From ca2c6cdb83fb722be7dbca603bd3739f93dc3365 Mon Sep 17 00:00:00 2001
From: Eric Saxby <sax@livinginthepast.org>
Date: Fri, 31 May 2024 11:34:13 -0700
Subject: [PATCH] Email addresses with different cases are considered equal

---
 CHANGELOG.md             | 1 +
 lib/ecto_email.ex        | 1 +
 test/ecto_email_test.exs | 4 ++++
 3 files changed, 6 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2f9d96f..1fdc4bf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 ## Change log
 
+- Email addresses with different cases are considered equal.
 - **Breaking change:** Use `EctoEmail` instead of `Ecto.Email`.
 
 ## 1.0.0
diff --git a/lib/ecto_email.ex b/lib/ecto_email.ex
index e5ec13e..4f4b5cd 100644
--- a/lib/ecto_email.ex
+++ b/lib/ecto_email.ex
@@ -115,6 +115,7 @@ defmodule EctoEmail do
   """
   @impl Ecto.Type
   def equal?(address, address) when is_binary(address), do: true
+  def equal?(left, right) when is_binary(left) and is_binary(right), do: String.downcase(left) == String.downcase(right)
   def equal?(_, _), do: false
 
   @doc "Callback implementation for `c:Ecto.Type.load/1`"
diff --git a/test/ecto_email_test.exs b/test/ecto_email_test.exs
index d288091..a2eca8b 100644
--- a/test/ecto_email_test.exs
+++ b/test/ecto_email_test.exs
@@ -83,6 +83,10 @@ defmodule EctoEmailTest do
       assert "address@example.com" |> EctoEmail.equal?("address@example.com")
     end
 
+    test "is true when the addresses have the same content but different case" do
+      assert "AddreSS@example.COM" |> EctoEmail.equal?("address@example.com")
+    end
+
     test "is false when the addresses are the same" do
       refute "address@example.com" |> EctoEmail.equal?("address2@example.com")
     end