#!/usr/local/bin/perl
#This script is for checking the modification time of files under /config directory.
use File::Find;
use File::stat qw(:FIELDS);
use HTTP::Request;
use LWP::UserAgent;

%fileModTimes;
$serverPath = "";
$filesModified = "";
%broadcastingModTimes;
$broadcastingModified = "";

open(IN, "/config/Status.conf") or file_not_found();
while (<IN>)
{
  if (/ServerPath/)
  {
     s/ServerPath.*=(.*)/$1/;
     $serverPath = $1;
  }

}
close IN;

find(\&updateFileModTimes, "/config");
find(\&updateBroadCastingModTimes,"/config/Notify.conf");

#Check all files under /config directory
sub updateFileModTimes
{
  if ( -f "$File::Find::name" && "$File::Find::name" =~ /.*\.txt/i)
  {
     if ($fileModTimes{$File::Find::name})
     {
        stat($File::Find::name) or die "Couldn't find $File::Find::name";
        if ( $fileModTimes{$File::Find::name} eq $st_mtime )
        {
           #do nothing
        }
        else
        {
           $fileModTimes{$File::Find::name} = $st_mtime;
           $filesModified = "true";
        }
     }
     else
     {
        stat($File::Find::name) or die "Couldn't find $File::Find::name";
        $fileModTimes{$File::Find::name} = $st_mtime;
     }
  }
}

#Check Notify.conf file for broadcating message under /config
sub updateBroadCastingModTimes
{
  if ( -f "$File::Find::name" && "$File::Find::name" eq "/config/Notify.conf")
  {
     if ($broadcastingModTimes{$File::Find::name})
     {
        stat($File::Find::name) or die "Couldn't find $File::Find::name";
        if ( $broadcastingModTimes{$File::Find::name} eq $st_mtime )
        {
           #do nothing
        }
        else
        {
           $broadcastingModTimes{$File::Find::name} = $st_mtime;
           $broadcastingModified = "true";
        }
     }
     else
     {
        stat($File::Find::name) or die "Couldn't find $File::Find::name";
        $broadcastingModTimes{$File::Find::name} = $st_mtime;
     }
  }
}


while ( true )
{
  sleep 3;
  $url = $serverPath."\/appl?method=Updatefile";
  $ua = LWP::UserAgent->new;
  $request = HTTP::Request->new(GET => $url);
  $response =  $ua->request($request);
  #Check all files under configfiles directory
  find(\&updateFileModTimes, "/config");
  if ($filesModified eq "true" )
  {
    #A sleep of 10 secs is allowed here to ensure that all the files
    #are modified correctly.
    sleep 10;
    find(\&updateFileModTimes, "/config");
    #send a request to the servlet
    $url = $serverPath."\/appl?method=Updatefile";
    $ua = LWP::UserAgent->new;
    $request = HTTP::Request->new(GET => $url);
    $response =  $ua->request($request);
    $filesModified = "";
  }
  #check Notify.conf file for broadcasting message under configfiles directory
  find(\&updateBroadCastingModTimes, "/config/Notify.conf");
  if ($broadcastingModified eq "true" )
  {
    #A sleep of 10 secs is allowed here to ensure that Notify.conf file
    #is modified correctly.
    sleep 10;
    find(\&updateBroadCastingModTimes, "/config/Notify.conf");
    #send a request to the servlet
    $url = $serverPath."\/appl?method=Updatefile&NotificationMessage=broadcast";
    $ua = LWP::UserAgent->new;
    $request = HTTP::Request->new(GET => $url);
    $response =  $ua->request($request);
    $broadcastingModified = "";
  }

}