(.module:
  [library
   [lux #*
    ["." ffi (#+ import:)]
    [abstract
     [equivalence (#+ Equivalence)]]
    [data
     ["." product]
     ["." text
      ["%" format (#+ format)]
      [encoding
       ["." utf8]]]]]])

(type: .public User
  Text)

(type: .public Password
  Text)

(type: .public Identity
  {#user User
   #password Password})

(def: .public equivalence
  (Equivalence Identity)
  ($_ product.equivalence
      text.equivalence
      text.equivalence
      ))

(import: java/util/Base64$Encoder
  ["#::."
   (encodeToString [[byte]] java/lang/String)])

(import: java/util/Base64
  ["#::."
   (#static getEncoder [] java/util/Base64$Encoder)])

(def: .public (basic_auth user password)
  (-> User Password Text)
  (let [credentials (\ utf8.codec encoded (format user ":" password))]
    (|> (java/util/Base64::getEncoder)
        (java/util/Base64$Encoder::encodeToString credentials)
        (format "Basic "))))