Add ability to disable login and mark accounts as memorial (#5615)

Fix #5597

app/models/account.rb

@@ -41,6 +41,7 @@
 #  shared_inbox_url        :string           default(""), not null
 #  followers_url           :string           default(""), not null
 #  protocol                :integer          default("ostatus"), not null
+#  memorial                :boolean          default(FALSE), not null
 #
 
 class Account < ApplicationRecord
@@ -150,6 +151,20 @@ class Account < ApplicationRecord
     ResolveRemoteAccountService.new.call(acct)
   end
 
+  def unsuspend!
+    transaction do
+      user&.enable! if local?
+      update!(suspended: false)
+    end
+  end
+
+  def memorialize!
+    transaction do
+      user&.disable! if local?
+      update!(memorial: true)
+    end
+  end
+
   def keypair
     @keypair ||= OpenSSL::PKey::RSA.new(private_key || public_key)
   end