1 #!/bin/sh -e
2 # mpc-notify: sends notification of currently playing MPD music accompanied
3 # by album cover art.
4 
5 # exit early if we're in tty
6 if [ -z "$WAYLAND_DISPLAY" ] && [ -z "$DISPLAY" ]; then
7 	exit 2
8 fi
9 
10 # globals
11 command="$1"
12 use_preview=0
13 
14 # defaults
15 # FEATURE: make defaults configurable through flags
16 preview_dir="${XDG_CONFIG_HOME:-$HOME/.config}/mpc/previews"
17 preview_width=64
18 preview_height=64
19 default_song_icon="media-playback-start"
20 
21 # issue an mpc command based on arguments and assemble notification message
22 case "$command" in
23 "")
24 	# use defaults
25 	song_head="Now Playing"
26 	use_preview=1
27 	;;
28 "stop")
29 	mpc -q stop
30 	song_head="Stopped Playing"
31 	song_icon="media-playback-stop"
32 	;;
33 "toggle")
34 	mpc -q toggle
35 	state="$(mpc status %state%)"
36 	case "$state" in
37 	"playing")
38 		song_head="Now Playing"
39 		use_preview=1
40 		;;
41 	"paused")
42 		song_head="Paused"
43 		song_icon="media-playback-pause"
44 		;;
45 	esac
46 	;;
47 "shuffle")
48 	mpc -q shuffle
49 	song_head="Shuffled Playlist"
50 	song_icon="media-playlist-shuffle"
51 	;;
52 "single")
53 	mpc -q single
54 	state="$(mpc status %single%)"
55 	case "$state" in
56 	"on")
57 		song_head="Single Mode: On";;
58 	"once")
59 		song_head="Single Mode: Once";;
60 	"off")
61 		song_head="Single Mode: Off";;
62 	esac
63 	# TODO: consider a more appropriate icon
64 	song_icon="multimedia-player"
65 	;;
66 "random")
67 	mpc -q random
68 	state="$(mpc status %random%)"
69 	case "$state" in
70 	"on")
71 		song_head="Random Mode: On";;
72 	"off")
73 		song_head="Random Mode: Off";;
74 	esac
75 	# TODO: consider a more appropriate icon
76 	song_icon="media-eject"
77 	;;
78 "repeat")
79 	mpc -q repeat
80 	state="$(mpc status %repeat%)"
81 	case "$state" in
82 	"on")
83 		song_head="Repeat Mode: On";;
84 	"off")
85 		song_head="Repeat Mode: Off";;
86 	esac
87 	song_icon="media-playlist-repeat"
88 	;;
89 *)
90 	mpc -q "$command"
91 	# don't notify if mpc changed song because ncmpcpp would notify on
92 	# song change anyway
93 	[ "$command" = "next" ] || [ "$command" = "prev" ] && exit
94 	;;
95 esac
96 
97 # use album preview for song icon
98 if [ "$use_preview" -eq 1 ]; then
99 	[ -d "$preview_dir" ] || mkdir -p "$preview_dir"
100 
101 	# find xdg music directory
102 	# user-dirs.dirs is not guaranteed to exist
103 	# shellcheck disable=SC1091
104 	. "${XDG_CONFIG_HOME:-$HOME/.config}/user-dirs.dirs" 2>/dev/null || true
105 	xdg_music_dir="${XDG_MUSIC_DIR:-$HOME/Music}"
106 
107 	# get preview filename
108 	song_filename="$(mpc --format "${xdg_music_dir}/%file%" current)"
109 	song_album_name="$(mpc --format %album% current)"
110 	if [ -z "$song_album_name" ]; then
111 		# fallback to the default icon for an empty album name
112 		song_icon="$default_song_icon"
113 	else
114 		preview_path="${preview_dir}/$(echo "$song_album_name" | base64).png"
115 		if [ -f "$preview_path" ]; then
116 			# use cached preview
117 			song_icon="$preview_path"
118 		elif ffmpeg -y -i "$song_filename" -an -vf \
119 			scale="${preview_width}:${preview_height}" \
120 			"$preview_path" >/dev/null 2>&1;
121 		then
122 			# or use generated preview
123 			song_icon="$preview_path"
124 		else
125 			song_dirname=$(dirname "$song_filename")
126 			if art_filename="$(find "$song_dirname" -type f |
127 				grep -Esm 1 '.*\.(jpg|png)')"
128 			then
129 				# or use scaled cover art from directory
130 				ffmpeg -y -i "$art_filename" -an -vf \
131 					scale="${preview_width}:${preview_height}" \
132 					"$preview_path" >/dev/null 2>&1;
133 				song_icon="$preview_path"
134 			else
135 				# or fallback to default icon
136 				song_icon="$default_song_icon"
137 			fi
138 		fi
139 	fi
140 fi
141 
142 # now send the actual notification
143 song_body="$(mpc --format '[%title%[ \n%artist% - %album%]]|[%file%]' current)"
144 notify-replace 'mpc-notify' "$song_head" "$song_body" -i "$song_icon" -u low