/**
* Imports G2 permissions, mapping G2's permission model to G3's
* much simplified permissions.
*
* - Ignores user permissions, G3 only supports group permissions.
* - Ignores item permissions, G3 only supports album permissions.
*
* G2 permission -> G3 permission
* ---------------------------------
* core.view view
* core.viewSource view_full
* core.edit edit
* core.addDataItem add
* core.addAlbumItem add
* core.viewResizes <ignored>
* core.delete <ignored>
* comment.* <ignored>
*/
private static function _import_permissions($g2_album, $g3_album)
{
// No need to do anything if this album has the same G2 ACL as its parent.
if ($g2_album->getParentId() != null && g2(GalleryCoreApi::fetchAccessListId($g2_album->getId())) == g2(GalleryCoreApi::fetchAccessListId($g2_album->getParentId()))) {
return;
}
$granted_permissions = self::_map_permissions($g2_album->getId());
if ($g2_album->getParentId() == null) {
// Compare to current permissions, and change them if necessary.
$g3_parent_album = item::root();
} else {
$g3_parent_album = $g3_album->parent();
}
$granted_parent_permissions = array();
$perm_ids = array_unique(array_values(self::$_permission_map));
foreach (identity::groups() as $group) {
$granted_parent_permissions[$group->id] = array();
foreach ($perm_ids as $perm_id) {
if (access::group_can($group, $perm_id, $g3_parent_album)) {
$granted_parent_permissions[$group->id][$perm_id] = 1;
}
}
}
// Note: Only registering permissions if they're not the same as
// the inherited ones.
foreach ($granted_permissions as $group_id => $permissions) {
if (!isset($granted_parent_permissions[$group_id])) {
foreach (array_keys($permissions) as $perm_id) {
access::allow(identity::lookup_group($group_id), $perm_id, $g3_album);
}
} else {
if ($permissions != $granted_parent_permissions[$group_id]) {
$parent_permissions = $granted_parent_permissions[$group_id];
// @todo Probably worth caching the group instances.
$group = identity::lookup_group($group_id);
// Note: Cannot use array_diff_key.
foreach (array_keys($permissions) as $perm_id) {
if (!isset($parent_permissions[$perm_id])) {
access::allow($group, $perm_id, $g3_album);
}
}
foreach (array_keys($parent_permissions) as $perm_id) {
if (!isset($permissions[$perm_id])) {
access::deny($group, $perm_id, $g3_album);
}
}
}
}
}
foreach ($granted_parent_permissions as $group_id => $parent_permissions) {
if (isset($granted_permissions[$group_id])) {
continue;
// handled above
}
$group = identity::lookup_group($group_id);
foreach (array_keys($parent_permissions) as $perm_id) {
access::deny($group, $perm_id, $g3_album);
}
}
}
