scripts: add spotify script

scripts/spotify.sh

@@ -0,0 +1,24 @@
+#!/bin/sh
+# https://raw.githubusercontent.com/NicholasFeldman/dotfiles/master/polybar/.config/polybar/spotify.sh
+
+main() {
+  if ! pgrep -x spotify >/dev/null; then
+    echo ""; exit
+  fi  
+
+  cmd="org.freedesktop.DBus.Properties.Get"
+  domain="org.mpris.MediaPlayer2"
+  path="/org/mpris/MediaPlayer2"
+
+  meta=$(dbus-send --print-reply --dest=${domain}.spotify \
+    /org/mpris/MediaPlayer2 org.freedesktop.DBus.Properties.Get string:${domain}.Player string:Metadata)
+
+  artist=$(echo "$meta" | sed -nr '/xesam:artist"/,+2s/^ +string "(.*)"$/\1/p' | tail -1  | sed 's/\&/\\&/g' | sed 's#\/#\\/#g')
+  album=$(echo "$meta" | sed -nr '/xesam:album"/,+2s/^ +variant +string "(.*)"$/\1/p' | tail -1| sed 's/\&/\\&/g'| sed 's#\/#\\/#g')
+  title=$(echo "$meta" | sed -nr '/xesam:title"/,+2s/^ +variant +string "(.*)"$/\1/p' | tail -1 | sed 's/\&/\\&/g'| sed 's#\/#\\/#g')
+
+  echo "${*:-%artist% - %title%}" | sed "s/%artist%/$artist/g;s/%title%/$title/g;s/%album%/$album/g"i | sed "s/\&/\&/g" | sed "s#\/#\/#g"
+
+}
+
+main "$@"