fix: make final draw filter by minimum badge count (#535)

lib/safira/contest.ex

@@ -801,6 +801,20 @@ defmodule Safira.Contest do
     |> Repo.aggregate(:count, :id)
   end
 
+  def list_final_draw do
+    br_query =
+      BadgeRedeem
+      |> group_by([br], br.attendee_id)
+      |> having([br], count(br.id) >= 10)
+      |> select([br, at, u], %{attendee_id: br.attendee_id, count: count(br.id)})
+
+    Attendee
+    |> join(:inner, [at], br in subquery(br_query), on: br.attendee_id == at.id)
+    |> where([at, br], not at.ineligible)
+    |> preload(:user)
+    |> Repo.all()
+  end
+
   @doc """
   Gets the count of badges for a category.
 

lib/safira_web/controllers/download_controller.ex

@@ -5,6 +5,7 @@ defmodule SafiraWeb.DownloadController do
 
   alias Safira.Accounts
   alias Safira.Companies
+  alias Safira.Contest
 
   def generate_credentials(conn, %{"count" => count}) do
     {count_int, ""} = Integer.parse(count)
@@ -59,7 +60,7 @@ defmodule SafiraWeb.DownloadController do
         |> put_resp_header("content-disposition", "attachment; filename=\"final_draw.csv\"")
         |> send_chunked(200)
 
-      Accounts.list_attendees()
+      Contest.list_final_draw()
       |> Stream.flat_map(&final_draw_lines/1)
       |> Stream.map(&CSV.dump_to_iodata(&1))
       |> Enum.reduce(conn, fn chunk, conn ->
@@ -169,13 +170,9 @@ defmodule SafiraWeb.DownloadController do
     |> to_string()
   end
 
-  defp final_draw_lines(user) do
-    if user.attendee.entries < 10 or user.attendee.ineligible do
-      []
-    else
-      for _ <- 1..user.attendee.entries do
-        [[user.id, user.name, user.handle]]
-      end
+  defp final_draw_lines(attendee) do
+    for _ <- 1..attendee.entries do
+      [[attendee.user.id, attendee.user.name, attendee.user.handle]]
     end
   end