From 3709cd265a7190ca844e6be985c3827b1ab7f86d Mon Sep 17 00:00:00 2001
From: Joao P Dubas <joao.dubas@gmail.com>
Date: Tue, 22 Jun 2021 23:57:10 +0000
Subject: [PATCH] [day-02] add context to create/get a user

Create context module to create and fetch a user.
---
 lib/wabanex/users/create.ex |  9 +++++++++
 lib/wabanex/users/get.ex    | 20 ++++++++++++++++++++
 2 files changed, 29 insertions(+)
 create mode 100644 lib/wabanex/users/create.ex
 create mode 100644 lib/wabanex/users/get.ex

diff --git a/lib/wabanex/users/create.ex b/lib/wabanex/users/create.ex
new file mode 100644
index 0000000..240728f
--- /dev/null
+++ b/lib/wabanex/users/create.ex
@@ -0,0 +1,9 @@
+defmodule Wabanex.Users.Create do
+  alias Wabanex.{Repo, User}
+
+  def call(params) do
+    params
+    |> User.changeset()
+    |> Repo.insert()
+  end
+end
diff --git a/lib/wabanex/users/get.ex b/lib/wabanex/users/get.ex
new file mode 100644
index 0000000..fc6640a
--- /dev/null
+++ b/lib/wabanex/users/get.ex
@@ -0,0 +1,20 @@
+defmodule Wabanex.Users.Get do
+  alias Wabanex.{Repo, User}
+
+  def call(id) do
+    id
+    |> Ecto.UUID.cast()
+    |> handle_result()
+  end
+
+  defp handle_result(:error), do: {:error, "Invalid id format"}
+
+  defp handle_result({:ok, uuid}) do
+    User
+    |> Repo.get(uuid)
+    |> case do
+      nil -> {:error, "User not found"}
+      user -> {:ok, user}
+    end
+  end
+end