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alias Nostrum.Struct
defmodule Audio.Server do
use GenServer
@type which :: String.t()
@type audio_ref :: {}
def start_link(arg) do
{:ok, _} = DynamicSupervisor.start_link(__MODULE__, arg, name: __MODULE__.Supervisor)
{:ok, _} = Registry.start_link(keys: :unique, name: __MODULE__.Registry)
end
@spec play_now(Struct.Guild.id(), audio_ref) :: which
def play_now(guild, audio_ref) do
{:ok, which} = GenServer.call(__MODULE__, {:now, guild, audio_ref})
which
end
@spec enqueue(Struct.Guild.id(), audio_ref) :: which
def enqueue(_guild, _audio_ref) do
GenServer.call(__MODULE__, {:enqueue})
end
@spec cancel(which) :: GenServer.call()
def cancel(which) do
GenServer.call(__MODULE__, {:cancel, which})
end
@impl true
def init(guild) do
{:ok, {guild, :queue.new()}}
end
@impl true
def handle_call({:now, {type, ref, opts}}, _from, {guild, q}) do
if Nostrum.Voice.playing?(guild) do
:ok = Nostrum.Voice.stop(guild)
end
id = UUID.uuid4()
Nostrum.Voice.play(guild, ref, type, opts)
q = :queue.in_r({id, ref}, q)
{:reply, :ok, {guild, q}}
end
@impl true
def handle_call({:enqueue, audio_ref}, _from, {_guild, q}) do
id = UUID.uuid4()
q = :queue.in({id, audio_ref}, q)
{:reply, {:ok, id}, {id, q}}
end
@impl true
def handle_call({:cancel, _audio_ref}, _from, {guild, q}) do
q = :queue.delete_with(fn _elem -> false end, q)
{:reply, :ok, {guild, q}}
end
end
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