nextcloud/apps/contacts/thumbnail.php

<?php
/**
 * ownCloud - Addressbook
 *
 * @author Thomas Tanghus
 * @copyright 2011-2012 Thomas Tanghus <thomas@tanghus.net>
 *
 * 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 Affero General Public
 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

// Init owncloud
require_once('../../lib/base.php');
OC_JSON::checkLoggedIn();
//OC_Util::checkLoggedIn();
OC_Util::checkAppEnabled('contacts');

function getStandardImage(){
	$date = new DateTime('now');
	$date->add(new DateInterval('P10D'));
	header('Expires: '.$date->format(DateTime::RFC2822));
	OC_Response::enableCaching();
	OC_Response::redirect(OC_Helper::imagePath('contacts', 'person.png'));
}

if(!function_exists('imagecreatefromjpeg')) {
	OC_Log::write('contacts','thumbnail.php. GD module not installed',OC_Log::DEBUG);
	getStandardImage();
	exit();
}

$id = $_GET['id'];

$contact = OC_Contacts_App::getContactVCard($id);

// invalid vcard
if( is_null($contact)){
	OC_Log::write('contacts','thumbnail.php. The VCard for ID '.$id.' is not RFC compatible',OC_Log::ERROR);
	getStandardImage();
	exit();
}

$thumbnail_size = 23;

// Find the photo from VCard.
$image = new OC_Image();
$photo = $contact->getAsString('PHOTO');

OC_Response::setETagHeader(md5($photo));
OC_Contacts_App::setLastModifiedHeader($contact);

if($image->loadFromBase64($photo)) {
	if($image->centerCrop()) {
		if($image->resize($thumbnail_size)) {
			if($image->show()) {
				exit();
			} else {
				OC_Log::write('contacts','thumbnail.php. Couldn\'t display thumbnail for ID '.$id,OC_Log::ERROR);
			}
		} else {
			OC_Log::write('contacts','thumbnail.php. Couldn\'t resize thumbnail for ID '.$id,OC_Log::ERROR);
		}
	}else{
		OC_Log::write('contacts','thumbnail.php. Couldn\'t crop thumbnail for ID '.$id,OC_Log::ERROR);
	}
} else {
	OC_Log::write('contacts','thumbnail.php. Couldn\'t load image string for ID '.$id,OC_Log::ERROR);
}
getStandardImage();