pwightman
How to send external notifications only to clients not connected to a channel
I’m building a video call system. When users in a conversation join, they join a conversation:[id] channel. If a user is a first one to join the call, I’d like to send all users not currently connected a push notification (through Apple/Google/etc, not through Phoenix PubSub). I’m struggling to figure out how to query this information. Sockets inside a channel have their user_id attached, so that would be perfect, but it’s looking like that’s not possible? Is there a way? I could manage the state myself, but trying to avoid it if Phoenix is already tracking it for me.
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kokolegorille
It is probably good to have a common channel for all
and filter out with handle_out
sample code
intercept ["join_game"]
# Restrict push to players only
def handle_out("join_game", payload, socket) do
player_id = socket.assigns.current_user.id
if (player_id === payload.challenger_id || player_id === payload.other_id) do
push socket, "join_game", payload
{:noreply, socket}
else
{:noreply, socket}
end
end
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