User can leave group from group page.

1 files changed, 15 insertions, 0 deletions

diff --git a/app/models/ability.rb b/app/models/ability.rb
index 120af807448..ba0ce527f64 100644
--- a/app/models/ability.rb
+++ b/app/models/ability.rb
@@ -14,6 +14,7 @@ class Ability
       when "MergeRequest" then merge_request_abilities(user, subject)
       when "Group" then group_abilities(user, subject)
       when "Namespace" then namespace_abilities(user, subject)
+      when "UsersGroup" then users_group_abilities(user, subject)
       else []
       end.concat(global_abilities(user))
     end
@@ -219,5 +220,19 @@ class Ability
         end
       end
     end
+
+    def users_group_abilities(user, subject)
+      rules = []
+      target_user = subject.user
+      group = subject.group
+      can_manage = group_abilities(user, group).include?(:manage_group)
+      if can_manage && (user != target_user)
+        rules << :modify
+      end
+      if !group.last_owner?(user) && (can_manage || (user == target_user))
+        rules << :destroy
+      end
+      rules
+    end
   end
 end