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<?php
namespace JExtstore\Component\JChat\Administrator\Framework\Thumb;
/**
* @package JCHAT::administrator::components::com_jchat
* @subpackage framework
* @subpackage thumb
* @author Joomla! Extensions Store
* @copyright (C) 2024 - Joomla! Extensions Store
* @license GNU/GPLv2 http://www.gnu.org/licenses/gpl-2.0.html
*/
defined ( '_JEXEC' ) or die ( 'Restricted access' );
use JExtstore\Component\JChat\Administrator\Framework\Thumb\Main as ThumbMain;
// define some useful constants
define('THUMBLIB_BASE_PATH', dirname(__FILE__));
define('THUMBLIB_PLUGIN_PATH', THUMBLIB_BASE_PATH . '/thumb_plugins/');
define('DEFAULT_THUMBLIB_IMPLEMENTATION', 'gd');
/**
* Factory Object
*
* This class is responsible for making sure everything is set up and initialized properly,
* and returning the appropriate thumbnail class instance. It is the only recommended way
* of using this library, and if you try and circumvent it, the sky will fall on your head :)
*
* Basic use is easy enough. First, make sure all the settings meet your needs and environment...
* these are the static variables defined at the beginning of the class.
*
* Once that's all set, usage is pretty easy. You can simply do something like:
* <code>$thumb = \JExtstore\Component\JChat\Administrator\Framework\Thumb\Factory::create('/path/to/file.png');</code>
*
* Refer to the documentation for the create function for more information
*
* @package JCHAT::administrator::components::com_jchat
* @subpackage framework
* @subpackage thumb
*/
class Factory
{
/**
* Which implemenation of the class should be used by default
*
* Currently, valid options are:
* - imagick
* - gd
*
* These are defined in the implementation map variable, inside the create function
*
* @var string
*/
public static $defaultImplemenation = DEFAULT_THUMBLIB_IMPLEMENTATION;
/**
* Where the plugins can be loaded from
*
* Note, it's important that this path is properly defined. It is very likely that you'll
* have to change this, as the assumption here is based on a relative path.
*
* @var string
*/
public static $pluginPath = THUMBLIB_PLUGIN_PATH;
/**
* Factory Function
*
* This function returns the correct thumbnail object, augmented with any appropriate plugins.
* It does so by doing the following:
* - Getting an instance of Main
* - Loading plugins
* - Validating the default implemenation
* - Returning the desired default implementation if possible
* - Returning the GD implemenation if the default isn't available
* - Throwing an exception if no required libraries are present
*
* @return Gd
* @uses Main
* @param string $filename The path and file to load [optional]
*/
public static function create ($filename = null, $options = array(), $isDataStream = false)
{
// map our implementation to their class names
$implementationMap = array
(
'imagick' => '\ImagickThumb',
'gd' => '\JExtstore\Component\JChat\Administrator\Framework\Thumb\Gd'
);
// grab an instance of Main
$pt = ThumbMain::getInstance();
$toReturn = null;
$implementation = self::$defaultImplemenation;
// attempt to load the default implementation
if ($pt->isValidImplementation(self::$defaultImplemenation))
{
$imp = $implementationMap[self::$defaultImplemenation];
$toReturn = new $imp($filename, $options, $isDataStream);
}
// load the gd implementation if default failed
else if ($pt->isValidImplementation('gd'))
{
$imp = $implementationMap['gd'];
$implementation = 'gd';
$toReturn = new $imp($filename, $options, $isDataStream);
}
// throw an exception if we can't load
else
{
throw new \Exception('You must have either the GD or iMagick extension loaded to use this library');
}
return $toReturn;
}
}