add cdn purge on logo uploads

Author: ptgms

Gemfile

@@ -25,6 +25,7 @@ gem 'elasticsearch-persistence'
 gem 'elasticsearch-rails'
 gem 'faraday', '~> 1.10', '>= 1.10.5'
 gem 'figaro'
+gem 'fastly'
 gem 'fog-aws'
 gem 'font_awesome5_rails'
 gem 'formtastic'

app/controllers/services_controller.rb

@@ -116,6 +116,7 @@ def update
       logo = params[:service][:logo]
       if logo
         if uploader.store!(logo)
+          purge_logo_cdn(@service.id)
           flash[:notice] = 'Uploaded logo!'
           redirect_to service_path(@service)
         else
@@ -152,13 +153,21 @@ def destroy
   def handle_logo(uploader, logo, service)
     puts 'Uploaded image'
     if uploader.store!(logo)
+      purge_logo_cdn(service.id)
       flash[:notice] = 'Created service with logo!'
     else
       flash[:alert] = 'Uploading the logo failed!'
     end
     redirect_to service_path(service)
   end
 
+  def purge_logo_cdn(service_id)
+    return unless ENV['FASTLY_API_KEY'].present? && ENV['S3_CDN'].present?
+
+    fastly = Fastly.new(api_key: ENV['FASTLY_API_KEY'])
+    fastly.purge("#{ENV['S3_CDN']}/#{service_id}.png")
+  end
+
   def build_quote(point)
     document = Document.find(params[:document_id])
     point.document = document