Finish admin permissions page and clean up everything

framework/core/src/Admin/Actions/UpdateConfigAction.php

@@ -0,0 +1,42 @@
+<?php namespace Flarum\Admin\Actions;
+
+use Psr\Http\Message\ServerRequestInterface as Request;
+use Flarum\Core\Settings\SettingsRepository;
+use Flarum\Support\Action;
+use Flarum\Core\Groups\Permission;
+use Exception;
+
+class UpdateConfigAction extends Action
+{
+    /**
+     * @var SettingsRepository
+     */
+    protected $settings;
+
+    /**
+     * @param SettingsRepository $settings
+     */
+    public function __construct(SettingsRepository $settings)
+    {
+        $this->settings = $settings;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function handle(Request $request, array $routeParams = [])
+    {
+        $config = array_get($request->getAttributes(), 'config', []);
+
+        // TODO: throw HTTP status 400 or 422
+        if (! is_array($config)) {
+            throw new Exception;
+        }
+
+        foreach ($config as $k => $v) {
+            $this->settings->set($k, $v);
+        }
+
+        return $this->success();
+    }
+}

framework/core/src/Admin/Actions/UpdatePermissionAction.php

@@ -0,0 +1,29 @@
+<?php namespace Flarum\Admin\Actions;
+
+use Psr\Http\Message\ServerRequestInterface as Request;
+use Flarum\Support\Action;
+use Flarum\Core\Groups\Permission;
+
+class UpdatePermissionAction extends Action
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function handle(Request $request, array $routeParams = [])
+    {
+        $input = $request->getAttributes();
+        $permission = array_get($input, 'permission');
+        $groupIds = array_get($input, 'groupIds');
+
+        Permission::where('permission', $permission)->delete();
+
+        Permission::insert(array_map(function ($groupId) use ($permission) {
+            return [
+                'permission' => $permission,
+                'group_id' => $groupId
+            ];
+        }, $groupIds));
+
+        return $this->success();
+    }
+}

framework/core/src/Admin/AdminServiceProvider.php

@@ -50,6 +50,18 @@ class AdminServiceProvider extends ServiceProvider
             'flarum.admin.index',
             $this->action('Flarum\Admin\Actions\ClientAction')
         );
+
+        $routes->post(
+            '/config',
+            'flarum.admin.updateConfig',
+            $this->action('Flarum\Admin\Actions\UpdateConfigAction')
+        );
+
+        $routes->post(
+            '/permission',
+            'flarum.admin.updatePermission',
+            $this->action('Flarum\Admin\Actions\UpdatePermissionAction')
+        );
     }
 
     protected function action($class)

framework/core/src/Api/Serializers/ForumSerializer.php

@@ -32,6 +32,7 @@ class ForumSerializer extends Serializer
         ];
 
         if ($this->actor->isAdmin()) {
+            $attributes['adminUrl'] = Core::config('admin_url');
         }
 
         return $attributes;

framework/core/src/Core/Settings/DatabaseSettingsRepository.php

@@ -29,6 +29,10 @@ class DatabaseSettingsRepository implements SettingsRepository
 
     public function set($key, $value)
     {
-        $this->database->table('config')->where('key', $key)->update(['value' => $value]);
+        $query = $this->database->table('config')->where('key', $key);
+
+        $method = $query->exists() ? 'update' : 'insert';
+
+        $query->$method(compact('key', 'value'));
     }
 }