Add trending statuses (#17431)

* Add trending statuses

* Fix dangling items with stale scores in localized sets

* Various fixes and improvements

- Change approve_all/reject_all to approve_accounts/reject_accounts
- Change Trends::Query methods to not mutate the original query
- Change Trends::Query#skip to offset
- Change follow recommendations to be refreshed in a transaction

* Add tests for trending statuses filtering behaviour

* Fix not applying filtering scope in controller

app/models/trends/status_batch.rb

@@ -0,0 +1,65 @@
+# frozen_string_literal: true
+
+class Trends::StatusBatch
+  include ActiveModel::Model
+  include Authorization
+
+  attr_accessor :status_ids, :action, :current_account
+
+  def save
+    case action
+    when 'approve'
+      approve!
+    when 'approve_accounts'
+      approve_accounts!
+    when 'reject'
+      reject!
+    when 'reject_accounts'
+      reject_accounts!
+    end
+  end
+
+  private
+
+  def statuses
+    @statuses ||= Status.where(id: status_ids)
+  end
+
+  def status_accounts
+    @status_accounts ||= Account.where(id: statuses.map(&:account_id).uniq)
+  end
+
+  def approve!
+    statuses.each { |status| authorize(status, :review?) }
+    statuses.update_all(trendable: true)
+  end
+
+  def approve_accounts!
+    status_accounts.each do |account|
+      authorize(account, :review?)
+      account.update(trendable: true, reviewed_at: action_time)
+    end
+
+    # Reset any individual overrides
+    statuses.update_all(trendable: nil)
+  end
+
+  def reject!
+    statuses.each { |status| authorize(status, :review?) }
+    statuses.update_all(trendable: false)
+  end
+
+  def reject_accounts!
+    status_accounts.each do |account|
+      authorize(account, :review?)
+      account.update(trendable: false, reviewed_at: action_time)
+    end
+
+    # Reset any individual overrides
+    statuses.update_all(trendable: nil)
+  end
+
+  def action_time
+    @action_time ||= Time.now.utc
+  end
+end