#!@PERL_EXECUTABLE@ -wT
#
# ==========================================================================
#
# ZoneMinder Update 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

zmcamtool.pl - ZoneMinder tool to import camera controls and presets

=head1 SYNOPSIS

 zmcamtool.pl [--user=<dbuser> --pass=<dbpass>]
              [--import [file.sql] [--overwrite]]
              [--export [name]]
              [--topreset id [--noregex]]

=head1 DESCRIPTION

This script provides a way to import new ptz camera controls & camera presets
into existing zoneminder systems. This script also provides a way to export
ptz camera controls & camera presets from an existing zoneminder system into
a sql file, which can then be easily imported to another zoneminder system.

=head1 OPTIONS

 --export            - Export all camera controls and presets to STDOUT.
                       Optionally specify a control or preset name.
 --import [file.sql] - Import new camera controls and presets found in
                       zm_create.sql into the ZoneMinder dB.
                       Optionally specify an alternate sql file to read from.
 --overwrite         - Overwrite any existing controls or presets.
                       with the same name as the new controls or presets.
 --topreset id       - Copy a monitor to a Camera Preset given the monitor id.
 --noregex           - Do not try to find and replace fields such as usernames,
                       passwords, IP addresses, etc with generic placeholders
                       when converting a monitor to a preset.
 --help              - Print usage information.
 --user=<dbuser>     - Alternate dB user with privileges to alter dB.
 --pass=<dbpass>     - Password of alternate dB user with privileges to alter dB.
 --version           - Print version.

=cut
use strict;
use bytes;

@EXTRA_PERL_LIB@
use ZoneMinder::Config qw(:all);
use ZoneMinder::Logger qw(:all);
use ZoneMinder::Database qw(:all);
use DBI;
use Getopt::Long;
use autouse 'Pod::Usage'=>qw(pod2usage);

$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 $web_uid = (getpwnam( $Config{ZM_WEB_USER} ))[2];
my $use_log = (($> == 0) || ($> == $web_uid));

logInit( toFile=>$use_log?DEBUG:NOLOG );
logSetSignal();

my $export = 0;
my $import = 0;
my $overwrite = 0;
my $help = 0;
my $topreset = 0;
my $noregex = 0;
my $sqlfile = '';
my $dbUser = $Config{ZM_DB_USER};
my $dbPass = $Config{ZM_DB_PASS};
my $version = 0;

GetOptions(
    'export'        =>\$export,
    'import'        =>\$import,
    'overwrite'     =>\$overwrite,
    'help'          =>\$help,
    'topreset'      =>\$topreset,
    'noregex'       =>\$noregex,
    'user:s'        =>\$dbUser,
    'pass:s'        =>\$dbPass,
    'version'       =>\$version
) or pod2usage(-exitstatus => -1);

$Config{ZM_DB_USER} = $dbUser;
$Config{ZM_DB_PASS} = $dbPass;

if ( $version ) {
  print( ZoneMinder::Base::ZM_VERSION . "\n");
  exit(0);
}
# Check to make sure commandline params make sense
if ( ((!$help) && ($import + $export + $topreset) != 1 )) {
  print( STDERR qq/Please give only one of the following: "import", "export", or "topreset".\n/ );
  pod2usage(-exitstatus => -1);
}

if ( ($export)&&($overwrite) ) {
  print( "Warning: Overwrite parameter ignored during an export.\n");
}

if ( ($noregex)&&(!$topreset) ) {
  print( qq/Warning: Noregex parameter only applies when "topreset" parameter is also set. Ignoring.\n/);
}

if ( ($topreset)&&($ARGV[0] !~ /\d\d*/) ) {
  print( STDERR qq/Parameter "topreset" requires a valid monitor ID.\n/ );
  pod2usage(-exitstatus => -1);
}

# Call the appropriate subroutine based on the params given on the commandline
if ($help) {
  pod2usage(-exitstatus => -1);
}

if ($export) {
  exportsql();
}

if ($import) {
  importsql();
}

if ($topreset) {
  toPreset();
}

###############
# SUBROUTINES #
###############

# Execute a pre-built sql select query
sub selectQuery {
  my $dbh = shift;
  my $sql = shift;
  my $monitorid = shift;

  my $sth = $dbh->prepare_cached( $sql )
    or die( "Can't prepare '$sql': ".$dbh->errstr() );
  my $res = $sth->execute($monitorid)
    or die( "Can't execute: ".$sth->errstr() );

  my @data = $sth->fetchrow_array();
  $sth->finish();

  return @data;
}

# Exectute a pre-built sql query
sub runQuery {
  my $dbh = shift;
  my $sql = shift;
  my $sth = $dbh->prepare_cached( $sql )
    or die( "Can't prepare '$sql': ".$dbh->errstr() );
  my $res = $sth->execute()
    or die( "Can't execute: ".$sth->errstr() );
  $sth->finish();

  return $res;
}

# Build and execute a sql insert query
sub insertQuery {
  my $dbh = shift;
  my $tablename = shift;
  my @data = @_;

  my $sql = "INSERT INTO $tablename VALUES (NULL,"
    .(join ', ', ('?') x @data).')'; # Add "?" for each array element

    my $sth = $dbh->prepare_cached( $sql )
    or die( "Can't prepare '$sql': ".$dbh->errstr() );
  my $res = $sth->execute(@data)
    or die( "Can't execute: ".$sth->errstr() );
  $sth->finish();

  return $res;
}

# Build and execute a sql delete query
sub deleteQuery {
  my $dbh = shift;
  my $sqltable = shift;
  my $sqlname = shift;

  my $sql = "DELETE FROM $sqltable WHERE Name = ?";
  my $sth = $dbh->prepare_cached( $sql )
    or die( "Can't prepare '$sql': ".$dbh->errstr() );
  my $res = $sth->execute($sqlname)
    or die( "Can't execute: ".$sth->errstr() );
  $sth->finish();

  return $res;
}

# Build and execute a sql select count query
sub checkExists {
  my $dbh = shift;
  my $sqltable = shift;
  my $sqlname = shift;
  my $result = 0; 

  my $sql = "SELECT count(*) FROM $sqltable WHERE Name = ?";
  my $sth = $dbh->prepare_cached( $sql )
    or die( "Can't prepare '$sql': ".$dbh->errstr() );
  my $res = $sth->execute($sqlname)
    or die( "Can't execute: ".$sth->errstr() );

  my $rows = $sth->fetchrow_arrayref();
  $sth->finish();

  if ($rows->[0] > 0) {
    $result = 1;
  }

  return $result;
}

# Import camera control & presets into the zoneminder dB
sub importsql {
  my @newcontrols;
  my @overwritecontrols;
  my @skippedcontrols;
  my @newpresets;
  my @overwritepresets;
  my @skippedpresets;
  my %controls;
  my %monitorpresets;

  if ($ARGV[0]) {
    $sqlfile = $ARGV[0];
  } else {
    $sqlfile = $Config{ZM_PATH_DATA}.'/db/zm_create.sql';
  }

  open(my $SQLFILE,'<',$sqlfile)
    or die( "Can't Open file: $!\n" );

# Find and extract ptz control and monitor preset records
  while (<$SQLFILE>) {
# Our regex replaces the primary key with NULL
    if (s/^(INSERT INTO .*?Controls.*? VALUES \().*?(,')(.*?)(',.*)/$1NULL$2$3$4/i) {   
      $controls{$3} = $_;
    } elsif (s/^(INSERT INTO .*?MonitorPresets.*? VALUES \().*?(,')(.*?)(',.*)/$1NULL$2$3$4/i) {
      $monitorpresets{$3} = $_;
    }
  }
  close $SQLFILE;

  if ( ! (%controls || %monitorpresets) ) {
    die( "Error: No relevant data found in $sqlfile.\n" );
  }

# Now that we've got what we were looking for,
# compare to what is already in the dB

  my $dbh = zmDbConnect();
  foreach (keys %controls) {
    if (!checkExists($dbh,'Controls',$_)) {
# No existing Control was found. Add new control to dB.
      runQuery($dbh,$controls{$_});
      push @newcontrols, $_;
    } elsif ($overwrite) {
# An existing Control was found and the overwrite flag is set.
# Overwrite the control.
      deleteQuery($dbh,'Controls',$_);
      runQuery($dbh,$controls{$_});
      push @overwritecontrols, $_;
    } else {
# An existing Control was found and the overwrite flag was not set.
# Do nothing.
      push @skippedcontrols, $_;
    }   
  }

  foreach (keys %monitorpresets) {
    if (!checkExists($dbh,'MonitorPresets',$_)) {
# No existing MonitorPreset was found.  Add new MonitorPreset to dB.
      runQuery($dbh,$monitorpresets{$_});
      push @newpresets, $_;
    } elsif ($overwrite) {
# An existing MonitorPreset was found and the overwrite flag is set.
# Overwrite the MonitorPreset.
      deleteQuery($dbh,'MonitorPresets',$_);
      runQuery($dbh,$monitorpresets{$_});
      push @overwritepresets, $_;
    } else {
# An existing MonitorPreset was found and the overwrite flag was
# not set. Do nothing.
      push @skippedpresets, $_;
    }
  }

  if (@newcontrols) {
    print 'Number of ptz camera controls added: '
      .scalar(@newcontrols)."\n";
  }
  if (@overwritecontrols) {
    print 'Number of existing ptz camera controls overwritten: '
      .scalar(@overwritecontrols)."\n";
  }
  if (@skippedcontrols) {
    print 'Number of existing ptz camera controls skipped: '
      .scalar(@skippedcontrols)."\n";
  }

  if (@newpresets) {
    print 'Number of monitor presets added: '
      .scalar(@newpresets)."\n";
  }
  if (@overwritepresets) {
    print 'Number of existing monitor presets overwritten: '
      .scalar(@overwritepresets)."\n";
  }
  if (@skippedpresets) {
    print 'Number of existing presets skipped: '
      .scalar(@skippedpresets)."\n";
  }
}

# Export camera controls & presets from the zoneminder dB to STDOUT
sub exportsql {

  my ( $host, $port ) = ( $Config{ZM_DB_HOST} =~ /^([^:]+)(?::(.+))?$/ );
  my $command = 'mysqldump -t --skip-opt --compact -h'.$host;
  $command .= ' -P'.$port if defined($port);
  if ( $dbUser ) {
    $command .= ' -u'.$dbUser;
    if ( $dbPass ) {
      $command .= ' -p'.$dbPass;
    }
  }

  my $name = $ARGV[0];
  if ($name) {
    $name =~ /([A-Za-z0-9 -]*)/; # Only allow alphanumeric, dash and space
    $name = $1;
    $command .= qq( --where="Name = '$name'");
  }

  $command .= " zm Controls MonitorPresets";

  my $output = qx($command);
  my $status = $? >> 8;
  if ( $status || logDebugging() ) {
    chomp( $output );
    print( "Output: $output\n" );
  }
  if ( $status ) {
    die( "Command '$command' exited with status: $status\n" );
  } else {
# NULLify the primary keys before printing the output to STDOUT
    $output =~ s/VALUES \((.*?),'/VALUES \(NULL,'/ig;
    print $output;
  }
}

sub toPreset {
  my $dbh = zmDbConnect();
  my $monitorid = $ARGV[0];

# Grap the following fields from the Monitors table
  my $sql = 'SELECT 
    Name, 
    Type, 
    Device, 
    Channel, 
    Format, 
    Protocol, 
    Method, 
    Host, 
    Port, 
    Path, 
    SubPath, 
    Width, 
    Height, 
    Palette, 
    MaxFPS, 
    Controllable, 
    ControlId, 
    ControlDevice, 
    ControlAddress, 
    DefaultRate, 
    DefaultScale 
      FROM Monitors WHERE Id = ?';
  my @data = selectQuery($dbh,$sql,$monitorid);

  if (!@data) {
    die( "Error: Monitor Id $monitorid does not appear to exist in the database.\n" );
  }

# Attempt to search for and replace system specific values such as
# ip addresses, ports, usernames, etc. with generic placeholders
  if (!$noregex) {
    foreach (@data) {
      next if ! $_;
      s/\b(?:\d{1,3}\.){3}\d{1,3}\b/<ip-address>/; # ip address
        s/<ip-address>:(6553[0-5]|655[0-2]\d|65[0-4]\d\d|6[0-4]\d{3}|[1-5]\d{4}|[1-9]\d{0,3}|0)$/<ip-address>:<port>/; # tcpip port
        s/\/\/.*:.*@/\/\/<username>:<pwd>@/; # user & pwd preceding an ip address
        s/(&|\?)(user|username)=\w\w*(&|\?)/$1$2=<username>$3/i; # username embedded in url
        s/(&|\?)(pwd|password)=\w\w*(&|\?)/$1$2=<pwd>$3/i; # password embedded in url
        s/\w\w*:\w\w*/<username>:<pwd>/; # user & pwd in their own field
        s/\/dev\/video\d\d*/\/dev\/video<?>/; # local video devices
    }
  }

  if (!checkExists($dbh,"MonitorPresets",$data[0])) {
# No existing Preset was found.  Add new Preset to dB.
    print "Adding new preset: $data[0]\n";
    insertQuery($dbh,'MonitorPresets',@data);
  } elsif ($overwrite) {
# An existing Control was found and the overwrite flag is set.
# Overwrite the control.
    print "Existing preset $data[0] detected.\nOverwriting...\n";
    deleteQuery($dbh,'MonitorPresets',$data[0]);
    insertQuery($dbh,'MonitorPresets',@data);
  } else {
# An existing Control was found and the overwrite flag was not set.
# Do nothing.
    print "Existing preset $data[0] detected and overwrite flag not set.\nSkipping...\n";
  }
}

1;
__END__