<?php
/**
 * Mammut base library.
 * Provides basic functionality
 *
 * @since 1.0.0.1
 * @author Stefan Daurer <s.daurer@q-spot.org>
 * @package Mammut
 */

/* $Id$ */
(defined('USE_MAMMUT') && (basename(__FILE__) != basename($_SERVER['PHP_SELF']))) or die('ACCESS DENIED');

/**
 * MAMMUT framework main version
 */
define('MAMMUT', '1.1.0.0');

// check some basic requirements
version_compare(PHP_VERSION, '5.4.0', '>=') or die('PHP >= 5.4 required');
extension_loaded('SPL') or die('SPL extension missing');
extension_loaded('pcre') or die('pcre extension missing');

if(defined('__DS__') && constant('__DS__') != DIRECTORY_SEPARATOR)
	die('incompartible environment,  __DS__ constant is defined but dosen\'t match the directory separator');
elseif(!defined('__DS__'))
	/**
	 * Shorthand for directory separator
	 */
	define('__DS__', DIRECTORY_SEPARATOR);
	
// load other libaries
require_once (__DIR__ . __DS__ . 'lib.array.php'); // array functions
require_once (__DIR__ . __DS__ . 'lib.string.php'); // string functions
require_once (__DIR__ . __DS__ . 'lib.file.php'); // file functions


/**
 * Loads a library defined by a dotted libpath.
 *
 * This function is used to load libaries from the default lib dir. It caches loaded
 * libaries in
 * $GLOBALS['MF']['import'] to improve performens (experimental).
 *
 * @param string $libpath
 *        	dotted libpath of the library that should be included
 * @since 1.0.0.0
 */
function importlib($libpath) {
	static $loaded;
	if(!isset($loaded))
		$loaded = array();
	if(array_search($libpath, $loaded))
		return;
	$parts = explode('.', $libpath);
	$path = '';
	for($i = 0; $i < count($parts) - 1; $i++)
		$path .= $parts[$i] . __DS__;
	$path .= 'lib.' . strtolower($parts[count($parts) - 1]) . '.php';
	if(!include_exists($path))
		throw new Exception('importlib failed: library file not found for ' . $libpath);
	require_once ($path);
	$loaded[] = $libpath;
}

/**
 * Check if a mammut styled library file exists which could be loaded
 * 
 * @param string $libpath        	
 * @return boolean true if a library exists
 */
function lib_exists($libpath) {
	$parts = explode('.', $libpath);
	$path = '';
	for($i = 0; $i < count($parts) - 1; $i++)
		$path .= $parts[$i] . __DS__;
	$path .= 'lib.' . strtolower($parts[count($parts) - 1]) . '.php';
	return include_exists($path);
}

// this method should not exist, but if you want to write your own, do it
if(!function_exists('__autoload')) {
	require_once (__DIR__ . __DS__ . 'AutoLoader' . __DS__ . 'cls.iautoloader.php');
	require_once (__DIR__ . __DS__ . 'AutoLoader' . __DS__ . 'cls.mfautoloader.php');
	spl_autoload_register(array('\Mammut\AutoLoader\MFAutoLoader','loadClass'));
}