;;; ox-hugocv.el --- LaTeX hugocv Back-End for Org Export Engine -*- lexical-binding: t; -*-

;; Copyright (C) 2018 Free Software Foundation, Inc.

;; Author: Oscar Najera <hi AT oscarnajera.com DOT com>
;; Keywords: org, wp, tex

;; 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, 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 GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.

;;; Commentary:
;;
;; This library implements a LaTeX hugocv back-end, derived from the
;; LaTeX one.

;;; Code:
(require 'ox-hugo)
(require 'org-cv-utils)

;;; User-Configurable Variables

(defgroup org-export-hugocv nil
  "Options for exporting Org mode files to Hugo-compatible Markdown"
  :tag "Org Export Hugo CV"
  :group 'org-export
  :version "25.3")

;;; Define Back-End
(org-export-define-derived-backend 'hugocv 'hugo
  :options-alist
  '(
    (:mobile "MOBILE" nil nil parse)
    (:homepage "HOMEPAGE" nil nil parse)
    (:address "ADDRESS" nil nil newline)
    (:photo "PHOTO" nil nil parse)
    (:with-email nil "email" t t)
    )
  :translate-alist '((headline . org-hugocv-headline)
                     (inner-template . org-hugocv-inner-template)))

(setq org-hugocv--recognized-social-networks
  '((:url "https://www.github.com/"
          :icon "fa-github")
    (:url "https://www.gitlab.com/"
          :icon "fa-gitlab")
    (:url "https://www.linkedin.com/in/"
          :icon "fa-linkedin")
    (:url "https://twitter.com/"
          :icon "fa-twitter")
    (:url "https://facebook.com/"
          :icon "fa-facebook")
    (:url "https://www.instagram.com/"
          :icon "fa-instagram")))

(defun org-hugocv--crop-edges (x)
  "String is <X> so remove first and last chars."
  (let ((le (- (length x) 1)))
    (substring x 1 le)))

(defun org-hugocv--format-cventry (headline contents info)
  "Format HEADLINE as as cventry.
CONTENTS holds the contents of the headline.  INFO is a plist used
as a communication channel."
  (let* ((entry (org-cv-utils--parse-cventry headline info))
         (loffset (string-to-number (plist-get info :hugo-level-offset))) ;"" -> 0, "0" -> 0, "1" -> 1, ..
         (level (org-export-get-relative-level headline info))
         (title (concat (make-string (+ loffset level) ?#) " " (alist-get 'title entry))))
    (format "\n%s

<ul class=\"cventry\">
    <li class=\"fa fa-building\"> %s</li>
    <li class=\"fa fa-map-marker\"> %s</li>
    <li class=\"fa fa-calendar\"> %s</li>
</ul>

%s
" title
(alist-get 'employer entry)
(alist-get 'location entry)
(org-cv-utils--format-time-window (alist-get 'from-date entry) (alist-get 'to-date entry))
contents)))


(defun social-entry (icon url handle)
  (let* ((nw-handle (string-trim handle))
         (icon-wrap (if (org-string-nw-p icon)
                        (format "<i class=\"fa %s\"> %s</i>" icon nw-handle) nw-handle)))
    (format "<a href=\"%s%s\">%s</a>" url nw-handle icon-wrap)))

(defun org-hugocv--unknown-social-channels (headline contents info)
  (let ((icon (org-export-data (org-element-property :ICON headline) info))
        (url (org-export-data (org-element-property :URL headline) info))
        (handle (org-export-data contents info)))
    (concat
     (if (org-string-nw-p icon) ""
       (concat (org-export-data (org-element-property :title headline) info) " : "))
     (social-entry icon url handle))))

(defun org-hugocv--pick-social-network (channel contents)
  (-any (lambda (network)
          (when (string-match-p channel (plist-get network :url))
            (social-entry (plist-get network :icon)
                          (plist-get network :url)
                          contents)))
        recognized-social-networks))

(defun org-hugocv--format-socialchannels (headline contents info)
  (let* ((channel (downcase (org-export-data (org-element-property :title headline) info)))
         (entry (org-hugocv--pick-social-network channel contents)))
    (cond (entry entry)
          ((org-element-property :URL headline)
           (org-hugocv--unknown-social-channels headline contents info))
          ((org-export-with-backend 'hugo headline contents info)))))

;;;; Headline
(defun org-hugocv-headline (headline contents info)
  "Transcode HEADLINE element into hugocv code.
CONTENTS is the contents of the headline.  INFO is a plist used
as a communication channel."
  (unless (org-element-property :footnote-section-p headline)
    (let ((environment (let ((env (org-export-get-category headline info)))
                         (or (org-string-nw-p env) "block"))))
      (cond
       ;; is a cv entry
       ((equal environment "cventry")
        (org-hugocv--format-cventry headline contents info))
       ((equal environment "social")
        (org-hugocv--format-socialchannels headline contents info))
       ((org-export-with-backend 'hugo headline contents info))))))

(defun org-hugocv-inner-template (contents info)
  "Return body of document after converting it to Hugo-compatible Markdown.
CONTENTS is the transcoded contents string.  INFO is a plist
holding export options."
    (concat "<ul id=\"cvcontacts\">\n"
            ;; email
            (let ((email (and (plist-get info :with-email)
                              (org-export-data (plist-get info :email) info))))
              (when (org-string-nw-p email)
                (social-entry "fa-envelope" "mailto:" email)))
            ;; homepage
            (let ((homepage (org-hugocv--crop-edges (org-export-data (plist-get info :homepage) info))))
              (when (org-string-nw-p homepage)
                (social-entry "fa-globe" "" homepage)))
            "</ul>\n\n"
            (org-hugo-inner-template contents info)))


(provide 'ox-hugocv)
;;; ox-hugocv ends here