<?php

	require_once MODULES_PATH.'/in-news/units/rss/lastrss.php';
	
	class RssTagProcessor extends kDBTagProcessor  {
	
		/**
		 * Get's rss file from URL specified in config. Parses it & shows using block name specified
		 * limit param sets showed news limit.
		 *
		 * @param Array $params
		 * @return string
		 */
		function ListFeed($params)
		{
			$rss = new lastRSS();
			
			$ret = '';
			// process each news channel
			$rss->cache_dir = realpath(KERNEL_PATH.'/../cache');
			$rss->cache_time = 3600;
			
			$block_params = $this->prepareTagParams($params);
			$block_params['name'] = $this->SelectParam($params,'render_as,name');
			
			$records_processed = 0;
			if( $rs = $rss->get($params['feed_url']) )
			{
				$records_limit = getArrayValue($params,'limit');
				if($records_limit === false || $records_limit == -1) $records_limit = count($rs['items']);
				foreach($rs['items'] as $news_item) // process each news in each channel
				{
					$block_params = array_merge_recursive2($block_params, $news_item);
					$ret .= $this->Application->ParseBlock($block_params);
					$records_processed++;
					if($records_processed == $records_limit) break;
				}
			}
			return $ret;
		}
		
		/**
		 * Returns passed value cut to chars specified
		 *
		 * @param Array $params
		 * @return string
		 */
		function CutValue($params)
		{
			$ret = $params['value'];
			$cut_first = getArrayValue($params, 'cut_first');
			if($cut_first && strlen($ret) > $cut_first)
			{
				$ret = substr($ret, 0, $cut_first).' ...';
			}
			return $ret;
		}
		
		/**
		 * Checks if no other items available for showing, then show rss file with @rss_ListFeed tag
		 *
		 * @param Array $params
		 * @return bool
		 */
		function IsAllowed($params)
		{
			$ret = true;
			$module_prefixes = explode(',', $params['prefixes']);
			foreach($module_prefixes as $prefix)
			{
				$ret = $ret && $this->Application->GetVar($prefix.'_HasRecords');
			}
			return !$ret;
		}
	
	}

?>