class Kangaru::Database

def migrate!
  return unless handler
  return unless migrations_exist?
  Sequel.extension(:migration)
  Sequel::Migrator.run(handler, migration_path)
end

def migrations_exist?
  return false if migration_path.nil?
  Dir.exist?(migration_path) && !Dir.empty?(migration_path)
end

def setup!
  raise "adaptor can't be blank" if adaptor.nil?
  @handler = case adaptor
             when :sqlite then setup_sqlite!
             else raise "invalid adaptor '#{adaptor}'"
             end
end

def setup_sqlite!
  raise "path can't be blank" if path.nil?
  FileUtils.mkdir_p(File.dirname(path))
  Sequel.sqlite(path).tap do
    PLUGINS.each { |plugin| Sequel::Model.plugin(plugin) }
  end
end