly resolved.
      */
     protected function get($name)
     {
@@ -35,24 +46,27 @@ protected function get($name)
             $originalBroadcaster = $this->app->make(BroadcasterContract::class);
             $newBroadcaster = $this->resolve($name);
 
-            // If there is a current broadcaster, give its channels to the newly resolved one
+            // Give the channels of the original (central) broadcaster to the newly resolved one.
+            //
             // Broadcasters only have to implement the Illuminate\Contracts\Broadcasting\Broadcaster contract
-            // Which doesn't require the channels property
-            // So passing the channels is only needed for Illuminate\Broadcasting\Broadcasters\Broadcaster instances
+            // which doesn't require the channels property, so passing the channels is only needed for
+            // Illuminate\Broadcasting\Broadcasters\Broadcaster instances (= all the default broadcasters, e.g. PusherBroadcaster).
             if ($originalBroadcaster instanceof Broadcaster && $newBroadcaster instanceof Broadcaster) {
                 $this->passChannelsFromOriginalBroadcaster($originalBroadcaster, $newBroadcaster);
             }
 
-            $this->app->singleton(BroadcasterContract::class, fn (Application $app) => $newBroadcaster);
-
             return $newBroadcaster;
         }
 
         return parent::get($name);
     }
 
-    // Because, unlike the original broadcaster, the newly resolved broadcaster won't have the channels registered using routes/channels.php
-    // Using it for broadcasting won't work, unless we make it have the original broadcaster's channels
+    /**
+     * The newly resolved broadcasters don't automatically receive the channels registered
+     * in central context (e.g. Broadcast::channel() in routes/channels.php), so the channels
+     * have to be obtained from the original (central) broadcaster and manually passed to the new broadcasters
+     * (broadcasting using a broadcaster with no channels results in a 403 error on Broadcast::auth()).
+     */
     protected function passChannelsFromOriginalBroadcaster(Broadcaster $originalBroadcaster, Broadcaster $newBroadcaster): void
     {
         // invade() because channels can't be retrieved through any of the broadcaster's public methods

tests/Bootstrappers/BroadcastChannelPrefixBootstrapperTest.php

@@ -16,6 +16,9 @@
 use Stancl\Tenancy\Bootstrappers\DatabaseTenancyBootstrapper;
 use Stancl\Tenancy\Bootstrappers\BroadcastChannelPrefixBootstrapper;
 use function Stancl\Tenancy\Tests\pest;
+use Illuminate\Broadcasting\Broadcasters\NullBroadcaster;
+use Illuminate\Support\Facades\Broadcast;
+use Illuminate\Support\Collection;
 
 beforeEach(function () {
     Event::listen(TenancyInitialized::class, BootstrapTenancy::class);
@@ -137,3 +140,96 @@ protected function formatChannels(array $channels)
     expect(app(BroadcastManager::class)->driver())->toBe($broadcaster);
     expect(invade(app(BroadcastManager::class)->driver())->formatChannels($channelNames))->toEqual($channelNames);
 });
+
+test('broadcasting channel helpers register channels correctly', function() {
+    config([
+        'broadcasting.default' => $driver = 'testing',
+        'broadcasting.connections.testing.driver' => $driver,
+    ]);
+
+    config(['tenancy.bootstrappers' => [DatabaseTenancyBootstrapper::class]]);
+
+    Schema::create('users', function (Blueprint $table) {
+        $table->increments('id');
+        $table->string('name');
+        $table->string('email')->unique();
+        $table->string('password');
+        $table->rememberToken();
+        $table->timestamps();
+    });
+
+    $centralUser = User::create(['name' => 'central', 'email' => 'test@central.cz', 'password' => 'test']);
+    $tenant = Tenant::create();
+
+    migrateTenants();
+
+    tenancy()->initialize($tenant);
+
+    // Same ID as $centralUser
+    $tenantUser = User::create(['name' => 'tenant', 'email' => 'test@tenant.cz', 'password' => 'test']);
+
+    tenancy()->end();
+
+    /** @var BroadcastManager $broadcastManager */
+    $broadcastManager = app(BroadcastManager::class);
+
+    // Use a driver with no channels
+    $broadcastManager->extend($driver, fn () => new NullBroadcaster);
+
+    $getChannels = fn (): Collection => $broadcastManager->driver($driver)->getChannels();
+
+    expect($getChannels())->toBeEmpty();
+
+    // Basic channel registration
+    Broadcast::channel($channelName = 'user.{userName}', $channelClosure = function ($user, $userName) {
+        return User::firstWhere('name', $userName)?->is($user) ?? false;
+    });
+
+    // Check if the channel is registered
+    $centralChannelClosure = $getChannels()->first(fn ($closure, $name) => $name === $channelName);
+    expect($centralChannelClosure)->not()->toBeNull();
+
+    // Channel closures work as expected (running in central context)
+    expect($centralChannelClosure($centralUser, $centralUser->name))->toBeTrue();
+    expect($centralChannelClosure($centralUser, $tenantUser->name))->toBeFalse();
+
+    // Register a tenant broadcasting channel (almost identical to the original channel, just able to accept the tenant key)
+    tenant_channel($channelName, $channelClosure);
+
+    // Tenant channel registered – its name is correctly prefixed ("{tenant}.user.{userId}")
+    $tenantChannelClosure = $getChannels()->first(fn ($closure, $name) => $name === "{tenant}.$channelName");
+    expect($tenantChannelClosure)->toBe($centralChannelClosure);
+
+    // The tenant channels are prefixed with '{tenant}.'
+    // They accept the tenant key, but their closures only run in tenant context when tenancy is initialized
+    // The regular channels don't accept the tenant key, but they also respect the current context
+    // The tenant key is used solely for the name prefixing – the closures can still run in the central context
+    tenant_channel($channelName, $tenantChannelClosure = function ($user, $tenant, $userName) {
+        return User::firstWhere('name', $userName)?->is($user) ?? false;
+    });
+
+    expect($tenantChannelClosure)->not()->toBe($centralChannelClosure);
+
+    expect($tenantChannelClosure($centralUser, $tenant->getTenantKey(), $centralUser->name))->toBeTrue();
+    expect($tenantChannelClosure($centralUser, $tenant->getTenantKey(), $tenantUser->name))->toBeFalse();
+
+    tenancy()->initialize($tenant);
+
+    // The channel closure runs in the tenant context
+    // Only the tenant user is available
+    expect($tenantChannelClosure($centralUser, $tenant->getTenantKey(), $tenantUser->name))->toBeFalse();
+    expect($tenantChannelClosure($tenantUser, $tenant->getTenantKey(), $tenantUser->name))->toBeTrue();
+
+    // Use a new channel instance to delete the previously registered channels before testing the global_channel helper
+    $broadcastManager->purge($driver);
+    $broadcastManager->extend($driver, fn () => new NullBroadcaster);
+
+    expect($getChannels())->toBeEmpty();
+
+    // Global channel helper prefixes the channel name with 'global__'
+    global_channel($channelName, $channelClosure);
+
+    // Channel prefixed with 'global__' found
+    $foundChannelClosure = $getChannels()->first(fn ($closure, $name) => $name === 'global__' . $channelName);
+    expect($foundChannelClosure)->not()->toBeNull();
+});