;;; ox-conlang-tsx.el --- NextJS exporter for org-mode -*- lexical-binding: t -*-

;; Author: Lucien Cartier-Tilet <lucien@phundrak.com>
;; Maintainer: Lucien Cartier-Tilet <lucien@phundrak.com>
;; Version: 0.1.0
;; Package-Requires: ((emacs "26.1") (org "9.5"))
;; Homepage: https://labs.phundrak.com/phundrak/ox-conlang-tsx.el
;; Keywords: outlines


;; This file is not part of GNU Emacs

;; 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 <https://www.gnu.org/licenses/>.


;;; Commentary:

;; This package exports org files and buffers to a TSX format meant to
;; be used by NextJS (https://nextjs.org/).

;;; Code:

(require 'ox-publish)
(require 'ox-html)

(org-export-define-derived-backend 'conlang-tsx 'html
  :menu-entry
  '(?C "Conlang export"
       ((?T "To temporary buffer"
            (lambda (a s v _) (org-conlang-tsx-export-as-tsx a s v)))
        (?t "To TSX file"
            (lambda (a s v _) (org-conlang-tsx-export-to-tsx a s v)))
        (?o "To TSX file and open"
            (lambda (a s v b)
              (if a (org-conlang-tsx-export-to-tsx t s v)
                (org-open-file (org-conlang-tsx-export-to-tsx nil s v)))))))

  :options-alist
  '((:conlang-logo "LOGO" nil nil t))

  :translate-alist
  '((link . org-conlang-tsx-link)))



;; Transcode Functions

;; Links
(defun org-conlang-tsx-link (link desc info)
  "Transcode a LINK object from Org to TSX.
The link object is described by DESC and INFO."
  (let* ((html (org-html-link link desc info))
         (href-regex "href=\"\\([^\"]+\\)")
         (href (save-match-data
                 (string-match href-regex html)
                 (substring html (match-beginning 1) (match-end 1))))
         (a-link (replace-regexp-in-string " *href=\"[^\"]+\"" "" html)))
    (format "<Link href=\"%s\">%s</Link>" href a-link)))



;;; Interactive Functions

;;;###autoload
(defun org-conlang-tsx-export-as-tsx (&optional async subtreep visible-only)
  "Export current buffer to a Conlang flavored TSX buffer.

If narrowing is active in the current buffer, only export its
narrowed part.

If a region is active, export that region.

A non-nil optional argument ASYNC means the process should happen
asynchronously. The resulting buffer should be accessible through
the `org-export-stack' interface.

When optional argument SUBTREEP is non-nil, export the sub-tree
at point, extracting information from the headline properties
first.

When optional argument VISIBLE-ONLY is non-nil, don't export
contents of hidden elements.

Export is done in a buffer named \"*Org Conlang TSX Export*\",
which will be displayed when
`org-export-show-temporary-export-buffer' is non-nil."
  (interactive)
  (org-export-to-buffer 'conlang-tsx "*Org Conlang TSX Export*"
    async subtreep visible-only nil nil (lambda () (text-mode))))


;;;###autoload
(defun org-conlang-tsx-convert-region-to-tsx ()
  "Assume the current region has org-mode syntax, and convert it to Conlang flavored TSX.

This can be used in any buffer. For example, you can write an
itemized list in org-mode syntax in a TSX buffer and use
this command to convert it."
  (interactive)
  (org-export-replace-region-by 'conlang-tsx))


;;;###autoload
(defun org-conlang-tsx-export-to-tsx (&optional async subtreep visible-only ext-plist)
 "Export current buffer to a Conlang flavored TSX file.

If narrowing is active in the current buffer, only export its
narrowed part.

If a region is active, export that region.

A non-nil optional argument ASYNC means the process should happen
asynchronously. The resulting file should be accessible through
the `org-export-stack' interface.

When optional argument SUBTREEP is non-nil, export the sub-tree
at point, extracting information from the headline properties
first.

When optional argument VISIBLE-ONLY is non-nil, don't export
contents of hidden elements.

Return output file's name."
  (interactive)
  (let* ((outfile (org-export-output-file-name ".tsx" subtreep)))
    (org-export-to-file 'conlang-tsx outfile async subtreep visible-only)))

;;;###autoload
(defun org-conlang-tsx-publish-to-tsx (plist filename pub-dir)
  "Publish an org file to Conlang TSX.
FILENAME is the filename of the Org file to be published. PLIST
is the property list for the given project. PUB-DIR is the
publishing directory.
Return output file name."
  (org-publish-org-to 'conlang-tsx filename ".tsx" plist pub-dir))

(provide 'ox-conlang-tsx)

;;; ox-conlang-tsx.el ends here