;;; ox-md-pandoc-zotero.el --- Export org citations to md and then to zotero formats via pandoc  -*- lexical-binding: t; -*-

;; Copyright (C) 2021  Anders Johansson

;; Author: Anders Johansson <mejlaandersj@gmail.com>
;; Created: 2021-06-23
;; Modified: 2021-06-23
;; Keywords: org, wp

;; 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:

;;

;;; Code:

(require 'ox-md)

(defgroup ox-md-pandoc-zotero nil
  "Customization for org export to zotero via pandoc md."
  :group 'org-export)

(defcustom ox-md-pandoc-path-to-bbt-filter ""
  "Path to the betterbibtex pandoc filter for converting md to zotero odt/word.

Latest file should be here:
https://raw.githubusercontent.com/retorquere/zotero-better-bibtex/master/site/content/exporting/zotero.lua"
  :type 'file)

(defcustom ox-md-pandoc-format "odt"
  "Final export format. odt or docx."
  :type '(choice
          (const "odt")
          (const "docx")))

(defcustom ox-md-pandoc-style "apa"
  "File to set in zotero output file. A valid csl style."
  :type 'string)

(org-export-define-derived-backend 'md-pandoc-zotero 'md
  :menu-entry
  '(?p "MD→pandoc zotero export"
       ((?z "As zotero odt" ox-md-pandoc-zotero-odt))))

(defun ox-md-pandoc-zotero-odt (async subtreep visible-only body-only)
  "Export to md and then to odt with pandoc and zotero-better-bibtex filter."
  (interactive)
  (let ((outfile (org-export-output-file-name ".md" subtreep)))
    (org-export-to-file 'md outfile async subtreep visible-only body-only nil
                        #'ox-md-pandoc-process-zotero-wpfile)))

(defun ox-md-pandoc-process-zotero-wpfile (file)
  "Process markdown FILE to zotero odt or docx."
  (org-open-file
   (org-compile-file
    file
    (list
     (format
      "pandoc -s -o %%b.%s --lua-filter=%s --metadata=zotero_author_in_text=true --metadata=zotero_csl_style=%s %%f"
      ox-md-pandoc-format
      ox-md-pandoc-path-to-bbt-filter
      ox-md-pandoc-style))
    ox-md-pandoc-format
    "See *ox-md-pandoc-zotero output* for details"
    (get-buffer-create "*ox-md-pandoc-zotero output*"))))


(provide 'ox-md-pandoc-zotero)
;;; ox-md-pandoc-zotero.el ends here