/**
* Returns true if the filter should be displayed
* @param Mage_Catalog_Block_Layer_Filter_Abstract $filter
* @param number $categoryId
* @return bool
*/
public function displayFilter(Mage_Catalog_Block_Layer_Filter_Abstract $filter, $categoryId)
{
$inclusionFilterRules = $this->getFilterRules(self::RULES_TYPE_INCLUSION);
$exclusionFilterRules = $this->getFilterRules(self::RULES_TYPE_EXCLUSION);
$display = true;
/** @var Mage_Catalog_Model_Resource_Eav_Attribute $attribute */
$attribute = $filter->getAttributeModel();
if (!$attribute) {
return $display;
}
$code = $attribute->getAttributeCode();
// if there is a rule for this code, validate
if (isset($inclusionFilterRules[$code])) {
$display = false;
$rules = $inclusionFilterRules[$code];
foreach ($rules as $rule) {
// if there is not a value for the rule, then there is nothing to validate against and it has passed
// if there is a value, then check that they match
$ruleCategoryId = !$rule['category_id'] ? true : $rule['category_id'] == $categoryId;
if ($ruleCategoryId) {
$display = true;
break;
}
}
}
if ($display == true && isset($exclusionFilterRules[$code])) {
$rules = $exclusionFilterRules[$code];
foreach ($rules as $rule) {
if ($rule['category_id'] == $categoryId) {
$display = false;
break;
}
}
}
return $display;
}
