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;;; ics2org.el -- convert icalendar to org
;; Copyright (C) 2010, 2011 Michael Markert
;; Author: Michael Markert <>
;; Created: 2010/12/29
;; Version: 0.3.1
;; Keywords: org, calendar
;; This file is NOT part of 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 2
;; 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
;; 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, write to the Free Software
;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
;; MA 02110-1301, USA.
;;; Commentary:
;; Installation:
;; (require 'ical2org)
;;; Code:
(require 'icalendar)
(require 'org)
(require 'cl))
(defconst ical2org/version "0.3.1")
(defgroup ical2org nil
"Convert iCalendar files to orgmode files."
:link '(url-link :tag "Homepage" "")
:group 'calendar
:prefix "ical2org/")
(defcustom ical2org/event-format
"String used to format an event.
Syntax is {FIELD} valid values for FIELD are: SUMMARY, LOCATION, TIME, URL,
DESCRIPTION, ORGANIZER, CATEGORY. Namely the slots of the `ical2org/event'
struct (capitalized)."
:type '(string))
(defcustom ical2org/category-separator ":"
"String used to separate multiple categories."
:type '(string))
(defcustom ical2org/completing-read #'ido-completing-read
"Function used for completing read.
Has to be compatible to `completing-read'."
:type '(function))
(defun ical2org/convert-file (fname outfile &optional nosave)
"Convert ical events from file `FNAME' to `OUTFILE' and save when `NOSAVE' is non-nil."
(interactive "fFile to convert: \nFSave as: \nP")
(let ((events
(insert-file-contents (expand-file-name fname))
(ical2org/import-buffer (current-buffer)))))
(find-file outfile)
(goto-char (point-max))
(dolist (e events)
(insert (ical2org/format e))
(unless nosave
(defun ical2org/import-to-agenda (fname &optional nosave)
"Import ical events from file `FNAME' to agenda file (will be prompted).
Saves when `NOSAVE' is non-nil."
(interactive "fFile to import: \nP")
(let ((agenda-file (funcall ical2org/completing-read
"Agenda file: "
(insert-file-contents (expand-file-name fname))
(ical2org/import-buffer (current-buffer)))))
(find-file agenda-file)
(goto-char (point-max))
(dolist (e events)
(insert (ical2org/format e))
(unless nosave
(defun ical2org/buffer-to-buffer (in out)
"Convert ical events from buffer `IN' to buffer `OUT'."
(interactive "bIn: \nBOut: ")
(let ((events (ical2org/import-buffer in)))
(set-buffer (generate-new-buffer out))
(dolist (e events)
(insert (ical2org/format e))
(set-window-buffer nil out)
;; private
;; output formatting
(defun ical2org/format (event)
"Replace formatstrings with slots of `EVENT'."
(replace-regexp-in-string "{.*?}"
(lambda (z)
(cdr (assoc z
`(("{SUMMARY}" . ,(ical2org/event-summary event))
("{LOCATION}" . ,(ical2org/event-location event))
("{TIME}" . ,(ical2org/event-org-timestr event))
("{URL}" . ,(ical2org/event-url event))
("{DESCRIPTION}" . ,(ical2org/event-description event))
("{ORGANIZER}" . ,(ical2org/event-organizer event))
("{CATEGORY}" . ,(mapconcat 'identity
(ical2org/event-category event)
t t))
(defun ical2org/org-recurrent (event start-decoded start-time end-time)
"Wrap `icalendar--convert-recurring-to-diary' diary in an org timestamp."
(format "<%s>"
(icalendar--convert-recurring-to-diary event start-decoded
start-time end-time)))
(defun ical2org/org-timestamp (start end)
"Format `START' and `END' as `org-time-stamp'."
(let ((start-time (nth 2 start))
(end-time (nth 2 end))
(start (car start))
(end (car end)))
(if end
(format "%s--%s" (ical2org/org-time-fmt start start-time)
(ical2org/org-time-fmt end end-time))
(if start
(ical2org/org-time-fmt start start-time)))))
(defun ical2org/org-time-fmt (time &optional with-hm)
"Format `TIME' as `org-time-stamp', if `WITH-HM' is non-nil included hh:mm.
`TIME' is an decoded time as returned from `decode-time'."
(let ((fmt (if with-hm
(cdr org-time-stamp-formats)
(car org-time-stamp-formats)))
(encoded-time (apply 'encode-time time)))
(format-time-string fmt encoded-time)))
;; entry processing
(defstruct ical2org/event
(summary "")
(location "")
(org-timestr "")
(url "")
(description "")
(organizer "")
(category '()))
(defun ics2org/datetime (property event zone-map)
"Return datetime values for `PROPERTY' of `EVENT' with `ZONE-MAP'.
Return a triple of (decoded isodate time).
Where `decoded' is a decoded datetime,
`isodate' a date as yy mm dd string,
`time' a time as hh:mm string."
(let* ((dt (icalendar--get-event-property event property))
(zone (icalendar--find-time-zone
(icalendar--get-event-property-attributes event property) zone-map))
(decoded (icalendar--decode-isodatetime dt nil zone-map)))
(list decoded
(icalendar--datetime-to-iso-date decoded)
(icalendar--datetime-to-colontime decoded)))))
(defun ical2org/get-property (event property &optional default clean)
"Return `PROPERTY' of `EVENT' or `DEFAULT'."
(let ((prop (or (icalendar--get-event-property event property)
(if clean
(icalendar--convert-string-for-import prop)
(defun ical2org/get-org-timestr (event zone-map)
"Return org-timestring for `EVENT' with `ZONE-MAP'."
(let* ((start (ics2org/datetime 'DTSTART event zone-map))
(start-day (nth 1 start))
(start-time (nth 2 start))
(end (ics2org/datetime 'DTEND event zone-map))
(end-day (or (nth 1 end) start-day))
(end-time (or (nth 2 end) start-time))
(rrule (icalendar--get-event-property event 'RRULE))
(rdate (icalendar--get-event-property event 'RDATE))
(duration (icalendar--get-event-property event 'DURATION)))
(when duration
(let ((new-end (icalendar--add-decoded-times
(car start)
(icalendar--decode-isoduration duration))))
(setq end-day (icalendar--datetime-to-iso-date new-end))
(setq end-time (icalendar--datetime-to-colontime new-end))
(setq end (list new-end end-day end-time))))
(rrule (ical2org/org-recurrent event (car start) start-time end-time))
(t (ical2org/org-timestamp start end)))))
(defun ical2org/extract-event (ical-event zone-map)
"Extracts `ical2org/event' from `ICAL-EVENT' using the timezone map `ZONE-MAP'."
(let ((summary (ical2org/get-property ical-event 'SUMMARY "" t))
(location (ical2org/get-property ical-event 'LOCATION "" t))
(org-timestr (ical2org/get-org-timestr ical-event zone-map))
(url (ical2org/get-property ical-event 'URL ""))
(description (ical2org/get-property ical-event 'DESCRIPTION "" t))
(organizer (ical2org/get-property ical-event 'ORGANIZER "" t))
(category (split-string (ical2org/get-property ical-event 'CATEGORIES "" t)
"," t)))
(make-ical2org/event :summary summary
:location location
:org-timestr org-timestr
:url url
:description description
:organizer organizer
:category category)))
(defun ical2org/import-elements (ical-elements)
"Collects events from `ICAL-ELEMENTS' into a list of `ical2org/event's."
(let ((events (icalendar--all-events ical-elements))
(zone-map (icalendar--convert-all-timezones ical-elements)))
(loop for event in events
collect (ical2org/extract-event event zone-map))))
(defun ical2org/import-buffer (buffer)
"Return all events in icalendar `BUFFER' as `ical2org/event's."
(set-buffer (icalendar--get-unfolded-buffer buffer))
(goto-char (point-min))
(if (re-search-forward "^BEGIN:VCALENDAR\\s-*$" nil t)
(ical2org/import-elements (icalendar--read-element nil nil)))
(message "Buffer does not contain icalendar contents!"))))
(provide 'ical2org)
;;; ical2org.el ends here