drupal hook_menu_alter() for adding tabs - drupal

Question

I want to add some tabs in the "node/%/edit" page from my module called "cssswitch".
When I click "Rebuild Menus", the two new tabs are displayed, but they are displayed for ALL nodes when editing them, not just for the node "cssswitch". I want these new tabs to be displayed only when editing node of type "cssswitch".
The other problem is when I clear all cache, the tabs completely dissapear from all edit pages. Below is the code I wrote.
function cssswitch_menu_alter(&$items) {
$node = menu_get_object();
//print_r($node);
//echo $node->type; //exit();
if ($node->type == 'cssswitch') {
$items['node/%/edit/schedulenew'] = array(
'title' => 'Schedule1',
'access callback'=>'user_access',
'access arguments'=>array('view cssswitch'),
'page callback' => 'cssswitch_schedule',
'page arguments' => array(1),
'type' => MENU_LOCAL_TASK,
'weight'=>4,
);
$items['node/%/edit/schedulenew2'] = array(
'title' => 'Schedule2',
'access callback'=>'user_access',
'access arguments'=>array('view cssswitch'),
'page callback' => 'cssswitch_test2',
'page arguments' => array(1),
'type' => MENU_LOCAL_TASK,
'weight'=>3,
);
}
}
function cssswitch_test(){
return 'test';
}
function cssswitch_test2(){
return 'test2';
}
Thanks for any help.

Answer 1

hook_menu_alter() is only called during the menu building process, so you can't do dynamic node type checks within that function.
However, to achieve what you want, you can do this with a custom access callback as follows:
// Note, I replaced the '%' in your original code with '%node'. See hook_menu() for details on this.
$items['node/%node/edit/schedulenew2'] = array(
...
'access callback'=>'cssswitch_schedulenew_access',
// This passes in the $node object as the argument.
'access arguments'=>array(1),
...
);
Then, in your new custom access callback:
function cssswitch_schedulenew_access($node) {
// Check that node is the proper type, and that the user has the proper permission.
return $node->type == 'cssswitch' && user_access('view cssswitch');
}
For other node types, this function will return false, thus denying access, and thus removing the tab.