Create stop (disconnenct) command

lib/sergei/consumer.ex

@@ -16,9 +16,10 @@ defmodule Sergei.Consumer do
 
   @slash_commands [
     {"ping", "Pong", []},
+    {"play", "Play some tunes", @play_opts},
+    {"stop", "Stop media playback and leave the voice channel", []},
     {"pause", "Pause media playback", []},
-    {"resume", "Resume media playback", []},
-    {"play", "Play some tunes", @play_opts}
+    {"resume", "Resume media playback", []}
   ]
 
   def start_link do
@@ -109,6 +110,21 @@ defmodule Sergei.Consumer do
     end
   end
 
+  # /stop
+  def do_command(%{guild_id: guild_id, data: %{name: "stop"}}) do
+    case Sergei.Player.stop(guild_id) do
+      :ok ->
+        {:ok, "Bye!"}
+
+      :not_playing ->
+        {:ok, "I'm not playing anything right now."}
+
+      {:error, err} ->
+        Logger.error("Failed to stop media: #{err}")
+        {:error, "This is embarrasing..."}
+    end
+  end
+
   # /pause
   def do_command(%{guild_id: guild_id, data: %{name: "pause"}}) do
     case Sergei.Player.pause(guild_id) do

lib/sergei/player.ex

@@ -20,6 +20,11 @@ defmodule Sergei.Player do
     GenServer.call(__MODULE__, {:play, guild_id, channel_id, url})
   end
 
+  @spec stop(integer()) :: :ok | :not_playing | {:error, String.t()}
+  def stop(guild_id) do
+    GenServer.call(__MODULE__, {:stop, guild_id})
+  end
+
   @spec pause(integer()) :: :ok | :not_playing | {:error, String.t()}
   def pause(guild_id) do
     GenServer.call(__MODULE__, {:pause, guild_id})
@@ -62,6 +67,14 @@ defmodule Sergei.Player do
     {:reply, :not_playing, state}
   end
 
+  @impl true
+  def handle_call({:stop, guild_id}, _from, state) do
+    Voice.stop(guild_id)
+    Voice.leave_channel(guild_id)
+
+    {:reply, :ok, Map.delete(state, guild_id)}
+  end
+
   @impl true
   def handle_call({:pause, guild_id}, _from, state) do
     %{url: url} = Map.fetch!(state, guild_id)