CODEWITHSUNDEEP
javascriptnode.jsoopsocket.iosocket.io-1.0
Luke
Luke

Reputation: 2168

Socket.io client within an object

I am using Node.js, with Socket.IO for communications to the client on my server...

For example:

On my server, I have a User class, which contains basic information and functions about each user. Each time someone connects, a new User object will be created and added to a users array, with the Socket.IO client object parsed to it. Here is the code:

// Set up server, Socket.IO, etc.

users = [];

var User = function(client) {
    this.value = "some random value";
    this.client = client;
    this.client.on("event",function(data) {
        // Do stuff with data
    });
}

socket.on("connection", function(client) {
    users.push(new User(client));
});

My problem is this: when receiving messages with Socket.IO .on(), I want to do stuff the User object which client is owned by. But the problem is that accessing this doesn't access the User object, but rather the client object (or at least I think so, but it isn't the User but rather some Socket.IO object). Even when I refer the .on() function to call a function in my object, like this.event in my User object, I still can't access my User object with this. I tried creating a local variable within each object called self, and setting it to this, like this: self = this;, but I can't edit this, but only self.

Any ideas?

Upvotes: 1

Views: 399

Answers (1)

actor203
actor203

Reputation: 176

this.client.on("event",function(data) {
  console.log(this.value === "some random value"); // true 
}.bind(this));
bind makes this keyword set to the provided value i.e. User object.

Upvotes: 2

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