Move command classes to domain namespaces

They will probably be refactored away at a later stage (when we get
rid of the command bus). Until then, this lets us remove the
Flarum\Core namespace and actually feels quite clean.

src/User/Command/RequestPasswordResetHandler.php

@@ -0,0 +1,123 @@
+<?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\User\Command;
+
+use Flarum\Forum\UrlGenerator;
+use Flarum\Settings\SettingsRepositoryInterface;
+use Flarum\User\PasswordToken;
+use Flarum\User\UserRepository;
+use Illuminate\Contracts\Mail\Mailer;
+use Illuminate\Contracts\Validation\Factory;
+use Illuminate\Contracts\Validation\ValidationException;
+use Illuminate\Database\Eloquent\ModelNotFoundException;
+use Illuminate\Mail\Message;
+use Symfony\Component\Translation\TranslatorInterface;
+
+class RequestPasswordResetHandler
+{
+    /**
+     * @var UserRepository
+     */
+    protected $users;
+
+    /**
+     * @var SettingsRepositoryInterface
+     */
+    protected $settings;
+
+    /**
+     * @var Mailer
+     */
+    protected $mailer;
+
+    /**
+     * @var UrlGenerator
+     */
+    protected $url;
+
+    /**
+     * @var TranslatorInterface
+     */
+    protected $translator;
+
+    /**
+     * @var Factory
+     */
+    protected $validatorFactory;
+
+    /**
+     * @param \Flarum\User\UserRepository $users
+     * @param SettingsRepositoryInterface $settings
+     * @param Mailer $mailer
+     * @param UrlGenerator $url
+     * @param TranslatorInterface $translator
+     * @param Factory $validatorFactory
+     */
+    public function __construct(
+        UserRepository $users,
+        SettingsRepositoryInterface $settings,
+        Mailer $mailer,
+        UrlGenerator $url,
+        TranslatorInterface $translator,
+        Factory $validatorFactory
+    ) {
+        $this->users = $users;
+        $this->settings = $settings;
+        $this->mailer = $mailer;
+        $this->url = $url;
+        $this->translator = $translator;
+        $this->validatorFactory = $validatorFactory;
+    }
+
+    /**
+     * @param RequestPasswordReset $command
+     * @return \Flarum\User\User
+     * @throws ModelNotFoundException
+     */
+    public function handle(RequestPasswordReset $command)
+    {
+        $email = $command->email;
+
+        $validation = $this->validatorFactory->make(
+            compact('email'),
+            ['email' => 'required|email']
+        );
+
+        if ($validation->fails()) {
+            throw new ValidationException($validation);
+        }
+
+        $user = $this->users->findByEmail($email);
+
+        if (! $user) {
+            throw new ModelNotFoundException;
+        }
+
+        $token = PasswordToken::generate($user->id);
+        $token->save();
+
+        $data = [
+            '{username}' => $user->username,
+            '{url}' => $this->url->toRoute('resetPassword', ['token' => $token->id]),
+            '{forum}' => $this->settings->get('forum_title'),
+        ];
+
+        $body = $this->translator->trans('core.email.reset_password.body', $data);
+
+        $this->mailer->raw($body, function (Message $message) use ($user, $data) {
+            $message->to($user->email);
+            $message->subject('['.$data['{forum}'].'] '.$this->translator->trans('core.email.reset_password.subject'));
+        });
+
+        return $user;
+    }
+}