Streamer: Align announce streaming with polling.

lib/pleroma/web/streamer/streamer.ex

@@ -116,6 +116,7 @@ def filtered_by_user?(%User{} = user, %Activity{} = item) do
          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 <- !(item.data["type"] == "Announce" && parent.data["actor"] == user.ap_id),
          true <- Enum.all?([blocked_ap_ids, muted_ap_ids], &(parent.data["actor"] not in &1)),
          true <- MapSet.disjoint?(recipients, recipient_blocks),
          %{host: item_host} <- URI.parse(item.actor),

test/web/streamer/streamer_test.exs

@@ -116,6 +116,18 @@ test "it streams boosts of the user in the 'user' stream", %{user: user} do
       refute Streamer.filtered_by_user?(user, announce)
     end
 
+    test "it does not stream announces of the user's own posts in the 'user' stream", %{
+      user: user
+    } do
+      Streamer.get_topic_and_add_socket("user", user)
+
+      other_user = insert(:user)
+      {:ok, activity} = CommonAPI.post(user, %{status: "hey"})
+      {:ok, announce} = CommonAPI.repeat(activity.id, other_user)
+
+      assert Streamer.filtered_by_user?(user, announce)
+    end
+
     test "it streams boosts of mastodon user in the 'user' stream", %{user: user} do
       Streamer.get_topic_and_add_socket("user", user)