====== Фильтр производителей ======

<code php><?php

defined('HOSTCMS') || exit('HostCMS: access denied.');

/**
* v. 1.2
* для HostCMS v.6x 
* @author KAD
* http://www.artemkuts.ru/
* artem.kuts@gmail.com
*/

/*
* В ТДС перед вызовом show()
* Kad_Shop_Producer_Filter::instance()->execute($Shop_Controller_Show);
*
* В xsl для флажков

	<!-- Шаблон для фильтра производителей ФЛАЖКИ-->
	<xsl:template match="producers/shop_producer">
	    
	    <xsl:variable name="id" select="@id"/>
	    <input type="checkbox" name="producer[]" value="{@id}" id="producer_{@id}">
	        
	        <xsl:if test="/shop/filters/used/producers[producer=$id]/node()">
	            <xsl:attribute name="checked">checked</xsl:attribute>
	        </xsl:if>
	        
	    </input>
	<label for="producer_{@id}"><a href="javascript:void(0)" onclick=" $('[id^=producer_]').prop('checked', false); $('#producer_{@id}').prop('checked', true);$('#producer_{@id}').closest('form').submit();"><xsl:value-of select="name"/></a></label>
	
	</xsl:template>
	
* В xsl для списка 

	<!-- Шаблон для фильтра производителей СПИСОК-->
	<xsl:template match="producers/shop_producer">
	    
	    <xsl:variable name="id" select="@id"/>
	    <option value="{@id}">
	        
	        <xsl:if test="/shop/filters/used/producers[producer=$id]/node()">
	            <xsl:attribute name="selected">selected</xsl:attribute>
	        </xsl:if>
	        <xsl:value-of select="name"/>
	    </option>	
	</xsl:template>
	
* Вызов в шаблоне

	<select name="producer">
	    <option>...</option>
	    <xsl:apply-templates select="/shop/producers/shop_producer"/>
	</select>

* Далее заменяем код переменной filter
	
<!-- Передаем фильтр -->
<xsl:variable name="filter"><xsl:if test="/shop/filter/node()">?filter=1&amp;sorting=<xsl:value-of select="/shop/sorting"/>&amp;price_from=<xsl:value-of select="/shop/price_from"/>&amp;price_to=<xsl:value-of select="/shop/price_to"/><xsl:for-each select="/shop/*"><xsl:if test="starts-with(name(), 'property_')">&amp;<xsl:value-of select="name()"/>=<xsl:value-of select="."/></xsl:if></xsl:for-each></xsl:if><xsl:if test="/shop/filters/used/producers/node()"><xsl:for-each select="/shop/filters/used/producers/producer">&amp;<xsl:value-of select="name()"/>[]=<xsl:value-of select="."/></xsl:for-each></xsl:if></xsl:variable>

*
*/
class Kad_Shop_Producer_Filter
{	

	public $input_name = 'producer';

	/**
	 * The singleton instances.
	 * @var mixed
	 */
	static public $instance = NULL;

	/**
	 * Register an existing instance as a singleton.
	 * @return object
	 */
	static public function instance()
	{
		if (is_null(self::$instance))
		{
			self::$instance = new self();
		}

		return self::$instance;
	}

	public function __construct()
	{

	}

	/*
	* Получаем производителей
	*/
	public function getProducers()
	{
		$aShop_Producers = Kad_Shop_Producer::getAll($this->Shop_Controller_Show->group, true);

		return $aShop_Producers;
	}

	/*
	* Добавляем производителей к xml
	*/
	public function addToXml($aShopProducers, $aActiveProducers)
	{
		$oProducersXmlEntity = Core::factory('Core_Xml_Entity')->name('producers');

		$aShopProducers = $this->getProducers();
		foreach ($aShopProducers as $oShopProducer)
		{
			$oProducersXmlEntity->addEntity(
				$oShopProducer->clearEntities()
			);
		}

		$this->Shop_Controller_Show->addEntity($oProducersXmlEntity);

		if ($aActiveProducers)
		{
			$xmlFilters = Core::factory('Core_Xml_Entity')->name('filters');
			$xmlUsed = Core::factory('Core_Xml_Entity')->name('used');
			$oActiveProducersXmlEntity = Core::factory('Core_Xml_Entity')->name('producers');

			foreach ($aActiveProducers as $ActiveProducer)
			{
				$oProducerXml = Core::factory('Core_Xml_Entity')->name($this->input_name)->value($ActiveProducer);
				$oActiveProducersXmlEntity->addEntity($oProducerXml);
			}

			$this->Shop_Controller_Show->addEntity($xmlFilters->addEntity($xmlUsed->addEntity($oActiveProducersXmlEntity)));
		}

		return true;
	}

	/*
	* Фильтр по производителям
	*/
	public function filterProducers($aProducers = array())
	{	

		$this->Shop_Controller_Show->shopItems()
			->queryBuilder()
			->where('shop_items.shop_producer_id', 'IN', $aProducers);

		$this->Shop_Controller_Show->addCacheSignature( 'producer=' . implode(',', $aProducers));
	}

	public function execute($Shop_Controller_Show = Shop_Controller_Show)
	{
		$this->Shop_Controller_Show = $Shop_Controller_Show;

		$aProducers = Core_Array::getGet($this->input_name);

		if ($aProducers && !is_array($aProducers))
		{
			$aProducers = array($aProducers);
		}

		if (count($aProducers))
		{
			$this->filterProducers($aProducers);
		}

		$aShop_Producers = Kad_Shop_Producer::getAll($this->Shop_Controller_Show->group);
		$this->addToXml($aShop_Producers, $aProducers);

	}
}
</code>