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+;;; jao-mpris.el --- mpris players control           -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2020  jao
+
+;; Author: jao <mail@jao.io>
+;; 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:
+
+;; controlling and showing info on mpris players
+
+;;; Code:
+
+(require 'dbus)
+(require 'jao-minibuffer)
+(require 'jao-emms-info-track)
+
+(defun jao-mpris--playerctl (&rest args)
+  (shell-command-to-string (format "playerctl %s"
+                                   (mapconcat #'shell-quote-argument args " "))))
+
+(defmacro jao-playerctl--def (name &rest args)
+  `(defun ,name () (interactive) (jao-mpris--playerctl ,@args)))
+
+(jao-playerctl--def jao-mpris-play-pause "play-pause")
+(jao-playerctl--def jao-mpris-next "next")
+(jao-playerctl--def jao-mpris-previous "previous")
+
+(defun jao-playerctl--status (&optional sep)
+  (let* ((sep (or sep " ||| "))
+         (fmt (mapconcat 'identity
+                         '("{{status}}"
+                           "{{xesam:trackNumber}}"
+                           "{{title}}"
+                           "{{artist}}"
+                           "{{album}}"
+                           "{{duration(mpris:length)}}")
+                         sep))
+         (m (jao-mpris--playerctl "metadata" "--format" fmt)))
+    (split-string (car (split-string m "\n")) sep)))
+
+;;;###autoload
+(defun jao-mpris-status-times ()
+  (interactive)
+  (let ((m (jao-mpris--playerctl "metadata" "--format"
+                                 (concat "{{duration(position)}}/"
+                                         "{{duration(mpris:length)}}"))))
+    (jao-notify (string-trim m) "Playing")))
+
+;;;###autoload
+(defun jao-mpris-show-osd ()
+  (interactive)
+  (jao-notify jao-spotify-track-string))
+
+;;;###autoload
+(defun jao-mpris-artist-title ()
+  (when-let (s (jao-mpris--playerctl "metadata"
+                                     "--format"
+                                     "{{artist}}|||{{title}}"))
+    (let ((s (split-string (string-trim s) "|||")))
+      (cons (car s) (cadr s)))))
+
+(defvar jao-mpris-track-string "")
+
+(defun jao-mpris--track (&rest info)
+  (let ((cs (or info (jao-playerctl--status))))
+    (if (string= "Playing" (or (elt cs 0) ""))
+        (let* ((track (format "%s" (elt cs 1)))
+               (title (elt cs 2))
+               (artist (elt cs 3))
+               (album (elt cs 4))
+               (length (elt cs 5))
+               (duration (cond ((stringp length) length)
+                               ((numberp length)
+                                (jao-emms--fmt-time (/ length 1e6) "")))))
+          (setq jao-mpris-track-string
+                (format "♪ %s %s %s%s%s"
+                        (jao--put-face track 'jao-emms-font-lock-track)
+                        (jao--put-face title 'jao-emms-font-lock-title)
+                        (jao--put-face artist 'jao-emms-font-lock-artist)
+                        (jao--put-face (if album (format " (%s)" album) "")
+                                       'jao-emms-font-lock-album)
+                        (if duration (format " [%s]" duration) ""))))
+      (setq jao-mpris-track-string "")))
+  (jao-minibuffer-refresh))
+
+(jao-minibuffer-add-variable 'jao-mpris-track-string t)
+
+(defun jao-mpris--handler (iname properties &rest args)
+  (when properties
+    (let ((st (caadr (assoc "PlaybackStatus" properties)))
+          (md (caadr (assoc "Metadata" properties))))
+      (cond ((and st (not (string= "Playing" st)))
+             (setq jao-spotify-track-string ""))
+            (md (let ((tno (caadr (assoc "xesam:trackNumber" md)))
+                      (tlt (caadr (assoc "xesam:title" md)))
+                      (art (caaadr (assoc "xesam:artist" md)))
+                      (alb (caadr (assoc "xesam:album" md)))
+                      (len (caadr (assoc "mpris:length" md))))
+                  (setq jao-debug md)
+                  (jao-mpris--track "Playing" tno tlt art alb len)))))))
+
+
+;;;###autoload
+(defun jao-mpris-minibuffer-register (name &optional bus)
+  (dbus-register-signal (or bus :session)
+                        name
+                        "/org/mpris/MediaPlayer2"
+                        "org.freedesktop.DBus.Properties"
+                        "PropertiesChanged"
+                        'jao-mpris--handler))
+
+
+(provide 'jao-mpris)
+;;; jao-mpris.el ends here