Initial commit

lib/iban_ex/country/gb.ex

@@ -0,0 +1,35 @@
+defmodule IbanEx.Country.GB do
+  @moduledoc """
+  United Kingdom IBAN parsing rules
+  """
+
+  alias IbanEx.Iban
+
+  @behaviour IbanEx.Country.Template
+
+  @size 22
+
+  @rule ~r/^(?<bank_code>[A-Z]{4})(?<branch_code>[0-9]{6})(?<account_number>[0-9]{8})$/i
+
+  @spec size() :: 22
+  def size(), do: @size
+
+  @spec rule() :: Regex.t()
+  def rule(), do: @rule
+
+  @spec to_s(Iban.t()) :: binary()
+  @spec to_s(Iban.t(), binary()) :: binary()
+  def to_s(
+        %Iban{
+          country_code: country_code,
+          check_digits: check_digits,
+          bank_code: bank_code,
+          branch_code: branch_code,
+          account_number: account_number
+        } = _iban,
+        joiner \\ " "
+      ) do
+    [country_code, check_digits, bank_code, branch_code, account_number]
+    |> Enum.join(joiner)
+  end
+end