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lib/Alvis/Document/Links.pm  view on Meta::CPAN

package Alvis::Document::Links;

########################################################################
#
# Storage class for link information
#
#   -- Kimmo Valtonen
#
########################################################################

use strict;
use warnings;

use Carp;
use Data::Dumper;

use strict;

#########################################################################

my ($ERR_OK,
    $ERR_NO_URL,
    $ERR_NO_TYPE
    )=(0..2);

my %ErrMsgs=($ERR_OK=>"",
	     $ERR_NO_URL=>"It would be nice if a URL actually pointed " .
	     "at something.",
	     $ERR_NO_TYPE=>"No type given."
	     );

sub new
{
    my $proto=shift;
 
    my $class=ref($proto)||$proto;
    my $parent=ref($proto)&&$proto;
    my $self={};
    bless($self,$class);

    $self->_set_err_state($ERR_OK);

    $self->_init(@_);

    return $self;
}

sub _init
{
    my $self=shift;

    if (defined(@_))
    {
        my %args=@_;
        @$self{ keys %args }=values(%args);
    }

}

sub _set_err_state
{
    my $self=shift;
    my $errcode=shift;
    my $errmsg=shift;

    if (!defined($errcode))
    {
	confess("set_err_state() called with an undefined argument.");
    }

    if (exists($ErrMsgs{$errcode}))
    {
	if ($errcode==$ERR_OK)
	{
	    $self->{errstr}="";
	}
	else
	{
	    $self->{errstr}.=" " . $ErrMsgs{$errcode};
	    if (defined($errmsg))
	    {
		$self->{errstr}.=" " . $errmsg;
	    }
	}
    }
    else
    {
	confess("Internal error: set_err_state() called with an " .
		"unrecognized argument ($errcode).")
    }
}

sub errmsg
{
    my $self=shift;
    
    return $self->{errstr};
}