Replace glob by EventDispatcher

Signed-off-by: Vitor Mattos <vitor@php.rio>

docs/implement-import.md

@@ -1,4 +1,32 @@
 ## Implement import
 
-* Create a new class `lib/Service/Importer/Systems/<ImportName>Service.php` where `<ImportName>` is the name of the source system.
+* Create a new importer class extending `ABoardImportService`
+* Create a listener for event `BoardImportGetAllowedEvent` to enable your importer.
+  > You can read more about listeners on [Nextcloud](https://docs.nextcloud.com/server/latest/developer_manual/basics/events.html?highlight=event#writing-a-listener) doc.
+
+  Example:
+
+```php
+class YourCustomImporterListener {
+    public function handle(Event $event): void {
+        if (!($event instanceof BoardImportGetAllowedEvent)) {
+            return;
+        }
+
+        $event->getService()->addAllowedImportSystem([
+            'name' => YourCustomImporterService::$name,
+            'class' => YourCustomImporterService::class,
+            'internalName' => 'YourCustomImporter'
+        ]);
+    }
+}
+```
+  * Register your listener on your `Application` class like this:
+```php
+$dispatcher = $this->getContainer()->query(IEventDispatcher::class);
+$dispatcher->registerEventListener(
+    BoardImportGetAllowedEvent::class,
+    YourCustomImporterListener::class
+);
+```
 * Use the `lib/Service/Importer/Systems/TrelloJsonService.php` class as inspiration

lib/Event/ABoardImportGetAllowedEvent.php

@@ -0,0 +1,44 @@
+<?php
+/*
+ * @copyright Copyright (c) 2021 Vitor Mattos <vitor@php.rio>
+ *
+ * @author Vitor Mattos <vitor@php.rio>
+ *
+ * @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/>.
+ *
+ */
+
+declare(strict_types=1);
+
+
+namespace OCA\Deck\Event;
+
+use OCA\Deck\Service\Importer\BoardImportService;
+use OCP\EventDispatcher\Event;
+
+abstract class ABoardImportGetAllowedEvent extends Event {
+	private $service;
+
+	public function __construct(BoardImportService $service) {
+		parent::__construct();
+
+		$this->service = $service;
+	}
+
+	public function getService(): BoardImportService {
+		return $this->service;
+	}
+}

lib/Event/BoardImportGetAllowedEvent.php

@@ -0,0 +1,29 @@
+<?php
+/*
+ * @copyright Copyright (c) 2021 Vitor Mattos <vitor@php.rio>
+ *
+ * @author Vitor Mattos <vitor@php.rio>
+ *
+ * @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/>.
+ *
+ */
+
+declare(strict_types=1);
+
+namespace OCA\Deck\Event;
+
+class BoardImportGetAllowedEvent extends ABoardImportGetAllowedEvent {
+}

lib/Service/Importer/ABoardImportService.php

@@ -92,6 +92,8 @@ abstract public function getLabels(): array;
 
 	abstract public function validateUsers(): void;
 
+	abstract public function getJsonSchemaPath(): string;
+
 	public function updateStack(string $id, Stack $stack): void {
 		$this->stacks[$id] = $stack;
 	}

lib/Service/Importer/BoardImportCommandService.php

@@ -114,8 +114,7 @@ protected function validateConfig(): void {
 				return $v['message'];
 			}, $e->getData()));
 			$this->getOutput()->writeln('Valid schema:');
-			$schemaPath = __DIR__ . '/fixtures/config-' . $this->getSystem() . '-schema.json';
-			$this->getOutput()->writeln(print_r(file_get_contents($schemaPath), true));
+			$this->getOutput()->writeln(print_r(file_get_contents($this->getJsonSchemaPath()), true));
 			$this->getInput()->setOption('config', '');
 		}
 		$this->validateConfig();

lib/Service/Importer/BoardImportService.php

@@ -36,11 +36,16 @@
 use OCA\Deck\Db\CardMapper;
 use OCA\Deck\Db\LabelMapper;
 use OCA\Deck\Db\StackMapper;
+use OCA\Deck\Event\BoardImportGetAllowedEvent;
 use OCA\Deck\Exceptions\ConflictException;
 use OCA\Deck\NotFoundException;
+use OCA\Deck\Service\FileService;
+use OCA\Deck\Service\Importer\Systems\TrelloApiService;
+use OCA\Deck\Service\Importer\Systems\TrelloJsonService;
 use OCP\Comments\IComment;
 use OCP\Comments\ICommentsManager;
 use OCP\Comments\NotFoundException as CommentNotFoundException;
+use OCP\EventDispatcher\IEventDispatcher;
 use OCP\IUserManager;
 
 class BoardImportService {
@@ -62,6 +67,8 @@ class BoardImportService {
 	private $attachmentMapper;
 	/** @var ICommentsManager */
 	private $commentsManager;
+	/** @var IEventDispatcher */
+	private $eventDispatcher;
 	/** @var string */
 	private $system = '';
 	/** @var null|ABoardImportService */
@@ -96,7 +103,8 @@ public function __construct(
 		AssignmentMapper $assignmentMapper,
 		AttachmentMapper $attachmentMapper,
 		CardMapper $cardMapper,
-		ICommentsManager $commentsManager
+		ICommentsManager $commentsManager,
+		IEventDispatcher $eventDispatcher
 	) {
 		$this->userManager = $userManager;
 		$this->boardMapper = $boardMapper;
@@ -107,6 +115,7 @@ public function __construct(
 		$this->assignmentMapper = $assignmentMapper;
 		$this->attachmentMapper = $attachmentMapper;
 		$this->commentsManager = $commentsManager;
+		$this->eventDispatcher = $eventDispatcher;
 		$this->board = new Board();
 		$this->disableCommentsEvents();
 	}
@@ -161,29 +170,25 @@ public function getSystem(): string {
 		return $this->system;
 	}
 
+	public function addAllowedImportSystem($system): self {
+		$this->allowedSystems[] = $system;
+		return $this;
+	}
+
 	public function getAllowedImportSystems(): array {
 		if (!$this->allowedSystems) {
-			$allowedSystems = glob(__DIR__ . '/Systems/*Service.php');
-			$allowedSystems = array_map(function ($filename) {
-				preg_match('/\/(?<class>(?<system>\w+)Service)\.php$/', $filename, $matches);
-				$className = 'OCA\Deck\Service\Importer\Systems\\'.$matches['class'];
-				if (!class_exists($className)) {
-					/** @psalm-suppress UnresolvableInclude */
-					require_once $className;
-				}
-				/** @psalm-suppress InvalidPropertyFetch */
-				$name = $className::$name;
-				if (empty($name)) {
-					$name = lcfirst($matches['system']);
-				}
-				return [
-					'name' => $name,
-					'class' => $className,
-					'internalName' => lcfirst($matches['system'])
-				];
-			}, $allowedSystems);
-			$this->allowedSystems = array_values($allowedSystems);
+			$this->addAllowedImportSystem([
+				'name' => TrelloApiService::$name,
+				'class' => TrelloApiService::class,
+				'internalName' => 'TrelloApi'
+			]);
+			$this->addAllowedImportSystem([
+				'name' => TrelloJsonService::$name,
+				'class' => TrelloJsonService::class,
+				'internalName' => 'TrelloJson'
+			]);
 		}
+		$this->eventDispatcher->dispatchTyped(new BoardImportGetAllowedEvent($this));
 		return $this->allowedSystems;
 	}
 
@@ -192,7 +197,7 @@ public function getImportSystem(): ABoardImportService {
 			throw new NotFoundException('System to import not found');
 		}
 		if (!is_object($this->systemInstance)) {
-			$systemClass = 'OCA\\Deck\\Service\\BoardImport' . ucfirst($this->getSystem()) . 'Service';
+			$systemClass = 'OCA\\Deck\\Service\\Importer\\Systems\\' . ucfirst($this->getSystem()) . 'Service';
 			$this->systemInstance = \OC::$server->get($systemClass);
 			$this->systemInstance->setImportService($this);
 		}
@@ -421,7 +426,7 @@ protected function validateConfig(): void {
 	}
 
 	public function getJsonSchemaPath(): string {
-		return __DIR__ . '/fixtures/config-' . $this->getSystem() . '-schema.json';
+		return $this->getImportSystem()->getJsonSchemaPath();
 	}
 
 	public function validateOwner(): void {

lib/Service/Importer/Systems/TrelloApiService.php

@@ -66,6 +66,15 @@ public function bootstrap(): void {
 		parent::bootstrap();
 	}
 
+	public function getJsonSchemaPath(): string {
+		return implode(DIRECTORY_SEPARATOR, [
+			__DIR__,
+			'..',
+			'fixtures',
+			'config-trelloApi-schema.json',
+		]);
+	}
+
 	private function populateActions(): void {
 		$data = $this->getImportService()->getData();
 		$data->actions = $this->doRequest(

lib/Service/Importer/Systems/TrelloJsonService.php

@@ -65,6 +65,15 @@ public function bootstrap(): void {
 		$this->validateUsers();
 	}
 
+	public function getJsonSchemaPath(): string {
+		return implode(DIRECTORY_SEPARATOR, [
+			__DIR__,
+			'..',
+			'fixtures',
+			'config-trelloJson-schema.json',
+		]);
+	}
+
 	public function validateUsers(): void {
 		if (empty($this->getImportService()->getConfig('uidRelation'))) {
 			return;

tests/unit/Service/Importer/BoardImportServiceTest.php

@@ -35,8 +35,10 @@
 use OCA\Deck\Db\LabelMapper;
 use OCA\Deck\Db\Stack;
 use OCA\Deck\Db\StackMapper;
+use OCA\Deck\Event\BoardImportGetAllowedEvent;
 use OCA\Deck\Service\Importer\Systems\TrelloJsonService;
 use OCP\Comments\ICommentsManager;
+use OCP\EventDispatcher\IEventDispatcher;
 use OCP\IDBConnection;
 use OCP\IUser;
 use OCP\IUserManager;
@@ -63,6 +65,8 @@ class BoardImportServiceTest extends \Test\TestCase {
 	private $attachmentMapper;
 	/** @var ICommentsManager|MockObject */
 	private $commentsManager;
+	/** @var IEventDispatcher|MockObject */
+	private $eventDispatcher;
 	/** @var TrelloJsonService|MockObject */
 	private $trelloJsonService;
 	/** @var BoardImportService|MockObject */
@@ -77,6 +81,7 @@ public function setUp(): void {
 		$this->assignmentMapper = $this->createMock(AssignmentMapper::class);
 		$this->attachmentMapper = $this->createMock(AttachmentMapper::class);
 		$this->commentsManager = $this->createMock(ICommentsManager::class);
+		$this->eventDispatcher = $this->createMock(IEventDispatcher::class);
 		$this->boardImportService = new BoardImportService(
 			$this->userManager,
 			$this->boardMapper,
@@ -86,18 +91,33 @@ public function setUp(): void {
 			$this->assignmentMapper,
 			$this->attachmentMapper,
 			$this->cardMapper,
-			$this->commentsManager
+			$this->commentsManager,
+			$this->eventDispatcher
 		);
 
 		$this->boardImportService->setSystem('trelloJson');
 
+		$this->eventDispatcher
+			->method('dispatchTyped')
+			->willReturnCallback(function (BoardImportGetAllowedEvent $event) {
+				$event->getService()->addAllowedImportSystem([
+					'name' => TrelloJsonService::$name,
+					'class' => TrelloJsonService::class,
+					'internalName' => 'trelloJson'
+				]);
+			});
+
 		$data = json_decode(file_get_contents(__DIR__ . '/../../../data/data-trelloJson.json'));
 		$this->boardImportService->setData($data);
 
-		$configInstance = json_decode(file_get_contents(__DIR__ . '/../../../data/config-trelloJson.json'));
+		$configFile = __DIR__ . '/../../../data/config-trelloJson.json';
+		$configInstance = json_decode(file_get_contents($configFile));
 		$this->boardImportService->setConfigInstance($configInstance);
 
 		$this->trelloJsonService = $this->createMock(TrelloJsonService::class);
+		$this->trelloJsonService
+			->method('getJsonSchemaPath')
+			->willReturn($configFile);
 		$this->boardImportService->setImportSystem($this->trelloJsonService);
 
 		$owner = $this->createMock(IUser::class);