Permit fetching individual reports with notes preloaded

lib/pleroma/activity.ex

@@ -14,6 +14,7 @@ defmodule Pleroma.Activity do
   alias Pleroma.ReportNote
   alias Pleroma.ThreadMute
   alias Pleroma.User
+  alias Pleroma.Web.ActivityPub.ActivityPub
 
   import Ecto.Changeset
   import Ecto.Query
@@ -153,6 +154,18 @@ def get_bookmark(%Activity{} = activity, %User{} = user) do
 
   def get_bookmark(_, _), do: nil
 
+  def get_report(activity_id) do
+    opts = %{
+      type: "Flag",
+      skip_preload: true,
+      preload_report_notes: true
+    }
+
+    ActivityPub.fetch_activities_query([], opts)
+    |> where(id: ^activity_id)
+    |> Repo.one()
+  end
+
   def change(struct, params \\ %{}) do
     struct
     |> cast(params, [:data, :recipients])

lib/pleroma/web/admin_api/controllers/report_controller.ex

@@ -38,7 +38,7 @@ def index(conn, params) do
   end
 
   def show(conn, %{id: id}) do
-    with %Activity{} = report <- Activity.get_by_id(id) do
+    with %Activity{} = report <- Activity.get_report(id) do
       render(conn, "show.json", Report.extract_report_info(report))
     else
       _ -> {:error, :not_found}