FEATURE: disable post editing when the post has active flag

app/models/post.rb

@@ -356,6 +356,10 @@ class Post < ActiveRecord::Base
     post_actions.where(post_action_type_id: PostActionType.flag_types.values, deleted_at: nil).count != 0
   end
 
+  def has_active_flag?
+    post_actions.active.where(post_action_type_id: PostActionType.flag_types.values).count != 0
+  end
+
   def unhide!
     self.update_attributes(hidden: false)
     self.topic.update_attributes(visible: true) if is_first_post?

lib/guardian/post_guardian.rb

@@ -90,7 +90,7 @@ module PostGuardian
       return true
     end
 
-    if post.topic.archived? || post.user_deleted || post.deleted_at
+    if post.topic.archived? || post.user_deleted || post.deleted_at || post.has_active_flag?
       return false
     end
 

spec/components/guardian_spec.rb

@@ -1008,6 +1008,29 @@ describe Guardian do
           expect(Guardian.new(admin).can_edit?(tos_first_post)).to be_truthy
         end
       end
+
+      context "flagged post" do
+        let(:user) { Fabricate(:user) }
+        let(:post) { Fabricate(:post) }
+        before { PostAction.act(user, post, PostActionType.types[:off_topic]) }
+
+        it 'returns false when post owner tries to edit active flagged post' do
+          expect(Guardian.new(post.user).can_edit?(post)).to be_falsey
+        end
+
+        it 'returns true when trust level 4 user tries to edit active flagged post' do
+          expect(Guardian.new(trust_level_4).can_edit?(post)).to be_truthy
+        end
+
+        it 'returns true when staff tries to edit active flagged post' do
+          expect(Guardian.new(moderator).can_edit?(post)).to be_truthy
+        end
+
+        it 'returns true when post owner tries to edit post with inactive flag' do
+          PostAction.defer_flags!(post, admin)
+          expect(Guardian.new(post.user).can_edit?(post)).to be_truthy
+        end
+      end
     end
 
     describe 'a Topic' do

spec/models/post_spec.rb

@@ -137,11 +137,12 @@ describe Post do
   end
 
   describe 'flagging helpers' do
-    it 'isFlagged is accurate' do
-      post = Fabricate(:post)
-      user = Fabricate(:coding_horror)
-      PostAction.act(user, post, PostActionType.types[:off_topic])
+    let(:post) { Fabricate(:post) }
+    let(:user) { Fabricate(:coding_horror) }
+    let(:admin) { Fabricate(:admin) }
 
+    it 'isFlagged is accurate' do
+      PostAction.act(user, post, PostActionType.types[:off_topic])
       post.reload
       expect(post.is_flagged?).to eq(true)
 
@@ -149,6 +150,16 @@ describe Post do
       post.reload
       expect(post.is_flagged?).to eq(false)
     end
+
+    it 'has_active_flag is accurate' do
+      PostAction.act(user, post, PostActionType.types[:spam])
+      post.reload
+      expect(post.has_active_flag?).to eq(true)
+
+      PostAction.defer_flags!(post, admin)
+      post.reload
+      expect(post.has_active_flag?).to eq(false)
+    end
   end
 
   describe "maximum images" do