#!/bin/bash
#
# Tom Huerlimann, office@thuinformatik.ch
# 24.04.2021 v1.0

# How old files should be identified
# (not mofiend since X days)
OLD_FILE="100"

# How big files should be identified
# (b - 512-byte blocks (this is the default if no suffix is used), c - bytes, w - two-byte words, k - Kilobytes, M - Megabytes, G - Gigabytes)
BIG_FILE="200M"

# Modify as required below
for FILE in /var/lib/docker/volumes/egroupware-docker_data/_data/default/files/groupdav/**/*.log;
 do
  FILELIST=`ls -ltrah "${FILE}"`
  echo "CHECK: "${FILE}" ..." 
  if [[ $(find "${FILE}" -type f -mtime +"${OLD_FILE}" -print) ]]; then
    echo "RESLT: file is old, can be deleted!"
    # echo ".. is not older than 100 days" 
    rm -rf "${FILE}"
    if [ $? -eq 0 ]; then
      echo "SCCSS: file has been deleted!" 
    else
      echo "ERROR: file can't be deleted!" 
    fi
    echo "RESLT: file is old, it has been deleted!"   
  else
    echo "RESLT: file is not old, check size ..."   
    if [[ $(find "${FILE}" -type f -size +"${BIG_FILE}" 2>/dev/null) ]]; then
      echo "CHECK: check rotation state ..."  
      for i in {5..1};
       do 
        if [ -f "${FILE}.5.tar.gz" ]; then
          echo "CHECK: 5.tar.gz present ..."
          rm -rf "${FILE}.5.tar.gz"
          if [ $? -eq 0 ]; then
            echo "SCCSS: file has been deleted!" 
          else
            echo "ERROR: file can't be deleted!" 
          fi
        fi
        if [ -f "${FILE}.4.tar.gz" ]; then
          echo "CHECK: 4.tar.gz present ..."
          mv -f "${FILE}.4.tar.gz" "${FILE}.5.tar.gz"
          if [ $? -eq 0 ]; then
            echo "SCCSS: file has been rotated!" 
          else
            echo "ERROR: file can't be rotated!" 
          fi
        fi
        if [ -f "${FILE}.3.tar.gz" ]; then
          echo "CHECK: 3.tar.gz present ..."
          mv -f "${FILE}.3.tar.gz" "${FILE}.4.tar.gz"
          if [ $? -eq 0 ]; then
            echo "SCCSS: file has been rotated!" 
          else
            echo "ERROR: file can't be rotated!" 
          fi
        fi
        if [ -f "${FILE}.2.tar.gz" ]; then
          echo "CHECK: 2.tar.gz present ..."
          mv -f "${FILE}.2.tar.gz" "${FILE}.3.tar.gz"
          if [ $? -eq 0 ]; then
            echo "SCCSS: file has been rotated!" 
          else
            echo "ERROR: file can't be rotated!" 
          fi
        fi
        if [ -f "${FILE}.1.tar.gz" ]; then
          echo "CHECK: 1.tar.gz present ..."
          mv -f "${FILE}.1.tar.gz" "${FILE}.2.tar.gz"
          if [ $? -eq 0 ]; then
            echo "SCCSS: file has been rotated!" 
          else
            echo "ERROR: file can't be rotated!" 
          fi
        fi
         if [ -f "${FILE}" ]; then
          echo "CHECK: current present ..."
          tar -czvf "${FILE}" "${FILE}.1.tar.gz"
          if [ $? -eq 0 ]; then
            echo "SCCSS: file has been compressed!" 
          else
            echo "ERROR: file can't be compressed!" 
          fi
          echo -n "" > "${FILE}"
          if [ $? -eq 0 ]; then
            echo "SCCSS: file has been truncated!" 
          else
            echo "ERROR: file can't be truncated!" 
          fi
        fi       
      done
    fi
  fi
done