From 81ea988b36a76397a6b575aaf98bb814c2ee439b Mon Sep 17 00:00:00 2001
From: Tan Jay Jun <tan@jayjun.com>
Date: Tue, 13 Jun 2017 10:53:53 +0800
Subject: [PATCH] Add invoice line items support

---
 lib/stripe/invoice.ex     |  7 +++----
 lib/stripe/line_item.ex   | 16 ++++++++++++++++
 test/stripe/util_test.exs |  1 +
 3 files changed, 20 insertions(+), 4 deletions(-)
 create mode 100644 lib/stripe/line_item.ex

diff --git a/lib/stripe/invoice.ex b/lib/stripe/invoice.ex
index da33852e..510ca547 100644
--- a/lib/stripe/invoice.ex
+++ b/lib/stripe/invoice.ex
@@ -8,9 +8,7 @@ defmodule Stripe.Invoice do
   - Retrieve an invoice
   - Update an invoice
 
-  Does not yet implement `lines`.
-
-  Does not yet render lists or take options.
+  Does not take options yet.
 
   Stripe API reference: https://stripe.com/docs/api#invoice
   """
@@ -21,7 +19,7 @@ defmodule Stripe.Invoice do
     :id, :object,
     :amount_due, :application_fee, :attempt_count, :attempted,
     :charge, :closed, :currency, :customer, :date, :description, :discount,
-    :ending_balance, :forgiven, :livemode, :metadata,
+    :ending_balance, :forgiven, :lines, :livemode, :metadata,
     :next_payment_attempt, :paid, :period_end, :period_start,
     :receipt_number, :starting_balance, :statement_descriptor,
     :subscription, :subscription_proration_date, :subtotal, :tax,
@@ -45,6 +43,7 @@ defmodule Stripe.Invoice do
     ending_balance: [:retrieve],
     forgiven: [:retrieve, :update],
     id: [:retrieve],
+    lines: [:retrieve],
     livemode: [:retrieve],
     metadata: [:create, :retrieve, :update],
     next_payment_attempt: [:retrieve],
diff --git a/lib/stripe/line_item.ex b/lib/stripe/line_item.ex
new file mode 100644
index 00000000..d6bb02ad
--- /dev/null
+++ b/lib/stripe/line_item.ex
@@ -0,0 +1,16 @@
+defmodule Stripe.LineItem do
+  @moduledoc """
+  Work with Stripe (invoice) line item objects.
+
+  Stripe API reference: https://stripe.com/docs/api/ruby#invoice_line_item_object
+  """
+
+  @type t :: %__MODULE__{}
+
+  defstruct [
+    :id, :object,
+    :amount, :currency, :description, :discountable, :livemode, :metadata,
+    :period, :plan, :proration, :quantity, :subscription, :subscription_item,
+    :type
+  ]
+end
diff --git a/test/stripe/util_test.exs b/test/stripe/util_test.exs
index c16080e6..557fd662 100644
--- a/test/stripe/util_test.exs
+++ b/test/stripe/util_test.exs
@@ -14,6 +14,7 @@ defmodule Stripe.UtilTest do
       assert object_name_to_module("external_account") == Stripe.ExternalAccount
       assert object_name_to_module("file_upload") == Stripe.FileUpload
       assert object_name_to_module("invoice") == Stripe.Invoice
+      assert object_name_to_module("line_item") == Stripe.LineItem
       assert object_name_to_module("list") == Stripe.List
       assert object_name_to_module("plan") == Stripe.Plan
       assert object_name_to_module("refund") == Stripe.Refund