Detect and try to stream incoming "direct" messages

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -42,8 +42,13 @@ def insert(map, local \\ true) when is_map(map) do
   def stream_out(activity) do
     if activity.data["type"] in ["Create", "Announce"] do
       Pleroma.Web.Streamer.stream("user", activity)
+      direct? = activity.data["object"]["visibility"] == "direct"
 
-      if Enum.member?(activity.data["to"], "https://www.w3.org/ns/activitystreams#Public") do
+      cond do
+        direct? ->
+          Pleroma.Web.Streamer.stream("direct", activity)
+
+        Enum.member?(activity.data["to"], "https://www.w3.org/ns/activitystreams#Public") ->
           Pleroma.Web.Streamer.stream("public", activity)
 
           if activity.local do

lib/pleroma/web/mastodon_api/mastodon_socket.ex

@@ -15,7 +15,7 @@ def connect(params, socket) do
     with token when not is_nil(token) <- params["access_token"],
          %Token{user_id: user_id} <- Repo.get_by(Token, token: token),
          %User{} = user <- Repo.get(User, user_id),
-         stream when stream in ["public", "public:local", "user"] <- params["stream"] do
+         stream when stream in ["public", "public:local", "user", "direct"] <- params["stream"] do
       socket =
         socket
         |> assign(:topic, params["stream"])