icecast_see_controller.ex
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icecast_see_controller.ex
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	defmodule NolaWeb.IcecastSseController do
	use NolaWeb, :controller
	require Logger

	@ping_interval 20_000

	def sse(conn, _params) do
	conn
	\|> put_resp_header("X-Accel-Buffering", "no")
	\|> put_resp_header("content-type", "text/event-stream")
	\|> send_chunked(200)
	\|> subscribe
	\|> send_sse_message("ping", "ping")
	\|> send_sse_message("icecast", Nola.IcecastAgent.get)
	\|> sse_loop
	end

	def subscribe(conn) do
	:timer.send_interval(@ping_interval, {:event, :ping})
	{:ok, _} = Registry.register(Nola.BroadcastRegistry, "icecast", [])
	conn
	end

	def sse_loop(conn) do
	{type, event} = receive do
	{:event, :ping} -> {"ping", "ping"}
	{:icecast, stats} -> {"icecast", stats}
	end

	conn
	\|> send_sse_message(type, event)
	\|> sse_loop()
	end

	defp send_sse_message(conn, type, data) do
	json = Jason.encode!(%{type => data})
	{:ok, conn} = chunk(conn, "event: #{type}\ndata: #{json}\n\n")
	conn
	end

	end