#383 Uploading to Amazon S3 pro

bundle exec sidekiq
rails g migration add_image_processed_to_paintings image_processed:boolean
rake db:migrate

gem 'carrierwave'
gem 'rmagick'
gem 'fog'
gem 'carrierwave_direct'
gem 'sidekiq'

<%= direct_upload_form_for @uploader do |f| %>
  <p><%= f.file_field :image %></p>
  <p><%= f.submit "Upload Image" %></p>
<% end %>

<%= f.hidden_field :key %>

<p>File: <%= @painting.image_name %></p>

<% if painting.image_processed? %>
  <%= link_to image_tag(painting.image_url(:thumb)), painting %>
<% else %>
  <em>Processing...</em>
<% end %>

def index
  @paintings = Painting.all
  @uploader = Painting.new.image
  @uploader.success_action_redirect = new_painting_url
end

def new
  @painting = Painting.new(key: params[:key])
end

class ImageUploader < CarrierWave::Uploader::Base
  include CarrierWaveDirect::Uploader
  
  include CarrierWave::RMagick

  # Include the Sprockets helpers for Rails 3.1+ asset pipeline compatibility:
  include Sprockets::Helpers::RailsHelper
  include Sprockets::Helpers::IsolatedHelper

  include CarrierWave::MimeTypes
  process :set_content_type

  version :thumb do
    process resize_to_fill: [200, 200]
  end
end

class Painting < ActiveRecord::Base
  attr_accessible :image, :name
  mount_uploader :image, ImageUploader
  
  after_save :enqueue_image
  
  def image_name
    File.basename(image.path || image.filename) if image
  end

  def enqueue_image
    ImageWorker.perform_async(id, key) if key.present?
  end

  class ImageWorker
    include Sidekiq::Worker
    
    def perform(id, key)
      painting = Painting.find(id)
      painting.key = key
      painting.remote_image_url = painting.image.direct_fog_url(with_path: true)
      painting.save!
      painting.update_column(:image_processed, true)
    end
  end
end