1 files changed, 34 insertions, 21 deletions

diff --git a/lib/pleroma/web/streamer.ex b/lib/pleroma/web/streamer.ex
index d618dfe54..fc3bbb130 100644
--- a/lib/pleroma/web/streamer.ex
+++ b/lib/pleroma/web/streamer.ex
@@ -1,5 +1,5 @@
 # Pleroma: A lightweight social networking server
-# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.Streamer do
@@ -36,9 +36,8 @@ defmodule Pleroma.Web.Streamer do
         ) ::
           {:ok, topic :: String.t()} | {:error, :bad_topic} | {:error, :unauthorized}
   def get_topic_and_add_socket(stream, user, oauth_token, params \\ %{}) do
-    case get_topic(stream, user, oauth_token, params) do
-      {:ok, topic} -> add_socket(topic, user)
-      error -> error
+    with {:ok, topic} <- get_topic(stream, user, oauth_token, params) do
+      add_socket(topic, user)
     end
   end
 
@@ -57,14 +56,23 @@ defmodule Pleroma.Web.Streamer do
     {:ok, "hashtag:" <> tag}
   end
 
+  # Allow remote instance streams.
+  def get_topic("public:remote", _user, _oauth_token, %{"instance" => instance} = _params) do
+    {:ok, "public:remote:" <> instance}
+  end
+
+  def get_topic("public:remote:media", _user, _oauth_token, %{"instance" => instance} = _params) do
+    {:ok, "public:remote:media:" <> instance}
+  end
+
   # Expand user streams.
   def get_topic(
         stream,
         %User{id: user_id} = user,
-        %Token{user_id: token_user_id} = oauth_token,
+        %Token{user_id: user_id} = oauth_token,
         _params
       )
-      when stream in @user_streams and user_id == token_user_id do
+      when stream in @user_streams do
     # Note: "read" works for all user streams (not mentioning it since it's an ancestor scope)
     required_scopes =
       if stream == "user:notification" do
@@ -88,10 +96,9 @@ defmodule Pleroma.Web.Streamer do
   def get_topic(
         "list",
         %User{id: user_id} = user,
-        %Token{user_id: token_user_id} = oauth_token,
+        %Token{user_id: user_id} = oauth_token,
         %{"list" => id}
-      )
-      when user_id == token_user_id do
+      ) do
     cond do
       OAuthScopesPlug.filter_descendants(["read", "read:lists"], oauth_token.scopes) == [] ->
         {:error, :unauthorized}
@@ -128,16 +135,10 @@ defmodule Pleroma.Web.Streamer do
 
   def stream(topics, items) do
     if should_env_send?() do
-      List.wrap(topics)
-      |> Enum.each(fn topic ->
-        List.wrap(items)
-        |> Enum.each(fn item ->
-          spawn(fn -> do_stream(topic, item) end)
-        end)
-      end)
+      for topic <- List.wrap(topics), item <- List.wrap(items) do
+        spawn(fn -> do_stream(topic, item) end)
+      end
     end
-
-    :ok
   end
 
   def filtered_by_user?(user, item, streamed_type \\ :activity)
@@ -150,9 +151,8 @@ defmodule Pleroma.Web.Streamer do
     recipients = MapSet.new(item.recipients)
     domain_blocks = Pleroma.Web.ActivityPub.MRF.subdomains_regex(user.domain_blocks)
 
-    with parent <- Object.normalize(item) || item,
-         true <-
-           Enum.all?([blocked_ap_ids, muted_ap_ids], &(item.actor not in &1)),
+    with parent <- Object.normalize(item, fetch: false) || item,
+         true <- Enum.all?([blocked_ap_ids, muted_ap_ids], &(item.actor not in &1)),
          true <- item.data["type"] != "Announce" || item.actor not in reblog_muted_ap_ids,
          true <-
            !(streamed_type == :activity && item.data["type"] == "Announce" &&
@@ -186,6 +186,19 @@ defmodule Pleroma.Web.Streamer do
     end)
   end
 
+  defp do_stream("follow_relationship", item) do
+    text = StreamerView.render("follow_relationships_update.json", item)
+    user_topic = "user:#{item.follower.id}"
+
+    Logger.debug("Trying to push follow relationship update to #{user_topic}\n\n")
+
+    Registry.dispatch(@registry, user_topic, fn list ->
+      Enum.each(list, fn {pid, _auth} ->
+        send(pid, {:text, text})
+      end)
+    end)
+  end
+
   defp do_stream("participation", participation) do
     user_topic = "direct:#{participation.user_id}"
     Logger.debug("Trying to push a conversation participation to #{user_topic}\n\n")