How to send and get data from the server using Ratchet - php

Question

This is the first time I am using sockets and started off with Ratchet but I seriously cant fit my head into it. Still tried to join together some parts from the tutorial but facing some problems. Plus I would like to know how to use autobahn.js with it. The tutorials are not clear.
My Problem
1) How to send a message to all users except the current user stating "
... joined" and the '...' has to be the ip of the user.
I tried the following but it gives me error on the terminal.
public function onOpen(ConnectionInterface $conn) {
// Store the new connection to send messages to later
$this->clients->attach($conn);
$this->send('new');
echo "New connection! ({$conn->remoteAddress})\n";
}
Call to undefined method MyApp\Chat::send()
2) What to do so that when a message is sent all the parties can view it including the one who is sending it (that's the way how every chat works)?
JS
var conn = new WebSocket('ws://localhost:8080');
conn.onopen = function(e) {
//console.log("Connection established!");
$("#chat_window #messages_list").append("<li class='join_disconnect'>127.0.0.1 Online</li>");
}
conn.onmessage = function(e) {
//console.log(e.data);
$("#chat_window #messages_list").append("<li class='thread'>"+e.data+"</li>");
}
conn.onclose = function(e) {
//console.log("Connection Disconnected!");
$("#chat_window #messages_list").append("<li class='join_disconnect'>127.0.0.1 Offline</li>");
};
$(document).ready(function(){
disable_button();
//EMERGENCY EXIT
$('#exit').click(function(){
window.location.replace('http://www.google.com');
});
//PREVENT BLANK INPUT
$('#msg').on('keyup', function(e){
if($(this).val().length>0){
enable_button();
}
else{
disable_button();
}
});
//SEND MESSAGE
$('#snd').click(function(){
var thread = $('#msg').val();
//console.log(thread);
//conn.send(thread);
$.ajax({
type:'POST',
url: './bin/send-message.php',
data: {msg: thread},
success: function(response){
//alert(response);
if(response!=1){
$('#msg').val('');
disable_button();
}
}
});
});
//ENABLE BUTTON
function enable_button() {
var element = document.getElementById('snd');
$(element).addClass('active');
element.style.pointerEvents = '';
}
//DISABLE BUTTON
function disable_button() {
var element = document.getElementById('snd');
$(element).removeClass('active');
element.style.pointerEvents = 'none';
}
});
I know these are a lot of questions but I really want to know how. If there are any step by step easy to learn tutorials those are also welcome.

Answer 1

If you are trying to change example from the tutorial at the Rachet site, than for your first problem solution is:
public function onOpen(ConnectionInterface $conn) {
// first, you are sending to all existing users message of 'new'
foreach ($this->clients as $client) {
$client->send('new');
}
// than,
// Store the new connection to send messages to later
$this->clients->attach($conn);
echo "New connection! ({$conn->resourceId})\n";
}
Regarding your second question, if I get you right, you should send new messages to all connected clients, like this:
public function onMessage(ConnectionInterface $from, $msg) {
$numRecv = count($this->clients) - 1;
echo sprintf('Connection %d sending message "%s" to %d other connection%s' . "\n"
, $from->resourceId, $msg, $numRecv, $numRecv == 1 ? '' : 's');
foreach ($this->clients as $client) {
// remove this check
// if ($from !== $client) {
// The sender is not the receiver, send to each client connected
// $client->send($msg);
// }
// just send to all
$client->send($msg);
}
}
Update: complete solution.
In the Chat.php, you need to modify some methods:
public function onOpen(ConnectionInterface $conn) {
// first, you are sending to all existing users message of 'new'
foreach ($this->clients as $client) {
$client->send('<status>' . $conn->remoteAddress . ' Online</status>'); //here we are sending a status-message
}
// than,
// Store the new connection to send messages to later
$this->clients->attach($conn);
echo "New connection! ({$conn->remoteAddress})\n";
}
public function onClose(ConnectionInterface $conn) {
// The connection is closed, remove it, as we can no longer send it messages
$this->clients->detach($conn);
//send to others clients message about disconnected user
foreach ($this->clients as $client) {
$client->send('<status>' . $conn->remoteAddress . ' Offline</status>'); //here we are sending a status-message too
}
echo "Connection {$conn->remoteAddress} has disconnected\n";
}
in your js code, modify next method:
conn.onmessage = function(e) {
//console.log(e.data);
var match = e.data.match(/^<status>(.*?)<\/status>$/i);
if (match) {
if (/\d+\.\d+\.\d+\.\d+ online/i.test(match[1])) {
messages.append('<li class="join_connect">' + match[1] + "</li>");
} else if (/\d+\.\d+\.\d+\.\d+ offline/i.test(match[1])) {
messages.append('<li class="join_disconnect">' + match[1] + "</li>");
}
} else {
messages.append('<li class="thread">' + e.data + "</li>");
}
};