/**
* If pretty URL within admin config is switched on. We will apply pretty URL
* to all the links in ATutor. This function will authenticate itself towards the current pages.
* In our definition, admins, login, registration pages shouldn't have pretty url applied. However,
* if one want to use url_rewrite on these pages, please force it by using the third parameter.
* Note: If system config has turned off this feature, $force will have no effect.
* @param string the Url should be a relative link, have to improve this later on, to check if
* it's a relative link, if not, truncate it.
* @param boolean Available values are AT_PRETTY_URL_IS_HEADER, AT_PRETTY_URL_NOT_HEADER(default)
* use AT_PRETTY_URL_IS_HEADER if url_rewrite is used in php header('Location:..'), absolute path is needed for this.
* @param boolean true to force the url_rewrite, false otheriwse. False is the default.
* @author Harris Wong
*/
function url_rewrite($url, $is_rewriting_header = AT_PRETTY_URL_NOT_HEADER, $force = false)
{
global $_config, $db;
$url_parser = new UrlParser();
$pathinfo = $url_parser->getPathArray();
/* If this is any kind of admins, don't prettify the url
* $_SESSION['is_guest'] is used to check against login/register/browse page, the links on this page will
* only be prettified when a user has logged in.
* Had used $_SESSION[valid_user] before but it created this problem:
* http://www.atutor.ca/atutor/mantis/view.php?id=3426
*/
if ($force || isset($_SESSION['course_id']) && $_SESSION['course_id'] > 0) {
//if course id is defined, apply pretty url.
} else {
if (admin_authenticate(AT_ADMIN_PRIV_ADMIN, AT_PRIV_RETURN) || isset($_SESSION['privileges']) && admin_authenticate($_SESSION['privileges'], AT_PRIV_RETURN) || isset($_SESSION['is_guest']) && $_SESSION['is_guest'] == 1) {
return $url;
}
}
//if we allow pretty url in the system
if ($_config['pretty_url'] > 0) {
$course_id = 0;
//If we allow course dir name from sys perf
if ($_config['course_dir_name'] > 0) {
if (preg_match('/bounce.php\\?course=([\\d]+)$/', $url, $matches) == 1) {
// bounce has the highest priority, even if session is set, work on
// bounce first.
$course_id = $url_parser->getCourseDirName($matches[1]);
} elseif (isset($_REQUEST['course'])) {
//jump menu
$course_id = $url_parser->getCourseDirName($_REQUEST['course']);
} elseif (isset($_REQUEST['p_course'])) {
// is set when guests access public course. @see bounce.php
$course_id = $url_parser->getCourseDirName($_REQUEST['p_course']);
} elseif (isset($_SESSION['course_id']) && $_SESSION['course_id'] > 0) {
$course_id = $url_parser->getCourseDirName($_SESSION['course_id']);
}
} else {
if (isset($_SESSION['course_id'])) {
$course_id = $_SESSION['course_id'];
}
}
$url = $pathinfo[1]->convertToPrettyUrl($course_id, $url);
} elseif ($_config['course_dir_name'] > 0) {
//enabled course directory name, disabled pretty url
if (preg_match('/bounce.php\\?course=([\\d]+)$/', $url, $matches) == 1) {
// bounce has the highest priority, even if session is set, work on
// bounce first.
$course_id = $url_parser->getCourseDirName($matches[1]);
} elseif (isset($_REQUEST['course'])) {
$course_id = $url_parser->getCourseDirName($_REQUEST['course']);
} elseif (isset($_REQUEST['p_course'])) {
// is set when guests access public course. @see bounce.php
$course_id = $url_parser->getCourseDirName($_REQUEST['p_course']);
} elseif (isset($_SESSION['course_id']) && $_SESSION['course_id'] > 0) {
$course_id = $url_parser->getCourseDirName($_SESSION['course_id']);
}
$url = $pathinfo[1]->convertToPrettyUrl($course_id, $url);
}
//instead of putting AT_BASE_HREF in all the headers location, we will put it here.
//Abs paths are required for pretty url because otherwise the url location will be appeneded.
//ie. ATutor_161/blogs/CoURSe_rOAd/blogs/view.php/ot/1/oid/1/ instead of
// ATutor_161/CoURSe_rOAd/blogs/view.php/ot/1/oid/1/
if ($is_rewriting_header == true) {
return AT_BASE_HREF . $url;
}
return $url;
}
