add phoenix hook for rendering xls templates

Author: rubysolo

lib/excelerator/phoenix.ex

@@ -0,0 +1,17 @@
+defmodule Excelerator.Phoenix do
+  defmacro __using__(options) do
+    quote do
+      def xls(conn, template, data, opts \\ []) do
+        excel_data = view_module(conn).render(template, data)
+
+        default_filename = Phoenix.Naming.resource_name(__MODULE__, "Controller") <> ".xls"
+        filename = Keyword.get(opts, :filename, default_filename)
+
+        conn
+        |> put_resp_content_type("application/vnd.ms-excel")
+        |> put_resp_header("content-disposition", "attachment; filename=#{ filename }")
+        |> send_resp(conn.status || 200, excel_data)
+      end
+    end
+  end
+end