musictag

#!/bin/bash
##### MP3 tagger/renamer [prereq: eyeD3]
### v0.3 - correct mp3 filename handling with IFS
### v0.2 - var rewrite for lead/trail spaces
### v0.1 - first rev + renaming

# Load myecho for nicer output
if ! type _MYECHO >/dev/null 2>&1; then
  if [ -f "/etc/profile.d/01-myecho-colors.sh" ]; then
    source /etc/profile.d/01-myecho-colors.sh >/dev/null 2>&1
  elif [ -f "$HOME/01-myecho-colors.sh" ]; then
    source "$HOME/01-myecho-colors.sh" >/dev/null 2>&1
  else
    echo "Nice Output - Install 'myecho' function (in homedir: 01-myecho-colors.sh)"
    cd "$HOME"
    curl -s -LO https://raw.githubusercontent.com/zephxs/bash/master/functions/01-myecho-colors.sh
    head -20 01-myecho-colors.sh |grep -q "^_MYECHO () {" && echo "myecho installed!" || { echo "myecho install failed, exit.."; exit 1; }
    source "$HOME/01-myecho-colors.sh" >/dev/null 2>&1
  fi
fi

# usage
[ "$1" = '-h' -o "$1" = '--help' ] && _MYECHO -p "Usage:
# Accept mp3 file as only argument" && \
echo "$(basename $0) /path/to/file.mp3

" && exit 0

### AUTO INSTALLER / UPDATER for Termux
if type pkg >/dev/null ; then
# required pipx for easy install and update under venv
type pip >/dev/null || ( echo "... Installing pipx" && pkg install python3 && python3 -m pip install pipx; )
# install yt-dlp and update if bin older than 15 days
find $(type -P eyeD3) -mtime +15 -exec python3 -m pipx upgrade eyeD3 \; || python3 -m pipx install eyeD3
fi

# test mp3 file path as only argument
[ -z "$1" ] && { echo "Please input file path as argument" && exit 1; } || _MP3="$@"
[ -f "$_MP3" ] || { echo "$_MP3 is not a valid file.." &&  exit 1; }

_MYECHO -l
_MYECHO "MP3 file"
[ "$(awk -F'.' '{print $NF}' <<<$_MP3)" = 'mp3' ] && _OK || { _KO; _MYECHO -c red -p "Not a valid mp3 file"; exit 1; }
_MYECHO -c green -p "$_MP3"

# mod IFS for files containing spaces
_OLDIFS="$IFS" && IFS=''
_MP3Z="$(basename -s '.mp3' $_MP3 |sed 's/,/ /g;s/!/ /g;s/#/ /g;   s/_/ /g; ')"
_ARTISTZ="${_MP3Z%%-*}"
_SONGZ="${_MP3Z##*-}"
# remove leading and trailing spaces
_SONGZ="${_SONGZ#"${_SONGZ%%[![:space:]]*}"}"
_SONGZ="${_SONGZ%"${_SONGZ##*[![:space:]]}"}"
_ARTISTZ="${_ARTISTZ%"${_ARTISTZ##*[![:space:]]}"}"

# MP3 Tag
_MYECHO -s "tags:"
eyeD3 "$_MP3"
echo
# Tag edition
read -n 1 -p "Edit ID3 tag? [Yes/No/All] : "
case $REPLY in
  n|N) echo ;;
  a|A) echo
    _MYECHO -s "Artist:"
    read -e -i "$_MP3Z" _ARTIST
    _MYECHO -s "Song:"
    read -e -i "$_MP3Z" _SONG
    eyeD3 -a "$_ARTIST" -t "$_SONG" "$_MP3"
    ;;
  *) echo
    _MYECHO -s "Artist:"
    read -e -i "$_ARTISTZ" _ARTIST
    _MYECHO -s "Song:"
    read -e -i "$_SONGZ" _SONG
    eyeD3 -a "$_ARTIST" -t "$_SONG" "$_MP3"
    ;;
esac

# File rename
read -n 1 -p "Rename? [Yes/No/All] : "
case $REPLY in
  n|N) echo && exit 0 ;;
  a|A) echo 
    _MYECHO -s "MP3 Name:"
    read -e -i "$_MP3Z" _MP3NAME
    mv "$_MP3" "$(dirname $_MP3)/${_MP3NAME}.mp3"
    ;;
  *) echo
    if [ -z "$_ARTIST" ]; then
      _MYECHO -s "MP3 Name:"
      read -e -i "$_MP3Z" _MP3NAME
      mv "$_MP3" "$(dirname $_MP3)/${_MP3NAME}.mp3"
      _MYECHO -c green -p "$(dirname $_MP3)/${_MP3NAME}.mp3"
    else
      mv "$_MP3" "$(dirname $_MP3)/${_ARTIST}-${_SONG}.mp3"
      _MYECHO -c green -p "$(dirname $_MP3)/${_ARTIST}-${_SONG}.mp3"
    fi
    ;;
esac