#!/bin/bash
# @autor 6543@obermui.de
# @date 2019-01-09
# @version 0.2

function free() {
  df "$1" | grep '/dev/' | sed -r -e "s/[\t\ ]+/ /g" | cut -d ' ' -f 4
}

md5="2cp"
aim="/tmp/sdl/oberoed"


md5_tmp=`mktemp`
freenow=0

cat "$md5" > "$md5_tmp"
cat "$md5_tmp" | while read line; do
  file_orig="$(echo $line | cut -c 33- | sed -r -e "s/^[\ ]//g")"
  file_size=$(du "$file_orig" | cut -f 1)
  file_md5=$(echo $line | cut -c -32)
  file_aim_dir=$(echo $file_orig | rev | cut -d '/' -f 2- | rev | sed 's/data\/shares\/Filme/tmp\/sdl\/oberoed/g')
  file_aim=$(echo $file_orig | sed 's/data\/shares\/Filme/tmp\/sdl\/oberoed/g')

  [ "$file_orig" == "$file_aim" ] && { echo Script ERROR; exit 255; }

  freenow=$(free "$aim")
  #add puffer
  freenow=$((freenow-10240))

  if [ -f "$file_orig" ]; then

    if [ "$freenow" -ge "$file_size" ]; then

      mkdir -p "$file_aim_dir"
      [ -f "$file_aim" ] && rm "$file_aim"

      file_md5_new=$(cat "$file_orig" | tee "$file_aim" | md5sum | cut -c -32)

      if [ "${file_md5_new}" == "${file_md5}" ]; then
        echo "$file_md5  $file_aim" >> /tmp/sdl/md5.txt
        sed -i "/$file_md5/d" "$md5"
      else
        echo "Error: Hash mismatch: \"NEW:${file_md5_new} OLD:${file_md5}\" $file_aim"
        rm "$file_aim"
      fi

    else
      echo "To Big: $file_md5  $file_orig"
    fi

  else
    echo "Error: Not Exist: $file_orig"
    sed -i "/$file_md5/d" "$md5"
  fi
done

rm "$md5_tmp"
