Merge pull request #21821 from nextcloud/enh/bootstrap/initial_state

Bootstrap: add initial state registration

7 files changed, 142 insertions, 1 deletions

diff --git a/lib/composer/composer/autoload_classmap.php b/lib/composer/composer/autoload_classmap.php
index f28e7977a03..a5fa60fc55c 100644
--- a/lib/composer/composer/autoload_classmap.php
+++ b/lib/composer/composer/autoload_classmap.php
@@ -77,6 +77,7 @@ return array(
     'OCP\\AppFramework\\QueryException' => $baseDir . '/lib/public/AppFramework/QueryException.php',
     'OCP\\AppFramework\\Services\\IAppConfig' => $baseDir . '/lib/public/AppFramework/Services/IAppConfig.php',
     'OCP\\AppFramework\\Services\\IInitialState' => $baseDir . '/lib/public/AppFramework/Services/IInitialState.php',
+    'OCP\\AppFramework\\Services\\InitialStateProvider' => $baseDir . '/lib/public/AppFramework/Services/InitialStateProvider.php',
     'OCP\\AppFramework\\Utility\\IControllerMethodReflector' => $baseDir . '/lib/public/AppFramework/Utility/IControllerMethodReflector.php',
     'OCP\\AppFramework\\Utility\\ITimeFactory' => $baseDir . '/lib/public/AppFramework/Utility/ITimeFactory.php',
     'OCP\\App\\AppPathNotFoundException' => $baseDir . '/lib/public/App/AppPathNotFoundException.php',
diff --git a/lib/composer/composer/autoload_static.php b/lib/composer/composer/autoload_static.php
index e584c63c644..4ffb9a7c2ad 100644
--- a/lib/composer/composer/autoload_static.php
+++ b/lib/composer/composer/autoload_static.php
@@ -106,6 +106,7 @@ class ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c
         'OCP\\AppFramework\\QueryException' => __DIR__ . '/../../..' . '/lib/public/AppFramework/QueryException.php',
         'OCP\\AppFramework\\Services\\IAppConfig' => __DIR__ . '/../../..' . '/lib/public/AppFramework/Services/IAppConfig.php',
         'OCP\\AppFramework\\Services\\IInitialState' => __DIR__ . '/../../..' . '/lib/public/AppFramework/Services/IInitialState.php',
+        'OCP\\AppFramework\\Services\\InitialStateProvider' => __DIR__ . '/../../..' . '/lib/public/AppFramework/Services/InitialStateProvider.php',
         'OCP\\AppFramework\\Utility\\IControllerMethodReflector' => __DIR__ . '/../../..' . '/lib/public/AppFramework/Utility/IControllerMethodReflector.php',
         'OCP\\AppFramework\\Utility\\ITimeFactory' => __DIR__ . '/../../..' . '/lib/public/AppFramework/Utility/ITimeFactory.php',
         'OCP\\App\\AppPathNotFoundException' => __DIR__ . '/../../..' . '/lib/public/App/AppPathNotFoundException.php',
diff --git a/lib/private/AppFramework/Bootstrap/RegistrationContext.php b/lib/private/AppFramework/Bootstrap/RegistrationContext.php
index 1ed2dac4c45..0f408380e88 100644
--- a/lib/private/AppFramework/Bootstrap/RegistrationContext.php
+++ b/lib/private/AppFramework/Bootstrap/RegistrationContext.php
@@ -69,6 +69,9 @@ class RegistrationContext {
 	/** @var array[] */
 	private $alternativeLogins = [];
 
+	/** @var array[] */
+	private $initialStates = [];
+
 	/** @var ILogger */
 	private $logger;
 
@@ -164,6 +167,13 @@ class RegistrationContext {
 					$class
 				);
 			}
+
+			public function registerInitialStateProvider(string $class): void {
+				$this->context->registerInitialState(
+					$this->appId,
+					$class
+				);
+			}
 		};
 	}
 
@@ -243,6 +253,13 @@ class RegistrationContext {
 		];
 	}
 
+	public function registerInitialState(string $appId, string $class): void {
+		$this->initialStates[] = [
+			'appId' => $appId,
+			'class' => $class,
+		];
+	}
+
 	/**
 	 * @param App[] $apps
 	 */
@@ -413,4 +430,11 @@ class RegistrationContext {
 	public function getAlternativeLogins(): array {
 		return $this->alternativeLogins;
 	}
+
+	/**
+	 * @erturn array[]
+	 */
+	public function getInitialStates(): array {
+		return $this->initialStates;
+	}
 }
diff --git a/lib/private/InitialStateService.php b/lib/private/InitialStateService.php
index c74eb683bd9..76e64d8b013 100644
--- a/lib/private/InitialStateService.php
+++ b/lib/private/InitialStateService.php
@@ -28,8 +28,12 @@ declare(strict_types=1);
 namespace OC;
 
 use Closure;
+use OC\AppFramework\Bootstrap\Coordinator;
+use OCP\AppFramework\QueryException;
+use OCP\AppFramework\Services\InitialStateProvider;
 use OCP\IInitialStateService;
 use OCP\ILogger;
+use OCP\IServerContainer;
 
 class InitialStateService implements IInitialStateService {
 
@@ -42,8 +46,16 @@ class InitialStateService implements IInitialStateService {
 	/** @var Closure[][] */
 	private $lazyStates = [];
 
-	public function __construct(ILogger $logger) {
+	/** @var Coordinator */
+	private $bootstrapCoordinator;
+
+	/** @var IServerContainer */
+	private $container;
+
+	public function __construct(ILogger $logger, Coordinator $bootstrapCoordinator, IServerContainer $container) {
 		$this->logger = $logger;
+		$this->bootstrapCoordinator = $bootstrapCoordinator;
+		$this->container = $container;
 	}
 
 	public function provideInitialState(string $appName, string $key, $data): void {
@@ -88,8 +100,45 @@ class InitialStateService implements IInitialStateService {
 		$this->lazyStates = [];
 	}
 
+	/**
+	 * Load the lazy states via the IBootstrap mechanism
+	 */
+	private function loadLazyStates(): void {
+		$context = $this->bootstrapCoordinator->getRegistrationContext();
+
+		if ($context === null) {
+			// To early, nothing to do yet
+			return;
+		}
+
+		$initialStates = $context->getInitialStates();
+		foreach ($initialStates as $initialState) {
+			try {
+				$provider = $this->container->query($initialState['class']);
+			} catch (QueryException $e) {
+				// Log an continue. We can be fault tolerant here.
+				$this->logger->logException($e, [
+					'message' => 'Could not load initial state provider dynamically: ' . $e->getMessage(),
+					'level' => ILogger::ERROR,
+					'app' => $initialState['appId'],
+				]);
+				continue;
+			}
+
+			if (!($provider instanceof InitialStateProvider)) {
+				// Log an continue. We can be fault tolerant here.
+				$this->logger->error('Initial state provider is not an InitialStateProvider instance: ' . $initialState['class'], [
+					'app' => $initialState['appId'],
+				]);
+			}
+
+			$this->provideInitialState($initialState['appId'], $provider->getKey(), $provider);
+		}
+	}
+
 	public function getInitialStates(): array {
 		$this->invokeLazyStateCallbacks();
+		$this->loadLazyStates();
 
 		$appStates = [];
 		foreach ($this->states as $app => $states) {
diff --git a/lib/public/AppFramework/Bootstrap/IRegistrationContext.php b/lib/public/AppFramework/Bootstrap/IRegistrationContext.php
index 9d910d1c693..13181cbe1cb 100644
--- a/lib/public/AppFramework/Bootstrap/IRegistrationContext.php
+++ b/lib/public/AppFramework/Bootstrap/IRegistrationContext.php
@@ -155,4 +155,17 @@ interface IRegistrationContext {
 	 * @since 20.0.0
 	 */
 	public function registerAlternativeLogin(string $class): void;
+
+	/**
+	 * Register an initialstate provider
+	 *
+	 * It is allowed to register more than one provider per app.
+	 *
+	 * @param string $class
+	 *
+	 * @return void
+	 *
+	 * @since 21.0.0
+	 */
+	public function registerInitialStateProvider(string $class): void;
 }
diff --git a/lib/public/AppFramework/Services/InitialStateProvider.php b/lib/public/AppFramework/Services/InitialStateProvider.php
new file mode 100644
index 00000000000..53357b48825
--- /dev/null
+++ b/lib/public/AppFramework/Services/InitialStateProvider.php
@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2020, 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 OCP\AppFramework\Services;
+
+/**
+ * @since 21.0.0
+ */
+abstract class InitialStateProvider implements \JsonSerializable {
+
+	/**
+	 * @since 21.0.0
+	 */
+	abstract public function getKey(): string;
+
+	/**
+	 * @since 21.0.0
+	 */
+	abstract public function getData();
+
+	/**
+	 * @since 21.0.0
+	 */
+	final public function jsonSerialize() {
+		return $this->getData();
+	}
+}
diff --git a/lib/public/IInitialStateService.php b/lib/public/IInitialStateService.php
index 905cf2a9a58..7f3e495ea22 100644
--- a/lib/public/IInitialStateService.php
+++ b/lib/public/IInitialStateService.php
@@ -43,6 +43,8 @@ interface IInitialStateService {
 	 * @param string $appName
 	 * @param string $key
 	 * @param bool|int|float|string|array|\JsonSerializable $data
+	 *
+	 * @deprecated 21 Use OCP\AppFramework\Services\IInitialState or OCP\AppFramework\Services\InitialStateProvider
 	 */
 	public function provideInitialState(string $appName, string $key, $data): void;
 
@@ -58,6 +60,8 @@ interface IInitialStateService {
 	 * @param string $appName
 	 * @param string $key
 	 * @param Closure $closure returns a primitive or an object that implements JsonSerializable
+	 *
+	 * @deprecated 21 Use OCP\AppFramework\Services\IInitialState or OCP\AppFramework\Services\InitialStateProvider
 	 */
 	public function provideLazyInitialState(string $appName, string $key, Closure $closure): void;
 }