125 lines
3.5 KiB
Ruby
125 lines
3.5 KiB
Ruby
# frozen_string_literal: true
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class ResolveURLService < BaseService
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include JsonLdHelper
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include Authorization
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USERNAME_STATUS_RE = %r{/@(?<username>#{Account::USERNAME_RE})/(?<status_id>[0-9]+)\Z}
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def call(url, on_behalf_of: nil)
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@url = url
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@on_behalf_of = on_behalf_of
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if local_url?
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process_local_url
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elsif !fetched_resource.nil?
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process_url
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else
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process_url_from_db
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end
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end
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private
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def process_url
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if equals_or_includes_any?(type, ActivityPub::FetchRemoteActorService::SUPPORTED_TYPES)
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ActivityPub::FetchRemoteActorService.new.call(resource_url, prefetched_body: body)
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elsif equals_or_includes_any?(type, ActivityPub::Activity::Create::SUPPORTED_TYPES + ActivityPub::Activity::Create::CONVERTED_TYPES)
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status = FetchRemoteStatusService.new.call(resource_url, prefetched_body: body)
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authorize_with @on_behalf_of, status, :show? unless status.nil?
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status
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end
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end
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def process_url_from_db
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if [500, 502, 503, 504, nil].include?(fetch_resource_service.response_code)
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account = Account.find_by(uri: @url)
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return account unless account.nil?
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end
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return unless @on_behalf_of.present? && [401, 403, 404].include?(fetch_resource_service.response_code)
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# It may happen that the resource is a private toot, and thus not fetchable,
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# but we can return the toot if we already know about it.
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scope = Status.where(uri: @url)
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# We don't have an index on `url`, so try guessing the `uri` from `url`
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parsed_url = Addressable::URI.parse(@url)
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parsed_url.path.match(USERNAME_STATUS_RE) do |matched|
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parsed_url.path = "/users/#{matched[:username]}/statuses/#{matched[:status_id]}"
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scope = scope.or(Status.where(uri: parsed_url.to_s, url: @url))
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end
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status = scope.first
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authorize_with @on_behalf_of, status, :show? unless status.nil?
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status
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rescue Mastodon::NotPermittedError
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nil
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end
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def fetched_resource
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@fetched_resource ||= fetch_resource_service.call(@url)
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end
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def fetch_resource_service
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@_fetch_resource_service ||= FetchResourceService.new
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end
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def resource_url
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fetched_resource.first
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end
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def body
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fetched_resource.second[:prefetched_body]
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end
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def type
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json_data['type']
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end
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def json_data
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@json_data ||= body_to_json(body)
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end
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def local_url?
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TagManager.instance.local_url?(@url)
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end
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def process_local_url
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recognized_params = Rails.application.routes.recognize_path(@url)
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case recognized_params[:controller]
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when 'statuses'
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return unless recognized_params[:action] == 'show'
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status = Status.find_by(id: recognized_params[:id])
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check_local_status(status)
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when 'accounts'
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return unless recognized_params[:action] == 'show'
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Account.find_local(recognized_params[:username])
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when 'home'
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return unless recognized_params[:action] == 'index' && recognized_params[:username_with_domain].present?
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if recognized_params[:any]&.match?(/\A[0-9]+\Z/)
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status = Status.find_by(id: recognized_params[:any])
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check_local_status(status)
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elsif recognized_params[:any].blank?
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username, domain = recognized_params[:username_with_domain].gsub(/\A@/, '').split('@')
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return unless username.present? && domain.present?
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Account.find_remote(username, domain)
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end
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end
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end
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def check_local_status(status)
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return if status.nil?
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authorize_with @on_behalf_of, status, :show?
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status
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rescue Mastodon::NotPermittedError
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nil
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end
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end
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