#!/usr/local/bin/perl -w
use strict;
use warnings;
use DateTime::Format::Strptime;
my $Strp = new DateTime::Format::Strptime(pattern     => '%Y-%b-%d %T',);
my $infile = 'logfile-2008-01-11.log';
my $outfile = 'report-2008-01-11.txt';
my($fh_out, $fh);
my %lookup;
my $channel = 'two';
my $time_delta = 3600;  # seconds = 1 hour
open($fh_out, '>', $outfile) or die "Could not open outfile: $!";
open($fh, '<', $infile) or die "Could not open logfile: $!";
while (<$fh>) {
    next unless /$channel/;
#    $_ =~ m/^(.*) UTC.*refs = (\d+)$/;
#    my $dt = $Strp->parse_datetime("$1");
#    my $timestamp = $dt ->epoch();
#    my $refs = "$2";
my ($dt, $timestamp, $refs);
   if ( m/^(.*) UTC.*refs = (\d+)$/ ){
      # right here, just after the match, is the only
      # place it's safe to use $1 and $2 - tuck them away:
      my $t = $1;
      $refs = $2;
      $dt = $Strp->parse_datetime($t);
      $timestamp = $dt ->epoch();
   }
   else {
      warn "No match: $_  \n";
      next;
   }
    if ( defined($lookup{$refs}) && $lookup{$refs} + $time_delta <= $timestamp ) {
        print $fh_out "REFS $refs: occurrences at " . $lookup{$refs} . "and $timestamp \n";
        print "REFS $refs: occurrences at " . $lookup{$refs} . " and $timestamp \n";
    }
    $lookup{$refs} = $timestamp;
}
close $fh_out;
#close $fh;