Configure letter opener to read emails via web UI

Gemfile

@@ -35,6 +35,7 @@ end
 group :development do
   gem 'rubocop'
   gem 'web-console'
+  gem 'letter_opener_web'
 end
 
 gem 'chroma'

Gemfile.lock

@@ -88,6 +88,8 @@ GEM
     bootsnap (1.18.4)
       msgpack (~> 1.2)
     builder (3.3.0)
+    childprocess (5.1.0)
+      logger (~> 1.5)
     chroma (0.2.0)
     coderay (1.1.3)
     concurrent-ruby (1.3.4)
@@ -150,6 +152,16 @@ GEM
     jsonapi-serializable (0.3.1)
       jsonapi-renderer (~> 0.2.0)
     language_server-protocol (3.17.0.3)
+    launchy (3.0.1)
+      addressable (~> 2.8)
+      childprocess (~> 5.0)
+    letter_opener (1.10.0)
+      launchy (>= 2.2, < 4)
+    letter_opener_web (3.0.0)
+      actionmailer (>= 6.1)
+      letter_opener (~> 1.9)
+      railties (>= 6.1)
+      rexml
     license_finder (7.2.1)
       bundler
       csv (~> 3.2)
@@ -386,6 +398,7 @@ DEPENDENCIES
   importmap-rails
   jbuilder
   jsonapi-rails
+  letter_opener_web
   license_finder
   money
   pg (~> 1.1)

app/controllers/application_controller.rb

@@ -31,7 +31,7 @@ class ApplicationController < ActionController::Base
 
   def development_swagger?
     Rails.env.test? ||
-    Rails.env.development? && request.headers['referer'].include?('/api-docs/index.html')
+      Rails.env.development? && request.headers['referer']&.include?('/api-docs/index.html')
   end
 
   def set_csrf_cookie

app/controllers/users/confirmations_controller.rb

@@ -5,7 +5,10 @@ class Users::ConfirmationsController < Devise::ConfirmationsController
   def show
     super do |resource|
       if resource.errors.empty?
-        render json: resource, status: :ok
+        respond_to do |format|  
+          format.json { render json: resource, status: :ok }
+          format.any { redirect_to root_path }
+        end
       else
         render json: {
           message: 'Record invalid',

config/environments/development.rb

@@ -40,10 +40,10 @@ Rails.application.configure do
 
   # Don't care if the mailer can't send.
   config.action_mailer.raise_delivery_errors = false
-
   config.action_mailer.perform_caching = false
-
-  config.action_mailer.default_url_options = { host: 'libre-wedding-planner.app.localhost' }
+  config.action_mailer.default_url_options = { host: 'libre-wedding-planner.app.localhost/api' }
+  config.action_mailer.delivery_method = :letter_opener_web
+  config.action_mailer.perform_deliveries = true
 
   # Print deprecation notices to the Rails logger.
   config.active_support.deprecation = :log

config/routes.rb

@@ -1,6 +1,7 @@
 # Copyright (C) 2024 Manuel Bustillo
 
 Rails.application.routes.draw do
+  mount LetterOpenerWeb::Engine, at: "/letter_opener" if Rails.env.development?
   devise_for :users, skip: [:registration, :session, :confirmation]
   devise_scope :user do
     post 'users', to: 'users/registrations#create'
@@ -23,4 +24,6 @@ Rails.application.routes.draw do
   resources :tables_arrangements, only: %i[index show]
 
   get 'up' => 'rails/health#show', as: :rails_health_check
+
+  root to: redirect('/dashboard')
 end

nginx.conf

@@ -7,6 +7,11 @@ server {
         proxy_set_header Host $http_host;
     }
 
+    location /letter_opener/ {
+        proxy_pass http://backend:3000/letter_opener/;
+        proxy_set_header Host $http_host;
+    }
+
     location / {
         proxy_pass http://frontend:3000;
         proxy_set_header Host $http_host;