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/Group/Command/CreateGroup.php

@@ -0,0 +1,41 @@
+<?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\Group\Command;
+
+use Flarum\User\User;
+
+class CreateGroup
+{
+    /**
+     * The user performing the action.
+     *
+     * @var User
+     */
+    public $actor;
+
+    /**
+     * The attributes of the new group.
+     *
+     * @var array
+     */
+    public $data;
+
+    /**
+     * @param User $actor The user performing the action.
+     * @param array $data The attributes of the new group.
+     */
+    public function __construct(User $actor, array $data)
+    {
+        $this->actor = $actor;
+        $this->data = $data;
+    }
+}

src/Group/Command/CreateGroupHandler.php

@@ -0,0 +1,72 @@
+<?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\Group\Command;
+
+use Flarum\Foundation\DispatchEventsTrait;
+use Flarum\Group\Event\Saving;
+use Flarum\Group\Group;
+use Flarum\Group\GroupValidator;
+use Flarum\User\AssertPermissionTrait;
+use Illuminate\Contracts\Events\Dispatcher;
+
+class CreateGroupHandler
+{
+    use DispatchEventsTrait;
+    use AssertPermissionTrait;
+
+    /**
+     * @var \Flarum\Group\GroupValidator
+     */
+    protected $validator;
+
+    /**
+     * @param Dispatcher $events
+     * @param \Flarum\Group\GroupValidator $validator
+     */
+    public function __construct(Dispatcher $events, GroupValidator $validator)
+    {
+        $this->events = $events;
+        $this->validator = $validator;
+    }
+
+    /**
+     * @param CreateGroup $command
+     * @return \Flarum\Group\Group
+     * @throws \Flarum\User\Exception\PermissionDeniedException
+     */
+    public function handle(CreateGroup $command)
+    {
+        $actor = $command->actor;
+        $data = $command->data;
+
+        $this->assertCan($actor, 'createGroup');
+
+        $group = Group::build(
+            array_get($data, 'attributes.nameSingular'),
+            array_get($data, 'attributes.namePlural'),
+            array_get($data, 'attributes.color'),
+            array_get($data, 'attributes.icon')
+        );
+
+        $this->events->fire(
+            new Saving($group, $actor, $data)
+        );
+
+        $this->validator->assertValid($group->getAttributes());
+
+        $group->save();
+
+        $this->dispatchEventsFor($group, $actor);
+
+        return $group;
+    }
+}

src/Group/Command/DeleteGroup.php

@@ -0,0 +1,52 @@
+<?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\Group\Command;
+
+use Flarum\User\User;
+
+class DeleteGroup
+{
+    /**
+     * The ID of the group to delete.
+     *
+     * @var int
+     */
+    public $groupId;
+
+    /**
+     * The user performing the action.
+     *
+     * @var User
+     */
+    public $actor;
+
+    /**
+     * Any other group input associated with the action. This is unused by
+     * default, but may be used by extensions.
+     *
+     * @var array
+     */
+    public $data;
+
+    /**
+     * @param int $groupId The ID of the group to delete.
+     * @param User $actor The user performing the action.
+     * @param array $data Any other group input associated with the action. This
+     *     is unused by default, but may be used by extensions.
+     */
+    public function __construct($groupId, User $actor, array $data = [])
+    {
+        $this->groupId = $groupId;
+        $this->actor = $actor;
+        $this->data = $data;
+    }
+}

src/Group/Command/DeleteGroupHandler.php

@@ -0,0 +1,63 @@
+<?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\Group\Command;
+
+use Flarum\Foundation\DispatchEventsTrait;
+use Flarum\Group\Event\Deleting;
+use Flarum\Group\GroupRepository;
+use Flarum\User\AssertPermissionTrait;
+use Flarum\User\Exception\PermissionDeniedException;
+use Illuminate\Contracts\Events\Dispatcher;
+
+class DeleteGroupHandler
+{
+    use DispatchEventsTrait;
+    use AssertPermissionTrait;
+
+    /**
+     * @var GroupRepository
+     */
+    protected $groups;
+
+    /**
+     * @param GroupRepository $groups
+     */
+    public function __construct(Dispatcher $events, GroupRepository $groups)
+    {
+        $this->groups = $groups;
+        $this->events = $events;
+    }
+
+    /**
+     * @param DeleteGroup $command
+     * @return \Flarum\Group\Group
+     * @throws PermissionDeniedException
+     */
+    public function handle(DeleteGroup $command)
+    {
+        $actor = $command->actor;
+
+        $group = $this->groups->findOrFail($command->groupId, $actor);
+
+        $this->assertCan($actor, 'delete', $group);
+
+        $this->events->fire(
+            new Deleting($group, $actor, $command->data)
+        );
+
+        $group->delete();
+
+        $this->dispatchEventsFor($group, $actor);
+
+        return $group;
+    }
+}

src/Group/Command/EditGroup.php

@@ -0,0 +1,50 @@
+<?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\Group\Command;
+
+use Flarum\User\User;
+
+class EditGroup
+{
+    /**
+     * The ID of the group to edit.
+     *
+     * @var int
+     */
+    public $groupId;
+
+    /**
+     * The user performing the action.
+     *
+     * @var User
+     */
+    public $actor;
+
+    /**
+     * The attributes to update on the post.
+     *
+     * @var array
+     */
+    public $data;
+
+    /**
+     * @param int $groupId The ID of the group to edit.
+     * @param User $actor The user performing the action.
+     * @param array $data The attributes to update on the post.
+     */
+    public function __construct($groupId, User $actor, array $data)
+    {
+        $this->groupId = $groupId;
+        $this->actor = $actor;
+        $this->data = $data;
+    }
+}

src/Group/Command/EditGroupHandler.php

@@ -0,0 +1,90 @@
+<?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\Group\Command;
+
+use Flarum\Foundation\DispatchEventsTrait;
+use Flarum\Group\Event\Saving;
+use Flarum\Group\Group;
+use Flarum\Group\GroupRepository;
+use Flarum\Group\GroupValidator;
+use Flarum\User\AssertPermissionTrait;
+use Flarum\User\Exception\PermissionDeniedException;
+use Illuminate\Contracts\Events\Dispatcher;
+
+class EditGroupHandler
+{
+    use DispatchEventsTrait;
+    use AssertPermissionTrait;
+
+    /**
+     * @var \Flarum\Group\GroupRepository
+     */
+    protected $groups;
+
+    /**
+     * @var GroupValidator
+     */
+    protected $validator;
+
+    /**
+     * @param Dispatcher $events
+     * @param GroupRepository $groups
+     * @param GroupValidator $validator
+     */
+    public function __construct(Dispatcher $events, GroupRepository $groups, GroupValidator $validator)
+    {
+        $this->events = $events;
+        $this->groups = $groups;
+        $this->validator = $validator;
+    }
+
+    /**
+     * @param EditGroup $command
+     * @return Group
+     * @throws PermissionDeniedException
+     */
+    public function handle(EditGroup $command)
+    {
+        $actor = $command->actor;
+        $data = $command->data;
+
+        $group = $this->groups->findOrFail($command->groupId, $actor);
+
+        $this->assertCan($actor, 'edit', $group);
+
+        $attributes = array_get($data, 'attributes', []);
+
+        if (isset($attributes['nameSingular']) && isset($attributes['namePlural'])) {
+            $group->rename($attributes['nameSingular'], $attributes['namePlural']);
+        }
+
+        if (isset($attributes['color'])) {
+            $group->color = $attributes['color'];
+        }
+
+        if (isset($attributes['icon'])) {
+            $group->icon = $attributes['icon'];
+        }
+
+        $this->events->fire(
+            new Saving($group, $actor, $data)
+        );
+
+        $this->validator->assertValid($group->getDirty());
+
+        $group->save();
+
+        $this->dispatchEventsFor($group, $actor);
+
+        return $group;
+    }
+}