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<?php
namespace Dhtmlx\Connector\Data;
class DataUpdate {
protected $table; //!< table , where actions are stored
protected $url; //!< url for notification service, optional
protected $sql; //!< DB wrapper object
protected $config; //!< DBConfig object
protected $request; //!< DBRequestConfig object
protected $event;
protected $item_class;
protected $demu;
//protected $config;//!< DataConfig instance
//protected $request;//!< DataRequestConfig instance
/*! constructor
@param connector
Connector object
@param config
DataConfig object
@param request
DataRequestConfig object
*/
function __construct($sql, $config, $request, $table, $url){
$this->config= $config;
$this->request= $request;
$this->sql = $sql;
$this->table=$table;
$this->url=$url;
$this->demu = false;
}
public function set_demultiplexor($path){
$this->demu = $path;
}
public function set_event($master, $name){
$this->event = $master;
$this->item_class = $name;
}
private function select_update($actions_table, $join_table, $id_field_name, $version, $user) {
$sql = "SELECT * FROM {$actions_table}";
$sql .= " LEFT OUTER JOIN {$join_table} ON ";
$sql .= "{$actions_table}.DATAID = {$join_table}.{$id_field_name} ";
$sql .= "WHERE {$actions_table}.ID > '{$version}' AND {$actions_table}.USER <> '{$user}'";
return $sql;
}
private function get_update_max_version() {
$sql = "SELECT MAX(id) as VERSION FROM {$this->table}";
$res = $this->sql->query($sql);
$data = $this->sql->get_next($res);
if ($data == false || $data['VERSION'] == false)
return 1;
else
return $data['VERSION'];
}
private function log_update_action($actions_table, $dataId, $status, $user) {
$sql = "INSERT INTO {$actions_table} (DATAID, TYPE, USER) VALUES ('{$dataId}', '{$status}', '{$user}')";
$this->sql->query($sql);
if ($this->demu)
file_get_contents($this->demu);
}
/*! records operations in actions_table
@param action
DataAction object
*/
public function log_operations($action) {
$type = $this->sql->escape($action->get_status());
$dataId = $this->sql->escape($action->get_new_id());
$user = $this->sql->escape($this->request->get_user());
if ($type!="error" && $type!="invalid" && $type !="collision") {
$this->log_update_action($this->table, $dataId, $type, $user);
}
}
/*! return action version in XMl format
*/
public function get_version() {
$version = $this->get_update_max_version();
return "<userdata name='version'>".$version."</userdata>";
}
/*! adds action version in output XML as userdata
*/
public function version_output($conn, $out) {
$out->add($this->get_version());
}
/*! create update actions in XML-format and sends it to output
*/
public function get_updates() {
$sub_request = new DataRequestConfig($this->request);
$version = $this->request->get_version();
$user = $this->request->get_user();
$sub_request->parse_sql($this->select_update($this->table, $this->request->get_source(), $this->config->id['db_name'], $version, $user));
$sub_request->set_relation(false);
$output = $this->render_set($this->sql->select($sub_request), $this->item_class);
ob_clean();
header("Content-type:text/xml");
echo $this->updates_start();
echo $this->get_version();
echo $output;
echo $this->updates_end();
}
protected function render_set($res, $name){
$output="";
$index=0;
while ($data=$this->sql->get_next($res)){
$data = new DataItemUpdate($data,$this->config,$index, $name);
$this->event->trigger("beforeRender",$data);
$output.=$data->to_xml();
$index++;
}
return $output;
}
/*! returns update start string
*/
protected function updates_start() {
$start = '<updates>';
return $start;
}
/*! returns update end string
*/
protected function updates_end() {
$start = '</updates>';
return $start;
}
/*! checks if action version given by client is deprecated
@param action
DataAction object
*/
public function check_collision($action) {
$version = $this->sql->escape($this->request->get_version());
//$user = $this->sql->escape($this->request->get_user());
$last_version = $this->get_update_max_version();
if (($last_version > $version)&&($action->get_status() == 'update')) {
$action->error();
$action->set_status('collision');
}
}
}
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