#!/bin/bash

#static value assignment to a variable

list_file=lst	   #taking a variable into extraction list file

enc_tar_xtnsn=tar.gz.enc	#taking a variable into extraction encrypted file 

xtr_flptrn1=bw3-syst_INST 	#taking a variable into extraction file path

#main_scp=/usr/local/scripts/omniadm/omnftppasrv/extract.sh  #main extraction script

echo "Enter file processing date [YYYYMMDD]"
read file_x_date       

echo "Inst nu:"
read inst_nmb      

#breaking 80byte_flnm into YYYYMM and DD

yr_mnth=`echo "${file_x_date}"|awk '{print substr($0,1,6)}'`

only_dt=`echo "${file_x_date}"|awk '{print substr($0,7,8)}'`

#variable value assigned dynamically based on static value assignemnt above

xtr_flnm_list="${xtr_flptrn1}""${inst_nmb}"-"{$file_x_date}"\."{$list_file}"    #taking a variable into extraction file name

#---echo $xtr_flnm_list

xfile_pth=/backup/omnftppasrv/bw3/"${yr_mnth}"  # storing extraction file path into a variable

#---echo $xfile_pth

enc_tar_filename="${xtr_flptrn1}""${inst_nmb}"-"${file_x_date}"\."${enc_tar_xtnsn}"

#---echo $enc_tar_filename

#cmptl_extr_list_file=$xfile_pth/$xtr_flnm_list	#storing complete file name with path into a variable

#echo $cmptl_extr_list_file

cmptl_extr_enc_file="${xfile_pth}"/"${enc_tar_filename}"

echo $cmptl_extr_enc_file

echo "filename to extract"
read flnm_80byte    

	if [[ "$flnm_80byte" =~ .*\.prc ]]
	then
		echo "correct file name"
	elif [[ "$flnm_80byte" =~ .*\.inc ]]
	  then
		  strppd_flname=`echo $flnm_80byte|awk '{print substr($0, 1, length($0) - 4)}'`
		  flnm_80BYTE=$strppd_flname\.prc
		  echo $flnm_80BYTE
	  else
		  flnm_80BYTE=$flnm_80byte\.prc
		  echo $flnm_80BYTE
	  
	fi

#building regex for date searching
regex="{$yr_mnth}"\[0-9\]\[0-9\]

#building date searching regex list file
xtr_regex="${xtr_flptrn1}${inst_nmb}-${regex}\.${list_file}"

cmptl_extr_list_file="${xfile_pth}"/"${xtr_regex}"	#storing complete file name with path into a variable

echo $cmptl_extr_list_file

#grepping the filename from list file
/bin/grep "${flnm_80BYTE}" "${cmptl_extr_list_file}"