<?php defined("BASEPATH") or exit("No direct script access allowed");
/**
 * Unmark
 *
 * This helper is here so that people don't need to install PECL_HTTP set. If they have it, it will be ignored.
 *
 * @package		Unmark
 * @author		Plain
 * @since		Version 1.6
 * @filesource
 */

	if (!function_exists('http_build_url'))
		{

		    define('HTTP_URL_REPLACE', 1);              // Replace every part of the first URL when there's one of the second URL
		    define('HTTP_URL_JOIN_PATH', 2);            // Join relative paths
		    define('HTTP_URL_JOIN_QUERY', 4);           // Join query strings
		    define('HTTP_URL_STRIP_USER', 8);           // Strip any user authentication information
		    define('HTTP_URL_STRIP_PASS', 16);          // Strip any password authentication information
		    define('HTTP_URL_STRIP_AUTH', 32);          // Strip any authentication information
		    define('HTTP_URL_STRIP_PORT', 64);          // Strip explicit port numbers
		    define('HTTP_URL_STRIP_PATH', 128);         // Strip complete path
		    define('HTTP_URL_STRIP_QUERY', 256);        // Strip query string
		    define('HTTP_URL_STRIP_FRAGMENT', 512);     // Strip any fragments (#identifier)
		    define('HTTP_URL_STRIP_ALL', 1024);         // Strip anything but scheme and host

		    // Build an URL
		    // The parts of the second URL will be merged into the first according to the flags argument. 
		    // 
		    // @param   mixed           (Part(s) of) an URL in form of a string or associative array like parse_url() returns
		    // @param   mixed           Same as the first argument
		    // @param   int             A bitmask of binary or'ed HTTP_URL constants (Optional)HTTP_URL_REPLACE is the default
		    // @param   array           If set, it will be filled with the parts of the composed url like parse_url() would return 
		    function http_build_url($url, $parts=array(), $flags=HTTP_URL_REPLACE, &$new_url=false)
		    {
		        $keys = array('user','pass','port','path','query','fragment');

		        // HTTP_URL_STRIP_ALL becomes all the HTTP_URL_STRIP_Xs
		        if ($flags & HTTP_URL_STRIP_ALL)
		        {
		            $flags |= HTTP_URL_STRIP_USER;
		            $flags |= HTTP_URL_STRIP_PASS;
		            $flags |= HTTP_URL_STRIP_PORT;
		            $flags |= HTTP_URL_STRIP_PATH;
		            $flags |= HTTP_URL_STRIP_QUERY;
		            $flags |= HTTP_URL_STRIP_FRAGMENT;
		        }
		        // HTTP_URL_STRIP_AUTH becomes HTTP_URL_STRIP_USER and HTTP_URL_STRIP_PASS
		        else if ($flags & HTTP_URL_STRIP_AUTH)
		        {
		            $flags |= HTTP_URL_STRIP_USER;
		            $flags |= HTTP_URL_STRIP_PASS;
		        }

		        // Parse the original URL
		        $parse_url = parse_url($url);

		        // Scheme and Host are always replaced
		        if (isset($parts['scheme']))
		            $parse_url['scheme'] = $parts['scheme'];
		        if (isset($parts['host']))
		            $parse_url['host'] = $parts['host'];

		        // (If applicable) Replace the original URL with it's new parts
		        if ($flags & HTTP_URL_REPLACE)
		        {
		            foreach ($keys as $key)
		            {
		                if (isset($parts[$key]))
		                    $parse_url[$key] = $parts[$key];
		            }
		        }
		        else
		        {
		            // Join the original URL path with the new path
		            if (isset($parts['path']) && ($flags & HTTP_URL_JOIN_PATH))
		            {
		                if (isset($parse_url['path']))
		                    $parse_url['path'] = rtrim(str_replace(basename($parse_url['path']), '', $parse_url['path']), '/') . '/' . ltrim($parts['path'], '/');
		                else
		                    $parse_url['path'] = $parts['path'];
		            }

		            // Join the original query string with the new query string
		            if (isset($parts['query']) && ($flags & HTTP_URL_JOIN_QUERY))
		            {
		                if (isset($parse_url['query']))
		                    $parse_url['query'] .= '&' . $parts['query'];
		                else
		                    $parse_url['query'] = $parts['query'];
		            }
		        }

		        // Strips all the applicable sections of the URL
		        // Note: Scheme and Host are never stripped
		        foreach ($keys as $key)
		        {
		            if ($flags & (int)constant('HTTP_URL_STRIP_' . strtoupper($key)))
		                unset($parse_url[$key]);
		        }


		        $new_url = $parse_url;

		        return 
		             ((isset($parse_url['scheme'])) ? $parse_url['scheme'] . '://' : '')
		            .((isset($parse_url['user'])) ? $parse_url['user'] . ((isset($parse_url['pass'])) ? ':' . $parse_url['pass'] : '') .'@' : '')
		            .((isset($parse_url['host'])) ? $parse_url['host'] : '')
		            .((isset($parse_url['port'])) ? ':' . $parse_url['port'] : '')
		            .((isset($parse_url['path'])) ? $parse_url['path'] : '')
		            .((isset($parse_url['query'])) ? '?' . $parse_url['query'] : '')
		            .((isset($parse_url['fragment'])) ? '#' . $parse_url['fragment'] : '')
		        ;
		    }
		}
?>