Convert domains to lowercase, persist current domain model on resolver

src/Database/Concerns/ConvertsDomainsToLowercase.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace Stancl\Tenancy\Database\Concerns;
+
+trait ConvertsDomainsToLowercase
+{
+    public static function bootConvertsDomainsToLowercase()
+    {
+        static::saving(function ($model) {
+            $model->domain = strtolower($model->domain);
+        });
+    }
+}

src/Database/Models/Domain.php

@@ -20,6 +20,7 @@ class Domain extends Model implements Contracts\Domain
 {
     use Concerns\CentralConnection,
         Concerns\EnsuresDomainIsNotOccupied,
+        Concerns\ConvertsDomainsToLowercase,
         Concerns\InvalidatesTenantsResolverCache;
 
     protected $guarded = [];

src/Resolvers/DomainTenantResolver.php

@@ -10,6 +10,13 @@ use Stancl\Tenancy\Exceptions\TenantCouldNotBeIdentifiedOnDomainException;
 
 class DomainTenantResolver extends Contracts\CachedTenantResolver
 {
+    /**
+     * The model representing the domain that the tenant was identified on.
+     *
+     * @var Domain
+     */
+    public static $currentDomain;
+
     /** @var bool */
     public static $shouldCache = false;
 

src/TenancyServiceProvider.php

@@ -8,6 +8,7 @@ use Illuminate\Cache\CacheManager;
 use Illuminate\Support\ServiceProvider;
 use Stancl\Tenancy\Bootstrappers\FilesystemTenancyBootstrapper;
 use Stancl\Tenancy\Contracts\Tenant;
+use Stancl\Tenancy\Resolvers\DomainTenantResolver;
 
 class TenancyServiceProvider extends ServiceProvider
 {
@@ -39,6 +40,10 @@ class TenancyServiceProvider extends ServiceProvider
             return $app[Tenancy::class]->tenant;
         });
 
+        $this->app->bind(Domain::class, function () {
+            return DomainTenantResolver::$currentDomain;
+        });
+
         // Make sure bootstrappers are stateful (singletons).
         foreach ($this->app['config']['tenancy.bootstrappers'] ?? [] as $bootstrapper) {
             if (method_exists($bootstrapper, '__constructStatic')) {