adding :ets to keep track of current value

lib/clip/board.ex

@@ -0,0 +1,23 @@
+defmodule Clip.Board do
+
+  alias Clip.Currents
+
+  def init(user) do
+    Phoenix.PubSub.subscribe(Clip.PubSub, user.email)
+    Currents.get(user.email)
+  end
+
+  def paste(user, snippet) do
+    Phoenix.PubSub.broadcast(Clip.PubSub, user.email, {:snippet_pasted, %{snippet: snippet}})
+    Currents.set(user.email, snippet)
+  end
+
+  def normalize(pnumber, local_pref \\ "0351", country_pref \\ "0049") do
+    pnumber
+    |> String.replace(~r/^\s*\+/, "00")
+    |> String.replace(~r/\D/, "")
+    |> String.replace(~r/^00+/, "00")
+    |> String.replace(~r/^(?=[1-9])/, local_pref)
+    |> String.replace(~r/^0(?=[1-9])/, country_pref)
+  end
+end