102 lines
2.5 KiB
Scheme
102 lines
2.5 KiB
Scheme
;;
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;; api-servlets.scm
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;;
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;; All servlets in one place.
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;;
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;; ISC License
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;;
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;; Copyright 2023-2025 Brmlab, z.s.
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;; Dominik Pantůček <dominik.pantucek@trustica.cz>
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;;
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;; Permission to use, copy, modify, and/or distribute this software
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;; for any purpose with or without fee is hereby granted, provided
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;; that the above copyright notice and this permission notice appear
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;; in all copies.
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;;
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;; THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
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;; WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
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;; WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
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;; AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
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;; CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
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;; OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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;; NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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;; CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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;;
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(declare (unit api-servlets))
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(module
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api-servlets
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(
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api-dispatch
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)
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(import scheme
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spiffy
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(chicken format)
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bar-db
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json
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(chicken port)
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(chicken base))
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(define-syntax try-match-lambda1
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(syntax-rules ()
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((_ pp plst ((arg ->conv) . args) body)
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(let ((as (->conv pp)))
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(cond (as
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(let ((arg as))
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(try-match-lambda0 plst args body)))
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(else
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#f))))
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((_ pp plst (lit . args) body)
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(if (equal? pp lit)
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(try-match-lambda0 plst args body)
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#f))))
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(define-syntax try-match-lambda0
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(syntax-rules ()
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((_ plst () (expr ...))
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(let ()
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expr ...
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#t))
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((_ plst (arg . args) body)
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(cond ((null? plst)
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#f)
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(else
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(let ((pp (car plst)))
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(try-match-lambda1 pp (cdr plst) (arg . args) body)))))))
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(define-syntax try-match-lambda
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(syntax-rules ()
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((_ args . body)
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(lambda (plst)
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(try-match-lambda0 plst args body)))))
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(define-syntax define-try-match
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(syntax-rules ()
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((_ (name . args) . body)
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(define name (try-match-lambda args . body)))))
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(define (alist->json-string alst)
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(with-output-to-string
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(lambda ()
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(json-write
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(list->vector alst)))))
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(define-try-match (account-barcode-info "barcode" (barcode identity))
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(send-response
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#:body (alist->json-string
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`((amount . ,(bd-barcode-lookup barcode))))))
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(define api-servlets
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(list account-barcode-info))
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(define (api-dispatch plst)
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(let loop ((as api-servlets))
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(if (null? as)
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#f
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(if ((car as) plst)
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#t
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(loop (cdr as))))))
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)
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