1 files changed, 160 insertions, 0 deletions

diff --git a/service/infoservice.php b/service/infoservice.php
index c07b101d..cbc23fa8 100644
--- a/service/infoservice.php
+++ b/service/infoservice.php
@@ -12,6 +12,8 @@
 
 namespace OCA\GalleryPlus\Service;
 
+use Symfony\Component\Yaml\Yaml;
+
 use OCP\Files\Folder;
 use OCP\Files\File;
 use OCP\Files\Node;
@@ -120,6 +122,42 @@ class InfoService extends Service {
 	}
 
 	/**
+	 * Returns information about the currently selected folder
+	 *
+	 *    * privacy setting
+	 *    * special configuration
+	 *    * permissions
+	 *    * ID
+	 *
+	 * @param Folder $folderNode
+	 * @param string $folderPathFromRoot
+	 *
+	 * @return array<string,string|int>
+	 */
+	public function getAlbumInfo($folderNode, $folderPathFromRoot) {
+		$configName = 'gallery.cnf';
+		$privacyChecker = '.nomedia';
+		$albumInfo = [];
+		list ($albumConfig, $privateAlbum) =
+			$this->getAlbumConfig($folderNode, $privacyChecker, $configName);
+
+		if (!$privateAlbum) {
+			$path = str_replace($folderPathFromRoot, '', $folderNode->getPath());
+			if (rtrim($folderPathFromRoot, '/') === $folderNode->getPath()) {
+				$path = '';
+			}
+			$albumInfo = [
+				'path'        => $path,
+				'fileid'      => $folderNode->getID(),
+				'permissions' => $folderNode->getPermissions()
+			];
+			$albumInfo = array_merge($albumInfo, $albumConfig);
+		}
+
+		return [$albumInfo, $privateAlbum];
+	}
+
+	/**
 	 * This returns the list of all images which can be shown starting from the given folder
 	 *
 	 * If the starting URL is one of a fullscreen preview, we'll return the images of the
@@ -145,6 +183,128 @@ class InfoService extends Service {
 	}
 
 	/**
+	 * Returns an album configuration array
+	 *
+	 * @param Folder $folder
+	 * @param string $privacyChecker
+	 * @param string $configName
+	 * @param int $level
+	 * @param array $configArray
+	 * @param bool $configComplete
+	 *
+	 * @return array <null|string,string>
+	 */
+	private function getAlbumConfig(
+		$folder, $privacyChecker, $configName, $level = 0, $configArray = [],
+		$configComplete = false
+	) {
+		if ($folder->nodeExists($privacyChecker)) {
+			// Cancel as soon as we find out that the folder is private
+			return [null, true];
+		}
+		list($configArray, $configComplete) =
+			$this->parseConfig($folder, $configName, $configArray, $configComplete, $level);
+		$parentFolder = $folder->getParent();
+		$path = $parentFolder->getPath();
+		if ($path !== '' && $path !== '/') {
+			$level++;
+
+			return $this->getAlbumConfig(
+				$parentFolder, $privacyChecker, $configName, $level, $configArray, $configComplete
+			);
+		}
+
+		// We have reached the root folder
+		return [$configArray, false];
+	}
+
+	/**
+	 * Returns a parsed configuration if one was found in the current folder
+	 *
+	 * @param Folder $folder
+	 * @param string $configName
+	 * @param array $currentConfigArray
+	 * @param bool $configComplete
+	 * @param int $level
+	 *
+	 * @return bool
+	 */
+	private function parseConfig(
+		$folder, $configName, $currentConfigArray, $configComplete, $level
+	) {
+		$configArray = $currentConfigArray;
+		// Let's try to find the missing information in the configuration located in this folder
+		if (!$configComplete && $folder->nodeExists($configName)) {
+			/** @type File $configFile */
+			$configFile = $folder->get($configName);
+			try {
+				$rawConfig = $configFile->getContent();
+				$saneConfig = $this->bomFixer($rawConfig);
+				$parsedConfigArray = Yaml::parse($saneConfig);
+				list($configArray, $configComplete) =
+					$this->validateConfig($currentConfigArray, $parsedConfigArray, $level);
+			} catch (\Exception $exception) {
+				$this->logger->debug(
+					"Problem while parsing the configuration file : {path}",
+					['path' => $folder->getPath() . '/' . $configFile->getPath()]
+				);
+			}
+		}
+
+		return [$configArray, $configComplete];
+	}
+
+	/**
+	 * Removes the BOM from a file
+	 *
+	 * http://us.php.net/manual/en/function.pack.php#104151
+	 *
+	 * @param string $file
+	 *
+	 * @return string
+	 */
+	private function bomFixer($file) {
+		$bom = pack("CCC", 0xef, 0xbb, 0xbf);
+		if (strncmp($file, $bom, 3) === 0) {
+			$file = substr($file, 3);
+		}
+
+		return $file;
+	}
+
+	/**
+	 * Returns either the local config or one merged with a config containing sorting information
+	 *
+	 * @param array $currentConfigArray
+	 * @param array $parsedConfigArray
+	 * @param int $level
+	 *
+	 * @return array
+	 */
+	private function validateConfig($currentConfigArray, $parsedConfigArray, $level) {
+		$configComplete = false;
+		$sorting = $parsedConfigArray['sorting'];
+		$sortOrder = $parsedConfigArray['sort_order'];
+		$configArray = $parsedConfigArray;
+		if ($sorting) {
+			$configComplete = true;
+			if ($level > 0) {
+				// We only need the sorting information
+				$currentConfigArray['sorting'] = $sorting;
+				$currentConfigArray['sort_order'] = $sortOrder;
+				$configArray = $currentConfigArray;
+			}
+		} else {
+			if ($level > 0) {
+				// Reset the array to what we had earlier since we didn't find any sorting information
+				$configArray = $currentConfigArray;
+			}
+		}
+
+		return [$configArray, $configComplete];
+	}
+
+	/**
 	 * Look for media files and folders in the given folder
 	 *
 	 * @param Folder $folder