Add service classes for mutating AwardEmoji

Adding, destroying and toggling emoji previously lacked services and
instead were performed through methods called on Awardable models.

This led to inconsistencies where relevant todos would be marked as done
only when emoji were awarded through our controllers, but not through
the API. Todos could also be marked as done when an emoji was being
removed.

Behaviour changes

- Awarding emoji through the API will now mark a relevant Todo as done
- Toggling an emoji off (destroying it) through our controllers will no
  longer mark a relevant Todo as done

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/63372

1 files changed, 4 insertions, 2 deletions

diff --git a/app/models/award_emoji.rb b/app/models/award_emoji.rb
index e26162f6151..0ab302a0f3e 100644
--- a/app/models/award_emoji.rb
+++ b/app/models/award_emoji.rb
@@ -16,8 +16,10 @@ class AwardEmoji < ApplicationRecord
 
   participant :user
 
-  scope :downvotes, -> { where(name: DOWNVOTE_NAME) }
-  scope :upvotes,   -> { where(name: UPVOTE_NAME) }
+  scope :downvotes, -> { named(DOWNVOTE_NAME) }
+  scope :upvotes, -> { named(UPVOTE_NAME) }
+  scope :named, -> (names) { where(name: names) }
+  scope :awarded_by, -> (users) { where(user: users) }
 
   after_save :expire_etag_cache
   after_destroy :expire_etag_cache