Fix cloud storage migration task

lib/tasks/cloud_storage.rake

@@ -0,0 +1,97 @@
+namespace :cloudstorage do
+
+  task init: :environment do
+    os_config = (YAML.load_file(Fog.credentials_path))['default']
+    @os = OpenStack::Connection.create(
+        {
+            username: os_config['openstack_username'],
+            api_key: os_config['openstack_api_key'],
+            auth_method: "password",
+            auth_url: "https://auth.cloud.ovh.net/v2.0/",
+            authtenant_name: os_config['openstack_tenant'],
+            service_type: "object-store",
+            region: os_config['openstack_region']
+        }
+    )
+    @cont = @os.container(CarrierWave::Uploader::Base.fog_directory)
+  end
+
+  desc 'Move local attestations on cloud storage'
+  task migrate: :environment do
+    puts 'Starting migration'
+
+    Rake::Task['cloudstorage:init'].invoke
+
+    error_count = 0
+    [Cerfa, PieceJustificative, Procedure].each { |c|
+      c.all.each { |entry|
+        content = (c == Procedure)? entry.logo : entry.content
+        unless content.current_path.nil? || File.exist?(File.dirname(content.current_path) + '/uploaded')
+          secure_token = SecureRandom.uuid
+          filename = "#{entry.class.to_s.underscore}-#{secure_token}.pdf"
+          puts "Uploading #{content.current_path}"
+          begin
+            @cont.create_object(filename, { content_type: "application/pdf"}, File.open(content.current_path))
+            File.open(File.dirname(content.current_path) + '/uploaded', "w+"){ |f| f.write(File.basename(content.current_path)) }
+            entry.update_column(c == Procedure ? :logo : :content, filename)
+          rescue Errno::ENOENT
+            puts "ERROR: #{content.current_path} does not exist!"
+            File.open('upload_errors.report', "a+"){ |f| f.write(content.current_path) }
+            error_count += 1
+          end
+        else
+          puts "Skipping #{content.current_path}"
+        end
+      }
+    }
+
+    puts "There were #{error_count} errors while uploading files. See upload_errors.report file for details."
+    puts 'Enf of migration'
+  end
+
+  desc 'Clear documents in tenant and revert file entries in database'
+  task :revert do
+    Rake::Task['cloudstorage:init'].invoke
+
+    @cont.objects.each { |object|
+      puts "Removing #{object}"
+      @cont.delete_object(object)
+    }
+
+    [Cerfa, PieceJustificative, Procedure].each { |c|
+      c.all.each { |entry|
+        content = entry.content
+        content = entry.logo if c == Procedure
+        unless content.current_path.nil?
+          if File.exist?(File.dirname(content.current_path) + '/uploaded')
+            previous_filename = File.read(File.dirname(content.current_path) + '/uploaded')
+            entry.update_column(c == Procedure ? :logo : :content, filename)
+            puts "restoring #{content.current_path} db data to #{previous_filename}"
+            FileUtils.rm(File.dirname(content.current_path) + '/uploaded')
+          end
+        end
+      }
+    }
+  end
+
+
+  desc 'Clear old documents in tenant'
+  task :clear do
+    Rake::Task['cloudstorage:init'].invoke
+
+    @cont.objects.each { |object|
+      puts "Removing #{object}"
+      @cont.delete_object(object)
+    }
+  end
+
+  task :clear_old_objects do
+    Rake::Task['cloudstorage:init'].invoke
+
+    @cont.objects_detail.each { |object, details|
+      last_modified = DateTime.parse(details[:last_modified])
+      @cont.delete_object(object) unless last_modified.utc >  (Time.now - 2.year).utc
+    }
+  end
+
+end