Edit Emails with Comfortable Mexican Sofa

Comfortable mexican sofa provides editable snippets on a per-site basis (sites can be mirrored, e.g. per locale). REP comes with CMS integration.

Set up

Add this to an initializer:

require 'rails_email_preview/integrations/comfortable_mexica_sofa'

This makes cms_email_subject and cms_email_snippet methods available to your mailers; when rendered in preview, this will add an Edit link to the content pointing to a customized snippet edit page.

Usage

Use subject and body from the automatically associated CMS snippet:

In the mailer, use cms_email_subject for an editable subject (e.g. in account_mailer.rb):

def confirmation_email(user_id)
  # you can provide values to be interpolated with %{}, e.g. "Hello %{user}"
  mail subject: cms_email_subject(user: find_user(user_id).name)
end

In the view, use cms_email_snippet for editable content (e.g. in confirmation_email.html.slim):

= cms_email_snippet 

Helper methods

You can define helper methods in helpers, and use them in the CMS content.

# app/helpers/emails_cms_helper.rb
module EmailsCmsHelper
  def greeting
    t('email.greeting', name: @user.name)
  end
end

class MyMailer ...
  helper :emails_cms

Use like so:

{{ cms:helper:greeting }}
You have one new message

Markdown

Add a filter around cms_email_snippet to render in Markdown using kramdown:

def cms_email_snippet(*args)
  Kramdown::Document.new(super).to_html.html_safe
end

Styles

You can customize the link's style via config.edit_link_style CSS string.

Rich text / markup editor

While CMS does not provide a configuration option for changing the editor from default CodeMirror html source editor, you can still override the file like with any Rails engine:

mkdir -p app/views/cms_admin/snippets
cp $(bundle show comfortable_mexican_sofa)/app/views/cms_admin/snippets/_form.html.haml app/views/cms_admin/snippets/_form.html.haml

Now find the line with = form.text_area :content and replace it with:

= form.text_area :content, data: {rich_text: true}

Or, for a CodeMirror editor other than html set the appropriate data-cm_mode attribute. See full list of modes on codemirror.net. E.g for a Markdown editor:

= form.text_area :content, data: {cm_mode: 'text/x-markdown'}

You need to have gem 'haml' in your Gemfile or reformat the view to your templating language of choice.

NB: If customized like this, to receive any updates for _form.html.haml from upstream you will need to repeat the procedure each time.

Customize snippet identifier

By default, a new snippet named "email-#{mailer_class_name}-#{mailer_action}" (e.g. "email-account_mailer-confirmation_email") is created. If you want to customize it, you can provide the identifier as an argument (without the 'email-' prefix):

# confirmation_email.html.slim
# follow this format: mailer_class-mailer_action
= cms_email_snippet("active_user-monthly_update")

Namespace the REP routes

You may want to access the preview page at /admins path. If you use namespace to wrap the Engine route, it will cause problem, because there are some url generation inside the gem does not take care namespace. You should only change the routes, "at" value.

# main app routes.rb
mount RailsEmailPreview::Engine, at: 'admins/emails'