Category Page Product Filter

Question

I am new to prestashop and I am trying to create a simple product filter to be displayed on the category page. I managed to output my filter on the page using the hook for the hookDisplayLeftColumn method, however I have a few questions. Right now I am hooking to the leftColumn but the filter will show on any page that has it.I want to show it only on the category page.

public function hookDisplayLeftColumn($params)
    {

        $data = array(
            'bar' => 'foo'
        );

        $this->context->smarty->assign($data);
        return $this->display(__FILE__, 'categoryfilter.tpl');
    }

And this is the tricky part.How do I filter the products. Is there any method I can hook to and filter the results?

Answer 1

If you want to only include your code in category pages use something like:

public function hookDisplayLeftColumn($params)
{
    if (!isset($this->context->controller->php_self) or $this->context->controller->php_self != 'category')
         return false;

     $data = array(
         'bar' => 'foo'
     );

     $this->context->smarty->assign($data);
     return $this->display(__FILE__, 'categoryfilter.tpl');
}