Move more from \OC to PSR-4

* \OC\OCSClient
* \OC\Preview
* \OC\PreviewManager
* \OC\Repair
* \OC\RepairException
* \OC\Search
* \OC\ServerContainer
* \OC\ServerNotAvailableException
* \OC\ServiceUnavailableException
* \OC\Setup
* \OC\Streamer
* \OC\SubAdmin
* \OC\SystemConfig
* \OC\TagManager
* \OC\Tags
* \OC\TempManager
* \OC\TemplateLayout
* \OC\URLGenerator
* \OC\Updater

1 files changed, 342 insertions, 0 deletions

diff --git a/lib/private/PreviewManager.php b/lib/private/PreviewManager.php
new file mode 100644
index 00000000000..f3c7a4de0d0
--- /dev/null
+++ b/lib/private/PreviewManager.php
@@ -0,0 +1,342 @@
+<?php
+/**
+ * @author Joas Schilling <nickvergessen@owncloud.com>
+ * @author Morris Jobke <hey@morrisjobke.de>
+ * @author Olivier Paroz <github@oparoz.com>
+ * @author Robin Appelman <icewind@owncloud.com>
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OC;
+
+use OCP\IPreview;
+use OCP\Preview\IProvider;
+
+class PreviewManager implements IPreview {
+	/** @var \OCP\IConfig */
+	protected $config;
+
+	/** @var bool */
+	protected $providerListDirty = false;
+
+	/** @var bool */
+	protected $registeredCoreProviders = false;
+
+	/** @var array */
+	protected $providers = [];
+
+	/** @var array mime type => support status */
+	protected $mimeTypeSupportMap = [];
+
+	/** @var array */
+	protected $defaultProviders;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \OCP\IConfig $config
+	 */
+	public function __construct(\OCP\IConfig $config) {
+		$this->config = $config;
+	}
+
+	/**
+	 * In order to improve lazy loading a closure can be registered which will be
+	 * called in case preview providers are actually requested
+	 *
+	 * $callable has to return an instance of \OCP\Preview\IProvider
+	 *
+	 * @param string $mimeTypeRegex Regex with the mime types that are supported by this provider
+	 * @param \Closure $callable
+	 * @return void
+	 */
+	public function registerProvider($mimeTypeRegex, \Closure $callable) {
+		if (!$this->config->getSystemValue('enable_previews', true)) {
+			return;
+		}
+
+		if (!isset($this->providers[$mimeTypeRegex])) {
+			$this->providers[$mimeTypeRegex] = [];
+		}
+		$this->providers[$mimeTypeRegex][] = $callable;
+		$this->providerListDirty = true;
+	}
+
+	/**
+	 * Get all providers
+	 * @return array
+	 */
+	public function getProviders() {
+		if (!$this->config->getSystemValue('enable_previews', true)) {
+			return [];
+		}
+
+		$this->registerCoreProviders();
+		if ($this->providerListDirty) {
+			$keys = array_map('strlen', array_keys($this->providers));
+			array_multisort($keys, SORT_DESC, $this->providers);
+			$this->providerListDirty = false;
+		}
+
+		return $this->providers;
+	}
+
+	/**
+	 * Does the manager have any providers
+	 * @return bool
+	 */
+	public function hasProviders() {
+		$this->registerCoreProviders();
+		return !empty($this->providers);
+	}
+
+	/**
+	 * return a preview of a file
+	 *
+	 * @param string $file The path to the file where you want a thumbnail from
+	 * @param int $maxX The maximum X size of the thumbnail. It can be smaller depending on the shape of the image
+	 * @param int $maxY The maximum Y size of the thumbnail. It can be smaller depending on the shape of the image
+	 * @param boolean $scaleUp Scale smaller images up to the thumbnail size or not. Might look ugly
+	 * @return \OCP\IImage
+	 */
+	public function createPreview($file, $maxX = 100, $maxY = 75, $scaleUp = false) {
+		$preview = new \OC\Preview('', '/', $file, $maxX, $maxY, $scaleUp);
+		return $preview->getPreview();
+	}
+
+	/**
+	 * returns true if the passed mime type is supported
+	 *
+	 * @param string $mimeType
+	 * @return boolean
+	 */
+	public function isMimeSupported($mimeType = '*') {
+		if (!$this->config->getSystemValue('enable_previews', true)) {
+			return false;
+		}
+
+		if (isset($this->mimeTypeSupportMap[$mimeType])) {
+			return $this->mimeTypeSupportMap[$mimeType];
+		}
+
+		$this->registerCoreProviders();
+		$providerMimeTypes = array_keys($this->providers);
+		foreach ($providerMimeTypes as $supportedMimeType) {
+			if (preg_match($supportedMimeType, $mimeType)) {
+				$this->mimeTypeSupportMap[$mimeType] = true;
+				return true;
+			}
+		}
+		$this->mimeTypeSupportMap[$mimeType] = false;
+		return false;
+	}
+
+	/**
+	 * Check if a preview can be generated for a file
+	 *
+	 * @param \OCP\Files\FileInfo $file
+	 * @return bool
+	 */
+	public function isAvailable(\OCP\Files\FileInfo $file) {
+		if (!$this->config->getSystemValue('enable_previews', true)) {
+			return false;
+		}
+
+		$this->registerCoreProviders();
+		if (!$this->isMimeSupported($file->getMimetype())) {
+			return false;
+		}
+
+		$mount = $file->getMountPoint();
+		if ($mount and !$mount->getOption('previews', true)){
+			return false;
+		}
+
+		foreach ($this->providers as $supportedMimeType => $providers) {
+			if (preg_match($supportedMimeType, $file->getMimetype())) {
+				foreach ($providers as $closure) {
+					$provider = $closure();
+					if (!($provider instanceof IProvider)) {
+						continue;
+					}
+
+					/** @var $provider IProvider */
+					if ($provider->isAvailable($file)) {
+						return true;
+					}
+				}
+			}
+		}
+		return false;
+	}
+
+	/**
+	 * List of enabled default providers
+	 *
+	 * The following providers are enabled by default:
+	 *  - OC\Preview\PNG
+	 *  - OC\Preview\JPEG
+	 *  - OC\Preview\GIF
+	 *  - OC\Preview\BMP
+	 *  - OC\Preview\XBitmap
+	 *  - OC\Preview\MarkDown
+	 *  - OC\Preview\MP3
+	 *  - OC\Preview\TXT
+	 *
+	 * The following providers are disabled by default due to performance or privacy concerns:
+	 *  - OC\Preview\Font
+	 *  - OC\Preview\Illustrator
+	 *  - OC\Preview\Movie
+	 *  - OC\Preview\MSOfficeDoc
+	 *  - OC\Preview\MSOffice2003
+	 *  - OC\Preview\MSOffice2007
+	 *  - OC\Preview\OpenDocument
+	 *  - OC\Preview\PDF
+	 *  - OC\Preview\Photoshop
+	 *  - OC\Preview\Postscript
+	 *  - OC\Preview\StarOffice
+	 *  - OC\Preview\SVG
+	 *  - OC\Preview\TIFF
+	 *
+	 * @return array
+	 */
+	protected function getEnabledDefaultProvider() {
+		if ($this->defaultProviders !== null) {
+			return $this->defaultProviders;
+		}
+
+		$imageProviders = [
+			'OC\Preview\PNG',
+			'OC\Preview\JPEG',
+			'OC\Preview\GIF',
+			'OC\Preview\BMP',
+			'OC\Preview\XBitmap'
+		];
+
+		$this->defaultProviders = $this->config->getSystemValue('enabledPreviewProviders', array_merge([
+			'OC\Preview\MarkDown',
+			'OC\Preview\MP3',
+			'OC\Preview\TXT',
+		], $imageProviders));
+
+		if (in_array('OC\Preview\Image', $this->defaultProviders)) {
+			$this->defaultProviders = array_merge($this->defaultProviders, $imageProviders);
+		}
+		$this->defaultProviders = array_unique($this->defaultProviders);
+		return $this->defaultProviders;
+	}
+
+	/**
+	 * Register the default providers (if enabled)
+	 *
+	 * @param string $class
+	 * @param string $mimeType
+	 */
+	protected function registerCoreProvider($class, $mimeType, $options = []) {
+		if (in_array(trim($class, '\\'), $this->getEnabledDefaultProvider())) {
+			$this->registerProvider($mimeType, function () use ($class, $options) {
+				return new $class($options);
+			});
+		}
+	}
+
+	/**
+	 * Register the default providers (if enabled)
+	 */
+	protected function registerCoreProviders() {
+		if ($this->registeredCoreProviders) {
+			return;
+		}
+		$this->registeredCoreProviders = true;
+
+		$this->registerCoreProvider('OC\Preview\TXT', '/text\/plain/');
+		$this->registerCoreProvider('OC\Preview\MarkDown', '/text\/(x-)?markdown/');
+		$this->registerCoreProvider('OC\Preview\PNG', '/image\/png/');
+		$this->registerCoreProvider('OC\Preview\JPEG', '/image\/jpeg/');
+		$this->registerCoreProvider('OC\Preview\GIF', '/image\/gif/');
+		$this->registerCoreProvider('OC\Preview\BMP', '/image\/bmp/');
+		$this->registerCoreProvider('OC\Preview\XBitmap', '/image\/x-xbitmap/');
+		$this->registerCoreProvider('OC\Preview\MP3', '/audio\/mpeg/');
+
+		// SVG, Office and Bitmap require imagick
+		if (extension_loaded('imagick')) {
+			$checkImagick = new \Imagick();
+
+			$imagickProviders = [
+				'SVG'	=> ['mimetype' => '/image\/svg\+xml/', 'class' => '\OC\Preview\SVG'],
+				'TIFF'	=> ['mimetype' => '/image\/tiff/', 'class' => '\OC\Preview\TIFF'],
+				'PDF'	=> ['mimetype' => '/application\/pdf/', 'class' => '\OC\Preview\PDF'],
+				'AI'	=> ['mimetype' => '/application\/illustrator/', 'class' => '\OC\Preview\Illustrator'],
+				'PSD'	=> ['mimetype' => '/application\/x-photoshop/', 'class' => '\OC\Preview\Photoshop'],
+				'EPS'	=> ['mimetype' => '/application\/postscript/', 'class' => '\OC\Preview\Postscript'],
+				'TTF'	=> ['mimetype' => '/application\/(?:font-sfnt|x-font$)/', 'class' => '\OC\Preview\Font'],
+			];
+
+			foreach ($imagickProviders as $queryFormat => $provider) {
+				$class = $provider['class'];
+				if (!in_array(trim($class, '\\'), $this->getEnabledDefaultProvider())) {
+					continue;
+				}
+
+				if (count($checkImagick->queryFormats($queryFormat)) === 1) {
+					$this->registerCoreProvider($class, $provider['mimetype']);
+				}
+			}
+
+			if (count($checkImagick->queryFormats('PDF')) === 1) {
+				// Office previews are currently not supported on Windows
+				if (!\OC_Util::runningOnWindows() && \OC_Helper::is_function_enabled('shell_exec')) {
+					$officeFound = is_string($this->config->getSystemValue('preview_libreoffice_path', null));
+
+					if (!$officeFound) {
+						//let's see if there is libreoffice or openoffice on this machine
+						$whichLibreOffice = shell_exec('command -v libreoffice');
+						$officeFound = !empty($whichLibreOffice);
+						if (!$officeFound) {
+							$whichOpenOffice = shell_exec('command -v openoffice');
+							$officeFound = !empty($whichOpenOffice);
+						}
+					}
+
+					if ($officeFound) {
+						$this->registerCoreProvider('\OC\Preview\MSOfficeDoc', '/application\/msword/');
+						$this->registerCoreProvider('\OC\Preview\MSOffice2003', '/application\/vnd.ms-.*/');
+						$this->registerCoreProvider('\OC\Preview\MSOffice2007', '/application\/vnd.openxmlformats-officedocument.*/');
+						$this->registerCoreProvider('\OC\Preview\OpenDocument', '/application\/vnd.oasis.opendocument.*/');
+						$this->registerCoreProvider('\OC\Preview\StarOffice', '/application\/vnd.sun.xml.*/');
+					}
+				}
+			}
+		}
+
+		// Video requires avconv or ffmpeg and is therefor
+		// currently not supported on Windows.
+		if (in_array('OC\Preview\Movie', $this->getEnabledDefaultProvider()) && !\OC_Util::runningOnWindows()) {
+			$avconvBinary = \OC_Helper::findBinaryPath('avconv');
+			$ffmpegBinary = ($avconvBinary) ? null : \OC_Helper::findBinaryPath('ffmpeg');
+
+			if ($avconvBinary || $ffmpegBinary) {
+				// FIXME // a bit hacky but didn't want to use subclasses
+				\OC\Preview\Movie::$avconvBinary = $avconvBinary;
+				\OC\Preview\Movie::$ffmpegBinary = $ffmpegBinary;
+
+				$this->registerCoreProvider('\OC\Preview\Movie', '/video\/.*/');
+			}
+		}
+	}
+}