=head1 NAME

URI::mailto  # RFC 2368

=cut

package URI::mailto;  # RFC 2368

require URI;
require URI::_query;
@ISA=qw(URI URI::_query);

use strict;

sub to
{
    my $self = shift;
    my @old = $self->headers;
    if (@_) {
	my @new = @old;
	# get rid of any other to: fields
	for (my $i = 0; $i < @new; $i += 2) {
	    if (lc($new[$i] || '') eq "to") {
		splice(@new, $i, 2);
		redo;
	    }
	}

	my $to = shift;
	$to = "" unless defined $to;
	unshift(@new, "to" => $to);
	$self->headers(@new);
    }
    return unless defined wantarray;

    my @to;
    while (@old) {
	my $h = shift @old;
	my $v = shift @old;
	push(@to, $v) if lc($h) eq "to";
    }
    join(",", @to);
}


sub headers
{
    my $self = shift;

    # The trick is to just treat everything as the query string...
    my $opaque = "to=" . $self->opaque;
    $opaque =~ s/\?/&/;

    if (@_) {
	my @new = @_;

	# strip out any "to" fields
	my @to;
	for (my $i=0; $i < @new; $i += 2) {
	    if (lc($new[$i] || '') eq "to") {
		push(@to, (splice(@new, $i, 2))[1]);  # remove header
		redo;
	    }
	}

	my $new = join(",",@to);
	$new =~ s/%/%25/g;
	$new =~ s/\?/%3F/g;
	$self->opaque($new);
	$self->query_form(@new) if @new;
    }
    return unless defined wantarray;

    # I am lazy today...
    URI->new("mailto:?$opaque")->query_form;
}

1;

=head1 COPYRIGHT

=for COPYRIGHT BEGIN

Copyright 2022 University of Southampton.
EPrints 3.4 is supplied by EPrints Services.

http://www.eprints.org/eprints-3.4/

=for COPYRIGHT END

=for LICENSE BEGIN

This file is part of EPrints 3.4 L<http://www.eprints.org/>.

EPrints 3.4 and this file are released under the terms of the
GNU Lesser General Public License version 3 as published by
the Free Software Foundation unless otherwise stated.

EPrints 3.4 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with EPrints 3.4.
If not, see L<http://www.gnu.org/licenses/>.

=for LICENSE END