+# 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/>.
+
require 'action_controller/integration'
class SelectricityService < ActionWebService::Base
web_service_api SelectricityAPI
+
+ ## Casts a quickvote.
+ ## Expects a quickvote name, a voter ID, and a list of candidate ID's respectively.
+ ## Returns a string containing any potential errors that occurred in the process.
def cast_quickvote(election_name, voter_id, vote_list)
election = QuickVote.ident_to_quickvote election_name
if election
+ candidates=election.candidates.collect { |c| c.id }
+ vote_list[0].each do |vote|
+ raise ArgumentError.new("Invalid Candidate ID #{vote}") unless candidates.index(vote)
+ end
+ raise ArgumentError.new("You must rank all candidates") unless candidates.length <= vote_list[0].length
+ raise ArgumentError.new("Please rank each candidate only once") if vote_list[0].uniq!
voter = QuickVoter.new
voter.election = election
voter.ipaddress = "XMLRPC Request"
voter.save!
voter.vote.confirm!
voter.save!
+ else
+ raise ArgumentError.new("Cannot find election #{election_name}")
end
end
+
+ ## Converts QuickVote candidate ID's to names
+ ## Takes in a QuickVote name and a list of candidate ID's, and returns the names of
+ ## each candidate. Useful for doing just a few lookups; it's more efficient to use
+ ## get_quickvote_candidate_map for presenting info about an entire election.
def quickvote_candidate_ids_to_names(shortname, id_list)
qv=QuickVote.ident_to_quickvote(shortname)
candidates={}
- return [] unless qv
+ raise ArgumentError.new("Quickvote by name #{shortname} doesn't exist") unless qv
qv.results
qv.candidates.each {|c| candidates[c.id] = c}
results=[]
}
results
end
+
+ ## Return the results of a QuickVote.
+ ## Takes in the name of a quickvote, and returns a structure as described by
+ ## QuickVoteResultStruct
def get_quickvote_results(shortname)
#TODO: Validate shortname
qv=QuickVote.ident_to_quickvote(shortname)
- result=VoteResultStruct.new
- result.errors=[]
+ result=QuickVoteResultStruct.new
unless qv
- result.errors << "No quickvote with name #{shortname} found!"
- return result
+ raise ArgumentError.new("No quickvote with name #{shortname} found!")
end
qv.results
result.plurality_winners=qv.plurality_result.winners
result.borda_winners=qv.borda_result.winners
result
end
+
+ ## Returns information regarding all the candidates in a QuickVote
+ ## Takes in a QuickVote name, and returns the list of names and ID's of candidates
+ ## This can be useful for presenting the user with a list of readable names, while
+ ## the software sends results to us in the numeric ID's we require. The two lists are in
+ ## respective order.
def get_quickvote_candidate_map(shortname)
qv=QuickVote.ident_to_quickvote(shortname)
- result=CandidateMap.new
- result.errors=[]
+ result=QuickVoteCandidateMap.new
unless qv
- result.errors << "No quickvote with name #{shortname} found!"
- return result
+ raise ArgumentError.new("No quickvote with name #{shortname} found!")
end
candidates={}
qv.candidates.each {|c| candidates[c.id] = c.name}
result.candidate_names=candidates.values
result
end
+
+ ## Get information on all the votes cast in a QuickVote
+ ## Takes in the name of a QuickVote, returns an array of QuickVoterInfo structures.
def get_quickvote_votes(shortname)
- qv=QuickVote.ident_to_quickvote(shortname)
- votes=Array.new
+ qv = QuickVote.ident_to_quickvote(shortname)
+
unless qv
- return result
+ raise ArgumentError.new("Cannot find QuickVote #{shortname}")
end
- qv.votes.each do |vote|
- votes << VoteInfo.new(:voter_id => vote.voter.id, :voter_ipaddress => vote.voter.ipaddress, :vote_time => vote.time.to_i)
+
+ qv.votes.collect do |vote|
+ QuickVoterInfo.new(:voter_id => vote.voter.id,
+ :voter_ipaddress => vote.voter.ipaddress,
+ :vote_time => vote.time.to_i,
+ :vote => vote.votes,
+ :voter_session_id => vote.voter.session_id)
end
- return votes
end
+
+ ## Gets a list of all QuickVotes in the system.
def list_quickvotes()
- all=Array.new
- QuickVote.find_all.each do |election|
- all << ElectionStruct.new (:id => election.id, :name => election.name, :description => election.description)
+ QuickVote.find(:all).collect do |election|
+ get_quickvote(election.name)
+ end
+ end
+
+ ## Gets information on a particular QuickVote
+ ## Takes in a QuickVote name
+ def get_quickvote(shortname)
+ unless election = QuickVote.ident_to_quickvote(shortname)
+ raise ArgumentError.new("Cannot find QuickVote named #{shortname}")
+ end
+
+ QuickVoteStruct.new(
+ :id => election.id,
+ :name => election.name,
+ :description => election.description,
+ :candidate_ids => election.candidates.collect {|c| c.id },
+ :candidate_names => election.candidates.collect {|c| c.name } )
+ end
+
+ ## Create a QuickVote
+ ## Pass in a QuickVoteStruct populated with all the fields but the candidate ID's
+ ## Any candidate ID's you fill in will be ignored anyway.
+ def create_quickvote(election)
+ qv = QuickVote.new(:name => election.name,
+ :description => election.description)
+ qv.candidate_names = election.candidate_names
+
+ if qv.save
+ return ""
+ else
+ raise ArgumentError.new("Saving quickvote FAILED:"+qv.errors.inspect)
end
- return all
end
+
end
projects / selectricity-live / blobdiff