X-Git-Url: https://projects.mako.cc/source/selectricity/blobdiff_plain/05ebed925ae2b5e7bf2a599536ba7d7ac15ffbf7..ad088c1324d08a65f6f5336bedf7a88a8a8950e7:/old_api_code/selectricity_service.rb

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+# 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.session_id = "XMLRPC:#{voter_id}"
+      voter.vote=Vote.new
+      voter.vote.votes=vote_list[0]
+      voter.vote.time = Time.now
+      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={}
+    raise ArgumentError.new("Quickvote by name #{shortname} doesn't exist") unless qv
+    qv.results
+    qv.candidates.each {|c| candidates[c.id] = c}
+    results=[]
+    id_list.each { |id|
+      name=candidates[id]
+      if name
+        results << name
+      else
+        results << ""
+      end
+    }
+    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=QuickVoteResultStruct.new
+    unless qv
+      raise ArgumentError.new("No quickvote with name #{shortname} found!")
+    end
+    qv.results
+    result.plurality_winners=qv.plurality_result.winners
+    result.approval_winners=qv.approval_result.winners
+    result.condorcet_winners=qv.condorcet_result.winners
+    result.ssd_winners=qv.ssd_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=QuickVoteCandidateMap.new
+    unless qv
+      raise ArgumentError.new("No quickvote with name #{shortname} found!")
+    end
+    candidates={}
+    qv.candidates.each {|c| candidates[c.id] = c.name}
+    result.candidate_ids=candidates.keys
+    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)
+
+    unless qv
+      raise ArgumentError.new("Cannot find QuickVote #{shortname}")
+    end
+
+    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
+  end
+
+  ## Gets a list of all QuickVotes in the system.
+  def list_quickvotes()
+    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
+  end
+
+end