86 lines
3.0 KiB
Scheme
86 lines
3.0 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 testuds)
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#:export (make-host make-client))
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;;
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;; Helper to use testuds netlayer
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;;
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(define (new-testuds-netlayer)
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(define tmp "/tmp/netlayers")
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(unless (access? tmp X_OK) (mkdir tmp))
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(spawn ^testuds-netlayer tmp))
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;;
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;; Host logic
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;;
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(define (make-host ^game-controller)
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(with-vat (spawn-vat)
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(define lobby (spawn ^game-lobby ^game-controller))
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(define mycapn (spawn-mycapn (new-testuds-netlayer)))
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(define lobby-sref ($ mycapn 'register lobby 'testuds))
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(format #t "Connect to: ~a\n" (ocapn-id->string lobby-sref))))
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(define (^game-lobby bcom ^game-controller)
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(define pick (pick-rps))
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(methods
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[(register-opponent name peer sealed-pick)
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(format #t "Hey there, ~a! You sent me your pick of rock-paper-scissors; now I will send mine.\n" name)
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(on (<- (<- peer 'pick->unsealer pick) sealed-pick)
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(λ (peer-pick)
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(define won? (rps-winner pick peer-pick))
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(format #t "Opponent ~a has picked ~a (do I win? ~a). Time to be a controller.\n" name peer-pick won?)
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(bcom (^game-controller bcom won? peer))))]))
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;;
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;; Client logic
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;;
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(define (make-client ^game-controller user-name addr)
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(pk user-name)
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(pk addr)
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(pk ^game-controller)
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(with-vat (spawn-vat)
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(define mycapn (spawn-mycapn (new-testuds-netlayer)))
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(define lobby-sref (string->ocapn-id addr))
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(define lobby ($ mycapn 'enliven lobby-sref))
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(define client-picker (spawn ^client-picker lobby ^game-controller))
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(on (<- lobby 'register-opponent user-name client-picker ($ client-picker 'get-sealed-pick))
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(λ (_) (format #t "~a finished the game.\n" user-name)))))
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(define (^client-picker bcom lobby ^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 lobby is to become a controller.
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(bcom (^game-controller bcom won? lobby))
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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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