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[selectricity] / app / models / selectricity_service.rb

diff --git a/app/models/selectricity_service.rb b/app/models/selectricity_service.rb
index 86458e09f6d6e84d928e62d5c9f2bcd5a2fbc160..aba9c02acae1fe455001e2a98ab1bbcbd6e9a6ac 100644 (file)
--- a/app/models/selectricity_service.rb
+++ b/app/models/selectricity_service.rb
@@ -1,12 +1,41 @@
+# 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
 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
   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 = 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.session_id = "XMLRPC:#{voter_id}"
       voter.vote=Vote.new
       voter.vote.votes=vote_list[0]


@@ -14,12 +43,19 @@ class SelectricityService < ActionWebService::Base
       voter.save!
       voter.vote.confirm!
       voter.save!
       voter.save!
       voter.vote.confirm!
       voter.save!

+    else
+      raise ArgumentError.new("Cannot find election #{election_name}")

     end
   end
     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={}
   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=[]
     qv.results
     qv.candidates.each {|c| candidates[c.id] = c}
     results=[]


@@ -33,14 +69,16 @@ class SelectricityService < ActionWebService::Base
     }
     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)
   def get_quickvote_results(shortname)
     #TODO: Validate shortname
     qv=QuickVote.ident_to_quickvote(shortname)

-    result=VoteResultStruct.new
-    result.errors=[]
+    result=QuickVoteResultStruct.new

     unless qv
     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
     end
     qv.results
     result.plurality_winners=qv.plurality_result.winners


@@ -50,13 +88,17 @@ class SelectricityService < ActionWebService::Base
     result.borda_winners=qv.borda_result.winners
     result
   end
     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)
   def get_quickvote_candidate_map(shortname)
     qv=QuickVote.ident_to_quickvote(shortname)

-    result=CandidateMap.new
-    result.errors=[]
+    result=QuickVoteCandidateMap.new

     unless qv
     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}
     end
     candidates={}
     qv.candidates.each {|c| candidates[c.id] = c.name}


@@ -64,5 +106,60 @@ class SelectricityService < ActionWebService::Base
     result.candidate_names=candidates.values
     result
   end
     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
 end