X-Git-Url: https://projects.mako.cc/source/selectricity/blobdiff_plain/1660465f3e072cbddc19b19f7f8869affb0694c5..92261fac718494dca6f92bbf193e75821fa336ec:/app/models/election.rb?ds=sidebyside

diff --git a/app/models/election.rb b/app/models/election.rb
index be828d0..9ce89b9 100644
--- a/app/models/election.rb
+++ b/app/models/election.rb
@@ -1,12 +1,176 @@
+# Selectricity: Voting Machinery for the Masses
+# Copyright (C) 2007, 2008 Benjamin Mako Hill <mako@atdot.cc>
+# Copyright (C) 2007 Massachusetts Institute of Technology
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public
+# License along with this program.  If not, see
+# <http://www.gnu.org/licenses/>.
+
 class Election < ActiveRecord::Base
   has_many :candidates
+  has_many :voters
+  has_many :votes
+  belongs_to :user
   validates_presence_of :name, :description
+  
+  #validate that method is one of the listed election types
+  
+  attr_reader :plurality_result
+  attr_reader :approval_result
+  attr_reader :condorcet_result
+  attr_reader :ssd_result
+  attr_reader :borda_result
+  
+  require 'date'
+  
+  def initialize(params={})
+    super
+    self.enddate = read_attribute( :enddate ) || \
+                   Time.now + 30.days - 1.second
+  end
+
+  def other_methods
+    if election_method
+      @other_methods = ELECTION_TYPES.keys.reject {|i| i == election_method}
+    else
+      @other_methods = nil
+    end
+    @other_methods
+  end
+
+  def startdate
+    read_attribute( :startdate ) || Time.now
+  end
+
+  def votes
+    votes = Array.new
+    self.voters.each do |voter|
+      votes << voter.vote
+    end
+    return votes
+  end
 
   def destroy
     self.candidates.each do |candidate|
       candidate.destroy
     end
-    super destroy
+    super
+  end
+
+  def start_blockers
+    reasons = []
+    if self.candidates.length <= 1
+      reasons << "You must have at least two candidates."
+    end
+    
+    if self.voters.length <= 1 and self.authenticated?
+      reasons << "You must have at least two voters."
+    end
+
+    reasons
+  end
+
+  def activate!
+    self.active = 1
+    self.save!
+  end
+  
+  def quickvote?
+    self.class == QuickVote
+  end
+
+  def active?
+    active == 1
+  end 
+
+  def done?
+    active == 2
+  end
+
+  def authenticated?
+    authenticated
+  end
+  
+  def shortdesc
+    shortdesc = description.split(/\n/)[0]
+  end
+
+  def longdesc
+    longdesc = description.split(/\n/)[1..-1].join("")
+    longdesc.length > 0 ? longdesc : nil 
+  end
+  
+  #Calculate results if not in memcache
+  def results
+    # Assignment is intentional
+    if Cache and c = Cache.get("election_results:#{id}:#{self.votes.length}")
+      @plurality_result = c['plurality']
+      @approval_result = c['approval']
+      @condorcet_result = c['condorcet']
+      @ssd_result = c['ssd']
+      @borda_result = c['borda']
+      return c
+    elsif Cache
+      # memcache is available, but missed.
+      results = self.results!
+      Cache.set("election_results:#{id}:#{self.votes.length}", results)
+      return results
+    else
+      return self.results!
+    end
   end
+
+  #Always Calculate Election Results
+  def results!
+    # initalize the tallies to empty arrays
+    preference_tally = Array.new
+    plurality_tally = Array.new
+    approval_tally = Array.new
+
+    self.voters.each do |voter|
+      # skip if the voter has not voted or has an unconfirmed vote
+      next unless voter.voted?
+
+      plurality_tally << voter.vote.rankings.sort[0].candidate.id
+      approval_tally << voter.vote.rankings.sort[0..1].collect \
+        { |ranking| ranking.candidate.id }
+      preference_tally << voter.vote.rankings.sort.collect \
+        { |ranking| ranking.candidate.id }
+    end
+    
+    @plurality_result = PluralityVote.new(plurality_tally).result
+    @approval_result = ApprovalVote.new(approval_tally).result
+    @condorcet_result = PureCondorcetVote.new(preference_tally).result
+    @ssd_result = CloneproofSSDVote.new(preference_tally).result
+    @borda_result = BordaVote.new(preference_tally).result
+    
+    { 'plurality' => @plurality_result,
+      'approval' => @approval_result,
+      'condorcet' => @condorcet_result,
+      'ssd' => @ssd_result,
+      'borda' => @borda_result }
+    end
   
+  def names_by_id
+    names = Hash.new
+    
+    competitors = self.candidates.sort.collect {|candidate| candidate.id}
+    competitors.each do |candidate|
+      names[candidate] = Candidate.find(candidate).name
+    end
+    
+    names
+  end
 end
+
+