silverstripe-framework/Security/Member_GroupSet.php

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<?php
namespace SilverStripe\Security;
use SilverStripe\ORM\DataObject;
use SilverStripe\ORM\DB;
use SilverStripe\ORM\ManyManyList;
use SilverStripe\ORM\Queries\SQLSelect;
/**
* Represents a set of Groups attached to a member.
* Handles the hierarchy logic.
*/
class Member_GroupSet extends ManyManyList
{
protected function linkJoinTable()
{
// Do not join the table directly
if ($this->extraFields) {
user_error('Member_GroupSet does not support many_many_extraFields', E_USER_ERROR);
}
}
/**
* Link this group set to a specific member.
*
* Recursively selects all groups applied to this member, as well as any
* parent groups of any applied groups
*
* @param array|integer $id (optional) An ID or an array of IDs - if not provided, will use the current
* ids as per getForeignID
* @return array Condition In array(SQL => parameters format)
*/
public function foreignIDFilter($id = null)
{
if ($id === null) {
$id = $this->getForeignID();
}
// Find directly applied groups
$manyManyFilter = parent::foreignIDFilter($id);
$query = new SQLSelect('"Group_Members"."GroupID"', '"Group_Members"', $manyManyFilter);
$groupIDs = $query->execute()->column();
// Get all ancestors, iteratively merging these into the master set
$allGroupIDs = array();
while ($groupIDs) {
$allGroupIDs = array_merge($allGroupIDs, $groupIDs);
$groupIDs = DataObject::get("SilverStripe\\Security\\Group")->byIDs($groupIDs)->column("ParentID");
$groupIDs = array_filter($groupIDs);
}
// Add a filter to this DataList
if (!empty($allGroupIDs)) {
$allGroupIDsPlaceholders = DB::placeholders($allGroupIDs);
return array("\"Group\".\"ID\" IN ($allGroupIDsPlaceholders)" => $allGroupIDs);
} else {
return array('"Group"."ID"' => 0);
}
}
public function foreignIDWriteFilter($id = null)
{
// Use the ManyManyList::foreignIDFilter rather than the one
// in this class, otherwise we end up selecting all inherited groups
return parent::foreignIDFilter($id);
}
public function add($item, $extraFields = null)
{
// Get Group.ID
$itemID = null;
if (is_numeric($item)) {
$itemID = $item;
} else {
if ($item instanceof Group) {
$itemID = $item->ID;
}
}
// Check if this group is allowed to be added
if ($this->canAddGroups(array($itemID))) {
parent::add($item, $extraFields);
}
}
/**
* Determine if the following groups IDs can be added
*
* @param array $itemIDs
* @return boolean
*/
protected function canAddGroups($itemIDs)
{
if (empty($itemIDs)) {
return true;
}
$member = $this->getMember();
return empty($member) || $member->onChangeGroups($itemIDs);
}
/**
* Get foreign member record for this relation
*
* @return Member
*/
protected function getMember()
{
$id = $this->getForeignID();
if ($id) {
return DataObject::get_by_id('SilverStripe\\Security\\Member', $id);
}
}
}