Add processor to remove blue bar from nav menu

lib/slimmer.rb

@@ -33,6 +33,7 @@ def fetch(*)
 
   module Processors
     autoload :AccountsShower, "slimmer/processors/accounts_shower"
+    autoload :BlueBarRemover, "slimmer/processors/blue_bar_remover"
     autoload :BodyClassCopier, "slimmer/processors/body_class_copier"
     autoload :BodyInserter, "slimmer/processors/body_inserter"
     autoload :ConditionalCommentMover, "slimmer/processors/conditional_comment_mover"

lib/slimmer/headers.rb

@@ -19,13 +19,17 @@ module Headers
       section: "Section",
       skip: "Skip",
       template: "Template",
+      remove_blue_bar: "Remove-Blue-Bar",
       remove_search: "Remove-Search",
       show_accounts: "Show-Accounts",
     }.freeze
 
     # @private
     APPLICATION_NAME_HEADER = "#{HEADER_PREFIX}-#{SLIMMER_HEADER_MAPPING[:application_name]}".freeze
 
+    # @private
+    REMOVE_BLUE_BAR_HEADER = "#{HEADER_PREFIX}-#{SLIMMER_HEADER_MAPPING[:remove_blue_bar]}".freeze
+
     # @private
     FORMAT_HEADER = "#{HEADER_PREFIX}-#{SLIMMER_HEADER_MAPPING[:format]}".freeze
 
@@ -66,6 +70,7 @@ module Headers
     # @option hash [String] format
     # @option hash [String] organisations
     # @option hash [String] page_owner
+    # @option hash [String] remove_blue_bar
     # @option hash [String] remove_search
     # @option hash [String] result_count
     # @option hash [String] search_parameters

lib/slimmer/processors/blue_bar_remover.rb

@@ -0,0 +1,14 @@
+module Slimmer::Processors
+  class BlueBarRemover
+    def initialize(headers)
+      @headers = headers
+    end
+
+    def filter(_src, dest)
+      if @headers.include?(Slimmer::Headers::REMOVE_BLUE_BAR_HEADER)
+        blue_bar = dest.at_css(".gem-c-layout-for-public__blue-bar")
+        blue_bar.remove if blue_bar
+      end
+    end
+  end
+end

lib/slimmer/skin.rb

@@ -118,6 +118,7 @@ def success(source_request, response, body)
         Processors::SearchPathSetter.new(response),
         Processors::SearchRemover.new(response.headers),
         Processors::AccountsShower.new(response.headers),
+        Processors::BlueBarRemover.new(response.headers),
       ]
 
       template_name = response.headers[Headers::TEMPLATE_HEADER] || "gem_layout"