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File: mt-db2sql.cgi
#!/usr/local/bin/perl -w
# Copyright 2001-2004 Six Apart. This code cannot be redistributed without
# permission from www.movabletype.org.
#
# $Id: mt-db2sql.cgi,v 1.18 2004/09/29 21:33:03 ezra Exp $
use strict;

my($MT_DIR);
BEGIN {
    if ($0 =~ m!(.*[/\\])!) {
        $MT_DIR = $1;
    } else {
        $MT_DIR = './';
    }
    unshift @INC, $MT_DIR . 'lib';
    unshift @INC, $MT_DIR . 'extlib';
}

local $| = 1;
print "Content-Type: text/html\n\n";
print "<pre>\n\n";

my @CLASSES = qw( MT::Author MT::Blog MT::Category MT::Comment MT::Entry
                  MT::IPBanList MT::Log MT::Notification MT::Permission
                  MT::Placement MT::Template MT::TemplateMap MT::Trackback
                  MT::TBPing );

use File::Spec;

eval {
    local $SIG{__WARN__} = sub { print "**** WARNING: $_[0]\n" };

    require MT;
    my $mt = MT->new( Config => $MT_DIR . 'mt.cfg', Directory => $MT_DIR )
        or die MT->errstr;

    require MT::Object;
    my($type) = $mt->{cfg}->ObjectDriver =~ /^DBI::(.*)$/;
    MT::Object->set_driver('DBI::' . $type)
        or die MT::ObjectDriver->errstr;
    my $dbh = MT::Object->driver->{dbh};
    my $schema = File::Spec->catfile($MT_DIR, 'schemas', $type . '.dump');
    open FH, $schema or die "Can't open schema file '$schema': $!";
    my $ddl;
    { local $/; $ddl = <FH> }
    close FH;
    my @stmts = split /;/, $ddl;
    print "Loading database schema...\n\n";
    for my $stmt (@stmts) {
        $stmt =~ s!^\s*!!;
        $stmt =~ s!\s*$!!;
        next unless $stmt =~ /\S/;
        $dbh->do($stmt) or die $dbh->errstr;
    }

    ## %ids will hold the highest IDs of each class.
    my %ids;

    print "Loading data...\n";
    for my $class (@CLASSES) {
        print $class, "\n";
        MT::Object->set_driver('DBM');
        eval "use $class";
        my $iter = $class->load_iter;

        my %names;

        MT::Object->set_driver('DBI::' . $type);
        while (my $obj = $iter->()) {
            print "    ", $obj->id, "\n";
            $ids{$class} = $obj->id
                if !$ids{$class} || $obj->id > $ids{$class};
            ## Look for duplicate template, category, and author names,
            ## because we have uniqueness constraints in the DB.
            if ($class eq 'MT::Template') {
                my $key = lc($obj->name) . $obj->blog_id;
                if ($names{$class}{$key}++) {
                    print "        Found duplicate template name '" .
                          $obj->name;
                    $obj->name($obj->name . ' ' . $names{$class}{$key});
                    print "'; renaming to '" . $obj->name . "'\n";
                }
                ## Touch the text column to make sure we read in
                ## any linked templates.
                my $text = $obj->text;
            } elsif ($class eq 'MT::Author') {
                my $key = lc($obj->name);
                if ($names{$class . $obj->type}{$key}++) {
                    print "        Found duplicate author name '" .
                          $obj->name;
                    $obj->name($obj->name . ' ' . $names{$class}{$key});
                    print "'; renaming to '" . $obj->name . "'\n";
                }
                $obj->email('') unless defined $obj->email;
                $obj->set_password('') unless defined $obj->password;
            } elsif ($class eq 'MT::Category') {
                my $key = lc($obj->label) . $obj->blog_id;
                if ($names{$class}{$key}++) {
                    print "        Found duplicate category label '" .
                          $obj->label;
                    $obj->label($obj->label . ' ' . $names{$class}{$key});
                    print "'; renaming to '" . $obj->label . "'\n";
                }
            } elsif ($class eq 'MT::Trackback') {
                $obj->entry_id(0) unless defined $obj->entry_id;
                $obj->category_id(0) unless defined $obj->category_id;
            } elsif ($class eq 'MT::Entry') {
                $obj->allow_pings(0)
                    if defined $obj->allow_pings && $obj->allow_pings eq '';
                $obj->allow_comments(0)
                    if defined $obj->allow_comments && $obj->allow_comments eq '';
            }
            $obj->save
                or die $obj->errstr;
        }
        print "\n";
    }

    if ($type eq 'postgres') {
        print "Updating sequences\n";
        my $dbh = MT::Object->driver->{dbh};
        for my $class (keys %ids) {
            print "    $class => $ids{$class}\n";
            my $seq = 'mt_' . $class->datasource . '_' .
                      $class->properties->{primary_key};
            $dbh->do("select setval('$seq', $ids{$class})")
                or die $dbh->errstr;
        }
    }
};
if ($@) {
    print <<HTML;

An error occurred while loading data:

$@

HTML
} else {
    print <<HTML;

Done copying data from Berkeley DB to your SQL database! All went well.

HTML
}

print "</pre>\n";