1 files changed, 97 insertions, 0 deletions
diff --git a/core/Controller/SvgController.php b/core/Controller/SvgController.php
new file mode 100644
index 00000000000..b2202f88a24
--- /dev/null
+++ b/core/Controller/SvgController.php
@@ -0,0 +1,97 @@
+<?php
+declare (strict_types = 1);
+/**
+ * @copyright Copyright (c) 2018, John Molakvoæ (skjnldsv@protonmail.com)
+ *
+ * @author John Molakvoæ (skjnldsv) <skjnldsv@protonmail.com>
+ *
+ * @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\Core\Controller;
+
+use OCP\AppFramework\Controller;
+use OCP\AppFramework\Http;
+use OCP\AppFramework\Http\DataDisplayResponse;
+use OCP\AppFramework\Http\NotFoundResponse;
+use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\Files\NotFoundException;
+use OCP\IRequest;
+
+class SvgController extends Controller {
+
+	/** @var string */
+	protected $serverRoot;
+
+	/** @var ITimeFactory */
+	protected $timeFactory;
+
+	public function __construct(string $appName,
+								IRequest $request,
+								ITimeFactory $timeFactory) {
+		parent::__construct($appName, $request);
+
+		$this->serverRoot  = \OC::$SERVERROOT;
+		$this->timeFactory = $timeFactory;
+	}
+
+	/**
+	 * @NoAdminRequired
+	 * @NoCSRFRequired
+	 *
+	 * Generate svg from filename with the requested color
+	 *
+	 * @param string $fileName
+	 * @param string $color
+	 * @return DataDisplayResponse|NotFoundException
+	 */
+	public function getSvg(string $fileName, $color = 'ffffff') {
+		$path = $this->serverRoot . "/core/img/actions/$fileName.svg";
+		if (!file_exists($path)) {
+			return new NotFoundResponse();
+		}
+
+		$svg = file_get_contents($path);
+
+		if (is_null($svg)) {
+			return new NotFoundResponse();
+		}
+
+		// add fill (fill is not present on black elements)
+		$fillRe = '/<((circle|rect|path)((?!fill)[a-z0-9 =".\-#])+)\/>/mi';
+
+		$svg = preg_replace($fillRe, '<$1 fill="#' . $color . '"/>', $svg);
+
+		// replace any fill or stroke colors
+		$svg = preg_replace('/stroke="#([a-z0-9]{3,6})"/mi', 'stroke="#' . $color . '"', $svg);
+		$svg = preg_replace('/fill="#([a-z0-9]{3,6})"/mi', 'fill="#' . $color . '"', $svg);
+
+		$response = new DataDisplayResponse($svg, Http::STATUS_OK, ['Content-Type' => 'image/svg+xml']);
+
+		// Set cache control
+		$ttl = 31536000;
+		$response->addHeader('Cache-Control', 'max-age=' . $ttl . ', immutable');
+		$response->addHeader('Content-Disposition', 'inline; filename="' . $fileName . '.svg"');
+		$expires = new \DateTime();
+		$expires->setTimestamp($this->timeFactory->getTime());
+		$expires->add(new \DateInterval('PT' . $ttl . 'S'));
+		$response->addHeader('Expires', $expires->format(\DateTime::RFC1123));
+		$response->addHeader('Pragma', 'cache');
+
+		return $response;
+	}
+}
+\ No newline at end of file