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;;; emacsconf-ical.el --- ical export -*- lexical-binding: t; -*-
;; Copyright (C) 2021 Sacha Chua
;; Author: Sacha Chua <sacha@sachachua.com>
;; Keywords: multimedia
;; 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:
(defun emacsconf-ical-send-via-email ()
(interactive)
(let ((ical-file (expand-file-name
(concat (org-entry-get (point) "SLUG") ".ics")
(expand-file-name "ics" (file-name-directory emacsconf-org-file))))
(ical-entry (emacsconf-ical-convert-entry-to-string (format-time-string "%Y%m%dT%H%M%SZ" nil t))))
(with-temp-file ical-file
(insert ical-entry))
(emacsconf-mail-speaker "Calendar entry")
(mml-attach-file ical-file)))
(defun emacsconf-ical-convert-entry-to-string (&optional updated)
(string-join
(list
"BEGIN:VCALENDAR"
"VERSION:2.0"
"PRODID:EmacsConf"
(concat "X-WR-CALNAME:EmacsConf " emacsconf-year)
"X-WR-CALNAME:EmacsConf"
"CALSCALE:GREGORIAN"
"METHOD:PUBLISH"
(emacsconf-ical-format-talk (emacsconf-get-talk-info-for-subtree) updated)
"END:VCALENDAR")
"\r\n"))
(defun emacsconf-ical-format-talk (o &optional updated)
(string-join
(delq
nil
(list
"BEGIN:VEVENT"
(string-trim (org-icalendar-fold-string
(org-icalendar-cleanup-string
(concat "SUMMARY:" (plist-get o :title)
(if (plist-get o :speakers)
(concat " - " (plist-get o :speakers))
"")))))
"ORGANIZER:EmacsConf"
(concat "LOCATION:" "https://emacsconf.org/")
;; (concat "UID:emacsconf-" emacsconf-year "-" (plist-get o :slug))
(concat "UID:" (plist-get o :uuid))
(concat "URL:" "https://emacsconf.org/" emacsconf-year "/talks/" (plist-get o :slug))
(concat "DTSTART:" (format-time-string "%Y%m%dT%H%M%SZ" (plist-get o :start-time) t))
(concat "DTEND:" (format-time-string "%Y%m%dT%H%M%SZ" (plist-get o :end-time) t))
(if updated (concat "DTSTAMP:" updated))
(if (plist-get o :speakers)
(mapconcat
(lambda (s)
(format "ATTENDEE;ROLE=REQ-PARTICIPANT;CUTYPE=INDIVIDUAL;CN=\"%s\":invalid:nomail" s))
(split-string (plist-get o :speakers) ", +")
"\r\n")
nil)
(string-trim
(org-icalendar-fold-string
(org-icalendar-cleanup-string
(concat "DESCRIPTION: Times are approximate and will probably change.\n"
"https://emacsconf.org/" emacsconf-year "/talks/" (plist-get o :slug) "\n"
(plist-get o :markdown)))))
"END:VEVENT"))
"\r\n"))
(defun emacsconf-format-as-ical (emacsconf-info)
(require 'ox-icalendar)
(let ((updated (format-time-string "%Y%m%dT%H%M%SZ" nil t)))
(string-join
(list
"BEGIN:VCALENDAR"
"VERSION:2.0"
"PRODID:EmacsConf"
(concat "X-WR-CALNAME:EmacsConf " emacsconf-year)
"X-WR-CALNAME:EmacsConf"
"CALSCALE:GREGORIAN"
"METHOD:PUBLISH"
(mapconcat (lambda (o) (emacsconf-ical-format-talk o updated))
(seq-remove (lambda (o) (string= (plist-get o :status) "CANCELLED"))
(emacsconf-filter-talks emacsconf-info))
"\r\n")
"END:VCALENDAR")
"\r\n")))
(defun emacsconf-generate-ical ()
(unless (file-directory-p emacsconf-directory) (error "Please specify the wiki directory in the emacsconf-directory variable."))
(with-temp-file (expand-file-name "emacsconf.ics" (expand-file-name emacsconf-year emacsconf-directory))
(insert (emacsconf-format-as-ical (emacsconf-get-talk-info)))))
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