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;;; Copyright © 2015 David Thompson <davet@gnu.org>
;;; Copyright © 2016 Christopher Allan Webber <cwebber@dustycloud.org>
;;; Copyright © 2023-2025 Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>
;;;
;;; This file is based on haunt/builder/blog.scm,
;;; haunt/reader/commonmark.scm and tests/post.scm and from Haunt
;;; 2.6.0.
;;;
;;; This file 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.
;;;
;;; Haunt 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 Haunt.  If not, see <http://www.gnu.org/licenses/>.

(define-module (website builders wordpress-compatible-links)
  #:use-module (haunt builder redirects)
  #:use-module (ice-9 rdelim)
  #:export (make-wordpress-compatible-links))

(fluid-set! %default-port-encoding "UTF-8")

(define (parse-line line)
  (define parts (string-split line #\/))
  (define year (list-ref parts 3))
  (define month (list-ref parts 4))
  (define page (list-ref parts 5))
  (define input
    (string-append "/" year "/" month "/" page "/index.html"))
  (define output
    (string-append "../../../" page ".html"))
  `((,input ,output)))

(define (make-read-file results)
  (define (read-file port)
    (define line (read-line port))
    (if (not (eof-object? line))
        ((lambda _
           (set! results (append results (parse-line line)))
           (read-file port)))
        results))
  read-file)

(define (make-wordpress-compatible-links path)
 (redirects (call-with-input-file path (make-read-file (list)))))