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<?php
abstract class CategoriesCache implements CacheData
{
protected $categories;
public function synchronize()
{
$categories_cache = self::get_class();
$category_class = $categories_cache->get_category_class();
$root_category = $categories_cache->get_root_category();
$root_category->set_elements_number($categories_cache->get_category_elements_number($root_category->get_id()));
$this->categories[Category::ROOT_CATEGORY] = $root_category;
$result = PersistenceContext::get_querier()->select_rows($categories_cache->get_table_name(), array('*'), 'ORDER BY id_parent, c_order');
while ($row = $result->fetch())
{
$category = new $category_class();
$category->set_properties($row);
$this->categories[$row['id']] = $category;
}
$result->dispose();
foreach ($this->categories as &$category)
{
if (!$category->has_special_authorizations())
$category->set_authorizations($this->categories[$category->get_id_parent()]->get_authorizations());
$category->set_elements_number($categories_cache->get_category_elements_number($category->get_id()));
if ($category->get_id_parent() != Category::ROOT_CATEGORY)
{
$current_category_elements_number = $category->get_elements_number();
$id_parent = $category->get_id_parent();
while ($id_parent != Category::ROOT_CATEGORY)
{
$parent_elements_number = $this->categories[$id_parent]->get_elements_number();
if (is_array($current_category_elements_number))
{
foreach ($current_category_elements_number as $element_id => $elements_number)
{
$parent_elements_number[$element_id] = $parent_elements_number[$element_id] + $elements_number;
}
$this->categories[$id_parent]->set_elements_number($parent_elements_number);
}
else
$this->categories[$id_parent]->set_elements_number((int)$this->categories[$id_parent]->get_elements_number() + (int)$category->get_elements_number());
$id_parent = $this->categories[$id_parent]->get_id_parent();
}
}
}
}
abstract public function get_table_name();
abstract public function get_category_class();
abstract public function get_module_identifier();
abstract public function get_root_category();
protected function get_category_elements_number($id_category)
{
return 0;
}
public function get_categories()
{
return $this->categories;
}
public function get_children($id_category, $allowed_categories_filter = array())
{
$children = array();
foreach ($this->categories as $id => $category)
{
if ($category->get_id_parent() == $id_category && $id != Category::ROOT_CATEGORY)
{
if ((!empty($allowed_categories_filter) && in_array($id, $allowed_categories_filter)) || empty($allowed_categories_filter))
$children[$id] = $category;
}
if (!empty($allowed_categories_filter) && !in_array($id, $allowed_categories_filter))
{
$current_category_elements_number = $category->get_elements_number();
$id_parent = $category->get_id_parent();
while ($id_parent != Category::ROOT_CATEGORY)
{
$parent_elements_number = $this->categories[$id_parent]->get_elements_number();
if (is_array($current_category_elements_number))
{
foreach ($current_category_elements_number as $element_id => $elements_nbr)
{
$parent_elements_number[$element_id] = max(($parent_elements_number[$element_id] - $elements_nbr), 0);
}
$this->categories[$id_parent]->set_elements_number($parent_elements_number);
}
else
{
$this->categories[$id_parent]->set_elements_number(max(($parent_elements_number - $current_category_elements_number), 0));
}
$id_parent = $this->categories[$id_parent]->get_id_parent();
}
}
}
return $children;
}
public function category_exists($id)
{
return array_key_exists($id, $this->categories);
}
public function get_category($id)
{
if ($this->category_exists($id))
{
return $this->categories[$id];
}
throw new CategoryNotFoundException($id);
}
public function has_categories()
{
return count($this->categories) > 1;
}
public static function load()
{
return CacheManager::load(get_called_class(), self::get_class()->get_module_identifier(), 'categories');
}
public static function invalidate()
{
CacheManager::invalidate(self::get_class()->get_module_identifier(), 'categories');
}
public static function get_class()
{
$class_name = get_called_class();
return new $class_name();
}
}
?>