projects.mako.cc - selectricity/blob - app/models/quick_vote.rb

   1 class QuickVote < Election
   2   after_validation :create_candidates
   3   validates_uniqueness_of :name
   4   attr_accessor :raw_candidates
   5   attr_accessor :reviewed
   6   attr_accessor :plurality_result
   7   attr_accessor :approval_result
   8   attr_accessor :condorcet_result
   9   attr_accessor :ssd_result
  10   attr_accessor :borda_result
  11
  12   def validate
  13     if not @raw_candidates or @raw_candidates.length < 2
  14         errors.add(nil, "You must list at least two candidates.")
  15     end
  16
  17     if name =~ /[^A-Za-z0-9]/
  18       errors.add(:name, "must only include numbers and letters.")
  19     end
  20
  21     if name =~ /^(create|index|confirm|change|results)$/
  22       errors.add(:name, " is a reserved word.")
  23     end
  24   end
  25
  26   def initialize(params={})
  27     super
  28     self.startdate = Time.now
  29     self.enddate =  Time.now + 30.days
  30     self.active = 1
  31     self.anonymous = 1
  32   end
  33
  34   def candidatelist=(candlist)
  35     @raw_candidates = candlist
  36   end
  37
  38   def name
  39     read_attribute( :name ).downcase()
  40   end
  41
  42   def reviewed?
  43     reviewed.to_i == 1
  44   end
  45
  46   def create_candidates
  47     return unless errors.empty?
  48     @raw_candidates.each do |name|
  49       candidate = Candidate.new({:name => name})
  50       self.candidates << candidate
  51     end
  52   end
  53
  54   #Calculate Election Results
  55   def results
  56     # initalize the tallies to empty arrays
  57     preference_tally = Array.new
  58     plurality_tally = Array.new
  59     approval_tally = Array.new
  60
  61     self.voters.each do |voter|
  62       # skip if the voter has not voted or has an unconfirmed vote
  63       next unless voter.voted?
  64
  65       plurality_tally << voter.vote.rankings.sort[0].candidate.id
  66       approval_tally << voter.vote.rankings.sort[0..1].collect \
  67         { |ranking| ranking.candidate.id }
  68       preference_tally << voter.vote.rankings.sort.collect \
  69         { |ranking| ranking.candidate.id }
  70     end
  71     @plurality_result = PluralityVote.new(plurality_tally).result
  72     @approval_result = ApprovalVote.new(approval_tally).result
  73     @condorcet_result = PureCondorcetVote.new(preference_tally).result
  74     @ssd_result = CloneproofSSDVote.new(preference_tally).result
  75     @borda_result = BordaVote.new(preference_tally).result
  76     #@runoff_result = InstantRunoffVote.new(preference_tally).result
  77     #@runoff_results = PluralityVote.new(preference_tally).result
  78
  79   end
  80
  81   ### Convert a shortname or id into a QuickVote
  82   def self.ident_to_quickvote(ident)
  83     return nil unless ident
  84     if ident.match(/^\d+$/)
  85       quickvote = QuickVote.find(ident)
  86     else
  87       quickvote = QuickVote.find_all(["name = ?", ident])[0]
  88     end
  89
  90     return quickvote
  91   end
  92 end