#-------------------------------------------------------------------
# WebGUI is Copyright 2001-2009 Plain Black Corporation.
#-------------------------------------------------------------------
# Please read the legal notices (docs/legal.txt) and the license
# (docs/license.txt) that came with this distribution before using
# this software.
#-------------------------------------------------------------------
# http://www.plainblack.com                     info@plainblack.com
#-------------------------------------------------------------------

our $webguiRoot;

BEGIN {
    $webguiRoot = "..";
    unshift( @INC, $webguiRoot . "/lib" );
}

use strict;
use Fcntl ':flock';
use Getopt::Long;
use WebGUI::Session;
use WebGUI::Storage;

my $configFile;
my $help;
my $migrate;
my $override;
my $quiet;

GetOptions(
    'configFile=s' => \$configFile,
    'override'     => \$override,
    'migrate'      => \$migrate,
    'quiet'        => \$quiet,
);

if ( $configFile eq "" ) {
    printHelp();
    exit 4;
}

if ($help) {
    printHelp();
    exit 2;
}

# don't want two copies of this to run simultaneously
unless ( flock( DATA, LOCK_EX | LOCK_NB ) ) {
    print "$0 is already running. Exiting.\n";
    exit 3;
}

sub printHelp {
    print <<STOP;

Usage: perl $0 --configfile=<webguiConfig>

	--configFile		WebGUI config file.

Options:

	--override		This utility is designed to be run as
				a privileged user on Linux style systems.
				If you wish to run this utility without
				being the super user, then use this flag,
				but note that it may not work as
				intended.

	--migrate		Migrate entirety of uploads directory to CDN.
				Ignore the CDN queue and sync everything.

	--help			Display this help message and exit.

	--quiet			Disable output unless there's an error.

EXIT STATUS

  The following exit values are returned:

  0
	Successful execution.

  1
	Only super user may run the script.

  2
	Help requested.

  3
	Only one instance of this script can run at a time.

  4
	Error during invocation of the command.

  5
	Content Delivery Network (CDN) is not enabled.

STOP
} ## end sub printHelp

if ( !( $^O =~ /^Win/i ) && $> != 0 && !$override ) {
    print "You must be the super user to use this utility.\n";
    exit 1;
}

print "Starting..." unless ($quiet);
my $session = WebGUI::Session->open( $webguiRoot, $configFile );
$session->user( { userId => 3 } );
print "OK\n" unless ($quiet);

my $cdnCfg = $session->config->get('cdn');
unless ( $cdnCfg and $cdnCfg->{'enabled'} and $cdnCfg->{'queuePath'} ) {
    print "Content delivery network (CDN) is not enabled in $configFile.\n";
    exit 5;
}

# Here is the core of the script
if ($migrate) {
    syncUploads($session);
}
else {
    syncQueue( $session, $cdnCfg );
}

print "Cleaning up..." unless ($quiet);
$session->var->end();
$session->close();

print "OK\n" unless ($quiet);
exit 0;

#-----------------------------------------
# syncQueue(session, cdnConfig)
#-----------------------------------------

sub syncQueue {
    my $session = shift;
    my $cdnCfg  = shift;
    my $locIter = WebGUI::Storage->getCdnFileIterator($session);
    while ( my $store = $locIter->() ) {
        my $ctrlFile = $cdnCfg->{'queuePath'} . '/' . $store->getDirectoryId;
        if ( -r $ctrlFile and -s $ctrlFile < 12 ) {
            if ( !-s $ctrlFile ) {    # Empty means sync/add/update
                $store->syncToCdn;
            }
            else {                    # expect "deleted" but be careful.
                if ( open my $ctrlFH, "<$ctrlFile" ) {
                    my $directive = <$ctrlFH>;
                    chomp $directive;
                    close $ctrlFH;
                    if ( $directive =~ m/^deleted$/i ) {
                        $store->deleteFromCdn;
                    }                 # else unknown - ignore
                }
                else {
                    warn "Cannot read CDN control file $ctrlFile.";
                    $session->errorHandler->warn("Cannot read CDN control file $ctrlFile.");
                }
            }
        } ## end if ( -r $ctrlFile and ...
        else {                        # missing or invalid
		    warn "No recognizable CDN control file $ctrlFile.";
		    $session->errorHandler->warn("No recognizable CDN control file $ctrlFile.");
        }
    } ## end while ( my $store = $locIter...
}    # end syncQueue

#-----------------------------------------
# syncUploads(session)
#-----------------------------------------

sub syncUploads {
    my $session = shift;

    # Alternate approach would be touch queue files, then run queue.
    my $uDir = $session->config->get('uploadsPath');
    if ( opendir my $DH, $uDir ) {
        my @part1 = grep { !/^\.+$/ } readdir($DH);
        foreach my $subdir (@part1) {
            if ( opendir my $SD, "$uDir/$subdir" ) {
                my @part2 = grep { !/^\.+$/ } readdir($SD);
                foreach my $sub2 (@part2) {
                    if ( opendir my $S2, "$uDir/$subdir/$sub2" ) {
                        my @fileId = grep { !/^\.+$/ } readdir($S2);
                        foreach my $fileId (@fileId) {
 			    my $storageId = $fileId;
			    if (length($storageId) > 22) {
			        # need to convert from hex
				$storageId = $session->id->fromHex($storageId);
			    }
                            my $store = WebGUI::Storage->get( $session, $storageId );
                            $store->syncToCdn;    # here is the meat
                        }
                        close $S2;
                    }
                    else {
                        $session->errorHandler->warn("Unable to open $sub2 for directory reading");
                    }
                }
                close $SD;
            } ## end if ( opendir my $SD, "$uDir/$subdir")
            else {
                $session->errorHandler->warn("Unable to open $subdir for directory reading");
            }
        } ## end foreach my $subdir (@part1)
        close $DH;
    } ## end if ( opendir my $DH, $uDir)
    else {
        $session->errorHandler->warn("Unable to open $uDir for directory reading");
    }
}    # end syncUploads

__DATA__
This exists so flock() code above works.
DO NOT REMOVE THIS DATA SECTION.