version 1.1, 2000/10/03 20:33:06
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version 1.52, 2005/03/01 00:22:57
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# |
# |
# Page flip handler |
# Page flip handler |
# |
# |
# (Page Handler |
# $Id$ |
# |
# |
# (TeX Content Handler |
# Copyright Michigan State University Board of Trustees |
# |
# |
# 05/29/00,05/30 Gerd Kortemeyer) |
# This file is part of the LearningOnline Network with CAPA (LON-CAPA). |
# 08/30,08/31,09/06,09/14,09/15,09/16,09/19,09/20,09/21,09/23, |
# |
# 10/02 Gerd Kortemeyer) |
# LON-CAPA is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2 of the License, or |
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# (at your option) any later version. |
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# |
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# LON-CAPA is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with LON-CAPA; if not, write to the Free Software |
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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# |
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# /home/httpd/html/adm/gpl.txt |
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# |
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# http://www.lon-capa.org/ |
# |
# |
# 10/03 Gerd Kortemeyer |
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package Apache::lonpageflip; |
package Apache::lonpageflip; |
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use strict; |
use strict; |
use Apache::Constants qw(:common :http); |
use Apache::Constants qw(:common :http REDIRECT); |
use Apache::lonnet(); |
use Apache::lonnet(); |
use HTML::TokeParser; |
use HTML::TokeParser; |
use GDBM_File; |
use GDBM_File; |
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# -------------------------------------------------------------- Module Globals |
# ========================================================== Module Global Hash |
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my %hash; |
my %hash; |
my @rows; |
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# ------------------------------------------------------------------ Euclid gcd |
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sub euclid { |
sub cleanup { |
my ($e,$f)=@_; |
if (tied(%hash)){ |
my $a; my $b; my $r; |
&Apache::lonnet::logthis('Cleanup pageflip: hash'); |
if ($e>$f) { $b=$e; $r=$f; } else { $r=$e; $b=$f; } |
unless (untie(%hash)) { |
while ($r!=0) { |
&Apache::lonnet::logthis('Failed cleanup pageflip: hash'); |
$a=$b; $b=$r; |
} |
$r=$a%$b; |
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} |
} |
return $b; |
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} |
} |
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# ------------------------------------------------------------ Build page table |
sub addrid { |
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my ($current,$new,$condid)=@_; |
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unless ($condid) { $condid=0; } |
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if ($current) { |
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$current.=','.$new; |
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} else { |
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$current=''.$new; |
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} |
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sub tracetable { |
return $current; |
my ($sofar,$rid,$beenhere)=@_; |
} |
my $further=$sofar; |
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unless ($beenhere=~/\&$rid\&/) { |
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$beenhere.=$rid.'&'; |
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if (defined($hash{'is_map_'.$rid})) { |
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if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) && |
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(defined($hash{'map_finish_'.$hash{'src_'.$rid}}))) { |
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my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}}; |
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$sofar= |
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&tracetable($sofar,$hash{'map_start_'.$hash{'src_'.$rid}}, |
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'&'.$frid.'&'); |
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$sofar++; |
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if ($hash{'src_'.$frid}) { |
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my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$frid}); |
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if (($brepriv eq '2') || ($brepriv eq 'F')) { |
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if (defined($rows[$sofar])) { |
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$rows[$sofar].='&'.$frid; |
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} else { |
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$rows[$sofar]=$frid; |
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} |
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} |
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} |
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} |
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} else { |
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$sofar++; |
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if ($hash{'src_'.$rid}) { |
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my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$rid}); |
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if (($brepriv eq '2') || ($brepriv eq 'F')) { |
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if (defined($rows[$sofar])) { |
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$rows[$sofar].='&'.$rid; |
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} else { |
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$rows[$sofar]=$rid; |
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} |
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} |
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} |
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} |
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if (defined($hash{'to_'.$rid})) { |
sub fullmove { |
map { |
my ($rid,$mapurl,$direction)=@_; |
my $now=&tracetable($sofar,$hash{'goesto_'.$_},$beenhere); |
if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
if ($now>$further) { $further=$now; } |
&GDBM_READER(),0640)) { |
} split(/\,/,$hash{'to_'.$rid}); |
($rid,$mapurl)=&move($rid,$mapurl,$direction); |
} |
untie(%hash); |
} |
} |
return $further; |
return($rid,$mapurl); |
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} |
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sub hash_src { |
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my ($id)=@_; |
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if ($hash{'encrypted_'.$id}) { |
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return &Apache::lonenc::encrypted($hash{'src_'.$id}); |
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} |
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return $hash{'src_'.$id}; |
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} |
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sub move { |
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my ($rid,$mapurl,$direction)=@_; |
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my $startoutrid=$rid; |
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my $next=''; |
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my $mincond=1; |
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my $posnext=''; |
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if ($direction eq 'forward') { |
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# --------------------------------------------------------------------- Forward |
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while ($hash{'type_'.$rid} eq 'finish') { |
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$rid=$hash{'ids_'.$hash{'map_id_'.(split(/\./,$rid))[0]}}; |
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} |
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map { |
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my $thiscond= |
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&Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}}); |
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if ($thiscond>=$mincond) { |
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if ($posnext) { |
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$posnext.=','.$_.':'.$thiscond; |
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} else { |
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$posnext=$_.':'.$thiscond; |
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} |
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if ($thiscond>$mincond) { $mincond=$thiscond; } |
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} |
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} split(/\,/,$hash{'to_'.$rid}); |
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map { |
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my ($linkid,$condval)=split(/\:/,$_); |
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if ($condval>=$mincond) { |
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$next=&addrid($next,$hash{'goesto_'.$linkid}, |
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$hash{'condid_'.$hash{'undercond_'.$linkid}}); |
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} |
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} split(/\,/,$posnext); |
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if ($hash{'is_map_'.$next}) { |
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# This jumps to the beginning of a new map (going down level) |
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if ( |
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$hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$next}}} eq 'sequence') { |
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$mapurl=$hash{'src_'.$next}; |
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$next=$hash{'map_start_'.$hash{'src_'.$next}}; |
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} elsif ( |
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# This jumps back up from an empty sequence, to a page up one level |
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$hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$next}}} eq 'page') { |
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$mapurl=$hash{'map_id_'.(split(/\./,$next))[0]}; |
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} |
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} elsif |
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((split(/\./,$startoutrid))[0]!=(split(/\./,$next))[0]) { |
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# This comes up from a map (coming up one level); |
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$mapurl=$hash{'map_id_'.(split(/\./,$next))[0]}; |
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} |
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} elsif ($direction eq 'back') { |
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# ------------------------------------------------------------------- Backwards |
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while ($hash{'type_'.$rid} eq 'start') { |
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$rid=$hash{'ids_'.$hash{'map_id_'.(split(/\./,$rid))[0]}}; |
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} |
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map { |
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my $thiscond= |
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&Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}}); |
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if ($thiscond>=$mincond) { |
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if ($posnext) { |
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$posnext.=','.$_.':'.$thiscond; |
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} else { |
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$posnext=$_.':'.$thiscond; |
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} |
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if ($thiscond>$mincond) { $mincond=$thiscond; } |
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} |
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} split(/\,/,$hash{'from_'.$rid}); |
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map { |
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my ($linkid,$condval)=split(/\:/,$_); |
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if ($condval>=$mincond) { |
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$next=&addrid($next,$hash{'comesfrom_'.$linkid}, |
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$hash{'condid_'.$hash{'undercond_'.$linkid}}); |
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} |
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} split(/\,/,$posnext); |
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if ($hash{'is_map_'.$next}) { |
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# This jumps to the end of a new map (going down one level) |
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if ( |
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$hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$next}}} eq 'sequence') { |
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$mapurl=$hash{'src_'.$next}; |
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$next=$hash{'map_finish_'.$hash{'src_'.$next}}; |
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} elsif ( |
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$hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$next}}} eq 'page') { |
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# This jumps back up from an empty sequence, to a page up one level |
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$mapurl=$hash{'map_id_'.(split(/\./,$next))[0]}; |
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} |
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} elsif |
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((split(/\./,$startoutrid))[0]!=(split(/\./,$next))[0]) { |
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# This comes back up from a map (going up one level); |
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$mapurl=$hash{'map_id_'.(split(/\./,$next))[0]}; |
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} |
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} |
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return ($next,$mapurl); |
} |
} |
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# ================================================================ Main Handler |
# ================================================================ Main Handler |
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sub handler { |
sub handler { |
my $r=shift; |
my $r=shift; |
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# ------------------------------------------- Set document type for header only |
# ------------------------------------------- Set document type for header only |
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# if ($r->headers_only) { |
if ($r->header_only) { |
$r->content_type('text/html'); |
&Apache::loncommon::content_type($r,'text/html'); |
$r->send_http_header; |
$r->send_http_header; |
# return OK; |
return OK; |
# } |
} |
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$r->print('<html><body>'.$ENV{'form.postdata'}.'</body></html>'); |
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return OK; |
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my $requrl=$r->uri; |
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# ----------------------------------------------------------------- Tie db file |
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if ($ENV{'request.course.fn'}) { |
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my $fn=$ENV{'request.course.fn'}; |
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if (-e "$fn.db") { |
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if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER,0640)) { |
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# ------------------------------------------------------------------- Hash tied |
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my $firstres=$hash{'map_start_'.$requrl}; |
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my $lastres=$hash{'map_finish_'.$requrl}; |
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if (($firstres) && ($lastres)) { |
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# ----------------------------------------------------------------- Render page |
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@rows=(); |
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&tracetable(0,$firstres,'&'.$lastres.'&'); |
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if ($hash{'src_'.$lastres}) { |
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my $brepriv= |
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&Apache::lonnet::allowed('bre',$hash{'src_'.$lastres}); |
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if (($brepriv eq '2') || ($brepriv eq 'F')) { |
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$rows[$#rows+1]=''.$lastres; |
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} |
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} |
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# ------------------------------------------------------------ Add to symb list |
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my $i; |
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my %symbhash=(); |
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for ($i=0;$i<=$#rows;$i++) { |
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if ($rows[$i]) { |
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my @colcont=split(/\&/,$rows[$i]); |
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map { |
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$symbhash{$hash{'src_'.$_}}=''; |
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} @colcont; |
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} |
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} |
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&Apache::lonnet::symblist($requrl,%symbhash); |
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# ------------------------------------------------------------------ Page parms |
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my $j; |
my %cachehash=(); |
my $lcm=1; |
my $multichoice=0; |
my $contents=0; |
my %multichoicehash=(); |
my $nforms=0; |
my $redirecturl=''; |
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my $next=''; |
my %ssibody=(); |
my @possibilities=(); |
my %ssibgcolor=(); |
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['postdata']); |
my %ssitext=(); |
if (($ENV{'form.postdata'})&&($ENV{'request.course.fn'})) { |
my %ssilink=(); |
$ENV{'form.postdata'}=~/(\w+)\:(.*)/; |
my %ssivlink=(); |
my $direction=$1; |
my %ssialink=(); |
my $currenturl=$2; |
my %cellemb=(); |
if ($currenturl=~m|^/enc/|) { |
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$currenturl=&Apache::lonenc::unencrypted($currenturl); |
my $allscript=''; |
} |
my $allmeta=''; |
$currenturl=~s/\.\d+\.(\w+)$/\.$1/; |
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if ($direction eq 'return') { |
my $isxml=0; |
# -------------------------------------------------------- Return to last known |
my $xmlheader=''; |
my $last; |
my $xmlbody=''; |
if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db', |
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&GDBM_READER(),0640)) { |
# --------------------------------------------- Get SSI output, post parameters |
$last=$hash{'last_known'}; |
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untie(%hash); |
for ($i=0;$i<=$#rows;$i++) { |
} |
if ($rows[$i]) { |
my $newloc; |
$contents++; |
if (($last) && (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
my @colcont=split(/\&/,$rows[$i]); |
&GDBM_READER(),0640))) { |
$lcm*=($#colcont+1)/euclid($lcm,($#colcont+1)); |
my ($murl,$id,$fn)=&Apache::lonnet::decode_symb($last); |
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$id=$hash{'map_pc_'.&Apache::lonnet::clutter($murl)}.'.'.$id; |
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$newloc=$hash{'src_'.$id}; |
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if ($newloc) { |
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if ($hash{'encrypted_'.$id}) { $newloc=&Apache::lonenc::encrypted($newloc); } |
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} else { |
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$newloc='/adm/noidea.html'; |
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} |
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untie %hash; |
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} else { |
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$newloc='/adm/noidea.html'; |
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} |
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&Apache::loncommon::content_type($r,'text/html'); |
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$r->header_out(Location => |
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'http://'.$ENV{'HTTP_HOST'}.$newloc); |
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return REDIRECT; |
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} |
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$currenturl=~s/^http\:\/\///; |
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$currenturl=~s/^[^\/]+//; |
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# |
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# Is the current URL on the map? If not, start with last known URL |
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# |
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unless (&Apache::lonnet::is_on_map($currenturl)) { |
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my $last; |
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if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db', |
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&GDBM_READER(),0640)) { |
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$last=$hash{'last_known'}; |
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untie(%hash); |
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} |
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if ($last) { |
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$currenturl=&Apache::lonnet::clutter((&Apache::lonnet::decode_symb($last))[2]); |
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} else { |
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&Apache::loncommon::content_type($r,'text/html'); |
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$r->header_out(Location => |
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'http://'.$ENV{'HTTP_HOST'}.'/adm/noidea.html'); |
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return REDIRECT; |
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} |
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} |
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# ------------------------------------------- Do we have any idea where we are? |
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my $position; |
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if ($position=Apache::lonnet::symbread($currenturl)) { |
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# ------------------------------------------------------------------------- Yes |
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my ($startoutmap,$mapnum,$thisurl)=&Apache::lonnet::decode_symb($position); |
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$cachehash{$startoutmap}{$thisurl}=[$thisurl,$mapnum]; |
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$cachehash{$startoutmap}{'last_known'}= |
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[&Apache::lonnet::declutter($currenturl),$mapnum]; |
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# ============================================================ Tie the big hash |
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if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
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&GDBM_READER(),0640)) { |
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my $rid=$hash{'map_pc_'.&Apache::lonnet::clutter($startoutmap)}. |
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'.'.$mapnum; |
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# ------------------------------------------------- Move forward, backward, etc |
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my $endupmap; |
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($next,$endupmap)=&move($rid,$startoutmap,$direction); |
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# -------------------------------------- Do we have one and only one empty URL? |
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my $safecount=0; |
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while (($next) && ($next!~/\,/) && |
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((!$hash{'src_'.$next}) || |
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((!$ENV{'request.role.adv'}) && $hash{'randomout_'.$next})) |
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&& ($safecount<10000)) { |
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($next,$endupmap)=&move($next,$endupmap,$direction); |
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$safecount++; |
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} |
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# We are now at at least one non-empty URL |
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# ----------------------------------------------------- Check out possibilities |
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if ($next) { |
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@possibilities=split(/\,/,$next); |
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if ($#possibilities==0) { |
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# ---------------------------------------------- Only one possibility, redirect |
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$redirecturl=&hash_src($next); |
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$cachehash{$endupmap}{$redirecturl}= |
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[$redirecturl,(split(/\./,$next))[1]]; |
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} else { |
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# ------------------------ There are multiple possibilities for a next resource |
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$multichoice=1; |
map { |
map { |
my $src=$hash{'src_'.$_}; |
$multichoicehash{'src_'.$_}=$hash{'src_'.$_}; |
$src=~/\.(\w+)$/; |
$multichoicehash{'title_'.$_}=$hash{'title_'.$_}; |
$cellemb{$_}=Apache::lonnet::fileembstyle($1); |
$multichoicehash{'type_'.$_}=$hash{'type_'.$_}; |
if ($cellemb{$_} eq 'ssi') { |
(my $first, my $second) = $_ =~ /(\d+).(\d+)/; |
# --------------------------------------------------------- This is an SSI cell |
my $symbSrc = Apache::lonnet::declutter($hash{'src_'.$_}); |
my $prefix=$_.'_'; |
$multichoicehash{'symb_'.$_} = |
my %posthash=('request.prefix' => $prefix); |
Apache::lonnet::declutter($hash{'map_id_'.$first}.'___'. |
if (($ENV{'form.'.$prefix.'submit'}) |
$second.'___'.$symbSrc); |
|| ($ENV{'form.all_submit'})) { |
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map { |
my ($choicemap,$choiceres)=split(/\./,$_); |
if ($_=~/^form.$prefix/) { |
my $map=&Apache::lonnet::declutter($hash{'src_'.$choicemap}); |
my $name=$_; |
my $url=$multichoicehash{'src_'.$_}; |
$name=~s/^form.$prefix//; |
$cachehash{$map}{$url}=[$url,$choiceres]; |
$posthash{$name}=$ENV{$_}; |
} @possibilities; |
} |
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} keys %ENV; |
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} |
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my $output=Apache::lonnet::ssi($src,%posthash); |
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my $parser=HTML::TokeParser->new(\$output); |
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my $token; |
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my $bodydef=0; |
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my $thisxml=0; |
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if ($output=~/\?xml/) { |
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$isxml=1; |
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$thisxml=1; |
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$output=~ |
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/((?:\<(?:\?xml|\!DOC|html)[^\>]*(?:\>|\>\]\>)\s*)+)\<body[^\>]*\>/si; |
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$xmlheader=$1; |
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} |
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while (($bodydef==0) && |
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($token=$parser->get_token)) { |
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if ($token->[1] eq 'body') { |
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$bodydef=1; |
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$ssibgcolor{$_}=$token->[2]->{'bgcolor'}; |
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$ssitext{$_}=$token->[2]->{'text'}; |
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$ssilink{$_}=$token->[2]->{'link'}; |
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$ssivlink{$_}=$token->[2]->{'vlink'}; |
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$ssialink{$_}=$token->[2]->{'alink'}; |
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if ($thisxml) { |
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$xmlbody=$token->[4]; |
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} |
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} |
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if ($token->[1] eq 'meta') { |
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$allmeta.="\n".$token->[4].'</meta>'; |
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} |
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if ($token->[1] eq 'script') { |
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$allscript.="\n\n" |
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.$parser->get_text('/script'); |
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} |
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} |
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if ($output=~/\<body[^\>]*\>(.*)/si) { |
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$output=$1; |
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} |
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$output=~s/\<\/body\>.*//si; |
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if ($output=~/\<form/si) { |
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$nforms++; |
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$output=~s/\<form[^\>]*\>//gsi; |
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$output=~s/\<\/form[^\>]*\>//gsi; |
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} |
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$ssibody{$_}=$output; |
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# ---------------------------------------------------------------- End SSI cell |
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} |
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} @colcont; |
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} |
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} |
} |
unless ($contents) { |
} else { |
$r->content_type('text/html'); |
# -------------------------------------------------------------- No place to go |
$r->send_http_header; |
$multichoice=-1; |
$r->print('<html><body>Empty page.</body></html>'); |
} |
} else { |
# ----------------- The program must come past this point to untie the big hash |
# ------------------------------------------------------------------ Build page |
untie(%hash); |
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# --------------------------------------------------------- Store position info |
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$cachehash{$startoutmap}{'last_direction'}=[$direction,'notasymb']; |
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foreach my $thismap (keys %cachehash) { |
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my $mapnum=$cachehash{$thismap}->{'mapnum'}; |
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delete($cachehash{$thismap}->{'mapnum'}); |
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&Apache::lonnet::symblist($thismap, |
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%{$cachehash{$thismap}}); |
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} |
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# ============================================== Do not return before this line |
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if ($redirecturl) { |
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# ----------------------------------------------------- There is a URL to go to |
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if ($direction eq 'forward') { |
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&Apache::lonnet::linklog($currenturl,$redirecturl); |
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} |
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if ($direction eq 'back') { |
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&Apache::lonnet::linklog($redirecturl,$currenturl); |
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} |
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# ------------------------------------------------- Check for critical messages |
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if ((time-$ENV{'user.criticalcheck.time'})>300) { |
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my @what=&Apache::lonnet::dump |
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('critical',$ENV{'user.domain'}, |
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$ENV{'user.name'}); |
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if ($what[0]) { |
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if (($what[0] ne 'con_lost') && |
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($what[0]!~/^error\:/)) { |
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$redirecturl='/adm/email?critical=display'; |
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} |
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} |
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&Apache::lonnet::appenv('user.criticalcheck.time'=>time); |
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} |
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# ---------------------------------------------------------------- Send headers |
&Apache::loncommon::content_type($r,'text/html'); |
if ($isxml) { |
$r->header_out(Location => |
$r->content_type('text/xml'); |
'http://'.$ENV{'HTTP_HOST'}.$redirecturl); |
$r->send_http_header; |
return REDIRECT; |
$r->print($xmlheader); |
} else { |
} else { |
# --------------------------------------------------------- There was a problem |
$r->content_type('text/html'); |
&Apache::loncommon::content_type($r,'text/html'); |
$r->send_http_header; |
|
$r->print('<html>'); |
|
} |
|
# ------------------------------------------------------------------------ Head |
|
$r->print("\n<head>\n".$allmeta); |
|
if ($allscript) { |
|
$r->print("\n<script>\n".$allscript."\n</script>\n"); |
|
} |
|
$r->print("\n</head>\n"); |
|
# ------------------------------------------------------------------ Start body |
|
if ($isxml) { |
|
$r->print($xmlbody); |
|
} else { |
|
$r->print('<body bgcolor="#FFFFFF">'); |
|
} |
|
# ------------------------------------------------------------------ Start form |
|
if ($nforms) { |
|
$r->print('<form method="post" action="'. |
|
$requrl.'">'); |
|
} |
|
# ----------------------------------------------------------------- Start table |
|
$r->print('<table cols="'.$lcm.'" border="0">'); |
|
for ($i=0;$i<=$#rows;$i++) { |
|
if ($rows[$i]) { |
|
$r->print("\n<tr>"); |
|
my @colcont=split(/\&/,$rows[$i]); |
|
my $avespan=$lcm/($#colcont+1); |
|
for ($j=0;$j<=$#colcont;$j++) { |
|
my $rid=$colcont[$j]; |
|
$r->print('<td colspan="'.$avespan.'"'); |
|
if ($cellemb{$rid} eq 'ssi') { |
|
if ($ssibgcolor{$rid}) { |
|
$r->print(' bgcolor="'. |
|
$ssibgcolor{$rid}.'"'); |
|
} |
|
$r->print('><font'); |
|
if ($ssitext{$rid}) { |
|
$r->print(' text="'.$ssitext{$rid}.'"'); |
|
} |
|
if ($ssilink{$rid}) { |
|
$r->print(' link="'.$ssilink{$rid}.'"'); |
|
} |
|
if ($ssitext{$rid}) { |
|
$r->print(' vlink="'.$ssivlink{$rid}.'"'); |
|
} |
|
if ($ssialink{$rid}) { |
|
$r->print(' alink="'.$ssialink{$rid}.'"'); |
|
} |
|
|
|
$r->print('>'.$ssibody{$rid}.'</font>'); |
|
} elsif ($cellemb{$rid} eq 'img') { |
|
$r->print('><img src="'. |
|
$hash{'src_'.$rid}.'"></img>'); |
|
} |
|
$r->print('</td>'); |
|
} |
|
$r->print('</tr>'); |
|
} |
|
} |
|
$r->print("\n</table>"); |
|
# ---------------------------------------------------------------- Submit, etc. |
|
if ($nforms) { |
|
$r->print( |
|
'<input name="all_submit" value="Submit All" type="'. |
|
(($nforms>1)?'submit':'hidden').'"></input></form>'); |
|
} |
|
$r->print('</body></html>'); |
|
# -------------------------------------------------------------------- End page |
|
} |
|
# ------------------------------------------------------------- End render page |
|
} else { |
|
$r->content_type('text/html'); |
|
$r->send_http_header; |
$r->send_http_header; |
$r->print('<html><body>Page undefined.</body></html>'); |
if ($#possibilities>0) { |
} |
my $bodytag= |
# ------------------------------------------------------------------ Untie hash |
&Apache::loncommon::bodytag('Multiple Resources'); |
unless (untie(%hash)) { |
$r->print(<<ENDSTART); |
&Apache::lonnet::logthis("<font color=blue>WARNING: ". |
<head><title>Choose Next Location</title></head> |
"Could not untie coursemap $fn (browse).</font>"); |
$bodytag |
} |
<h3>There are several possibilities of where to go next</h3> |
# -------------------------------------------------------------------- All done |
<p> |
return OK; |
Please click on the the resource you intend to access: |
# ----------------------------------------------- Errors, hash could no be tied |
<p> |
|
<table border=2> |
|
<tr><th>Title</th><th>Type</th></tr> |
|
ENDSTART |
|
foreach (@possibilities) { |
|
$r->print( |
|
'<tr><td><a href="'. |
|
$multichoicehash{'src_'.$_}.'?symb=' . |
|
Apache::lonnet::escape($multichoicehash{'symb_'.$_}).'">'. |
|
$multichoicehash{'title_'.$_}. |
|
'</a></td><td>'.$multichoicehash{'type_'.$_}. |
|
'</td></tr>'); |
|
} |
|
$r->print('</table></body></html>'); |
|
return OK; |
|
} else { |
|
my $bodytag=&Apache::loncommon::bodytag('No Resource'); |
|
$r->print(<<ENDNONE); |
|
<head><title>No Resource</title></head> |
|
$bodytag |
|
<h3>Next resource could not be identified.</h3> |
|
<p>You probably are at the <b>beginning</b> or the <b>end</b> of the |
|
course.</p> |
|
<ul> |
|
<li><a href="/adm/flip?postdata=return:">Go Back</a></li> |
|
<li><a href="/adm/navmaps">Navigate Course Content</a></li> |
|
</ul> |
|
</body> |
|
</html> |
|
ENDNONE |
|
return OK; |
|
} |
|
} |
|
} else { |
|
# ------------------------------------------------- Problem, could not tie hash |
|
$ENV{'user.error.msg'}="/adm/flip:bre:0:1:Course Data Missing"; |
|
return HTTP_NOT_ACCEPTABLE; |
} |
} |
} |
} else { |
} |
# ---------------------------------------- No, could not determine where we are |
$ENV{'user.error.msg'}="$requrl:bre:0:0:Course not initialized"; |
if ( &Apache::lonnet::mod_perl_version() == 2 ) { |
return HTTP_NOT_ACCEPTABLE; |
&Apache::lonnet::cleanenv(); |
|
} |
|
$r->internal_redirect('/adm/ambiguous'); |
|
} |
|
} else { |
|
# -------------------------- Class was not initialized or page fliped strangely |
|
$ENV{'user.error.msg'}="/adm/flip:bre:0:0:Choose Course"; |
|
return HTTP_NOT_ACCEPTABLE; |
|
} |
} |
} |
|
|
1; |
1; |