* @version 0.1
* @since 0.1
* @copyright GNU Lesser General Public License (LGPL) version 3
*/
/**
* Navi
*
* manages referers, redirection and provides URL manipulation
*/
class NaviHelper {
public function __construct() {
if (!isset($_SESSION['appReferrers'])) {
$_SESSION['appReferrers'] = array();
}
}
// ---- REFERERS handling ----------------------------------------------------
public function autoReferrer($historic=false) {
$url = $_SERVER['REQUEST_URI'];
if ($historic) {
$url = substr($_SERVER['HTTP_REFERER'],strlen(APP_WWW_URL));
} else {
/*
$url = $_SERVER['PHP_SELF']
.(($_SERVER['QUERY_STRING'])?('?'.$_SERVER['QUERY_STRING']):'');
*/
}
if (!preg_match('/login/',$url)) {
return $url;
} else {
// skip login, register, logout and password reminder pages
return false;
}
}
public function setReferrer($url='') {
$_SESSION['appReferrers'] = array();
if ($url) {
$_SESSION['appReferrers'][] = StringHelper::camelToFlat($url);
}
}
public function addReferrer($url='', $historic=false) {
if (!$url) {
if (!$url = $this->autoReferrer($historic)) {
return false;
}
}
$url = StringHelper::camelToFlat($url);
$arr = $_SESSION['appReferrers']; // copy
// search for previous entry with same url
while ($tmp = @array_pop($arr)) {
if ($tmp == $url) {
// been to this page, need to clean referrers
$_SESSION['appReferrers'] = $arr;
break;
}
}
// add url to referrer
$_SESSION['appReferrers'][] = $url;
return true;
}
public function addAppReferrer($params=NULL) {
$fc = FrontController::getInstance();
if (!empty($params)) {
$params = StringHelper::mixedToArray($params);
$arr = array();
foreach($params as $p) {
if (array_key_exists($p, $fc->request)) {
$arr[$p] = $fc->request[$p];
}
}
$this->addReferrer($fc->thisUrl($arr));
} else {
$this->addReferrer($fc->thisUrl());
}
}
public function getReferrer($skip=true, $clean=false) {
$url = './';
$arr = $_SESSION['appReferrers']; // copy
if ($clean) {
$arr =& $_SESSION['appReferrers']; // point
}
if (!is_array($arr)) {
// normally not needed, but seems to happen for some reason
$arr = array();
}
FrontController::log_debug('Refs : '.implode(', ',$arr));
if ($skip) {
array_pop($arr); // skip last one
}
while (count($arr)) {
if ($tmp = array_pop($arr)) {
$url = $tmp;
break;
}
}
return $url;
}
public function naturalReferrer($default, $avoid='') {
$ref = $default;
if ($_REQUEST['ref']) {
$ref = $_REQUEST['ref'];
} else if ($_SERVER['HTTP_REFERER']) {
$ref = $_SERVER['HTTP_REFERER'];
}
if ($avoid && preg_match("/$avoid/i",$ref)) {
$ref = $default;
}
return $ref;
}
public function delReferrer() {
array_pop($_SESSION['appReferrers']);
}
public function printReferrers() {
foreach ($_SESSION['appReferrers'] as $url) {
echo ' > '.$url.'';
}
}
// ---- URLs and REDIRECTION -------------------------------------------------
public function autoRedirect($message='') {
$this->redirect($this->getReferrer(true, true), $message);
}
public static function redirect($url,$message='',$forceRef=false)
{
if (@constant('TZN_TRANS_ID')) {
if (session_id() && (!preg_match('/'.session_id().'/i',$url))) {
$url = $this->concatUrl($url,session_name()
.'='.session_id());
}
}
if ($message) {
$message = preg_replace("/]*>[^<]+<\/script[^>]*>/is"
,"", $message);
$message = preg_replace("/<\/?(div|span|iframe|frame|input|"
."textarea|script|style|applet|object|embed|form)[^>]*>/is"
,"", $message);
if (@constant('TZN_TRANS_STATUS')) {
$fc = FrontController::getInstance();
$fc->addMessage($message);
} else {
$url = self::concatUrl($url,'tznMessage='.urlencode($message));
}
}
if ($forceRef) {
$url = self::concatUrl($url,'ref='.rawurlencode($_SERVER['REQUEST_URI']));
}
header("Location: ".str_replace('&','&',$url));
exit;
}
public static function concatUrl($url,$param)
{
// hash
$hash = '';
if ($pos = strpos($url,'#')) {
$hash = substr($url,$pos);
$url = substr($url,0,$pos);
}
if ($pos = strpos($param,'#')) {
$hash = substr($param,$pos);
}
// params
$url = str_replace('&','&',$url);
if ($pos = strpos($url,'?')) {
$arrParam = explode('=',$param);
if (strpos($url,$arrParam[0].'=')) {
// parameter already in url
$strQuery = substr($url,$pos+1);
$arrQuery = explode('&',$strQuery);
$arrResult = array();
$found = false;
foreach ($arrQuery as $value) {
if (preg_match('/^'.$arrParam[0].'=/', $value)) {
if ($arrParam[1]) {
// add only if has a value
$arrResult[] = $param;
}
$found = true;
} else {
$arrResult[] = $value;
}
}
if ($found) {
$url = substr($url,0,$pos).'?'.implode('&',$arrResult);
} else {
$url .= '&'.$param;
}
} else {
$url .= '&'.$param;
}
} else {
$url .= '?'.$param;
}
return str_replace('&','&',$url).$hash;
}
}