Both html & plain text emails are sent from markdown templates

app/helpers/mailer_helper.rb

@@ -0,0 +1,6 @@
+module MailerHelper
+
+  def md_link_to(name, path)
+    "[#{name}](#{path})"
+  end
+end

app/mailers/application_mailer.rb

@@ -0,0 +1,11 @@
+class ApplicationMailer < ActionMailer::Base
+  helper MailerHelper
+
+  def mail_markdown(options)
+    mail options do |format|
+      markdown_string = render_to_string(action_name, formats: :md)
+      format.text { render text: markdown_string}
+      format.html { render text: Redcarpet::Markdown.new(Redcarpet::Render::HTML).render(markdown_string)}
+    end
+  end
+end

app/mailers/comment_notification_mailer.rb

@@ -1,4 +1,4 @@
-class CommentNotificationMailer < ActionMailer::Base
+class CommentNotificationMailer < ApplicationMailer
   def email_notification(comment)
     @comment = comment
 
@@ -10,7 +10,7 @@ def email_notification(comment)
     end.compact
 
     if bcc.any?
-      mail(bcc: bcc,
+      mail_markdown(bcc: bcc,
            from: @comment.proposal.event.contact_email,
            subject: "A comment has been posted")
     end

app/mailers/invitation_mailer.rb

@@ -1,10 +1,10 @@
-class InvitationMailer < ActionMailer::Base
+class InvitationMailer < ApplicationMailer
 
   def speaker(invitation, speaker)
     @invitation = invitation
     @proposal   = invitation.proposal
     @speaker    = speaker
 
-    mail(to: @invitation.email, from: @proposal.event.contact_email, subject: "You've been invited to join the \"#{@proposal.title}\" proposal for #{@proposal.event}")
+    mail_markdown(to: @invitation.email, from: @proposal.event.contact_email, subject: "You've been invited to join the \"#{@proposal.title}\" proposal for #{@proposal.event}")
   end
 end

app/mailers/participant_invitation_mailer.rb

@@ -1,10 +1,12 @@
-class ParticipantInvitationMailer < ActionMailer::Base
+class ParticipantInvitationMailer < ApplicationMailer
+
   def create(participant_invitation)
     @participant_invitation = participant_invitation
     @event = participant_invitation.event
 
-    mail to: participant_invitation.email,
-         from: @event.contact_email,
-      subject: "You've been invited to participate in a CFP"
+    mail_markdown to: participant_invitation.email,
+                  from: @event.contact_email,
+                  subject: "You've been invited to participate in a CFP"
   end
 end
+

app/mailers/proposal_mailer.rb

@@ -1,4 +1,4 @@
-class ProposalMailer < ActionMailer::Base
+class ProposalMailer < ApplicationMailer
   def comment_notification(proposal, comment)
     @proposal = proposal
     @comment = comment
@@ -8,7 +8,7 @@ def comment_notification(proposal, comment)
     end
 
     if bcc.any?
-      mail(bcc: bcc,
+      mail_markdown(bcc: bcc,
            from: @proposal.event.contact_email,
           subject: "You've received a comment on your proposal '#{@proposal.title}'")
     end

app/views/comment_notification_mailer/email_notification.md.erb

@@ -0,0 +1,6 @@
+Hello!
+<%= @comment.person.name %> has left a comment on the proposal '<%= @comment.proposal.title %>' for <%= @comment.proposal.event.name %>:
+
+> <%= simple_format(@comment.body) %>
+
+<%= md_link_to 'View the proposal', proposal_url(slug: @comment.proposal.event.slug, uuid: @comment.proposal) %>

app/views/invitation_mailer/speaker.md.erb

@@ -0,0 +1,6 @@
+Hello!
+
+<%= @speaker.name %>  <%= @speaker.email %> has invited you as a speaker on the proposal <%= @proposal.title %>  for <%= @proposal.event %>.
+
+You can accept or refuse this invitation by visiting <% md_link_to 'the proposal page', invitation_url(invitation_slug: @invitation.slug) %>.
+

app/views/participant_invitation_mailer/create.md.erb

@@ -0,0 +1,17 @@
+Hi there!
+
+You've been invited to participate in a Call for Proposals for the event
+<%= @participant_invitation.event %> as the role <%= @participant_invitation.role %>.
+
+<%= md_link_to 'Click here to accept.',
+accept_participant_invitation_url(@participant_invitation.slug,
+@participant_invitation.token) %>
+You'll be prompted to create an account if you don't already have one.
+
+<%= md_link_to 'Click here to decline.',
+refuse_participant_invitation_url(@participant_invitation.slug,
+@participant_invitation.token) %>
+
+You can view the event <%= md_link_to 'here', event_url(@event.slug) %>.
+
+The <%= @event.name %> Program Committee

app/views/proposal_mailer/comment_notification.md.erb

@@ -0,0 +1,7 @@
+<%= @comment.person.name %> has left a comment on your proposal <%= @proposal.title %> for <%= @proposal.event.name %>:
+
+> <%= simple_format(@comment.body) %>
+
+<%= md_link_to 'View your proposal', proposal_url(slug: @proposal.event.slug, uuid: @proposal) %>
+
+

test/mailers/previews/invitation_preview.rb

@@ -0,0 +1,5 @@
+class InvitationPreview < ActionMailer::Preview
+  def create
+    ParticipantInvitationMailer.create(ParticipantInvitation.first)
+  end
+end