How to Transform Emails in Hanami to include inline the styles defined in an external css file?

Question

If I use roadie/premailer to transform my emails in Hanami, then where should I place the transformation code in Hanami?

Thx

score 0 · Answer 1 · answered Sep 10 '18 at 09:24

0

this is a more general question about email CSS inlining. You can check this gem: https://github.com/premailer/premailer

answered Sep 10 '18 at 09:24

Luca Guidi

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I've used that gem in my projects :) The question was, where to put the transformation code in Hanami if I use premailer/roadie – Boti Sep 10 '18 at 13:58
Did you try to alter the `mail` object via `prepare`? It's a hook that is executed before to deliver the email. See https://github.com/hanami/mailer#attachments – Luca Guidi Sep 11 '18 at 15:26

score 0 · Accepted Answer · answered Nov 30 '18 at 18:40

Here is the code which works:

In the gemfile:

gem 'roadie', '~> 3.4'

And assuming that we put the style in the: lib/app/mailers/assets/stylesheets/mail.css the prepare method of the email:

html_part = mail.html_part
old_html = html_part.body.decoded

document = Roadie::Document.new old_html
document.add_css File.read( File.join(Hanami.root, "lib", "app", "mailers", "assets", "stylesheets", "mail.css"))
new_html = document.transform

html_part.body = new_html

How to Transform Emails in Hanami to include inline the styles defined in an external css file?

2 Answers2