<?php

/**
* ownCloud - gallery application
*
* @author Bartek Przybylski
* @copyright 2012 Bartek Przybylski bart.p.pl@gmail.com
* 
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either 
* version 3 of the License, or any later version.
* 
* This library 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 Lesser General Public 
* License along with this library.	If not, see <http://www.gnu.org/licenses/>.
* 
*/

OCP\Util::connectHook(OC_Filesystem::CLASSNAME, OC_Filesystem::signal_delete, "OC_Gallery_Hooks_Handlers", "removePhoto");
//OCP\Util::connectHook(OC_Filesystem::CLASSNAME, OC_Filesystem::signal_post_rename, "OC_Gallery_Hooks_Handlers", "renamePhoto");

require_once(OC::$CLASSPATH['Pictures_Managers']);

class OC_Gallery_Hooks_Handlers {
	private static $APP_TAG = "Gallery";

	private static function isPhoto($filename) {
		$ext = strtolower(substr($filename, strrpos($filename, '.')+1));
		return $ext=='png' || $ext=='jpeg' || $ext=='jpg' || $ext=='gif';
	}

	private static function directoryContainsPhotos($dirpath) {
		$dirhandle = OC_Filesystem::opendir($dirpath.'/');
		if ($dirhandle != FALSE) {
			while (($filename = readdir($dirhandle)) != FALSE) {
				if ($filename[0] == '.') continue;
				if (self::isPhoto($dirpath.'/'.$filename)) return true;
			}
		}
		return false;
	}

	private static function createAlbum($path) {
		$new_album_name = trim(str_replace('/', '.', $path), '.');
		if ($new_album_name == '')
			$new_album_name = 'main';

		OCP\Util::writeLog(self::$APP_TAG, 'Creating new album '.$new_album_name, OCP\Util::DEBUG);
		OC_Gallery_Album::create(OCP\USER::getUser(), $new_album_name, $path);

		return OC_Gallery_Album::find(OCP\USER::getUser(), null, $path);
	}

	public static function pathInRoot($path) {
		$root = OCP\Config::getUserValue(OCP\USER::getUser(), 'gallery', 'root', '/');
		return substr($path, 0, strlen($path)>strlen($root)?strlen($root):strlen($path)) == $root;
	}

	public static function addPhotoFromPath($params) {
		$fullpath = $params[OC_Filesystem::signal_param_path];
		$fullpath = rtrim(dirname($fullpath),'/').'/'.basename($fullpath);

		if (!self::isPhoto($fullpath)) return;

		$a = OC_Gallery_Album::find(OCP\USER::getUser(), null, dirname($fullpath));
		if (!($r = $a->fetchRow())) {
			OC_Gallery_Album::create(OCP\USER::getUser(), basename(dirname($fullpath)), dirname($fullpath));
			$a = OC_Gallery_Album::find(OCP\USER::getUser(), null, dirname($fullpath));
			$r = $a->fetchRow();
		}
		$albumId = $r['album_id'];
		$p = OC_Gallery_Album::find($albumId, $fullpath);
		if (!($p->fetchRow()))
			OC_Gallery_Photo::create($albumId, $fullpath);
	}

	public static function removePhoto($params) {
		\OC\Pictures\ThumbnailsManager::getInstance()->delete($params[OC_Filesystem::signal_param_path]);
	}

	public static function renamePhoto($params) {
		$oldpath = $params[OC_Filesystem::signal_param_oldpath];
		$newpath = $params[OC_Filesystem::signal_param_newpath];
		if (OC_Filesystem::is_dir($newpath.'/') && self::directoryContainsPhotos($newpath)) {
			OC_Gallery_Album::changePath($oldpath, $newpath, OCP\USER::getUser());
		} elseif (self::isPhoto($newpath)) {
			$olddir = dirname($oldpath);
			$newdir = dirname($newpath);
			if ($olddir == '') $olddir = '/';
			if ($newdir == '') $newdir = '/';
			if (!self::isPhoto($newpath)) return;
			OCP\Util::writeLog(self::$APP_TAG, 'Moving photo from '.$oldpath.' to '.$newpath, OCP\Util::DEBUG);
			$album;
			$newAlbumId;
			$oldAlbumId;
			if ($olddir == $newdir) {
				// album changing is not needed
				$albums = OC_Gallery_Album::find(OCP\USER::getUser(), null, $olddir);
				$album = $albums->fetchRow();
				if (!$album) {
					$albums = self::createAlbum($newdir);
					$album = $albums->fetchRow();
				}
				$newAlbumId = $oldAlbumId = $album['album_id'];
			} else {
				$newalbum = OC_Gallery_Album::find(OCP\USER::getUser(), null, $newdir);
				$oldalbum = OC_Gallery_Album::find(OCP\USER::getUser(), null, $olddir);

				if (!($newalbum = $newalbum->fetchRow())) {
					$newalbum = self::createAlbum($newdir);
					$newalbum = $newalbum->fetchRow();
				}
				$oldalbum = $oldalbum->fetchRow();
				if (!$oldalbum) {
					OC_Gallery_Photo::create($newalbum['album_id'], $newpath);
					return;
				}
				$newAlbumId = $newalbum['album_id'];
				$oldAlbumId = $oldalbum['album_id'];

			}
			OC_Gallery_Photo::changePath($oldAlbumId, $newAlbumId, $oldpath, $newpath);
		}
	}
}

?>