Separate token creation action into Hostas.Token

lib/hostas/token.ex

@@ -2,6 +2,14 @@ defmodule Hostas.Token do
   use Ecto.Schema
   import Ecto.Changeset
 
+  alias Hostas.Token
+  alias Hostas.Repo
+
+  @doc """
+  The number of days a token lasts from the moment of its creation
+  """
+  @duration_days 30
+
   schema "tokens" do
     field :denizen_id, :integer
     field :expires, :utc_datetime
@@ -19,4 +27,20 @@ defmodule Hostas.Token do
     |> cast(attrs, [:denizen_id, :expires])
     |> validate_required([:denizen_id, :expires])
   end
+
+  @doc """
+  Creates a token
+  """
+  def new(denizen_id) do
+    # Create a random token
+    token = Base.encode64(:crypto.strong_rand_bytes(256))
+
+    # Calculate the time of expiry
+    {:ok, time_now} = DateTime.now("Etc/UTC")
+    expiry = DateTime.add(time_now, @duration_days, :day)
+             |> DateTime.truncate(:second)
+
+    # Register the token
+    Repo.insert(changeset(%Token{}, %{denizen_id: denizen_id, token: token, expires: expiry}))
+  end
 end

lib/hostas_web/controllers/auth/token_controller.ex

@@ -23,17 +23,7 @@ defmodule HostasWeb.Auth.TokenController do
         %{id: denizen_id, password: real_password_hash} = denizen
 
         if Bcrypt.verify_pass(given_password, real_password_hash) do
-          # Create a random token
-          token = Base.encode64(:crypto.strong_rand_bytes(256))
-
-          # Calculate when the token should expire
-          {:ok, time_now} = DateTime.now("Etc/UTC")
-          expiry = DateTime.add(time_now, 30, :day)
-                   |> DateTime.truncate(:second)
-
-          # Register the token
-          {:ok, token_struct} = Repo.insert(
-            %Token{denizen_id: denizen_id, token: token, expires: expiry})
+          {:ok, token_struct} = Token.new(denizen_id)
 
           conn
           |> put_status(201)
@@ -47,7 +37,7 @@ defmodule HostasWeb.Auth.TokenController do
     end
   end
 
-  def create(conn, params) do
+  def create(conn, _params) do
     conn
     |> put_status(422)
     |> json(%{"error" => "Missing required parameters"})