Added session management, and wrapped lines.

* Use Camping::Session to store the user variable, instead of passing it
   through the URL.
 * Redirect depending on whether or not a user variable is set.
 * Wrapped lines so that lines do not exceed 80 characters.

anne-survey.rb

@@ -1,5 +1,6 @@
 require "pathname"
 require "markaby"
+require "camping/session"
 
 Markaby::Builder.set(:indent, 2)
 
@@ -7,6 +8,13 @@ Camping.goes :Anne
 
 IMAGE_DIR = Pathname.new(__FILE__).dirname + "images"
 
+module Anne
+
+  include Camping::Session
+  secret "JeMoeder"
+
+end
+
 module Anne::Models
 
   class User < Base
@@ -41,11 +49,14 @@ end
 module Anne::Helpers
 
   def next_image
-    all_images = Pathname.glob(IMAGE_DIR + "*.jpg").map { |img| img.basename.to_s }
-    voted_images = Anne::Models::Vote.find(:all, :conditions => { :user_id => @user_id }).map { |vote| vote.image }
+    all_images = Pathname.glob(IMAGE_DIR + "*.jpg").map { |img|
+      img.basename.to_s }
+    voted_images = Anne::Models::Vote.find(:all, :conditions => {
+      :user_id => @state["user"].id }).map { |vote| vote.image }
     remaining_images = all_images - voted_images
     return nil, 100 if remaining_images.empty?
-    return remaining_images.sort_by { rand }.first, 100 - (remaining_images.length * 100.0 / all_images.length).to_i
+    return remaining_images.sort_by { rand }.first, 100 -
+      (remaining_images.length * 100.0 / all_images.length).to_i
   end
 
 end
@@ -60,50 +71,46 @@ module Anne::Controllers
 
   class Start
     def get
+      return redirect Vote if @state["user"]
       render :start
     end
 
     def post
-      user = User.create( :study => @input.user_study,
-                          :study_year => @input.user_study_year,
-                          :gender => @input.user_gender,
-                          :colorblind => @input.user_colorblind == "ja",
-                          :spaciousness => @input.user_spaciousness )
-      redirect VoteN, user.id
+      @state["user"] = User.create(
+        :study => @input.user_study,
+        :study_year => @input.user_study_year,
+        :gender => @input.user_gender,
+        :colorblind => @input.user_colorblind == "ja",
+        :spaciousness => @input.user_spaciousness)
+      redirect Vote
     end
   end
 
-  class VoteN
-    def get(user_id)
-      @user_id = user_id
-      begin
-        User.find(@user_id)
-        image, progress = next_image
-        return redirect FinishN, @user_id if image.nil?
-        render :vote, image, progress
-      rescue ActiveRecord::RecordNotFound
-        @status = 500
-        "Unknown user id #@user_id"
-      end
+  class Vote
+    def get
+      return redirect Index if not @state["user"]
+      image, progress = next_image
+      return redirect Finish if image.nil?
+      render :vote, image, progress
     end
 
-    def post(user_id)
+    def post
       choice = if @input.left then "left"
                elsif @input.right then "right"
                else "either"
                end
-      vote = Vote.create( :user_id => user_id,
-                          :image => @input.image,
-                          :choice => choice )
-      redirect VoteN, user_id
+      vote = Anne::Models::Vote.create( :user_id => @state["user"].id,
+                                        :image => @input.image,
+                                        :choice => choice )
+      redirect Vote
     end
   end
 
   class ImageX
     def get(file)
       unless file =~ /\.\./ 
-        headers["Content-Type"] = 'image/jpeg'
-        headers['X-Sendfile'] = (IMAGE_DIR + file).to_s
+        headers["Content-Type"] = "image/jpeg"
+        headers["X-Sendfile"] = (IMAGE_DIR + file).to_s
       else
         @status = 403
         "You're not allowed to retrieve #{file}!"
@@ -111,10 +118,10 @@ module Anne::Controllers
     end
   end
 
-  class FinishN
-    def get(user_id)
-      @user_id = user_id
-      return redirect(VoteN, @user_id) unless next_image.first.nil?
+  class Finish
+    def get
+      return redirect Index if not @state["user"]
+      return redirect Vote unless next_image.first.nil?
       render :finish
     end
   end
@@ -130,13 +137,13 @@ module Anne::Controllers
 
 end
 
-
 module Anne::Views
 
   def layout
     xhtml_strict do
       head do
         title "Anne's hippe enqueteshizzle"
+        p @state["user"].inspect
         link :rel => "stylesheet", :type => "text/css",
              :media => "screen", :href => "/style.css"
       end
@@ -174,7 +181,8 @@ module Anne::Views
       make_select "Studiejaar", "user_study_year", ["nvt"] + (1998..2010).to_a
       make_select "Geslacht", "user_gender", ["", "man", "vrouw"]
       make_select "Kleurenblind?", "user_colorblind", ["nee", "ja"]
-      make_select "Ruimtelijk ingesteld?", "user_spaciousness", ["neutraal", "ja", "nee"]
+      make_select "Ruimtelijk ingesteld?", "user_spaciousness", ["neutraal",
+        "ja", "nee"]
 
       input :type => "submit", :value => "Start de enquete"
     end
@@ -183,7 +191,7 @@ module Anne::Views
   def vote(image, progress = 0)
     h2 "Welk beeld is ruimtelijker?"
     img :src => R(ImageX, image), :width => "80%"
-    form :action => R(VoteN, @user_id), :method => :post do
+    form :action => R(Vote), :method => :post do
       input :type => "hidden", :name => "image", :value => image
       input :type => "submit", :name => "left",  :value => "Links"
       input :type => "submit", :name => "right", :value => "Rechts"
@@ -196,7 +204,7 @@ module Anne::Views
     p "Nu ga ik een stukje op m'n motor rijden. Doei!"
     p "Maar we hebben nog wat zeer persoonlijke vragen:"
 
-    form :action => R(FinishN, @user_id), :method => :post do
+    form :action => R(Finish), :method => :post do
       p do
         label "E-mailadres", :for => "email"
         input :type => "text", :name => "email"