BuddyPress.org

i’m using the buddypress groups to add a user role to members in the same group .. i hook into the groups_member_after_saveto add the role , which means when the user become a member he get the role .. and groups_member_before_remove to remove the role ,when the user leave the group the role been removed. my code is working like charm now . what i need is , to add this role when the user become admin to the group , and remove the role when he be demoted to mod or member, or be banned or removed.. this is my current code , to add the role to joined members:

function bpmp_add_member($bp_group_admin)
{
  $bp_group = _bpmp_get_group($bp_group_admin->group_id);
  $user = new WP_User($bp_group_admin->user_id);
  $user->add_role(_bpmp_get_role($bp_group));
}

function bpmp_remove_member($bp_group_admin)
{
  $bp_group = _bpmp_get_group($bp_group_admin->group_id);
  $user = new WP_User($bp_group_admin->user_id);
  $user->remove_role(_bpmp_get_role($bp_group));
}

add_action('groups_member_after_save', 'bpmp_add_member', 90, 1);
add_action('groups_member_before_remove', 'bpmp_remove_member', 10, 1);

i just need to know what’s the right hooks to use .. i found these hooks but don’t know how to use its functions parameters with the code above

// define the groups_promote_member callback 
function action_groups_promote_member( $group_id, $user_id, $status ) { 
    // make action magic happen here... 
}; 

// add the action 
add_action( 'groups_promote_member', 'action_groups_promote_member', 10, 3 );

// define the groups_demote_member callback 
function action_groups_demote_member( $group_id, $user_id ) { 
    // make action magic happen here... 
}; 

// add the action 
add_action( 'groups_demote_member', 'action_groups_demote_member', 10, 2 );

any help will be highly appreciated