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;; -*- lexical-binding: t; -*-

;;; latex packages

(setq org-latex-packages-alist '(("" "amsfonts" t))
      ;; org-format-latex-options (plist-put org-format-latex-options :scale 1.5)
      )

;;; org-export

(require 'ox)

;;; org capture bookmark

(setq org-capture-bookmark nil)

;;; org adapt indentation

(setq org-adapt-indentation nil)

;;; org modules
(setq org-modules '(ol-gnus ol-info ol-eww))

;;; Hide unnecessary decorations
(setq org-hide-emphasis-markers nil)
(setq org-hide-macro-markers nil)
(setq org-hide-leading-stars nil)

;;; follow link on return
(setq org-return-follows-link t)

;;; org-element

(require 'org-element)

;;; org-clock

(require 'org-clock)

;;; tempo

(require 'org-tempo)

(add-to-list 'org-structure-template-alist (cons "g" "src durand-greek"))
(add-to-list 'org-structure-template-alist (cons "el" "src emacs-lisp"))
;; (add-to-list 'org-modules 'ol-gnus)

;;; Keys

(define-key global-map (vector ?\H-a) #'org-agenda)
(define-key global-map (vector 3 97) #'org-agenda)
(define-key global-map (vector 3 99) #'org-capture)
(define-key global-map (vector 3 ?l) #'org-store-link)

(define-key org-mode-map (vector ?\C-') nil)
(define-key org-mode-map (vector ?\C-,) nil)
(define-key org-mode-map (vector 'C-return) nil)
(define-key org-mode-map (vector 'C-S-return) nil)
(define-key org-mode-map (vector 3 ?\S-l) #'org-toggle-link-display)
(define-key org-mode-map (vector 3 ?\C-\S-l) #'org-insert-last-stored-link)

(declare-function 'durand-pulse-pulse-line "~/.emacs.d/basic.el")

(add-hook 'org-follow-link-hook #'durand-pulse-recenter-top)

;;; Some variables

(setq org-todo-keywords
      '((sequence "TODO(t)" "START(s)" "WORKING(w)" "HARD-WORKING(h)" "ALMOST(a)" "|" "DONE(d)")
        (sequence "TO-THINK(c)" "PENDING(p)" "HARD(r)" "IMPOSSIBLE(i)" "|" "SOLVED(v)"))
      org-tags-column -110
      org-special-ctrl-a/e nil
      org-highlight-latex-and-related '(native latex script entities)
      org-agenda-files (mapcar (lambda (fn) (expand-file-name fn org-directory))
			       (list "notes.org"
				     "agenda.org"
				     "aujourdhui.org"
				     "math_article_links.org"))
      org-log-into-drawer t
      org-highest-priority ?A
      org-lowest-priority ?E
      org-default-priority ?B
      org-pretty-entities t
      org-link-file-path-type 'noabbrev

      )

;;; open link functions

(dolist (scheme '("ftp" "http" "https" "mailto" "news"))
  (org-link-set-parameters scheme
                           :follow
                           (lambda (url &optional arg)
			     (browse-url (concat scheme ":" url) arg))))

(use-package "tablist" 'tablist)
(setq pdf-info-epdfinfo-program "/Users/durand/elisp_packages/pdf-tools/epdfinfo" )
(load-config "org-pdftools.el")
(set 'org-pdftools-link-prefix "pdfview")
(org-pdftools-setup-link)

;;; Archive advice

;;;###autoload
(defun durand-archive-save-and-kill (old-fun &optional find-done)
  "Save and kill the buffer after archiving."
  (let* ((location (org-archive--compute-location
                    (or (org-entry-get nil "ARCHIVE" 'inherit)
                        org-archive-location)))
         (archive-buffer-name (file-name-nondirectory (car location)))
         (opened (get-buffer archive-buffer-name)))
    (funcall old-fun find-done)
    (unless opened
      (when (get-buffer archive-buffer-name)
        (with-current-buffer archive-buffer-name
          (ignore-errors (save-buffer 0)))
        (kill-buffer archive-buffer-name)))))

(advice-add 'org-archive-subtree :around 'durand-archive-save-and-kill)

;;; Archiving

;;;###autoload
(defun durand-org-archive-file-name (file-name)
  "Produce an archive file name.
The rule is as follows:
example.org
example.org_archive
example(1).org_archive
example(2).org_archive
etc."
  (cond
   ((not (or (string-match "org$" file-name)
             (string-match "org_archive$" file-name)))
    (user-error "Not an org file.")))
  (cond
   ((string-match "org$" file-name)
    (replace-match "org_archive" nil nil file-name))
   ((string-match "\\((\\([[:digit:]]+\\))\\).org_archive$" file-name)
    (replace-match
     (format "(%d)"
             (1+ (string-to-number
                  (match-string-no-properties 2 file-name))))
     nil nil file-name 1))
   (t
    (replace-regexp-in-string ".org_archive$" "(1).org_archive" file-name))))

;;;###autoload
(defun durand-org-goto-archive ()
  "Go to the archive file of the current org file, if any.
It will cycle through all archive files of the file.
The rule is as follows:
example.org
example.org_archive
example(1).org_archive
example(2).org_archive
etc."
  (interactive)
  (unless (derived-mode-p 'org-mode)
    (user-error "Not in an org file."))
  (let* ((current-name (buffer-file-name (current-buffer)))
         (base-name (cond
                     ((string-match "org_archive$" current-name)
                      (replace-match "org" nil nil current-name))
                     (t current-name)))
         (base-name (cond
                     ((string-match "\\(([[:digit:]])\\).org$" base-name)
                      (replace-match "" nil nil base-name 1))
                     (t base-name)))
         (next-name (durand-org-archive-file-name current-name))
         (next-name (cond
                     ((file-exists-p next-name) next-name)
                     (t base-name))))
    (find-file next-name)))

;;; Set tags

;; NOTE: Modified by Durand to use `completing-read-multiple' instead of
;; `completing-read'.
;;;###autoload
(defun durand-org-set-tags-command (&optional arg)
  "Set the tags for the current visible entry.

When called with `\\[universal-argument]' prefix argument ARG, \
realign all tags
in the current buffer.

When called with `\\[universal-argument] \\[universal-argument]' prefix argument, \
unconditionally do not
offer the fast tag selection interface.

If a region is active, set tags in the region according to the
setting of `org-loop-over-headlines-in-active-region'.

This function is for interactive use only;
in Lisp code use `org-set-tags' instead."
  (interactive "P")
  (let ((org-use-fast-tag-selection
         (unless (equal '(16) arg) org-use-fast-tag-selection)))
    (cond
     ((equal '(4) arg) (org-align-tags t))
     ((and (org-region-active-p) org-loop-over-headlines-in-active-region)
      (let (org-loop-over-headlines-in-active-region) ;  hint: infinite recursion.
        (org-map-entries
         #'org-set-tags-command
         nil
         (if (eq org-loop-over-headlines-in-active-region 'start-level)
             'region-start-level
           'region)
         (lambda () (when (org-invisible-p) (org-end-of-subtree nil t))))))
     (t
      (save-excursion
        (org-back-to-heading)
        (let* ((all-tags (org-get-tags))
               (table (setq org-last-tags-completion-table
                            (org--tag-add-to-alist
                             (and org-complete-tags-always-offer-all-agenda-tags
                                  (org-global-tags-completion-table
                                   (org-agenda-files)))
                             (or org-current-tag-alist (org-get-buffer-tags)))))
               (current-tags
                (cl-remove-if (lambda (tag) (get-text-property 0 'inherited tag))
                              all-tags))
               (inherited-tags
                (cl-remove-if-not (lambda (tag) (get-text-property 0 'inherited tag))
                                  all-tags))
               (tags
                (replace-regexp-in-string
                 ;; Ignore all forbidden characters in tags.
                 "[^[:alnum:]_@#%]+" ":"
                 (if (or (eq t org-use-fast-tag-selection)
                         (and org-use-fast-tag-selection
                              (delq nil (mapcar #'cdr table))))
                     (org-fast-tag-selection
                      current-tags
                      inherited-tags
                      table
                      (and org-fast-tag-selection-include-todo org-todo-key-alist))
                   (let ((org-add-colon-after-tag-completion (< 1 (length table))))
                     ;; I change this part
                     (org-trim
                      (org-make-tag-string
                       (completing-read-multiple
                        "Tags: "
                        #'org-tags-completion-function
                        nil nil (replace-regexp-in-string
                                 ":" ","
                                 (org-make-tag-string current-tags))
                        'org-tags-history))))))))
          (org-set-tags tags)))))
    ;; `save-excursion' may not replace the point at the right
    ;; position.
    (when (and (save-excursion (skip-chars-backward "*") (bolp))
               (looking-at-p " "))
      (forward-char))))

(advice-add 'org-set-tags-command :override 'durand-org-set-tags-command)

;;; Accounts

;;;###autoload
(defvar durand-org-capture-account-which-list
  '("breakfast" "brunch" "brunverage" "lunch" "dinner" "beverage" "snack" "fruit")
  "The list of purposes of accounts in the capture-template for accounting.")

;;;###autoload
(defun durand-org-capture-account-template ()
  "Org capture template for account."
  (let* ((shop-and-items (durand-org-complete-capture-account))
         (which (completing-read
                 "For what? "
                 durand-org-capture-account-which-list))
         (cost (number-to-string
                (read-number "Cost: " 0)))
         (from (completing-read "From: " '("Cash" "etique")))
         (active-time (format-time-string
                       (cdr org-time-stamp-formats)))
         (inactive-time
          (let ((temp active-time))
            (while (string-match "<\\|>" temp)
              (setf temp
                    (replace-match
                     (cond
                      ((string= (match-string-no-properties 0 temp) "<") "[")
                      ((string= (match-string-no-properties 0 temp) ">") "]"))
                     nil nil temp)))
            temp)))
    (format "%s\n  :PROPERTIES:\n  :cost: %s\n  :FROM: %s\n  :RECORD_TIME: %s\n  :END: \n  %s%%?"
            which cost from inactive-time shop-and-items)))

(require 'org-protocol)

;;; Capture templates

(setq org-capture-templates
      '(("d" "Record Diaries" entry
         (file+olp+datetree "~/org/diary.org")
         "* %?\n  :PROPERTIES:\n  :RECORD_TIME: %U\n  :END:\n\n"
         :jump-to-captured t)
        ("l" "Store links" entry
         (file "/Users/durand/org/math_article_links.org")
         "* TO-THINK %? %(org-insert-time-stamp (org-read-date nil t \"+0d\") nil t)\n%a\n" :kill-buffer t)
        ("L" "for storing webpages" entry
         #'org-determine-link-file
         "* PENDING %(org-filter-title) %(org-determine-tag)\n  :PROPERTIES:\n  :RECORD_TIME: %U\n  :END:\n\n  %(org-filtered-link)\n  %i\n  %?"
         :empty-lines 1
         :kill-buffer t
         :immediate-finish t)
        ("t" "TODO" entry
         (file "~/org/aujourdhui.org")
         "* TODO %? %^{Date to do:}t\n  :PROPERTIES:\n  :RECORD_TIME: %U\n  :END:\n\n"
         :kill-buffer t)
        ;; ("b" "Blog posts" entry
        ;;  (file+headline "~/org/notes.org" "Blog posts")
        ;;  "* %? %(org-insert-time-stamp (org-read-date nil t \"+0d\"))\n%i\n")
        ;; ("a" "Abstractions" entry
        ;;  (file+headline "~/org/wiki.org" "Abstractions")
        ;;  "* ABSTRACT %?\n  :PROPERTIES:\n  :RECORD_TIME: %U\n  :END:\n\n")
        ("A" "Agenda" entry
         (file+headline "~/org/agenda.org" "Agenda")
         "* TODO %?\n  :PROPERTIES:\n  :RECORD_TIME: %U\n  :DURATION: %^{Date: }t\n  :END:\n\n")
        ;; ("y" "YiFu" entry
        ;;  (file+headline "~/org/wiki.org" "Yi Fu Tips")
        ;;  "* MEMO %^{word}\n  :PROPERTIES:\n  :STORY: %\\2\n  :MEANING: %\\3\n  :END:\n** Yi Fu story\n   %^{story}\n** Meaning\n   %^{meaning}"
        ;;  :kill-buffer t
        ;;  :immediate-finish t)
        ("c" "Chansons" entry
         (file+headline "~/org/wiki.org" "Liste de Chansons")
         "* MEMO %^{title}\n  :PROPERTIES:\n  :RECORD_TIME: %U\n  :LINK: [[%^{link}][%^{description}]]\n  :END:\n  %?"
         :jump-to-captured t)
        ;; ("f" "français" entry
        ;;  (file+headline "~/org/français/français.org" "Liste de mots français")
        ;;  "* MEMO %^{mot} :drill:\n  :PROPERTIES:\n  :DRILL_CARD_TYPE: français\n  :RECORD_TIME: %U\n  :MEANING: %^{ce qu'il veut dire}\n  :END:\n\n  MEANING: %\\2\n%?"
        ;;  :jump-to-captured t)
        ("g" "GNUS" entry
         (file "~/org/notes.org")
         "* TO-THINK %:subject\n  :PROPERTIES:\n  :RECORD_TIME: %U\n  :END:\n  %:from\n  %:to\n  %a\n  %?"
         :empty-lines 1
         :kill-buffer t)))

(setq org-capture-templates-contexts
      '(("g" ((in-mode . "gnus-summary-mode")
              (in-mode . "gnus-article-mode")))))

;;; agenda custom commands

(setq org-agenda-custom-commands
        '(("o" "Custom"
           ((agenda ""
                    (;; (org-super-agenda-groups
                     ;;  '((:name "Progress today"
                     ;;     :log t
                     ;;     :order -1)
                     ;;    (:name "Morning Tasks"
                     ;;     :log t
                     ;;     :tag "morning"
                     ;;     :order 1)
                     ;;    (:name "Afternoon Taks"
                     ;;     :log t
                     ;;     :tag "afternoon"
                     ;;     :order 2)
                     ;;    (:name "Night Taks"
                     ;;     :log t
                     ;;     :tag "night"
                     ;;     :order 3)
                     ;;    (:name "Deadlines" :deadline t)
                     ;;    (:name "Health"
                     ;;     :tag "santé"
                     ;;     :log t
                     ;;     :order 5)
                     ;;    (:name "MATH"
                     ;;     :tag "math"
                     ;;     :order -1)
                     ;;    (:name "Très Important"
                     ;;     :priority "A"
                     ;;     :order -1)
                     ;;    (:name "Scheduled"
                     ;;     :and (:scheduled t :not (:priority "A"))
                     ;;     :order 5
                     ;;     :log t)))
                     (org-agenda-span 'day)
                     (org-agenda-sorting-strategy '(priority-down time-up))))
            ;; NOTE: A reading plan
            (tags "a_voir+matin|a_voir+après_midi|a_voir+nuit"
                  ((org-agenda-files '("~/org/notes.org"
                                       "~/org/math_article_links.org"))
                   (org-agenda-overriding-header "À Lire")
                   ;; (org-super-agenda-groups
                   ;;  '((:name "Le Matin" :tag "matin")
                   ;;    (:name "L'après-midi" :tag "après_midi")
                   ;;    (:name "La Nuit" :tag "nuit")))
                   ))
            (todo "TO-THINK"
                  (;; (org-super-agenda-groups
                   ;;  '((:name "À Voir" :tag "a_voir")
                   ;;    (:name "Mathématiques" :tag "math")
                   ;;    (:name "TeX" :tag "tex")
                   ;;    (:name "Question" :tag "question")))
                   (org-agenda-overriding-header "TO-THINK"))))
           ((org-agenda-block-separator nil)))
          ;; ("n" "test"
          ;;  ((durand-agenda-command-test)))
          ;; ("m" "sections with time"
          ;;  ((durand-agenda-command-sections-time)))
          ))

;;; elisp in link confirmation

(setq org-link-elisp-confirm-function 'y-or-n-p)

;;; agenda window setup

(setq org-agenda-window-setup 'other-tab)
;; The following will be ignored since the above is 'other-tab.
(setq org-agenda-restore-windows-after-quit t)

;;; novel addresses
;;;###autoload
(defvar durand-novel-addresses-regexp '("uukanshu"
                                        "ptwxz"
                                        "piaotian"
                                        "101novel"
                                        "booktxt")
  "Regexp for matching a novel website.")

;;;###autoload
(defun org-determine-link-file ()
  "Go to the file to capture to based upon the URL"
  (let* ((link (plist-get org-store-link-plist :link))
         (file-name
          (cond
           ((string-match-p "https?://www.youtube.com" link)
            "youtube_links.org")
           ((or
             (string-match-p "https?://math.stackexchange.com" link)
             (string-match-p "https?://mathoverflow.net/" link))
            "math_article_links.org")
           ((let ((temp durand-novel-addresses-regexp)
                  result)
              (while (and (consp temp) (not result))
                (cond
                 ((string-match-p (car temp) link)
                  (setq result t)))
                (setq temp (cdr temp)))
              result)
            "notes.org")
           ((string-match-p "https?://stacks.math.columbia.edu/" link)
            "math_article_links.org")
           (t
            "notes.org"))))
    (find-file (expand-file-name file-name org-directory))
    (goto-char (point-max))))

;;; filter title in the link
;;;###autoload
(defun org-filtered-link ()
  "Filter out some unnecessary parts in the link description"
  (save-match-data
    (let* ((link (plist-get org-store-link-plist :link))
           (title (plist-get org-store-link-plist :description))
           (filtered (cond ((string-match " - Mathematics Stack Exchange" title)
                            (replace-match "" nil nil title))
                           ((string-match " - YouTube" title)
                            (replace-match "" nil nil title))
                           ((string-match "\\(.*?\\)最新章节列表,\\1无弹窗_UU看书" title)
                            (replace-match "\\1" nil nil title))
                           (t
                            title))))
      (org-link-make-string link filtered))))

;;; Determine tag based upon the URL
;;;###autoload
(defun org-determine-tag ()
  "Determine tag based upon the URL"
  (let ((link (plist-get org-store-link-plist :link)))
    (cond
     ((string-match-p "https?://www.youtube.com" link)
      ":youtube:")
     ((or
       (string-match-p "https?://math.stackexchange.com" link)
       (string-match-p "https?://mathoverflow.net/" link))
      ":stack:web_link:")
     ((let ((temp durand-novel-addresses-regexp)
            result)
        (while (and (consp temp) (not result))
          (cond
           ((string-match-p (car temp) link)
            (setq result t)))
          (setq temp (cdr temp)))
        result)
      ":roman:")
     ((string-match-p "https?://stacks.math.columbia.edu/" link)
      ":web_link:stack:")
     (t
      ":web_link:"))))

;;;###autoload
(defun org-update-novels (&optional desc)
  "Update the html link to a novel, or to a web_link.
If DESC is non-`nil', then it is the description of the new link."
  (interactive)
;; HACK: Refocus the selected frame.
;; I was doing this in the applescript. But for some reason it is messed up. So
;; I let Emacs gain focus by itself now.
  (select-frame-set-input-focus (selected-frame))
  (let* ((tags (completing-read "tag: " '("roman-ARCHIVE"
                                          "web_link-ARCHIVE")
                                nil t))
         (roman-p (string-match "roman" tags))
         (files '("/Users/durand/org/notes.org" "/Users/durand/org/math_article_links.org"))
         (prompt (if roman-p
                     "Chois un roman à mettre à jour: "
                   "Chois un web lien à mettre à jour: "))
         cands)
    (setf cands
          (cl-loop for file in files
                   append (with-current-file file nil
                            (org-map-entries
                             (lambda ()
                               (let ((orig (durand-org-link-info t)))
                                 (list (car orig) (cdr orig) file)))
                             tags))))
    (unless roman-p (setf cands (nreverse cands)))
    (let* ((choix (completing-read prompt cands nil t))
           (item (cl-assoc choix cands :test #'string=))
           (lien (read-string "Le lien: " (current-kill 0 t))))
      (with-current-file (caddr item) nil
        (goto-char (cadr item))
        (org-update-link lien nil nil desc)))))

;;; filter out the title

;;;###autoload
(defun org-filter-title ()
  "Filter out some unnecessary parts of the link title"
  (let ((title (plist-get org-store-link-plist :description)))
    (cond
     ((string-match " - Mathematics Stack Exchange" title)
      (replace-match "" nil nil title))
     ((string-match " - YouTube" title)
      (replace-match "" nil nil title))
     ((string-match "\\(.*?\\)最新章节列表,\\1无弹窗_UU看书" title)
      (replace-match "\\1" nil nil title))
     (t
      title))))

;;; publishing settings

;;;; Custom preamble for the sidebar

(defvar durand-org-publish-sidebar nil
  "The sidebar that provides the navigation of the website.")

(setq durand-org-publish-sidebar
      "<div class=\"sidebar\">\n\
<a href=\"math-sitemap.html\"> Math </a>\n\
<a href=\"code-sitemap.html\"> Code </a>\n\
<a  href=\"life-sitemap.html\"> Life </a>\n\
<a href=\"index.html\"> Home </a>\n\
<a href=\"feeds.html\"> Feeds (Atom) </a></div>")

;; REVIEW: This might be unnecessary.
(defun durand-org-publish-insert-sidebar (_arg)
  "Return the sidebar."
  durand-org-publish-sidebar)

;;;;; Add a custom head

(defvar durand-org-publish-css-file nil
  "A custom css-file for publishing.")

(setq durand-org-publish-css-file
      "<link rel=\"stylesheet\" type=\"text/css\" \
href=\"website.css\"/>")

(defvar durand-org-publish-favicon nil
  "A custom favicon for publishing.")

(setq durand-org-publish-favicon
      "<link rel='shortcut icon' \
href='https://jsdurand.xyz/favicon.ico'/>")

;;;; Don't include JavaScript in the HTML

(setq org-html-head-include-scripts nil)

;;;; Projects settings

(setq org-publish-project-alist
      (list
       (list
        "website"
        :components (list "math" "code" "life" "main"))
       (list
        "code"
        :base-directory (directory-file-name
                         (expand-file-name
                          "code" (expand-file-name
                                  "blog" org-directory)))
        :base-extension "org"
        :publishing-directory (directory-file-name
                               (expand-file-name
                                "public" org-directory))
        :publishing-function #'org-html-publish-to-html
        :section-numbers nil
        :with-toc nil
        :with-email t
        :with-creator t
        :auto-sitemap t
        :recursive t
        :sitemap-function #'durand-org-publish-sitemap
        :sitemap-format-entry #'durand-org-publish-sitemap-format
        :sitemap-date-format "Published: %F %a %R"
        :sitemap-filename "code-sitemap.org"
        :sitemap-title "About coding"
        :sitemap-sort-files 'anti-chronologically
        :html-head (concat durand-org-publish-css-file
                           "\n"
                           durand-org-publish-favicon)
        :html-link-home ""
        :html-link-up ""
        :html-home/up-format ""
        :html-preamble #'durand-org-publish-insert-sidebar)
       (list
        "math"
        :base-directory (directory-file-name
                         (expand-file-name
                          "math" (expand-file-name
                                  "blog" org-directory)))
        :base-extension "org"
        :publishing-directory (directory-file-name
                               (expand-file-name
                                "public" org-directory))
        :publishing-function #'org-html-publish-to-html
        :section-numbers nil
        :with-toc nil
        :with-email t
        :with-creator t
        :auto-sitemap t
        :recursive t
        :sitemap-function #'durand-org-publish-sitemap
        :sitemap-format-entry #'durand-org-publish-sitemap-format
        :sitemap-date-format "Published: %F %a %R"
        :sitemap-filename "math-sitemap.org"
        :sitemap-title "Mathematics"
        :sitemap-sort-files 'anti-chronologically
        :html-head (concat durand-org-publish-css-file
                           "\n"
                           durand-org-publish-favicon)
        :html-link-home ""
        :html-link-up ""
        :html-home/up-format ""
        :html-preamble #'durand-org-publish-insert-sidebar)
       (list
        "life"
        :base-directory (directory-file-name
                         (expand-file-name
                          "life" (expand-file-name
                                  "blog" org-directory)))
        :base-extension "org"
        :publishing-directory (directory-file-name
                               (expand-file-name
                                "public" org-directory))
        :publishing-function #'org-html-publish-to-html
        :section-numbers nil
        :with-toc nil
        :with-email t
        :with-creator t
        :auto-sitemap t
        :recursive t
        :sitemap-function #'durand-org-publish-sitemap
        :sitemap-format-entry #'durand-org-publish-sitemap-format
        :sitemap-date-format "Published: %F %a %R"
        :sitemap-filename "life-sitemap.org"
        :sitemap-title "My life"
        :sitemap-sort-files 'anti-chronologically
        :html-head (concat durand-org-publish-css-file
                           "\n"
                           durand-org-publish-favicon)
        :html-link-home ""
        :html-link-up ""
        :html-home/up-format ""
        :html-preamble #'durand-org-publish-insert-sidebar)
       (list
        "main"
        :base-directory (directory-file-name
                         (expand-file-name
                          "blog" org-directory))
        :base-extension "org"
        :publishing-directory (directory-file-name
                               (expand-file-name
                                "public" org-directory))
        :publishing-function #'org-html-publish-to-html
        :section-numbers nil
        :with-toc nil
        :with-email t
        :with-creator t
        :auto-sitemap nil
        :recursive nil
        :html-head (concat durand-org-publish-css-file
                           "\n"
                           durand-org-publish-favicon)
        :html-link-home ""
        :html-link-up ""
        :html-home/up-format ""
        :html-preamble #'durand-org-publish-insert-sidebar)))

;;;; Sitemap function

;;;;; A hack to insert some string in the sitemap file.

(defvar durand-sitemap-custom-string-alist nil
  "An association list that relates the title of the sitemap and the string to insert.")

(setq durand-sitemap-custom-string-alist
      (list
       (list "About coding"
             "This is my coding blog.  It contains my coding experiments, or \
one might think of them as development diaries."
             "code-atom.xml")
       (list "My life"
             "This is my casual blog.  It contains articles about my plain \
life."
             "life-atom.xml")
       (list "Mathematics"
             "My Mathematics-related articles are put here."
             "math-atom.xml")))

;;;;; Custom sitemap function

(defun durand-org-publish-sitemap (title rep)
  "Return the sitemap as a string.
TITLE is the title of the sitemap.

REP is a representation of the files and directories in the
project.  Use such functions as `org-list-to-org' or
`org-list-to-subtree' to transform it."
  (format "#+TITLE: %s\n#+AUTHOR: JSDurand\n%s#+DATE: <%s>\n\n%s\n\n\
#+ATTR_HTML: :border nil :rules nil :frame nil\n\
%s\n\n\
[[https://jsdurand.xyz/%s][Web feed]]"
          title
          "#+HTML_LINK_UP: index.html"
          (format-time-string "%F %a %R")
          (cadr (assoc title durand-sitemap-custom-string-alist #'string=))
          ;; generate a table
          (org-list-to-generic
           rep
           '(:ustart "|---|"
             :uend "|---|"
             :isep "|---|"))
          (caddr (assoc title durand-sitemap-custom-string-alist #'string=))))

;;;;; Custom sitemap format

;; NOTE: I use a table to style the entries.

;; NOTE: This stores the date in an ugly long format.  But worry not:
;; it will be replaced by a clean form in the post-processing phase.
;; The long form is inserted here so that we can sort the entries
;; precisely.

(defun durand-org-publish-sitemap-format (entry _style project)
  "Format the entry for the sitemap as a table with a date.
ENTRY is the entry file name to format.

STYLE is either 'list or 'tree, which is ignored by us.

PROJECT is the current project."
  (format "| %s | [[file:%s][%s]] |"
          (format-time-string
           "%FT%T%z"
           (org-publish-find-date entry project)
           (current-time-zone))
          entry
          (org-publish-find-title entry project)))

;;;; Post-processing

;; I post-process the sitemaps in order to generate a section
;; of "latest updates" on the index page.

;;;;; fix: plist-get not working

;; For some reason the built-in `plist-get' does not work...
(defun durand-org-publish-plist-get (prop plist)
  (let (res)
    (while (consp plist)
      (cond
       ((eq (car plist) prop)
        (setq res (cadr plist))
        (setq plist nil))
       ((setq plist (cddr plist)))))
    res))

;;;;; Helper for converting the format from `parse-time-string'

(defun durand-org-publish-convert-time (spec)
  "Convert SPEC to a valid time value.
SPEC should be the result of `parse-time-string'.

It is assumed that the year, the month, and the day components
are present."
  (let ((sec (car spec))
        (minute (cadr spec))
        (hour (caddr spec)))
    (encode-time
     (append
      (list
       (or sec 0)
       (or minute 0)
       (or hour 0))
      (cdddr spec)))))

;;;;; Post process to generate the index page

(defvar durand-org-index-entries-max-num 10
  "The maximal number of entries to show on the index page.")

(autoload #'durand-take (locate-user-emacs-file "common.el"))

(defun durand-org-post-process (project)
  "Generate a proper index page and Atom feeds.
Also shorten the date strings in the sitemap files, and store the
completion information in an attribute.

The feeds are generated by the function `durand-org-generate-atom-feed'."
  (let* ((project-plist (cdr (assoc project org-publish-project-alist #'string=)))
         (components (durand-org-publish-plist-get
                      :components project-plist))
         (sitemap-file (durand-org-publish-plist-get
                        :sitemap-filename project-plist))
         ;; I cheat here
         (publishing-dir (expand-file-name "~/org/public/"))
         (publish-sitemap-file (cond
                                (sitemap-file
                                 (replace-regexp-in-string
                                  "org$" "html"
                                  (expand-file-name sitemap-file publishing-dir)))))
         (index-file (expand-file-name "index.html" publishing-dir))
         contents)
    (cond
     ;; depth-first recursion
     (components
      (setq contents (apply #'append
                            (delete nil (mapcar #'durand-org-post-process components))))
      ;; We only want some items
      (setq contents
            (durand-take
             durand-org-index-entries-max-num
             (sort contents
                   (lambda (x y)
                     (time-less-p
                      (car y) (car x))))))
      ;; If contents is non-nil, we need to process the info in the
      ;; index page.
      (cond
       (contents
        (with-temp-buffer
          (insert-file-contents index-file)
          (goto-char (point-min))
          (search-forward "Latest updates")
          (goto-char (line-end-position))
          (while (search-forward "<table" nil t)
            ;; delete existing tables
            (delete-region
             (match-beginning 0)
             (progn (search-forward "</table>")
                    (match-end 0))))
          (insert "\n")
          (insert "<table cellspacing=\"0\" cellpadding=\"6\">


<colgroup>
<col  class=\"org-right\" />

<col  class=\"org-left\" />
</colgroup>\n\n<tbody>\n")
          (mapc
           (lambda (entry)
             (insert "<tr>")
             (insert "<td class=\"org-right\">")
             (insert (format-time-string "%F" (car entry)))
             (insert "</td>\n")
             (insert "<td class=\"org-left\">")
             (insert (cdr entry))
             (insert "</td>\n</tr>\n"))
           contents)
          (insert "</tbody>\n</table>")
          (write-region nil nil index-file)))))
     ((and publish-sitemap-file
           (stringp publish-sitemap-file)
           (file-exists-p publish-sitemap-file))
      (with-temp-buffer
        (insert-file-contents publish-sitemap-file)
        (goto-char (point-min))
        (search-forward "</colgroup>" nil t)
        (let ((regexp (rx-to-string
                       '(seq
                         "<t" (any "hd")
                         " "
                         (one-or-more (not (or ">")))
                         ">")
                       t))
              pos pos-2 temp temp-time)
          (while (re-search-forward regexp nil t)
            (setq pos (point))
            ;; replace the first org-left by org-right
            (save-excursion
              (goto-char (match-beginning 0))
              (setq pos-2 (match-end 0))
              (save-match-data
                (cond
                 ((re-search-forward "left" pos-2 t)
                  (replace-match "right")
                  ;; fix pos
                  (setq pos (1+ pos))))))
            (search-forward "</t")
            (setq pos-2 (match-beginning 0))
            (forward-line 1)
            (cond
             ((re-search-forward 
               (rx-to-string
                '(seq
                  (= 4 (any digit)) "-"
                  (= 2 (any digit)) "-"
                  (= 2 (any digit)) "T")
                t)
               (line-end-position) t)
              (setq temp-time
                    (durand-org-publish-convert-time
                     (parse-time-string
                      (buffer-substring-no-properties
                       (match-beginning 0)
                       (line-end-position))))))
             (t
              (setq
               temp-time
               (durand-org-publish-convert-time
                (parse-time-string
                 (buffer-substring-no-properties
                  pos pos-2))))
              (save-excursion
                (goto-char pos)
                (delete-region pos pos-2)
                (insert (format-time-string "%F" temp-time)))
              (insert
               "<!--"
               (format-time-string
                "%FT%T%z\n" temp-time (current-time-zone))
               "-->\n")
              (write-region nil nil publish-sitemap-file)))
            (setq
             temp
             (cons
              (cons
               temp-time
               (progn
                 (re-search-forward regexp)
                 (setq pos (point))
                 (search-forward "</t")
                 (buffer-substring-no-properties
                  pos (match-beginning 0))))
              temp)))
          (durand-org-generate-atom-feed
           project
           (expand-file-name (concat project "-atom.xml")
                             publishing-dir)
           (mapcar
            (lambda (cell)
              (let* ((orig-string (cdr cell))
                     (temp 0)
                     (title
                      (progn
                        (string-match ">" orig-string)
                        (setq temp (match-end 0))
                        (substring
                         orig-string
                         temp
                         (progn
                           (string-match "</a>" orig-string temp)
                           (match-beginning 0)))))
                     (file-name
                      (progn
                        (string-match "href=\"" orig-string)
                        (setq temp (match-end 0))
                        (substring
                         orig-string
                         temp
                         (progn
                           (string-match "\">" orig-string temp)
                           (match-beginning 0)))))
                     (content
                      (with-temp-buffer
                        (insert-file-contents
                         (expand-file-name file-name publishing-dir))
                        (goto-char (point-min))
                        (search-forward "<div id=\"content\">" nil t)
                        (search-forward "<p>" nil t)
                        (buffer-substring-no-properties
                         (1+ (point))
                         (progn
                           (search-forward "</p>" nil t)
                           (match-beginning 0)))))
                     ;; escape html
                     (content
                      (replace-regexp-in-string
                       ">" "&gt;"
                       (replace-regexp-in-string
                        "<" "&lt;"
                        (replace-regexp-in-string
                         "&" "&amp;" content)))))
                (list
                 title
                 (durand-org-atom-format-time
                  (file-attribute-modification-time
                   (file-attributes
                    (expand-file-name file-name publishing-dir))))
                 (concat "https://jsdurand.xyz/" file-name)
                 (concat "https://jsdurand.xyz/" file-name)
                 (durand-org-atom-format-time (car cell))
                 content)))
            (reverse temp)))
          (reverse temp)))))))

;;;;; add date/time info

;; I want to show the date of the article below the title, so that it
;; is clearer when the article is written.  The default display at the
;; bottom of the page is too hidden.

(defun durand-org-publish-html-advice (html-file-name)
  "Advice `org-html-publish-html' to add a date/time info below the \
title."
  (with-temp-buffer
    (insert-file-contents html-file-name)
    (goto-char (point-min))
    (cond
     ((search-forward "h1 class=\"title\"" nil t)
      ;; if it does not have a title, we do not add a time info.
      (search-forward "</h1>" nil)
      ;; if it already has a time info, don't generate again
      (cond ((save-excursion
               (forward-char 1)
               (looking-at-p "<time datetime=")))
            (t
             (let* ((date (let (temp)
                            (save-excursion
                              (goto-char (point-max))
                              (cond
                               ((search-backward "<p class=\"date\">Date: " nil t)
                                (setq temp (match-end 0))
                                (buffer-substring-no-properties
                                 temp (progn
                                        (search-forward "</p>")
                                        (match-beginning 0))))))))
                    (date-time (and date
                                    (encode-time
                                     (append
                                      (durand-take 8 (parse-time-string date))
                                      (list 28800))))))
               (cond
                (date
                 (insert
                  (format
                   "\n<time datetime=\"%s\">%s</time>\n"
                   (format-time-string "%FT%T%z" date-time)
                   (format-time-string "%F" date-time)))
                 (write-region nil nil html-file-name))))))))))

(advice-add #'org-html-publish-to-html :filter-return #'durand-org-publish-html-advice)

;;;; Atom feed

;;;;; Fixed pre-amble, template, and post-amble.

(defvar durand-org-atom-titles-alist nil
  "An assocuation list of Atom feed titles with the project name.")

(setq durand-org-atom-titles-alist
      (list
       (list "code" "JSDurand's codes" "https://jsdurand.xyz/code-atom.xml")
       (list "math" "Math articles of JSDurand"
             "https://jsdurand.xyz/math-atom.xml")
       (list "life" "JSDurand's life"
             "https://jsdurand.xyz/life-atom.xml")))

(defvar durand-org-atom-preamble nil
  "The preamble of an Atom feed.")

(setq durand-org-atom-preamble
      "<?xml version=\"1.0\" encoding=\"utf-8\" ?>
<feed xmlns=\"http://www.w3.org/2005/Atom\">
<id>https://jsdurand.xyz/atom.xml</id>
<title>%s</title>
<author>
<name>JSDurand</name>
<uri> https://jsdurand.xyz </uri>
<email>mmemmew@gmail.com</email>
</author>
<link rel=\"self\" type=\"applicatoin/atom+xml\" href=\"%s\"/>
<rights>Copyright (c) 2021, JSDurand</rights>
<updated>%s</updated>
<generator uri=\"https://www.gnu.org/software/emacs/\" version=\"28.0.50\">\
Emacs</generator>\n")

(defvar durand-org-atom-entry-template nil
  "The template for an Atom entry.
It HAS to be formatted with 6 arguments in the following order:

TITLE: the title.  Note this does not have a subtitle.

UPDATED-TIME: the newest updated time.

ID: I think I will use the URL as the ID directly.

LINK: Link to this entry.

PUBLISHED-TIME: the time this is published.

CONTENT: a short content.
")

(setq durand-org-atom-entry-template
      "<entry>
<title type=\"text\">%s</title>
<updated>%s</updated>
<id>%s</id>
<link rel=\"self\" type=\"text/html\" href=\"%s\"/>
<published>%s</published>
<content type=\"html\">
%s
</content>
</entry>")

(defvar durand-org-atom-postamble nil
  "The post-amble of an Atom feed.")

(setq durand-org-atom-postamble
      "</feed>")

;;;;; Format time easily

(defun durand-org-atom-format-time (time)
  "Format TIME in an acceptable way."
  (concat
   (format-time-string
    "%FT%T" time)
   (format "%s%02d:%02d"
           (cond ((> (car (current-time-zone)) 0) "+")
                 ("-"))
           (/ (car (current-time-zone)) 3600)
           (% (car (current-time-zone)) 3600))))

;;;;; The Atom feeds are generated in this function.

(defun durand-org-generate-atom-feed (project file-name entries)
  "Generate an Atom feed for ENTRIES and save in FILE-NAME.
PROJECT is the name of the subproject.

ENTRIES is a list of entries.

An entry is a list of the form (TITLE UPTIME ID LINK PUBTIME CONTENT).
See the documentation string for `durand-org-atom-entry-template' for more."
  (with-temp-buffer
    (insert (apply #'format
                   durand-org-atom-preamble
                   (append
                    (cdr
                     (assoc project durand-org-atom-titles-alist
                            #'string=))
                    (list (durand-org-atom-format-time nil))))
            "\n")
    (mapc
     (lambda (entry)
       (insert (apply #'format durand-org-atom-entry-template
                      entry)
               "\n"))
     entries)
    (insert durand-org-atom-postamble)
    (write-region nil nil file-name)))