Magento Admin :: Remove Menu item for specific Roles/Users

Question

I want to remove a menu item from the adminmenu for a specific user role. I've seen others do it by creating a dummy override but these are not based on roles. I want to do this without using one of the .xml files. Is there a way to do this in, for example; the __construct() or prepareLayout?

EDIT: I must add to this that the part I want to disable is the Manage Hierarchy item in CMS. I know I can just disable the Hierarchy for the userrole but I need it to save CMS pages.

Answer 1

I extendend the Mage_Adminhtml_Block_Page_Menu with my own block. I copied the function "_buildMenuArray()" And just before I return the menu array I check if the current loggen in user is not the admin. If so; I remove the Hierarchy item from the menu and set the Page item with value last so the drop-shadow is displayed properly.

class Xxxxx_Xxxx_Block_Adminhtml_Page_Menu extends Mage_Adminhtml_Block_Page_Menu
{
    protected function _buildMenuArray(Varien_Simplexml_Element $parent=null, $path='', $level=0)
    {
        if (is_null($parent)) {
            $parent = Mage::getSingleton('admin/config')->getAdminhtmlConfig()->getNode('menu');
        }

        $parentArr = array();
        $sortOrder = 0;
        foreach ($parent->children() as $childName => $child) {
            if (1 == $child->disabled) {
                continue;
            }

            $aclResource = 'admin/' . ($child->resource ? (string)$child->resource : $path . $childName);
            if (!$this->_checkAcl($aclResource)) {
                continue;
            }

            if ($child->depends && !$this->_checkDepends($child->depends)) {
                continue;
            }

            $menuArr = array();

            $menuArr['label'] = $this->_getHelperValue($child);

            $menuArr['sort_order'] = $child->sort_order ? (int)$child->sort_order : $sortOrder;

            if ($child->action) {
                $menuArr['url'] = $this->_url->getUrl((string)$child->action, array('_cache_secret_key' => true));
            } else {
                $menuArr['url'] = '#';
                $menuArr['click'] = 'return false';
            }

            $menuArr['active'] = ($this->getActive()==$path.$childName)
                || (strpos($this->getActive(), $path.$childName.'/')===0);

            $menuArr['level'] = $level;

            if ($child->children) {
                $menuArr['children'] = $this->_buildMenuArray($child->children, $path.$childName.'/', $level+1);
            }
            $parentArr[$childName] = $menuArr;

            $sortOrder++;
        }

        uasort($parentArr, array($this, '_sortMenu'));

        while (list($key, $value) = each($parentArr)) {
            $last = $key;
        }
        if (isset($last)) {
            $parentArr[$last]['last'] = true;
        }

        $data = $this->_isAdmin($parentArr);

        return $data;
    }

    protected function _isAdmin($data){
        $userRole = Mage::getSingleton('admin/session')->getUser()->getRole();
        $roleName = $userRole->getRoleName();
        $roleId = $userRole->getRoleId();
        if ($roleName == 'Administrators' || $roleId == 1) {
            return $data;
        } else {
            if (isset($data['hierarchy'])){
                unset($data['hierarchy']);
                $data['page']['last'] = 1;  
            }
            if (isset($data['enterprise_page']['children']['hierarchy'])){
                unset($data['enterprise_page']['children']['hierarchy']);
                $data['enterprise_page']['children']['last'] = 1;
            }
            return $data;
        }
    }
}