feat(messages): render markdown in message body

uses redcarpet gem to render markdown to html. Also a html email template
is added.

Gemfile

@@ -75,6 +75,7 @@ gem 'foodsoft_polls', path: 'plugins/polls'
 # gem 'foodsoft_printer', path: 'plugins/printer'
 # gem 'foodsoft_uservoice', path: 'plugins/uservoice'
 
+
 group :development do
   gem 'sqlite3', '~> 1.3.6'
   gem 'mailcatcher'
@@ -126,3 +127,5 @@ group :test do
   gem 'rswag-specs'
   gem 'hashie', '~> 3.4.6', require: false # https://github.com/westfieldlabs/apivore/issues/114
 end
+
+gem "redcarpet", "~> 3.6"

Gemfile.lock

@@ -413,6 +413,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
+    redcarpet (3.6.0)
     redis (5.0.5)
       redis-client (>= 0.9.0)
     redis-client (0.11.2)
@@ -652,6 +653,7 @@ DEPENDENCIES
   rails_tokeninput
   ransack
   recurring_select!
+  redcarpet (~> 3.6)
   resque
   roo
   roo-xls
@@ -686,4 +688,4 @@ DEPENDENCIES
   whenever
 
 BUNDLED WITH
-   2.4.3
+   2.4.5

plugins/messages/app/models/message.rb

@@ -132,6 +132,11 @@ class Message < ApplicationRecord
     user.role_admin?
   end
 
+  def render_markdown
+    markdown = Redcarpet::Markdown.new(Redcarpet::Render::HTML, autolink: true, tables: true, strikethrough: true, footnotes: true)
+    return markdown.render(body)
+  end
+
   private
 
   def create_salt

plugins/messages/app/views/messages/show.haml

@@ -33,7 +33,7 @@
         - if @message.can_toggle_private?(current_user)
           = link_to t('.change_visibility'), toggle_private_message_path(@message), method: :post, class: 'btn btn-mini'
   %hr/
-  %p= simple_format(h(@message.body))
+  = raw @message.render_markdown
   %hr/
   %p
     = link_to t('.reply'), new_message_path(:message => {:reply_to => @message.id}), class: 'btn'

plugins/messages/app/views/messages_mailer/foodsoft_message.html.haml

@@ -0,0 +1,6 @@
+= raw @message.render_markdown
+%hr/
+%pre
+  - if @message.group
+    = raw t '.footer_group', group: @message.group.name
+  = raw t '.footer', reply_url: new_message_url('message[reply_to]' => @message.id), msg_url: message_url(@message), profile_url: my_profile_url