63 lines
1.6 KiB
Elixir
63 lines
1.6 KiB
Elixir
defmodule DemoWeb.RoomChannel do
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use DemoWeb, :channel
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require Logger
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@impl true
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def join("room:lobby", payload, socket) do
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if authorized?(payload) do
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{:ok, socket}
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else
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{:error, %{reason: "unauthorized"}}
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end
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end
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# Channels can be used in a request/response fashion
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# by sending replies to requests from the client
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@impl true
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def handle_in("ping", payload, socket) do
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{:reply, {:ok, payload}, socket}
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end
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#
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# Here is recieved the requests from the client
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# we spawn a new process to compute the result, which
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# is sent back in a new message when the task is finished
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# The new process PID is used as a key for the client to
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# associate the result to its request.
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# the key(id) is immediatly returned to the client.
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#
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@impl true
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def handle_in("fib", payload, socket) do
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me = self()
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id = spawn(fn ->
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result = Funcs.fib(String.to_integer(payload["query"]))
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send(me, {:response, %{id: Kernel.inspect(self()),
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query: payload["query"],
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result: result}})
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end)
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{:reply, {:ok, %{id: Kernel.inspect(id)}}, socket}
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end
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# It is also common to receive messages from the client and
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# broadcast to everyone in the current topic (room:lobby).
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@impl true
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def handle_in("shout", payload, socket) do
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broadcast(socket, "shout", payload)
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{:noreply, socket}
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end
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# Add authorization logic here as required.
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defp authorized?(_payload) do
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true
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end
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@impl true
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def handle_info({:response, map}, socket) do
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Logger.debug("send response #{Kernel.inspect map}")
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push(socket, "response", map)
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{:noreply, socket}
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end
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end
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