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

Fix #5597

app/services/suspend_account_service.rb

@@ -1,22 +1,27 @@
 # frozen_string_literal: true
 
 class SuspendAccountService < BaseService
-  def call(account, remove_user = false)
+  def call(account, options = {})
     @account = account
+    @options = options
 
-    purge_user if remove_user
-    purge_profile
-    purge_content
-    unsubscribe_push_subscribers
+    purge_user!
+    purge_profile!
+    purge_content!
+    unsubscribe_push_subscribers!
   end
 
   private
 
-  def purge_user
-    @account.user.destroy
+  def purge_user!
+    if @options[:remove_user]
+      @account.user&.destroy
+    else
+      @account.user&.disable!
+    end
   end
 
-  def purge_content
+  def purge_content!
     @account.statuses.reorder(nil).find_in_batches do |statuses|
       BatchedRemoveStatusService.new.call(statuses)
     end
@@ -33,7 +38,7 @@ class SuspendAccountService < BaseService
     end
   end
 
-  def purge_profile
+  def purge_profile!
     @account.suspended    = true
     @account.display_name = ''
     @account.note         = ''
@@ -42,7 +47,7 @@ class SuspendAccountService < BaseService
     @account.save!
   end
 
-  def unsubscribe_push_subscribers
+  def unsubscribe_push_subscribers!
     destroy_all(@account.subscriptions)
   end