allow foodcoops to add custom css

app/controllers/styles_controller.rb

@@ -0,0 +1,18 @@
+# Foodcoop-specific styling
+class StylesController < ApplicationController
+  skip_before_filter :authenticate
+
+  # renders foodcoop css, or 404 if not configured
+  #
+  # When requested with the parameter +md5+, the result is returned
+  # with an expiry time of a week, to leverage caching.
+  def foodcoop
+    css = FoodsoftConfig[:custom_css]
+    if css.blank?
+      render text: nil, content_type: 'text/css', status: 404
+    else
+      expires_in 1.week, public:true if params[:md5].present?
+      render text: css, content_type: 'text/css'
+    end
+  end
+end

app/helpers/application_helper.rb

@@ -218,5 +218,18 @@ module ApplicationHelper
       text_truncated
     end
   end
+
+  # @return [String] path to foodcoop CSS style (with MD5 parameter for caching)
+  def foodcoop_css_path(options={})
+    super(options.merge({md5: Digest::MD5.hexdigest(FoodsoftConfig[:custom_css])}))
+  end
+
+  # @return [String] stylesheet tag for foodcoop CSS style (+custom_css+ foodcoop config)
+  # @see #foodcoop_css_path
+  def foodcoop_css_tag(options={})
+    unless FoodsoftConfig[:custom_css].blank?
+      stylesheet_link_tag foodcoop_css_path, media: 'all'
+    end
+  end
   
 end

app/views/layouts/_header.html.haml

@@ -10,6 +10,7 @@
     //%link(href="images/favicon.ico" rel="shortcut icon")
     
     = yield(:head)
+    = foodcoop_css_tag
 
   %body
     = yield

config/app_config.yml.SAMPLE

@@ -87,6 +87,9 @@ default: &defaults
   # Page footer (html allowed). Default is a Foodsoft footer. Set to `blank` for no footer.
   #page_footer: <a href="http://www.foodcoop.test/">FC Test</a> is supported by <a href="http://www.hoster.test/">Hoster</a>.
 
+  # Custom css for the foodcoop
+  #custom_css: 'body { background-color: #fcffba; }'
+
   # email address to be used as sender
   email_sender: foodsoft@foodcoop.test
 

config/routes.rb

@@ -24,6 +24,8 @@ Foodsoft::Application.routes.draw do
     match '/login/accept_invitation/:token' => 'login#accept_invitation', as: :accept_invitation, via: [:get, :post]
     resources :sessions, :only => [:new, :create, :destroy]
 
+    get '/foodcoop.css' => 'styles#foodcoop', :as => 'foodcoop_css'
+
     ########### User specific
 
     get   '/home/profile', :as => 'my_profile'