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