From ed5b0d0410085384651124b1438b6a70d29bbc92 Mon Sep 17 00:00:00 2001 From: Sacha Chua Date: Sat, 13 Nov 2021 00:21:33 -0500 Subject: Initial version --- emacsconf-update.el | 159 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 159 insertions(+) create mode 100644 emacsconf-update.el diff --git a/emacsconf-update.el b/emacsconf-update.el new file mode 100644 index 0000000..55c29c7 --- /dev/null +++ b/emacsconf-update.el @@ -0,0 +1,159 @@ +;;; emacsconf-update.el --- Update an Org file with the current schedule -*- lexical-binding: t; -*- + +;; Copyright (C) 2021 Sacha Chua + +;; Author: Sacha Chua +;; Keywords: convenience, calendar +;; Version: 0.1 +;; URL: https://github.com/emacsconf/emacsconf-el +;; +;; 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 . + +;;; Commentary: + +;; The following code should retrieve the conference schedule and update +;; a file that people use for notes. It should keep the notes people +;; already have, and just update the scheduled times or create new notes +;; as needed. If the calendar file has UID properties, it is used to +;; match headings. If not, headings are used. + +;; Make a file for your notes with Org, and then call +;; =M-x emacsconf-update-org-from-ical-url= . It should load the talks and +;; tentative schedules from the wiki. You can call it again and it should +;; update the titles and schedules while still keeping whatever notes +;; you've added. +;; +;; You may also like =M-x emacsconf-update-view-org-agenda=. +;; +;;; Code: + +(defgroup emacsconf-update nil + "Convenience functions for downloading the schedule and updating an Org file." + :group 'communication) + +(defcustom emacsconf-update-ical-url "https://emacsconf.org/current/emacsconf.ics" + "URL to get schedule updates from." + :type 'string + :group 'emacsconf-update) + +(defcustom emacsconf-update-create-entries t + "Non-nil means create missing entries." + :type '(choice (const t "Create missing entries") + (const nil "Don't create missing entries")) + :group 'emacsconf-update) + +(require 'icalendar) +(require 'ox-icalendar) + +(defun emacsconf-update-org-from-ical-url () + "Update current notes from iCalendar file at `emacsconf-update-ical-url'." + (interactive) + (emacsconf-update-org-from-ical-string + (with-temp-buffer + (url-insert-file-contents emacsconf-update-ical-url) + (buffer-string)))) + +(defun emacsconf-update-org-from-ical-file (filename) + "Prompt for FILENAME and update current notes from schedule." + (interactive "FFilename: ") + (emacsconf-update-org-from-ical-string (with-temp-buffer (insert-file-contents filename) (buffer-string)))) + +(defun emacsconf-ical-get-calendar-from-string (string) + "Read the calendar data from STRING." + (with-temp-buffer + (insert string) + (goto-char (point-min)) + (with-current-buffer (icalendar--get-unfolded-buffer (current-buffer)) + (goto-char (point-min)) + (when (re-search-forward "^BEGIN:VCALENDAR\\s-*$" nil t) + (beginning-of-line) + (icalendar--read-element nil nil))))) + +(defun emacsconf-update--get-time-from-event (event property zone-map) + "Return time of EVENT in PROPERTY with possible conversion from ZONE-MAP." + (let* ((dt (icalendar--get-event-property event property)) + (tz (icalendar--find-time-zone (icalendar--get-event-property-attributes event property) zone-map))) + (apply 'encode-time (icalendar--decode-isodatetime dt nil tz)))) + +(defun emacsconf-update--format-new-entry (event zone-map) + "Return string for new entry for EVENT." + (let* ((dtstart-time (emacsconf-update--get-time-from-event event 'DTSTART zone-map)) + (dtend-time (emacsconf-update--get-time-from-event event 'DTEND zone-map))) + (format "\n* %s\n:PROPERTIES:\n:UUID: %s\n:URL: %s\n:END:\nTentative schedule: %s--%s\n\n" + (icalendar--convert-string-for-import + (icalendar--get-event-property event 'SUMMARY)) + (icalendar--get-event-property event 'UID) + (icalendar--get-event-property event 'URL) + (org-format-time-string (cdr org-time-stamp-formats) dtstart-time) + (org-format-time-string (cdr org-time-stamp-formats) dtend-time)))) + +(defun emacsconf-update--update-entry (event zone-map) + "Update the current Org heading to match EVENT. +Use ZONE-MAP for timestamp decoding." + (let* ((dtstart-time (emacsconf-update--get-time-from-event e 'DTSTART zone-map)) + (dtend-time (emacsconf-update--get-time-from-event e 'DTEND zone-map))) + (org-back-to-heading) + (when (looking-at org-complex-heading-regexp) + (replace-match (icalendar--convert-string-for-import + (icalendar--get-event-property e 'SUMMARY)) + t t nil 4)) + (org-end-of-meta-data) + (when (re-search-forward (concat "Tentative schedule: " org-ts-regexp "--" org-ts-regexp " *\n") + nil + (save-excursion (org-end-of-subtree))) + (replace-match "")) + (insert "Tentative schedule: " + (org-format-time-string (cdr org-time-stamp-formats) + dtstart-time) + "--" + (org-format-time-string (cdr org-time-stamp-formats) + dtend-time) + "\n"))) + +(defun emacsconf-update-org-from-ical-string (string) + "Update Org headings in current file by using STRING." + (save-excursion + (let* ((ical (emacsconf-ical-get-calendar-from-string string)) + (zone-map (icalendar--convert-all-timezones ical))) + (mapc (lambda (e) + (let ((pos (org-find-property "UUID" (icalendar--get-event-property e 'UID)))) + (cond + (pos + (goto-char pos) + (emacsconf-update--update-entry e zone-map)) + (emacsconf-update-create-entries + (goto-char (point-max)) + (insert (emacsconf-update--format-new-entry e zone-map)))))) + (icalendar--all-events ical))))) + +;;;###autoload +(defun emacsconf-update-view-org-agenda () + "Display the agenda." + (interactive) + (let (times + min-time + max-time + (org-agenda-files (list (buffer-file-name)))) + ;; Collect all the times + (save-excursion + (goto-char (point-min)) + (while (re-search-forward org-ts-regexp nil t) + (setq times (cons (time-to-days (encode-time (org-parse-time-string (match-string 0)))) times))) + (setq min-time (apply 'min times) max-time (apply 'max times))) + (org-agenda-list nil + min-time + (1+ (- max-time min-time))))) + +(provide 'emacsconf-update) +;;; emacsconf-update.el ends here -- cgit v1.2.3