<?php

/*
 * Metafox - flexible content management system
 *
 * rewrite.php - controller for mod_rewrite
 * ____________________________________________________________
 *
 * Developed by Igor Mino <igor@platon.sk>
 * Copyright (c) 2001-2012 Platon Group, http://platon.sk/
 * All rights reserved.
 *
 * See README file for more information about this software.
 * See COPYING file for license information.
 *
 * Download the latest version from
 * http://opensource.platon.sk/projects/Metafox/
 */

/*
 * Logical schema:
 * ----------------
 *
 * if (actual_url == first_type_url) { // index.php?ezin_section_id=name
 *      if (actual_type_url != config_type_url) {
 *           redirect to_config_type_url
 *      } else {
 *           continue actual_url
 *      }
 * }
 *
 * repeat this for second (section.php?name) and third (name/) type of URL
 *
 * Debug levels:
 * --------------
 *
 * 0  - auto redirect according actual configuration for Link redirect
 * 1  - temporary auto redirect (without 301, 302 or similar)
 * >1 - show only link (no redirect)
 *
 */

$link = $_GET['link'];
require_once 'cfgldr.inc.php';

//ezin_cgi_parse(); trouble with link type 1 and redirects, for link type 2 no need

$link_file_type = -1;

// type 0
if ($link == 'index.php'
	|| strlen($link) <= 0)
{
	$link_file_type = 0;
	$setvars = array_keys($_GET);
	if ( $ezin_cfg['link_file_type'] != 0
		&& $ezin_cfg['link_redirect'] > 0
		&& (in_array('ezin_section_key', $setvars)
			|| in_array('ezin_section_id', $setvars)
			|| in_array('ezin_article_key', $setvars)
			|| in_array('ezin_article_id', $setvars)
			|| in_array('ezin_author_key', $setvars)
			|| in_array('ezin_author_id', $setvars)
			|| in_array('ezin_print', $setvars)
			|| in_array('ezin_print', $setvars))
		)
	{ // redirect

		// section
		if (in_array('ezin_section_key', $setvars)) {
			ezin_redirect_section($_GET['ezin_section_key']);
		}
		if (in_array('ezin_section_id', $setvars)) {
			ezin_redirect_section($_GET['ezin_section_id']);
		}
		
		// article
		if (in_array('ezin_article_key', $setvars)
			&& !in_array('ezin_print', $setvars))
		{
			ezin_redirect_article($_GET['ezin_article_key']);
		}
		if (in_array('ezin_article_id', $setvars)
			&& !in_array('ezin_print', $setvars))
		{
			ezin_redirect_article($_GET['ezin_article_id']);
		}
		
		// author
		if (in_array('ezin_author_key', $setvars)) {
			ezin_redirect_author($_GET['ezin_author_key']);
		}
		if (in_array('ezin_author_id', $setvars)) {
			ezin_redirect_author($_GET['ezin_author_id']);
		}

		// print
		if (in_array('ezin_print', $setvars)) {
			if (isset($_GET['ezin_article_key'])) {
				ezin_redirect_print($_GET['ezin_article_key']);
			} else {
				ezin_redirect_print($_GET['ezin_article_id']);
			}
		}


	} else { // normal
		if (strlen($link) == 0) {
			$link = 'index.php';
		}
		if ($ezin_cfg['redirect_equal_url'] == 1) {
			// redirect for old access-key
			$keys = array(
				array('ezin_article_key', 'article_id'),
				array('ezin_section_key', 'section_id'),
				array('ezin_author_key', 'author_id')
			);
			foreach ($keys as $key) {
				$id_param = Platon::parse_id_param($key[0]);
				$ar = ezin_validate_IDs(array($key[1] => $id_param));
				if (isset($ar['redirect'])
					&& $ar['redirect'])
				{
					ezin_redirect_auto($ar);
				}
			}
			// end redirect for old access-key
		}
		
		require_once $link;
	}
}

// type 1
if (in_array($link, array('section.php', 'article.php', 'author.php', 'print.php'))) {
	$link_file_type = 1;
	if ( $ezin_cfg['link_file_type'] != 1
		&& $ezin_cfg['link_redirect'] > 0)
	{ // redirect

		switch ($link) {
			case 'section.php':
				$section_id = Platon::parse_id_param();
				ezin_redirect_section($section_id);
				break;
			case 'article.php':
				$article_id = Platon::parse_id_param();
				ezin_redirect_article($article_id);
				break;
			case 'author.php':
				$author_id = Platon::parse_id_param();
				ezin_redirect_author($author_id);
				break;
			case 'print.php':
				$article_id = Platon::parse_id_param();
				ezin_redirect_print($article_id);
				break;

		}

	} else { // normal
		if ($ezin_cfg['redirect_equal_url'] == 1) {
			// redirect for old access-key
	          $id_param = Platon::parse_id_param();
			switch($link) {
				case 'article.php':
					$ar = ezin_validate_IDs(array('article_id' => $id_param));
					break;
				case 'section.php':
					$ar = ezin_validate_IDs(array('section_id' => $id_param));
					break;
				case 'author.php':
					$ar = ezin_validate_IDs(array('author_id' => $id_param));
					break;
			}
			if (isset($ar['redirect'])
				&& $ar['redirect'])
			{
				ezin_redirect_auto($ar);
			}
			// end redirect for old access-key
		}
		require_once $link;
	}
}

// type 2
if (strlen($link) > 0
	&& strtolower(substr($link, -4)) != '.php')
{
	$link_file_type = 2;
	$args = explode('/', $link);
	//print_r($args);

	if ( $ezin_cfg['link_file_type'] != 2
		&& $ezin_cfg['link_redirect'] > 0)
	{ // redirect

		// section
		if (count($args) == 1
			&& strlen($args[0]) > 0)
		{
			$ar = ezin_validate_IDs(array('section_id' => $args[0]));
			if (intval($ar['section_id']) > 0) {
				ezin_redirect_section($args[0]);
			} else {
				$ar = ezin_validate_IDs(array('article_id' => $args[0]));
				if (intval($ar['article_id']) > 0) {
					ezin_redirect_article($args[0]);
				}
			}
		}

		// others, default: article
		if (count($args) > 1
			&& strlen($args[0]) > 0)
		{

			$showed = false;
			if (ezin_get_rewrite_key($args[0]) == 'author') {
				ezin_redirect_author($args[1]);
				$showed = true;
			}
			if (ezin_get_rewrite_key($args[0]) == 'print') {
				ezin_redirect_print($args[1]);
				$showed = true;
			}
			if (!$showed) {
				ezin_redirect_article($args[1]);
			}

		}
	
	} else { // normal

		// homepage
		if (count($args) <= 0
			|| (count($args) == 1 && strlen($args[0]) == 0))
		{
			require_once 'index.php';
		}

		// section
		if (count($args) == 1
			&& strlen($args[0]) > 0)
		{
			require_once 'cfgldr.inc.php';
			// check article
			if (ezin_exists_article($args[0])
				&& ezin_exists_section($args[0]))
			{
				$ar = ezin_validate_IDs(array('article_id' => $args[0]));
			} else {
				$ar = ezin_validate_IDs(array('section_id' => $args[0]));
			}
			if ($ezin_cfg['redirect_equal_url'] == 1) {
				// redirect for old access-key
				if (isset($ar['redirect'])
					&& $ar['redirect'])
				{
					ezin_redirect_auto($ar);
				}
				// end redirect for old access-key
			}
			
			if (intval($ar['article_id']) > 0) {
				$ezin_cgi['query_string'] = $args;
				$ezin_cgi['input'] = 'article';
			} else {
				$ezin_cgi['query_string'] = $args;
				$ezin_cgi['input'] = 'section';
			}
			require_once 'index.php';
		}

		// others, default: article
		if (count($args) > 1
			&& strlen($args[0]) > 0)
		{
			require_once 'cfgldr.inc.php';

			$showed = false;
			if (ezin_get_rewrite_key($args[0]) == 'author') {
				array_shift($args);
				if ($ezin_cfg['redirect_equal_url'] == 1) {
					// redirect for old access-key
					$ar = ezin_validate_IDs(array('author_id' => $args[0]));
					if (isset($ar['redirect'])
						&& $ar['redirect'])
					{
						ezin_redirect_auto($ar);
					}
					// end redirect for old access-key
				}
				$ezin_cgi['query_string'] = $args;
				$ezin_cgi['input'] = 'author';
				$showed = true;
			}
			if (ezin_get_rewrite_key($args[0]) == 'print') {
				array_shift($args);
				$ezin_cgi['query_string'] = $args;
				$ezin_cgi['input'] = 'print';
				$showed = true;
			}
			if (!$showed) {
				array_shift($args);
				if ($ezin_cfg['redirect_equal_url'] == 1) {
					// redirect for old access-key
		    			$ar = ezin_validate_IDs(array('article_id' => $args[0]));
					if (isset($ar['redirect'])
						&& $ar['redirect'])
					{
						ezin_redirect_auto($ar);
					}
					// end redirect for old access-key
				}
				$ezin_cgi['query_string'] = $args;
				$ezin_cgi['input'] = 'article';
			}

			require_once 'index.php';
		}
	}
	
}

// notfound
if ($link_file_type == -1) {
	require_once 'cfgldr.inc.php';
	$ezin_cgi['input'] = 'notfound';
	require_once 'index.php';
}

?>