<?php

function waitUser() {
  echo "Sleep. Press enter...\n";
  $line = trim(fgets(STDIN));
  fscanf(STDIN, "\n");
  echo "Done. Commiting.\n";
}

class MysqlConnect
{

  protected $link = null;
  protected $host = null;

  public function __construct($host, $database, $username, $password)
  {
    $this->host = $host;
    $this->link = mysql_connect($host, $username, $password, true);
    mysql_select_db($database, $this->link);
  }

  private function log($message) {
    echo "[{$this->host}] {$message}\n";
  }

  public function query($query)
  {
    $this->log($query);
    $res = mysql_query($query, $this->link) or $this->log("ERROR: " . mysql_error());

    return $res;
  }

  public function fetchAll($query)
  {
    $res = $this->query($query);

    $result = array();
    while ($row = mysql_fetch_assoc($res)) {
      $result[] = $row;
    }
    return $res;
  }

  public function insert($table, $data)
  {
    if (!count($data))
      return false;

    list($row) = $data;
    $cols = array();
    foreach ($row as $key => $value) {
      $cols[] = $key;
    }
    $cols = implode(", ", $cols);

    $values = array();
    foreach ($data as $row) {
      $values[] = "'" . implode("', '", $row) . "'";
    }

    $values = "(" . implode("), (", $values) . ")";

    $query = "INSERT INTO `{$table}` ($cols) VALUES {$values}";

    $this->query($query);
  }
}

class ConnectManager
{
  protected $connections = array();
  protected $firstConnection = null;

  protected $lastTxId = null;

  public function __construct($connections)
  {
    $this->connections = $connections;
    $this->firstConnection = array_shift($connections);
  }

  public function query($query)
  {
    foreach ($this->connections as $connection) {
      $connection->query($query);
    }
  }

  public function fetchAll($query)
  {
    foreach ($this->connections as $connection) {
      $connection->fetchAll($query);
    }
  }

  public function insert($table, $data)
  {
    foreach ($this->connections as $connection) {
      $connection->insert($table, $data);
    }
  }

  protected function getTxIdent()
  {
    return uniqid("tx-", true);
  }

  public function txBegin()
  {
    $tid = $this->getTxIdent();
    $this->lastTxId = $tid;
    foreach ($this->connections as $connection) {
      $connection->query("XA START '{$tid}'");
    }
  }

  public function txCommit()
  {
    $tid = $this->lastTxId;
    foreach ($this->connections as $connection) {
//    $connection = $this->firstConnection;
      $connection->query("XA END '{$tid}'");
      $connection->query("XA PREPARE '{$tid}'");
    }

    waitUser();

    foreach ($this->connections as $connection) {
      $connection->query("XA COMMIT '{$tid}'");
    }
  }

  public function txRollback()
  {
    $tid = $this->lastTxId;
    foreach ($this->connections as $connection) {
      $connection->query("XA END '{$tid}'");
      $connection->query("XA RALLBACK '{$tid}'");
    }
  }

}

$int = rand(0, 999);
echo "LAST INT: {$int}\n";

$c1 = new MysqlConnect("localhost", "xa_test", "user", "password");
$c2 = new MysqlConnect("192.168.56.10", "xa_test", "user", "password");

$man = new ConnectManager(array($c1, $c2));
$man->txBegin();

$i = $int;
$c1->insert("some_table", array(array("field" => "field {$i}", "value" => rand(0, 999))));
$c2->insert("some_table", array(array("field" => "field {$i}", "value" => rand(0, 999))));

$man->txCommit();