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[selectricity] / app / controllers / election_controller.rb
1 # Selectricity: Voting Machinery for the Masses
2 # Copyright (C) 2007, 2008 Benjamin Mako Hill <mako@atdot.cc>
3 # Copyright (C) 2007 Massachusetts Institute of Technology
4 #
5 # This program is free software: you can redistribute it and/or modify
6 # it under the terms of the GNU Affero General Public License as
7 # published by the Free Software Foundation, either version 3 of the
8 # License, or (at your option) any later version.
9 #
10 # This program is distributed in the hope that it will be useful, but
11 # WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13 # Affero General Public License for more details.
14 #
15 # You should have received a copy of the GNU Affero General Public
16 # License along with this program.  If not, see
17 # <http://www.gnu.org/licenses/>.
18
19 class ElectionController < ApplicationController
20   require_dependency "raw_voter_list"
21   require_dependency "voter"
22   require_dependency "vote"
23   require_dependency "candidate"
24   layout 'main'
25
26   ## methods for displaying, creating,
27   ## and manipulating election overview data
28   ####################################################################
29
30   def new
31     redirect_to :action => 'general_information'
32   end
33   
34   def general_information
35     @sidebar_content = render_to_string :partial => 'progress',
36                                         :locals => { :page => 'overview' }
37     @election = Election.new
38     render :action => 'general_information'
39   end
40   
41   def create_election
42     @election = Election.new(params[:election])
43     
44     # default options
45     @election.user = session[:user]
46     @election.anonymous = 1
47     @election.startdate = Time.now
48     
49     unless params[:top_bar][:uploaded_data].to_s.empty?
50       token_generator = UniqueTokenGenerator.new( 16 )
51       @election.embed_custom_string = token_generator.token
52       add_theme(@election.embed_custom_string)
53     end
54     
55     if @election.save
56       flash[:notice] = 'Election was successfully created.'
57       redirect_to :action => 'edit_candidates', :id => @election.id
58     else
59       render :action => 'general_information'
60     end
61   end
62   
63   # TODO add filter to verify that the person working on or looking at
64   # something is the owner
65   def edit_general_information
66     @election = Election.find(params[:id])
67   end
68   
69   def update_general_information
70     @election = Election.find(params[:id])
71     
72     unless (params[:top_bar][:uploaded_data].to_s.empty? and params[:default_image][:uploaded_data].to_s.empty? and params[:bg1][:uploaded_data].to_s.empty? and params[:bg2][:uploaded_data].to_s.empty? and params[:bottom_bar][:uploaded_data].to_s.empty?)
73       unless @election.embed_custom_string
74         token_generator = UniqueTokenGenerator.new( 16 )
75         @election.embed_custom_string = token_generator.token
76       end
77       
78       add_theme(@election.embed_custom_string)
79     end
80     
81     if @election.update_attributes(params[:election])
82       flash[:notice] = 'Election was successfully updated.'
83       redirect_to :action => 'show', :id => @election
84     else
85       render :action => 'edit'
86     end
87   end
88   
89   def add_theme(prefix)
90     unless params[:top_bar][:uploaded_data].to_s.empty?
91       top_bar = SkinPicture.new(params[:top_bar])
92       top_bar.filename = prefix + "top_bar." + params[:top_bar][:uploaded_data].content_type[6..-2]
93       top_bar.save
94     end
95     unless params[:default_image][:uploaded_data].to_s.empty?
96       default_image = SkinPicture.new(params[:default_image])
97       default_image.filename = prefix + "default_image." + params[:default_image][:uploaded_data].content_type[6..-2]
98       default_image.save
99     end
100     unless params[:bg1][:uploaded_data].to_s.empty?
101       bg1 = SkinPicture.new(params[:bg1])  
102       bg1.filename = prefix + "bg1." + params[:bg1][:uploaded_data].content_type[6..-2]
103       bg1.save
104     end
105     unless params[:bg2][:uploaded_data].to_s.empty?
106       bg2 = SkinPicture.new(params[:bg2]) 
107       bg2.filename = prefix + "bg2." + params[:bg2][:uploaded_data].content_type[6..-2]
108       bg2.save
109     end
110     unless params[:bottom_bar][:uploaded_data].to_s.empty?
111       bottom_bar = SkinPicture.new(params[:bottom_bar])
112       bottom_bar.filename = prefix + "bottom_bar." + params[:bottom_bar][:uploaded_data].content_type[6..-2]
113       bottom_bar.save
114     end
115         
116   end
117   
118   def show
119     @sidebar_content = render_to_string :partial => 'progress',
120                                         :locals => { :page => 'review' }
121
122     @election = Election.find(params[:id])
123     if @election.type == QuickVote
124       redirect_to(:controller => 'quickvote', :action => 'index', :ident => @election.id)
125     end
126       
127   end
128
129   def start_election
130     @election = Election.find(params[:id])
131     
132     @election.voters.each do |voter|
133       voter.vote = Vote.new
134       email_voter voter unless voter.email.nil?
135     end
136
137     @election.activate!
138     redirect_to :action => 'show', :id => @election.id
139   end
140
141   # methods fod display, adding, deleting, and manipulating candidate
142   # information for elections
143   ####################################################################
144   def edit_candidates
145     @sidebar_content = render_to_string :partial => 'progress',
146                                         :locals => { :page => 'candidates' }
147     @election = Election.find( params[:id] )
148   end
149
150   def add_candidate
151     @election = Election.find(params[:id])
152     @candidate = Candidate.new(params[:candidate])
153     @election.candidates << @candidate
154
155     if @candidate.save
156       # check to see if they've uploaded a picture
157       if params[:picture][:uploaded_data]
158         picture = Picture.new(params[:picture])
159         @candidate.picture = picture if picture.save
160       end
161
162       @candidate = Candidate.new
163       redirect_to :action => 'edit_candidates', :id => @election.id
164     else
165       render :action => 'edit_candidates', :id => @election.id
166     end
167   end
168   
169   def delete_candidate
170     candidate = Candidate.find( params[:id] )
171     candidate.destroy
172   end
173
174   def candidate_picture
175     candidate = Candidate.find( params[:id] )
176     send_data( candidate.picture.data,
177                :filename => candidate.picture.filename,
178                :type => candidate.picture.filetype,
179                :disposition => 'inline' )
180   end
181
182   ## methods for displaying, adding, deleting, and manipulating voters
183   ## for a particular election
184   ####################################################################
185   def new_voters
186     redirect_to :action => 'edit_voters', :id => params[:id]
187   end
188   
189   def edit_voters
190     @sidebar_content = render_to_string :partial => 'progress',
191                                         :locals => { :page => 'voters' }
192
193     @election = Election.find( params[:id] )
194     if params.has_key?( :raw_voter_list )
195       process_incoming_voters( params[:raw_voter_list] )
196     end
197     @raw_voter_list = RawVoterList.new
198   end
199   
200   def delete_voter
201     voter = Voter.find( params[:id] )
202     voter.destroy
203   end
204
205   def toggle_authenticated
206     @election = Election.find(params[:id])
207     if params[:authenticated] == "1"
208       @election.authenticated = true
209     else
210       @election.authenticated = false
211     end
212     @election.save
213   end
214   
215   ## methods for computing and printing results
216   ####################################################################
217   def results
218     @election = Election.find( params[:id] )
219     votes = []
220     
221     @election.voters.each do |voter|
222       if voter.vote and voter.vote.confirmed?
223         votes << voter.vote.rankings.sort.collect {|vote| vote.candidate_id}
224       end
225     end
226     
227     @voteobj = CloneproofSSDVote.new(votes)
228     @resultobj = @voteobj.result
229     @winners = @resultobj.winners
230     
231     @candidates_by_id = {}
232     @election.candidates.each {|cand| @candidates_by_id[cand.id] = cand}
233     
234   end
235   
236   def detailed_results
237    
238     self.results
239
240     @voter_list = []
241     @vote_list = []
242     
243     @election.voters.each do |voter|
244       if voter.vote and voter.vote.confirmed?
245         @voter_list << voter.email
246               @vote_list << voter.vote
247       end
248     end
249
250     @vote_list.sort!
251     @vote_list.sort! { |a,b| a.token <=> b.token }
252   end
253
254   ## private methods
255   ####################################################################
256   private
257
258     def process_incoming_voters(raw_voter_list)
259       incoming_voters = RawVoterList.new( raw_voter_list )
260
261       unless incoming_voters.entries.empty?
262         incoming_voters.each do |new_voter|
263           new_voter.email.strip! # There's a trailing \r on all but the last in
264                                  # the list!
265           if new_voter.valid?
266             # the new voter should be in good shape. save add to the election
267             @election.voters << new_voter
268                   new_voter.save
269           end
270           # TODO: Can we do some kind of AJAX error message for the voter being invalid?
271         end
272         @election.save
273       end
274  
275       # reset the next time to have a the same default value for emailing
276       @raw_voter_list = RawVoterList.new
277       @raw_voter_list.email = incoming_voters.email
278     end
279
280     def email_voter(voter=nil)
281       if voter
282         VoterNotify.deliver_votestart(voter)
283         voter.contacted=1
284         voter.save
285       end
286     end
287
288 end

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