1 files changed, 17 insertions, 8 deletions
diff --git a/lib/pleroma/activity/ir/topics.ex b/lib/pleroma/activity/ir/topics.ex
index 9e65bedad..7a603a615 100644
--- a/lib/pleroma/activity/ir/topics.ex
+++ b/lib/pleroma/activity/ir/topics.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.Activity.Ir.Topics do
@@ -8,7 +8,7 @@ defmodule Pleroma.Activity.Ir.Topics do
 
   def get_activity_topics(activity) do
     activity
-    |> Object.normalize()
+    |> Object.normalize(fetch: false)
     |> generate_topics(activity)
     |> List.flatten()
   end
@@ -40,24 +40,33 @@ defmodule Pleroma.Activity.Ir.Topics do
   end
 
   defp item_creation_tags(tags, object, %{data: %{"type" => "Create"}} = activity) do
-    tags ++ hashtags_to_topics(object) ++ attachment_topics(object, activity)
+    tags ++
+      remote_topics(activity) ++ hashtags_to_topics(object) ++ attachment_topics(object, activity)
   end
 
   defp item_creation_tags(tags, _, _) do
     tags
   end
 
-  defp hashtags_to_topics(%{data: %{"tag" => tags}}) do
-    tags
-    |> Enum.filter(&is_bitstring(&1))
-    |> Enum.map(fn tag -> "hashtag:" <> tag end)
+  defp hashtags_to_topics(object) do
+    object
+    |> Object.hashtags()
+    |> Enum.map(fn hashtag -> "hashtag:" <> hashtag end)
   end
 
-  defp hashtags_to_topics(_), do: []
+  defp remote_topics(%{local: true}), do: []
+
+  defp remote_topics(%{actor: actor}) when is_binary(actor),
+    do: ["public:remote:" <> URI.parse(actor).host]
+
+  defp remote_topics(_), do: []
 
   defp attachment_topics(%{data: %{"attachment" => []}}, _act), do: []
 
   defp attachment_topics(_object, %{local: true}), do: ["public:media", "public:local:media"]
 
+  defp attachment_topics(_object, %{actor: actor}) when is_binary(actor),
+    do: ["public:media", "public:remote:media:" <> URI.parse(actor).host]
+
   defp attachment_topics(_object, _act), do: ["public:media"]
 end