#!/usr/bin/perl -w
#
# ==========================================================================
#
# 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
#
# ==========================================================================
#
# 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.
#
use strict;
use bytes;

use lib '/usr/lib64/perl5';
use ZoneMinder::Config qw(:all);
use ZoneMinder::Logger qw(:all);
use ZoneMinder::Database qw(:all);
use DBI;
use Getopt::Long;

$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};

# Process commandline parameters with getopt long
if ( !GetOptions( 'export'=>\$export, 'import'=>\$import, 'overwrite'=>\$overwrite, 'help'=>\$help, 'topreset'=>\$topreset, 'noregex'=>\$noregex, 'user:s'=>\$dbUser, 'pass:s'=>\$dbPass ) ) {
	Usage();
}

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

# 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/ );
	Usage();
}

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/ );
	Usage();
}

# Call the appropriate subroutine based on the params given on the commandline
if ($help) {
	Usage();
}

if ($export) {
	exportsql();
}

if ($import) {
	importsql();
}

if ($topreset) {
	toPreset();
}

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

# Usage subroutine help text
sub Usage
{
die("
USAGE: 
zmcamtool.pl [--user=<dbuser> --pass=<dbpass>]
	     [--import [file.sql] [--overwrite]]
	     [--export [name]]
	     [--topreset id [--noregex]]

PARAMETERS:
--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.
\n");
}

# 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;
		}
	}

if ($ARGV[0]) {
	$command .= qq( --where="Name = '$ARGV[0]'");
}

$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 (!$noregex) {
		foreach (@data) {
			s/\b(?:\d{1,3}\.){3}\d{1,3}\b/<ip-address>/; # ip address
			s/<ip-address>:(6553[0-5]|655[0-2]\d|65[0-4]\d\d|6[0-4]\d{3}|[1-5]\d{4}|[1-9]\d{0,3}|0)$/<ip-address>:<port>/; # tcpip port
			s/\/\/.*:.*@/\/\/<username>:<pwd>@/; # user & pwd preceeding an ip address
			s/(&|\?)(user|username)=\w\w*(&|\?)/$1$2=<username>$3/i; # username embeded in url
			s/(&|\?)(pwd|password)=\w\w*(&|\?)/$1$2=<pwd>$3/i; # password embeded 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";
	}
}

