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# frozen_string_literal: true
class Pubsubhubbub::SubscribeService < BaseService
URL_PATTERN = /\A#{URI.regexp(%w(http https))}\z/
attr_reader :account, :callback, :secret,
:lease_seconds, :domain
def call(account, callback, secret, lease_seconds, verified_domain = nil)
@account = account
@callback = Addressable::URI.parse(callback).normalize.to_s
@secret = secret
@lease_seconds = lease_seconds
@domain = verified_domain
process_subscribe
end
private
def process_subscribe
if account.nil?
['Invalid topic URL', 422]
elsif !valid_callback?
['Invalid callback URL', 422]
elsif blocked_domain?
['Callback URL not allowed', 403]
else
confirm_subscription
['', 202]
end
end
def confirm_subscription
subscription = locate_subscription
Pubsubhubbub::ConfirmationWorker.perform_async(subscription.id, 'subscribe', secret, lease_seconds)
end
def valid_callback?
callback.present? && callback =~ URL_PATTERN
end
def blocked_domain?
DomainBlock.blocked? Addressable::URI.parse(callback).host
end
def locate_subscription
subscription = Subscription.find_or_initialize_by(account: account, callback_url: callback)
subscription.domain = domain
subscription.save!
subscription
end
end
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