Modification of community store plugin SwagCustomCategories to allow more then one condition

SwagCustomCategories.php

<?php
/**
 * Plugin-Controller to display the special article-groups in the frontend
 *
 * @link http://www.shopware.de
 * @copyright Copyright (c) 2011, shopware AG
 * @author Patrick Stahl
 * @package Plugins
 * @subpackage Frontend_Controller
 */
class Shopware_Controllers_Frontend_SwagCustomCategories extends Enlight_Controller_Action
{

	protected $_debug = false;
	protected $_maxArticles = 12;
    /**
     * Adds the default template directory 'Views' to use the new templates
     * @return void
     */
    public function init()
    {
	    if ($this->_debug == false){
		    $this->View()->addTemplateDir(dirname(__FILE__) . "../../Views/");
		    $this->_maxArticles = Shopware()->Plugins()->Frontend()->SwagCustomCategories()->Config()->maxArticles;
	    }

    }

    /**
     * Function to create the whole listing by the given parameter
     *
     * @return void
     */
    public function indexAction()
    {
	    if (!$this->_debug){
            $this->View()->loadTemplate("frontend/plugins/swag_custom_categories/index.tpl");
	    }else {
		    $this->View()->setTemplate();
	    }
        // Check which articles shall be shown
        switch($this->Request()->filterMode) {
            case 'newest':
                $maxArticles = $this->_maxArticles;

                $sql="SELECT id
                    FROM `s_articles`
                    WHERE IF(DATEDIFF(NOW(), datum)<=60,1,0)>0
                    ORDER BY datum DESC";
                $results = Shopware()->Db()->fetchCol($sql, array());
                $articles = array();

                foreach($results as $result) {
                    $article = Shopware()->Modules()->Articles()->sGetPromotionById('fix', 0, $result);
                    if(!empty($article)) {
                        $articles[] = $article;
                    }
                    if(count($articles) == $maxArticles) {
                        break;
                    }
                }

                $this->View()->sArticles = $articles;
                break;

            case 'pseudo':
                $maxArticles = $this->_maxArticles;

                $sql = "SELECT articleID
                        FROM s_articles_prices
                        WHERE pseudoprice > 0
                        GROUP BY articleID
                        ORDER BY id DESC";
                $results = Shopware()->Db()->fetchCol($sql);
                $articles = array();

                foreach($results as $result) {
                    $article = Shopware()->Modules()->Articles()->sGetPromotionById('fix', 0, $result);
                    if(!empty($article)) {
                        $articles[] = $article;
                    }
                    if(count($articles) == $maxArticles) {
                        break;
                    }
                }

                $this->View()->sArticles = $articles;

                break;

            default:
                $maxArticles = $this->_maxArticles;

                $attr = $this->Request()->filterMode;

                if(strpos($attr, "attr") !== false) {


	                $attr = explode("|",$attr);
					$content = explode("|",$this->Request()->content);

	                $sqlAdd = "";
	                foreach ($attr as $attributKey => $attributKV){

		                $attributKV = Shopware()->Db()->quoteIdentifier($attributKV);

		                if (!empty($content[$attributKey])){
							$condition = "
							\nNULLIF({$attributKV},'') IS NOT NULL
							\nAND {$attributKV} = ".Shopware()->Db()->quote($content[$attributKey]);
		                }else {
			                $condition = "
			                \nNULLIF({$attributKV},'') IS NOT NULL
			                \nAND {$attributKV} <> '0'";
		                }

		                $sqlAdd[] = $condition;
	                }

                    $sql="SELECT articleID  FROM `s_articles_attributes` WHERE ".implode($sqlAdd," AND ")."  ORDER BY id DESC    ";

                    $results = Shopware()->Db()->fetchCol($sql, array());
                    $articles = array();

                    foreach($results as $result) {
                        $article = Shopware()->Modules()->Articles()->sGetPromotionById('fix', 0, $result);
                        if(!empty($article)) {
                            $articles[] = $article;
                        }
                        if(count($articles) == $maxArticles) {
                            break;
                        }
                    }
                }

                $this->View()->sArticles = $articles;

                break;
        }
	    if ($this->_debug){
		    print_r($articles);exit;
	    }
    }
}