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package PSP::Pile;
# Copyright (c) 2000, FundsXpress Financial Network, Inc.
# This library is free software released under the GNU Lesser General
# Public License, Version 2.1. Please read the important licensing and
# disclaimer information included below.
# $Id: Pile.pm,v 1.1.1.2 2003/12/06 19:47:26 hartmans Exp $
use strict;
=head1 NAME
PSP::Pile - an base object which maintains a collection of page methods.
=head1 SYNOPSIS
=head1 DESCRIPTION
=cut
use CGI;
use URI::Escape;
use PSP::Utils qw(dump_object
path_to_page_name
page_name_to_path
reduce_url);
use PSP::Page;
use vars qw(@ISA);
@ISA = qw(PSP::Page);
=head1 METHODS
=head2 loader
instance
(Loader) loader ([Loader $loader])
DESCRIPTION:
Accessor method to possibly store, then retrieve the Loader object.
=cut
sub loader {
my ($this,$loader) = @_;
defined $loader and $this->{loader} = $loader;
return $this->{loader};
}
sub basepile_loader {
my ($this) = @_;
my $loader = $this->loader() or return;
my $parent = $loader->parent() or return;
while ($parent->parent()) {
$loader = $parent;
$parent = $parent->parent();
}
return $loader;
}
sub page_url {
my ($this,$n_to_skip) = @_;
my $loader = $this->loader();
my $url = $loader->url($n_to_skip)."/".page_name_to_path($this->page_name());
$url = reduce_url($url);
return $url;
}
sub is_subpile {
my ($this) = @_;
if (my $loader = $this->loader()) {
if (my $parent = $loader->parent()) {
# if we have a grand-parent, we're a subpile.
if ($parent->parent()) {
return 1;
}
}
}
return 0;
}
sub page_not_found {
my ($this,$page_name) = @_;
$this->header(status => "404 Page Not Found");
my $url = $this->page_url(0);
my $cgi = $this->cgi();
my $out = "";
$out .=<<eohtml;
<html>
<head>
<title> Not Found </title>
</head>
<body>
<h1> Not Found </h1>
<p>
The URL you referenced: $url was not found.<br>
<p>
If not, there was probably an error on our part. Please
email us and explain how
you reached this screen so we can fix the problem. We apologize for the
inconvenience.
</p>
</body>
</html>
eohtml
# '
return $out;
}
sub goto_page {
my ($this,$page_url) = @_;
my ($page_name,$pile);
if (substr($page_url,0,1) eq '/') {
# if an absolute path is given, it is with respect to the base pile
# get the loader of the base pile.
my $loader = $this->basepile_loader() or throw
Error::Simple("Could not determine base loader.");
# rebless $this to be its base pile.
ref($this) ne $loader->class_name() and
bless $this, $loader->class_name();
# map the page_url to some pile and page_name.
($pile,$page_name) = $loader->map_page($this,$page_url);
$pile or throw Error::Simple("'$page_url' does not map to a pile?!?\n");
} else {
# otherwise, it is with respect to the current pile.
$pile = $this;
# get the path to the current page.
my $url = page_name_to_path($pile->page_name());
# remove the trailing component from path.
$url =~ s!(/?)[^/]+/?$!$1!;
# append new page_url to this path.
$url .= $page_url;
# reduce ".."-related aspects of url.
$url = reduce_url($url);
# convert and set the pile's current page_name.
$page_name = $pile->page_name($url);
}
# if this method is not available, return the output of page_not_found().
$pile->can($page_name) or
return $pile->page_not_found($page_name);
# call the pile method.
return $pile->$page_name();
}
sub link_page {
my ($this,$page_url) = @_;
my $url;
if (substr($page_url,0,1) eq '/') {
$url = $this->url().$page_url;
} else {
# get the path to the current page.
$url = $this->page_url();
# remove the trailing component from path.
$url =~ s![^/]+/?$!$1!;
# append new page_url to this path.
$url .= $page_url;
}
# reduce the url.
$url = reduce_url($url);
# return the url.
return $url;
}
sub redirect_page {
my ($this,$page_url,$time) = @_;
$time ||= 15;
my $url;
if (substr($page_url,0,1) eq '/') {
$url = $this->url().$page_url;
} else {
# get the path to the current page.
$url = $this->page_url();
# remove the trailing component from path.
$url =~ s!(/?)[^/]+/?$!$1!;
# append new page_url to this path.
$url = $page_url;
}
# reduce the url.
$url = reduce_url($url);
return $this->header("refresh", "$time;URL=$url");
}
sub error_page {
my ($this) = @_;
return("<h2>An unknown error has occurred.</h2>\n");
}
=head2 free_internals
instance
() free_internals ()
DESCRIPTION:
A method to remove internal references to avoid circular references.
=cut
sub free_internals {
my ($this) = @_;
delete $this->{loader};
$this->SUPER::free_internals();
return;
}
1;
__END__
=head1 BUGS
No known bugs, but this does not mean no bugs exist.
=head1 SEE ALSO
L<CGI>, L<PSP::Utils>
=head1 COPYRIGHT
PSP - Perl Server Pages
Copyright (c) 2000, FundsXpress Financial Network, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
BECAUSE THIS LIBRARY IS LICENSED FREE OF CHARGE, THIS LIBRARY IS
BEING PROVIDED "AS IS WITH ALL FAULTS," WITHOUT ANY WARRANTIES
OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, WITHOUT
LIMITATION, ANY IMPLIED WARRANTIES OF TITLE, NONINFRINGEMENT,
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, AND THE
ENTIRE RISK AS TO SATISFACTORY QUALITY, PERFORMANCE, ACCURACY,
AND EFFORT IS WITH THE YOU. 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 this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
=cut
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