Fix error when getting a quickvote result of nonexistent ident

[selectricity] / app / controllers / graph_controller.rb

diff --git a/app/controllers/graph_controller.rb b/app/controllers/graph_controller.rb
index 825688476485d114f1583cdb6774c6962e40528d..1bde09e1c4dae465b1221c1321e1ae8a5393db81 100644 (file)
--- a/app/controllers/graph_controller.rb
+++ b/app/controllers/graph_controller.rb
@@ -1,19 +1,24 @@
 require 'date'
-class GraphController < ApplicationController
-  
+class GraphController < ApplicationController  
   class GruffGraff
   
     def initialize(options)
       size = "700x400"
       @graph = options[:graph_type].new(size)
 
-      @graph.theme = { :background_colors => ['#73BF26', '#ffffff'] }
+      @graph.theme = { :colors => ['#000000', '#00FFFF', '#FFCC00', '#990033'],
+                       :background_colors => ['#74ce00', '#ffffff'] }
       @graph.font = File.expand_path('/usr/X11R6/lib/X11/fonts/TTF/Vera.ttf',
                                    RAILS_ROOT)
       
       # fill in the data with the optional data name
-      #Check to see if multiple datasets, if so, fill them all!     
-      if options[:data].size > 1 && options[:data].all?  {|i| i.is_a?(Array)}
+      #Check to see if multiple datasets, if so, fill them all!
+      if options[:data].is_a?(Hash) 
+        options[:data].each_pair do |name, array|
+          @graph.data( name, array)
+        end
+      #if each dataset nameless, will have only multiple arrays    
+      elsif options[:data].size > 1 && options[:data].all?  {|i| i.is_a?(Array)}
         options[:data].each do |array|
           @graph.data( options.fetch(:data_name, "Data"), array)
         end
@@ -73,10 +78,8 @@ class GraphController < ApplicationController
 
   def borda_bar
     @election = Election.find(params[:id])
-    pref_tally = make_preference_tally(@election)
-    
-    @borda_result = BordaVote.new(pref_tally).result
-    data, labels = get_borda_points(@borda_result)
+    @election.results unless @election.borda_result
+    data, labels = get_borda_points(@election.borda_result)
     
     graph = GruffGraff.new( :graph_type => Gruff::Bar,
                             :data_name => @election.name,
@@ -87,16 +90,23 @@ class GraphController < ApplicationController
                             :x_axis_label => "Candidate")
     send_data(*graph.output)
   end
- 
+  #Acording to Tufte, small, concomparitive, highly labeled data sets usually
+  # belong in tables. The following is a bar graph...but would it be better
+  #as a table?
   def choices_positions
+    
     @election = Election.find(params[:id])
     pref_tally = make_preference_tally(@election)
     
     fulldata, labels = get_positions_info(@election)
-    labels = @candidates
+    legend = Hash.new
+    
+    @election.candidates.each_with_index do |candidate, index|
+      legend[candidate.name] = fulldata[index]
+    end
+    
     graph = GruffGraff.new( :graph_type => Gruff::Bar,
-                            :data_name => @election.name,
-                            :data => fulldata,
+                            :data => legend,
                             :interval_labels => labels,
                             :title => "Times Voted in Each Position",
                             :y_axis_label => "Number of Times Ranked",
@@ -105,37 +115,40 @@ class GraphController < ApplicationController
   end
   
  private 
- 
   def get_positions_info(election)
     buckets = Hash.new
     buckets2= Hash.new
     rank_labels = Hash.new
-  
+    
     election.candidates.each do |candidate|
       buckets[candidate.id] = []
       buckets2[candidate.id] = []
     end
-     
+    
+    #attach the ranking to the candidate's array to which is belongs
     election.votes.each do |vote|
       vote.rankings.each do |ranking|
         buckets[ranking.candidate_id] << ranking.rank
       end
     end
-       
+    
+    #count how many times each candidate has been ranked at a certain level
     buckets.each_pair do |id, array|
       (1..election.candidates.size).each do |i|
         buckets2[id] << (array.find_all {|rank| rank == i}).size
       end
     end
     
+    #sort by amount of 1st place votes
+    sorted_data = buckets2.values.sort {|a,b| b[0] <=> a[0]}
+    
     election.votes.each do |vote|
       vote.rankings.size.times do |i|
         rank_labels[i] = (i+1).to_s
       end
     end
-   
-    return buckets2.values, rank_labels
     
+    return sorted_data, rank_labels   
   end
    
   # generate the data and labels for each graph
@@ -157,7 +170,8 @@ class GraphController < ApplicationController
     
     # Now I need to create an array with all the times votes were made
     election.votes.each do |vote|
-        voter_days << Date.parse(vote.time.to_s)
+      next unless vote.time
+      voter_days << Date.parse(vote.time.to_s)
     end
     voter_days.sort!
     
@@ -203,6 +217,7 @@ class GraphController < ApplicationController
     # Will build a graph over time, as each successive interval will have more
     # vote objects  
     election.votes.each do |vote|
+      next unless vote.time
       buckets.keys.sort.each do |inter|
         if vote.time < inter
           buckets[inter] << vote
@@ -236,14 +251,12 @@ class GraphController < ApplicationController
   end
   
   def get_borda_points(result)
-    #points holds how mnay points each candidate has received in array form
-    #becasue Gruff::Bar#data takes only an array
     points = Array.new
     labels = Hash.new
 
     #Populate points with an sorted array from election.votes hash
     #biggest to smallest will go from left to right
-    points = result.election.votes.sort do |a, b|
+    points = result.points.sort do |a, b|
       b[1] <=> a[1]
     end.collect {|i| i[1]}