Allow apps to register an initial state

apps/twofactor_backupcodes/lib/Provider/BackupCodesProvider.php

@@ -29,6 +29,7 @@
 use OCP\Authentication\TwoFactorAuth\IPersonalProviderSettings;
 use OCP\Authentication\TwoFactorAuth\IProvider;
 use OCP\Authentication\TwoFactorAuth\IProvidesPersonalSettings;
+use OCP\IInitialStateService;
 use OCP\IL10N;
 use OCP\IUser;
 use OCP\Template;
@@ -46,18 +47,25 @@ class BackupCodesProvider implements IProvider, IProvidesPersonalSettings {
 
 	/** @var AppManager */
 	private $appManager;
+	/** @var IInitialStateService */
+	private $initialStateService;
 
 	/**
 	 * @param string $appName
 	 * @param BackupCodeStorage $storage
 	 * @param IL10N $l10n
 	 * @param AppManager $appManager
 	 */
-	public function __construct(string $appName, BackupCodeStorage $storage, IL10N $l10n, AppManager $appManager) {
+	public function __construct(string $appName,
+								BackupCodeStorage $storage,
+								IL10N $l10n,
+								AppManager $appManager,
+								IInitialStateService $initialStateService) {
 		$this->appName = $appName;
 		$this->l10n = $l10n;
 		$this->storage = $storage;
 		$this->appManager = $appManager;
+		$this->initialStateService = $initialStateService;
 	}
 
 	/**
@@ -149,7 +157,8 @@ public function isActive(IUser $user): bool {
 	 */
 	public function getPersonalSettings(IUser $user): IPersonalProviderSettings {
 		$state = $this->storage->getBackupCodesState($user);
-		return new Personal(base64_encode(json_encode($state)));
+		$this->initialStateService->provideInitialState($this->appName, $state);
+		return new Personal();
 	}
 
 }

apps/twofactor_backupcodes/lib/Settings/Personal.php

@@ -28,18 +28,8 @@
 use OCP\Template;
 
 class Personal implements IPersonalProviderSettings {
-
-	/** @var string */
-	private $state;
-
-	public function __construct(string $state) {
-		$this->state = $state;
-	}
-
 	public function getBody(): Template {
-		$template = new Template('twofactor_backupcodes', 'personal');
-		$template->assign('state', $this->state);
-		return $template;
+		return new Template('twofactor_backupcodes', 'personal');
 	}
 
 }

apps/twofactor_backupcodes/src/settings.js

@@ -4,9 +4,9 @@ import store from './store';
 
 Vue.prototype.t = t;
 
-const initialStateElem = document.getElementById('twofactor-backupcodes-initial-state');
+const initialState = OCP.InitialState.loadState('twofactor_backupcodes');
 store.replaceState(
-	JSON.parse(atob(initialStateElem.value))
+	initialState
 )
 
 const View = Vue.extend(PersonalSettings)

apps/twofactor_backupcodes/tests/Unit/Provider/BackupCodesProviderTest.php

@@ -25,6 +25,7 @@
 use OC\App\AppManager;
 use OCA\TwoFactorBackupCodes\Provider\BackupCodesProvider;
 use OCA\TwoFactorBackupCodes\Service\BackupCodeStorage;
+use OCP\IInitialStateService;
 use OCP\IL10N;
 use OCP\IUser;
 use OCP\Template;
@@ -45,6 +46,9 @@ class BackupCodesProviderTest extends TestCase {
 	/** @var AppManager|PHPUnit_Framework_MockObject_MockObject */
 	private $appManager;
 
+	/** @var IInitialStateService|PHPUnit_Framework_MockObject_MockObject */
+	private $initialState;
+
 	/** @var BackupCodesProvider */
 	private $provider;
 
@@ -55,8 +59,9 @@ protected function setUp() {
 		$this->storage = $this->createMock(BackupCodeStorage::class);
 		$this->l10n = $this->createMock(IL10N::class);
 		$this->appManager = $this->createMock(AppManager::class);
+		$this->initialState = $this->createMock(IInitialStateService::class);
 
-		$this->provider = new BackupCodesProvider($this->appName, $this->storage, $this->l10n, $this->appManager);
+		$this->provider = new BackupCodesProvider($this->appName, $this->storage, $this->l10n, $this->appManager, $this->initialState);
 	}
 
 	public function testGetId() {

core/src/OCP/index.js

@@ -2,8 +2,10 @@
  *
  */
 import loader from './loader'
+import initialState from './initialstate'
 
 /** @namespace OCP */
 export default {
 	Loader: loader,
+	InitialState: initialState,
 };

core/src/OCP/initialstate.js

@@ -0,0 +1,42 @@
+/*
+ * @copyright Copyright (c) 2019 Roeland Jago Douma <[email protected]>
+ *
+ * @author Roeland Jago Douma <[email protected]>
+ *
+ * @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
+ * @class InitialState
+ */
+export default {
+	loadState: function(app) {
+		const elem = document.querySelector('#initial-state-' + app);
+		if (elem === null) {
+			console.error('Could not find initial state of ' + app);
+			throw new Error('Could not find initial state of ' + app);
+		}
+
+		try {
+			return JSON.parse(atob(elem.value));
+		} catch (e) {
+			console.error('Could not parse initial state of ' + app);
+			throw new Error('Could not parse initial state of ' + app);
+		}
+	},
+}

core/templates/layout.base.php

@@ -18,6 +18,9 @@
 	</head>
 	<body id="body-public" class="layout-base">
 		<?php include 'layout.noscript.warning.php'; ?>
+		<?php foreach ($_['initialStates'] as $app => $initialState) { ?>
+			<input type="hidden" id="initial-state-<?php p($app); ?>" value="<?php p(base64_encode($initialState)); ?>">
+		<?php }?>
 		<div id="content" class="app-public" role="main">
 			<?php print_unescaped($_['content']); ?>
 		</div>

core/templates/layout.guest.php

@@ -20,6 +20,9 @@
 	</head>
 	<body id="<?php p($_['bodyid']);?>">
 		<?php include 'layout.noscript.warning.php'; ?>
+		<?php foreach ($_['initialStates'] as $app => $initialState) { ?>
+			<input type="hidden" id="initial-state-<?php p($app); ?>" value="<?php p(base64_encode($initialState)); ?>">
+		<?php }?>
 		<div class="wrapper">
 			<div class="v-align">
 				<?php if ($_['bodyid'] === 'body-login' ): ?>

core/templates/layout.public.php

@@ -27,6 +27,9 @@
 </head>
 <body id="<?php p($_['bodyid']);?>">
 <?php include('layout.noscript.warning.php'); ?>
+<?php foreach ($_['initialStates'] as $app => $initialState) { ?>
+	<input type="hidden" id="initial-state-<?php p($app); ?>" value="<?php p(base64_encode($initialState)); ?>">
+<?php }?>
 	<div id="notification-container">
 		<div id="notification"></div>
 	</div>

core/templates/layout.user.php

@@ -28,6 +28,10 @@
 	<body id="<?php p($_['bodyid']);?>">
 	<?php include 'layout.noscript.warning.php'; ?>
 
+		<?php foreach ($_['initialStates'] as $app => $initialState) { ?>
+			<input type="hidden" id="initial-state-<?php p($app); ?>" value="<?php p(base64_encode($initialState)); ?>">
+		<?php }?>
+
 		<a href="#app-content" class="button primary skip-navigation skip-content"><?php p($l->t('Skip to main content')); ?></a>
 		<a href="#app-navigation" class="button primary skip-navigation"><?php p($l->t('Skip to navigation of app')); ?></a>
 

lib/composer/composer/autoload_classmap.php

@@ -284,6 +284,7 @@
     'OCP\\IGroup' => $baseDir . '/lib/public/IGroup.php',
     'OCP\\IGroupManager' => $baseDir . '/lib/public/IGroupManager.php',
     'OCP\\IImage' => $baseDir . '/lib/public/IImage.php',
+    'OCP\\IInitialStateService' => $baseDir . '/lib/public/IInitialStateService.php',
     'OCP\\IL10N' => $baseDir . '/lib/public/IL10N.php',
     'OCP\\ILogger' => $baseDir . '/lib/public/ILogger.php',
     'OCP\\IMemcache' => $baseDir . '/lib/public/IMemcache.php',
@@ -854,6 +855,7 @@
     'OC\\Http\\Client\\ClientService' => $baseDir . '/lib/private/Http/Client/ClientService.php',
     'OC\\Http\\Client\\Response' => $baseDir . '/lib/private/Http/Client/Response.php',
     'OC\\Http\\CookieHelper' => $baseDir . '/lib/private/Http/CookieHelper.php',
+    'OC\\InitialStateService' => $baseDir . '/lib/private/InitialStateService.php',
     'OC\\Installer' => $baseDir . '/lib/private/Installer.php',
     'OC\\IntegrityCheck\\Checker' => $baseDir . '/lib/private/IntegrityCheck/Checker.php',
     'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException' => $baseDir . '/lib/private/IntegrityCheck/Exceptions/InvalidSignatureException.php',

lib/composer/composer/autoload_static.php

@@ -314,6 +314,7 @@ class ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c
         'OCP\\IGroup' => __DIR__ . '/../../..' . '/lib/public/IGroup.php',
         'OCP\\IGroupManager' => __DIR__ . '/../../..' . '/lib/public/IGroupManager.php',
         'OCP\\IImage' => __DIR__ . '/../../..' . '/lib/public/IImage.php',
+        'OCP\\IInitialStateService' => __DIR__ . '/../../..' . '/lib/public/IInitialStateService.php',
         'OCP\\IL10N' => __DIR__ . '/../../..' . '/lib/public/IL10N.php',
         'OCP\\ILogger' => __DIR__ . '/../../..' . '/lib/public/ILogger.php',
         'OCP\\IMemcache' => __DIR__ . '/../../..' . '/lib/public/IMemcache.php',
@@ -884,6 +885,7 @@ class ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c
         'OC\\Http\\Client\\ClientService' => __DIR__ . '/../../..' . '/lib/private/Http/Client/ClientService.php',
         'OC\\Http\\Client\\Response' => __DIR__ . '/../../..' . '/lib/private/Http/Client/Response.php',
         'OC\\Http\\CookieHelper' => __DIR__ . '/../../..' . '/lib/private/Http/CookieHelper.php',
+        'OC\\InitialStateService' => __DIR__ . '/../../..' . '/lib/private/InitialStateService.php',
         'OC\\Installer' => __DIR__ . '/../../..' . '/lib/private/Installer.php',
         'OC\\IntegrityCheck\\Checker' => __DIR__ . '/../../..' . '/lib/private/IntegrityCheck/Checker.php',
         'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException' => __DIR__ . '/../../..' . '/lib/private/IntegrityCheck/Exceptions/InvalidSignatureException.php',

lib/private/InitialStateService.php

@@ -0,0 +1,74 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019, Roeland Jago Douma <[email protected]>
+ *
+ * @author Roeland Jago Douma <[email protected]>
+ *
+ * @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 OC;
+
+use OCP\IInitialStateService;
+use OCP\ILogger;
+
+class InitialStateService implements IInitialStateService {
+
+	/** @var ILogger */
+	private $logger;
+
+	/** @var array */
+	private $states = [];
+
+	/** @var array */
+	private $lazyStates = [];
+
+	public function __construct(ILogger $logger) {
+		$this->logger = $logger;
+	}
+
+	public function provideInitialState(string $appName, $data) {
+		// Scalars and JsonSerializable are fine
+		if (is_scalar($data) || $data instanceof \JsonSerializable || is_array($data)) {
+			$this->states[$appName] = json_encode($data);
+			return;
+		}
+
+		$this->logger->warning('Invalid data provided to provideInitialState by ' . $appName);
+	}
+
+	public function provideLazyInitialState(string $appName, \Closure $closure) {
+		$this->lazyStates[$appName] = $closure;
+	}
+
+	public function getInitialStates(): array {
+		$states = $this->states;
+		foreach ($this->lazyStates as $app => $lazyState) {
+			$state = $lazyState();
+
+			if (!($lazyState instanceof \JsonSerializable)) {
+				$this->logger->warning($app . ' provided an invalid lazy state');
+			}
+
+			$states[$app] = json_encode($state);
+		}
+
+		return $states;
+	}
+
+}

lib/private/Server.php

@@ -144,6 +144,7 @@
 use OCP\Group\ISubAdmin;
 use OCP\ICacheFactory;
 use OCP\IDBConnection;
+use OCP\IInitialStateService;
 use OCP\IL10N;
 use OCP\IServerContainer;
 use OCP\ITempManager;
@@ -1204,6 +1205,8 @@ public function __construct($webRoot, \OC\Config $config) {
 
 		$this->registerAlias(ISubAdmin::class, SubAdmin::class);
 
+		$this->registerAlias(IInitialStateService::class, InitialStateService::class);
+
 		$this->connectDispatcher();
 	}
 

lib/private/TemplateLayout.php

@@ -220,6 +220,10 @@ public function __construct( $renderAs, $appId = '' ) {
 
 			}
 		}
+
+		/** @var InitialStateService $initialState */
+		$initialState = \OC::$server->query(InitialStateService::class);
+		$this->assign('initialStates', $initialState->getInitialStates());
 	}
 
 	/**

lib/public/IInitialStateService.php

@@ -0,0 +1,56 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019, Roeland Jago Douma <[email protected]>
+ *
+ * @author Roeland Jago Douma <[email protected]>
+ *
+ * @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;
+
+/**
+ * @since 16.0.0
+ */
+interface IInitialStateService {
+	/**
+	 * Allows an app to provide its initial state to the template system.
+	 * Use this if you know your initial state sill be used for example if
+	 * you are in the render function of you controller.
+	 *
+	 * @since 16.0.0
+	 *
+	 * @param string $appName
+	 * @param bool|int|float|string|array|\JsonSerializable $data
+	 */
+	public function provideInitialState(string $appName, $data);
+
+	/**
+	 * Allows an app to provide its initial state via a lazy method.
+	 * This will call the closure when the template is being generated.
+	 * Use this if your app is injected into pages. Since then the render method
+	 * is not called explicitly. But we do not want to load the state on webdav
+	 * requests for example.
+	 *
+	 * @since 16.0.0
+	 *
+	 * @param string $appName
+	 * @param \Closure $closure Has to return an object that implements JsonSerializable
+	 */
+	public function provideLazyInitialState(string $appName, \Closure $closure);
+}