Add emoji_reactions property to status api object

app/models/status.rb

@@ -62,6 +62,7 @@ class Status < ApplicationRecord
   belongs_to :reblog, foreign_key: 'reblog_of_id', class_name: 'Status', inverse_of: :reblogs, optional: true
 
   has_many :favourites, inverse_of: :status, dependent: :destroy
+  has_many :emoji_reactions, inverse_of: :status, dependent: :destroy
   has_many :bookmarks, inverse_of: :status, dependent: :destroy
   has_many :reblogs, foreign_key: 'reblog_of_id', class_name: 'Status', inverse_of: :reblog, dependent: :destroy
   has_many :reblogged_by_accounts, through: :reblogs, class_name: 'Account', source: :account
@@ -288,6 +289,29 @@ class Status < ApplicationRecord
     update_status_stat!(key => [public_send(key) - 1, 0].max)
   end
 
+  def emoji_reactions_grouped_by_name(account = nil)
+    (Oj.load(status_stat&.emoji_reactions || '', mode: :strict) || []).tap do |emoji_reactions|
+      if account.present?
+        emoji_reactions.each do |emoji_reaction|
+          emoji_reaction['me'] = emoji_reaction['account_ids'].include?(account.id.to_s)
+          emoji_reaction['count'] = emoji_reaction['account_ids'].size
+          emoji_reaction['account_ids'] -= account.excluded_from_timeline_account_ids.map(&:to_s)
+        end
+      end
+    end
+  end
+
+  def generate_emoji_reactions_grouped_by_name
+    records = emoji_reactions.group(:name).order(Arel.sql('MIN(created_at) ASC')).select('name, min(custom_emoji_id) as custom_emoji_id, count(*) as count, array_agg(account_id::text order by created_at) as account_ids')
+    Oj.dump(ActiveModelSerializers::SerializableResource.new(records, each_serializer: REST::EmojiReactionsGroupedByNameSerializer, scope: nil, scope_name: :current_user))
+  end
+
+  def refresh_emoji_reactions_grouped_by_name!
+    generate_emoji_reactions_grouped_by_name.tap do |emoji_reactions|
+      update_status_stat!(emoji_reactions: emoji_reactions)
+    end
+  end
+
   def trendable?
     if attributes['trendable'].nil?
       account.trendable?

app/models/status_stat.rb

@@ -9,6 +9,7 @@
 #  replies_count    :bigint(8)        default(0), not null
 #  reblogs_count    :bigint(8)        default(0), not null
 #  favourites_count :bigint(8)        default(0), not null
+#  emoji_reactions  :string
 #  created_at       :datetime         not null
 #  updated_at       :datetime         not null
 #
@@ -30,6 +31,10 @@ class StatusStat < ApplicationRecord
     [attributes['favourites_count'], 0].max
   end
 
+  def emoji_reactions
+    attributes['emoji_reactions'] || ''
+  end
+
   private
 
   def reset_parent_cache