Implement proper update process

If the version in the settings table mismatches the code version, then we return a 503 error for all requests coming through index.php and api.php, while admin.php serves up a form prompting for the database password which will run outstanding migrations.

src/Update/Console/MigrateCommand.php

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+<?php
+/*
+ * This file is part of Flarum.
+ *
+ * (c) Toby Zerner <toby.zerner@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Flarum\Update\Console;
+
+use Flarum\Console\Command\AbstractCommand;
+use Illuminate\Contracts\Container\Container;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Output\OutputInterface;
+
+class MigrateCommand extends AbstractCommand
+{
+    /**
+     * @var Container
+     */
+    protected $container;
+
+    /**
+     * @param Container $container
+     */
+    public function __construct(Container $container)
+    {
+        $this->container = $container;
+
+        parent::__construct();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function configure()
+    {
+        $this
+            ->setName('migrate')
+            ->setDescription("Run outstanding migrations.");
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function fire()
+    {
+        $this->info('Migrating Flarum...');
+
+        $this->upgrade();
+
+        $this->info('DONE.');
+    }
+
+    public function upgrade()
+    {
+        $this->container->bind('Illuminate\Database\Schema\Builder', function ($container) {
+            return $container->make('Illuminate\Database\ConnectionInterface')->getSchemaBuilder();
+        });
+
+        $migrator = $this->container->make('Flarum\Database\Migrator');
+
+        $migrator->run(base_path('core/migrations'));
+
+        foreach ($migrator->getNotes() as $note) {
+            $this->info($note);
+        }
+
+        $extensions = $this->container->make('Flarum\Extension\ExtensionManager');
+
+        $migrator = $extensions->getMigrator();
+
+        foreach ($extensions->getInfo() as $name => $extension) {
+            if (! $extensions->isEnabled($name)) {
+                continue;
+            }
+
+            $this->info('Migrating extension: '.$name);
+
+            $extensions->migrate($name);
+
+            foreach ($migrator->getNotes() as $note) {
+                $this->info($note);
+            }
+        }
+
+        $this->container->make('Flarum\Settings\SettingsRepositoryInterface')->set('version', $this->container->version());
+    }
+}

src/Update/Controller/IndexController.php

@@ -0,0 +1,45 @@
+<?php
+/*
+ * This file is part of Flarum.
+ *
+ * (c) Toby Zerner <toby.zerner@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Flarum\Update\Controller;
+
+use Flarum\Http\Controller\AbstractHtmlController;
+use Psr\Http\Message\ServerRequestInterface as Request;
+use Illuminate\Contracts\View\Factory;
+
+class IndexController extends AbstractHtmlController
+{
+    /**
+     * @var Factory
+     */
+    protected $view;
+
+    /**
+     * @param Factory $view
+     */
+    public function __construct(Factory $view)
+    {
+        $this->view = $view;
+    }
+
+    /**
+     * @param Request $request
+     * @param array $routeParams
+     * @return \Psr\Http\Message\ResponseInterface
+     */
+    public function render(Request $request, array $routeParams = [])
+    {
+        $view = $this->view->make('flarum.update::app')->with('title', 'Update Flarum');
+
+        $view->with('content', $this->view->make('flarum.update::update'));
+
+        return $view;
+    }
+}

src/Update/Controller/UpdateController.php

@@ -0,0 +1,68 @@
+<?php
+/*
+ * This file is part of Flarum.
+ *
+ * (c) Toby Zerner <toby.zerner@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Flarum\Update\Controller;
+
+use Exception;
+use Flarum\Foundation\Application;
+use Flarum\Http\Controller\ControllerInterface;
+use Flarum\Update\Console\MigrateCommand;
+use Illuminate\Contracts\Bus\Dispatcher;
+use Psr\Http\Message\ServerRequestInterface as Request;
+use Symfony\Component\Console\Input\StringInput;
+use Symfony\Component\Console\Output\StreamOutput;
+use Zend\Diactoros\Response;
+use Zend\Diactoros\Response\HtmlResponse;
+
+class UpdateController implements ControllerInterface
+{
+    protected $command;
+
+    /**
+     * @var Application
+     */
+    protected $app;
+
+    /**
+     * @param MigrateCommand $command
+     * @param Application $app
+     */
+    public function __construct(MigrateCommand $command, Application $app)
+    {
+        $this->command = $command;
+        $this->app = $app;
+    }
+
+    /**
+     * @param Request $request
+     * @param array $routeParams
+     * @return \Psr\Http\Message\ResponseInterface
+     */
+    public function handle(Request $request, array $routeParams = [])
+    {
+        $input = $request->getParsedBody();
+
+        if (array_get($input, 'databasePassword') !== $this->app->config('database.password')) {
+            return new HtmlResponse('Incorrect database password.', 500);
+        }
+
+        $body = fopen('php://temp', 'wb+');
+        $input = new StringInput('');
+        $output = new StreamOutput($body);
+
+        try {
+            $this->command->run($input, $output);
+        } catch (Exception $e) {
+            return new HtmlResponse($e->getMessage(), 500);
+        }
+
+        return new Response($body, 200);
+    }
+}

src/Update/UpdateServiceProvider.php

@@ -0,0 +1,57 @@
+<?php
+/*
+ * This file is part of Flarum.
+ *
+ * (c) Toby Zerner <toby.zerner@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Flarum\Update;
+
+use Flarum\Http\GenerateRouteHandlerTrait;
+use Flarum\Http\RouteCollection;
+use Flarum\Foundation\AbstractServiceProvider;
+use Psr\Http\Message\ServerRequestInterface;
+
+class UpdateServiceProvider extends AbstractServiceProvider
+{
+    use GenerateRouteHandlerTrait;
+
+    /**
+     * {@inheritdoc}
+     */
+    public function register()
+    {
+        $this->app->singleton('flarum.update.routes', function () {
+            return $this->getRoutes();
+        });
+
+        $this->loadViewsFrom(__DIR__.'/../../views/install', 'flarum.update');
+    }
+
+    /**
+     * @return RouteCollection
+     */
+    protected function getRoutes()
+    {
+        $routes = new RouteCollection;
+
+        $toController = $this->getHandlerGenerator($this->app);
+
+        $routes->get(
+            '/',
+            'index',
+            $toController('Flarum\Update\Controller\IndexController')
+        );
+
+        $routes->post(
+            '/',
+            'update',
+            $toController('Flarum\Update\Controller\UpdateController')
+        );
+
+        return $routes;
+    }
+}