1namespace :errors do
  
2  desc "Precompile error pages into /public"
  
3  task :precompile => :environment do
  
4    require 'base64'
  
5
  
6    controller_class = Class.new(ActionController::Base) do
  
7      def url_options
  
8        Site.constraints_for_public
  
 9      end
  
10    end
  
11
  
12    context_class = Class.new(ActionView::Base) do
  
13      include Rails.application.routes.url_helpers
  
14
  
15      def data_uri(path)
  
16        "data:image/png;base64,#{Base64.strict_encode64(asset_data(path))}"
  
17      end
  
18
  
19      def asset_data(path)
  
20        File.read(Rails.root.join('app', 'assets', 'images', path))
  
21      end
  
22
  
23      def home_page?
  
24        false
  
25      end
  
26    end
  
27
  
28    %w[400 403 404 406 422 500 503].each do |status|
  
29      context = context_class.new('app/views', { status: status }, controller_class.new)
  
30      File.open(Rails.public_path.join("#{status}.html"), 'wb') do |f|
  
31        f.write context.render(template: "errors/#{status}", layout: 'errors/layout')
  
32      end
  
33    end
  
34
  
35    context = context_class.new('app/views', {}, controller_class.new)
  
36    File.open(Rails.public_path.join("error.css"), 'wb') do |f|
  
37      f.write context.render(template: "errors/error", layout: false)
  
38    end
  
39  end
  
40end
  
41
  
42task 'assets:precompile' => 'errors:precompile'