refactor un/star querys from service to query

lib/travis/api/v3/queries/repository.rb

@@ -8,12 +8,18 @@ module Travis::API::V3
       raise WrongParams, 'missing repository.id'.freeze
     end
 
-    def star
-      Models::StarredRepository.create(repo_id: id, user_id: user_id)
+    def star(repository, current_user)
+      starred = Models::StarredRepository.where(repository_id: repository.id, user_id: current_user.id).first
+      raise AlreadyStarred unless starred == nil
+      Models::StarredRepository.create(repository_id: repository.id, user_id: current_user.id)
+      repository
     end
 
-    def unstar
-      Models::StarredRepository.where(repo_id: id, user_id: user_id).delete
+    def unstar(repository, current_user)
+      starred = Models::StarredRepository.where(repository_id: repository.id, user_id: current_user.id).first
+      raise NotStarred if starred == nil
+      starred.delete
+      repository
     end
 
     private

lib/travis/api/v3/services/repository/star.rb

@@ -3,11 +3,8 @@ module Travis::API::V3
     def run!
       raise LoginRequired unless access_control.logged_in? or access_control.full_access?
       raise NotFound      unless repository = find(:repository)
-      starred = Models::StarredRepository.where(repository_id: repository.id, user_id: access_control.user.id).first
-      raise AlreadyStarred unless starred == nil
-
-      Models::StarredRepository.create(repository_id: repository.id, user_id: access_control.user.id)
-      repository #TODO what do we want to return???
+      current_user = access_control.user
+      query.star(repository, current_user)
     end
 
     # def check_access(repository)

lib/travis/api/v3/services/repository/unstar.rb

@@ -3,10 +3,8 @@ module Travis::API::V3
     def run!
       raise LoginRequired unless access_control.logged_in? or access_control.full_access?
       raise NotFound      unless repository = find(:repository)
-      starred = Models::StarredRepository.where(repository_id: repository.id, user_id: access_control.user.id).first
-      raise NotStarred if starred == nil
-      starred.delete
-      repository #TODO what do we want to return???
+      current_user = access_control.user
+      query.unstar(repository, current_user)
     end
 
     # def check_access(repository)