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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:
(defvar emacsconf-ical-public-directory (concat "/ssh:orga@media.emacsconf.org:/var/www/media.emacsconf.org/" emacsconf-year)
"Directory to post ics files to.")
(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-fold (s)
(replace-regexp-in-string
"\r\n$" ""
(replace-regexp-in-string
"\n" "\r\n"
(string-trim
(org-icalendar-fold-string
(org-icalendar-cleanup-string
s))))))
(defun emacsconf-ical-format-talk (o &optional updated)
(string-join
(delq
nil
(list
"BEGIN:VEVENT"
(emacsconf-ical-fold
(concat "SUMMARY:" (plist-get o :title)
(emacsconf-surround " - " (plist-get o :speakers) "" "")))
"ORGANIZER:EmacsConf"
(concat "LOCATION:" (plist-get (emacsconf-get-track (plist-get o :track)) :watch))
(if (plist-get o :uuid)
(concat "UID:" (plist-get o :uuid))
(concat "UID:" emacsconf-id "-" emacsconf-year "-" (plist-get o :slug)))
(concat "URL:" (plist-get o :absolute-url))
(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))
(emacsconf-ical-fold
(emacsconf-replace-plist-in-string
(append o
(list
:year emacsconf-year
:watch-url (plist-get (emacsconf-get-track (plist-get o :track)) :watch)
:stream (plist-get (emacsconf-get-track (plist-get o :track)) :stream)
:replay
(if (plist-get o :video-file) "There is a pre-recorded video for this talk, so it should be available from ${url} shortly after the talk starts."
(format "This talk is live. We'll upload it to %s%s by January or so. You can subscribe to emacsconf-discuss for updates: https://lists.gnu.org/mailman/listinfo/emacsconf-discuss"
emacsconf-media-base-url
emacsconf-year))
:speaker-text (emacsconf-surround
(if (length= (plist-get o :speakers) 1) "\nSpeaker: " "\nSpeakers: ")
(plist-get o :speakers)
"" "")))
"DESCRIPTION:${url}${speaker-text}
Times are approximate and may change. Please check the talk webpage for details and other resources.
Watch live using a streaming media player. Some examples:
mpv ${stream}
vlc ${stream}
ffplay ${stream}
or watch using the web-based player: ${watch-track}
Q&A: ${qa-info}
${replay}
Description:
${markdown}
"))
"END:VEVENT"))
"\r\n"))
(defun emacsconf-format-as-ical (emacsconf-info &optional title)
(require 'ox-icalendar)
(let ((updated (format-time-string "%Y%m%dT%H%M%SZ" nil t)))
(string-join
(list
"BEGIN:VCALENDAR"
"VERSION:2.0"
(concat "PRODID:" emacsconf-name "-" emacsconf-year (emacsconf-surround "-" title "" ""))
(concat "X-WR-CALNAME:" emacsconf-name " " emacsconf-year (emacsconf-surround " " title "" ""))
"CALSCALE:GREGORIAN"
"METHOD:PUBLISH"
(mapconcat
(lambda (o) (emacsconf-ical-format-talk o updated))
(emacsconf-publish-prepare-for-display (emacsconf-filter-talks emacsconf-info))
"\r\n")
"END:VCALENDAR")
"\r\n")))
;;;###autoload
(defun emacsconf-ical-generate-all ()
(interactive)
(let* ((emacsconf-talk-info-functions (append emacsconf-talk-info-functions (list 'emacsconf-get-abstract-from-wiki)))
(info (emacsconf-get-talk-info)))
(emacsconf-ical-generate-main info)
(emacsconf-ical-generate-tracks info)))
(defun emacsconf-ical-generate-main (&optional info)
(with-temp-file (expand-file-name "emacsconf.ics"
(or emacsconf-ical-public-directory
(expand-file-name emacsconf-year emacsconf-directory)))
(insert (emacsconf-format-as-ical (emacsconf-publish-prepare-for-display (or info (emacsconf-get-talk-info)))))))
(defun emacsconf-ical-generate-tracks (&optional info)
(interactive)
(mapc (lambda (entry)
(let ((track (emacsconf-get-track (car entry))))
(when track
(with-temp-file (expand-file-name (format "emacsconf-%s.ics" (plist-get track :id))
(or emacsconf-ical-public-directory
(expand-file-name emacsconf-year emacsconf-directory)))
(insert (emacsconf-format-as-ical (cdr entry)
(plist-get track :name)))))))
(seq-group-by (lambda (o) (plist-get o :track)) (emacsconf-publish-prepare-for-display (or info (emacsconf-get-talk-info))))))
(provide 'emacsconf-ical)
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