From 1aec81d008ae174a3aa5e53f4c354616baaf3761 Mon Sep 17 00:00:00 2001
From: Akira Matsuda <ronnie@dio.jp>
Date: Tue, 21 Oct 2025 21:35:21 +0900
Subject: [PATCH 1/3] bundle active_decorator

---
 Gemfile      | 2 ++
 Gemfile.lock | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/Gemfile b/Gemfile
index 10deeda..4c116e2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -26,6 +26,8 @@ gem "stimulus-rails"
 
 gem 'tailwindcss-rails'
 
+gem 'active_decorator'
+
 # Use Redis adapter to run Action Cable in production
 # gem "redis", ">= 4.0.1"
 
diff --git a/Gemfile.lock b/Gemfile.lock
index b3f2dea..c4d225a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -44,6 +44,8 @@ GEM
       erubi (~> 1.11)
       rails-dom-testing (~> 2.2)
       rails-html-sanitizer (~> 1.6)
+    active_decorator (1.5.1)
+      activesupport
     activejob (8.0.3)
       activesupport (= 8.0.3)
       globalid (>= 0.3.6)
@@ -347,6 +349,7 @@ PLATFORMS
   x86_64-linux-musl
 
 DEPENDENCIES
+  active_decorator
   aws-sdk-s3 (~> 1)
   bootsnap
   brakeman

From 1e12eb0fafaa8fd36d3acc9ab27b50fec029f4ec Mon Sep 17 00:00:00 2001
From: Akira Matsuda <ronnie@dio.jp>
Date: Tue, 21 Oct 2025 21:36:05 +0900
Subject: [PATCH 2/3] rails g decorator message

---
 app/decorators/message_decorator.rb       |  4 ++++
 test/decorators/message_decorator_test.rb | 13 +++++++++++++
 2 files changed, 17 insertions(+)
 create mode 100644 app/decorators/message_decorator.rb
 create mode 100644 test/decorators/message_decorator_test.rb

diff --git a/app/decorators/message_decorator.rb b/app/decorators/message_decorator.rb
new file mode 100644
index 0000000..aee3864
--- /dev/null
+++ b/app/decorators/message_decorator.rb
@@ -0,0 +1,4 @@
+# frozen_string_literal: true
+
+module MessageDecorator
+end
diff --git a/test/decorators/message_decorator_test.rb b/test/decorators/message_decorator_test.rb
new file mode 100644
index 0000000..fee9e3a
--- /dev/null
+++ b/test/decorators/message_decorator_test.rb
@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+require 'test_helper'
+
+class MessageDecoratorTest < ActiveSupport::TestCase
+  def setup
+    @message = Message.new.extend MessageDecorator
+  end
+
+  # test "the truth" do
+  #   assert true
+  # end
+end

From 13aa433cebba48e7ce5693fd9bc109f163b92ab3 Mon Sep 17 00:00:00 2001
From: Akira Matsuda <ronnie@dio.jp>
Date: Tue, 21 Oct 2025 21:38:51 +0900
Subject: [PATCH 3/3] Mask email address on Message#from

like the original blade did
---
 app/decorators/message_decorator.rb | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/app/decorators/message_decorator.rb b/app/decorators/message_decorator.rb
index aee3864..51f008c 100644
--- a/app/decorators/message_decorator.rb
+++ b/app/decorators/message_decorator.rb
@@ -1,4 +1,7 @@
 # frozen_string_literal: true
 
 module MessageDecorator
+  def from
+    super&.gsub(/@[a-zA-Z.\-]+/, '@...')
+  end
 end