#!/usr/bin/perl -wT
#
# ==========================================================================
#
# ZoneMinder Event Filter Script, $Date$, $Revision$
# Copyright (C) 2001-2008 Philip Coombes
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# ==========================================================================

=head1 NAME

zmfilter.pl - ZoneMinder tool to filter events

=head1 SYNOPSIS

zmfilter.pl [-f <filter name>,--filter=<filter name>] [--filter_id=<filter id>] | -v, --version

=head1 DESCRIPTION

This script continuously monitors the recorded events for the given
monitor and applies any filters which would delete and/or upload
matching events.

=head1 OPTIONS


-f{filter name}, --filter={filter name}  - The name of a specific filter to run
--filter_id={filter id}                  - The id of a specific filter to run
-v, --version                            - Print ZoneMinder version

=cut
use strict;
use bytes;

# ==========================================================================
#
# These are the elements you can edit to suit your installation
#
# ==========================================================================

use constant START_DELAY => 5; # How long to wait before starting

# ==========================================================================
#
# You shouldn't need to change anything from here downwards
#
# ==========================================================================

@EXTRA_PERL_LIB@
use ZoneMinder;
use DBI;
use POSIX;
use Time::HiRes qw/gettimeofday/;
#use Date::Manip;
use Getopt::Long;
use autouse 'Pod::Usage'=>qw(pod2usage);
use autouse 'Data::Dumper'=>qw(Dumper);

my $filter_name = '';
my $filter_id;
my $version = 0;
my $zm_terminate = 0;

GetOptions(
    'filter=s'      =>\$filter_name,
    'filter_id=s'   =>\$filter_id,
    'version'       =>\$version
    ) or pod2usage(-exitstatus => -1);

if ( $version ) {
  print ZoneMinder::Base::ZM_VERSION . "\n";
  exit(0);
}

require ZoneMinder::Event;
require ZoneMinder::Filter;

use constant EVENT_PATH => ($Config{ZM_DIR_EVENTS}=~m|/|)
  ? $Config{ZM_DIR_EVENTS}
  : ($Config{ZM_PATH_WEB}.'/'.$Config{ZM_DIR_EVENTS})
  ;

logInit();
sub HupHandler {
  Info("Received HUP, reloading");
  &ZoneMinder::Logger::logHupHandler();
}
sub TermHandler {
  Info("Received TERM, exiting");
  $zm_terminate = 1;
}
sub Term {
  exit( 0 );
}
$SIG{HUP} = \&HupHandler;
$SIG{TERM} = \&TermHandler;
$SIG{INT} = \&TermHandler;

if ( $Config{ZM_OPT_UPLOAD} ) {
# Comment these out if you don't have them and don't want to upload
# or don't want to use that format
  if ( $Config{ZM_UPLOAD_ARCH_FORMAT} eq 'zip' ) {
    require Archive::Zip;
    import Archive::Zip qw( :ERROR_CODES :CONSTANTS );
  } else {
    require Archive::Tar;
  }
  if ( $Config{ZM_UPLOAD_PROTOCOL} eq 'ftp' ) {
    require Net::FTP;
  } else {
    require Net::SFTP::Foreign;
  }
}

if ( $Config{ZM_OPT_EMAIL} ) {
  if ( $Config{ZM_NEW_MAIL_MODULES} ) {
    require MIME::Lite;
    require Net::SMTP;
  } else {
    require MIME::Entity;
  }
}

if ( $Config{ZM_OPT_MESSAGE} ) {
  if ( $Config{ZM_NEW_MAIL_MODULES} ) {
    require MIME::Lite;
    require Net::SMTP;
  } else {
    require MIME::Entity;
  }
}

$| = 1;

$ENV{PATH}  = '/bin:/usr/bin:/usr/local/bin';
$ENV{SHELL} = '/bin/sh' if exists $ENV{SHELL};
delete @ENV{qw(IFS CDPATH ENV BASH_ENV)};

my $delay = $Config{ZM_FILTER_EXECUTE_INTERVAL};
my $event_id = 0;

if ( ! EVENT_PATH ) {
  Error( "No event path defined. Config was $Config{ZM_DIR_EVENTS}\n" );
  die;
}

# In future, should not be neccessary wrt StorageAreas
chdir( EVENT_PATH );

# SHould not be neccessary... but nice to get a local var.  What if it fails?
my $dbh = zmDbConnect();

if ( $filter_name ) {
  Info( "Scanning for events using filter '$filter_name'\n" );
} elsif ( $filter_id ) {
  Info( "Scanning for events using filter id '$filter_id'\n" );
} else {
  Info( "Scanning for events using all filters\n" );
}

if ( ! ( $filter_name or $filter_id ) ) {
  Debug("Sleeping due to start delay: " . START_DELAY . ' seconds...' );
  sleep( START_DELAY );
}

my @filters;
my $last_action = 0;

while( ! $zm_terminate ) {
  my $now = time;
  if ( ($now - $last_action) > $Config{ZM_FILTER_RELOAD_DELAY} ) {
    Debug( "Reloading filters\n" );
    $last_action = $now;
    @filters = getFilters( { Name=>$filter_name, Id=>$filter_id } );
  }

  foreach my $filter ( @filters ) {
    last if $zm_terminate;
    if ( $$filter{Concurrent} and ! ( $filter_id or $filter_name ) ) {
      my ( $proc ) = $0 =~ /(\S+)/;
      my ( $id ) = $$filter{Id} =~ /(\d+)/;
      Debug("Running concurrent filter process $proc --filter_id $$filter{Id} => $id for $$filter{Name}");

      system( qq`$proc --filter "$$filter{Name}" &` );
    } else {
      checkFilter( $filter );
    }
  }

  last if $filter_name or $filter_id or $zm_terminate;

  Debug( "Sleeping for $delay seconds\n" );
  sleep( $delay );
}

sub getFilters {
  my $sql_filters = @_ ? shift : {};
  my @sql_values;

  my @filters;
  my $sql = 'SELECT * FROM Filters WHERE';
  if ( $$sql_filters{Name} ) {
    $sql .= ' Name = ? AND';
    push @sql_values, $$sql_filters{Name};
  } elsif ( $$sql_filters{Id} ) {
    $sql .= ' Id = ? AND';
    push @sql_values, $$sql_filters{Id};
  } else {
    $sql .= ' Background = 1 AND';
  }
  $sql .= '( AutoArchive = 1
    or AutoVideo = 1
    or AutoUpload = 1
    or AutoEmail = 1
    or AutoMessage = 1
    or AutoExecute = 1
    or AutoDelete = 1
    or UpdateDiskSpace = 1
    or AutoMove = 1
    ) ORDER BY Name';
  my $sth = $dbh->prepare_cached( $sql )
    or Fatal( "Unable to prepare '$sql': ".$dbh->errstr() );
  my $res = $sth->execute( @sql_values )
    or Fatal( "Unable to execute '$sql': ".$sth->errstr() );
FILTER: while( my $db_filter = $sth->fetchrow_hashref() ) {
    my $filter = new ZoneMinder::Filter( $$db_filter{Id}, $db_filter );
    Debug( "Found filter '$db_filter->{Name}'\n" );
    # The undef here is to make sure the Sql gets regenerated because the Filter object may be cached
    my $filter_sql = $filter->Sql(undef);

    if ( ! $filter_sql ) {
      Error( "Error parsing Sql. skipping filter '$db_filter->{Name}'\n" );
      next FILTER;
    }
    push @filters, $filter;
  }
  $sth->finish();
  if ( ! @filters ) {
    Warning("No filter found for $sql with values(@sql_values)");
  } else {
    Debug( "Got " . @filters . " filters" );
  }

  return @filters;
} # end sub getFilters

sub checkFilter {
  my $filter = shift;

  my @Events = $filter->Execute();
  Info(
      join(' ',
        'Checking filter', $filter->{Name},
        join( ', ', 

          ($filter->{AutoDelete}?'delete':()),
          ($filter->{AutoArchive}?'archive':()),
          ($filter->{AutoVideo}?'video':()),
          ($filter->{AutoUpload}?'upload':()),
          ($filter->{AutoEmail}?'email':()),
          ($filter->{AutoMessage}?'message':()),
          ($filter->{AutoExecute}?'execute':()),
          ($filter->{AutoMove}?'move':()),
          ($filter->{UpdateDiskSpace}?'update disk space':()),
          ),
        'returned' , scalar @Events , 'events',
        "\n",
        ) );

  foreach my $event ( @Events ) {
    last if $zm_terminate;
    Debug( "Checking event $event->{Id}" );
    my $delete_ok = !undef;
    $dbh->ping();
    if ( $filter->{AutoArchive} ) {
      Info( "Archiving event $event->{Id}" );
      # Do it individually to avoid locking up the table for new events
      my $sql = 'UPDATE Events SET Archived = 1 WHERE Id = ?';
      my $sth = $dbh->prepare_cached( $sql )
        or Fatal( "Unable toprepare '$sql': ".$dbh->errstr() );
      my $res = $sth->execute( $event->{Id} )
        or Error( "Unable toexecute '$sql': ".$sth->errstr() );
    }
    if ( $Config{ZM_OPT_FFMPEG} && $filter->{AutoVideo} ) {
      if ( !$event->{Videoed} ) {
        $delete_ok = undef if ( !generateVideo( $filter, $event ) );
      }
    }
    if ( $Config{ZM_OPT_EMAIL} && $filter->{AutoEmail} ) {
      if ( !$event->{Emailed} ) {
        $delete_ok = undef if ( !sendEmail( $filter, $event ) );
      }
    }
    if ( $Config{ZM_OPT_MESSAGE} && $filter->{AutoMessage} ) {
      if ( !$event->{Messaged} ) {
        $delete_ok = undef if ( !sendMessage( $filter, $event ) );
      }
    }
    if ( $Config{ZM_OPT_UPLOAD} && $filter->{AutoUpload} ) {
      if ( !$event->{Uploaded} ) {
        $delete_ok = undef if ( !uploadArchFile( $filter, $event ) );
      }
    }
    if ( $filter->{AutoExecute} ) {
      if ( !$event->{Executed} ) {
        $delete_ok = undef if ( !executeCommand( $filter, $event ) );
      }
    }
    if ( $filter->{AutoDelete} ) {
      if ( $delete_ok ) {
        my $Event = new ZoneMinder::Event( $$event{Id}, $event );
        $Event->delete();
      } else {
        Error( "Unable toto delete event $event->{Id} as previous operations failed\n" );
      }
    } # end if AutoDelete

    if ( $filter->{AutoMove} ) {
      my $Event = new ZoneMinder::Event( $$event{Id}, $event );
      my $NewStorage = new ZoneMinder::Storage( $filter->{AutoMoveTo} );
      $_ = $Event->MoveTo( $NewStorage );
      Error($_) if $_;
    }

    if ( $filter->{UpdateDiskSpace} ) {
      my $Event = new ZoneMinder::Event( $$event{Id}, $event );
      $ZoneMinder::Database::dbh->begin_work();
      $Event->lock_and_load();

      my $old_diskspace = $$Event{DiskSpace};
      if ( $old_diskspace != $Event->DiskSpace(undef) ) {
        $Event->save();
      }
      $ZoneMinder::Database::dbh->commit();
    } # end if UpdateDiskSpace
  } # end foreach event
}

sub generateVideo {
  my $filter = shift;
  my $event = shift;
  my $phone = shift;

  my $rate = $event->{DefaultRate}/100;
  my $scale = $event->{DefaultScale}/100;
  my $format;

  my @ffmpeg_formats = split( /\s+/, $Config{ZM_FFMPEG_FORMATS} );
  my $default_video_format;
  my $default_phone_format;
  foreach my $ffmpeg_format( @ffmpeg_formats ) {
    if ( $ffmpeg_format =~ /^(.+)\*\*$/ ) {
      $default_phone_format = $1;
    } elsif ( $ffmpeg_format =~ /^(.+)\*$/ ) {
      $default_video_format = $1;
    }
  }

  if ( $phone && $default_phone_format ) {
    $format = $default_phone_format;
  } elsif ( $default_video_format ) {
    $format = $default_video_format;
  } else {
    $format = $ffmpeg_formats[0];
  }

  my $command = join( '',
      $Config{ZM_PATH_BIN},
      '/zmvideo.pl -e ',
      $event->{Id},
      ' -r ',
      $rate,
      ' -s ',
      $scale,
      ' -f ',
      $format,
      );
  my $output = qx($command);
  chomp( $output );
  my $status = $? >> 8;
  if ( $status || logDebugging() ) {
    Debug( "Output: $output\n" );
  }
  if ( $status ) {
    Error( "Video generation '$command' failed with status: $status\n" );
    if ( wantarray() ) {
      return( undef, undef );
    }
    return( 0 );
  } else {
    my $sql = 'UPDATE Events SET Videoed = 1 WHERE Id = ?';
    my $sth = $dbh->prepare_cached( $sql )
      or Fatal( "Unable toprepare '$sql': ".$dbh->errstr() );
    my $res = $sth->execute( $event->{Id} )
      or Fatal( "Unable toexecute '$sql': ".$sth->errstr() );
    if ( wantarray() ) {
      return( $format, $output );
    }
  }
  return( 1 );
}

# Returns an image absolute path for given event and frame
# Optionally an analyse image path may be returned if an analyse image exists
# If neither capture nor analyse image exists it will try to extract a frame from .mp4 file if exists
# An empty string is returned if no one from methods above works
sub generateImage {
  my $event = shift;
  my $frame = shift;
  my $analyse = do { @_ ? shift : 0 }; # don't return analyse image by default

  my $capture_image_path = sprintf('%s/%0'.$Config{ZM_EVENT_IMAGE_DIGITS}.'d-capture.jpg', getEventPath($event), $frame->{FrameId});
  my $analyse_image_path = sprintf('%s/%0'.$Config{ZM_EVENT_IMAGE_DIGITS}.'d-analyse.jpg', getEventPath($event), $frame->{FrameId}) if $analyse;
  my $video_path =  sprintf('%s/%d-video.mp4', getEventPath($event), $event->{Id});
  my $image_path = '';

# check if the image file exists. If the file doesn't exist and we use H264 try to extract it from .mp4 video
  if ( $analyse && -r $analyse_image_path ) {
    $image_path = $analyse_image_path;
  } elsif ( -r $capture_image_path ) {
    $image_path = $capture_image_path;
  } elsif ( -e $video_path ) {
    if ( !system('ffmpeg -y -v 0 -i '.$video_path." -vf 'select=gte(n\\,".$frame->{FrameId}."),setpts=PTS-STARTPTS' -vframes 1 -f image2 ".$capture_image_path) ) {
      $image_path = $capture_image_path;
    }
  }
  return $image_path;
}


sub uploadArchFile {
  my $filter = shift;
  my $event = shift;

  if ( ! $Config{ZM_UPLOAD_HOST} ) {
    Error( 'Cannot upload archive as no upload host defined' );
    return( 0 );
  }

  my $archFile = $event->{MonitorName}.'-'.$event->{Id};
  my $archImagePath = getEventPath( $event )
    .'/'
    .(
        ( $Config{ZM_UPLOAD_ARCH_ANALYSE} )
        ? '{*analyse,*capture}'
        : '*capture'
     )
    .'.jpg'
    ;
  my @archImageFiles = glob($archImagePath);
  my $archLocPath;

  my $archError = 0;
  if ( $Config{ZM_UPLOAD_ARCH_FORMAT} eq 'zip' ) {
    $archFile .= '.zip';
    $archLocPath = $Config{ZM_UPLOAD_LOC_DIR}.'/'.$archFile;
    my $zip = Archive::Zip->new();
    Info( "Creating upload file '$archLocPath', ".int(@archImageFiles)." files\n" );

    my $status = &AZ_OK;
    foreach my $imageFile ( @archImageFiles ) {
      Debug( "Adding $imageFile\n" );
      my $member = $zip->addFile( $imageFile );
      if ( !$member ) {
        Error( "Unable toto add image file $imageFile to zip archive $archLocPath" );
        $archError = 1;
        last;
      }
      $member->desiredCompressionMethod( $Config{ZM_UPLOAD_ARCH_COMPRESS}
          ? &COMPRESSION_DEFLATED
          : &COMPRESSION_STORED
          );
    }
    if ( !$archError ) {
      $status = $zip->writeToFileNamed( $archLocPath );

      if ( $archError = ($status != &AZ_OK) ) {
        Error( "Zip error: $status\n " );
      }
    } else {
      Error( "Error adding images to zip archive $archLocPath, not writing" );
    }
  } elsif ( $Config{ZM_UPLOAD_ARCH_FORMAT} eq 'tar' ) {
    if ( $Config{ZM_UPLOAD_ARCH_COMPRESS} ) {
      $archFile .= '.tar.gz';
    } else {
      $archFile .= '.tar';
    }
    $archLocPath = $Config{ZM_UPLOAD_LOC_DIR}.'/'.$archFile;
    Info( "Creating upload file '$archLocPath', ".int(@archImageFiles)." files\n" );

    if ( $archError = !Archive::Tar->create_archive(
          $archLocPath,
          $Config{ZM_UPLOAD_ARCH_COMPRESS},
          @archImageFiles
          )
       ) {
      Error( 'Tar error: '.Archive::Tar->error()."\n " );
    }
  }

  if ( $archError ) {
    return( 0 );
  } else {
    if ( $Config{ZM_UPLOAD_PROTOCOL} eq 'ftp' ) {
      Info( 'Uploading to '.$Config{ZM_UPLOAD_HOST}." using FTP\n" );
      my $ftp = Net::FTP->new(
          $Config{ZM_UPLOAD_HOST},
          Timeout=>$Config{ZM_UPLOAD_TIMEOUT},
          Passive=>$Config{ZM_UPLOAD_FTP_PASSIVE},
          Debug=>$Config{ZM_UPLOAD_DEBUG}
          );
      if ( !$ftp ) {
        Error( "Unable tocreate FTP connection: $@" );
        return( 0 );
      }
      $ftp->login( $Config{ZM_UPLOAD_USER}, $Config{ZM_UPLOAD_PASS} )
        or Error( "FTP - Unable tologin" );
      $ftp->binary()
        or Error( "FTP - Unable togo binary" );
      $ftp->cwd( $Config{ZM_UPLOAD_REM_DIR} )
        or Error( "FTP - Unable tocwd" )
        if ( $Config{ZM_UPLOAD_REM_DIR} );
      $ftp->put( $archLocPath )
        or Error( "FTP - Unable toupload '$archLocPath'" );
      $ftp->quit()
        or Error( "FTP - Unable toquit" );
    } else {
      my $host = $Config{ZM_UPLOAD_HOST};
      $host .= ':'.$Config{ZM_UPLOAD_PORT}
      if $Config{ZM_UPLOAD_PORT};
      Info( 'Uploading to '.$host." using SFTP\n" );
      my %sftpOptions = ( host=>$Config{ZM_UPLOAD_HOST}, user=>$Config{ZM_UPLOAD_USER} );
      $sftpOptions{password} = $Config{ZM_UPLOAD_PASS}
      if $Config{ZM_UPLOAD_PASS};
      $sftpOptions{port} = $Config{ZM_UPLOAD_PORT}
      if $Config{ZM_UPLOAD_PORT};
      $sftpOptions{timeout} = $Config{ZM_UPLOAD_TIMEOUT}
      if $Config{ZM_UPLOAD_TIMEOUT};
      my @more_ssh_args;
      push @more_ssh_args, '-o'=>'StrictHostKeyChecking=no'
        if ! $Config{ZM_UPLOAD_STRICT};
      push @more_ssh_args, '-v'
        if $Config{ZM_UPLOAD_DEBUG};
      $sftpOptions{more} = [@more_ssh_args];
      my $sftp = Net::SFTP::Foreign->new( $Config{ZM_UPLOAD_HOST}, %sftpOptions );
      if ( $sftp->error ) {
        Error( "Unable tocreate SFTP connection: ".$sftp->error );
        return( 0 );
      }
      $sftp->setcwd( $Config{ZM_UPLOAD_REM_DIR} )
        or Error( "SFTP - Unable tosetcwd: ".$sftp->error )
        if $Config{ZM_UPLOAD_REM_DIR};
      $sftp->put( $archLocPath, $archFile )
        or Error( "SFTP - Unable toupload '$archLocPath': ".$sftp->error );
    }
    unlink( $archLocPath );
    my $sql = 'UPDATE Events SET Uploaded = 1 WHERE Id = ?';
    my $sth = $dbh->prepare_cached( $sql )
      or Fatal( "Unable toprepare '$sql': ".$dbh->errstr() );
    my $res = $sth->execute( $event->{Id} )
      or Fatal( "Unable toexecute '$sql': ".$sth->errstr() );
  }
  return( 1 );
}

sub substituteTags {
  my $text = shift;
  my $filter = shift;
  my $event = shift;
  my $attachments_ref = shift;

# First we'd better check what we need to get
# We have a filter and an event, do we need any more
# monitor information?
  my $need_monitor = $text =~ /%(?:MET|MEH|MED|MEW|MEN|MEA)%/;

  my $monitor = {};
  if ( $need_monitor ) {
    my $db_now = strftime( '%Y-%m-%d %H:%M:%S', localtime() );
    my $sql = "SELECT
      M.Id,
      count(E.Id) as EventCount,
      count(if(E.Archived,1,NULL))
        as ArchEventCount,
      count(if(E.StartTime>'$db_now' - INTERVAL 1 HOUR && E.Archived = 0,1,NULL))
        as HourEventCount,
      count(if(E.StartTime>'$db_now' - INTERVAL 1 DAY && E.Archived = 0,1,NULL))
        as DayEventCount,
      count(if(E.StartTime>'$db_now' - INTERVAL 7 DAY && E.Archived = 0,1,NULL))
        as WeekEventCount,
      count(if(E.StartTime>'$db_now' - INTERVAL 1 MONTH && E.Archived = 0,1,NULL))
        as MonthEventCount
        FROM Monitors as M LEFT JOIN Events as E on E.MonitorId = M.Id
        WHERE MonitorId = ?
        GROUP BY E.MonitorId
        ORDER BY Id"
        ;
    my $sth = $dbh->prepare_cached( $sql )
      or Fatal( "Unable toprepare '$sql': ".$dbh->errstr() );
    my $res = $sth->execute( $event->{MonitorId} )
      or Fatal( "Unable toexecute '$sql': ".$sth->errstr() );
    $monitor = $sth->fetchrow_hashref();
    $sth->finish();
    return() if ( !$monitor );
  }

# Do we need the image information too?
  my $need_images = $text =~ /%(?:EPI1|EPIM|EI1|EIM|EI1A|EIMA)%/;
  my $first_alarm_frame;
  my $max_alarm_frame;
  my $max_alarm_score = 0;
  if ( $need_images ) {
    my $sql = "SELECT * FROM Frames
      WHERE EventId = ? AND Type = 'Alarm'
      ORDER BY FrameId"
      ;
    my $sth = $dbh->prepare_cached( $sql )
      or Fatal( "Unable toprepare '$sql': ".$dbh->errstr() );
    my $res = $sth->execute( $event->{Id} )
      or Fatal( "Unable toexecute '$sql': ".$sth->errstr() );
    while( my $frame = $sth->fetchrow_hashref() ) {
      if ( !$first_alarm_frame ) {
        $first_alarm_frame = $frame;
      }
      if ( $frame->{Score} > $max_alarm_score ) {
        $max_alarm_frame = $frame;
        $max_alarm_score = $frame->{Score};
      }
    }
    $sth->finish();
  }

  my $url = $Config{ZM_URL};
  $text =~ s/%ZP%/$url/g;
  $text =~ s/%MN%/$event->{MonitorName}/g;
  $text =~ s/%MET%/$monitor->{EventCount}/g;
  $text =~ s/%MEH%/$monitor->{HourEventCount}/g;
  $text =~ s/%MED%/$monitor->{DayEventCount}/g;
  $text =~ s/%MEW%/$monitor->{WeekEventCount}/g;
  $text =~ s/%MEM%/$monitor->{MonthEventCount}/g;
  $text =~ s/%MEA%/$monitor->{ArchEventCount}/g;
  $text =~ s/%MP%/$url?view=watch&mid=$event->{MonitorId}/g;
  $text =~ s/%MPS%/$url?view=watchfeed&mid=$event->{MonitorId}&mode=stream/g;
  $text =~ s/%MPI%/$url?view=watchfeed&mid=$event->{MonitorId}&mode=still/g;
  $text =~ s/%EP%/$url?view=event&mid=$event->{MonitorId}&eid=$event->{Id}/g;
  $text =~ s/%EPS%/$url?view=event&mode=stream&mid=$event->{MonitorId}&eid=$event->{Id}/g;
  $text =~ s/%EPI%/$url?view=event&mode=still&mid=$event->{MonitorId}&eid=$event->{Id}/g;
  $text =~ s/%EI%/$event->{Id}/g;
  $text =~ s/%EN%/$event->{Name}/g;
  $text =~ s/%EC%/$event->{Cause}/g;
  $text =~ s/%ED%/$event->{Notes}/g;
  $text =~ s/%ET%/$event->{StartTime}/g;
  $text =~ s/%EL%/$event->{Length}/g;
  $text =~ s/%EF%/$event->{Frames}/g;
  $text =~ s/%EFA%/$event->{AlarmFrames}/g;
  $text =~ s/%EST%/$event->{TotScore}/g;
  $text =~ s/%ESA%/$event->{AvgScore}/g;
  $text =~ s/%ESM%/$event->{MaxScore}/g;

  if ( $first_alarm_frame ) {
    $text =~ s/%EPI1%/$url?view=frame&mid=$event->{MonitorId}&eid=$event->{Id}&fid=$first_alarm_frame->{FrameId}/g;
    $text =~ s/%EPIM%/$url?view=frame&mid=$event->{MonitorId}&eid=$event->{Id}&fid=$max_alarm_frame->{FrameId}/g;
    if ( $attachments_ref && $text =~ s/%EI1%//g ) {
      my $path = generateImage( $event, $first_alarm_frame );
      if ( -e $path ) {
        push( @$attachments_ref, { type=>'image/jpeg', path=>$path } );
      }
    }

    if ( $attachments_ref && $text =~ s/%EIM%//g ) {
  # Don't attach the same image twice
      if ( !@$attachments_ref
          || ($first_alarm_frame->{FrameId} != $max_alarm_frame->{FrameId} )
         ) {
        my $path = generateImage( $event, $max_alarm_frame );
        if ( -e $path ) {
          push( @$attachments_ref, { type=>'image/jpeg', path=>$path } );
        }
      }
    }
    if ( $attachments_ref && $text =~ s/%EI1A%//g ) {
      my $path = generateImage( $event, $first_alarm_frame, 'analyse' );
      if ( -e $path ) {
        push( @$attachments_ref, { type=>'image/jpeg', path=>$path } );
      }
    }
    if ( $attachments_ref && $text =~ s/%EIMA%//g ) {
  # Don't attach the same image twice
      if ( !@$attachments_ref
          || ($first_alarm_frame->{FrameId} != $max_alarm_frame->{FrameId} )
         ) {
        my $path = generateImage( $event, $max_alarm_frame, 'analyse');
        if ( -e $path ) {
          push( @$attachments_ref, { type=>'image/jpeg', path=>$path } );
        }
      }
    }
  } # end if $first_alarm_frame

  if ( $attachments_ref && $Config{ZM_OPT_FFMPEG} ) {
    if ( $text =~ s/%EV%//g ) {
      my ( $format, $path ) = generateVideo( $filter, $event );
      if ( !$format ) {
        return( undef );
      }
      push( @$attachments_ref, { type=>"video/$format", path=>$path } );
    }
    if ( $text =~ s/%EVM%//g ) {
      my ( $format, $path ) = generateVideo( $filter, $event, 1 );
      if ( !$format ) {
        return( undef );
      }
      push( @$attachments_ref, { type=>"video/$format", path=>$path } );
    }
  }
  $text =~ s/%FN%/$filter->{Name}/g;
  ( my $filter_name = $filter->{Name} ) =~ s/ /+/g;
  $text =~ s/%FP%/$url?view=filter&mid=$event->{MonitorId}&filter_name=$filter_name/g;

  return( $text );
} # end subsitituteTags

sub sendEmail {
  my $filter = shift;
  my $event = shift;

  if ( ! $Config{ZM_FROM_EMAIL} ) {
    Error( "No 'from' email address defined, not sending email" );
    return( 0 );
  }
  if ( ! $Config{ZM_EMAIL_ADDRESS} ) {
    Error( 'No email address defined, not sending email' );
    return( 0 );
  }

  Info( "Creating notification email\n" );

  my $subject = substituteTags( $Config{ZM_EMAIL_SUBJECT}, $filter, $event );
  return( 0 ) if ( !$subject );
  my @attachments;
  my $body = substituteTags( $Config{ZM_EMAIL_BODY}, $filter, $event, \@attachments );
  return( 0 ) if ( !$body );

  Info( "Sending notification email '$subject'\n" );

  eval {
    if ( $Config{ZM_NEW_MAIL_MODULES} ) {
### Create the multipart container
      my $mail = MIME::Lite->new (
          From => $Config{ZM_FROM_EMAIL},
          To => $Config{ZM_EMAIL_ADDRESS},
          Subject => $subject,
          Type => 'multipart/mixed'
          );
### Add the text message part
      $mail->attach (
          Type => 'TEXT',
          Data => $body
          );
### Add the attachments
      foreach my $attachment ( @attachments ) {
        Info( "Attaching '$attachment->{path}\n" );
        $mail->attach(
            Path => $attachment->{path},
            Type => $attachment->{type},
            Disposition => 'attachment'
            );
      }
### Send the Message
      if ( $Config{ZM_SSMTP_MAIL} ) {
        my $ssmtp_location = $Config{ZM_SSMTP_PATH};
        if ( !$ssmtp_location ) {
          if ( logDebugging() ) {
            Debug( "which ssmtp: $ssmtp_location - set ssmtp path in options to suppress this message\n" );
          }
          $ssmtp_location = qx('which ssmtp');
        }
        if ( !$ssmtp_location ) {
          Debug( "Unable tofind ssmtp, trying MIME::Lite->send" );
          MIME::Lite->send( 'smtp', $Config{ZM_EMAIL_HOST}, Timeout=>60 );
          $mail->send();
        } else {
### Send using SSMTP
          $mail->send( 'sendmail', $ssmtp_location, $Config{ZM_EMAIL_ADDRESS} );
        }
      } else {
        MIME::Lite->send( 'smtp', $Config{ZM_EMAIL_HOST}, Timeout=>60 );
        $mail->send();
      }
    } else {
      my $mail = MIME::Entity->build(
          From => $Config{ZM_FROM_EMAIL},
          To => $Config{ZM_EMAIL_ADDRESS},
          Subject => $subject,
          Type => (($body=~/<html>/)?'text/html':'text/plain'),
          Data => $body
          );

      foreach my $attachment ( @attachments ) {
        Info( "Attaching '$attachment->{path}\n" );
        $mail->attach(
            Path => $attachment->{path},
            Type => $attachment->{type},
            Encoding => 'base64'
            );
      }
      $mail->smtpsend( Host => $Config{ZM_EMAIL_HOST}, MailFrom => $Config{ZM_FROM_EMAIL} );
    }
  };
  if ( $@ ) {
    Error( "Unable tosend email: $@" );
    return( 0 );
  } else {
    Info( "Notification email sent\n" );
  }
  my $sql = 'update Events set Emailed = 1 where Id = ?';
  my $sth = $dbh->prepare_cached( $sql )
    or Fatal( "Unable toprepare '$sql': ".$dbh->errstr() );
  my $res = $sth->execute( $event->{Id} )
    or Fatal( "Unable toexecute '$sql': ".$sth->errstr() );

  return( 1 );
}

sub sendMessage {
  my $filter = shift;
  my $event = shift;

  if ( ! $Config{ZM_FROM_EMAIL} ) {
    Error( "No 'from' email address defined, not sending message" );
    return( 0 );
  }
  if ( ! $Config{ZM_MESSAGE_ADDRESS} ) {
    Error( 'No message address defined, not sending message' );
    return( 0 );
  }

  Info( "Creating notification message\n" );

  my $subject = substituteTags( $Config{ZM_MESSAGE_SUBJECT}, $filter, $event );
  return( 0 ) if ( !$subject );
  my @attachments;
  my $body = substituteTags( $Config{ZM_MESSAGE_BODY}, $filter, $event, \@attachments );
  return( 0 ) if ( !$body );

  Info( "Sending notification message '$subject'\n" );

  eval {
    if ( $Config{ZM_NEW_MAIL_MODULES} ) {
### Create the multipart container
      my $mail = MIME::Lite->new (
          From => $Config{ZM_FROM_EMAIL},
          To => $Config{ZM_MESSAGE_ADDRESS},
          Subject => $subject,
          Type => 'multipart/mixed'
          );
### Add the text message part
      $mail->attach (
          Type => 'TEXT',
          Data => $body
          );
### Add the attachments
      foreach my $attachment ( @attachments ) {
        Info( "Attaching '$attachment->{path}\n" );
        $mail->attach(
            Path => $attachment->{path},
            Type => $attachment->{type},
            Disposition => 'attachment'
            );
      }
### Send the Message
      if ( $Config{ZM_SSMTP_MAIL} ) {
        my $ssmtp_location = $Config{ZM_SSMTP_PATH};
        if ( !$ssmtp_location ) {
          if ( logDebugging() ) {
            Debug( "which ssmtp: $ssmtp_location - set ssmtp path in options to suppress this message\n" );
          }
          $ssmtp_location = qx('which ssmtp');
        }
        if ( !$ssmtp_location ) {
          Debug( 'Unable tofind ssmtp, trying MIME::Lite->send' );
          MIME::Lite->send( 'smtp', $Config{ZM_EMAIL_HOST}, Timeout=>60 );
          $mail->send();
        } else {
### Send using SSMTP
          $mail->send( 'sendmail', $ssmtp_location, $Config{ZM_MESSAGE_ADDRESS} );
        }
      } else {
        MIME::Lite->send( 'smtp', $Config{ZM_EMAIL_HOST}, Timeout=>60 );
        $mail->send();
      }
    } else {
      my $mail = MIME::Entity->build(
          From => $Config{ZM_FROM_EMAIL},
          To => $Config{ZM_MESSAGE_ADDRESS},
          Subject => $subject,
          Type => (($body=~/<html>/)?'text/html':'text/plain'),
          Data => $body
          );

      foreach my $attachment ( @attachments ) {
        Info( "Attaching '$attachment->{path}\n" );
        $mail->attach(
            Path => $attachment->{path},
            Type => $attachment->{type},
            Encoding => 'base64'
            );
      }
      $mail->smtpsend( Host => $Config{ZM_EMAIL_HOST},
          MailFrom => $Config{ZM_FROM_EMAIL}
          );
    }
  };
  if ( $@ ) {
    Error( "Unable tosend email: $@" );
    return( 0 );
  } else {
    Info( "Notification message sent\n" );
  }
  my $sql = 'update Events set Messaged = 1 where Id = ?';
  my $sth = $dbh->prepare_cached( $sql )
    or Fatal( "Unable toprepare '$sql': ".$dbh->errstr() );
  my $res = $sth->execute( $event->{Id} )
    or Fatal( "Unable toexecute '$sql': ".$sth->errstr() );

  return( 1 );
}

sub executeCommand {
  my $filter = shift;
  my $event = shift;

  my $event_path = getEventPath( $event );

  my $command = $filter->{AutoExecuteCmd};
  $command .= " $event_path";
  $command = substituteTags( $command, $filter, $event );

  Info( "Executing '$command'\n" );
  my $output = qx($command);
  my $status = $? >> 8;
  if ( $status || logDebugging() ) {
    chomp( $output );
    Debug( "Output: $output\n" );
  }
  if ( $status ) {
    Error( "Command '$command' exited with status: $status\n" );
    return( 0 );
  } else {
    my $sql = 'update Events set Executed = 1 where Id = ?';
    my $sth = $dbh->prepare_cached( $sql )
      or Fatal( "Unable toprepare '$sql': ".$dbh->errstr() );
    my $res = $sth->execute( $event->{Id} )
      or Fatal( "Unable toexecute '$sql': ".$sth->errstr() );
  }
  return( 1 );
}