X-Git-Url: https://projects.mako.cc/source/selectricity-live/blobdiff_plain/09c67d9323c7d379d4c6de5dc0457b6de16cff14..cf4234876994cb4b7e09cdd116e092424d9f4951:/app/controllers/graph_controller.rb?ds=inline

diff --git a/app/controllers/graph_controller.rb b/app/controllers/graph_controller.rb
index 7b593cc..bbd5cd7 100644
--- a/app/controllers/graph_controller.rb
+++ b/app/controllers/graph_controller.rb
@@ -1,24 +1,65 @@
 require 'date'
 class GraphController < ApplicationController
+  
+  class GruffGraff
+  
+    def initialize(options)
+      size = "700x400"
+      @graph = options[:graph_type].new(size)
+
+      @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].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
+      else #one dimensional array, just pass it in
+      @graph.data( options.fetch(:data_name, "Data"), options[:data] )
+      end
+      
+      # set the labels or create an empty hash
+      @graph.labels = options[:interval_labels] \
+        if options.has_key?(:interval_labels) and \
+           options[:interval_labels].class == Hash
+      @graph.x_axis_label = options[:x_axis_label] \
+        if options.has_key?(:x_axis_label)
+      @graph.y_axis_label = options[:y_axis_label] \
+        if options.has_key?(:y_axis_label)
+      @graph.title = options[:title] if options.has_key?(:title)
+      
+      @graph.minimum_value = 0.0
+
+    end
+
+    def output
+      return([@graph.to_blob, {:disposition => 'inline', :type => 'image/png'}])
+    end
+
+  end
+
   # produce a graph of votes per day during an election
   def votes_per_day
     @election = Election.find(params[:id])
     data, labels = get_votes_per_day_data(@election)
     
-    line = Gruff::Line.new("700x400")
-    line.theme = { :background_colors => ['#73BF26', '#ffffff'] }
-    line.title = "Voters Per Day"
-    line.font = File.expand_path('/usr/X11R6/lib/X11/fonts/TTF/Vera.ttf',
-                                 RAILS_ROOT)
-
-    line.data( "#{@election.name}", data )
-    line.labels = labels
-
-    line.x_axis_label = "Date"
-    line.y_axis_label = "Number of Votes"
-    line.minimum_value = 0.0
-
-    send_data(line.to_blob, :disposition => 'inline', :type => 'image/png')
+    graph = GruffGraff.new( :graph_type => Gruff::Line,
+                            :data_name => @election.name,
+                            :data => data,
+                            :interval_labels => labels,
+                            :title => "Voters Per Day",
+                            :x_axis_label => "Data",
+                            :y_axis_label =>"Number of Votes")
+    send_data(*graph.output)
   end
   
   #will place votes in a fixed number of intervals, and shows votes over time
@@ -26,49 +67,88 @@ class GraphController < ApplicationController
     @election = Election.find(params[:id])
     data, labels, scale = get_votes_per_interval_data(@election)
     
-    line = Gruff::Line.new("700x400")
-    line.theme = { :background_colors => ['#73BF26', '#ffffff'] }
-    line.title = "Voters Over Time"
-    line.font = File.expand_path('/usr/X11R6/lib/X11/fonts/TTF/Vera.ttf',
-                               RAILS_ROOT)
+    graph = GruffGraff.new( :graph_type => Gruff::Line,
+                            :data_name => @election.name,
+                            :data => data,
+                            :interval_labels => labels,
+                            :title => "Voters Over Time",
+                            :x_axis_label => scale,
+                            :y_axis_label => "Number of Votes")
+    send_data(*graph.output)
+  end
+
+  def borda_bar
+    @election = Election.find(params[:id])
+    #pref_tally = make_preference_tally(@election)
     
-    line.data("#{@election.name}", data )
-    line.labels = labels
+    #@borda_result = BordaVote.new(pref_tally).result
+    data, labels = get_borda_points(@election.borda_result)
     
-    line.x_axis_label = scale
-    line.y_axis_label = "Number of Votes"
-    line.minimum_value = 0.0
-                               
-    send_data(line.to_blob, :disposition => 'inline', :type => 'image/png')  
+    graph = GruffGraff.new( :graph_type => Gruff::Bar,
+                            :data_name => @election.name,
+                            :data => data,
+                            :interval_labels => labels,
+                            :title => "Points Per Candidate",
+                            :y_axis_label => "Points",
+                            :x_axis_label => "Candidate")
+    send_data(*graph.output)
   end
- 
-  def quickvote_bar
-    @election = Election.find(params[:id])
-  end
-  
-  def borda_bar
+  #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)
     
-    @borda_result = BordaVote.new(pref_tally).result
-    data, labels = get_borda_points(@borda_result)
-    
-    bar = Gruff::Bar.new("700x400")
-    bar.theme = { :background_colors => ['#73BF26', '#ffffff'] }
-    bar.title = "Points Per Candidate"
-    bar.font = File.expand_path('/usr/X11R6/lib/X11/fonts/TTF/Vera.ttf',
-                               RAILS_ROOT)
-                      
-    bar.data("#{@election.name}", data)
-    bar.labels = labels
-    
-    bar.y_axis_label = "Points"
-    bar.x_axis_label = "Candidate"
-    bar.minimum_value = 0.0
-    send_data(bar.to_blob, :disposition => 'inline', :type => 'image/png')
+    fulldata, labels = get_positions_info(@election)
+    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 => legend,
+                            :interval_labels => labels,
+                            :title => "Times Voted in Each Position",
+                            :y_axis_label => "Number of Times Ranked",
+                            :x_axis_label => "Rank")
+    send_data(*graph.output) 
   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
+     
+    election.votes.each do |vote|
+      vote.rankings.each do |ranking|
+        buckets[ranking.candidate_id] << ranking.rank
+      end
+    end
+       
+    buckets.each_pair do |id, array|
+      (1..election.candidates.size).each do |i|
+        buckets2[id] << (array.find_all {|rank| rank == i}).size
+      end
+    end
+    
+    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
+    
+  end
    
   # generate the data and labels for each graph
   def get_votes_per_day_data(election)
@@ -127,12 +207,12 @@ class GraphController < ApplicationController
     
     # Make a hash, buckets, indexed by time intervals and containing empty arrays
     # The time object must come first in addition! 
-    # i would start at 0, i+1 goes from 0 up till numcols
+    # i would start at 0, i+1 goes from 1 up till numcols
     numcols.times {|i| buckets[starttime + ((i+1)*interval_length)] = []}
      
     # Put votes into bucket according to the time interval to which they belong,
     # referenced by their key
-    # Will build a graph over time, as each successive interval wil lhave more
+    # Will build a graph over time, as each successive interval will have more
     # vote objects  
     election.votes.each do |vote|
       buckets.keys.sort.each do |inter|
@@ -150,17 +230,17 @@ class GraphController < ApplicationController
       labels_hash[0] = starttime.min.to_s
       labels_hash[(numcols/2)-1] = (starttime + (timedelta/2)).min.to_s
       labels_hash[numcols-1] = Time.now.min.to_s
-      interval_type = "Minutes"
+      interval_type = "Minute of the Hour"
     elsif timedelta < 2.days #more than 2 hours means use hours for labels
       labels_hash[0] = starttime.hour.to_s
       labels_hash[(numcols/2)-1] = (starttime + (timedelta/2)).hour.to_s
       labels_hash[numcols-1] = Time.now.hour.to_s
-      interval_type = "Hours"
+      interval_type = "Hour of the Day on 24 hour scale"
     else #more than 2 days means use dates for labels
       labels_hash[0] = (Date.parse(starttime.to_s)).to_s
-      labels_hash[(numcols/2)-1] = (Date.parse(starttime + (timedelta/2))).to_s
+      labels_hash[(numcols/2)-1] = (Date.parse((starttime + (timedelta/2)).to_s)).to_s
       labels_hash[numcols-1] = (Date.today).to_s
-      interval_type = "Days"
+      interval_type = "The Date"
     end
     
     # Make sure to return an array for data and hash for labels
@@ -168,8 +248,6 @@ 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