Mastodon API: Fix private and direct statuses not being filtered out from the public timeline for an authenticated user (`GET /api/v1/timelines/public`)

4 files changed, 20 insertions, 3 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 43f2935d9..9d7203164 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - ActivityPub: Polls are now refreshed when necessary.
 - Mastodon API: Ensure the `account` field is not empty when rendering Notification entities.
 - Report emails now include functional links to profiles of remote user accounts
+- Mastodon API: Fix private and direct statuses not being filtered out from the public timeline for an authenticated user (`GET /api/v1/timelines/public`)
 
 ### Removed
 - ActivityPub: The `/objects/:uuid/likes` endpoint.
diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex
index 319cd69df..58b002d3c 100644
--- a/lib/pleroma/web/activity_pub/activity_pub.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub.ex
@@ -527,9 +527,10 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
   end
 
   def fetch_public_activities(opts \\ %{}) do
-    q = fetch_activities_query([Pleroma.Constants.as_public()], opts)
+    opts = Map.drop(opts, ["user"])
 
-    q
+    [Pleroma.Constants.as_public()]
+    |> fetch_activities_query(opts)
     |> restrict_unlisted()
     |> Pagination.fetch_paginated(opts)
     |> Enum.reverse()
diff --git a/lib/pleroma/web/mastodon_api/controllers/mastodon_api_controller.ex b/lib/pleroma/web/mastodon_api/controllers/mastodon_api_controller.ex
index fcca6858d..863d673ea 100644
--- a/lib/pleroma/web/mastodon_api/controllers/mastodon_api_controller.ex
+++ b/lib/pleroma/web/mastodon_api/controllers/mastodon_api_controller.ex
@@ -398,7 +398,6 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
       |> Map.put("local_only", local_only)
       |> Map.put("blocking_user", user)
       |> Map.put("muting_user", user)
-      |> Map.put("user", user)
       |> ActivityPub.fetch_public_activities()
       |> Enum.reverse()
 
diff --git a/test/web/mastodon_api/mastodon_api_controller_test.exs b/test/web/mastodon_api/mastodon_api_controller_test.exs
index 24e5785c0..dad832a66 100644
--- a/test/web/mastodon_api/mastodon_api_controller_test.exs
+++ b/test/web/mastodon_api/mastodon_api_controller_test.exs
@@ -96,6 +96,22 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIControllerTest do
            |> json_response(403) == %{"error" => "This resource requires authentication."}
   end
 
+  test "the public timeline includes only public statuses for an authenticated user" do
+    user = insert(:user)
+
+    conn =
+      build_conn()
+      |> assign(:user, user)
+
+    {:ok, _activity} = CommonAPI.post(user, %{"status" => "test"})
+    {:ok, _activity} = CommonAPI.post(user, %{"status" => "test", "visibility" => "private"})
+    {:ok, _activity} = CommonAPI.post(user, %{"status" => "test", "visibility" => "unlisted"})
+    {:ok, _activity} = CommonAPI.post(user, %{"status" => "test", "visibility" => "direct"})
+
+    res_conn = get(conn, "/api/v1/timelines/public")
+    assert length(json_response(res_conn, 200)) == 1
+  end
+
   describe "posting statuses" do
     setup do
       user = insert(:user)