Add "clear cache" button to admin

js/src/admin/components/StatusWidget.js

@@ -8,9 +8,11 @@
  */
 
 import DashboardWidget from './DashboardWidget';
-import icon from '../../common/helpers/icon';
 import listItems from '../../common/helpers/listItems';
 import ItemList from '../../common/utils/ItemList';
+import Dropdown from '../../common/components/Dropdown';
+import Button from '../../common/components/Button';
+import LoadingModal from './LoadingModal';
 
 export default class StatusWidget extends DashboardWidget {
   className() {
@@ -26,10 +28,16 @@ export default class StatusWidget extends DashboardWidget {
   items() {
     const items = new ItemList();
 
-    items.add('help', (
+    items.add('tools', (
-      <a href="http://flarum.org/docs/troubleshooting" target="_blank">
+      <Dropdown
-        {icon('fas fa-question-circle')} {app.translator.trans('core.admin.dashboard.help_link')}
+        label={app.translator.trans('core.admin.dashboard.tools_button')}
-      </a>
+        icon="fas fa-cog"
+        buttonClassName="Button"
+        menuClassName="Dropdown-menu--right">
+        <Button onclick={this.handleClearCache.bind(this)}>
+          {app.translator.trans('core.admin.dashboard.clear_cache_button')}
+        </Button>
+      </Dropdown>
     ));
 
     items.add('version-flarum', [<strong>Flarum</strong>, <br/>, app.forum.attribute('version')]);
@@ -38,4 +46,13 @@ export default class StatusWidget extends DashboardWidget {
 
     return items;
   }
+
+  handleClearCache(e) {
+    app.modal.show(new LoadingModal());
+
+    app.request({
+      method: 'DELETE',
+      url: app.forum.attribute('apiUrl') + '/cache'
+    }).then(() => window.location.reload());
+  }
 }

less/admin/DashboardPage.less

@@ -38,7 +38,7 @@
         overflow: hidden;
         text-overflow: ellipsis;
       }
-      &.item-help {
+      &.item-tools {
         float: right;
         margin-right: 0;
       }

src/Api/Controller/ClearCacheController.php

@@ -0,0 +1,56 @@
+<?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\Api\Controller;
+
+use Flarum\Foundation\Application;
+use Flarum\Foundation\Console\CacheClearCommand;
+use Flarum\Settings\SettingsRepositoryInterface;
+use Flarum\User\AssertPermissionTrait;
+use League\Flysystem\Adapter\Local;
+use League\Flysystem\Filesystem;
+use Psr\Http\Message\ServerRequestInterface;
+use Symfony\Component\Console\Input\ArrayInput;
+use Symfony\Component\Console\Output\NullOutput;
+use Zend\Diactoros\Response\EmptyResponse;
+
+class ClearCacheController extends AbstractDeleteController
+{
+    use AssertPermissionTrait;
+
+    /**
+     * @var CacheClearCommand
+     */
+    protected $command;
+
+    /**
+     * @param CacheClearCommand $command
+     */
+    public function __construct(CacheClearCommand $command)
+    {
+        $this->command = $command;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function delete(ServerRequestInterface $request)
+    {
+        $this->assertAdmin($request->getAttribute('actor'));
+
+        $this->command->run(
+            new ArrayInput([]),
+            new NullOutput()
+        );
+
+        return new EmptyResponse(204);
+    }
+}

src/Api/routes.php

@@ -301,4 +301,11 @@ return function (RouteCollection $map, RouteHandlerFactory $route) {
         'favicon.delete',
         $route->toController(Controller\DeleteFaviconController::class)
     );
+
+    // Clear the cache
+    $map->delete(
+        '/cache',
+        'cache.clear',
+        $route->toController(Controller\ClearCacheController::class)
+    );
 };