#!/usr/bin/perl -wT
#
# ==========================================================================
#
# ZoneMinder Package Control 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;

# ==========================================================================
#
# Don't change anything below here
#
# ==========================================================================

@EXTRA_PERL_LIB@
use ZoneMinder;
use DBI;
use POSIX;
use Time::HiRes qw/gettimeofday/;
use autouse 'Pod::Usage'=>qw(pod2usage);

# Detaint our environment
$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 $store_state=''; # PP - will remember state name passed

logInit();

my $command = $ARGV[0]||'';
if ( $command eq 'version' ) {
  print ZoneMinder::Base::ZM_VERSION . "\n";
  exit(0);
}

my $state;

my $dbh = zmDbConnect();
Debug("Command: $command");
if ( $command and ( $command !~ /^(?:start|stop|restart|status|logrot|version)$/ ) ) {
  # Check to see if it's a valid run state
  my $sql = 'SELECT * FROM States WHERE Name=?';
  my $sth = $dbh->prepare_cached($sql)
    or Fatal("Can't prepare '$sql': ".$dbh->errstr());
  my $res = $sth->execute($command)
    or Fatal("Can't execute: ".$sth->errstr());
  if ( $state = $sth->fetchrow_hashref() ) {
    #$state->{Name} = $command;
    $state->{Definitions} = [];
    foreach( split(',', $state->{Definition}) ) {
      my ( $id, $function, $enabled ) = split(':', $_);
      push( @{$state->{Definitions}},
        { Id=>$id, Function=>$function, Enabled=>$enabled }
      );
    }
    $store_state = $command; # PP - Remember the name that was passed to search in DB
    $command = 'state';
  } else {
    $command = undef;
  }
  $sth->finish();
} # end if not one of the usual commands

if ( !$command ) {
  pod2usage(-exitstatus => -1);
}

# PP - Sane state check
Debug("StartisActiveSSantiyCheck");
isActiveSanityCheck();
Debug("Done isActiveSSantiyCheck");

# Move to the right place
chdir($Config{ZM_PATH_WEB})
  or Fatal("Can't chdir to '$Config{ZM_PATH_WEB}': $!");

my $dbg_id = '';

Info("Command: $command");

my $retval = 0;

if ( $command eq 'state' ) {
  Info("Updating DB: $state->{Name}");
  my $sql = 'SELECT * FROM Monitors' . ($Config{ZM_SERVER_ID} ? ' WHERE ServerId=?' : '' ) .' ORDER BY Id ASC';
  my $sth = $dbh->prepare_cached($sql)
    or Fatal("Can't prepare '$sql': ".$dbh->errstr());
  my $res = $sth->execute($Config{ZM_SERVER_ID} ? $Config{ZM_SERVER_ID}: ())
    or Fatal("Can't execute: ".$sth->errstr());
  while( my $monitor = $sth->fetchrow_hashref() ) {
    foreach my $definition ( @{$state->{Definitions}} ) {
      if ( $monitor->{Id} =~ /^$definition->{Id}$/ ) {
        $monitor->{NewFunction} = $definition->{Function};
        $monitor->{NewEnabled} = $definition->{Enabled};
      }
    }
    #next if ( !$monitor->{NewFunction} );
    $monitor->{NewFunction} = 'None'
    if ( !$monitor->{NewFunction} );
    $monitor->{NewEnabled} = 0
    if ( !$monitor->{NewEnabled} );
    if ( $monitor->{Function} ne $monitor->{NewFunction}
      || $monitor->{Enabled} ne $monitor->{NewEnabled}
    ) {
      my $sql = 'UPDATE Monitors SET Function=?, Enabled=? WHERE Id=?';
      my $sth = $dbh->prepare_cached($sql)
        or Fatal("Can't prepare '$sql': ".$dbh->errstr());
      my $res = $sth->execute($monitor->{NewFunction}, $monitor->{NewEnabled}, $monitor->{Id})
        or Fatal("Can't execute: ".$sth->errstr());
    } # end if change of function or enablement
  } # end foreach monitor
  $sth->finish();

  # PP - Now mark a specific state as active
  resetStates();
  Info("Marking $store_state as Enabled");
  $sql = 'UPDATE States SET IsActive = 1 WHERE Name = ?';
  $sth = $dbh->prepare_cached($sql)
    or Fatal("Can't prepare '$sql': ".$dbh->errstr());
  $res = $sth->execute($store_state)
    or Fatal("Can't execute: ".$sth->errstr());

  # PP - zero out other states isActive
  $command = 'restart';
} # end if command = state

# Check if we are running systemd and if we have been called by the system
if ( $command =~ /^(start|stop|restart)$/ ) {
# We have to detaint to keep perl from complaining
  $command = $1;

  if ( systemdRunning() && !calledBysystem() ) {
    qx(@BINDIR@/zmsystemctl.pl $command);
    $command = '';
  }
}

if ( $command =~ /^(?:stop|restart)$/ ) {
  my $status = runCommand('zmdc.pl check');
  Debug("zmdc.pl check = $status");

  if ( $status eq 'running' ) {
    runCommand('zmdc.pl shutdown');
    zmMemTidy();
  } else {
    $retval = 1;
  }
}

if ( $command =~ /^(?:start|restart)$/ ) {
  my $status = runCommand('zmdc.pl check');
  Debug("zmdc.pl check = $status");

  if ( $status eq 'stopped' ) {
    if ( $Config{ZM_DYN_DB_VERSION}
        and ( $Config{ZM_DYN_DB_VERSION} ne ZM_VERSION )
       ) {
      Fatal('Version mismatch, system is version '.ZM_VERSION
          .', database is '.$Config{ZM_DYN_DB_VERSION}
          .', please run zmupdate.pl to update.'
          );
      exit(-1);
    }

# Recreate the temporary directory if it's been wiped
    verifyFolder('@ZM_TMPDIR@');

# Recreate the run directory if it's been wiped
    verifyFolder('@ZM_RUNDIR@');

# Recreate the sock directory if it's been wiped
    verifyFolder('@ZM_SOCKDIR@');

    zmMemTidy();
    runCommand('zmdc.pl startup');

    my $Server = undef;
    my $sql;
    my @values;
    if ( $Config{ZM_SERVER_ID} ) {
      require ZoneMinder::Server;
      Info("Multi-server configuration detected. Starting up services for server $Config{ZM_SERVER_ID}");
      $Server = new ZoneMinder::Server($Config{ZM_SERVER_ID});
      $sql = 'SELECT * FROM Monitors WHERE ServerId=?';
      @values = ( $Config{ZM_SERVER_ID} );
    } else {
      Info('Single server configuration detected. Starting up services.');
      $sql = 'SELECT * FROM Monitors';
    }

    {
      my $sth = $dbh->prepare_cached($sql)
        or Fatal("Can't prepare '$sql': ".$dbh->errstr());
      my $res = $sth->execute(@values)
        or Fatal("Can't execute: ".$sth->errstr());
      while( my $monitor = $sth->fetchrow_hashref() ) {
        if ( $monitor->{Function} ne 'None' && $monitor->{Type} ne 'WebSite' ) {
          if ( $monitor->{Type} eq 'Local' ) {
            runCommand("zmdc.pl start zmc -d $monitor->{Device}");
          } else {
            runCommand("zmdc.pl start zmc -m $monitor->{Id}");
          }
          if ( $monitor->{Function} ne 'Monitor' ) {
            runCommand("zmdc.pl start zma -m $monitor->{Id}");
          }
          if ( $Config{ZM_OPT_CONTROL} ) {
            if ( $monitor->{Controllable} && $monitor->{TrackMotion} ) {
              if ( $monitor->{Function} eq 'Modect' || $monitor->{Function} eq 'Mocord' ) {
                runCommand( "zmdc.pl start zmtrack.pl -m $monitor->{Id}" );
              } else {
                Warning(' Monitor is set to track motion, but does not have motion detection enabled.');
              } # end if Has motion enabled
            } # end if track motion
          } # end if ZM_OPT_CONTROL
        } # end if function is not none or Website
      } # end foreach monitor
      $sth->finish();
    }

    {
      my $sql = 'SELECT Id FROM Filters WHERE Background=1';
      my $sth = $dbh->prepare_cached($sql)
        or Fatal("Can't prepare '$sql': ".$dbh->errstr());
      my $res = $sth->execute()
        or Fatal("Can't execute: ".$sth->errstr());
      if ( $sth->rows ) {
        while( my $filter = $sth->fetchrow_hashref() ) {
  # This is now started unconditionally
          runCommand("zmdc.pl start zmfilter.pl --filter_id=$$filter{Id} --daemon");
        }
      } else {
        runCommand('zmdc.pl start zmfilter.pl');
      }
      $sth->finish();
    }

    if ( $Config{ZM_RUN_AUDIT} ) {
      if ( $Server and exists $$Server{'zmaudit'} and ! $$Server{'zmaudit'} ) {
        Debug("Not running zmaudit.pl because it is turned off for this server.");
      } else {
        runCommand('zmdc.pl start zmaudit.pl -c');
      }
    }
    if ( $Config{ZM_OPT_TRIGGERS} ) {
      if ( $Server and exists $$Server{'zmtrigger'} and ! $$Server{'zmtrigger'} ) {
        Debug("Not running zmtrigger.pl because it is turned off for this server.");
      } else {
        runCommand('zmdc.pl start zmtrigger.pl');
      }
    }
    if ( $Config{ZM_OPT_X10} ) {
      runCommand('zmdc.pl start zmx10.pl -c start');
    }
    runCommand('zmdc.pl start zmwatch.pl');
    if ( $Config{ZM_CHECK_FOR_UPDATES} ) {
      runCommand('zmdc.pl start zmupdate.pl -c');
    }
    if ( $Config{ZM_TELEMETRY_DATA} ) {
      runCommand('zmdc.pl start zmtelemetry.pl');
    }
    if ($Config{ZM_OPT_USE_EVENTNOTIFICATION} ) {
        runCommand('zmdc.pl start zmeventnotification.pl');
    }
    if ( $Server and exists $$Server{'zmstats'} and ! $$Server{'zmstats'} ) {
      Debug("Not running zmstats.pl because it is turned off for this server.");
    } else {
      runCommand('zmdc.pl start zmstats.pl');
    }
  } else {
    $retval = 1;
  }
} # end if command is start or restart

if ( $command eq 'status' ) {
  my $status = runCommand('zmdc.pl check');

  print(STDOUT $status."\n");
} elsif ( $command eq 'logrot' ) {
  runCommand('zmdc.pl logrot');
}

exit($retval);

# PP - Make sure isActive is on and only one
sub isActiveSanityCheck {

  Info('Sanity checking States table...');
  $dbh = zmDbConnect() if ! $dbh;

# PP - First, make sure default exists and there is only one
  my $sql = q`SELECT Name FROM States WHERE Name='default'`;
  my $sth = $dbh->prepare_cached($sql)
    or Fatal("Can't prepare '$sql': ".$dbh->errstr());
  my $res = $sth->execute()
    or Fatal("Can't execute: ".$sth->errstr());

  if ( $sth->rows != 1 ) {
# PP - no row, or too many rows. Either case is an error
    Info('Fixing States table - either no default state or duplicate default states');
    if ( $sth->rows ) {
      $dbh->do(q`DELETE FROM States WHERE Name='default'`) or Fatal("Can't execute: ".$dbh->errstr());
    }
    $dbh->do(q`INSERT INTO States (Name,Definition,IsActive) VALUES ('default','','1');`) 
      or Fatal("Can't execute: ".$dbh->errstr());
  }
  $sth->finish();

# PP - Now make sure no two states have IsActive=1
  $sql = 'SELECT Name FROM States WHERE IsActive = 1';
  $sth = $dbh->prepare_cached($sql)
    or Fatal("Can't prepare '$sql': ".$dbh->errstr());
  $res = $sth->execute()
    or Fatal("Can't execute: ".$sth->errstr());

  if ( $sth->rows != 1 ) {
    Info('Fixing States table so only one run state is active');
    resetStates();
    $dbh->do(q`UPDATE States SET IsActive=1 WHERE Name='default'`)
      or Fatal("Can't execute: ".$dbh->errstr());
  }
  $sth->finish();
} # end sub isActiveSanityCheck

# PP - zeroes out isActive for all states
sub resetStates {
  $dbh = zmDbConnect() if ! $dbh;
  $dbh->do('UPDATE States SET IsActive=0')
    or Fatal("Can't execute: ".$dbh->errstr());
}

sub systemdRunning {
  my $output = qx(ps -o comm="" -p 1);
  return scalar ( $output =~ /systemd/ );
}

sub calledBysystem {
  my $ppid = getppid();

  my $output = qx(ps -o comm="" -p $ppid);
  #chomp( $output );

  return ($output =~ /^(?:systemd|init)$/);
}

sub verifyFolder {
  my $folder = shift;

  # Recreate the temporary directory if it's been wiped
  if ( !-e $folder ) {
    Debug("Recreating directory '$folder'");
    mkdir($folder, 0774)
      or Fatal( "Can't create missing temporary directory '$folder': $!" );
    my ( $runName ) = getpwuid($>);
    if ( $runName ne $Config{ZM_WEB_USER} ) {
      # Not running as web user, so should be root in which case
      # chown the directory
      my ( $webName, $webPass, $webUid, $webGid ) = getpwnam($Config{ZM_WEB_USER})
        or Fatal("Can't get details for web user '$Config{ZM_WEB_USER}': $!");
      chown($webUid, $webGid, $folder)
        or Fatal("Can't change ownership of '$folder' to '"
            .$Config{ZM_WEB_USER}.':'.$Config{ZM_WEB_GROUP}."': $!"
            );
    } # end if runName ne ZM_WEB_USER
  } # end if folder doesn't exist
} # end sub verifyFolder

1;
__END__

=head1 NAME

zmpkg.pl - ZoneMinder Package Control Script

=head1 SYNOPSIS

zmpkg.pl {start|stop|restart|status|logrot|'state'|version}

=head1 DESCRIPTION

  This script is used to start and stop the ZoneMinder package primarily to
allow command line control for automatic restart on reboot (see zm script)

=cut