Add new LoadAdditionalScriptsEvent

This adds a new event that is in the new style of event dispatching.
This should allow more lazy loading and better sepeartion of concerns

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

7 files changed, 117 insertions, 10 deletions

diff --git a/apps/files/composer/composer/autoload_classmap.php b/apps/files/composer/composer/autoload_classmap.php
index dd0bea25644..3aa59c88b74 100644
--- a/apps/files/composer/composer/autoload_classmap.php
+++ b/apps/files/composer/composer/autoload_classmap.php
@@ -32,6 +32,8 @@ return array(
     'OCA\\Files\\Controller\\AjaxController' => $baseDir . '/../lib/Controller/AjaxController.php',
     'OCA\\Files\\Controller\\ApiController' => $baseDir . '/../lib/Controller/ApiController.php',
     'OCA\\Files\\Controller\\ViewController' => $baseDir . '/../lib/Controller/ViewController.php',
+    'OCA\\Files\\Event\\LoadAdditionalScriptsEvent' => $baseDir . '/../lib/Event/LoadAdditionalScriptsEvent.php',
     'OCA\\Files\\Helper' => $baseDir . '/../lib/Helper.php',
+    'OCA\\Files\\Listener\\LegacyLoadAdditionalScriptsAdapter' => $baseDir . '/../lib/Listener/LegacyLoadAdditionalScriptsAdapter.php',
     'OCA\\Files\\Service\\TagService' => $baseDir . '/../lib/Service/TagService.php',
 );
diff --git a/apps/files/composer/composer/autoload_static.php b/apps/files/composer/composer/autoload_static.php
index ae748b5d4d8..07df2f173f8 100644
--- a/apps/files/composer/composer/autoload_static.php
+++ b/apps/files/composer/composer/autoload_static.php
@@ -47,7 +47,9 @@ class ComposerStaticInitFiles
         'OCA\\Files\\Controller\\AjaxController' => __DIR__ . '/..' . '/../lib/Controller/AjaxController.php',
         'OCA\\Files\\Controller\\ApiController' => __DIR__ . '/..' . '/../lib/Controller/ApiController.php',
         'OCA\\Files\\Controller\\ViewController' => __DIR__ . '/..' . '/../lib/Controller/ViewController.php',
+        'OCA\\Files\\Event\\LoadAdditionalScriptsEvent' => __DIR__ . '/..' . '/../lib/Event/LoadAdditionalScriptsEvent.php',
         'OCA\\Files\\Helper' => __DIR__ . '/..' . '/../lib/Helper.php',
+        'OCA\\Files\\Listener\\LegacyLoadAdditionalScriptsAdapter' => __DIR__ . '/..' . '/../lib/Listener/LegacyLoadAdditionalScriptsAdapter.php',
         'OCA\\Files\\Service\\TagService' => __DIR__ . '/..' . '/../lib/Service/TagService.php',
     );
 
diff --git a/apps/files/lib/AppInfo/Application.php b/apps/files/lib/AppInfo/Application.php
index cef4b31f85f..6f06faa3cae 100644
--- a/apps/files/lib/AppInfo/Application.php
+++ b/apps/files/lib/AppInfo/Application.php
@@ -30,9 +30,12 @@ use OCA\Files\Activity\Helper;
 use OCA\Files\Collaboration\Resources\Listener;
 use OCA\Files\Collaboration\Resources\ResourceProvider;
 use OCA\Files\Controller\ApiController;
+use OCA\Files\Event\LoadAdditionalScriptsEvent;
+use OCA\Files\Listener\LegacyLoadAdditionalScriptsAdapter;
 use OCP\AppFramework\App;
 use \OCA\Files\Service\TagService;
 use OCP\Collaboration\Resources\IManager;
+use OCP\EventDispatcher\IEventDispatcher;
 use \OCP\IContainer;
 use OCA\Files\Controller\ViewController;
 use OCA\Files\Capabilities;
@@ -85,5 +88,9 @@ class Application extends App {
 		$resourceManager = $container->query(IManager::class);
 		$resourceManager->registerResourceProvider(ResourceProvider::class);
 		Listener::register($server->getEventDispatcher());
+
+		/** @var IEventDispatcher $dispatcher */
+		$dispatcher = $container->query(IEventDispatcher::class);
+		$dispatcher->addServiceListener(LoadAdditionalScriptsEvent::class, LegacyLoadAdditionalScriptsAdapter::class);
 	}
 }
diff --git a/apps/files/lib/Controller/ViewController.php b/apps/files/lib/Controller/ViewController.php
index 509f927a295..518bbc1bf08 100644
--- a/apps/files/lib/Controller/ViewController.php
+++ b/apps/files/lib/Controller/ViewController.php
@@ -29,13 +29,14 @@
 namespace OCA\Files\Controller;
 
 use OCA\Files\Activity\Helper;
+use OCA\Files\Event\LoadAdditionalScriptsEvent;
 use OCP\AppFramework\Controller;
 use OCP\AppFramework\Http\ContentSecurityPolicy;
-use OCP\AppFramework\Http\NotFoundResponse;
 use OCP\AppFramework\Http\RedirectResponse;
 use OCP\AppFramework\Http\Response;
 use OCP\AppFramework\Http\TemplateResponse;
 use OCP\App\IAppManager;
+use OCP\EventDispatcher\IEventDispatcher;
 use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
 use OCP\Files\NotFoundException;
@@ -44,8 +45,6 @@ use OCP\IL10N;
 use OCP\IRequest;
 use OCP\IURLGenerator;
 use OCP\IUserSession;
-use Symfony\Component\EventDispatcher\EventDispatcherInterface;
-use Symfony\Component\EventDispatcher\GenericEvent;
 
 /**
  * Class ViewController
@@ -63,7 +62,7 @@ class ViewController extends Controller {
 	protected $l10n;
 	/** @var IConfig */
 	protected $config;
-	/** @var EventDispatcherInterface */
+	/** @var IEventDispatcher */
 	protected $eventDispatcher;
 	/** @var IUserSession */
 	protected $userSession;
@@ -79,7 +78,7 @@ class ViewController extends Controller {
 		IURLGenerator $urlGenerator,
 		IL10N $l10n,
 		IConfig $config,
-		EventDispatcherInterface $eventDispatcherInterface,
+		IEventDispatcher $eventDispatcher,
 		IUserSession $userSession,
 		IAppManager $appManager,
 		IRootFolder $rootFolder,
@@ -91,7 +90,7 @@ class ViewController extends Controller {
 		$this->urlGenerator    = $urlGenerator;
 		$this->l10n            = $l10n;
 		$this->config          = $config;
-		$this->eventDispatcher = $eventDispatcherInterface;
+		$this->eventDispatcher = $eventDispatcher;
 		$this->userSession     = $userSession;
 		$this->appManager      = $appManager;
 		$this->rootFolder      = $rootFolder;
@@ -267,8 +266,8 @@ class ViewController extends Controller {
 			];
 		}
 
-		$event = new GenericEvent(null, ['hiddenFields' => []]);
-		$this->eventDispatcher->dispatch('OCA\Files::loadAdditionalScripts', $event);
+		$event = new LoadAdditionalScriptsEvent();
+		$this->eventDispatcher->dispatch(LoadAdditionalScriptsEvent::class, $event);
 
 		$params                                = [];
 		$params['usedSpacePercent']            = (int) $storageInfo['relative'];
@@ -285,7 +284,7 @@ class ViewController extends Controller {
 		$params['fileNotFound']                = $fileNotFound ? 1 : 0;
 		$params['appNavigation']               = $nav;
 		$params['appContents']                 = $contentItems;
-		$params['hiddenFields']                = $event->getArgument('hiddenFields');
+		$params['hiddenFields']                = $event->getHiddenFields();
 
 		$response = new TemplateResponse(
 			$this->appName,
diff --git a/apps/files/lib/Event/LoadAdditionalScriptsEvent.php b/apps/files/lib/Event/LoadAdditionalScriptsEvent.php
new file mode 100644
index 00000000000..bd3d1a8f4e3
--- /dev/null
+++ b/apps/files/lib/Event/LoadAdditionalScriptsEvent.php
@@ -0,0 +1,40 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\Files\Event;
+
+use OCP\EventDispatcher\Event;
+
+class LoadAdditionalScriptsEvent extends Event {
+
+	private $hiddenFields = [];
+
+	public function addHiddenField(string $name, string $value): void {
+		$this->hiddenFields[$name] = $value;
+	}
+
+	public function getHiddenFields(): array {
+		return $this->hiddenFields;
+	}
+}
diff --git a/apps/files/lib/Listener/LegacyLoadAdditionalScriptsAdapter.php b/apps/files/lib/Listener/LegacyLoadAdditionalScriptsAdapter.php
new file mode 100644
index 00000000000..ba89d591227
--- /dev/null
+++ b/apps/files/lib/Listener/LegacyLoadAdditionalScriptsAdapter.php
@@ -0,0 +1,56 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\Files\Listener;
+
+use OC\EventDispatcher\SymfonyAdapter;
+use OCA\Files\Event\LoadAdditionalScriptsEvent;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventListener;
+use Symfony\Component\EventDispatcher\GenericEvent;
+
+class LegacyLoadAdditionalScriptsAdapter implements IEventListener {
+
+	/** @var SymfonyAdapter */
+	private $dispatcher;
+
+	public function __construct(SymfonyAdapter $dispatcher) {
+		$this->dispatcher = $dispatcher;
+	}
+
+	public function handle(Event $event): void {
+		if (!($event instanceof LoadAdditionalScriptsEvent)) {
+			return;
+		}
+
+		$legacyEvent = new GenericEvent(null, ['hiddenFields' => []]);
+		$this->dispatcher->dispatch('OCA\Files::loadAdditionalScripts', $legacyEvent);
+
+		$hiddenFields = $legacyEvent->getArgument('hiddenFields');
+		foreach ($hiddenFields as $name => $value) {
+			$event->addHiddenField($name, $value);
+		}
+	}
+
+}
diff --git a/apps/files/tests/Controller/ViewControllerTest.php b/apps/files/tests/Controller/ViewControllerTest.php
index d051ab7258d..eb4e4f6ca2c 100644
--- a/apps/files/tests/Controller/ViewControllerTest.php
+++ b/apps/files/tests/Controller/ViewControllerTest.php
@@ -32,6 +32,7 @@ namespace OCA\Files\Tests\Controller;
 use OCA\Files\Activity\Helper;
 use OCA\Files\Controller\ViewController;
 use OCP\AppFramework\Http;
+use OCP\EventDispatcher\IEventDispatcher;
 use OCP\Files\File;
 use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
@@ -81,7 +82,7 @@ class ViewControllerTest extends TestCase {
 		$this->urlGenerator = $this->getMockBuilder(IURLGenerator::class)->getMock();
 		$this->l10n = $this->getMockBuilder(IL10N::class)->getMock();
 		$this->config = $this->getMockBuilder(IConfig::class)->getMock();
-		$this->eventDispatcher = $this->getMockBuilder('\Symfony\Component\EventDispatcher\EventDispatcherInterface')->getMock();
+		$this->eventDispatcher = $this->createMock(IEventDispatcher::class);
 		$this->userSession = $this->getMockBuilder(IUserSession::class)->getMock();
 		$this->appManager = $this->getMockBuilder('\OCP\App\IAppManager')->getMock();
 		$this->user = $this->getMockBuilder(IUser::class)->getMock();