Implemented routing filter for foodcoop select.

* Allows now a multi coop installation for one domain!
* SSL, we are coming...
* TODO: Remove all the hardcoded urls, check email-links etc.

lib/foodcoop_filter.rb

@@ -0,0 +1,37 @@
+require 'routing_filter/base'
+
+module RoutingFilter
+  class Foodcoop < Base
+    def around_recognize(path, env, &block)
+      token = extract_token!(path)                                # remove the token from the beginning of the path
+      returning yield do |params|                                 # invoke the given block (calls more filters and finally routing)
+        params[:foodcoop] = token if token                        # set recognized token to the resulting params hash
+      end
+    end
+
+    def around_generate(*args, &block)
+      token = args.extract_options!.delete(:foodcoop)             # extract the passed :token option
+      token = Foodsoft.env if token.nil?                          # default to Foodsoft.env
+
+      returning yield do |result|
+        if token
+          url = result.is_a?(Array) ? result.first : result
+          prepend_token!(url, token)
+        end
+      end
+    end
+
+    protected
+
+    def extract_token!(path)
+      foodcoop = nil
+      path.sub! %r(^/([a-zA-Z0-9]*)(?=/|$)) do foodcoop = $1; '' end
+      foodcoop
+    end
+
+    def prepend_token!(url, token)
+      url.sub!(%r(^(http.?://[^/]*)?(.*))) { "#{$1}/#{token}#{$2}" }
+    end
+
+  end
+end