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;;; timestring.el --- Quickly access timestamps in different formats -*- lexical-binding: t -*-
;; Author: William Carroll <wpcarro@gmail.com>
;; Version: 0.0.1
;; URL: https://git.wpcarro.dev/wpcarro/briefcase
;; Package-Requires: ((emacs "25.1"))
;;; Commentary:
;; I was making some API calls where a URL needed a `since` parameter that of an
;; RFC 3339 encoded string.
;;
;; Because I didn't know what a RFC 3339 encoded
;; string was at the time, and because I didn't know what its format was
;; according to strftime, and because I'm most likely to forget both of these
;; things by the next time that I need something similar, I decided to write
;; this package so that I can accumulate a list of common time encodings.
;;
;; Thank you, Emacs.
;;
;; p.s. - I may turn this into a proper module and publish it. But not today.
;;; Code:
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Dependencies
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(require 'ts)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Library
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defgroup timestring nil
"Customize group for timestring configuration.")
(defcustom timestring-supported-encodings
'(("RFC 3339" . "%Y-%m-%dT%H:%M:%SZ")
;; Does anyone recognize this format?
("IDK" . "%Y-%m-%d %H:%M:%S %z"))
"Mapping of encoding names to their format strings."
:group 'timestring)
(defcustom timestring-supported-times
'(("yesterday" . timestring--yesterday)
("now" . ts-now)
("tomorrow" . timestring--tomorrow))
"Mapping of a labels to the functions that create those time objects."
:group 'timestring)
(defun timestring--yesterday ()
"Return a time object for yesterday."
(ts-adjust 'day -1 (ts-now)))
(defun timestring--tomorrow ()
"Return a time object for yesterday."
(ts-adjust 'day +1 (ts-now)))
(defun timestring--completing-read (label xs)
"Call `completing-read' with LABEL over the collection XS."
(alist-get (completing-read label xs) xs nil nil #'equal))
(defun timestring-copy-encoded-time ()
"Select a common time and an encoding.
The selected time will be encoded using the selected encoding and copied onto
your clipboard."
(interactive)
(let ((time (funcall (timestring--completing-read
"Time: " timestring-supported-times)))
(fmt (timestring--completing-read
"Encoding: " timestring-supported-encodings)))
(kill-new (ts-format fmt time))
(message "Copied!")))
(provide 'timestring)
;;; timestring.el ends here
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