;;; Nani Project website
;;; Copyright © 2021 Julien Lepiller <julien@lepiller.eu>
;;;
;;; This file is part of the Nani Project website.
;;;
;;; The Nani Project website 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.
;;;
;;; The Nani Project website 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 the Nani Project website.  If not, see <http://www.gnu.org/licenses/>.

(use-modules (nani kanji kanjivg))
(use-modules (ice-9 match))
(use-modules (ice-9 binary-ports))

(define (get-files directory)
  (let loop ((dir (opendir (string-append directory "/kanji/"))) (svgs '()))
    (let ((entry (readdir dir)))
      (cond
        ((eof-object? entry) svgs)
        ((string-contains entry "-") (loop dir svgs))
        ((string-prefix? "000" entry) (loop dir svgs))
        ((string-suffix? ".svg" entry)
         (loop dir (cons (string-append directory "/kanji/" entry) svgs)))
        (else (loop dir svgs))))))

(match (command-line)
  ((_ cmd kanjivg-dir output)
   (cond
    ((equal? cmd "build")
     (let* ((results
              (map
                (lambda (file)
                  (call-with-input-file file
                    (lambda (port)
                      (let ((r (xml->kanji port)))
                        (unless (kanji-kanji r)
                          (pk 'no-kanji file))
                        r))))
                (sort (get-files kanjivg-dir) string<?))))
       (call-with-output-file output
         (lambda (port)
           (put-bytevector port
             (serialize-kanjivg (filter
                                  (lambda (r) (kanji-kanji r))
                                  results)))))))
    (else (format #t "Unknown cmd ~a.~%" cmd)))))