<?php
/* vim: set noexpandtab tabstop=2 softtabstop=2 shiftwidth=2: */

class Database extends PDO {
	function __construct($dsn, $username="", $password="", $driver_options=array()) {
		parent::__construct($dsn,$username,$password, $driver_options);

		// Set the statement class to our custom ChainablePDOStatement class
		$this->setAttribute(PDO::ATTR_STATEMENT_CLASS, array('ChainablePDOStatement', array($this)));
	}
}

/*
 * Extend PDOStatement to make functions like bindValue, bindParam and so on
 * chainable.
 */
class ChainablePDOStatement extends PDOStatement {
	protected $pdo;

	protected function __construct($pdo) {
		$this->pdo = $pdo;
	}

	public function bindValue($parameter, $value, $data_type = PDO::PARAM_STR) {
		parent::bindValue($parameter, $value, $data_type);
		return $this;
	}

	public function bindParam($paramno, &$param, $type = NULL, $maxlen = NULL, $driverdata = NULL) {
		parent::bindParam($paramno, $param, $type, $maxlen, $driverdata);
		return $this;
	}

	public function execute($bound_input_params = NULL) {
		parent::execute($bound_input_params);
		return $this;
	}
}