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

   1 class Vote < ActiveRecord::Base
   2   # relationships to other classes
   3   belongs_to :voter
   4   has_many :rankings
   5   has_one :token
   6
   7   # callbacks
   8   after_update :save_rankings
   9   before_destroy :destroy_rankings
  10
  11   def to_s
  12     votes.join("")
  13   end
  14
  15   def each
  16     votes.each {|vote| yield vote}
  17   end
  18
  19   def votes
  20     unless @votes
  21       if rankings.empty?
  22         @votes = Array.new
  23       else
  24         @votes = rankings.sort.collect { |ranking| ranking.candidate.id }
  25       end
  26     end
  27
  28     @votes
  29   end
  30
  31   def votes=(array)
  32     @votes = array
  33   end
  34
  35   def save_rankings
  36     destroy_rankings
  37     self.votes.each_with_index do |candidate, index|
  38       ranking = Ranking.new
  39       ranking.rank = index
  40       ranking.candidate =  Candidate.find(candidate)
  41       self.rankings << ranking
  42     end
  43   end
  44
  45   def destroy
  46     self.destroy_rankings
  47     super
  48   end
  49
  50   def destroy_rankings
  51     rankings.each { |ranking| ranking.destroy }
  52   end
  53
  54   def confirm!
  55     self.confirmed = 1
  56     self.save
  57
  58     unless self.voter.election.quickvote?
  59       token.destroy and token.reload if token
  60       self.token = Token.new
  61       self.save
  62     end
  63   end
  64
  65   def confirm?
  66     confirmed == 1
  67   end
  68
  69   def votestring=(string="")
  70     candidate_ids = voter.election.candidates.sort.collect \
  71       { |candidate| candidate.id.to_i }
  72
  73     rel_votes = string.split("").collect { |vote| vote.to_i }
  74
  75     # covert relative orders to absolute candidate ids
  76     self.votes = rel_votes.collect { |vote| candidate_ids[ vote - 1 ] }
  77   end
  78
  79 end