I would like to implement a banned feature in a chat and I think the easiest way would be to somehow put %{banned_in: ["chat:1", "chat:4", ...]} in the banned socket’s assigns. Is there an easy way to do this?

[image] idi527: And I broadcast something like Test.Web.Endpoint.broadcast “user_socket:YL9ewkRK/Fg8”, “test”, %{}. That is because you are broadcasting to the id topic, which is good for pretty much only killing the channel entirely and all topics built on it, this is not what you want. Ins…

Yep, send a message from that other process to the process that you want to change the asisgn in and let it change it itself. :slight_smile: That is the Actor way to change any data in a process from elsewhere. ^.^

Thanks, but how do I get the pid of the process that keeps the socket which I want to ban? Oh, stupid me, I can just send it a message via MyApp.Endpoint.push/3 Oops, there is no MyApp.Endpoint.push/3 …

[image] idi527: Thanks, but how do I get pid of the process that keeps the socket which I want to ban? Register it somewhere is the traditional way, however it sounds like you are using Phoenix channels, in which case it has a system for this for you already! :slight_smile: Look in the Chan…

So do I understand correctly that every user’s socket (since every user can be banned somewhere) would subscribe itself to user_id topic in the PubSub so that sometime later it can receive a message that it has been banned? It might sound like a premature optimization, but how much overhead would t…

[image] idi527: So do I understand correctly that every user’s socket (since every user can be banned somewhere) would subscribe itself to user_id topic in the PubSub so that sometime later it can receive a message that it has been banned? Yep yep, try to make sure the topic names would be un…

Did you check out: https://hexdocs.pm/phoenix/Phoenix.Socket.html#c:id/1

Thanks, that’s exactly what I need. But where do I handle this message? In MyApp.UserSocket or in MyApp.UserChannel? Can’t find an example on github.

IIRC, you would receive it in your channels and intercept it (see “Intercepting Outgoing Events” in the channel doc) to change the state instead of actually broadcasting to frontends.

Can’t make it work … channel/user_socket.ex defmodule Test.Web.UserSocket do use Phoenix.Socket ## Channels channel "user:*", Test.Web.UserChannel ## Transports transport :websocket, Phoenix.Transports.WebSocket def connect(_params, socket) do id = :crypto.strong_rand_bytes(9) |>…

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How to put something in a socket's assigns from another process

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idi527 April 10, 2017, 6:55pm 7

Thanks again!

Broadcast to socket without channel