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path: root/app/serializers/rest/v1/instance_serializer.rb
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# frozen_string_literal: true

class REST::V1::InstanceSerializer < ActiveModel::Serializer
  include RoutingHelper

  attributes :uri, :title, :short_description, :description, :email,
             :version, :urls, :stats, :thumbnail, :max_toot_chars, :poll_limits,
             :languages, :registrations, :approval_required, :invites_enabled,
             :configuration

  has_one :contact_account, serializer: REST::AccountSerializer

  has_many :rules, serializer: REST::RuleSerializer

  def uri
    object.domain
  end

  def short_description
    object.description
  end

  def description
    Setting.site_description # Legacy
  end

  def email
    object.contact.email
  end

  def contact_account
    object.contact.account
  end

  def thumbnail
    instance_presenter.thumbnail ? full_asset_url(instance_presenter.thumbnail.file.url) : full_pack_url('media/images/preview.png')
  end

  def max_toot_chars
    StatusLengthValidator::MAX_CHARS
  end

  def poll_limits
    {
      max_options: PollValidator::MAX_OPTIONS,
      max_option_chars: PollValidator::MAX_OPTION_CHARS,
      min_expiration: PollValidator::MIN_EXPIRATION,
      max_expiration: PollValidator::MAX_EXPIRATION,
    }
  end

  def stats
    {
      user_count: instance_presenter.user_count,
      status_count: instance_presenter.status_count,
      domain_count: instance_presenter.domain_count,
    }
  end

  def urls
    { streaming_api: Rails.configuration.x.streaming_api_base_url }
  end

  def usage
    {
      users: {
        active_month: instance_presenter.active_user_count(4),
      },
    }
  end

  def configuration
    {
      statuses: {
        max_characters: StatusLengthValidator::MAX_CHARS,
        max_media_attachments: 4,
        characters_reserved_per_url: StatusLengthValidator::URL_PLACEHOLDER_CHARS,
      },

      media_attachments: {
        supported_mime_types: MediaAttachment::IMAGE_MIME_TYPES + MediaAttachment::VIDEO_MIME_TYPES + MediaAttachment::AUDIO_MIME_TYPES,
        image_size_limit: MediaAttachment::IMAGE_LIMIT,
        image_matrix_limit: Attachmentable::MAX_MATRIX_LIMIT,
        video_size_limit: MediaAttachment::VIDEO_LIMIT,
        video_frame_rate_limit: MediaAttachment::MAX_VIDEO_FRAME_RATE,
        video_matrix_limit: MediaAttachment::MAX_VIDEO_MATRIX_LIMIT,
      },

      polls: {
        max_options: PollValidator::MAX_OPTIONS,
        max_characters_per_option: PollValidator::MAX_OPTION_CHARS,
        min_expiration: PollValidator::MIN_EXPIRATION,
        max_expiration: PollValidator::MAX_EXPIRATION,
      },
    }
  end

  def registrations
    Setting.registrations_mode != 'none' && !Rails.configuration.x.single_user_mode
  end

  def approval_required
    Setting.registrations_mode == 'approved'
  end

  def invites_enabled
    UserRole.everyone.can?(:invite_users)
  end

  private

  def instance_presenter
    @instance_presenter ||= InstancePresenter.new
  end
end