98 lines
1.8 KiB
PHP
98 lines
1.8 KiB
PHP
<?php
|
|
|
|
namespace PicoFeed;
|
|
|
|
use RuntimeException;
|
|
|
|
/**
|
|
* Base writer class
|
|
*
|
|
* @author Frederic Guillot
|
|
* @package picofeed
|
|
* @property string $description Feed description
|
|
*/
|
|
abstract class Writer
|
|
{
|
|
/**
|
|
* Dom object
|
|
*
|
|
* @access protected
|
|
* @var \DomDocument
|
|
*/
|
|
protected $dom;
|
|
|
|
/**
|
|
* Items
|
|
*
|
|
* @access public
|
|
* @var array
|
|
*/
|
|
public $items = array();
|
|
|
|
/**
|
|
* Author
|
|
*
|
|
* @access public
|
|
* @var array
|
|
*/
|
|
public $author = array();
|
|
|
|
/**
|
|
* Feed URL
|
|
*
|
|
* @access public
|
|
* @var string
|
|
*/
|
|
public $feed_url = '';
|
|
|
|
/**
|
|
* Website URL
|
|
*
|
|
* @access public
|
|
* @var string
|
|
*/
|
|
public $site_url = '';
|
|
|
|
/**
|
|
* Feed title
|
|
*
|
|
* @access public
|
|
* @var string
|
|
*/
|
|
public $title = '';
|
|
|
|
/**
|
|
* Feed modification date (timestamp)
|
|
*
|
|
* @access public
|
|
* @var integer
|
|
*/
|
|
public $updated = 0;
|
|
|
|
/**
|
|
* Generate the XML document
|
|
*
|
|
* @abstract
|
|
* @access public
|
|
* @param string $filename Optional filename
|
|
* @return string
|
|
*/
|
|
abstract public function execute($filename = '');
|
|
|
|
/**
|
|
* Check required properties to generate the output
|
|
*
|
|
* @access public
|
|
* @param array $properties List of properties
|
|
* @param mixed $container Object or array container
|
|
*/
|
|
public function checkRequiredProperties(array $properties, $container)
|
|
{
|
|
foreach ($properties as $property) {
|
|
if ((is_object($container) && ! isset($container->$property)) || (is_array($container) && ! isset($container[$property]))) {
|
|
throw new RuntimeException('Required property missing: '.$property);
|
|
}
|
|
}
|
|
}
|
|
}
|