Transplant a module category specific?

[ejectcore]

Not sure if this one is possible, currently when you transplant a module you can enter exceptions for pages where the module will not appear, this is a really good idea but I want to enhance the positions block by being able to select several categories where this module will appear, in the same way that exceptions works, but the opposite rule, I have started this hack but seem to be struggerling to work out how some of the coding structure works

 

 

added to module.php below line 255

 

/* Module  linked by Categories */

  /* Add categories for module->Hook */	
public function registerCategoiresModule$id_hook, $categoireslinks)
{
	foreach ($categoireslinks AS $categoireslink) {
		if (!empty($categoireslink))
		{
			$result = Db::getInstance()->Execute('
			INSERT INTO `'._DB_PREFIX_.'hook_module_category` (`id_module`, `id_hook`, `id_category`)
			VALUES ('.intval($this->id).', '.intval($id_hook).', ''.strval($categoireslink).'')');
			if (!$result)
				return false;
		}
	}
	return true;
}	

 

added to AdminModulesPositions.php changes marked in bold

 

// Getting vars...

$id_module = intval(Tools::getValue('id_module'));

$module = Module::getInstanceById($id_module);

$id_hook = intval(Tools::getValue('id_hook'));

$hook = new Hook($id_hook);

$excepts = explode(',', str_replace(' ', '', Tools::getValue('exceptions')));

$categoireslinks = explode(',', str_replace(' ', '', Tools::getValue('CategoiresModule')));

 

 

// Checking vars...

foreach ($excepts AS $except)

if (!Validate::isFileName($except))

$this->_errors[] = Tools::displayError('no valid value for field exceptions');

if (!Validate::isFileName($categoireslink))

$this->_errors[] = Tools::displayError('no valid value for field Categories Link');

 

 

<label>'.$this->l('Exceptions').' :</label>

<label>'.$this->l('CategoiresModule').' :</label>

 

Can anyone point out where I am going wrong with this  ???

and yes I have already created the additonal MYSQL table