<?php
/**
 * PHP VoiceViewer - Configuration Class
 *
 * Provides the basic configuration class which can be used instead
 * of a global variable and provides some IO control.
 * Also provides auto completion on paths and urls.
 *
 * Project   : PHP VoiceViewer
 * Copyright : Christopher Cooper © 2010
 * License   : FreeBSD
 * Author    : Christopher Cooper (PaNtHaLooN), hide@address.com
 * Date      : March 2010
 * Version   : 1.0.0
 *
 * Copyright 2010 Christopher Cooper. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 *    1. Redistributions of source code must retain the above copyright notice, this list of
 *       conditions and the following disclaimer.
 *
 *    2. Redistributions in binary form must reproduce the above copyright notice, this list
 *       of conditions and the following disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY CHRISTOPHER COOPER ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CHRISTOPHER COOPER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * The views and conclusions contained in the software and documentation are those of the
 * authors and should not be interpreted as representing official policies, either expressed
 * or implied, of Christopher Cooper.
 */

// Define acronyms
defined('DS') || define('DS', DIRECTORY_SEPARATOR);

class vvConfig implements ArrayAccess
{
	private static $_config = array();
	
	private static $_overwrite = true;
	
	private static $_pattern_set_magic	= '/^(?P<var>\w+)\|(?P<action>\w+)$/';
	private static $_pattern_get_magic	= '/^\w+\|\w+$/';

	private static $_pattern_path_set	= '/^vv_path(?:_\w+)?$/';
	private static $_pattern_path_get	= '/^(?P<var>vv_path_\w+)\|(?P<action>\w+)$/';
	
	private static $_pattern_url_set	= '/^vv_url(?:_\w+)?$/';
	private static $_pattern_url_get	= '/^(?P<var>vv_url_\w+)\|(?P<action>\w+)$/';
	
	public function __construct( array $config = null )
	{
		($config !== null ) && self::$_config = $config;
	}
	
	public function offsetSet( $offset, $value )
	{
		if ( $offset === null )
		{
			self::$_config[] = $value;
			return;
		}
		$noupdate = false;
		if ( preg_match(self::$_pattern_set_magic, $offset, $matches) === 1 )
		{
			$offset = $matches['var'];
			switch( $matches['action'] )
			{
				case 'noupdate':
					$noupdate = true;
					break;
				default:
					break;
			}
		}
		if ( preg_match(self::$_pattern_path_set, $offset) === 1 )
		{
			if ( $value[strlen($value)-1] !== DS )
			$value .= DS;
		}
		else if ( preg_match(self::$_pattern_url_set, $offset) === 1 )
		{
			if ( $value[strlen($value)-1] !== '/' )
			$value .= '/';
		}
		if ( (($noupdate === true) || (self::$_overwrite === false)) &&
			array_key_exists($offset, self::$_config) )
		{
			return;
		}
		self::$_config[$offset] = $value;
	}

	public function offsetExists( $offset )
	{
		if ( array_key_exists($offset, self::$_config) )
		{
			if ( (self::$_config[$offset] !== false) &&
				!(is_string(self::$_config[$offset]) && (strlen(self::$_config[$offset]) === 0)) &&
				(self::$_config[$offset] !== null) &&
				!(is_array(self::$_config[$offset]) && (count(self::$_config[$offset]) > 0)) )
			{
				return true;
			}
		}
		return false;
	}

	public function offsetUnset( $offset )
	{
		unset(self::$_config[$offset]);
	}

	public function offsetGet( $offset )
	{
		$prefix = false;
		if ( preg_match(self::$_pattern_get_magic, $offset) === 1 )
		{
			if ( preg_match(self::$_pattern_path_get, $offset, $matches) === 1 )
			{
				$offset = $matches['var'];
				switch( $matches['action'] )
				{
					case 'full':
						$prefix = self::$_config['vv_path'];
						break;
					default:
						break;
				}
			}
			else if ( preg_match(self::$_pattern_url_get, $offset, $matches) === 1 )
			{
				$offset = $matches['var'];
				switch( $matches['action'] )
				{
					case 'full':
						$prefix = self::$_config['vv_url'];
						break;
					default:
						break;
				}
			}
		}
		if ( array_key_exists($offset, self::$_config) )
		{
			if ( $prefix !== false )
			{
				return $prefix . self::$_config[$offset];
			}
			return self::$_config[$offset];
		}
		return null;
	}
	
	public static function getArray()
	{
		return self::$_config;
	}
	
	public static function setOverwrite( $overwrite = true )
	{
		self::$_overwrite = $overwrite;
	}

}

// Main include
@require_once(dirname(__FILE__) . DS . '..' . DS . 'main.inc.php');

?>