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;; webid-oidc, implementation of the Solid specification
;; Copyright (C) 2020, 2021 Vivien Kraus
;; This program is free software: you can redistribute it and/or modify
;; it under the terms of the GNU Affero 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 Affero General Public License for more details.
;; You should have received a copy of the GNU Affero General Public License
;; along with this program. If not, see <https://www.gnu.org/licenses/>.
(define-module (webid-oidc server resource content)
#:use-module (webid-oidc errors)
#:use-module ((webid-oidc stubs) #:prefix stubs:)
#:use-module (webid-oidc rdf-index)
#:use-module ((webid-oidc refresh-token) #:prefix refresh:)
#:use-module (web uri)
#:use-module (rnrs bytevectors)
#:use-module (ice-9 exceptions)
#:use-module (ice-9 receive)
#:use-module (ice-9 optargs)
#:use-module (ice-9 iconv)
#:use-module (ice-9 textual-ports)
#:use-module (ice-9 binary-ports)
#:use-module (rnrs bytevectors)
#:use-module (oop goops)
#:export
(
with-session
))
(define (default-dir)
(string-append (refresh:default-dir) "/server"))
(define-class <content> ()
(content-type #:init-keyword #:content-type #:getter content-type)
(contained #:init-keyword #:contained #:getter contained)
(static-content #:init-keyword #:static-content #:getter static-content))
(define (load-content session dir etag)
(let ((first-char (substring etag 0 1))
(rest (substring etag 1)))
(call-with-input-file (format #f "~a/content/~a/~a" dir first-char rest)
(lambda (port)
(let ((properties (read port)))
(set-port-encoding! port "ISO-8859-1")
(let ((ret
(make <content>
#:content-type (assq-ref properties 'content-type)
#:contained (assq-ref properties 'contained)
#:static-content
(string->bytevector (get-string-all port) "ISO-8859-1"))))
(hash-set! session etag ret)
ret))))))
(define (new-content session dir content-type contained static-content)
(when (string? static-content)
(set! static-content (string->utf8 static-content)))
(let ((etag (stubs:random 12)))
(let ((first-char (substring etag 0 1))
(rest (substring etag 1)))
(stubs:mkdir-p (format #f "~a/content/~a" dir first-char))
(let ((port (open (format #f "~a/content/~a/~a" dir first-char rest)
(logior O_WRONLY O_CREAT O_EXCL))))
(write `((content-type . ,content-type)
(contained . ,contained)) port)
(set-port-encoding! port "ISO-8859-1")
(display (bytevector->string static-content "ISO-8859-1") port)
(close-port port)
(hash-set! session
etag
(make <content>
#:content-type content-type
#:contained contained
#:static-content static-content))
etag))))
(define (delete-content dir etag)
(let ((first-char (substring etag 0 1))
(rest (substring etag 1)))
(delete-file (format #f "~a/content/~a/~a" dir first-char rest))))
(define* (with-session f #:key (dir default-dir))
(when (thunk? dir)
(set! dir (dir)))
(let ((session (make-hash-table)))
(define (do-load etag)
(or (hash-ref session etag)
(load-content session dir etag)))
(define (get-content-type etag)
(content-type (do-load etag)))
(define (get-contained etag)
(contained (do-load etag)))
(define (get-static-content etag)
(static-content (do-load etag)))
(define (do-create content-type contained static-content)
(new-content session dir content-type contained static-content))
(define (do-delete etag)
(delete-content dir etag))
(f get-content-type get-contained get-static-content do-create do-delete)))
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