ljr/local/htdocs/export_comments.bml

<?_code
{
    use strict;
    use vars qw(%GET);
    
    my $req = shift;
    my $r = $req->{'r'};

    my $remote = LJ::get_remote();
    return "<?needlogin?>" unless $remote;

    my $authas = $GET{'authas'} || $remote->{'user'};
    my $u = LJ::get_authas_user($authas);
    return LJ::bad_input($ML{'error.invalidauth'}) unless $u;

    my @errors = ();

    my $dbcr = LJ::get_cluster_reader($u);
    push @errors, $ML{'error.nodb'} unless $dbcr;

    # don't let people hit us with silly GET attacks
    push @errors, "This page can't be viewed except via POST."
        if BML::get_client_header('Referer') && !LJ::did_post();

    my $mode = $GET{get};
    push @errors, "Invalid mode."
        unless $mode =~ m/^comment_(?:meta|body)$/;

    # error stuff
    return LJ::bad_input(@errors) if @errors;

    # from now on, we manage our own output
    BML::suppress_headers();
    BML::suppress_content();

    # print top
    $r->content_type("text/xml; charset=utf-8");
    $r->send_http_header();
    $r->print("<?xml version=\"1.0\" encoding='utf-8'?>\n<livejournal>\n");

    # startid specified?
    my $gather = $mode eq 'comment_meta' ? 10000 : 1000;
    my $startid = $GET{startid}+0;
    my $endid = $startid + $gather;

    # get metadata
    my $rows = $dbcr->selectall_arrayref('SELECT jtalkid, nodeid, parenttalkid, posterid, state, datepost ' .
                                         "FROM talk2 WHERE nodetype = 'L' AND journalid = ? AND " .
                                         "                 jtalkid >= $startid AND jtalkid < $endid",
                                         undef, $u->{userid});

    # now let's gather them all together while making a list of posterids
    my %posterids;
    my %comments;
    foreach my $r (@{$rows || []}) {
        $comments{$r->[0]} = {
            nodeid => $r->[1],
            parenttalkid => $r->[2],
            posterid => $r->[3],
            state => $r->[4],
            datepost => $r->[5],
        };
        $posterids{$r->[3]} = 1 if $r->[3]; # don't include 0 (anonymous)
    }

    # now we have two choices: comments themselves or metadata
    if ($mode eq 'comment_meta') {
        # meta data is easy :)
        my $max = $dbcr->selectrow_array('SELECT MAX(jtalkid) FROM talk2 ' .
                                        "WHERE journalid = ? AND nodetype = 'L'",
                                        undef, $u->{userid});
        $max += 0;
        $r->print("<maxid>$max</maxid>\n");

        # load posterids
        my $us = LJ::load_userids(keys %posterids);

        # now spit out the metadata
        $r->print("<comments>\n");
        while (my ($id, $data) = each %comments) {
            my $ret = "<comment id='$id'";
            $ret .= " posterid='$data->{posterid}'" if $data->{posterid};
            $ret .= " state='$data->{state}'" if $data->{state} ne 'A';
            $ret .= " />\n";
            $r->print($ret);
        }
        $r->print("</comments>\n<usermaps>\n");

        # now spit out usermap
        my $ret = '';
        while (my ($id, $user) = each %$us) {
            $ret .= "<usermap id='$id' user='$user->{user}' />\n";
        }
        $r->print($ret);
        $r->print("</usermaps>\n");

    # comment data also presented in glorious XML:
    } elsif ($mode eq 'comment_body') {
        # get real comments from startid to a limit of 10k data, however far that takes us
        my @ids = sort { $a <=> $b } keys %comments;

        # call a load to get comment text
        my $texts = LJ::get_talktext2($u, @ids);

        # get props if we need to
        my $props = {};
        if ($GET{'props'}) {
            LJ::load_talk_props2($u, \@ids, $props);
        }

        # now start spitting out data
        $r->print("<comments>\n");
        foreach my $id (@ids) {
            # get text for this comment
            my $data = $comments{$id};
            my $text = $texts->{$id};
            my ($subject, $body) = @{$text || []};

            # only spit out valid UTF8, and make sure it fits in XML, and uncompress it
            LJ::text_uncompress(\$body);
            LJ::text_out(\$subject);
            LJ::text_out(\$body);
            $subject = LJ::exml($subject);
            $body = LJ::exml($body);

            # setup the date to be GMT and formatted per W3C specs
            my $date = LJ::mysqldate_to_time($data->{datepost});
            $date = LJ::time_to_w3c($date, 'Z');

            # print the data
            my $ret = "<comment id='$id' jitemid='$data->{nodeid}'";
            $ret .= " posterid='$data->{posterid}'" if $data->{posterid};
            $ret .= " state='$data->{state}'" if $data->{state} ne 'A';
            $ret .= " parentid='$data->{parenttalkid}'" if $data->{parenttalkid};
            if ($data->{state} eq 'D') {
                $ret .= " />\n";
            } else {
                $ret .= ">\n";
                $ret .= "<subject>$subject</subject>\n" if $subject;
                $ret .= "<body>$body</body>\n" if $body;
                $ret .= "<date>$date</date>\n";
                foreach my $propkey (keys %{$props->{$id} || {}}) {
                    $ret .= "<property name='$propkey'>";
                    $ret .= LJ::exml($props->{$id}->{$propkey});
                    $ret .= "</property>\n";
                }
                $ret .= "</comment>\n";
            }
            $r->print($ret);
        }
        $r->print("</comments>\n");
    }

    # all done
    $r->print("</livejournal>\n");
}
_code?><?_c <LJDEP>
</LJDEP> _c?>