Hide blocked users from interactions

lib/pleroma/web/mastodon_api/mastodon_api_controller.ex

@@ -883,7 +883,10 @@ def favourited_by(%{assigns: %{user: user}} = conn, %{"id" => id}) do
     with %Activity{data: %{"object" => object}} <- Activity.get_by_id(id),
          %Object{data: %{"likes" => likes}} <- Object.normalize(object) do
       q = from(u in User, where: u.ap_id in ^likes)
-      users = Repo.all(q)
+
+      users =
+        Repo.all(q)
+        |> Enum.filter(&(not User.blocks?(user, &1)))
 
       conn
       |> put_view(AccountView)
@@ -897,7 +900,10 @@ def reblogged_by(%{assigns: %{user: user}} = conn, %{"id" => id}) do
     with %Activity{data: %{"object" => object}} <- Activity.get_by_id(id),
          %Object{data: %{"announcements" => announces}} <- Object.normalize(object) do
       q = from(u in User, where: u.ap_id in ^announces)
-      users = Repo.all(q)
+
+      users =
+        Repo.all(q)
+        |> Enum.filter(&(not User.blocks?(user, &1)))
 
       conn
       |> put_view(AccountView)

test/web/mastodon_api/mastodon_api_controller_test.exs

@@ -3768,6 +3768,24 @@ test "returns empty array when status has not been favorited yet", %{
 
       assert Enum.empty?(response)
     end
+
+    test "does not return users who have favorited the status but are blocked", %{
+      conn: %{assigns: %{user: user}} = conn,
+      activity: activity
+    } do
+      other_user = insert(:user)
+      {:ok, user} = User.block(user, other_user)
+
+      {:ok, _, _} = CommonAPI.favorite(activity.id, other_user)
+
+      response =
+        conn
+        |> assign(:user, user)
+        |> get("/api/v1/statuses/#{activity.id}/favourited_by")
+        |> json_response(:ok)
+
+      assert Enum.empty?(response)
+    end
   end
 
   describe "GET /api/v1/statuses/:id/reblogged_by" do
@@ -3807,6 +3825,24 @@ test "returns empty array when status has not been reblogged yet", %{
 
       assert Enum.empty?(response)
     end
+
+    test "does not return users who have reblogged the status but are blocked", %{
+      conn: %{assigns: %{user: user}} = conn,
+      activity: activity
+    } do
+      other_user = insert(:user)
+      {:ok, user} = User.block(user, other_user)
+
+      {:ok, _, _} = CommonAPI.repeat(activity.id, other_user)
+
+      response =
+        conn
+        |> assign(:user, user)
+        |> get("/api/v1/statuses/#{activity.id}/reblogged_by")
+        |> json_response(:ok)
+
+      assert Enum.empty?(response)
+    end
   end
 
   describe "POST /auth/password, with valid parameters" do