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(.using
 [library
  [lux "*"
   ["[0]" ffi {"+" import:}]
   [abstract
    [equivalence {"+" Equivalence}]]
   [data
    ["[0]" product]
    ["[0]" text
     ["%" format {"+" format}]
     [encoding
      ["[0]" utf8]]]]]])

(type: .public User
  Text)

(type: .public Password
  Text)

(type: .public Identity
  (Record
   [#user User
    #password Password]))

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

(import: java/util/Base64$Encoder
  ["[1]::[0]"
   (encodeToString [[byte]] java/lang/String)])

(import: java/util/Base64
  ["[1]::[0]"
   ("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)
        ffi.of_string
        (format "Basic "))))