rmusic

#!/bin/bash
# Move music folders regularly to target, both to opus and flac directory.
# Meant for music I haven't listened to yet, to see if I should keep it or not.
# TODO: get rid of bash, rewrite in python



{
  set -e
  set -u


# MPD config for rmusic2.py
. "${ZDOTDIR:-$HOME/.config/zsh}"/10_globals.zsh

# for MOBILE_DIR
. "${ZDOTDIR:-$HOME/.config/zsh}"/11_locals.zsh

# for sources
. "${ZDOTDIR:-$HOME/.config/zsh}"/14_locals_bash.zsh

RMUSIC_LIMIT="${RMUSIC_LIMIT:-10}"

tgt_opus="$MOBILE_MUSIC/opus"
tgt_flac="$MOBILE_MUSIC/flac"
mkdir -p "$tgt_opus"
mkdir -p "$tgt_flac"

convert_to_opus(){
  # ffmpeg loglevel 24: only warnings
  find "$tgt_opus" -type f -iname '*.flac' -print0 | xargs -0 -r parallel --nice 19 -j 2 "ffmpeg -loglevel 24 -y -i {} -b:a 96k {.}.opus && rm {}" :::
}

space_taken(){
  # compute the space taken by the opus folder
  du -BM -s "$tgt_opus"  | awk '{gsub("M", "") ; print $1}'
}

delete_folders_not_in_other(){
  # delete the folders in $replica that are no longer in $origin
  origin="$1"
  replica="$2"
  find "$replica" -mindepth 1 -maxdepth 1 -type d -print0 | while IFS= read -d '' -r folder; do
    if [ ! -d "$origin"/"$(basename "$folder")" ]; then
      trash "$folder"
    fi
  done
}



# delete the folders in opus that are no longer in flac...
delete_folders_not_in_other "$tgt_flac" "$tgt_opus"
# ...and vice-versa
delete_folders_not_in_other "$tgt_opus" "$tgt_flac"

for ((i=1; i<=RMUSIC_LIMIT; i++ )); do
  taken="$(space_taken)"
  if [ "$taken" -ge 1000 ]; then
    break
  fi
  # otherwise, exits from rmusic{,2}.py. Better way?
  set +e
  p="$("$HOME"/.local/bin/rmusic.py "${RMUSIC_SOURCES[@]}")"
  if [ "$?" -ne 0 ]; then
    # no folder from first script
    # trying to use permanent sources, don't try to move the folder
    move="false"
    p="$("$HOME"/.local/bin/rmusic2.py)"
    if [ "$?" -ne 0 ]; then
      break
    fi

  else
    move="true"
  fi
  set -e
  folder_number="$(find "$tgt_flac" -mindepth 1 -maxdepth 1 -type d -printf 'A'| wc -c)"

  if [ "$folder_number" -ge "$RMUSIC_LIMIT" ]; then
    break
  fi

  cp -r -n "$p" "$tgt_opus"

  printf "%s" "$p" >> "$tgt_opus"/"$(basename "$p")"/rmusic_path

  if [ "$move" = "true" ]; then
    mv -n "$p" "$tgt_flac"
  else
    cp -r -n "$p" "$tgt_flac"
  fi

  find "$tgt_opus" -iname '+' -type d -prune -exec trash '{}' \;

  convert_to_opus > /dev/null
done

convert_to_opus
}