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kolab_sync_backend_common.php
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kolab_sync_backend_common.php
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<?php
/**
+--------------------------------------------------------------------------+
| Kolab Sync (ActiveSync for Kolab) |
| |
| Copyright (C) 2011-2012, Kolab Systems AG <contact@kolabsys.com> |
| |
| This program is free software: you can redistribute it and/or modify |
| it under the terms of the GNU Affero General Public License as published |
| by the Free Software Foundation, either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU Affero General Public License for more details. |
| |
| You should have received a copy of the GNU Affero General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/> |
+--------------------------------------------------------------------------+
| Author: Aleksander Machniak <machniak@kolabsys.com> |
+--------------------------------------------------------------------------+
*/
/**
* Parent backend class for kolab backends
*/
class kolab_sync_backend_common implements Syncroton_Backend_IBackend
{
/**
* Table name
*
* @var string
*/
protected $table_name;
/**
* Model interface name
*
* @var string
*/
protected $interface_name;
/**
* Backend interface name
*
* @var string
*/
protected $class_name;
/**
* SQL Database engine
*
* @var rcube_db
*/
protected $db;
/**
* Internal cache (in-memory)
*
* @var array
*/
protected $cache = array();
/**
* Constructor
*/
function __construct()
{
$this->db = rcube::get_instance()->get_dbh();
if (empty($this->class_name)) {
$this->class_name = str_replace('Model_I', 'Model_', $this->interface_name);
}
}
/**
* Creates new Syncroton object in database
*
* @param Syncroton_Model_* $object Object
*
* @throws InvalidArgumentException
* @return Syncroton_Model_* Object
*/
public function create($object)
{
if (! $object instanceof $this->interface_name) {
throw new InvalidArgumentException('$object must be instanace of ' . $this->interface_name);
}
$data = $this->object_to_array($object);
$cols = array();
$data['id'] = $object->id = sha1(mt_rand(). microtime());
foreach (array_keys($data) as $key) {
$cols[] = $this->db->quote_identifier($key);
}
$this->db->query('INSERT INTO `' . $this->table_name . '`' . ' (' . implode(', ', $cols) . ')'
. ' VALUES(' . implode(', ', array_fill(0, count($cols), '?')) . ')',
array_values($data)
);
if (!$this->db->insert_id($this->table_name)) {
// @TODO: throw exception
}
return $object;
}
/**
* Returns Syncroton data object
*
* @param string $id
* @throws Syncroton_Exception_NotFound
* @return Syncroton_Model_*
*/
public function get($id)
{
$id = $id instanceof $this->interface_name ? $id->id : $id;
if ($id) {
$select = $this->db->query('SELECT * FROM `' . $this->table_name . '` WHERE `id` = ?', array($id));
$data = $this->db->fetch_assoc($select);
}
if (empty($data)) {
throw new Syncroton_Exception_NotFound('Object not found');
}
return $this->get_object($data);
}
/**
* Deletes Syncroton data object
*
* @param string|Syncroton_Model_* $id Object or identifier
*
* @return bool True on success, False on failure
*/
public function delete($id)
{
$id = $id instanceof $this->interface_name ? $id->id : $id;
if (!$id) {
return false;
}
$result = $this->db->query('DELETE FROM `' . $this->table_name .'` WHERE `id` = ?', array($id));
return (bool) $this->db->affected_rows($result);
}
/**
* Updates Syncroton data object
*
* @param Syncroton_Model_* $object
*
* @throws InvalidArgumentException
* @return Syncroton_Model_* Object
*/
public function update($object)
{
if (! $object instanceof $this->interface_name) {
throw new InvalidArgumentException('$object must be instanace of ' . $this->interface_name);
}
$data = $this->object_to_array($object);
$set = array();
foreach (array_keys($data) as $key) {
$set[] = $this->db->quote_identifier($key) . ' = ?';
}
$this->db->query('UPDATE `' . $this->table_name . '` SET ' . implode(', ', $set)
. ' WHERE `id` = ' . $this->db->quote($object->id), array_values($data));
return $object;
}
/**
* Returns list of user accounts
*
* @param Syncroton_Model_Device $device The current device
*
* @return array List of Syncroton_Model_Account objects
*/
public function userAccounts($device)
{
// this method is overwritten by kolab_sync_backend class
}
/**
* Convert array into model object
*/
protected function get_object($data)
{
foreach ($data as $key => $value) {
unset($data[$key]);
if (!empty($value) && preg_match('/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}/', $value)) { // 2012-08-12 07:43:26
$value = new DateTime($value, new DateTimeZone('utc'));
}
$data[$this->to_camelcase($key, false)] = $value;
}
return new $this->class_name($data);
}
/**
* Converts model object into array
*/
protected function object_to_array($object)
{
$data = array();
foreach ($object as $key => $value) {
if ($value instanceof DateTime) {
$value = $value->format('Y-m-d H:i:s');
} elseif (is_object($value) && isset($value->id)) {
$value = $value->id;
}
$data[$this->from_camelcase($key)] = $value;
}
return $data;
}
/**
* Convert property name from camel-case to lower-case-with-underscore
*/
protected function from_camelcase($string)
{
$string = lcfirst($string);
return preg_replace_callback('/([A-Z])/', function ($string) { return '_' . strtolower($string[0]); }, $string);
}
/**
* Convert property name from lower-case-with-underscore to camel-case
*/
protected function to_camelcase($string, $ucFirst = true)
{
if ($ucFirst) {
$string = ucfirst($string);
}
return preg_replace_callback('/_([a-z])/', function ($string) { return strtoupper($string[1]); }, $string);
}
}

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