mastodon/app/lib/webfinger_resource.rb

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# frozen_string_literal: true
class WebfingerResource
attr_reader :resource
class InvalidRequest < StandardError; end
def initialize(resource)
@resource = resource
end
def username
case resource
when %r{\A(https?://)?#{instance_actor_regexp}/?\Z}
Rails.configuration.x.local_domain
when /\Ahttps?/i
username_from_url
when /@/
username_from_acct
else
raise InvalidRequest
end
end
private
def instance_actor_regexp
hosts = [Rails.configuration.x.local_domain, Rails.configuration.x.web_domain]
hosts.concat(Rails.configuration.x.alternate_domains) if Rails.configuration.x.alternate_domains.present?
Regexp.union(hosts)
end
def username_from_url
if account_show_page?
path_params[:username]
elsif instance_actor_page?
Rails.configuration.x.local_domain
else
raise ActiveRecord::RecordNotFound
end
end
def instance_actor_page?
path_params[:controller] == 'instance_actors'
end
def account_show_page?
path_params[:controller] == 'accounts' && path_params[:action] == 'show'
end
def path_params
Rails.application.routes.recognize_path(resource)
end
def username_from_acct
if domain_matches_local?
local_username
else
raise ActiveRecord::RecordNotFound
end
end
def split_acct
resource_without_acct_string.split('@')
end
def resource_without_acct_string
resource.delete_prefix('acct:')
end
def local_username
split_acct.first
end
def local_domain
split_acct.last
end
def domain_matches_local?
TagManager.instance.local_domain?(local_domain) || TagManager.instance.web_domain?(local_domain)
end
end