IO.php

<?php
/**
 * Intput Output class
 *
 * @package             Framework
 */

define('SUCCESSFUL',             0);
define('COMMAND_FAILED',         1);
define('TOO_FEW_OPTIONS',        2);
define('NO_MODE_SPECIFIED',      3);
define('INSUFICENT_PRIVILEDGES', 4);
define('INVALID_SELECTION',      5);

// Write states
define('GENERAL', 0);
define('DEBUG',   1);

/**
 * Manage data going out, and coming in.
 *
 * @author              Marco Ceppi <marco.ceppi@seacrow.org>
 * @since               November 8, 2010
 * @package             Framework
 * @subpackage          System
 */
class IO
{
	public static function error($code, $msg = NULL)
	{
		if( !is_null($msg) )
		{
			fwrite(STDERR, "ERROR: $msg" . PHP_EOL);
		}
		
		exit($code);
	}

	public static function write($msg, $state = GENERAL)
	{
		if( $state <= OUTPUT_LEVEL )
		{
			if( is_array($msg) )
			{
				print_r($msg);
				echo PHP_EOL;
			}
			else
			{
				echo $msg . PHP_EOL;
			}
		}
	}
	
	public static function json($data)
	{
		if( !is_array($data) )
		{
			$data = array($data);
		}
		
		self::write(json_encode($data));
	}
	
	public static function debug($msg)
	{
		self::write("DEBUG: $msg", DEBUG);
	}
	
	public static function input($msg)
	{
		echo "$msg: ";
		
		return trim(fgets(STDIN));
	}
}