From be508ec88a46fa27fb04408d09a2d544ddabf6d5 Mon Sep 17 00:00:00 2001
From: KKlochko <KKlochko@protonmail.com>
Date: Fri, 7 Jul 2023 16:52:52 +0300
Subject: [PATCH] Add a generator of a SafeString.

---
 CHANGELOG.org                                |  2 ++
 lib/link_shortener/generators/safe_string.ex | 15 +++++++++++++++
 2 files changed, 17 insertions(+)
 create mode 100644 lib/link_shortener/generators/safe_string.ex

diff --git a/CHANGELOG.org b/CHANGELOG.org
index 6b522e4..517d2a7 100644
--- a/CHANGELOG.org
+++ b/CHANGELOG.org
@@ -7,4 +7,6 @@
     Updated the Links model to have a unique shorten.
 ** 0.1.2 <2023-07-06 Thu>
     Renamed the Links.get_one_by_name to get_one_by_shorten.
+** 0.2.0 <2023-07-07 Fri>
+    Added a generator of a SafeString.
 
diff --git a/lib/link_shortener/generators/safe_string.ex b/lib/link_shortener/generators/safe_string.ex
new file mode 100644
index 0000000..ca63568
--- /dev/null
+++ b/lib/link_shortener/generators/safe_string.ex
@@ -0,0 +1,15 @@
+defmodule LinkShortener.Generators.SafeString do
+  @moduledoc """
+  This module provides a generator.
+  """
+
+  @doc """
+  Generate a random string with the length.
+  The string can be used as part of a url.
+  """
+  def generate(length) do
+    :crypto.strong_rand_bytes(length)
+    |> Base.url_encode64()
+    |> binary_part(0, length)
+  end
+end