Updates

common/ncmpcpp/song-notify

@@ -0,0 +1,57 @@
+#!/usr/bin/env bash
+# Desktop notification with cover art on song change. Run by ncmpcpp's
+# execute_on_song_change, so it only fires while ncmpcpp is open.
+#
+# mopidy: Mopidy-MPD has no albumart command, so the cover comes from the
+# Subsonic server behind Mopidy-Subidy. url and username are read from
+# mopidy.conf, the password from the untracked secrets.conf.
+# Usage: song-notify [subidy:song:<id>]   (defaults to the current song)
+
+set -u
+
+conf=~/.config/mopidy/mopidy.conf
+secrets=~/.config/mopidy/secrets.conf
+cache=${XDG_CACHE_HOME:-$HOME/.cache}/ncmpcpp/covers
+
+fmt='%file%\t%artist%\t%title%\t%album%'
+if [ $# -gt 0 ]; then
+  line=$(mpc -f "$fmt" playlist 2>/dev/null |
+    awk -F'\t' -v u="$1" '$1 == u { print; exit }')
+else
+  line=$(mpc -f "$fmt" current 2>/dev/null)
+fi
+IFS=$'\t' read -r uri artist title album <<<"$line"
+[ -n "$uri" ] || exit 0
+
+# Value of key in [subidy] of an ini file.
+ini() {
+  awk -F' *= *' -v k="$2" '
+    /^\[/ { s = ($0 == "[subidy]") }
+    s && $1 == k { print $2; exit }' "$1"
+}
+
+cover=
+id=${uri#subidy:song:}
+if [ "$id" != "$uri" ] && [ -r "$secrets" ]; then
+  url=$(ini "$conf" url)
+  user=$(ini "$conf" username)
+  pass=$(ini "$secrets" password)
+  salt=$(head -c 8 /dev/urandom | od -An -tx1 | tr -d ' \n')
+  token=$(printf '%s%s' "$pass" "$salt" | md5sum | cut -d' ' -f1)
+  auth="u=$user&t=$token&s=$salt&v=1.16.1&c=ncmpcpp"
+
+  art=$(curl -fsS --max-time 5 "$url/rest/getSong.view?$auth&f=json&id=$id" |
+    jq -r '."subsonic-response".song.coverArt // empty')
+  if [ -n "$art" ]; then
+    cover=$cache/${art////_}
+    if [ ! -s "$cover" ]; then
+      mkdir -p "$cache"
+      curl -fsS --max-time 10 -o "$cover" \
+        "$url/rest/getCoverArt.view?$auth&id=$art&size=256" || cover=
+    fi
+  fi
+fi
+
+notify-send -a ncmpcpp ${cover:+-i "$cover"} \
+  -h string:x-canonical-private-synchronous:ncmpcpp \
+  "${title:-$uri}" "${artist:-}${album:+ — $album}"