Added support for plusoners and resharers

README.md

@@ -84,6 +84,10 @@ cursor = person.activities_list(:max_results => 10)
 cursor.next_page(:max_results => 5)
 ```
 
+## Plusoners and Resharers
+
+You can call `plusoners` and `resharers` on a `GooglePlus::Activity` to get a cursor or people that plus one'd or reshared an activity.
+
 ## Comments
 
 You can get comments for an acitivty, using its ID:

lib/google_plus/activity.rb

@@ -26,14 +26,33 @@ def self.for_person(user_id, params = {})
       GooglePlus::Cursor.new(self, :get, resource, params)
     end
 
+    # get the comments for this activity
     def list_comments
       GooglePlus::Comment.for_activity(id) 
     end
 
+    # get the actor of this activity
     def person
       @person ||= GooglePlus::Person.get(actor.id)
     end
 
+    # list the people of a certain action on this activity
+    # options available at https://developers.google.com/+/api/latest/people/listByActivity
+    def list_people(collection, params = {})
+      resource = "activities/#{id}/people/#{collection}"
+      GooglePlus::Cursor.new(GooglePlus::Person, :get, resource, params)
+    end
+
+    # get a cursor for the plusoners of this activity
+    def plusoners(params = {})
+      list_people(:plusoners)
+    end
+
+    # get a cursor for the resharers of this activity
+    def resharers(params = {})
+      list_people(:resharers)
+    end
+
     def initialize(hash)
       load_hash(hash)
     end

spec/examples/activity_spec.rb

@@ -16,6 +16,50 @@
 
   end
 
+  describe :plusoners do
+
+    before :each do
+      GooglePlus.api_key = TEST_API_KEY
+    end
+
+    it 'should be able to get a list of plusoners' do
+      activity = GooglePlus::Activity.get('z12bwfehenrus14jq04cfvgowmqhvfzrlfo')
+      plusoners = activity.plusoners
+      plusoners.items.should_not be_empty
+      plusoners.items.each { |r| r.should be_a(GooglePlus::Person) }
+    end
+
+  end
+
+  describe :resharers do
+
+    before :each do
+      GooglePlus.api_key = TEST_API_KEY
+    end
+
+    it 'should be able to get a list of resharers' do
+      activity = GooglePlus::Activity.get('z12bwfehenrus14jq04cfvgowmqhvfzrlfo')
+      resharers = activity.resharers
+      resharers.items.should_not be_empty
+      resharers.items.each { |r| r.should be_a(GooglePlus::Person) }
+    end
+
+  end
+
+  describe :list_people do
+
+    before :each do
+      GooglePlus.api_key = TEST_API_KEY
+    end
+
+    it 'should get nil for an invalid collection' do 
+      activity = GooglePlus::Activity.get('z12bwfehenrus14jq04cfvgowmqhvfzrlfo')
+      hellos = activity.list_people 'hello'
+      hellos.items.should be_nil
+    end
+
+  end
+
   describe :list_comments do
 
     before :each do