X-Git-Url: https://projects.mako.cc/source/selectricity-live/blobdiff_plain/814ebbe864806750e95c3df954a47f4b0007c5e4..25862916f9c97687bc1b30299fd9d544b0ba62ac:/app/controllers/graph_controller.rb diff --git a/app/controllers/graph_controller.rb b/app/controllers/graph_controller.rb index e7668ff..1bde09e 100644 --- a/app/controllers/graph_controller.rb +++ b/app/controllers/graph_controller.rb @@ -1,24 +1,64 @@ require 'date' -class GraphController < ApplicationController +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 +66,90 @@ 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) - - line.data("#{@election.name}", data ) - line.labels = labels - - 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::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 quickvote_bar + + def borda_bar @election = Election.find(params[:id]) + @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, + :data => data, + :interval_labels => labels, + :title => "Points Per Candidate", + :y_axis_label => "Points", + :x_axis_label => "Candidate") + send_data(*graph.output) 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 + + #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 sorted_data, rank_labels + end # generate the data and labels for each graph def get_votes_per_day_data(election) @@ -89,7 +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! @@ -127,14 +209,15 @@ 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| + next unless vote.time buckets.keys.sort.each do |inter| if vote.time < inter buckets[inter] << vote @@ -158,7 +241,7 @@ class GraphController < ApplicationController 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 = "The Date" end @@ -168,14 +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]}