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<?php
/**
* @package FrameworkOnFramework
* @subpackage hal
* @copyright Copyright (C) 2010 - 2015 Nicholas K. Dionysopoulos / Akeeba Ltd. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
defined('FOF_INCLUDED') or die;
/**
* Implementation of the Hypertext Application Language link in PHP.
*
* @package FrameworkOnFramework
* @since 2.1
*/
class FOFHalLink
{
/**
* For indicating the target URI. Corresponds with the ’Target IRI’ as
* defined in Web Linking (RFC 5988). This attribute MAY contain a URI
* Template (RFC6570) and in which case, SHOULD be complemented by an
* additional templated attribtue on the link with a boolean value true.
*
* @var string
*/
protected $_href = '';
/**
* This attribute SHOULD be present with a boolean value of true when the
* href of the link contains a URI Template (RFC6570).
*
* @var boolean
*/
protected $_templated = false;
/**
* For distinguishing between Resource and Link elements that share the
* same relation
*
* @var string
*/
protected $_name = null;
/**
* For indicating what the language of the result of dereferencing the link should be.
*
* @var string
*/
protected $_hreflang = null;
/**
* For labeling the destination of a link with a human-readable identifier.
*
* @var string
*/
protected $_title = null;
/**
* Public constructor of a FOFHalLink object
*
* @param string $href See $this->_href
* @param boolean $templated See $this->_templated
* @param string $name See $this->_name
* @param string $hreflang See $this->_hreflang
* @param string $title See $this->_title
*
* @throws RuntimeException If $href is empty
*/
public function __construct($href, $templated = false, $name = null, $hreflang = null, $title = null)
{
if (empty($href))
{
throw new RuntimeException('A HAL link must always have a non-empty href');
}
$this->_href = $href;
$this->_templated = $templated;
$this->_name = $name;
$this->_hreflang = $hreflang;
$this->_title = $title;
}
/**
* Is this a valid link? Checks the existence of required fields, not their
* values.
*
* @return boolean
*/
public function check()
{
return !empty($this->_href);
}
/**
* Magic getter for the protected properties
*
* @param string $name The name of the property to retrieve, sans the underscore
*
* @return mixed Null will always be returned if the property doesn't exist
*/
public function __get($name)
{
$property = '_' . $name;
if (property_exists($this, $property))
{
return $this->$property;
}
else
{
return null;
}
}
/**
* Magic setter for the protected properties
*
* @param string $name The name of the property to set, sans the underscore
* @param mixed $value The value of the property to set
*
* @return void
*/
public function __set($name, $value)
{
if (($name == 'href') && empty($value))
{
return;
}
$property = '_' . $name;
if (property_exists($this, $property))
{
$this->$property = $value;
}
}
}