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;;; Copyright © 2019 - 2022 Jakob L. Kreuze <zerodaysfordays@sdf.org>
;;;
;;; This program is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU General Public License as
;;; published by the Free Software Foundation; either version 3 of the
;;; License, or (at your option) any later version.
;;;
;;; This program is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;; General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with this program. If not, see
;;; <http://www.gnu.org/licenses/>.
(use-modules (dynamic capabilities comment-form)
(dynamic capabilities comments)
(dynamic capabilities gallery)
(dynamic capabilities rsvp)
(dynamic logging)
(srfi srfi-1)
(ice-9 match)
(web server)
(web request)
(web response)
(web uri))
(define (not-found request)
"Build a (somewhat) descriptive response for a non-existent resource."
(values (build-response #:code 404)
(string-append "Resource not found: "
(uri->string (request-uri request)))))
(define (handle-api-request request body endpoint)
"Route handler for the API server."
(let ((method (request-method request))
(originating-ip (assoc-ref (request-headers request) 'X-Forwarded-For))
(args (uri-query (request-uri request))))
(log-append! 'info (format #f "~a ~a (~a) (~a)" method endpoint args originating-ip)))
((match (cons (request-method request) endpoint)
('(GET "dynamic" "comment-form") get-comment-form)
('(GET "challenge") make-challenge)
('(GET "api" "comments") get-comments)
('(POST "api" "comment") put-comment)
('(POST "api" "react") put-reaction)
('(GET "api" "gallery") get-gallery)
('(GET "api" "gallery" "image") get-image)
('(GET "api" "rsvp" "event-info") get-event-info)
('(POST "api" "rsvp") post-event-rsvp)
(_ (lambda (. args) (not-found request))))
request body))
(define (main-request-handler request body)
"Server entry-point; parse `request' and defer to routing system."
(define (wrap-response response)
;; This is either a response, or an alist of headers. The latter case is
;; simple to handle, but the former requires us to do a (rather unweildy)
;; copy of the response to inject our headers.
(if (response? response)
(build-response
#:version (response-version response)
#:code (response-code response)
#:reason-phrase (response-reason-phrase response)
#:headers (cons '(Access-Control-Allow-Origin . "*")
(response-headers response))
#:port (response-port response)
#:validate-headers? #t)
(cons '(Access-Control-Allow-Origin . "*") response)))
(let* ((path-encoded (uri-path (request-uri request)))
(path (split-and-decode-uri-path path-encoded)))
(define-values (response resp-body)
(if (or (string= "api" (first path))
(string= "dynamic" (first path)))
;; (handle-api-request request body (drop path 1))
(handle-api-request request body path)
(not-found request)))
(values (wrap-response response) resp-body)))
(run-server main-request-handler 'http `(#:addr ,INADDR_ANY #:port 8080))
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