;;; my-time.el -- Time related extensions for emacs core -*- lexical-binding: t -*-

;; Copyright (C) 2023 Free Software Foundation.

;; Author: Yuchen Pei <id@ypei.org>
;; Package-Requires: ((emacs "28.2"))

;; This file is part of dotfiles.

;; dotfiles is free software: you can redistribute it and/or modify it
;; under the terms of the GNU Affero General Public License as
;; published by the Free Software Foundation, either version 3 of the
;; License, or (at your option) any later version.

;; dotfiles 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
;; Affero General Public License for more details.

;; You should have received a copy of the GNU Affero General Public
;; License along with dotfiles.  If not, see
;; <https://www.gnu.org/licenses/>.

;;; Commentary:

;; Time related extensions for emacs core. Covers time, date, diary, etc.

;;; Code:



;; To be called from diary-sexp-entry, where DATE, ENTRY are bound.
(defun my-diary-offset (sexp days)
  "Offsetted diary entry.
Entry applies if the date is DAYS days after another diary-sexp SEXP."
  (with-no-warnings (defvar date) (defvar entry))
  (integerp days)
  (let ((date
	       (calendar-gregorian-from-absolute
	        (- (calendar-absolute-from-gregorian date) days))))
    (eval sexp)))

(defun my-appt-display-window (min-to-appt new-time appt-msg)
	(or (listp min-to-appt)
	    (setq min-to-appt (list min-to-appt)
		        appt-msg (list appt-msg)))
	(org-notify (format
		           "In %s minutes: %s" (car min-to-appt) (car appt-msg))))

(provide 'my-time)
;;; my-time.el ends here