zammad/lib/validations/mention_validator.rb

# Copyright (C) 2012-2024 Zammad Foundation, https://zammad-foundation.org/

class Validations::MentionValidator < ActiveModel::Validator
  def validate(record)
    return if Mention.mentionable? record.mentionable, record.user

    record.errors.add :base, __('A mentioned user has no agent access to this ticket')
  end
end