Supermail is a slightly more intuitive way of organizing Emails in a Rails application.

Install the gem and add to the application's Gemfile by executing:

bundle add supermail

Then install it in Rails.

rails generate supermail:install

This creates the app/emails/application_email.rb file that you can customize as the base for all emails.

class ApplicationEmail < Supermail::Email
  def from = "Supermail <noreply@supermail.com>"

  class HTML
    def after_template
      p { "Best, The Supermail Team" }
    end
  end

  class Text
    def after_template = <<~_
      Best,
      The Supermail Team"
    _
  end
end

To generate a new email, run the following command:

rails generate supermail:email User::Welcome

This will create a new email class in app/mailers/user/welcome.rb.

# ./app/email/user/welcome.rb
class User::Welcome < ApplicationEmail
  def initialize(user:)
    @user = user
  end

  def subject = "Welcome to Supermail!"

  class HTML
    def view_template
      h1 { "Welcome, #{@user.name}!" }
      p { "We're excited to have you on board." }
    end
  end

  class Text
    def view_template = <<~_
      Welcome, #{@user.name}!

      We're excited to have you on board.
    _
  end
end

Then, to send the email.

User::Welcome.new(user: User.first).deliver_now

If you want to tweak the message on the fly, you can modify the message, then deliver it.

User::Welcome.new(user: User.first).message.tap do
  it.to << "another@example.com"
end.deliver_now

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/rubymonolith/supermail.