compose html mail

Gemfile

@@ -82,3 +82,7 @@ gem 'rack-mini-profiler'
 # ref. https://github.com/popgiro/action-gmailer
 gem 'mail'
 gem 'action-gmailer', github: 'popgiro/action-gmailer'
+
+# compose html mail
+gem 'nokogiri'
+gem 'premailer'

Gemfile.lock

@@ -41,6 +41,7 @@ GEM
       multi_json (~> 1.3)
       thread_safe (~> 0.1)
       tzinfo (~> 0.3.37)
+    addressable (2.3.5)
     ancestry (2.0.0)
       activerecord (>= 3.0.0)
     arel (4.0.1)
@@ -60,6 +61,8 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.6.3)
+    css_parser (1.3.5)
+      addressable
     daemons (1.1.9)
     debug_inspector (0.0.2)
     devise (3.2.2)
@@ -77,6 +80,7 @@ GEM
       oauth (>= 0.3.6)
     hashie (2.0.5)
     hike (1.2.3)
+    htmlentities (4.3.1)
     httpauth (0.2.0)
     i18n (0.6.9)
     jbuilder (1.5.3)
@@ -89,9 +93,12 @@ GEM
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
     mime-types (1.25.1)
+    mini_portile (0.5.2)
     minitest (4.7.5)
     multi_json (1.8.2)
     multipart-post (1.2.0)
+    nokogiri (1.6.1)
+      mini_portile (~> 0.5.0)
     oauth (0.4.7)
     oauth2 (0.8.1)
       faraday (~> 0.8)
@@ -111,6 +118,9 @@ GEM
     orm_adapter (0.5.0)
     pg (0.17.0)
     polyglot (0.3.3)
+    premailer (1.7.9)
+      css_parser (>= 1.1.9)
+      htmlentities (>= 4.0.0)
     rack (1.5.2)
     rack-mini-profiler (0.1.31)
       rack (>= 1.1.3)
@@ -186,8 +196,10 @@ DEPENDENCIES
   devise
   jbuilder (~> 1.2)
   mail
+  nokogiri
   omniauth-google-oauth2
   pg
+  premailer
   rack-mini-profiler
   rails (~> 4.0.2)
   rails_12factor

app/controllers/posts_controller.rb

@@ -7,6 +7,7 @@ class PostsController < ApplicationController
   before_action :require_login, except: [:index]
 
   include ApplicationHelper
+  include RV::Mailer
 
   # GET /posts
   # GET /posts.json
@@ -55,9 +56,7 @@ class PostsController < ApplicationController
   def mail
     @post = set_post
 
-    subject = @post.title
-    body = @post.body
-    RV::Mailer.compose_mail(subject, body, current_user).deliver
+    compose_mail(@post, current_user).deliver
     redirect_to root_path(id: @post.id)
   end