Hello everyone , I am looking for a better solution then the one I have created for the my Task

The task is:
Create an automated script that will check for Uploads in a specified Directory and move them to another specified Directory if the files are completely uploaded.

Files are FTP'd to the Specified directory
Multiple FTPS could be running so knowing if a particular FTP is complete is difficult for me to check by Process ID


I created the script listed below , but can see that issues can arise with Uploads of Trees
for instance
If the Upload directory has the following:

I am not sure , but if the last changed date of the stat command on a directory is older then the Age I am looking for
then shouldn;t that mean
that any file and sub directories below that Directory will be completely uploaded and also older then the Age I am looking for ?
...... I hope that made sense....
I do not think that is the case though....

I am hoping there is a better way to deal with this issue.

Thanks for being there.

#!/bin/bash
#
#
# This script will be used to monitor uploads to a specified directory
# and move them to another directory for downloading.
#
# Things to consider:
#       1. Was the uploaded files uploaded in a sub directory.
#       2. Are the files being uploaded complete.
#       3. Move the files to the specified directory
#          with the proper permissions.
#
#
#-------------------------------------------------------------------------------#
#
# Functions
#
#-------------------------------------------------------------------------------#
calc_time() {
        AGE_LAST_CHANGED=`expr ${CURRTIME} - ${FILE_LAST_CHANGED}`
        if [ ${AGE_LAST_CHANGED} -lt ${ACCEPTED_AGE} ];
        then
                OK_TO_MOVE=N
        else
                OK_TO_MOVE=Y
        fi
}
check_date() {
        FILE_LAST_CHANGED=`stat -t ${NEWFILE} |awk '{print $13}'`
}
#-------------------------------------------------------------------------------#
#
# Vairables will go here
#
#-------------------------------------------------------------------------------#
UPUSER=up_user
DOWNUSER=down_user
#
UPPATH=/home/Private/Uploads
DOWNPATH=/home/Private/Downloads

CURRTIME=`date +%s`
ACCEPTED_AGE=300        # 5 minutes of no activity according to date modified


for f in $( ls ${UPPATH} ); do

if [ -d ${UPPATH}/${f} ];
then
#--- Directory with Subfiles In it ---#
        DIR=${UPPATH}/${f}
        echo "${DIR} is a Directory"
        DIRDATE=`date +%Y_%m_%d_%H%M%S`
        NEWDIR=${DOWNPATH}/${f}_${DIRDATE}
        NEWFILE=${DIR}
        check_date
        calc_time
                # It appears that the directory has not been changed in the allowed timeframe (ACCEPTED_AGE)
                # it is ok to create a new directory in the DOWNPATH now.
                # set permissions of new directory to the download user
        mkdir ${NEWDIR}

        # This causes a problem by leaving the original Directory present in th UPLOADS directory.

        for f2 in $(ls  ${UPPATH}/$f ); do
                NEWFILE=${DIR}/${f2} # Set becuase of check_date function
                check_date
                calc_time
                if [ ${OK_TO_MOVE} = "Y" ];
                then
                        mv ${NEWFILE} ${NEWDIR}
                        echo "mv ${NEWFILE} ${NEWDIR} "
                else
                        echo "File date is too new to move better wait"
                fi

        chown -R ${DOWNUSER}:${DOWNUSER} ${NEWDIR}
        done

else
#--- File is in Main Upload directory ---#
        if [ -f ${UPPATH}/$f ]; then
                NEWFILE=${UPPATH}/${f}
                echo "${NEWFILE} is a file"
                check_date
                calc_time

                if [ ${OK_TO_MOVE} = "Y" ];
                then
                        mv ${NEWFILE} ${DOWNPATH}
                        echo "mv ${NEWFILE} ${DOWNPATH} "
                        chown ${DOWNUSER}:${DOWNUSER} ${DOWNPATH}/*
                else
                        echo "File date is too new to move better wait"
                        echo "next pass of cronjob should move this file"
                fi
        fi
fi

done