<?php
/**
 * @brief		Rss Widget
 * @author		<a href='http://www.invisionpower.com'>Invision Power Services, Inc.</a>
 * @copyright	(c) 2001 - 2016 Invision Power Services, Inc.
 * @license		http://www.invisionpower.com/legal/standards/
 * @package		IPS Community Suite
 * @subpackage	Content
 * @since		10 Dec 2014
 * @version		SVN_VERSION_NUMBER
 */

namespace IPS\cms\widgets;

/* To prevent PHP errors (extending class does not exist) revealing path */
if ( !defined( '\IPS\SUITE_UNIQUE_KEY' ) )
{
	header( ( isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0' ) . ' 403 Forbidden' );
	exit;
}

/**
 * Rss Widget
 */
class _Rss extends \IPS\Widget\StaticCache
{
	/**
	 * @brief	Widget Key
	 */
	public $key = 'Rss';
	
	/**
	 * @brief	App
	 */
	public $app = 'cms';
		
	/**
	 * @brief	Plugin
	 */
	public $plugin = '';
	
	/**
	 * Initialise this widget
	 *
	 * @return void
	 */ 
	public function init()
	{
		parent::init();
		// Use this to perform any set up and to assign a template that is not in the following format:
		// $this->template( array( \IPS\Theme::i()->getTemplate( 'widgets', $this->app, 'front' ), $this->key ) );
	}
	
	/**
	 * Specify widget configuration
	 *
	 * @param	null|\IPS\Helpers\Form	$form	Form object
	 * @return	null|\IPS\Helpers\Form
	 */
	public function configuration( &$form=null )
	{
 		if ( $form === null )
		{
	 		$form = new \IPS\Helpers\Form;
 		}

		$form->add( new \IPS\Helpers\Form\Text( 'block_rss_import_title', ( isset( $this->configuration['block_rss_import_title'] ) ? $this->configuration['block_rss_import_title'] : NULL ), TRUE ) );
		$form->add( new \IPS\Helpers\Form\Url( 'block_rss_import_url', ( isset( $this->configuration['block_rss_import_url'] ) ? $this->configuration['block_rss_import_url'] : NULL ), TRUE ) );
		$form->add( new \IPS\Helpers\Form\Number( 'block_rss_import_number', ( isset( $this->configuration['block_rss_import_number'] ) ? $this->configuration['block_rss_import_number'] : 5 ), TRUE ) );
		$form->add( new \IPS\Helpers\Form\Number( 'block_rss_import_cache', ( isset( $this->configuration['block_rss_import_cache'] ) ? $this->configuration['block_rss_import_cache'] : 30 ), TRUE, array(), NULL, NULL, \IPS\Member::loggedIn()->language()->addToStack('block_rss_import_cache_suffix') ) );

		return $form;
	}
 	
 	 /**
 	 * Ran before saving widget configuration
 	 *
 	 * @param	array	$values	Values from form
 	 * @return	array
 	 */
 	public function preConfig( $values )
 	{
 		$values['block_rss_import_url'] = (string) $values['block_rss_import_url'];

	    return $values;
 	}

	/**
	 * Render a widget
	 *
	 * @return	string
	 */
	public function render()
	{
		if ( ! isset( $this->configuration['block_rss_import_url'] ) )
		{
			return '';
		}

		$key = "cms_rss_import_" . md5( json_encode( $this->configuration ) );

		if ( isset( \IPS\Data\Store::i()->$key ) )
		{
			$cache = \IPS\Data\Store::i()->$key;

			if ( isset( $cache['time'] ) and isset( $cache['items'] ) and $cache['time'] > ( time() - ( $this->configuration['block_rss_import_cache'] * 60 ) ) )
			{
				return $this->output( $cache['items'], $this->configuration['block_rss_import_title'] );
			}
		}

		/* Still here? Best grab the data then */
		try
		{
			$request = \IPS\Http\Url::external( $this->configuration['block_rss_import_url'] )->request()->get();

			$i = 0;
			$items = array();
			foreach ( $request->decodeXml()->articles() as $guid => $article )
			{
				if ( isset( $article['title'] ) and isset( $article['link'] ) )
				{
					$items[ $guid ] = array(
						'title'   => $article['title'],
						'content' => \IPS\Text\Parser::parseStatic( $article['content'] ),
					    'link'    => (string) $article['link'],
					    'date'    => ( $article['date'] instanceof \IPS\DateTime ) ? $article['date']->getTimestamp() : $article['date']
					);
				}

				$i++;

				if ( $i >= $this->configuration['block_rss_import_number'] )
				{
					break;
				}
			}
		}
		catch( \Exception $e )
		{
			$items = array();
		}

		\IPS\Data\Store::i()->$key = array( 'time' => time(), 'items' => $items );

		return $this->output( $items, $this->configuration['block_rss_import_title'] );
	}
}