I've had to re-write a block of a third party module, I only want to re-write one function in the class but my re-write won't work unless I copy across the private functions from the class I extended.
I read this answer from Alan Storm on stack overflow and read that if your class extends another class, it will not have access to private properties of the base class/object.
That's ok, but what is the best practice for class re-writes if the base class had pricate functions? Should I just add them to my class. What about protected properties?
Here is my class if it helps.
class Creed_CustomMenu_Block_Navigation extends WP_CustomMenu_Block_Navigation
{
const CUSTOM_BLOCK_TEMPLATE = "wp_custom_menu_%d";
private $_productsCount = null;
public function showHomeLink()
{
return Mage::getStoreConfig('custom_menu/general/show_home_link');
}
public function drawCustomMenuItem($category, $level = 0, $last = false)
{
if (!$category->getIsActive()) return '';
$html = array();
$id = $category->getId();
// --- Static Block ---
$blockId = sprintf(self::CUSTOM_BLOCK_TEMPLATE, $id); // --- static block key
#Mage::log($blockId);
$collection = Mage::getModel('cms/block')->getCollection()
->addFieldToFilter('identifier', array('like' => $blockId . '%'))
->addFieldToFilter('is_active', 1);
$blockId = $collection->getFirstItem()->getIdentifier();
#Mage::log($blockId);
$blockHtml = $this->getLayout()->createBlock('cms/block')->setBlockId($blockId)->toHtml();
// --- Sub Categories ---
$activeChildren = $this->_getActiveChildren($category, $level);
// --- class for active category ---
$active = ''; if ($this->isCategoryActive($category)) $active = ' act';
// --- Popup functions for show ---
// $wideBlock; // = false; // MC: added new condition for setting extra wide static blocks
global $wideBlock;
$wideBlock = false;
if (strpos($blockId,'wide') !== false) {
$wideBlock = true;
}
$drawPopup = ($blockHtml || count($activeChildren));
if ($drawPopup) {
$html[] = '<div id="menu' . $id . '" class="menu' . $active . '" onmouseover="wpShowMenuPopup(this, event, \'popup' . $id . '\');" onmouseout="wpHideMenuPopup(this, event, \'popup' . $id . '\', \'menu' . $id . '\')">';
} else {
$html[] = '<div id="menu' . $id . '" class="menu' . $active . '">';
}
// --- Top Menu Item ---
$html[] = '<div class="parentMenu">';
if ($level == 0 && $drawPopup) {
$html[] = '<a href="javascript:void(0);" rel="'.$this->getCategoryUrl($category).'">';
} else {
$html[] = '<a href="'.$this->getCategoryUrl($category).'">';
}
$name = $this->escapeHtml($category->getName());
if (Mage::getStoreConfig('custom_menu/general/non_breaking_space')) {
$name = str_replace(' ', ' ', $name);
}
$html[] = '<span>' . $name . '</span>';
$html[] = '</a>';
$html[] = '</div>';
$html[] = '</div>';
// --- Add Popup block (hidden) ---
if ($drawPopup) {
// --- Popup function for hide ---
$html[] = '<div id="popup' . $id . '" class="wp-custom-menu-popup" onmouseout="wpHideMenuPopup(this, event, \'popup' . $id . '\', \'menu' . $id . '\')" onmouseover="wpPopupOver(this, event, \'popup' . $id . '\', \'menu' . $id . '\')">';
// --- draw Sub Categories ---
if ($blockHtml)
{
if (count($activeChildren))
{
if ($wideBlock) {
$html[] = '<div class="block1 grid12-2 mega-menu-list">';
$html[] = '<h3 class="title cat-browse">' . Mage::helper('catalog')->__('Browse by category') . '</h3>' ;
$html[] = $this->drawWithoutColumns($activeChildren);
} else{
$html[] = '<div class="block1 grid12-7">';
$html[] = $this->drawColumns($activeChildren);
}
$html[] = '<div class="clearBoth"></div>';
$html[] = '</div>';
}
// --- draw Custom User Block ---
if ($wideBlock) {
$html[] = '<div id="' . $blockId . '" class="block2 grid12-10">';
} else{
$html[] = '<div id="' . $blockId . '" class="block2 grid12-5">';
}
$html[] = $blockHtml;
$html[] = '</div>';
}
else
if (count($activeChildren)) {
$html[] = '<div class="block1 grid-full">';
$html[] = $this->drawColumns($activeChildren);
$html[] = '<div class="clearBoth"></div>';
$html[] = '</div>';
}
$html[] = '</div>';
}
$html = implode("\n", $html);
return $html;
}
public function drawWithoutColumns($children)
{
$html = '';
// --- explode by columns ---
$columns = 0;
if ($columns < 1) $columns = 1;
$chunks = $this->_explodeByColumns($children, $columns);
// --- draw columns ---
$lastColumnNumber = count($chunks);
$i = 1;
foreach ($chunks as $key => $value)
{
if (!count($value)) continue;
$class = '';
if ($i == 1) $class.= ' first';
if ($i == $lastColumnNumber) $class.= ' last';
if ($i % 2) $class.= ' odd'; else $class.= ' even';
$html.= '<div class="column' . $class . '">';
$html.= $this->drawMenuItem($value, 1);
$html.= '</div>';
$i++;
}
return $html;
}
protected function _getActiveChildren($parent, $level)
{
$activeChildren = array();
// --- check level ---
$maxLevel = (int)Mage::getStoreConfig('custom_menu/general/max_level');
if ($maxLevel > 0)
{
if ($level >= ($maxLevel - 1)) return $activeChildren;
}
// --- / check level ---
if (Mage::helper('catalog/category_flat')->isEnabled())
{
$children = $parent->getChildrenNodes();
$childrenCount = count($children);
}
else
{
$children = $parent->getChildren();
$childrenCount = $children->count();
}
$hasChildren = $children && $childrenCount;
if ($hasChildren)
{
foreach ($children as $child)
{
if ($this->_isCategoryDisplayed($child))
{
array_push($activeChildren, $child);
}
}
}
return $activeChildren;
}
private function _isCategoryDisplayed(&$child)
{
if (!$child->getIsActive()) return false;
// === check products count ===
// --- get collection info ---
if (!Mage::getStoreConfig('custom_menu/general/display_empty_categories'))
{
$data = $this->_getProductsCountData();
// --- check by id ---
$id = $child->getId();
#Mage::log($id); Mage::log($data);
if (!isset($data[$id]) || !$data[$id]['product_count']) return false;
}
// === / check products count ===
return true;
}
private function _getProductsCountData()
{
if (is_null($this->_productsCount))
{
$collection = Mage::getModel('catalog/category')->getCollection();
$storeId = Mage::app()->getStore()->getId();
/* @var $collection Mage_Catalog_Model_Resource_Eav_Mysql4_Category_Collection */
$collection->addAttributeToSelect('name')
->addAttributeToSelect('is_active')
->setProductStoreId($storeId)
->setLoadProductCount(true)
->setStoreId($storeId);
$productsCount = array();
foreach($collection as $cat)
{
$productsCount[$cat->getId()] = array(
'name' => $cat->getName(),
'product_count' => $cat->getProductCount(),
);
}
#Mage::log($productsCount);
$this->_productsCount = $productsCount;
}
return $this->_productsCount;
}
[REST OF CODE OMITTED FOR BREVITY]
}
