version 1.2, 2000/10/05 22:14:11
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version 1.77, 2008/11/20 15:19:05
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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, |
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# 10/02 Gerd Kortemeyer) |
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# |
# |
# 10/03,10/05 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/ |
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# |
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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 LONCAPA; |
use Apache::lonnet(); |
use Apache::Constants qw(:common :http REDIRECT); |
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use Apache::lonnet; |
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use Apache::loncommon(); |
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 |
sub cleanup { |
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if (tied(%hash)){ |
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&Apache::lonnet::logthis('Cleanup pageflip: hash'); |
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unless (untie(%hash)) { |
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&Apache::lonnet::logthis('Failed cleanup pageflip: hash'); |
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} |
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} |
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return OK; |
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} |
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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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return $current; |
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} |
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sub euclid { |
sub fullmove { |
my ($e,$f)=@_; |
my ($rid,$mapurl,$direction)=@_; |
my $a; my $b; my $r; |
if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'.db', |
if ($e>$f) { $b=$e; $r=$f; } else { $r=$e; $b=$f; } |
&GDBM_READER(),0640)) { |
while ($r!=0) { |
($rid,$mapurl)=&move($rid,$mapurl,$direction); |
$a=$b; $b=$r; |
untie(%hash); |
$r=$a%$b; |
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} |
} |
return $b; |
return($rid,$mapurl); |
} |
} |
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# ------------------------------------------------------------ Build page table |
sub hash_src { |
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my ($id)=@_; |
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my ($mapid,$resid)=split(/\./,$id); |
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my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid}, |
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$resid,$hash{'src_'.$id}); |
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if ($hash{'encrypted_'.$id}) { |
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return (&Apache::lonenc::encrypted($hash{'src_'.$id}), |
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&Apache::lonenc::encrypted($symb)); |
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} |
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return ($hash{'src_'.$id},$symb); |
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} |
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sub move { |
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my ($next,$endupmap,$direction) = @_; |
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my $safecount=0; |
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my $allowed=0; |
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do { |
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($next,$endupmap)=&get_next_possible_move($next,$endupmap,$direction); |
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my $url = $hash{'src_'.$next}; |
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my ($mapid,$resid)=split(/\./,$next); |
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my $symb = &Apache::lonnet::encode_symb($hash{'map_id_'.$mapid}, |
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$resid,$url); |
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if ($url eq '' || $symb eq '') { |
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$allowed = 0; |
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} else { |
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my $priv = &Apache::lonnet::allowed('bre',$url,$symb); |
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$allowed = (($priv eq 'F') || ($priv eq '2')); |
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} |
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$safecount++; |
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} while ( ($next) |
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&& ($next!~/\,/) |
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&& ( |
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(!$hash{'src_'.$next}) |
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|| ( |
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(!$env{'request.role.adv'}) |
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&& $hash{'randomout_'.$next} |
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) |
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|| (!$allowed) |
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) |
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&& ($safecount<10000)); |
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sub tracetable { |
return ($next,$endupmap); |
my ($sofar,$rid,$beenhere)=@_; |
} |
my $further=$sofar; |
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unless ($beenhere=~/\&$rid\&/) { |
sub get_next_possible_move { |
$beenhere.=$rid.'&'; |
my ($rid,$mapurl,$direction)=@_; |
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my $startoutrid=$rid; |
if (defined($hash{'is_map_'.$rid})) { |
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if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) && |
my $next=''; |
(defined($hash{'map_finish_'.$hash{'src_'.$rid}}))) { |
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my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}}; |
my $mincond=1; |
$sofar= |
my $posnext=''; |
&tracetable($sofar,$hash{'map_start_'.$hash{'src_'.$rid}}, |
if ($direction eq 'forward') { |
'&'.$frid.'&'); |
# --------------------------------------------------------------------- Forward |
$sofar++; |
while ($hash{'type_'.$rid} eq 'finish') { |
if ($hash{'src_'.$frid}) { |
$rid=$hash{'ids_'.$hash{'map_id_'.(split(/\./,$rid))[0]}}; |
my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$frid}); |
} |
if (($brepriv eq '2') || ($brepriv eq 'F')) { |
foreach my $id (split(/\,/,$hash{'to_'.$rid})) { |
if (defined($rows[$sofar])) { |
my $condition= $hash{'conditions_'.$hash{'goesto_'.$id}}; |
$rows[$sofar].='&'.$frid; |
my $rescond = &Apache::lonnet::docondval($condition); |
} else { |
my $linkcond = &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$id}}); |
$rows[$sofar]=$frid; |
my $thiscond = ($rescond<$linkcond)?$rescond:$linkcond; |
} |
if ($thiscond>=$mincond) { |
} |
if ($posnext) { |
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$posnext.=','.$id.':'.$thiscond; |
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} else { |
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$posnext=$id.':'.$thiscond; |
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} |
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if ($thiscond>$mincond) { $mincond=$thiscond; } |
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} |
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} |
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foreach my $id (split(/\,/,$posnext)) { |
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my ($linkid,$condval)=split(/\:/,$id); |
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if ($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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} |
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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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foreach my $id (split(/\,/,$hash{'from_'.$rid})) { |
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my $condition= $hash{'conditions_'.$hash{'comesfrom_'.$id}}; |
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my $rescond = &Apache::lonnet::docondval($condition); |
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my $linkcond = &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$id}}); |
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my $thiscond = ($rescond<$linkcond)?$rescond:$linkcond; |
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if ($thiscond>=$mincond) { |
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if ($posnext) { |
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$posnext.=','.$id.':'.$thiscond; |
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} else { |
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$posnext=$id.':'.$thiscond; |
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} |
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if ($thiscond>$mincond) { $mincond=$thiscond; } |
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} |
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} |
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foreach my $id (split(/\,/,$posnext)) { |
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my ($linkid,$condval)=split(/\:/,$id); |
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if ($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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} |
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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(/\./,$next))[0]}; |
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} |
} |
} |
} |
return ($next,$mapurl); |
} else { |
} |
$sofar++; |
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if ($hash{'src_'.$rid}) { |
sub navlaunch { |
my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$rid}); |
my ($r)=@_; |
if (($brepriv eq '2') || ($brepriv eq 'F')) { |
&Apache::loncommon::content_type($r,'text/html'); |
if (defined($rows[$sofar])) { |
&Apache::loncommon::no_cache($r); |
$rows[$sofar].='&'.$rid; |
$r->send_http_header; |
} else { |
$r->print(&Apache::loncommon::start_page('Launched')); |
$rows[$sofar]=$rid; |
$r->print(<<ENDNAV); |
} |
<p><a href="/adm/flip?postdata=firstres%3a">Goto first resource</a></p> |
} |
<script type="text/javascript"> |
} |
function collapse() { |
} |
menu=window.open("/adm/navmaps?collapseExternal","loncapanav", |
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"height=600,width=400,scrollbars=1"); |
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this.document.location='/adm/navmaps?turningOffExternal'; |
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} |
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</script> |
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<p><a href="javascript:collapse();">Collapse external navigation window</a></p> |
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ENDNAV |
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$r->print(&Apache::loncommon::end_page()); |
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} |
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if (defined($hash{'to_'.$rid})) { |
sub first_accessible_resource { |
map { |
my $furl; |
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}); |
$furl=$hash{'first_url'}; |
} |
my %args; |
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my ($url,$args) = split(/\?/,$furl); |
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foreach my $pair (split(/\&/,$args)) { |
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my ($name,$value) = split(/=/,$pair); |
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$args{&unescape($name)} = &unescape($value); |
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} |
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if (!&Apache::lonnet::allowed('bre',$url,$args{'symb'})) { |
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# Wow, we cannot see this ... move forward to the next one that we can see |
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my ($newrid,$newmap)=&move($hash{'first_rid'},$hash{'first_mapurl'},'forward'); |
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# Build the new URL |
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my ($newmapid,$newresid)=split(/\./,$newrid); |
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my $symb=&Apache::lonnet::encode_symb($newmap,$newresid,$hash{'src_'.$newrid}); |
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$furl=&add_get_param($hash{'src_'.$newrid},{ 'symb' => $symb }); |
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if ($hash{'encrypted_'.$newrid}) { |
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$furl=&Apache::lonenc::encrypted($furl); |
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} |
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} |
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untie(%hash); |
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return $furl; |
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} else { |
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return '/adm/navmaps'; |
} |
} |
return $further; |
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} |
} |
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# ================================================================ Main Handler |
# ================================================================ Main Handler |
Line 96 sub handler {
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Line 274 sub handler {
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# ------------------------------------------- Set document type for header only |
# ------------------------------------------- Set document type for header only |
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if ($r->header_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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my %cachehash=(); |
# --------BEGIN DEBUG ONLY TRASH |
my $multichoice=0; |
$r->content_type('text/html'); |
my %multichoicehash=(); |
$r->send_http_header; |
my ($redirecturl,$redirectsymb); |
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my $next=''; |
$r->print('<html><body>'); |
my @possibilities=(); |
# --------END DEBUG ONLY TRASH |
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['postdata']); |
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if (($env{'form.postdata'})&&($env{'request.course.fn'})) { |
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$env{'form.postdata'}=~/(\w+)\:(.*)/; |
if (($ENV{'form.postdata'})&&($ENV{'request.course.fn'})) { |
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$ENV{'form.postdata'}=~/(\w+)\:(.*)/; |
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my $direction=$1; |
my $direction=$1; |
my $currenturl=$2; |
my $currenturl=$2; |
my $redirecturl=$currenturl; |
if ($currenturl=~m|^/enc/|) { |
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$currenturl=&Apache::lonenc::unencrypted($currenturl); |
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} |
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$currenturl=~s/\.\d+\.(\w+)$/\.$1/; |
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if ($direction eq 'firstres') { |
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my $furl=&first_accessible_resource(); |
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&Apache::loncommon::content_type($r,'text/html'); |
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$r->header_out(Location => |
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&Apache::lonnet::absolute_url().$furl); |
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return REDIRECT; |
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} |
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if ($direction eq 'return' || $direction eq 'navlaunch') { |
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# -------------------------------------------------------- Return to last known |
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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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my $newloc; |
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if (($last) && (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'.db', |
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&GDBM_READER(),0640))) { |
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my ($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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$newloc='/adm/navmaps'; |
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} |
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untie %hash; |
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} else { |
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$newloc='/adm/navmaps'; |
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} |
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if ($newloc eq '/adm/navmaps' && $direction eq 'navlaunch') { |
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&navlaunch($r); |
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return OK; |
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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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&Apache::lonnet::absolute_url().$newloc); |
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return REDIRECT; |
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} |
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} |
$currenturl=~s/^http\:\/\///; |
$currenturl=~s/^http\:\/\///; |
$currenturl=~s/^[^\/]+//; |
$currenturl=~s/^[^\/]+//; |
$currenturl=Apache::lonnet::declutter($currenturl); |
# |
# ---------------------------------------------------------------- Tie database |
# Is the current URL on the map? If not, start with last known URL |
if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
# |
&GDBM_READER,0640)) { |
unless (&Apache::lonnet::is_on_map($currenturl)) { |
# ---------------------------------------------- Get ID(s) for current resource |
my $last; |
my $syval=$hash{'ids_/res/'.$currenturl}; |
if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db', |
if ($syval) { |
&GDBM_READER(),0640)) { |
# ------------------------------------------------------------------- Has ID(s) |
$last=$hash{'last_known'}; |
my @possiblities=split(/\,/,$syval); |
untie(%hash); |
$r->print($direction.' '.$currenturl.' '.$syval); |
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} else { |
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# --------------------------------------------------------- Does not have ID(s) |
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$r->print('Weird'); |
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} |
} |
# ------------------------------------- Program needs to get here to untie hash |
if ($last) { |
unless(untie(%hash)) { |
$currenturl=&Apache::lonnet::clutter((&Apache::lonnet::decode_symb($last))[2]); |
$r->log_reason('Could not untie database hash '. |
} else { |
$ENV{'request.course.fn'}.' for '.$ENV{'user.name'}. |
if ($direction eq 'return') { |
' at '.$ENV{'user.domain'}); |
&Apache::loncommon::content_type($r,'text/html'); |
return HTTP_SERVICE_UNAVAILABLE; |
$r->header_out(Location => |
} |
&Apache::lonnet::absolute_url(). |
# ------------------------------------------------------------ Now do something |
'/adm/noidea.html'); |
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return REDIRECT; |
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} else { |
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&navlaunch($r); |
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return OK; |
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} |
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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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# 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,$redirectsymb)=&hash_src($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; |
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foreach my $id (@possibilities) { |
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$multichoicehash{'src_'.$id}=$hash{'src_'.$id}; |
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$multichoicehash{'title_'.$id}=$hash{'title_'.$id}; |
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$multichoicehash{'type_'.$id}=$hash{'type_'.$id}; |
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(my $first, my $second) = $id =~ /(\d+).(\d+)/; |
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my $symbSrc = Apache::lonnet::declutter($hash{'src_'.$id}); |
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$multichoicehash{'symb_'.$id} = |
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Apache::lonnet::declutter($hash{'map_id_'.$first}.'___'. |
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$second.'___'.$symbSrc); |
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my ($choicemap,$choiceres)=split(/\./,$id); |
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my $map=&Apache::lonnet::declutter($hash{'src_'.$choicemap}); |
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my $url=$multichoicehash{'src_'.$id}; |
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$cachehash{$map}{$url}=[$url,$choiceres]; |
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} |
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} |
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} else { |
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# -------------------------------------------------------------- No place to go |
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$multichoice=-1; |
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} |
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# ----------------- The program must come past this point to untie the big hash |
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untie(%hash); |
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# --------------------------------------------------------- Store position info |
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$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\:/)) { |
|
$redirecturl='/adm/email?critical=display'; |
|
$redirectsymb=''; |
|
} |
|
} |
|
&Apache::lonnet::appenv({'user.criticalcheck.time'=>time}); |
|
} |
|
|
|
&Apache::loncommon::content_type($r,'text/html'); |
|
my $url=&Apache::lonnet::absolute_url().$redirecturl; |
|
$url = &add_get_param($url, { 'symb' => $redirectsymb}); |
|
$r->header_out(Location => $url); |
|
return REDIRECT; |
|
} else { |
|
# --------------------------------------------------------- There was a problem |
|
&Apache::loncommon::content_type($r,'text/html'); |
|
$r->send_http_header; |
|
my %lt=&Apache::lonlocal::texthash('title' => 'End of Sequence', |
|
'explain' => |
|
'You have reached the end of the sequence of materials.', |
|
'back' => 'Go Back', |
|
'nav' => 'Navigate Course Content', |
|
'wherenext' => |
|
'There are several possibilities of where to go next', |
|
'pick' => |
|
'Please click on the the resource you intend to access', |
|
'titleheader' => 'Title', |
|
'type' => 'Type'); |
|
if ($#possibilities>0) { |
|
my $start_page= |
|
&Apache::loncommon::start_page('Multiple Resources'); |
|
$r->print(<<ENDSTART); |
|
$start_page |
|
<h3>$lt{'wherenext'}</h3> |
|
<p> |
|
$lt{'pick'}: |
|
<p> |
|
<table border=2> |
|
<tr><th>$lt{'titleheader'}</th><th>$lt{'type'}</th></tr> |
|
ENDSTART |
|
foreach my $id (@possibilities) { |
|
$r->print( |
|
'<tr><td><a href="'. |
|
&add_get_param($multichoicehash{'src_'.$id}, |
|
{'symb' => |
|
$multichoicehash{'symb_'.$id}, |
|
}).'">'. |
|
$multichoicehash{'title_'.$id}. |
|
'</a></td><td>'.$multichoicehash{'type_'.$id}. |
|
'</td></tr>'); |
|
} |
|
$r->print('</table>'); |
|
} else { |
|
my $start_page= |
|
&Apache::loncommon::start_page('No Resource'); |
|
$r->print(<<ENDNONE); |
|
$start_page |
|
<h3>$lt{'title'}</h3> |
|
<p>$lt{'explain'}</p> |
|
ENDNONE |
|
} |
|
$r->print(<<ENDMENU); |
|
<ul> |
|
<li><a href="/adm/flip?postdata=return:">$lt{'back'}</a></li> |
|
<li><a href="/adm/navmaps">$lt{'nav'}</a></li> |
|
</ul> |
|
ENDMENU |
|
$r->print(&Apache::loncommon::end_page()); |
|
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 { |
} else { |
# ----------------------------------------- Serious problem, could not tie hash |
# ---------------------------------------- No, could not determine where we are |
$r->log_reason('Could not tie database hash '. |
$r->internal_redirect('/adm/ambiguous'); |
$ENV{'request.course.fn'}.' for '.$ENV{'user.name'}. |
|
' at '.$ENV{'user.domain'}); |
|
return HTTP_SERVICE_UNAVAILABLE; |
|
} |
} |
# -------------------------- Class was not initialized or page fliped strangely |
|
} else { |
} else { |
$ENV{'user.error.msg'}="/adm/flip:bre:0:0:Choose Course"; |
# -------------------------- Class was not initialized or page fliped strangely |
|
$env{'user.error.msg'}="/adm/flip:bre:0:0:Choose Course"; |
return HTTP_NOT_ACCEPTABLE; |
return HTTP_NOT_ACCEPTABLE; |
} |
} |
|
} |
|
|
|
1; |
|
__END__ |
|
|
|
=pod |
|
|
|
=head1 NAME |
|
|
# ------TRASH BELOW |
Apache::lonpageflip |
# --------------------------- TRASH |
|
|
|
$r->print('</body></html>'); |
=head1 SYNOPSIS |
return OK; |
|
|
|
|
Deals with forward, backward, and other page flips. |
|
|
# ========================================================= TOTAL TRASH |
This is part of the LearningOnline Network with CAPA project |
|
described at http://www.lon-capa.org. |
|
|
my $requrl=$r->uri; |
=head1 OVERVIEW |
# ----------------------------------------------------------------- Tie db file |
|
if ($ENV{'request.course.fn'}) { |
|
my $fn=$ENV{'request.course.fn'}; |
|
if (-e "$fn.db") { |
|
if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER,0640)) { |
|
# ------------------------------------------------------------------- Hash tied |
|
my $firstres=$hash{'map_start_'.$requrl}; |
|
my $lastres=$hash{'map_finish_'.$requrl}; |
|
if (($firstres) && ($lastres)) { |
|
# ----------------------------------------------------------------- Render page |
|
|
|
@rows=(); |
|
|
|
&tracetable(0,$firstres,'&'.$lastres.'&'); |
|
if ($hash{'src_'.$lastres}) { |
|
my $brepriv= |
|
&Apache::lonnet::allowed('bre',$hash{'src_'.$lastres}); |
|
if (($brepriv eq '2') || ($brepriv eq 'F')) { |
|
$rows[$#rows+1]=''.$lastres; |
|
} |
|
} |
|
|
|
# ------------------------------------------------------------ Add to symb list |
(empty) |
|
|
my $i; |
=head1 SUBROUTINES |
my %symbhash=(); |
|
for ($i=0;$i<=$#rows;$i++) { |
|
if ($rows[$i]) { |
|
my @colcont=split(/\&/,$rows[$i]); |
|
map { |
|
$symbhash{$hash{'src_'.$_}}=''; |
|
} @colcont; |
|
} |
|
} |
|
&Apache::lonnet::symblist($requrl,%symbhash); |
|
|
|
# ------------------------------------------------------------------ Page parms |
=over cleanup() |
|
|
my $j; |
=item addrid() |
my $lcm=1; |
|
my $contents=0; |
|
my $nforms=0; |
|
|
|
my %ssibody=(); |
|
my %ssibgcolor=(); |
|
my %ssitext=(); |
|
my %ssilink=(); |
|
my %ssivlink=(); |
|
my %ssialink=(); |
|
my %cellemb=(); |
|
|
|
my $allscript=''; |
|
my $allmeta=''; |
|
|
|
my $isxml=0; |
|
my $xmlheader=''; |
|
my $xmlbody=''; |
|
|
|
# --------------------------------------------- Get SSI output, post parameters |
|
|
|
for ($i=0;$i<=$#rows;$i++) { |
|
if ($rows[$i]) { |
|
$contents++; |
|
my @colcont=split(/\&/,$rows[$i]); |
|
$lcm*=($#colcont+1)/euclid($lcm,($#colcont+1)); |
|
map { |
|
my $src=$hash{'src_'.$_}; |
|
$src=~/\.(\w+)$/; |
|
$cellemb{$_}=Apache::lonnet::fileembstyle($1); |
|
if ($cellemb{$_} eq 'ssi') { |
|
# --------------------------------------------------------- This is an SSI cell |
|
my $prefix=$_.'_'; |
|
my %posthash=('request.prefix' => $prefix); |
|
if (($ENV{'form.'.$prefix.'submit'}) |
|
|| ($ENV{'form.all_submit'})) { |
|
map { |
|
if ($_=~/^form.$prefix/) { |
|
my $name=$_; |
|
$name=~s/^form.$prefix//; |
|
$posthash{$name}=$ENV{$_}; |
|
} |
|
} keys %ENV; |
|
} |
|
my $output=Apache::lonnet::ssi($src,%posthash); |
|
my $parser=HTML::TokeParser->new(\$output); |
|
my $token; |
|
my $bodydef=0; |
|
my $thisxml=0; |
|
if ($output=~/\?xml/) { |
|
$isxml=1; |
|
$thisxml=1; |
|
$output=~ |
|
/((?:\<(?:\?xml|\!DOC|html)[^\>]*(?:\>|\>\]\>)\s*)+)\<body[^\>]*\>/si; |
|
$xmlheader=$1; |
|
} |
|
while (($bodydef==0) && |
|
($token=$parser->get_token)) { |
|
if ($token->[1] eq 'body') { |
|
$bodydef=1; |
|
$ssibgcolor{$_}=$token->[2]->{'bgcolor'}; |
|
$ssitext{$_}=$token->[2]->{'text'}; |
|
$ssilink{$_}=$token->[2]->{'link'}; |
|
$ssivlink{$_}=$token->[2]->{'vlink'}; |
|
$ssialink{$_}=$token->[2]->{'alink'}; |
|
if ($thisxml) { |
|
$xmlbody=$token->[4]; |
|
} |
|
} |
|
if ($token->[1] eq 'meta') { |
|
$allmeta.="\n".$token->[4].'</meta>'; |
|
} |
|
if ($token->[1] eq 'script') { |
|
$allscript.="\n\n" |
|
.$parser->get_text('/script'); |
|
} |
|
} |
|
if ($output=~/\<body[^\>]*\>(.*)/si) { |
|
$output=$1; |
|
} |
|
$output=~s/\<\/body\>.*//si; |
|
if ($output=~/\<form/si) { |
|
$nforms++; |
|
$output=~s/\<form[^\>]*\>//gsi; |
|
$output=~s/\<\/form[^\>]*\>//gsi; |
|
} |
|
$ssibody{$_}=$output; |
|
|
|
# ---------------------------------------------------------------- End SSI cell |
|
} |
|
} @colcont; |
|
} |
|
} |
|
unless ($contents) { |
|
$r->content_type('text/html'); |
|
$r->send_http_header; |
|
$r->print('<html><body>Empty page.</body></html>'); |
|
} else { |
|
# ------------------------------------------------------------------ Build page |
|
|
|
# ---------------------------------------------------------------- Send headers |
=item fullmove() |
if ($isxml) { |
|
$r->content_type('text/xml'); |
|
$r->send_http_header; |
|
$r->print($xmlheader); |
|
} else { |
|
$r->content_type('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->print('<html><body>Page undefined.</body></html>'); |
|
} |
|
# ------------------------------------------------------------------ Untie hash |
|
unless (untie(%hash)) { |
|
&Apache::lonnet::logthis("<font color=blue>WARNING: ". |
|
"Could not untie coursemap $fn (browse).</font>"); |
|
} |
|
# -------------------------------------------------------------------- All done |
|
return OK; |
|
# ----------------------------------------------- Errors, hash could no be tied |
|
} |
|
} |
|
} |
|
$ENV{'user.error.msg'}="$requrl:bre:0:0:Course not initialized"; |
|
return HTTP_NOT_ACCEPTABLE; |
|
} |
|
|
|
1; |
=item hash_src() |
__END__ |
|
|
=item move() |
|
|
|
=item get_next_possible_move() |
|
|
|
=item navlaunch() |
|
|
|
=item first_accessible_resource() |
|
|
|
=item handler() |
|
|
|
=back |
|
|
|
=cut |
|
|
|
|
|
|