<?php

/**

* A simple exception handler.

*

* @author Fabien Nouaillat

* @version 1.1

*/

class ExceptionHandler

{

protected $file;

protected $line;

protected $message;

protected $template;

protected $type;

/**

* Turns on exception handling.

*

* @param $template The path of the template file

*

* @throws InvalidArgumentException if the file cannot be found

*/

public function start($template)

{

// Checks the file

if (!is_file($template)):

throw new \InvalidArgumentException(sprintf(

'The file %s cannot be found.', $template

));

endif;

// Launches the output buffer

ob_start();

$this->template = $template;

set_exception_handler(array($this, 'register'));

}

/**

* Turns off exception handling and restores the previous configuration.

*

*/

public function stop()

{

// Shuts down the output buffer

ob_end_flush();

restore_exception_handler();

}

/**

* Transforms errors into exceptions

*

* @param mixed $level The degree of error reporting

*/

public function handleErrorsWithLevel($level)

{

error_reporting($level);

set_error_handler(

function($severity, $message, $filename, $lineno) use ($level)

{

throw new \ErrorException(

$message, 0, $severity, $filename, $lineno

);

}

);

}

/**

* Assignes the exception data to the object's properties

*

* @param Object $exception

*/

public function register($exception)

{

$this->file = $exception->getFile();

$this->line = $exception->getLine();

$this->message = $exception->getMessage();

$this->type = get_class($exception);

$this->display();

}

/**

* Calls the template, parse it and display it.

*

*/

protected function display()

{

$stream = file_get_contents($this->template);

$properties = get_object_vars($this);

// Replaces each property by its value

foreach ($properties as $key => $value):

$variable = sprintf('{{ %s }}', $key);

$stream = str_replace($variable, $value, $stream);

endforeach;

// Erases the output buffer

ob_end_clean();

// Displays the template

echo $stream;

}

}