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class FollowRemoteUserService
include GrapeRouteHelpers::NamedRouteMatcher
def call(user)
username, domain = user.split('@')
account = Account.where(username: username, domain: domain).first
return account unless account.nil?
account = Account.new(username: username, domain: domain)
data = Goldfinger.finger("acct:#{user}")
account.remote_url = data.link('http://schemas.google.com/g/2010#updates-from').href
account.salmon_url = data.link('salmon').href
account.public_key = magic_key_to_pem(data.link('magic-public-key').href)
account.private_key = nil
account.secret = SecureRandom.hex
account.verify_token = SecureRandom.hex
feed = get_feed(account.remote_url)
hubs = feed.xpath('//xmlns:link[@rel="hub"]')
return false if hubs.empty? || hubs.first.attribute('href').nil?
account.hub_url = hubs.first.attribute('href').value
account.save!
subscription = account.subscription(subscription_url(account))
subscription.subscribe
rescue Goldfinger::Error, HTTP::Error => e
false
end
private
def get_feed(url)
response = http_client.get(Addressable::URI.parse(url))
Nokogiri::XML(response)
end
def magic_key_to_pem(magic_key)
_, modulus, exponent = magic_key.split('.')
modulus, exponent = [modulus, exponent].map { |n| Base64.urlsafe_decode64(n).bytes.inject(0) { |num, byte| (num << 8) | byte } }
key = OpenSSL::PKey::RSA.new
key.n = modulus
key.d = exponent
key.to_pem
end
def http_client
HTTP
end
def subscription_url(account)
"https://649841dc.ngrok.io/api#{subscriptions_path(id: account.id)}"
end
end
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