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(.module:
  [library
   [lux #*
    ["_" test (#+ Test)]
    [abstract
     [monad (#+ do)]]
    [control
     ["." io (#+ IO)]
     ["." maybe ("#\." functor)]
     ["." try ("#\." monad)]
     ["." exception]
     ["." function]]
    [data
     ["." binary ("#\." equivalence)]
     ["." text ("#\." equivalence)
      ["%" format (#+ format)]
      [encoding
       ["." utf8]]]
     [collection
      ["." dictionary]]]
    [math
     ["." random (#+ Random)]]
    [world
     [net (#+ URL)
      ["." http #_
       ["#" client]
       ["#/." status]
       ["@#" /]]]]]]
  [\\program
   ["." /
    ["/#" // #_
     ["#." identity]]]])

(def: (url_body url)
  (-> URL (@http.Body IO))
  (let [url (\ utf8.codec encode url)]
    (function (_ _)
      (io.io (#try.Success [(binary.size url) url])))))

(def: (good_http user password)
  (-> //identity.User //identity.Password (http.Client IO))
  (implementation
   (def: (request method url headers input)
     (with_expansions [<failure> [http/status.bad_request
                                  {#@http.headers (http.headers (list))
                                   #@http.body (..url_body "")}]]
       (<| io.io
           #try.Success
           (if (|> headers
                   (dictionary.value "User-Agent")
                   (maybe\map (same? /.user_agent))
                   (maybe.else false))
             (case [method input]
               [#@http.Get #.None]
               [http/status.ok
                {#@http.headers (http.headers (list))
                 #@http.body (..url_body url)}]
               
               [#@http.Put (#.Some input)]
               (if (|> headers
                       (dictionary.value "Authorization")
                       (maybe\map (text\= (//identity.basic_auth user password)))
                       (maybe.else false))
                 [http/status.created
                  {#@http.headers (http.headers (list))
                   #@http.body (..url_body url)}]
                 <failure>)
               
               _
               <failure>)
             <failure>))))))

(def: bad_http
  (http.Client IO)
  (implementation
   (def: (request method url headers input)
     (<| io.io
         #try.Success
         [http/status.bad_request
          {#@http.headers (http.headers (list))
           #@http.body (..url_body "")}]))))

(def: .public test
  Test
  (<| (_.covering /._)
      (do {! random.monad}
        [address (random.ascii/upper 10)
         uri (random.ascii/lower 10)

         user (random.ascii/lower 10)
         password (random.ascii/lower 10)

         content (\ ! map (\ utf8.codec encode)
                    (random.ascii/lower 10))]
        ($_ _.and
            (_.cover [/.repository /.user_agent /.Address]
                     (let [repo (/.repository (..good_http user password)
                                              (#.Some {#//identity.user user
                                                       #//identity.password password})
                                              address)]
                       (and (|> (\ repo download uri)
                                io.run!
                                (try\map (\ utf8.codec decode))
                                try\join
                                (try\map (text\= (format address uri)))
                                (try.else false))
                            (|> (\ repo upload uri content)
                                io.run!
                                (try\map (function.constant true))
                                (try.else false)))))
            (_.cover [/.upload_failure]
                     (let [repo (/.repository (..good_http user password)
                                              #.None
                                              address)]
                       (case (io.run! (\ repo upload uri content))
                         (#try.Failure error)
                         (exception.match? /.upload_failure error)
                         
                         (#try.Success _)
                         false)))
            (_.cover [/.download_failure]
                     (let [repo (/.repository ..bad_http
                                              #.None
                                              address)]
                       (case (io.run! (\ repo download uri))
                         (#try.Failure error)
                         (exception.match? /.download_failure error)
                         
                         (#try.Success _)
                         false)))
            ))))