X-Git-Url: https://projects.mako.cc/source/rubyvote/blobdiff_plain/0ef8f53fb812bcc40337a92f9c4d11ab193f73a9..c9649b477b0e94c4f7f36e6d42225e0d6a113f57:/lib/rubyvote/election.rb

diff --git a/lib/rubyvote/election.rb b/lib/rubyvote/election.rb
index 7fd8396..1d98d91 100644
--- a/lib/rubyvote/election.rb
+++ b/lib/rubyvote/election.rb
@@ -42,7 +42,11 @@ class ElectionVote
     if votes
       if votes.instance_of?( Array )
         votes.each do |vote|
-          self.tally_vote(vote) if self.verify_vote(vote)
+          if self.verify_vote(vote)
+            self.tally_vote(vote)
+          else
+            raise InvalidVoteError.new("Invalid vote object", vote)
+          end
         end
       else
         raise ElectionError, "Votes must be in the form of an array.", caller
@@ -58,9 +62,10 @@ class ElectionVote
   end
 
   # by default, this does nothing. it must be redefined in any subclass
-  def tally_vote
+  def tally_vote(vote)
     self.verify_vote(vote)
   end
+
 end
 
 class PluralityVote < ElectionVote
@@ -70,7 +75,7 @@ class PluralityVote < ElectionVote
   
   protected
   def verify_vote(vote=nil)
-    vote.instance_of?( String )
+    vote ? true : false
   end
 
   def tally_vote(candidate)
@@ -103,12 +108,18 @@ end
 ## Election Result Classes
 ##
 
-## There classes are used to compute and report the results of an
-## election. In almost all cases, these will be returned by the
-## #results method of a corresponding ElectionVote subclass.
-
+# ElectionResult and its subclasses are used to identify and report the results
+# of an election. In almost all cases, these will be returned by the #results
+# method of a corresponding ElectionVote subclass.
+#
+# Each ElectionResult object has the following methods:
+#
+#  * #winner? -- return Boolean as to the winner or winners of an election
+#  * #winners -- an array of winners of the election
+#  * #ranked_candidates -- (where available) a list of ranked candidates
 class ElectionResult
   attr_reader :winners
+  attr_reader :election
 
   def initialize(voteobj=nil)
     unless voteobj and voteobj.kind_of?( ElectionVote )
@@ -124,14 +135,15 @@ class ElectionResult
   end
 
   def winner?
-    @winners.length > 0
+    @winners.length > 0 and not @winners[0].nil?
   end
-
+  
 end
 
 class PluralityResult < ElectionResult
   attr_reader :ranked_candidates
-
+  attr_reader :points
+  
   def initialize(voteobj=nil)
     super(voteobj)
 
@@ -142,6 +154,8 @@ class PluralityResult < ElectionResult
       b[1] <=> a[1]
     end.collect {|a| a[0]}
     
+    @points = @election.votes
+    
     # winners are anyone who has the same number of votes as the
     # first person
     @winners = @ranked_candidates.find_all do |i|
@@ -158,3 +172,10 @@ end
 class ElectionError < ArgumentError
 end
 
+class InvalidVoteError < ElectionError
+  attr_accessor :voteobj
+  def initialize(msg=nil, voteobj=nil)
+    super(msg)
+    @voteobj=voteobj
+  end
+end