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;;; emms-last-played.el --- Support for last-played-time of a track -*- lexical-binding: t; -*-
;; Copyright (C) 2006-2021 Free Software Foundation, Inc.
;; Author: Lucas Bonnet <lucas@rincevent.net>
;; Keywords: emms, mp3, mpeg, multimedia
;; This file is part of EMMS.
;; EMMS 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, or (at your option)
;; any later version.
;; EMMS 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 EMMS; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; Records when the track was last played.
;; Big portions of the time handling fuctions are copied from
;; gnus-util.el, and slightly adapted.
;;; Code:
(require 'emms)
(defvar emms-last-played-keep-count t
"Specifies if EMMS should record the number of times you play a track.
Set it to t if you want such a feature, and to nil if you don't.")
(defvar emms-last-played-format-alist
'(((emms-last-played-seconds-today) . "%k:%M")
(604800 . "%a %k:%M") ;;that's one week
((emms-last-played-seconds-month) . "%a %d")
((emms-last-played-seconds-year) . "%b %d")
(t . "%b %d '%y")) ;;this one is used when no
;;other does match
"Specifies date format depending on when a track was last played.
This is an alist of items (AGE . FORMAT). AGE can be a number (of
seconds) or a Lisp expression evaluating to a number. When the age of
the track is less than this number, then use `format-time-string'
with the corresponding FORMAT for displaying the date of the track.
If AGE is not a number or a Lisp expression evaluating to a
non-number, then the corresponding FORMAT is used as a default value.
Note that the list is processed from the beginning, so it should be
sorted by ascending AGE. Also note that items following the first
non-number AGE will be ignored.
You can use the functions `emms-last-played-seconds-today',
`emms-last-played-seconds-month' and
`emms-last-played-seconds-year' in the AGE spec. They return the
number of seconds passed since the start of today, of this month,
of this year, respectively.")
(defun emms-last-played-update-track (track)
"Updates the last-played time of TRACK."
(emms-track-set track 'last-played (current-time)))
(defun emms-last-played-increment-count (track)
"Increments the play-count property of TRACK.
If non-existent, it is set to 1."
(let ((play-count (emms-track-get track 'play-count)))
(if play-count
(emms-track-set track 'play-count (1+ play-count))
(emms-track-set track 'play-count 1))))
(defun emms-last-played-update-current ()
"Updates the current track."
(emms-last-played-update-track (emms-playlist-current-selected-track))
(if emms-last-played-keep-count
(emms-last-played-increment-count (emms-playlist-current-selected-track))))
(defun emms-last-played-seconds-today ()
"Return the number of seconds passed today."
(let ((now (decode-time (current-time))))
(+ (car now) (* (car (cdr now)) 60) (* (car (nthcdr 2 now)) 3600))))
(defun emms-last-played-seconds-month ()
"Return the number of seconds passed this month."
(let ((now (decode-time (current-time))))
(+ (car now) (* (car (cdr now)) 60) (* (car (nthcdr 2 now)) 3600)
(* (- (car (nthcdr 3 now)) 1) 3600 24))))
(defun emms-last-played-seconds-year ()
"Return the number of seconds passed this year."
(let ((now (decode-time (current-time)))
(days (format-time-string "%j" (current-time))))
(+ (car now) (* (car (cdr now)) 60) (* (car (nthcdr 2 now)) 3600)
(* (- (string-to-number days) 1) 3600 24))))
(defun emms-last-played-format-date (messy-date)
"Format the messy-date according to `emms-last-played-format-alist'.
Returns \" ? \" if there's bad input or if an other error occurs.
Input should look like this: \"Sun, 14 Oct 2001 13:34:39 +0200\"."
(condition-case ()
(let* ((messy-date (float-time messy-date))
(now (float-time (current-time)))
;;If we don't find something suitable we'll use this one
(my-format "%b %d '%y"))
(let* ((difference (- now messy-date))
(templist emms-last-played-format-alist)
(top (eval (caar templist) t)))
(while (if (numberp top) (< top difference) (not top))
(progn
(setq templist (cdr templist))
(setq top (eval (caar templist) t))))
(if (stringp (cdr (car templist)))
(setq my-format (cdr (car templist)))))
(format-time-string (eval my-format t) (seconds-to-time messy-date)))
(error "Never.")))
(provide 'emms-last-played)
;;; emms-last-played.el ends here
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