<?php //$Id$
//Copyright (c) 2014-2016 Pierre Pronchery <khorben@defora.org>
//This file is part of DeforaOS Web DaPortal
//
//This program is free software: you can redistribute it and/or modify
//it under the terms of the GNU General Public License as published by
//the Free Software Foundation, version 3 of the License.
//
//This program is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//GNU General Public License for more details.
//
//You should have received a copy of the GNU General Public License
//along with this program.  If not, see <http://www.gnu.org/licenses/>.


//autoload
function autoload($class, $filename = FALSE)
{
	//strip out our own namespace
	if(strncmp($class, 'DaPortal\\', 9) == 0)
		$class = substr($class, 9);
	if($filename !== FALSE)
	{
		_autoload_filename($class, $filename);
		return;
	}
	$res = ($filename = _autoload_filename($class)) !== FALSE
		&& is_readable($filename) ? include_once($filename) : FALSE;
	if($res === FALSE)
		error_log($class.': Could not autoload class');
}

function _autoload_filename($class, $filename = FALSE)
{
	static $classes = array(
		'AuthCredentials' => './system/auth/credentials.php',
		'FormatElements' => './system/format/elements.php',
		'PageElement' => './system/page/element.php');

	//validate the class name
	if(strpos($class, '/') !== FALSE)
		return FALSE;
	if($filename !== FALSE)
	{
		$classes[$class] = $filename;
		return $filename;
	}
	if(isset($classes[$class]))
		return $classes[$class];
	$len = strlen($class);
	//Auth sub-classes
	if($len > 4 && substr($class, -4) == 'Auth')
	{
		$auth = substr($class, 0, $len - 4);
		return './auth/'.strtolower($auth).'.php';
	}
	//Configuration sub-classes
	else if($len > 6 && substr($class, 0, 6) == 'Config')
	{
		$config = substr($class, 6);
		return './system/config/'.strtolower($config).'.php';
	}
	//Content sub-classes (in modules)
	else if($len > 7 && substr($class, -7) == 'Content')
	{
		$module = substr($class, 0, $len - 7);
		return './modules/'.strtolower($module).'/content.php';
	}
	//Database engines
	else if($len > 8 && substr($class, -8) == 'Database')
	{
		$database = substr($class, 0, $len - 8);
		return './database/'.strtolower($database).'.php';
	}
	//Database engine results
	else if($len > 14 && substr($class, -14) == 'DatabaseResult')
	{
		$database = substr($class, 0, $len - 14);
		return './database/'.strtolower($database).'/result.php';
	}
	//Database engine transactions
	else if($len > 19 && substr($class, -19) == 'DatabaseTransaction')
	{
		$database = substr($class, 0, $len - 19);
		return './database/'.strtolower($database).'/transaction.php';
	}
	//Database sub-classes
	else if($len > 8 && substr($class, 0, 8) == 'Database')
	{
		$database = substr($class, 8);
		return './system/database/'.strtolower($database).'.php';
	}
	//Engines
	else if($len > 6 && substr($class, -6) == 'Engine')
	{
		$engine = substr($class, 0, $len - 6);
		return './engines/'.strtolower($engine).'.php';
	}
	//Formats
	else if($len > 6 && substr($class, -6) == 'Format')
	{
		$format = substr($class, 0, $len - 6);
		return './formats/'.strtolower($format).'.php';
	}
	//Modules
	else if($len > 6 && substr($class, -6) == 'Module')
	{
		$module = substr($class, 0, $len - 6);
		return './modules/'.strtolower($module).'/module.php';
	}
	//Responses
	else if($len > 8 && substr($class, -8) == 'Response')
	{
		$response = substr($class, 0, $len - 8);
		return './system/response/'.strtolower($response).'.php';
	}
	//Users
	else if($len > 4 && substr($class, -4) == 'User')
	{
		$module = substr($class, 0, $len - 4);
		return './modules/'.strtolower($module).'/user.php';
	}
	//UserBackends
	else if($len > 11 && substr($class, -11) == 'UserBackend')
	{
		$user = substr($class, 0, $len - 11);
		return './user/'.strtolower($user).'.php';
	}
	//Templates
	else if($len > 8 && substr($class, -8) == 'Template')
	{
		$template = substr($class, 0, $len - 8);
		if(realpath('./templates/'.$template.'.php') !== FALSE)
			return './templates/'.$template.'.php';
		return './templates/'.strtolower($template).'.php';
	}
	//Content sub-classes (in system)
	//XXX has to be after Modules
	else if($len > 7 && substr($class, 0, 7) == 'Content')
	{
		$content = substr($class, 7);
		return './system/content/'.strtolower($content).'.php';
	}
	return './system/'.strtolower($class).'.php';
}

spl_autoload_register('autoload');

?>