88 lines
3.3 KiB
Scheme
88 lines
3.3 KiB
Scheme
(define-module (gib-gab-gob rps)
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#:use-module (ice-9 match)
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#:use-module (goblins)
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#:use-module (goblins actor-lib methods)
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#:use-module (goblins actor-lib sealers)
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#:use-module (goblins ocapn captp)
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#:use-module (goblins ocapn ids)
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#:use-module (goblins ocapn netlayer onion)
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#:export (make-initiator make-joiner initiator/connect resolve-initiator ^game-initiator ^game-joiner))
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;;
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;; Initiator logic
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;;
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;; todo: refactor?
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(define (make-initiator ^game-controller)
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(with-vat (spawn-vat)
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(define initiator (spawn ^game-initiator ^game-controller))
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(define mycapn (spawn-mycapn (new-onion-netlayer)))
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(define init-sref ($ mycapn 'register initiator 'testuds))
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(format #t "Connect to: ~a\n" (ocapn-id->string init-sref))))
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;; use this one
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(define (initiator/connect initiator)
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(define mycapn (spawn-mycapn (new-onion-netlayer)))
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(define init-sref ($ mycapn 'register initiator 'onion))
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(format #t "Connect to: ~a\n" (ocapn-id->string init-sref)))
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(define (^game-initiator bcom ^game-controller)
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(define pick (pick-rps))
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(define won? #nil)
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(define peer #nil)
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(methods
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[(register-opponent p sealed-pick)
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(set! peer p)
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(format #t "Hey there! You sent me your pick of rock-paper-scissors; now I will send mine.\n")
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(on (<- (<- peer 'pick->unsealer pick) sealed-pick)
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(λ (peer-pick)
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(set! won? (rps-winner pick peer-pick))
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(format #t "Opponent has picked ~a (do I win? ~a). Ready to be a controller.\n" peer-pick won?)))]
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[(try-transition)
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(if (eq? won? #nil)
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'connecting
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(bcom (^game-controller bcom won? peer) 'ready-to-play))]))
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;;
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;; Joiner logic
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;;
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(define (make-joiner ^game-controller addr)
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(define mycapn (spawn-mycapn (new-onion-netlayer)))
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(define init-sref (string->ocapn-id addr))
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(define initiator ($ mycapn 'enliven init-sref))
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(define joiner (spawn ^game-joiner initiator ^game-controller))
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(on (<- initiator 'register-opponent joiner ($ joiner 'get-sealed-pick))
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(lambda (_) (<- initiator 'try-transition)))
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joiner)
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(define (^game-joiner bcom initiator ^game-controller)
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(define-values (seal-pick unseal-pick my-pick?)
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(spawn-sealer-triplet))
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(define pick (pick-rps))
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(methods
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[(get-sealed-pick) ($ seal-pick pick)]
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[(pick->unsealer peer-pick)
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(define won? (rps-winner pick peer-pick))
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(format #t "Peer picked ~a... a bold choice (do I win? ~a), I will become a controller and send my unsealer.\n" peer-pick won?)
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;; We make the assumption that initiator is to become a controller.
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;; Note second arg to bcom which will return the value (this is confusing to me)
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;; see https://spritely.institute/files/docs/guile-goblins/0.11.0/Object-construction.html
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(bcom (^game-controller bcom won? initiator) unseal-pick)]))
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;;
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;; Standard rock paper scissors logic follows!
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;;
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(define rock-paper-scissors (list 'rock 'paper 'scissors))
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(define (pick-rps)
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(list-ref rock-paper-scissors (random (length rock-paper-scissors))))
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(define (rps-winner a b)
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(if (and (memq a rock-paper-scissors) (memq b rock-paper-scissors))
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(match (list a b)
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[(x x) 'tie]
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[('rock 'scissors) #t]
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[('rock 'paper) #f]
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[('scissors 'paper) #t]
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[(x y) (not (rps-winner y x))])
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(error "Unexpected item in the shooting area" a b)))
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