X-Git-Url: https://projects.mako.cc/source/selectricity/blobdiff_plain/f0a07fead89d29513f76ee42b29a0f87dbe926d6..206dea3e99fd260c31bc86b36b309071696f2b3a:/app/models/selectricity_service.rb?ds=inline

diff --git a/app/models/selectricity_service.rb b/app/models/selectricity_service.rb
index 9e276ef..aba9c02 100644
--- a/app/models/selectricity_service.rb
+++ b/app/models/selectricity_service.rb
@@ -1,16 +1,38 @@
+# 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)
+        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!
+      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"
@@ -22,13 +44,18 @@ class SelectricityService < ActionWebService::Base
       voter.vote.confirm!
       voter.save!
     else
-      raise ArgumentError.new "Cannot find election #{election_name}"
+      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=[]
@@ -42,14 +69,16 @@ class SelectricityService < ActionWebService::Base
     }
     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
@@ -59,13 +88,17 @@ class SelectricityService < ActionWebService::Base
     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}
@@ -73,35 +106,59 @@ class SelectricityService < ActionWebService::Base
     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, :vote => vote.votes)
+
+    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 << get_quickvote(election.name)
+    QuickVote.find(:all).collect do |election|
+      get_quickvote(election.name)
     end
-    return all
   end
+
+  ## Gets information on a particular QuickVote
+  ## Takes in a QuickVote name
   def get_quickvote(shortname)
-    return ElectionStruct.new unless election=QuickVote.ident_to_quickvote(shortname)
-    return ElectionStruct.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 } )
+    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.candidatelist=election.candidate_names
+    qv = QuickVote.new(:name => election.name,
+                       :description => election.description)
+    qv.candidate_names = election.candidate_names
+
     if qv.save
       return ""
     else
-      return "Saving quickvote FAILED:"+qv.errors.inspect
+      raise ArgumentError.new("Saving quickvote FAILED:"+qv.errors.inspect)
     end
   end