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<?php
/**
* PDO principal backend
*
* This is a simple principal backend that maps exactly to the users table, as
* used by Sabre_DAV_Auth_Backend_PDO.
*
* It assumes all principals are in a single collection. The default collection
* is 'principals/', but this can be overriden.
*
* @package Sabre
* @subpackage DAVACL
* @copyright Copyright (C) 2007-2011 Rooftop Solutions. All rights reserved.
* @author Evert Pot (http://www.rooftopsolutions.nl/)
* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
*/
class Sabre_DAVACL_PrincipalBackend_PDO implements Sabre_DAVACL_IPrincipalBackend {
/**
* pdo
*
* @var PDO
*/
protected $pdo;
/**
* PDO table name for 'principals'
*
* @var string
*/
protected $tableName;
/**
* PDO table name for 'group members'
*
* @var string
*/
protected $groupMembersTableName;
/**
* Sets up the backend.
*
* @param PDO $pdo
* @param string $tableName
*/
public function __construct(PDO $pdo, $tableName = 'principals', $groupMembersTableName = 'groupmembers') {
$this->pdo = $pdo;
$this->tableName = $tableName;
$this->groupMembersTableName = $groupMembersTableName;
}
/**
* Returns a list of principals based on a prefix.
*
* This prefix will often contain something like 'principals'. You are only
* expected to return principals that are in this base path.
*
* You are expected to return at least a 'uri' for every user, you can
* return any additional properties if you wish so. Common properties are:
* {DAV:}displayname
* {http://sabredav.org/ns}email-address - This is a custom SabreDAV
* field that's actualy injected in a number of other properties. If
* you have an email address, use this property.
*
* @param string $prefixPath
* @return array
*/
public function getPrincipalsByPrefix($prefixPath) {
$result = $this->pdo->query('SELECT uri, email, displayname FROM `'. $this->tableName . '`');
$principals = array();
while($row = $result->fetch(PDO::FETCH_ASSOC)) {
// Checking if the principal is in the prefix
list($rowPrefix) = Sabre_DAV_URLUtil::splitPath($row['uri']);
if ($rowPrefix !== $prefixPath) continue;
$principals[] = array(
'uri' => $row['uri'],
'{DAV:}displayname' => $row['displayname']?$row['displayname']:basename($row['uri']),
'{http://sabredav.org/ns}email-address' => $row['email'],
);
}
return $principals;
}
/**
* Returns a specific principal, specified by it's path.
* The returned structure should be the exact same as from
* getPrincipalsByPrefix.
*
* @param string $path
* @return array
*/
public function getPrincipalByPath($path) {
$stmt = $this->pdo->prepare('SELECT id, uri, email, displayname FROM `'.$this->tableName.'` WHERE uri = ?');
$stmt->execute(array($path));
$users = array();
$row = $stmt->fetch(PDO::FETCH_ASSOC);
if (!$row) return;
return array(
'id' => $row['id'],
'uri' => $row['uri'],
'{DAV:}displayname' => $row['displayname']?$row['displayname']:basename($row['uri']),
'{http://sabredav.org/ns}email-address' => $row['email'],
);
}
/**
* Returns the list of members for a group-principal
*
* @param string $principal
* @return array
*/
public function getGroupMemberSet($principal) {
$principal = $this->getPrincipalByPath($principal);
if (!$principal) throw new Sabre_DAV_Exception('Principal not found');
$stmt = $this->pdo->prepare('SELECT principals.uri as uri FROM `'.$this->groupMembersTableName.'` AS groupmembers LEFT JOIN `'.$this->tableName.'` AS principals ON groupmembers.member_id = principals.id WHERE groupmembers.principal_id = ?');
$stmt->execute(array($principal['id']));
$result = array();
while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
$result[] = $row['uri'];
}
return $result;
}
/**
* Returns the list of groups a principal is a member of
*
* @param string $principal
* @return array
*/
public function getGroupMembership($principal) {
$principal = $this->getPrincipalByPath($principal);
if (!$principal) throw new Sabre_DAV_Exception('Principal not found');
$stmt = $this->pdo->prepare('SELECT principals.uri as uri FROM `'.$this->groupMembersTableName.'` AS groupmembers LEFT JOIN `'.$this->tableName.'` AS principals ON groupmembers.principal_id = principals.id WHERE groupmembers.member_id = ?');
$stmt->execute(array($principal['id']));
$result = array();
while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
$result[] = $row['uri'];
}
return $result;
}
/**
* Updates the list of group members for a group principal.
*
* The principals should be passed as a list of uri's.
*
* @param string $principal
* @param array $members
* @return void
*/
public function setGroupMemberSet($principal, array $members) {
// Grabbing the list of principal id's.
$stmt = $this->pdo->prepare('SELECT id, uri FROM `'.$this->tableName.'` WHERE uri IN (? ' . str_repeat(', ? ', count($members)) . ');');
$stmt->execute(array_merge(array($principal), $members));
$memberIds = array();
$principalId = null;
while($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
if ($row['uri'] == $principal) {
$principalId = $row['id'];
} else {
$memberIds[] = $row['id'];
}
}
if (!$principalId) throw new Sabre_DAV_Exception('Principal not found');
// Wiping out old members
$stmt = $this->pdo->prepare('DELETE FROM `'.$this->groupMembersTableName.'` WHERE principal_id = ?;');
$stmt->execute(array($principalId));
foreach($memberIds as $memberId) {
$stmt = $this->pdo->prepare('INSERT INTO `'.$this->groupMembersTableName.'` (principal_id, member_id) VALUES (?, ?);');
$stmt->execute(array($principalId, $memberId));
}
}
}
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