/**
* validateSession()
*
* Returns true if a session has already been created in an
* attempt to prevent abuse of the listener.
*/
function validateSession()
{
global $A;
// Activity object
global $name;
$name = getName();
if (cookieVar(LACE_SESSION_COOKIE) === false && !$A->keyExists($name)) {
joinMessage($name);
}
$A->update($name);
setcookie(LACE_SESSION_COOKIE, getCookieString(), time() + 600, LACE_URL_REL);
setcookie(LACE_NAME_COOKIE, $name, time() + 2592000, LACE_URL_REL);
return true;
}
/**
* laceListener()
*
* Checks POST variables for incoming messages or
* update requests.
*/
function laceListener($fromListener = true)
{
$cookie_name = cookieVar(LACE_NAME_COOKIE, false);
$post_name = postVar('name', false);
// name
$post_text = postVar('text', false);
// text
if ($post_name !== false && $post_text !== false) {
if (validateSession() === false) {
return '"chat":{"nodata":"1"}';
}
if (isFlooding() === true) {
return '"chat":{"nodata":"1"}';
}
$message = prepareMessage($post_name, $post_text);
if ($message !== false) {
if ($cookie_name && $cookie_name != $post_name) {
addNameChange($cookie_name, $post_name);
} else {
global $A;
// Activity object
joinMessage($post_name);
$A->update($post_name);
}
// Reset $name just in case it has been changed
global $name;
$name = $post_name;
setcookie(LACE_NAME_COOKIE, $post_name, time() + 259200, LACE_URL_REL);
addMessage($message);
}
}
if ($fromListener) {
$chatHash = postVar('chatHash', false);
if ($chatHash) {
$hash = getMessageHash();
if (validateSession() === false || $chatHash == $hash) {
return '"chat":{"nodata":""}';
}
$json = '"chat":{"hash":"' . $hash . '","data":"';
$json .= addslashes(str_replace("\n", "", printFileContentsHTML())) . '"}';
return $json;
}
return '"chat":{"nodata":""}';
}
return '"chat":{"nodata":""}';
}