Move theming js to initial state

A bit more elegant. Plus it will allow us to also write a proper
@nextcloud/theming package. To make life easier down the line for all.

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>
Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

apps/theming/appinfo/app.php

 	]
 );
 
-$linkToJs = \OC::$server->getURLGenerator()->linkToRoute(
-	'theming.Theming.getJavascript',
-	[
-		'v' => \OC::$server->getConfig()->getAppValue('theming', 'cachebuster', '0'),
-	]
-);
-\OCP\Util::addHeader(
-	'script',
-	[
-		'src' => $linkToJs,
-		'nonce' => \OC::$server->getContentSecurityPolicyNonceManager()->getNonce()
-	], ''
-);
+\OCP\Util::addScript('theming', 'theming');

apps/theming/appinfo/routes.php

 		'url' => '/image/{key}',
 		'verb' => 'GET',
 	],
-	[
-		'name' => 'Theming#getJavascript',
-		'url' => '/js/theming',
-		'verb' => 'GET',
-	],
 	[
 		'name' => 'Theming#getManifest',
 		'url' => '/manifest/{app}',

apps/theming/js/theming.js

+OCA.Theming = OCP.InitialState.loadState('theming', 'data')

apps/theming/lib/AppInfo/Application.php

 
 namespace OCA\Theming\AppInfo;
 
+use OCA\Theming\Service\JSDataService;
+use OCP\AppFramework\IAppContainer;
+use OCP\IInitialStateService;
+
 class Application extends \OCP\AppFramework\App {
+	public const APP_ID = 'theming';
+
 	public function __construct() {
-		parent::__construct('theming', []);
+		parent::__construct(self::APP_ID);
+
+		$container = $this->getContainer();
+		$this->registerInitialState($container);
+	}
+
+	private function registerInitialState(IAppContainer $container) {
+		/** @var IInitialStateService $initialState */
+		$initialState = $container->query(IInitialStateService::class);
+
+		$initialState->provideLazyInitialState(self::APP_ID, 'data', function () use ($container) {
+			/** @var JSDataService $data */
+			$data = $container->query(JSDataService::class);
+			return $data;
+		});
 	}
 }

apps/theming/lib/Controller/ThemingController.php

 use OC\Template\SCSSCacher;
 use OCA\Theming\ImageManager;
 use OCA\Theming\ThemingDefaults;
-use OCA\Theming\Util;
 use OCP\App\IAppManager;
 use OCP\AppFramework\Controller;
 use OCP\AppFramework\Http;
-use OCP\AppFramework\Http\DataDownloadResponse;
 use OCP\AppFramework\Http\DataResponse;
 use OCP\AppFramework\Http\FileDisplayResponse;
 use OCP\AppFramework\Http\NotFoundResponse;
 class ThemingController extends Controller {
 	/** @var ThemingDefaults */
 	private $themingDefaults;
-	/** @var Util */
-	private $util;
 	/** @var IL10N */
 	private $l10n;
 	/** @var IConfig */
 	 * @param IRequest $request
 	 * @param IConfig $config
 	 * @param ThemingDefaults $themingDefaults
-	 * @param Util $util
 	 * @param IL10N $l
 	 * @param ITempManager $tempManager
 	 * @param IAppData $appData
 		IRequest $request,
 		IConfig $config,
 		ThemingDefaults $themingDefaults,
-		Util $util,
 		IL10N $l,
 		ITempManager $tempManager,
 		IAppData $appData,
 		parent::__construct($appName, $request);
 
 		$this->themingDefaults = $themingDefaults;
-		$this->util = $util;
 		$this->l10n = $l;
 		$this->config = $config;
 		$this->tempManager = $tempManager;
 		}
 	}
 
-	/**
-	 * @NoCSRFRequired
-	 * @PublicPage
-	 * @NoSameSiteCookieRequired
-	 *
-	 * @return DataDownloadResponse
-	 */
-	public function getJavascript() {
-		$cacheBusterValue = $this->config->getAppValue('theming', 'cachebuster', '0');
-		$responseJS = '(function() {
-	OCA.Theming = {
-		name: ' . json_encode($this->themingDefaults->getName()) . ',
-		url: ' . json_encode($this->themingDefaults->getBaseUrl()) . ',
-		slogan: ' . json_encode($this->themingDefaults->getSlogan()) . ',
-		color: ' . json_encode($this->themingDefaults->getColorPrimary()) . ',
-		imprintUrl: ' . json_encode($this->themingDefaults->getImprintUrl()) . ',
-		privacyUrl: ' . json_encode($this->themingDefaults->getPrivacyUrl()) . ',
-		inverted: ' . json_encode($this->util->invertTextColor($this->themingDefaults->getColorPrimary())) . ',
-		cacheBuster: ' . json_encode($cacheBusterValue) . '
-	};
-})();';
-		$response = new DataDownloadResponse($responseJS, 'javascript', 'text/javascript');
-		$response->cacheFor(3600);
-		return $response;
-	}
-
 	/**
 	 * @NoCSRFRequired
 	 * @PublicPage

apps/theming/lib/Service/JSDataService.php

+<?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 OCA\Theming\Service;
+
+use OCA\Theming\AppInfo\Application;
+use OCA\Theming\ThemingDefaults;
+use OCA\Theming\Util;
+use OCP\IConfig;
+
+class JSDataService implements \JsonSerializable {
+
+	/** @var ThemingDefaults */
+	private $themingDefaults;
+	/** @var Util */
+	private $util;
+	/** @var IConfig */
+	private $appConfig;
+
+	public function __construct(
+		ThemingDefaults $themingDefaults,
+		Util $util,
+		IConfig $appConfig
+	) {
+		$this->themingDefaults = $themingDefaults;
+		$this->util = $util;
+		$this->appConfig = $appConfig;
+	}
+
+	public function jsonSerialize() {
+		return [
+			'name' => $this->themingDefaults->getName(),
+			'url' => $this->themingDefaults->getBaseUrl(),
+			'slogan' => $this->themingDefaults->getSlogan(),
+			'color' => $this->themingDefaults->getColorPrimary(),
+			'imprintUrl' => $this->themingDefaults->getImprintUrl(),
+			'privacyUrl' => $this->themingDefaults->getPrivacyUrl(),
+			'inverted' => $this->util->invertTextColor($this->themingDefaults->getColorPrimary()),
+			'cacheBuster' => $this->appConfig->getAppValue(Application::class, 'cachebuster', '0'),
+		];
+	}
+}

apps/theming/tests/Controller/ThemingControllerTest.php

 use OCA\Theming\Controller\ThemingController;
 use OCA\Theming\ImageManager;
 use OCA\Theming\ThemingDefaults;
-use OCA\Theming\Util;
 use OCP\App\IAppManager;
 use OCP\AppFramework\Http;
 use OCP\AppFramework\Http\DataResponse;
 	private $config;
 	/** @var ThemingDefaults|\PHPUnit_Framework_MockObject_MockObject */
 	private $themingDefaults;
-	/** @var Util */
-	private $util;
 	/** @var \OCP\AppFramework\Utility\ITimeFactory */
 	private $timeFactory;
 	/** @var IL10N|\PHPUnit_Framework_MockObject_MockObject */
 		$this->l10n = $this->createMock(L10N::class);
 		$this->appData = $this->createMock(IAppData::class);
 		$this->appManager = $this->createMock(IAppManager::class);
-		$this->util = new Util($this->config, $this->appManager, $this->appData);
 		$this->tempManager = \OC::$server->getTempManager();
 		$this->scssCacher = $this->createMock(SCSSCacher::class);
 		$this->urlGenerator = $this->createMock(IURLGenerator::class);
 			$this->request,
 			$this->config,
 			$this->themingDefaults,
-			$this->util,
 			$this->l10n,
 			$this->tempManager,
 			$this->appData,
 		$this->assertEquals($response, $actual);
 	}
 
-	public function testGetJavascript() {
-		$this->themingDefaults
-			->expects($this->at(0))
-			->method('getName')
-			->willReturn("");
-		$this->themingDefaults
-			->expects($this->at(1))
-			->method('getBaseUrl')
-			->willReturn("");
-		$this->themingDefaults
-			->expects($this->at(2))
-			->method('getSlogan')
-			->willReturn("");
-		$this->themingDefaults
-			->expects($this->at(3))
-			->method('getColorPrimary')
-			->willReturn("#000");
-
-
-		$expectedResponse = '(function() {
-	OCA.Theming = {
-		name: "",
-		url: "",
-		slogan: "",
-		color: "#000",
-		imprintUrl: null,
-		privacyUrl: null,
-		inverted: false,
-		cacheBuster: null
-	};
-})();';
-		$expected = new Http\DataDownloadResponse($expectedResponse, 'javascript', 'text/javascript');
-		$expected->cacheFor(3600);
-		@$this->assertEquals($expected, $this->themingController->getJavascript());
-	}
-	public function testGetJavascriptInverted() {
-		$this->themingDefaults
-			->expects($this->at(0))
-			->method('getName')
-			->willReturn("Nextcloud");
-		$this->themingDefaults
-			->expects($this->at(1))
-			->method('getBaseUrl')
-			->willReturn("nextcloudurl");
-		$this->themingDefaults
-			->expects($this->at(2))
-			->method('getSlogan')
-			->willReturn("awesome");
-		$this->themingDefaults
-			->expects($this->any())
-			->method('getColorPrimary')
-			->willReturn("#ffffff");
-
-		$expectedResponse = '(function() {
-	OCA.Theming = {
-		name: "Nextcloud",
-		url: "nextcloudurl",
-		slogan: "awesome",
-		color: "#ffffff",
-		imprintUrl: null,
-		privacyUrl: null,
-		inverted: true,
-		cacheBuster: null
-	};
-})();';
-		$expected = new Http\DataDownloadResponse($expectedResponse, 'javascript', 'text/javascript');
-		$expected->cacheFor(3600);
-		@$this->assertEquals($expected, $this->themingController->getJavascript());
-	}
-
 	public function testGetManifest() {
 		$this->config
 			->expects($this->once())