<?php
  /**
   * Copyright (c) 2012 Robin Appelman <icewind@owncloud.com>
   * This file is licensed under the Affero General Public License version 3 or
   * later.
   * See the COPYING-README file.
   */
  
  namespace OCA\Gallery;
  
  use OC\Files\Filesystem;
  use OC\Files\View;
  
  class Thumbnail {

  	protected $image;
  	protected $path;
  	protected $user;
  	protected $useOriginal = false;
  
  	/**
  	 * @var \OC\Files\View $view
  	 */
  	protected $view;
  
  	public function __construct($imagePath, $user = null, $square = false) {
  		if (!Filesystem::isValidPath($imagePath)) {
  			return;
  		}
  		if (is_null($user)) {
  			$this->view = Filesystem::getView();
  			$this->user = \OCP\User::getUser();
  		} else {
  			$this->view = new View('/' . $user . '/files');
  			$this->user = $user;
  		}
  		$this->useOriginal = (substr($imagePath, -4) === '.svg' or substr($imagePath, -5) === '.svgz');
  		if ($this->useOriginal) {
  			$this->path = $imagePath;
  		} else {
  			$galleryDir = \OC_User::getHome($this->user) . '/gallery/' . $this->user . '/';
  			if (strrpos($imagePath, '.')) {
  				$extension = substr($imagePath, strrpos($imagePath, '.') + 1);
  				$image = substr($imagePath, 0, strrpos($imagePath, '.'));
  			} else {
  				$extension = '';
  				$image = $imagePath;
  			}
  			if ($square) {
  				$extension = 'square.' . $extension;
  			}
  			$this->path = $galleryDir . $image . '.' . $extension;
  			if (!file_exists($this->path)) {
  				$this->create($imagePath, $square);
  			}
  		}
  	}
  
  	private function create($imagePath, $square) {
  		$galleryDir = \OC_User::getHome($this->user) . '/gallery/' . $this->user . '/';
  		$dir = dirname($imagePath);

  		$fileInfo = $this->view->getFileInfo($imagePath);
  		if (!$fileInfo) {
  			return false;

  		}
  		if (!is_dir($galleryDir . $dir)) {
  			mkdir($galleryDir . $dir, 0755, true);
  		}

  
  		$this->image = new \OCP\Image();
  		// check if file is encrypted
  		if ($fileInfo['encrypted'] === true) {
  			$fileName = $this->view->toTmpFile($imagePath);
  		} else {
  			$fileName = $this->view->getLocalFile($imagePath);
  		}
  		$this->image->loadFromFile($fileName);

  		if ($this->image->valid()) {
  			$this->image->fixOrientation();
  			if ($square) {
  				$this->image->centerCrop(200);
  			} else {

  				$this->image->fitIn($this->image->width(), 200);
  				if ($this->image->width() > 600) { // max aspect ratio of 3
  					$this->image->crop(($this->image->width() - 600) / 2, 0, 600, 200);
  				}

  			}
  			$this->image->save($this->path);
  		}
  	}
  
  	public function get() {
  		if (is_null($this->image)) {
  			$this->image = new \OCP\Image($this->path);
  		}
  		return $this->image;
  	}
  
  	public function show() {
  		if ($this->useOriginal) {
  			$fp = @$this->view->fopen($this->path, 'rb');
  			$mtime = $this->view->filemtime($this->path);
  			$size = $this->view->filesize($this->path);
  			$mime = $this->view->getMimetype($this->path);
  		} else {
  			$fp = @fopen($this->path, 'rb');
  			$mtime = filemtime($this->path);
  			$size = filesize($this->path);
  			$mime = \OC_Helper::getMimetype($this->path);
  		}
  		if ($fp) {
  			\OCP\Response::enableCaching();
  			\OCP\Response::setLastModifiedHeader($mtime);
  			header('Content-Length: ' . $size);
  			header('Content-Type: ' . $mime);

  			\OCP\Response::setContentDispositionHeader(basename($this->path), 'attachment');

  
  			fpassthru($fp);
  		} else {
  			\OC_Response::setStatus(\OC_Response::STATUS_NOT_FOUND);
  		}
  	}
  
  	static public function removeHook($params) {
  		$path = $params['path'];

  		$user = \OCP\User::getUser();

  		$galleryDir = \OC_User::getHome($user) . '/gallery/';
  		$thumbPath = $galleryDir . $path;
  		if (is_dir($thumbPath)) {
  			if (file_exists($thumbPath . '.png')) {
  				unlink($thumbPath . '.png');
  			}
  		} else {
  			if (file_exists($thumbPath)) {
  				unlink($thumbPath);
  			}
  
  			if (strrpos($path, '.')) {
  				$extension = substr($path, strrpos($path, '.') + 1);
  				$image = substr($path, 0, strrpos($path, '.'));
  			} else {
  				$extension = '';
  				$image = $path;
  			}
  			$squareThumbPath = $galleryDir . $image . '.square.' . $extension;
  			if (file_exists($squareThumbPath)) {
  				unlink($squareThumbPath);
  			}
  		}
  
  		$parent = dirname($path);
  		if ($parent !== DIRECTORY_SEPARATOR and $parent !== '' and $parent !== $path) {
  			self::removeHook(array('path' => $parent));
  		}
  	}
  
  	static public function writeHook($params) {
  		self::removeHook($params);

  	}
  }