2017-08-10 19:17:28 +00:00
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#lang syndicate
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2016-01-13 16:35:03 +00:00
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2016-07-30 17:02:07 +00:00
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(require syndicate/protocol/advertise)
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2016-07-12 19:05:56 +00:00
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(require/activate syndicate/drivers/tcp)
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2016-01-13 16:35:03 +00:00
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(require (only-in racket/string string-trim))
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(struct says (who what) #:prefab)
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(struct present (who) #:prefab)
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2017-09-25 22:52:29 +00:00
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(define us (tcp-listener 5999))
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(dataspace (spawn (assert (outbound (advertise (observe (tcp-channel _ us _)))))
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(during/spawn (inbound (advertise (tcp-channel $them us _)))
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(assert (outbound (advertise (tcp-channel us them _))))
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2017-03-14 22:29:45 +00:00
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2017-09-25 22:52:29 +00:00
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(define (send-to-remote fmt . vs)
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(send! (outbound (tcp-channel us them (string->bytes/utf-8 (apply format fmt vs))))))
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2017-03-14 22:29:45 +00:00
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2017-09-25 22:52:29 +00:00
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(define user (gensym 'user))
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2017-03-14 22:29:45 +00:00
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2017-09-25 22:52:29 +00:00
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(on-start (send-to-remote "Welcome, ~a.\n" user))
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(assert (present user))
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(on (message (inbound (tcp-channel them us $bs)))
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(send! (says user (string-trim (bytes->string/utf-8 bs)))))
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2017-03-14 22:29:45 +00:00
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2017-09-25 22:52:29 +00:00
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(during (present $who)
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(unless (equal? who user)
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(on-start (send-to-remote "~a arrived.\n" who))
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(on-stop (send-to-remote "~a departed.\n" who))
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(on (message (says who $what)) (send-to-remote "~a says: ~a\n" who what)))))))
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