mastodon/app/models/remote_follow.rb

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# frozen_string_literal: true
class RemoteFollow
include ActiveModel::Validations
include RoutingHelper
include WebfingerHelper
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attr_accessor :acct, :addressable_template
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validates :acct, presence: true, domain: { acct: true }
def initialize(attrs = {})
@acct = normalize_acct(attrs[:acct])
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end
def valid?
return false unless super
fetch_template!
errors.empty?
end
def subscribe_address_for(account)
addressable_template.expand(uri: ActivityPub::TagManager.instance.uri_for(account)).to_s
end
def interact_address_for(status)
addressable_template.expand(uri: ActivityPub::TagManager.instance.uri_for(status)).to_s
end
private
def normalize_acct(value)
return if value.blank?
username, domain = value.strip.gsub(/\A@/, '').split('@')
domain = if TagManager.instance.local_domain?(domain)
nil
else
TagManager.instance.normalize_domain(domain)
end
[username, domain].compact.join('@')
rescue Addressable::URI::InvalidURIError
value
end
def fetch_template!
return missing_resource_error if acct.blank?
_, domain = acct.split('@')
if domain.nil?
@addressable_template = Addressable::Template.new("#{authorize_interaction_url}?uri={uri}")
elsif redirect_uri_template.nil?
missing_resource_error
else
@addressable_template = Addressable::Template.new(redirect_uri_template)
end
end
def redirect_uri_template
acct_resource&.link('http://ostatus.org/schema/1.0/subscribe', 'template')
end
def acct_resource
@acct_resource ||= webfinger!("acct:#{acct}")
rescue Webfinger::Error, HTTP::ConnectionError
nil
end
def missing_resource_error
errors.add(:acct, I18n.t('remote_follow.missing_resource'))
end
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end