Move account silence-related methods to concern (#28866)

app/models/concerns/account/silences.rb

@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+module Account::Silences
+  extend ActiveSupport::Concern
+
+  included do
+    scope :silenced, -> { where.not(silenced_at: nil) }
+    scope :without_silenced, -> { where(silenced_at: nil) }
+  end
+
+  def silenced?
+    silenced_at.present?
+  end
+
+  def silence!(date = Time.now.utc)
+    update!(silenced_at: date)
+  end
+
+  def unsilence!
+    update!(silenced_at: nil)
+  end
+end