<?php
class E7_Tools_RetryProxy
{
	/**
	 * Number of repititions
	 * @var integer
	 */
	private $_repititions = 3;

	/**
	 * Delay in seconds
	 * @var integer
	 */
	private $_delay = 1;

	/**
	 * Retrieve number of Repititions
	 *
	 * @return	integer
	 */
	public function getRepititions()
	{
		return $this->_repititions;
	}

	/**
	 * Set number of repititions
	 *
	 * @param	integer $repititions
	 * @return	E7_Tools_RetryProxy (fluent interface)
	 */
	public function setRepititions($repititions)
	{
		$this->_repititions = $repititions;
		return $this;
	}

	/**
	 * Retrieve delay in seconds
	 *
	 * @return	integer
	 */
	public function getDelay()
	{
		return $this->_delay;
	}

	/**
	 * Set delay in seconds
	 *
	 * @param	integer $delay
	 * @return	E7_Tools_RetryProxy (fluent interface)
	 */
	public function setDelay($delay)
	{
		$this->_delay = $delay;
		return $this;
	}

	/**
	 * Proxy-Method passes all calls including parameters 
	 *
	 * @param	string $callback
	 * @param	[...] mixed
	 * @return	mixed
	 * @throws	Exception
	 */
	public function call($callback)
	{
		$exception = null;
		$count = 0;
		$args = func_get_args();
		array_shift($args);

		do {
			try {
				return call_user_func_array($callback, $args);
			} catch (Exception $e) {
				$exception = $e;
				sleep($this->getDelay());
			}
		} while ($this->getRepititions() > $count++);

		if ($exception instanceof Exception) {
			throw $exception;
		}
	}
}