#!/usr/bin/perl -w
# -*- perl -*-

#
# $Id: we_content_upgrade,v 1.9 2004/10/05 18:56:36 eserte Exp $
# Author: Slaven Rezic
#
# Copyright (C) 2001 Online Office Berlin. All rights reserved.
# Copyright (C) 2002 Slaven Rezic.
# This is free software; you can redistribute it and/or modify it under the
# terms of the GNU General Public License, see the file COPYING.
#
# Mail: slaven@rezic.de
# WWW:  http://we-framework.sourceforge.net
#

use WE_Content::Base;
use WE_Content::Tools;
use Getopt::Long;

BEGIN {
    if ($] == 5.008) {
	eval q{use open IN => ':bytes', OUT => ':bytes' };
	warn $@ if $@;
    }
}

my $root_dir;
my $prototype_opt; # will be either $prototype_file or $prototype_dir
my $prototype_file;
my $prototype_dir;
my $n = 1;
my $v;
my %prototypes; # for multiple prototypes (directory)
my $prototype;  # for a single prototype (file)

if (!GetOptions("upgrade!" => sub { $n = 0 },
		"v" => \$v,
		"rootdir=s"  => \$root_dir,
		"template|prototype=s" => \$prototype_opt,
	       )) {
    usage();
}

sub usage {
    require Pod::Usage;
    Pod::Usage::pod2usage(1);
}

my @content_files = @ARGV;

if (defined $prototype_opt) {
    if (-f $prototype_opt) {
	$prototype_file = $prototype_opt;
    } elsif (-d $prototype_opt) {
	$prototype_dir = $prototype_opt;
    } else {
	die "-prototype|-prototype $prototype_opt is not a valid file or directory";
    }
}

if ($root_dir && !defined $prototype_opt) {
    $prototype_dir = $root_dir;
}

if (defined $prototype_dir) {
    my(@prototype_files) = glob("$prototype_dir/empty_*.bin");
    if (!@prototype_files) {
	die "No prototype/prototype files in directory $prototype_dir found";
    }
    foreach my $prototype_file (@prototype_files) {
	my $prototype_obj = WE_Content::Base->new(-file => $prototype_file);
	die "$prototype_file is not a valid prototype"
	    if !$prototype_obj->is_prototype;
	my($pagetype) = $prototype_file =~ m{empty_(.*?)\.bin$};
	#XXX remove... $prototype_obj->{Object}{"pagetype"}
	if (defined $pagetype) {
	    $prototypes{$pagetype} = $prototype_obj;
	} else {
	    my $title = $prototype_obj->{Object}{"title"};
	    if (defined $title) {
		$prototypes{$title} = $prototype_obj
	    } else {
		die "Cannot get title or pagetype from prototype object $prototype_file";
	    }
	}
    }
    if ($v) {
	warn "Found prototypes: " . join(", ", keys %prototypes) . "\n";
    }
} elsif (defined $prototype_file) {
    $prototype = WE_Content::Base->new(-file => $prototype_file);
    die "$prototype_file is not a valid prototype"
	if !$prototype->is_prototype;
} else {
    die "Please specify either -rootdir or -prototype";
}

foreach my $content_file (@content_files) {
    my $content  = new WE_Content::Base -file => $content_file;
    my $prototype = $prototype;
    if (!defined $prototype) { # prototype directory --- find the right prototype
	my $pagetype = $content->{Object}{"data"}{"pagetype"};
	if (defined $pagetype) {
	    $prototype = $prototypes{$pagetype};
	}
	if (!defined $prototype) {
	    my $title = $content->{Object}{"title"} || "";
	    $prototype = $prototypes{$title};
	    if (!defined $prototype) {
		warn "Cannot get right prototype for title=$title (file=$content_file), skipping...\n";
	    }
	}
    }

    my(%diff) = $content->get_structure_diffs($prototype);
    if ($n) {
	use Data::Dumper;
	print "$content_file...\n";
	print Data::Dumper->Dumpxs([\%diff],['diff']);
    } else {
	$content->upgrade($prototype);
	open(OUT, ">$content_file~") or die "Can't write to $content_file~: $!";
	print OUT $content->serialize or die $!;
	close OUT or die $!;
	rename $content_file, "$content_file~~" or die $!;
	rename "$content_file~", $content_file or die $!;
	rename "$content_file~~", "$content_file~";
    }
}

__END__

=head1 NAME

we_content_upgrade - upgrade existing content files with new prototype files

=head1 SYNOPSIS

    we_content_upgrade [-upgrade] [-v] [-rootdir dir]
         [-template|-prototype dir] contentfile ...

=head1 DESCRIPTION

B<This is very experimentell. First try with backup data!>

Upgrade the named existing content files with new prototype data.

=head1 EXAMPLES

Typical operation: first eye-ball the changes:

    cd .../htdocs/we/I<projectname>_prototypes
    we_content_upgrade -v -rootdir . ../../../we_data/content/*.bin

And then do it:

    we_content_upgrade -upgrade -v -rootdir . ../../../we_data/content/*.bin

=cut