adds abilities for regular users

app/models/ability.rb

@@ -16,6 +16,22 @@ class Ability
       can :create, Comment
       can :create, Debate
 
+      can :flag_as_inappropiate, Comment do |comment|
+        comment.author != user && !InappropiateFlag.flagged?(user, comment)
+      end
+
+      can :undo_flag_as_inappropiate, Comment do |comment|
+        comment.author != user && InappropiateFlag.flagged?(user, comment)
+      end
+
+      can :flag_as_inappropiate, Debate do |debate|
+        debate.author != user && !InappropiateFlag.flagged?(user, debate)
+      end
+
+      can :undo_flag_as_inappropiate, Debate do |debate|
+        debate.author != user && InappropiateFlag.flagged?(user, debate)
+      end
+
       unless user.organization?
         can :vote, Debate
         can :vote, Comment

app/models/comment.rb

@@ -34,6 +34,10 @@ class Comment < ActiveRecord::Base
     user
   end
 
+  def author=(author)
+    self.user= author
+  end
+
   def total_votes
     votes_for.size
   end

spec/models/ability_spec.rb

@@ -22,12 +22,48 @@ describe Ability do
     it { should be_able_to(:show, debate) }
     it { should be_able_to(:vote, debate) }
 
+
     it { should be_able_to(:show, user) }
     it { should be_able_to(:edit, user) }
 
     it { should be_able_to(:create, Comment) }
     it { should be_able_to(:vote, Comment) }
 
+    describe 'flagging content as inappropiate' do
+      it { should be_able_to(:flag_as_inappropiate, debate) }
+      it { should_not be_able_to(:undo_flag_as_inappropiate, debate) }
+      it { should be_able_to(:flag_as_inappropiate, comment) }
+      it { should_not be_able_to(:undo_flag_as_inappropiate, comment) }
+
+      describe "own comments" do
+        let(:own_comment) { create(:comment, author: user) }
+
+        it { should_not be_able_to(:flag_as_inappropiate, own_comment) }
+        it { should_not be_able_to(:undo_flag_as_inappropiate, own_comment) }
+      end
+
+      describe "own debates" do
+        let(:own_debate) { create(:debate, author: user) }
+
+        it { should_not be_able_to(:flag_as_inappropiate, own_debate) }
+        it { should_not be_able_to(:undo_flag_as_inappropiate, own_debate) }
+      end
+
+      describe "already-flagged comments" do
+        before(:each) { InappropiateFlag.flag!(user, comment) }
+
+        it { should_not be_able_to(:flag_as_inappropiate, comment) }
+        it { should be_able_to(:undo_flag_as_inappropiate, comment) }
+      end
+
+      describe "already-flagged debates" do
+        before(:each) { InappropiateFlag.flag!(user, debate) }
+
+        it { should_not be_able_to(:flag_as_inappropiate, debate) }
+        it { should be_able_to(:undo_flag_as_inappropiate, debate) }
+      end
+    end
+
     describe "other users" do
       let(:other_user) { create(:user) }
       it { should_not be_able_to(:show, other_user) }