application_helper.rb in rostra-0.0.4

- old
+ new
@@ -1,4 +1,62 @@
 module Rostra
   module ApplicationHelper
+
+    # Creates a list of tags linking to...TODO: Where should these link?
+    #
+    def tag_list(question)
+      content_tag :div, "Tags: #{question.tags.map { |tag| link_to tag, ''}.join}".html_safe, class: 'tags'
+    end
+
+    # Finds the url to the user's avatar following this logic:
+    #
+    #   1. Calls the method defined in the <tt>Rostra::Config</tt>
+    #   2. Uses the users email address to looks for a gravatar
+    #   3. Renders <tt>app/assets/images/rostra/anonymous_avatar.png</tt>
+    #
+    def avatar_url(user)
+      avatar_method = Rostra::Config.rostra_user_avatar
+
+      if user.respond_to?(avatar_method)
+        user.send(avatar_method)
+      else
+        default_url = "#{main_app.root_url}assets/rostra/anonymous_avatar.png"
+        gravatar_id = Digest::MD5.hexdigest(user.rostra_user_email.downcase)
+        "http://gravatar.com/avatar/#{gravatar_id}.png?s=48&d=#{CGI.escape(default_url)}"
+      end
+    end
+
+    # Method to build links for ajax-y voting arrows.
+    #
+    def link_to_vote(direction, resource)
+      if user_signed_in? && ( (direction == :up && rostra_user.voted_for?(resource)) || (direction == :down && rostra_user.voted_against?(resource)) )
+        selected = 'selected'
+      else
+        selected = ''
+      end
+
+      link_to "Vote #{direction.capitalize}", vote_path(resource, direction), method: :put, remote: true, class: "vote #{direction} #{selected}"
+    end
+
+    # Returns a rostra object's base class name. For example, <tt>@question</tt> is an instance of
+    # Rostra::Question and so:
+    #
+    #   class_name(@question)  # => 'question'
+    #
+    def class_name(resource)
+      resource.class.name.split('::').last.downcase
+    end
+
+    private
+
+    def vote_path(resource, direction)
+      return '#' if !user_signed_in? || can?(:manage, resource)
+
+      if resource.is_a?(Rostra::Question)
+        vote_question_path(resource, vote_direction: direction)
+      else
+        vote_question_answer_path(resource.question, resource, vote_direction: direction)
+      end
+    end
+
   end
 end