syndicate-2017/examples/webchat/server/account.rkt

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#lang syndicate/actor
(require racket/set)
(require/activate syndicate/reload)
(require "protocol.rkt")
(actor #:name 'account-manager
(stop-when-reloaded)
(define/query-set accounts (account $e) e)
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(on (message (create-resource (account $e)))
(when (not (set-member? (accounts) e))
(spawn-account e)))
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(on (asserted (session $email _))
(when (not (set-member? (accounts) email))
(spawn-account email))))
(define (spawn-account email)
(actor #:name (list 'account email)
(stop-when-reloaded)
(on-start (log-info "Account ~s created." email))
(on-stop (log-info "Account ~s deleted." email))
(assert (account email))
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(assert (grant email email email (p:follow email) #t))
(stop-when (message (delete-resource (account email))))))