function wsOnMessage($clientID, $message, $messageLength, $binary)
{
global $users;
$message = explode(' ', $message);
$command = array_shift($message);
if ($command == 'J') {
if (isUser($clientID)) {
wsClose($clientID);
return;
}
$name = trim($message[0]);
if ($name == '') {
wsClose($clientID);
return;
}
if (nameTaken($name)) {
wsClose($clientID);
return;
}
addUser($clientID, $name);
} else {
if ($messageLength == 0 || !isUser($clientID)) {
wsClose($clientID);
return;
} else {
if ($command == 'D') {
$c = $users[$clientID];
// Update client parameters
$c->ang = $message[0];
$c->pos[0] = $message[1];
$c->pos[1] = $message[2];
$c->vel[0] = $message[3];
$c->vel[1] = $message[4];
// Let other clients know that new data is available
foreach ($users as $userID => $data) {
if ($userID != $clientID) {
$users[$userID]->queue[$clientID] = 1;
}
}
$data = '';
// Send updates back to the client
foreach ($c->queue as $userID => $one) {
if ($one) {
$u = $users[$userID];
$data .= ' ' . $u->name . ' ' . $u->ang . ' ' . $u->pos[0] . ' ' . $u->pos[1] . ' ' . $u->vel[0] . ' ' . $u->vel[1];
$c->queue[$userID] = 0;
}
}
wsSend($clientID, 'D' . $data);
} elseif ($command == 'Q') {
removeUser($clientID);
} else {
wsClose($clientID);
}
}
}
}
function wsOnMessage($clientID, $message, $messageLength, $binary)
{
// check if message length is 0
if ($messageLength == 0) {
wsClose($clientID);
return;
}
// split the message by spaces into an array, and fetch the command
$message = explode(' ', $message);
$command = array_shift($message);
// check which command was received
if ($command == 'TEXT') {
// a client has sent chat text to the server
if (!isUser($clientID)) {
// the client has not yet sent a JOIN with a valid username, and is trying to send a TEXT
wsClose($clientID);
return;
}
// put the message back into a string
$text = implode(' ', $message);
if ($text == '') {
// the text is blank
wsSend($clientID, 'SERVER Message was blank.');
return;
}
// fetch the client's username, and send the chat text to all clients
// the text is actually also sent back to the client which sent the text, which sort of acts as a confirmation that the text worked
$username = getUsername($clientID);
sendChat($username, $text);
} elseif ($command == 'JOIN') {
// a client is joining the chat
if (isUser($clientID)) {
// the client has already sent a JOIN with a valid username
wsClose($clientID);
return;
}
// fetch username, and trim any whitespace before and after the username
$username = trim($message[0]);
if ($username == '') {
// the username is blank
wsClose($clientID);
return;
}
if (strlen($username) > CB_MAX_USERNAME_LENGTH) {
// username length is more than CB_MAX_USERNAME_LENGTH
wsSend($clientID, 'SERVER Username length cannot be more than ' . CB_MAX_USERNAME_LENGTH . '.');
wsClose($clientID);
return;
}
if (isUsername($username)) {
// username is already being used by another client
wsSend($clientID, 'SERVER Username already taken.');
wsClose($clientID);
return;
}
// add the user
addUser($clientID, $username);
} elseif ($command == 'QUIT') {
// a client is leaving the chat
if (!isUser($clientID)) {
// the client has not yet sent a JOIN with a valid username, and is trying to send a QUIT
wsClose($clientID);
return;
}
// remove the user
removeUser($clientID);
} else {
// unknown command received, close connection
wsClose($clientID);
}
}
