Convert domains to lowercase, persist current domain model on resolver

CONTRIBUTING.md

@@ -1,14 +1,11 @@
 # Contributing
 
 ## Code style
+
 StyleCI will flag code style violations in your pull requests.
 
 ## Running tests
 
-### With Docker
-If you have Docker installed, simply run ./fulltest. When you're done testing, run docker-compose down to shut down the containers.
+Run `docker-compose up-d` to start the containers. Then run `./test` to run the tests.
 
-### Without Docker
-If you run the tests of this package, please make sure you don't store anything in Redis @ 127.0.0.1:6379 db#14. The contents of this database are flushed everytime the tests are run.
-
-Some tests are run only if the `CONTINUOUS_INTEGRATION` or `DOCKER` environment variables are set to true. This is to avoid things like bloating your MySQL instance with test databases.
+When you're done testing, run `docker-compose down` to shut down the containers.

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')) {

tests/DomainTest.php

@@ -7,6 +7,7 @@ namespace Stancl\Tenancy\Tests;
 use Illuminate\Support\Facades\Route;
 use Stancl\Tenancy\Database\Concerns\HasDomains;
 use Stancl\Tenancy\Database\Models;
+use Stancl\Tenancy\Database\Models\Domain;
 use Stancl\Tenancy\Exceptions\DomainOccupiedByOtherTenantException;
 use Stancl\Tenancy\Exceptions\TenantCouldNotBeIdentifiedOnDomainException;
 use Stancl\Tenancy\Middleware\InitializeTenancyByDomain;
@@ -103,6 +104,18 @@ class DomainTest extends TestCase
             ->get('http://foo.localhost/foo/abc/xyz')
             ->assertSee('foo');
     }
+
+    /** @test */
+    public function domains_are_always_lowercase()
+    {
+        $tenant = DomainTenant::create();
+
+        $tenant->domains()->create([
+            'domain' => 'CAPITALS',
+        ]);
+
+        $this->assertSame('capitals', Domain::first()->domain);
+    }
 }
 
 class DomainTenant extends Models\Tenant