#!@PERL_EXECUTABLE@ -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.
#
# ==========================================================================

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);
use File::Path qw(make_path);

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

GetOptions(
  daemon        =>\$daemon,
  '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($filter_id?(id=>'zmfilter_'.$filter_id):());

sub HupHandler {
  # This idea at this time is to just exit, freeing up the memory. 
  # zmfilter.pl will be respawned by zmdc.
  TermHandler();
  return;

  Info('Received HUP, reloading');
  ZoneMinder::Object::init_cache();
  &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 $event_id = 0;

if (!EVENT_PATH) {
  Error('No event path defined. Config was '.$Config{ZM_DIR_EVENTS});
  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();
$dbh->do('SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED');

if ( $filter_name ) {
  Info("Scanning for events using filter '$filter_name'");
} elsif ( defined($filter_id) ) {
  if ( $filter_id ) {
    Info("Scanning for events using filter id '$filter_id'");
  } else {
    Fatal('No filter_id specified');
  }
} else {
  Info('Scanning for events using all filters');
}

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 $delay = $Config{ZM_FILTER_EXECUTE_INTERVAL};
  my $now = time;
  if (($now - $last_action) > $Config{ZM_FILTER_RELOAD_DELAY}) {
    Debug('Reloading filters');
    $last_action = $now;
    @filters = getFilters({ Name=>$filter_name, Id=>$filter_id });
  }

  foreach my $filter (@filters) {
    last if $zm_terminate;

    my $elapsed = ($now - $$filter{last_ran});
    if ($$filter{last_ran} and ($elapsed < $$filter{ExecuteInterval})) {
      my $filter_delay = $$filter{ExecuteInterval} - ($now - $$filter{last_ran});
      $delay = $filter_delay if $filter_delay < $delay;
      Debug("Setting delay to $delay because ExecuteInterval=$$filter{ExecuteInterval} and $elapsed have elapsed");
      next;
    }

    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_id $id &`);
    } else {
      checkFilter($filter);
      $$filter{last_ran} = $now;
    }
  } # end foreach filter

  last if (!$daemon and ($filter_name or $filter_id)) or $zm_terminate;

  Debug("Sleeping for $delay seconds");
  sleep($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 `AutoUnarchive` = 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
    or `AutoCopy` = 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': ".$dbh->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}'");
    # 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}'");
      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 $in_transaction = ZoneMinder::Database::start_transaction($dbh) if $$filter{LockRows}; 
  my @Events = $filter->Execute();
  Debug(
      join(' ',
        'Checking filter', $filter->{Name},
        join(', ', 
          ($filter->{AutoDelete}?'delete':()),
          ($filter->{AutoArchive}?'archive':()),
          ($filter->{AutoUnarchive}?'unarchive':()),
          ($filter->{AutoVideo}?'video':()),
          ($filter->{AutoUpload}?'upload':()),
          ($filter->{AutoEmail}?'email':()),
          ($filter->{AutoMessage}?'message':()),
          ($filter->{AutoExecute}?'execute':()),
          ($filter->{AutoMove}?'move':()),
          ($filter->{AutoCopy}?'copy':()),
          ($filter->{UpdateDiskSpace}?'update disk space':()),
          ),
        'returned' , scalar @Events , 'events',
        "\n",
        ) );

  foreach my $event ( @Events ) {
    last if $zm_terminate;
    my $Event = new ZoneMinder::Event($$event{Id}, $event);

    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 to prepare '$sql': ".$dbh->errstr());
      my $res = $sth->execute($Event->{Id})
        or Error("Unable to execute '$sql': ".$dbh->errstr());
    }
    if ( $filter->{AutoUnarchive} ) {
      Info("Unarchiving event $Event->{Id}");
      # Do it individually to avoid locking up the table for new events
      my $sql = 'UPDATE `Events` SET `Archived` = 0 WHERE `Id` = ?';
      my $sth = $dbh->prepare_cached($sql)
        or Fatal("Unable to prepare '$sql': ".$dbh->errstr());
      my $res = $sth->execute($Event->{Id})
        or Error("Unable to execute '$sql': ".$dbh->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 ) {
        $Event->delete();
      } else {
        Error("Unable to delete event $Event->{Id} as previous operations failed");
      }
    } # end if AutoDelete

    if ( $filter->{AutoMove} ) {
      my $NewStorage = new ZoneMinder::Storage($filter->{AutoMoveTo});
      Info("Moving event $Event->{Id} to datastore $filter->{AutoMoveTo}");
      $_ = $Event->MoveTo($NewStorage);
      Error($_) if $_;
    }
    if ( $filter->{AutoCopy} ) {
      # Copy To is different from MoveTo in that it JUST copies the files
      # So we still need to update the Event object with the new SecondaryStorageId
      my $NewStorage = ZoneMinder::Storage->find_one(Id=>$filter->{AutoCopyTo});
      if ( $NewStorage ) {
        Info("Copying event $Event->{Id} to datastore $filter->{AutoCopyTo}");
        $_ = $Event->CopyTo($NewStorage);
        if ( $_ ) {
          $ZoneMinder::Database::dbh->commit();
          Error($_);
        } else {
          $Event->save({SecondaryStorageId=>$$NewStorage{Id}});
          $ZoneMinder::Database::dbh->commit();
        }
      } else {
        Error("No storage area found for copy to operation.  AutoCopyTo was $$filter{AutoCopyTo}");
      }
    } # end if AutoCopy

    if ( $filter->{UpdateDiskSpace} ) {
      my $old_diskspace = $$Event{DiskSpace};
			my $new_diskspace = $Event->DiskSpace(undef);

      if (
					( (!defined $old_diskspace) and defined $new_diskspace)
					or
					( (defined $old_diskspace) and (defined $new_diskspace) and ( $old_diskspace != $Event->DiskSpace(undef) ) )
					) {
        $Event->save();
      }
    } # end if UpdateDiskSpace
  } # end foreach event
  ZoneMinder::Database::end_transaction($dbh, $in_transaction) if $$filter{LockRows}; 
} # end sub checkFilter

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

  my $Monitor = $Event->Monitor();
  my $rate = $$Monitor{DefaultRate}/100;
  my $scale = $$Monitor{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");
  }
  if ( $status ) {
    Error("Video generation '$command' failed with status: $status");
    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 to prepare '$sql': ".$dbh->errstr());
    my $res = $sth->execute($Event->{Id})
      or Fatal("Unable to execute '$sql': ".$dbh->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 = @_ ? shift : 0; # don't return analyse image by default

  my $event_path = $Event->Path();
  my $capture_image_path = sprintf('%s/%0'.$Config{ZM_EVENT_IMAGE_DIGITS}.'d-capture.jpg', $event_path, $frame->{FrameId});
  my $analyse_image_path = sprintf('%s/%0'.$Config{ZM_EVENT_IMAGE_DIGITS}.'d-analyse.jpg', $event_path, $frame->{FrameId}) if $analyse;
  my $video_path =  sprintf('%s/%d-video.mp4', $event_path, $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 ( -r $video_path ) {
    my $command ="ffmpeg -nostdin -ss $$frame{Delta} -i '$video_path' -frames:v 1 '$capture_image_path'";
    #$command = "ffmpeg -y -v 0 -i $video_path -vf 'select=gte(n\\,$$frame{FrameId}),setpts=PTS-STARTPTS' -vframes 1 -f image2 $capture_image_path";
    my $output = qx($command);
    chomp($output);
    my $status = $? >> 8;
    if ( $status || logDebugging() ) {
      Debug("Output: $output");
    }
    if ( $status ) {
      Error("Failed $command status $status");
    } else {
      $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 );
  }

  # Try to make the path to the upload folder if it doesn't already exist
  make_path( $Config{ZM_UPLOAD_LOC_DIR} );

  # Complain if the upload folder is still not writable
  if ( ! -w $Config{ZM_UPLOAD_LOC_DIR} ) {
    Error("Upload folder either does not exist or is not writable: $Config{ZM_UPLOAD_LOC_DIR}");
    return(0);
  }

  my $archFile = $Event->Monitor()->Name().'-'.$Event->{Id};
  my $archImagePath = $Event->Path()
    .'/'
    .(
        ( $Config{ZM_UPLOAD_ARCH_ANALYSE} )
        ? '{*analyse.jpg,*capture.jpg,snapshot.jpg,*.mp4}'
        : '{*capture.jpg,snapshot.jpg,*.mp4}'
     )
    ;
  my @archImageFiles = glob($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');

    my $status = &AZ_OK;
    foreach my $imageFile ( @archImageFiles ) {
      if (! -e $imageFile) {
        Debug("Not adding $imageFile because it doesn't exist");
        next;
      }
      Debug("Adding $imageFile");
      my $member = $zip->addFile($imageFile);
      if ( !$member ) {
        Error("Unable to 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");
      }
    } 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');

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

  if ( $archError ) {
    return 0;
  } else {
    if ( $Config{ZM_UPLOAD_PROTOCOL} eq 'ftp' ) {
      Info('Uploading to '.$Config{ZM_UPLOAD_HOST}.' using FTP');
      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 to create FTP connection: $@");
        return 0;
      }
      $ftp->login($Config{ZM_UPLOAD_USER}, $Config{ZM_UPLOAD_PASS})
        or Error("FTP - Unable to login");
      $ftp->binary()
        or Error("FTP - Unable to go binary");
      $ftp->cwd($Config{ZM_UPLOAD_REM_DIR})
        or Error("FTP - Unable to cwd")
        if ( $Config{ZM_UPLOAD_REM_DIR} );
      $ftp->put( $archLocPath )
        or Error("FTP - Unable to upload '$archLocPath'");
      $ftp->quit()
        or Error("FTP - Unable to quit");
    } else {
      my $host = $Config{ZM_UPLOAD_HOST};
      $host .= ':'.$Config{ZM_UPLOAD_PORT} if $Config{ZM_UPLOAD_PORT};
      Info('Uploading to '.$host.' using SFTP');
      my %sftpOptions = (
          host=>$Config{ZM_UPLOAD_HOST},
          user=>$Config{ZM_UPLOAD_USER},
          ($Config{ZM_UPLOAD_PASS} ? (password=>$Config{ZM_UPLOAD_PASS}) : ()),
          ($Config{ZM_UPLOAD_PORT} ? (port=>$Config{ZM_UPLOAD_PORT}) : ()),
          ($Config{ZM_UPLOAD_TIMEOUT} ? (timeout=>$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 ( $sftp->error ) {
        Error("Unable to create SFTP connection: ".$sftp->error);
        return 0;
      }
      $sftp->setcwd($Config{ZM_UPLOAD_REM_DIR})
        or Error("SFTP - Unable to setcwd: ".$sftp->error)
        if $Config{ZM_UPLOAD_REM_DIR};
      $sftp->put($archLocPath, $archFile)
        or Error("SFTP - Unable to upload '$archLocPath': ".$sftp->error);
    }
    unlink($archLocPath);
    my $sql = 'UPDATE `Events` SET `Uploaded` = 1 WHERE `Id` = ?';
    my $sth = $dbh->prepare_cached($sql)
      or Fatal("Unable to prepare '$sql': ".$dbh->errstr());
    my $res = $sth->execute($Event->{Id})
      or Fatal("Unable to execute '$sql': ".$dbh->errstr());
  }
  return 1;
} # end sub uploadArchFile

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 =~ /%(?:MN|MET|MEH|MED|MEW|MEN|MEA)%/;
  my $need_summary = $text =~ /%(?:MET|MEH|MED|MEW|MEN|MEA)%/;

  my $Monitor = $Event->Monitor() if $need_monitor;
  my $Summary = $Monitor->Event_Summary() if $need_summary;

# Do we need the image information too?
  my $need_images = $text =~ /%(?:EPI1|EPIM|EI1|EIM|EI1A|EIMA|EIMOD|EIMODG)%/;
  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`=? ORDER BY `FrameId`';
    my $sth = $dbh->prepare_cached($sql)
      or Fatal("Unable to prepare '$sql': ".$dbh->errstr());
    my $res = $sth->execute($Event->{Id},'Alarm')
      or Fatal("Unable to execute '$sql': ".$dbh->errstr());
    my $rows = 0;
    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};
      }
      $rows ++;
    }
    Debug("Frames: rows: $rows first alarm frame: $first_alarm_frame max_alarm_frame: $max_alarm_frame, score: $max_alarm_score");
    $sth->finish();
  }

  my $url = $Config{ZM_URL};
  $text =~ s/%ZP%/$url/g;
  $text =~ s/%MN%/$Monitor->{Name}/g;
  $text =~ s/%MET%/$Summary->{TotalEvents}/g;
  $text =~ s/%MEH%/$Summary->{HourEvents}/g;
  $text =~ s/%MED%/$Summary->{DayEvents}/g;
  $text =~ s/%MEW%/$Summary->{WeekEvents}/g;
  $text =~ s/%MEM%/$Summary->{MonthEvents}/g;
  $text =~ s/%MEA%/$Summary->{ArchivedEvents}/g;
  $text =~ s/%MP%/$url?view=watch&mid=$Event->{MonitorId}/g;
  $text =~ s/%MPS%/$url?view=watch&mid=$Event->{MonitorId}&mode=stream/g;
  $text =~ s/%MPI%/$url?view=watch&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->{StartDateTime}/g;
  $text =~ s/%EVF%/$$Event{DefaultVideo}/g; # Event video filename
  $text =~ s/%EL%/$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 ) {
    $text =~ s/%EPF1%/$url?view=frame&mid=$Event->{MonitorId}&eid=$Event->{Id}&fid=$first_alarm_frame->{FrameId}/g;
    $text =~ s/%EPFM%/$url?view=frame&mid=$Event->{MonitorId}&eid=$Event->{Id}&fid=$max_alarm_frame->{FrameId}/g;
    $text =~ s/%EPI1%/$url?view=image&mid=$Event->{MonitorId}&eid=$Event->{Id}&fid=$first_alarm_frame->{FrameId}/g;
    $text =~ s/%EPIM%/$url?view=image&mid=$Event->{MonitorId}&eid=$Event->{Id}&fid=$max_alarm_frame->{FrameId}/g;
    $text =~ s/%EPFMOD%/$url?view=frame&mid=$Event->{MonitorId}&eid=$Event->{Id}&fid=objdetect/g;
    $text =~ s/%EPIMOD%/$url?view=image&mid=$Event->{MonitorId}&eid=$Event->{Id}&fid=objdetect/g;
    $text =~ s/%EPFMODG%/$url?view=frame&mid=$Event->{MonitorId}&eid=$Event->{Id}&fid=objdetect_gif/g;
    $text =~ s/%EPIMODG%/$url?view=image&mid=$Event->{MonitorId}&eid=$Event->{Id}&fid=objdetect_gif/g;

    if ( $attachments_ref ) {
      if ( $text =~ s/%EI1%//g ) {
        my $path = generateImage($Event, $first_alarm_frame);
        if ( -e $path ) {
          push @$attachments_ref, { type=>'image/jpeg', path=>$path };
        } else {
          Warning("Path to first image does not exist at $path");
        }
      }

      if ( $text =~ s/%EIM%//g ) {
        # Don't attach the same image twice
        if ( !@$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 };
          } else {
            Warning("No image for EIM at $path");
          }
        }
      }

      if ( $text =~ s/%EI1A%//g ) {
        my $path = generateImage($Event, $first_alarm_frame, 'analyse');
        if ( -e $path ) {
          push @$attachments_ref, { type=>'image/jpeg', path=>$path };
        } else {
          Warning("No image for EI1A at $path");
        }
      }

      if ( $text =~ s/%EIMA%//g ) {
        # Don't attach the same image twice
        if ( !@$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 };
          } else {
            Warning("No image for EIMA at $path");
          }
        }
      }

      if ( $text =~ s/%EIMOD%//g ) {
        my $path = $Event->Path().'/objdetect.jpg';
        if ( -e $path ) {
          push @$attachments_ref, { type=>'image/jpeg', path=>$path };
        } else {
          Warning('No image for MOD at '.$path);
        }
      }

      if ( $text =~ s/%EIMODG%//g ) {
        my $path = $Event->Path().'/objdetect.gif';
        if ( -e $path ) {
          push @$attachments_ref, { type=>'image/gif', path=>$path };
        } else {
          Warning('No image for MODG at '.$path);
        }
      }

    } # end if attachments_ref
  } # end if $first_alarm_frame

  if ( $attachments_ref ) {
    if ( $text =~ s/%EV%//g ) {
      if ( $$Event{DefaultVideo} ) {
        push @$attachments_ref, { type=>'video/mp4', path=>join('/',$Event->Path(), $Event->DefaultVideo()) };
      } elsif ( $Config{ZM_OPT_FFMPEG} ) {
        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 ( ! $$filter{EmailTo} ) {
    Error('No email address defined, not sending email');
    return 0;
  }

  Debug('Creating notification email');

  my $subject = substituteTags($$filter{EmailSubject}, $filter, $Event);
  return 0 if !$subject;
  my @attachments;
  my $body = substituteTags($$filter{EmailBody}, $filter, $Event, \@attachments);
  return 0 if !$body;

  Debug("Sending notification email '$subject'");

  eval {
    if ( $Config{ZM_NEW_MAIL_MODULES} ) {
### Create the multipart container
      my $mail = MIME::Lite->new (
          From => $Config{ZM_FROM_EMAIL},
          To => $$filter{EmailTo},
          Subject => $subject,
          Type => 'multipart/mixed'
          );
### Add the text message part
      $mail->attach (
          Type => (($body=~/<html/)?'text/html':'text/plain'),
          Data => $body
          );
### Add the attachments
      my $total_size = 0;
      foreach my $attachment ( @attachments ) {
        my $size = -s $attachment->{path};
        $total_size += $size;
        Info("Attaching '$attachment->{path}' which is $size bytes");
        $mail->attach(
            Path => $attachment->{path},
            Type => $attachment->{type},
            Disposition => 'attachment'
            );
      }
      if ( $total_size > 10*1024*1024 ) {
        Warning('Emails larger than 10Mb will often not be delivered! This one is '.int($total_size/(1024*1024)).'Mb');
      }
### Send the Message
      if ( $Config{ZM_SSMTP_MAIL} ) {
        my $ssmtp_location = $Config{ZM_SSMTP_PATH};
        if ( !$ssmtp_location ) {
          Debug("which ssmtp: $ssmtp_location - set ssmtp path in options to suppress this message");
          $ssmtp_location = qx('which ssmtp');
        }
        if ( !$ssmtp_location ) {
          Warning('Unable to find ssmtp, trying MIME::Lite->send');
          MIME::Lite->send('smtp', $Config{ZM_EMAIL_HOST}, Timeout=>60);
          $mail->send();
        } else {
### Send using SSMTP
          $mail->send('sendmail', $ssmtp_location, $$filter{EmailTo});
        }
      } 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 => $$filter{EmailTo},
        Subject => $subject,
        Type => (($body=~/<html/)?'text/html':'text/plain'),
        Data => $body
      );

      my $total_size = 0;
      foreach my $attachment ( @attachments ) {
        my $size = -s $attachment->{path};
        $total_size += $size;
        Debug("Attaching '$attachment->{path}' which is $size bytes");

        $mail->attach(
          Path => $attachment->{path},
          Type => $attachment->{type},
          Encoding => 'base64'
        );
      } # end foreach attachment
      if ( $total_size > 10*1024*1024 ) {
        Warning('Emails larger than 10Mb will often not be delivered! This one is '.int($total_size/(1024*1024)).'Mb');
      }
      $mail->smtpsend(Host => $Config{ZM_EMAIL_HOST}, MailFrom => $Config{ZM_FROM_EMAIL});
    }
  };
  if ( $@ ) {
    Error("Unable to send email: $@");
    return 0;
  } else {
    Info("Notification email sent to $$filter{EmailTo}");
  }
  my $sql = 'UPDATE `Events` SET `Emailed` = 1 WHERE `Id` = ?';
  my $sth = $dbh->prepare_cached($sql)
    or Fatal("Unable to prepare '$sql': ".$dbh->errstr());
  my $res = $sth->execute($Event->{Id})
    or Fatal("Unable to execute '$sql': ".$dbh->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');

  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'");

  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}");
        $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");
          }
          $ssmtp_location = qx('which ssmtp');
        }
        if ( !$ssmtp_location ) {
          Debug('Unable to find 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}'");
        $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 to send email: $@");
    return 0;
  } else {
    Info('Notification message sent');
  }
  my $sql = 'UPDATE `Events` SET `Messaged` = 1 WHERE `Id` = ?';
  my $sth = $dbh->prepare_cached($sql)
    or Fatal("Unable to prepare '$sql': ".$dbh->errstr());
  my $res = $sth->execute($Event->{Id})
    or Fatal("Unable to execute '$sql': ".$dbh->errstr());

  return 1;
} # end sub sendMessage

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

  my $command = $filter->{AutoExecuteCmd}.' '.$Event->Path();
  $command = substituteTags($command, $filter, $Event);

  Info("Executing '$command'");
  my $output = qx($command);
  my $status = $? >> 8;
  if ( $status || logDebugging() ) {
    chomp($output);
    Debug("Output: $output");
  }
  if ($status) {
    Error("Command '$command' exited with status: $status");
    return 0;
  } else {
    zmSQLExecute('UPDATE `Events` SET `Executed` = 1 WHERE `Id` = ?', $Event->{Id});
  }
  return 1;
}

1;
__END__

=head1 NAME

zmfilter.pl - ZoneMinder tool to select events and perform actions on them

=head1 SYNOPSIS

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

=head1 DESCRIPTION

This script performs a specified database query to select recorded events and performs specified actions on them
such as email reporting, deleting, moving, etc.  If the --daemon option is given it will remain resident, repeating
the query and applying actions.  This is normally managed by zmdc.pl however it can be used manually as well.

=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
  --daemon                                 - Causes zmfilter.pl to stay running endlessly repeating the filter(s).
  -v, --version                            - Print ZoneMinder version

=cut