From fef23beb31d3fa7c380fb29e27ddd94f600cd867 Mon Sep 17 00:00:00 2001
From: Makis Otman <makisotman@gmail.com>
Date: Fri, 18 Sep 2015 16:52:18 +0100
Subject: [PATCH] Add Elixir version

---
 elixir/config/config.exs         |  1 +
 elixir/lib/gilded_rose.ex        | 48 ++++++++++++++++++++++++++++++++
 elixir/lib/item.ex               |  3 ++
 elixir/mix.exs                   |  9 ++++++
 elixir/test/gilded_rose_test.exs |  6 ++++
 elixir/test/test_helper.exs      |  1 +
 6 files changed, 68 insertions(+)
 create mode 100644 elixir/config/config.exs
 create mode 100644 elixir/lib/gilded_rose.ex
 create mode 100644 elixir/lib/item.ex
 create mode 100644 elixir/mix.exs
 create mode 100644 elixir/test/gilded_rose_test.exs
 create mode 100644 elixir/test/test_helper.exs

diff --git a/elixir/config/config.exs b/elixir/config/config.exs
new file mode 100644
index 00000000..d2d855e6
--- /dev/null
+++ b/elixir/config/config.exs
@@ -0,0 +1 @@
+use Mix.Config
diff --git a/elixir/lib/gilded_rose.ex b/elixir/lib/gilded_rose.ex
new file mode 100644
index 00000000..20a3796c
--- /dev/null
+++ b/elixir/lib/gilded_rose.ex
@@ -0,0 +1,48 @@
+defmodule GildedRose do
+  # Example
+  # update_quality([%Item{name: "Backstage passes to a TAFKAL80ETC concert", sell_in: 9, quality: 1}])
+  # => [%Item{name: "Backstage passes to a TAFKAL80ETC concert", sell_in: 9, quality: 3}]
+
+  def update_quality(items) do
+    Enum.map(items, &update_item/1)
+  end
+
+  def update_item(item) do
+    cond do
+      item.quality == 0 ->
+        item
+      item.sell_in < 0 && item.name == "Backstage passes to a TAFKAL80ETC concert" ->
+        %{item | quality: 0}
+      item.name == "Aged Brie" || item.name == "Backstage passes to a TAFKAL80ETC concert" ->
+        if item.name == "Backstage passes to a TAFKAL80ETC concert" && item.sell_in > 5 && item.sell_in <= 10 do
+          %{item | quality: item.quality + 2}
+        else
+          if item.name == "Backstage passes to a TAFKAL80ETC concert" && item.sell_in >= 0 && item.sell_in <= 5 do
+            %{item | quality: item.quality + 3}
+          else
+            if item.quality < 50 do
+              %{item | quality: item.quality + 1}
+            else
+              item
+            end
+          end
+        end
+      item.sell_in < 0 ->
+        if item.name == "Backstage passes to a TAFKAL80ETC concert" do
+          %{item | quality: 0}
+        else
+          if item.name == "+5 Dexterity Vest" || item.name == "Elixir of the Mongoose" do
+            %{item | quality: item.quality - 2}
+          else
+            item
+          end
+        end
+      item.name == "+5 Dexterity Vest" || item.name == "Elixir of the Mongoose" ->
+        %{item | quality: item.quality - 1}
+      item.name != "Sulfuras, Hand of Ragnaros" ->
+        %{item | quality: item.quality - 1}
+      true ->
+        item
+    end
+  end
+end
diff --git a/elixir/lib/item.ex b/elixir/lib/item.ex
new file mode 100644
index 00000000..0a20edbf
--- /dev/null
+++ b/elixir/lib/item.ex
@@ -0,0 +1,3 @@
+defmodule Item do
+  defstruct name: nil, sell_in: nil, quality: nil
+end
diff --git a/elixir/mix.exs b/elixir/mix.exs
new file mode 100644
index 00000000..c50af0d0
--- /dev/null
+++ b/elixir/mix.exs
@@ -0,0 +1,9 @@
+defmodule GildedRose.Mixfile do
+  use Mix.Project
+
+  def project do
+    [app: :gilded_rose,
+     version: "0.0.1",
+     elixir: "~> 1.0"]
+  end
+end
diff --git a/elixir/test/gilded_rose_test.exs b/elixir/test/gilded_rose_test.exs
new file mode 100644
index 00000000..b0db3381
--- /dev/null
+++ b/elixir/test/gilded_rose_test.exs
@@ -0,0 +1,6 @@
+defmodule GildedRoseTest do
+  use ExUnit.Case
+
+  test "begin the journey of refactoring" do
+  end
+end
diff --git a/elixir/test/test_helper.exs b/elixir/test/test_helper.exs
new file mode 100644
index 00000000..869559e7
--- /dev/null
+++ b/elixir/test/test_helper.exs
@@ -0,0 +1 @@
+ExUnit.start()