#!/usr/bin/env bash

# @(#) s1       Demonstrate date/time difference, dconf, ddiff.

# Utility functions: print-as-echo, print-line-with-visual-space, debug.
# export PATH="/usr/local/bin:/usr/bin:/bin"
LC_ALL=C ; LANG=C ; export LC_ALL LANG
pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
em() { pe "$*" >&2 ; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C dateutils.dconv dateutils.ddiff

# Function absolute value.
abs() { v1="$1"; [ "$v1" -lt 0 ] && echo "${v1:1}" || echo "$v1" ; }

FILE=${1-data1}

pl " Input data file $FILE:"
cat $FILE

#         1        2     3          4   5           6     7         8          9
#2016-09-17 19:30:57 INFO: [D3B4AEB3] id: 4562079216, time: 2016-09-17 19:30:41,

pl " Results:"
while read line
do
  read d1 t1 j3 j4 j5 j6 j7 d8 t9 <<< $line
  reference=$( dateutils.dconv "$d1 $t1" )
  other=$( dateutils.dconv "$d8 $t9" )
  db " reference is :$reference:, other is :$other:"
  difference=$( dateutils.ddiff -f "%S%n" $reference $other )
  db " Difference in time is :$difference:"
  positive=$( abs "$difference" )
  db " absolute value of :$difference: is :$positive:"
  [ "$positive" -gt 10 ] && echo "$line"
done < $FILE

exit 0

$ ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 3.16.0-4-amd64, x86_64
Distribution        : Debian 8.4 (jessie) 
bash GNU bash 4.3.30
dateutils.dconv dconv 0.3.1
dateutils.ddiff ddiff 0.3.1

-----
 Input data file data1:
2016-09-17 19:30:57  INFO: [D3B4AEB3] id: 4562079216, time: 2016-09-17 19:30:41,
2016-09-17 12:02:26  INFO: [D3B4AEB3] id: 4562079193, time: 2016-09-17 12:02:25,

-----
 Results:
2016-09-17 19:30:57  INFO: [D3B4AEB3] id: 4562079216, time: 2016-09-17 19:30:41,

 Results:
 db,  reference is :2016-09-17T19:30:57:, other is :2016-09-17T19:30:41:
 db,  Difference in time is :-16:
 db,  absolute value of :-16: is :16:
2016-09-17 19:30:57  INFO: [D3B4AEB3] id: 4562079216, time: 2016-09-17 19:30:41,
 db,  reference is :2016-09-17T12:02:26:, other is :2016-09-17T12:02:25:
 db,  Difference in time is :-1:
 db,  absolute value of :-1: is :1: