#!/bin/bash
base_dir=/mnt/
music_dir=NAS/music/other/deemix\ Music/
playlistweek=/var/lib/mpd/playlists/New\ last\ week.m3u
playlistmonth=/var/lib/mpd/playlists/New\ last\ month.m3u
playlist2month=/var/lib/mpd/playlists/New\ last\ 2\ months.m3u

if [ "$base_dir$music_dir" -nt "$playlist" ] || [ ! -f "$playlist" ];
then
  cd $base_dir
  find "$music_dir" -type f -mtime -7 -iname "*.mp3" -o -iname "*.ogg" > "$playlistweek"
fi

if [ "$base_dir$music_dir" -nt "$playlist" ] || [ ! -f "$playlist" ];
then
  cd $base_dir
  find "$music_dir" -type f -mtime -31 -iname "*.mp3" -o -iname "*.ogg" > "$playlistmonth"
fi

if [ "$base_dir$music_dir" -nt "$playlist" ] || [ ! -f "$playlist" ];
then
  cd $base_dir
  find "$music_dir" -type f -mtime -61 -iname "*.mp3" -o -iname "*.ogg" > "$playlist2month"
fi