From 41c9c85cd6bf568d29a810302de7b643adaa1d16 Mon Sep 17 00:00:00 2001
From: Martin Frost <frost@ceri.se>
Date: Tue, 5 May 2015 22:15:40 +0200
Subject: [PATCH] WIP

---
 .gitignore           |  5 +++++
 README.md            |  4 ++++
 config/config.exs    | 26 +++++++++++++++++++++++++
 lib/isn/base.ex      | 20 ++++++++++++++++++++
 lib/isn/extension.ex | 21 +++++++++++++++++++++
 lib/isn/isbn13.ex    |  3 +++
 mix.exs              | 45 ++++++++++++++++++++++++++++++++++++++++++++
 mix.lock             |  4 ++++
 test/isn_test.exs    |  8 ++++++++
 test/test_helper.exs |  1 +
 10 files changed, 137 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 README.md
 create mode 100644 config/config.exs
 create mode 100644 lib/isn/base.ex
 create mode 100644 lib/isn/extension.ex
 create mode 100644 lib/isn/isbn13.ex
 create mode 100644 mix.exs
 create mode 100644 mix.lock
 create mode 100644 test/isn_test.exs
 create mode 100644 test/test_helper.exs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..755b605
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+/_build
+/cover
+/deps
+erl_crash.dump
+*.ez
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..0b9448b
--- /dev/null
+++ b/README.md
@@ -0,0 +1,4 @@
+Isn
+===
+
+** TODO: Add description **
diff --git a/config/config.exs b/config/config.exs
new file mode 100644
index 0000000..136603b
--- /dev/null
+++ b/config/config.exs
@@ -0,0 +1,26 @@
+# This file is responsible for configuring your application
+# and its dependencies with the aid of the Mix.Config module.
+use Mix.Config
+
+# This configuration is loaded before any dependency and is restricted
+# to this project. If another project depends on this project, this
+# file won't be loaded nor affect the parent project. For this reason,
+# if you want to provide default values for your application for third-
+# party users, it should be done in your mix.exs file.
+
+# Sample configuration:
+#
+#     config :logger,
+#       level: :info
+#
+#     config :logger, :console,
+#       format: "$date $time [$level] $metadata$message\n",
+#       metadata: [:user_id]
+
+# It is also possible to import configuration files, relative to this
+# directory. For example, you can emulate configuration per environment
+# by uncommenting the line below and defining dev.exs, test.exs and such.
+# Configuration from the imported file will override the ones defined
+# here (which is why it is important to import them last).
+#
+#     import_config "#{Mix.env}.exs"
diff --git a/lib/isn/base.ex b/lib/isn/base.ex
new file mode 100644
index 0000000..e3ac20b
--- /dev/null
+++ b/lib/isn/base.ex
@@ -0,0 +1,20 @@
+defmodule Isn.Base do
+  defmacro __using__(type) do
+    quote bind_quoted: [type: type] do
+      # @behaviour Ecto.Type
+      #
+      @moduledoc """
+      Definition for the #{@type} module.
+      """
+
+      def type,
+        do: type
+
+      defdelegate blank?, to: Ecto.Type
+
+      def cast(isn), do: {:ok, to_string(isn)}
+      def load(isn), do: {:ok, to_string(isn)}
+      def dump(isn), do: {:ok, to_string(isn)}
+    end
+  end
+end
diff --git a/lib/isn/extension.ex b/lib/isn/extension.ex
new file mode 100644
index 0000000..bb522ea
--- /dev/null
+++ b/lib/isn/extension.ex
@@ -0,0 +1,21 @@
+defmodule Isn.Extension do
+  alias Postgrex.TypeInfo
+
+  @behaviour Postgrex.Extension
+  @isn ~w(ean13 isbn13 ismn13 issn13 isbn ismn issn upc)
+
+  def init(parameters, _opts),
+    do: parameters
+
+  def matching(_library),
+    do: Enum.reduce(@isn, [], fn(t, ack) -> ack ++ [type: t] end)
+
+  def format(_),
+    do: :string
+
+  def encode(%TypeInfo{type: type}, binary, _types, _opts) when type in @isn,
+    do: binary
+
+  def decode(%TypeInfo{type: type}, binary, _types, _opts) when type in @isn,
+    do: binary
+end
diff --git a/lib/isn/isbn13.ex b/lib/isn/isbn13.ex
new file mode 100644
index 0000000..e860c40
--- /dev/null
+++ b/lib/isn/isbn13.ex
@@ -0,0 +1,3 @@
+defmodule Isn.ISBN13 do
+  use Isn.Base, :isbn13
+end
diff --git a/mix.exs b/mix.exs
new file mode 100644
index 0000000..68de93f
--- /dev/null
+++ b/mix.exs
@@ -0,0 +1,45 @@
+defmodule Isn.Mixfile do
+  use Mix.Project
+
+  @version "0.0.1"
+
+  def project do
+    [app: :isn,
+     version: @version,
+     elixir: "~> 1.0",
+     deps: deps,
+     test_paths: ["test"],
+     # Hex
+     description: description,
+     package: package,
+     # Docs
+     name: "Isn",
+     docs: [source_ref: "v#{@version}",
+            source_url: "https://github.com/Frost/isn"]
+   ]
+  end
+
+  # Configuration for the OTP application
+  #
+  # Type `mix help compile.app` for more information
+  def application do
+    []
+  end
+
+  defp description do
+    """
+    Ecto types for the postgreSQL isn extension.
+    """
+  end
+
+  defp package do
+    [contributors: ["Martin Frost"],
+     licences: ["MIT"],
+     links: %{"GitHub" => "https://github.com/Frost/isn"}]
+  end
+
+  defp deps do
+    [{:postgrex, "~> 0.8.1"},
+     {:ecto, "~> 0.11.0"}]
+  end
+end
diff --git a/mix.lock b/mix.lock
new file mode 100644
index 0000000..230a3e8
--- /dev/null
+++ b/mix.lock
@@ -0,0 +1,4 @@
+%{"decimal": {:hex, :decimal, "1.1.0"},
+  "ecto": {:hex, :ecto, "0.11.0"},
+  "poolboy": {:hex, :poolboy, "1.5.1"},
+  "postgrex": {:hex, :postgrex, "0.8.1"}}
diff --git a/test/isn_test.exs b/test/isn_test.exs
new file mode 100644
index 0000000..ad58314
--- /dev/null
+++ b/test/isn_test.exs
@@ -0,0 +1,8 @@
+defmodule IsnTest do
+  use ExUnit.Case
+  doctest Isn
+
+  test "the truth" do
+    assert 1 + 1 == 2
+  end
+end
diff --git a/test/test_helper.exs b/test/test_helper.exs
new file mode 100644
index 0000000..869559e
--- /dev/null
+++ b/test/test_helper.exs
@@ -0,0 +1 @@
+ExUnit.start()