Refactor Repetitive code on PostPageController

lib/diskuy_web/controllers/post_pages_controller.ex

@@ -5,15 +5,23 @@ defmodule DiskuyWeb.PostPagesController do
 
 
   # Pages Per threads
-  def pages_thread(conn, %{"thread_id" => thread_id, "page" => page_num}) do
-    page = ForumPostPage.page_per_thread(thread_id) |> Repo.paginate(page: page_num)
-    with %{entries: _entries} <- page do
-      render(conn, "pages.json", %{page: page})
+  def pages_thread(conn, %{"thread_id" => thread_id}) do
+    query = ForumPostPage.page_per_thread(thread_id) |> Repo.paginate()
+    paginate_and_render(conn, query)
+  end
+
+  defp paginate_and_render(conn, query) do
+    case conn.params do
+      %{"page" => page_num} ->
+        query
+        |> Repo.paginate(page: page_num) |> render_helper(conn)
+      _ ->
+        query
+        |> Repo.paginate(page: 1) |> render_helper(conn)
     end
   end
 
-  def pages_thread(conn, %{"thread_id" => thread_id}) do
-    page = ForumPostPage.page_per_thread(thread_id) |> Repo.paginate()
+  defp render_helper(page, conn) do
     with %{entries: _entries} <- page do
       render(conn, "pages.json", %{page: page})
     end