require_dependency Rails.root.join('lib/gitlab') # Load Gitlab as soon as possible

class Settings < Settingslogic
  source ENV.fetch('GITLAB_CONFIG') { "#{Rails.root}/config/gitlab.yml" }
  namespace Rails.env

  class << self
    def gitlab_on_standard_port?
      on_standard_port?(gitlab)
    end

    def host_without_www(url)
      host(url).sub('www.', '')
    end

    def build_gitlab_ci_url
      custom_port =
        if on_standard_port?(gitlab)
          nil
        else
          ":#{gitlab.port}"
        end

      [
        gitlab.protocol,
        "://",
        gitlab.host,
        custom_port,
        gitlab.relative_url_root
      ].join('')
    end

    def build_pages_url
      base_url(pages).join('')
    end

    def build_gitlab_shell_ssh_path_prefix
      user_host = "#{gitlab_shell.ssh_user}@#{gitlab_shell.ssh_host}"

      if gitlab_shell.ssh_port != 22
        "ssh://#{user_host}:#{gitlab_shell.ssh_port}/"
      else
        if gitlab_shell.ssh_host.include? ':'
          "[#{user_host}]:"
        else
          "#{user_host}:"
        end
      end
    end

    def build_base_gitlab_url
      base_url(gitlab).join('')
    end

    def build_gitlab_url
      (base_url(gitlab) + [gitlab.relative_url_root]).join('')
    end

    # check that values in `current` (string or integer) is a contant in `modul`.
    def verify_constant_array(modul, current, default)
      values = default || []
      unless current.nil?
        values = []
        current.each do |constant|
          values.push(verify_constant(modul, constant, nil))
        end
        values.delete_if { |value| value.nil? }
      end
      values
    end

    # check that `current` (string or integer) is a contant in `modul`.
    def verify_constant(modul, current, default)
      constant = modul.constants.find{ |name| modul.const_get(name) == current }
      value = constant.nil? ? default : modul.const_get(constant)
      if current.is_a? String
        value = modul.const_get(current.upcase) rescue default
      end
      value
    end

    def absolute(path)
      File.expand_path(path, Rails.root)
    end

    private

    def base_url(config)
      custom_port = on_standard_port?(config) ? nil : ":#{config.port}"

      [
        config.protocol,
        "://",
        config.host,
        custom_port
      ]
    end

    def on_standard_port?(config)
      config.port.to_i == (config.https ? 443 : 80)
    end

    # Extract the host part of the given +url+.
    def host(url)
      url = url.downcase
      url = "http://#{url}" unless url.start_with?('http')

      # Get rid of the path so that we don't even have to encode it
      url_without_path = url.sub(%r{(https?://[^\/]+)/?.*}, '\1')

      URI.parse(url_without_path).host
    end

    # Random cron time every Sunday to load balance usage pings
    def cron_random_weekly_time
      hour = rand(24)
      minute = rand(60)

      "#{minute} #{hour} * * 0"
    end
  end
end

# Default settings
Settings['ldap'] ||= Settingslogic.new({})
Settings.ldap['enabled'] = false if Settings.ldap['enabled'].nil?

# backwards compatibility, we only have one host
if Settings.ldap['enabled'] || Rails.env.test?
  if Settings.ldap['host'].present?
    # We detected old LDAP configuration syntax. Update the config to make it
    # look like it was entered with the new syntax.
    server = Settings.ldap.except('sync_time')
    Settings.ldap['servers'] = {
      'main' => server
    }
  end

  Settings.ldap['servers'].each do |key, server|
    server['label'] ||= 'LDAP'
    server['timeout'] ||= 10.seconds
    server['block_auto_created_users'] = false if server['block_auto_created_users'].nil?
    server['allow_username_or_email_login'] = false if server['allow_username_or_email_login'].nil?
    server['active_directory'] = true if server['active_directory'].nil?
    server['attributes'] = {} if server['attributes'].nil?
    server['provider_name'] ||= "ldap#{key}".downcase
    server['provider_class'] = OmniAuth::Utils.camelize(server['provider_name'])
  end
end

Settings['omniauth'] ||= Settingslogic.new({})
Settings.omniauth['enabled'] = false if Settings.omniauth['enabled'].nil?
Settings.omniauth['auto_sign_in_with_provider'] = false if Settings.omniauth['auto_sign_in_with_provider'].nil?
Settings.omniauth['allow_single_sign_on'] = false if Settings.omniauth['allow_single_sign_on'].nil?
Settings.omniauth['external_providers'] = [] if Settings.omniauth['external_providers'].nil?
Settings.omniauth['block_auto_created_users'] = true if Settings.omniauth['block_auto_created_users'].nil?
Settings.omniauth['auto_link_ldap_user'] = false if Settings.omniauth['auto_link_ldap_user'].nil?
Settings.omniauth['auto_link_saml_user'] = false if Settings.omniauth['auto_link_saml_user'].nil?

Settings.omniauth['providers'] ||= []
Settings.omniauth['cas3'] ||= Settingslogic.new({})
Settings.omniauth.cas3['session_duration'] ||= 8.hours
Settings.omniauth['session_tickets'] ||= Settingslogic.new({})
Settings.omniauth.session_tickets['cas3'] = 'ticket'

# Fill out omniauth-gitlab settings. It is needed for easy set up GHE or GH by just specifying url.

github_default_url = "https://github.com"
github_settings = Settings.omniauth['providers'].find { |provider| provider["name"] == "github" }

if github_settings
  # For compatibility with old config files (before 7.8)
  # where people dont have url in github settings
  if github_settings['url'].blank?
    github_settings['url'] = github_default_url
  end

  github_settings["args"] ||= Settingslogic.new({})

  github_settings["args"]["client_options"] =
    if github_settings["url"].include?(github_default_url)
      OmniAuth::Strategies::GitHub.default_options[:client_options]
    else
      {
        "site"          => File.join(github_settings["url"], "api/v3"),
        "authorize_url" => File.join(github_settings["url"], "login/oauth/authorize"),
        "token_url"     => File.join(github_settings["url"], "login/oauth/access_token")
      }
    end
end

Settings['shared'] ||= Settingslogic.new({})
Settings.shared['path'] = Settings.absolute(Settings.shared['path'] || "shared")

Settings['issues_tracker'] ||= {}

#
# GitLab
#
Settings['gitlab'] ||= Settingslogic.new({})
Settings.gitlab['default_projects_limit'] ||= 100000
Settings.gitlab['default_branch_protection'] ||= 2
Settings.gitlab['default_can_create_group'] = true if Settings.gitlab['default_can_create_group'].nil?
Settings.gitlab['host']       ||= ENV['GITLAB_HOST'] || 'localhost'
Settings.gitlab['ssh_host']   ||= Settings.gitlab.host
Settings.gitlab['https']        = false if Settings.gitlab['https'].nil?
Settings.gitlab['port']       ||= Settings.gitlab.https ? 443 : 80
Settings.gitlab['relative_url_root'] ||= ENV['RAILS_RELATIVE_URL_ROOT'] || ''
Settings.gitlab['protocol'] ||= Settings.gitlab.https ? "https" : "http"
Settings.gitlab['email_enabled'] ||= true if Settings.gitlab['email_enabled'].nil?
Settings.gitlab['email_from'] ||= ENV['GITLAB_EMAIL_FROM'] || "gitlab@#{Settings.gitlab.host}"
Settings.gitlab['email_display_name'] ||= ENV['GITLAB_EMAIL_DISPLAY_NAME'] || 'GitLab'
Settings.gitlab['email_reply_to'] ||= ENV['GITLAB_EMAIL_REPLY_TO'] || "noreply@#{Settings.gitlab.host}"
Settings.gitlab['email_subject_suffix'] ||= ENV['GITLAB_EMAIL_SUBJECT_SUFFIX'] || ""
Settings.gitlab['base_url']   ||= Settings.__send__(:build_base_gitlab_url)
Settings.gitlab['url']        ||= Settings.__send__(:build_gitlab_url)
Settings.gitlab['user']       ||= 'git'
Settings.gitlab['user_home']  ||= begin
  Etc.getpwnam(Settings.gitlab['user']).dir
rescue ArgumentError # no user configured
  '/home/' + Settings.gitlab['user']
end
Settings.gitlab['time_zone'] ||= nil
Settings.gitlab['signup_enabled'] ||= true if Settings.gitlab['signup_enabled'].nil?
Settings.gitlab['signin_enabled'] ||= true if Settings.gitlab['signin_enabled'].nil?
Settings.gitlab['restricted_visibility_levels'] = Settings.__send__(:verify_constant_array, Gitlab::VisibilityLevel, Settings.gitlab['restricted_visibility_levels'], [])
Settings.gitlab['username_changing_enabled'] = true if Settings.gitlab['username_changing_enabled'].nil?
Settings.gitlab['issue_closing_pattern'] = '((?:[Cc]los(?:e[sd]?|ing)|[Ff]ix(?:e[sd]|ing)?|[Rr]esolv(?:e[sd]?|ing))(:?) +(?:(?:issues? +)?%{issue_ref}(?:(?:, *| +and +)?)|([A-Z][A-Z0-9_]+-\d+))+)' if Settings.gitlab['issue_closing_pattern'].nil?
Settings.gitlab['default_projects_features'] ||= {}
Settings.gitlab['webhook_timeout'] ||= 10
Settings.gitlab['max_attachment_size'] ||= 10
Settings.gitlab['session_expire_delay'] ||= 10080
Settings.gitlab.default_projects_features['issues']             = true if Settings.gitlab.default_projects_features['issues'].nil?
Settings.gitlab.default_projects_features['merge_requests']     = true if Settings.gitlab.default_projects_features['merge_requests'].nil?
Settings.gitlab.default_projects_features['wiki']               = true if Settings.gitlab.default_projects_features['wiki'].nil?
Settings.gitlab.default_projects_features['snippets']           = true if Settings.gitlab.default_projects_features['snippets'].nil?
Settings.gitlab.default_projects_features['builds']             = true if Settings.gitlab.default_projects_features['builds'].nil?
Settings.gitlab.default_projects_features['container_registry'] = true if Settings.gitlab.default_projects_features['container_registry'].nil?
Settings.gitlab.default_projects_features['visibility_level']   = Settings.__send__(:verify_constant, Gitlab::VisibilityLevel, Settings.gitlab.default_projects_features['visibility_level'], Gitlab::VisibilityLevel::PRIVATE)
Settings.gitlab['domain_whitelist'] ||= []
Settings.gitlab['import_sources'] ||= %w[github bitbucket gitlab google_code fogbugz git gitlab_project gitea]
Settings.gitlab['trusted_proxies'] ||= []
Settings.gitlab['no_todos_messages'] ||= YAML.load_file(Rails.root.join('config', 'no_todos_messages.yml'))

#
# CI
#
Settings['gitlab_ci'] ||= Settingslogic.new({})
Settings.gitlab_ci['shared_runners_enabled'] = true if Settings.gitlab_ci['shared_runners_enabled'].nil?
Settings.gitlab_ci['all_broken_builds']     = true if Settings.gitlab_ci['all_broken_builds'].nil?
Settings.gitlab_ci['add_pusher']            = false if Settings.gitlab_ci['add_pusher'].nil?
Settings.gitlab_ci['builds_path']           = Settings.absolute(Settings.gitlab_ci['builds_path'] || "builds/")
Settings.gitlab_ci['url']                 ||= Settings.__send__(:build_gitlab_ci_url)

#
# Reply by email
#
Settings['incoming_email'] ||= Settingslogic.new({})
Settings.incoming_email['enabled'] = false if Settings.incoming_email['enabled'].nil?

#
# Build Artifacts
#
Settings['artifacts'] ||= Settingslogic.new({})
Settings.artifacts['enabled']      = true if Settings.artifacts['enabled'].nil?
Settings.artifacts['path']         = Settings.absolute(Settings.artifacts['path'] || File.join(Settings.shared['path'], "artifacts"))
Settings.artifacts['max_size']   ||= 100 # in megabytes

#
# Registry
#
Settings['registry'] ||= Settingslogic.new({})
Settings.registry['enabled']       ||= false
Settings.registry['host']          ||= "example.com"
Settings.registry['port']          ||= nil
Settings.registry['api_url']       ||= "http://localhost:5000/"
Settings.registry['key']           ||= nil
Settings.registry['issuer']        ||= nil
Settings.registry['host_port']     ||= [Settings.registry['host'], Settings.registry['port']].compact.join(':')
Settings.registry['path']            = Settings.absolute(Settings.registry['path'] || File.join(Settings.shared['path'], 'registry'))

#
# Pages
#
Settings['pages'] ||= Settingslogic.new({})
Settings.pages['enabled']         = false if Settings.pages['enabled'].nil?
Settings.pages['path']            = Settings.absolute(Settings.pages['path'] || File.join(Settings.shared['path'], "pages"))
Settings.pages['https']           = false if Settings.pages['https'].nil?
Settings.pages['host']            ||= "example.com"
Settings.pages['port']            ||= Settings.pages.https ? 443 : 80
Settings.pages['protocol']        ||= Settings.pages.https ? "https" : "http"
Settings.pages['url']             ||= Settings.__send__(:build_pages_url)
Settings.pages['external_http']   ||= false unless Settings.pages['external_http'].present?
Settings.pages['external_https']  ||= false unless Settings.pages['external_https'].present?

#
# Git LFS
#
Settings['lfs'] ||= Settingslogic.new({})
Settings.lfs['enabled']      = true if Settings.lfs['enabled'].nil?
Settings.lfs['storage_path'] = Settings.absolute(Settings.lfs['storage_path'] || File.join(Settings.shared['path'], "lfs-objects"))

#
# Mattermost
#
Settings['mattermost'] ||= Settingslogic.new({})
Settings.mattermost['enabled'] = false if Settings.mattermost['enabled'].nil?
Settings.mattermost['host'] = nil unless Settings.mattermost.enabled

#
# Gravatar
#
Settings['gravatar'] ||= Settingslogic.new({})
Settings.gravatar['enabled']      = true if Settings.gravatar['enabled'].nil?
Settings.gravatar['plain_url']  ||= 'http://www.gravatar.com/avatar/%{hash}?s=%{size}&d=identicon'
Settings.gravatar['ssl_url']    ||= 'https://secure.gravatar.com/avatar/%{hash}?s=%{size}&d=identicon'
Settings.gravatar['host']         = Settings.host_without_www(Settings.gravatar['plain_url'])

#
# Cron Jobs
#
Settings['cron_jobs'] ||= Settingslogic.new({})
Settings.cron_jobs['stuck_ci_jobs_worker'] ||= Settingslogic.new({})
Settings.cron_jobs['stuck_ci_jobs_worker']['cron'] ||= '0 * * * *'
Settings.cron_jobs['stuck_ci_jobs_worker']['job_class'] = 'StuckCiJobsWorker'
Settings.cron_jobs['trigger_schedule_worker'] ||= Settingslogic.new({})
Settings.cron_jobs['trigger_schedule_worker']['cron'] ||= '0 */12 * * *'
Settings.cron_jobs['trigger_schedule_worker']['job_class'] = 'TriggerScheduleWorker'
Settings.cron_jobs['expire_build_artifacts_worker'] ||= Settingslogic.new({})
Settings.cron_jobs['expire_build_artifacts_worker']['cron'] ||= '50 * * * *'
Settings.cron_jobs['expire_build_artifacts_worker']['job_class'] = 'ExpireBuildArtifactsWorker'
Settings.cron_jobs['repository_check_worker'] ||= Settingslogic.new({})
Settings.cron_jobs['repository_check_worker']['cron'] ||= '20 * * * *'
Settings.cron_jobs['repository_check_worker']['job_class'] = 'RepositoryCheck::BatchWorker'
Settings.cron_jobs['admin_email_worker'] ||= Settingslogic.new({})
Settings.cron_jobs['admin_email_worker']['cron'] ||= '0 0 * * 0'
Settings.cron_jobs['admin_email_worker']['job_class'] = 'AdminEmailWorker'
Settings.cron_jobs['repository_archive_cache_worker'] ||= Settingslogic.new({})
Settings.cron_jobs['repository_archive_cache_worker']['cron'] ||= '0 * * * *'
Settings.cron_jobs['repository_archive_cache_worker']['job_class'] = 'RepositoryArchiveCacheWorker'
Settings.cron_jobs['import_export_project_cleanup_worker'] ||= Settingslogic.new({})
Settings.cron_jobs['import_export_project_cleanup_worker']['cron'] ||= '0 * * * *'
Settings.cron_jobs['import_export_project_cleanup_worker']['job_class'] = 'ImportExportProjectCleanupWorker'
Settings.cron_jobs['requests_profiles_worker'] ||= Settingslogic.new({})
Settings.cron_jobs['requests_profiles_worker']['cron'] ||= '0 0 * * *'
Settings.cron_jobs['requests_profiles_worker']['job_class'] = 'RequestsProfilesWorker'
Settings.cron_jobs['remove_expired_members_worker'] ||= Settingslogic.new({})
Settings.cron_jobs['remove_expired_members_worker']['cron'] ||= '10 0 * * *'
Settings.cron_jobs['remove_expired_members_worker']['job_class'] = 'RemoveExpiredMembersWorker'
Settings.cron_jobs['remove_expired_group_links_worker'] ||= Settingslogic.new({})
Settings.cron_jobs['remove_expired_group_links_worker']['cron'] ||= '10 0 * * *'
Settings.cron_jobs['remove_expired_group_links_worker']['job_class'] = 'RemoveExpiredGroupLinksWorker'
Settings.cron_jobs['prune_old_events_worker'] ||= Settingslogic.new({})
Settings.cron_jobs['prune_old_events_worker']['cron'] ||= '0 */6 * * *'
Settings.cron_jobs['prune_old_events_worker']['job_class'] = 'PruneOldEventsWorker'

Settings.cron_jobs['trending_projects_worker'] ||= Settingslogic.new({})
Settings.cron_jobs['trending_projects_worker']['cron'] = '0 1 * * *'
Settings.cron_jobs['trending_projects_worker']['job_class'] = 'TrendingProjectsWorker'
Settings.cron_jobs['remove_unreferenced_lfs_objects_worker'] ||= Settingslogic.new({})
Settings.cron_jobs['remove_unreferenced_lfs_objects_worker']['cron'] ||= '20 0 * * *'
Settings.cron_jobs['remove_unreferenced_lfs_objects_worker']['job_class'] = 'RemoveUnreferencedLfsObjectsWorker'
Settings.cron_jobs['stuck_import_jobs_worker'] ||= Settingslogic.new({})
Settings.cron_jobs['stuck_import_jobs_worker']['cron'] ||= '15 * * * *'
Settings.cron_jobs['stuck_import_jobs_worker']['job_class'] = 'StuckImportJobsWorker'
Settings.cron_jobs['gitlab_usage_ping_worker'] ||= Settingslogic.new({})
Settings.cron_jobs['gitlab_usage_ping_worker']['cron'] ||= Settings.__send__(:cron_random_weekly_time)
Settings.cron_jobs['gitlab_usage_ping_worker']['job_class'] = 'GitlabUsagePingWorker'

# Every day at 00:30
Settings.cron_jobs['schedule_update_user_activity_worker'] ||= Settingslogic.new({})
Settings.cron_jobs['schedule_update_user_activity_worker']['cron'] ||= '30 0 * * *'
Settings.cron_jobs['schedule_update_user_activity_worker']['job_class'] = 'ScheduleUpdateUserActivityWorker'

#
# GitLab Shell
#
Settings['gitlab_shell'] ||= Settingslogic.new({})
Settings.gitlab_shell['path']           = Settings.absolute(Settings.gitlab_shell['path'] || Settings.gitlab['user_home'] + '/gitlab-shell/')
Settings.gitlab_shell['hooks_path']     = Settings.absolute(Settings.gitlab_shell['hooks_path'] || Settings.gitlab['user_home'] + '/gitlab-shell/hooks/')
Settings.gitlab_shell['secret_file'] ||= Rails.root.join('.gitlab_shell_secret')
Settings.gitlab_shell['receive_pack']   = true if Settings.gitlab_shell['receive_pack'].nil?
Settings.gitlab_shell['upload_pack']    = true if Settings.gitlab_shell['upload_pack'].nil?
Settings.gitlab_shell['ssh_host']     ||= Settings.gitlab.ssh_host
Settings.gitlab_shell['ssh_port']     ||= 22
Settings.gitlab_shell['ssh_user']     ||= Settings.gitlab.user
Settings.gitlab_shell['owner_group']  ||= Settings.gitlab.user
Settings.gitlab_shell['ssh_path_prefix'] ||= Settings.__send__(:build_gitlab_shell_ssh_path_prefix)

#
# Repositories
#
Settings['repositories'] ||= Settingslogic.new({})
Settings.repositories['storages'] ||= {}
unless Settings.repositories.storages['default']
  Settings.repositories.storages['default'] ||= {}
  # We set the path only if the default storage doesn't exist, in case it exists
  # but follows the pre-9.0 configuration structure. `6_validations.rb` initializer
  # will validate all storages and throw a relevant error to the user if necessary.
  Settings.repositories.storages['default']['path'] ||= Settings.gitlab['user_home'] + '/repositories/'
end

Settings.repositories.storages.values.each do |storage|
  # Expand relative paths
  storage['path'] = Settings.absolute(storage['path'])
end

#
# The repository_downloads_path is used to remove outdated repository
# archives, if someone has it configured incorrectly, and it points
# to the path where repositories are stored this can cause some
# data-integrity issue. In this case, we sets it to the default
# repository_downloads_path value.
#
repositories_storages          = Settings.repositories.storages.values
repository_downloads_path      = Settings.gitlab['repository_downloads_path'].to_s.gsub(/\/$/, '')
repository_downloads_full_path = File.expand_path(repository_downloads_path, Settings.gitlab['user_home'])

if repository_downloads_path.blank? || repositories_storages.any? { |rs| [repository_downloads_path, repository_downloads_full_path].include?(rs['path'].gsub(/\/$/, '')) }
  Settings.gitlab['repository_downloads_path'] = File.join(Settings.shared['path'], 'cache/archive')
end

#
# Backup
#
Settings['backup'] ||= Settingslogic.new({})
Settings.backup['keep_time']  ||= 0
Settings.backup['pg_schema']    = nil
Settings.backup['path']         = Settings.absolute(Settings.backup['path'] || "tmp/backups/")
Settings.backup['archive_permissions'] ||= 0600
Settings.backup['upload'] ||= Settingslogic.new({ 'remote_directory' => nil, 'connection' => nil })
# Convert upload connection settings to use symbol keys, to make Fog happy
if Settings.backup['upload']['connection']
  Settings.backup['upload']['connection'] = Hash[Settings.backup['upload']['connection'].map { |k, v| [k.to_sym, v] }]
end
Settings.backup['upload']['multipart_chunk_size'] ||= 104857600
Settings.backup['upload']['encryption'] ||= nil
Settings.backup['upload']['storage_class'] ||= nil

#
# Git
#
Settings['git'] ||= Settingslogic.new({})
Settings.git['max_size']  ||= 20971520 # 20.megabytes
Settings.git['bin_path']  ||= '/usr/bin/git'
Settings.git['timeout']   ||= 10

# Important: keep the satellites.path setting until GitLab 9.0 at
# least. This setting is fed to 'rm -rf' in
# db/migrate/20151023144219_remove_satellites.rb
Settings['satellites'] ||= Settingslogic.new({})
Settings.satellites['path'] = Settings.absolute(Settings.satellites['path'] || "tmp/repo_satellites/")

#
# Extra customization
#
Settings['extra'] ||= Settingslogic.new({})

#
# Rack::Attack settings
#
Settings['rack_attack'] ||= Settingslogic.new({})
Settings.rack_attack['git_basic_auth'] ||= Settingslogic.new({})
Settings.rack_attack.git_basic_auth['enabled'] = true if Settings.rack_attack.git_basic_auth['enabled'].nil?
Settings.rack_attack.git_basic_auth['ip_whitelist'] ||= %w{127.0.0.1}
Settings.rack_attack.git_basic_auth['maxretry'] ||= 10
Settings.rack_attack.git_basic_auth['findtime'] ||= 1.minute
Settings.rack_attack.git_basic_auth['bantime'] ||= 1.hour

#
# Gitaly
#
Settings['gitaly'] ||= Settingslogic.new({})
Settings.gitaly['enabled'] ||= false

#
# Webpack settings
#
Settings['webpack'] ||= Settingslogic.new({})
Settings.webpack['dev_server'] ||= Settingslogic.new({})
Settings.webpack.dev_server['enabled'] ||= false
Settings.webpack.dev_server['host']    ||= 'localhost'
Settings.webpack.dev_server['port']    ||= 3808

#
# Testing settings
#
if Rails.env.test?
  Settings.gitlab['default_projects_limit']   = 42
  Settings.gitlab['default_can_create_group'] = true
  Settings.gitlab['default_can_create_team']  = false
end

# Force a refresh of application settings at startup
ApplicationSetting.expire
