function do_modify_slice_membership($selections, $slice_id, $slice_members_by_role)
{
global $sa_url;
global $user;
$members_to_add = array();
$members_to_change_role = array();
$members_to_remove = array();
// error_log("Selections = " . print_r($selections, true));
// error_log("SMBR = " . print_r($slice_members_by_role, true));
foreach ($selections as $member_id => $selection_id) {
$is_member = array_key_exists($member_id, $slice_members_by_role);
if ($is_member) {
$role = $slice_members_by_role[$member_id];
if ($selection_id == 0) {
// Remove this member from this slice
$members_to_remove[] = $member_id;
} else {
if ($selection_id != $role) {
// Change the role of this member on this slice
$members_to_change_role[$member_id] = $selection_id;
}
}
} else {
if ($selection_id > 0) {
// Add member to slice
$members_to_add[$member_id] = $selection_id;
}
}
}
// Publish changes atomically to SA
$result = modify_slice_membership($sa_url, $user, $slice_id, $members_to_add, $members_to_change_role, $members_to_remove);
return $result;
}
function change_slice_member_role($sa_url, $signer, $slice_id, $member_id, $role)
{
$member_roles = array($member_id => $role);
$result = modify_slice_membership($sa_url, $signer, $slice_id, array(), $member_roles, array());
return $result;
}