<?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/>.
* 
*/

OC_Hook::connect(OC_Filesystem::CLASSNAME, OC_Filesystem::signal_post_write, "OC_Gallery_Hooks_Handlers", "addPhotoFromPath");
OC_Hook::connect(OC_Filesystem::CLASSNAME, OC_Filesystem::signal_delete, "OC_Gallery_Hooks_Handlers", "removePhoto");
OC_Hook::connect(OC_Filesystem::CLASSNAME, OC_Filesystem::signal_post_rename, "OC_Gallery_Hooks_Handlers", "renamePhoto");

require_once(OC::$CLASSPATH['OC_Gallery_Album']);
require_once(OC::$CLASSPATH['OC_Gallery_Photo']);

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) {
    $dirhandle = opendir(OC::$CONFIG_DATADIRECTORY.$dirpath);
    if ($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';

    OC_Log::write(self::$APP_TAG, 'Creating new album '.$new_album_name, OC_Log::DEBUG);
    OC_Gallery_Album::create(OC_User::getUser(), $new_album_name, $path);

    return OC_Gallery_Album::find(OC_User::getUser(), null, $path);
  }

  public static function pathInRoot($path) {
    $root = OC_Preferences::getValue(OC_User::getUser(), 'gallery', 'root', '/');
    return substr($path, 0, strlen($path)>strlen($root)?strlen($root):strlen($path)) == $root;
  }

  public static function addPhotoFromPath($params) {
    $fullpath = $params[OC_Filesystem::signal_param_path];

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

    $path = substr($fullpath, 0, strrpos($fullpath, '/'));
    if (!self::pathInRoot($path)) return;
    OC_Gallery_Scanner::scanDir($path, $albums);

  }

  public static function removePhoto($params) {
    $path = $params[OC_Filesystem::signal_param_path];
    if (OC_Filesystem::is_dir($path) && self::directoryContainsPhotos($path)) {
      if(!self::pathInRoot($path)) return;
      OC_Gallery_Album::removeByPath($path.'/', OC_User::getUser());
    } elseif (self::isPhoto($path)) {
      OC_Gallery_Photo::removeByPath($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, $newpath, OC_User::getUser());
    } elseif (!self::isPhoto($newpath)) {
      $olddir = substr($oldpath, 0, strrpos($oldpath, '/'));
      $newdir = substr($newpath, 0, strrpos($newpath, '/'));
      if ($olddir == '') $olddir = '/';
      if ($newdir == '') $newdir = '/';
      if (!self::isPhoto($newpath)) return;
      OC_Log::write(self::$APP_TAG, 'Moving photo from '.$oldpath.' to '.$newpath, OC_Log::DEBUG);
      $album;
      $newAlbumId;
      $oldAlbumId;
      if ($olddir == $newdir) {
        // album changing is not needed
        $album = OC_Gallery_Album::find(OC_User::getUser(), null, $olddir);
        if ($album->numRows() == 0) {
          $album = self::createAlbum($newdir);
        }
        $album = $album->fetchRow();
        $newAlbumId = $oldAlbumId = $album['album_id'];
      } else {
        $newalbum = OC_Gallery_Album::find(OC_User::getUser(), null, $newdir);
        $oldalbum = OC_Gallery_Album::find(OC_User::getUser(), null, $olddir);

        if ($newalbum->numRows() == 0) {
          $newalbum = self::createAlbum($newdir);
        }
        $newalbum = $newalbum->fetchRow();
        if ($oldalbum->numRows() == 0) {
          OC_Gallery_Photo::create($newalbum['album_id'], $newpath);
          return;
        }
        $oldalbum = $oldalbum->fetchRow();
        $newAlbumId = $newalbum['album_id'];
        $oldAlbumId = $oldalbum['album_id'];

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

?>