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