version 1.4, 2000/10/09 19:37:35
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version 1.80.8.13.2.3, 2023/01/20 23:34:08
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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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# |
# |
# 10/03,10/05,10/06,10/07,10/09 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; |
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use LONCAPA; |
use Apache::Constants qw(:common :http REDIRECT); |
use Apache::Constants qw(:common :http REDIRECT); |
use Apache::lonnet(); |
use Apache::lonnet; |
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use Apache::loncommon(); |
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use Apache::lonnavmaps(); |
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use Apache::lonuserstate; |
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use Apache::lonlocal; |
use HTML::TokeParser; |
use HTML::TokeParser; |
use GDBM_File; |
use GDBM_File; |
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Line 24 use GDBM_File;
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Line 46 use GDBM_File;
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my %hash; |
my %hash; |
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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 { |
sub addrid { |
my ($current,$new,$condid)=@_; |
my ($current,$new,$condid)=@_; |
unless ($condid) { $condid=0; } |
unless ($condid) { $condid=0; } |
if (&Apache::lonnet::allowed('bre',$hash{'src_'.$new})) { |
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if ($current) { |
if ($current) { |
$current.=','.$new.':'.$condid; |
$current.=','.$new; |
} else { |
} else { |
$current=''.$new.':'.$condid; |
$current=''.$new; |
} |
} |
} |
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return $current; |
return $current; |
} |
} |
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sub fullmove { |
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my ($rid,$mapurl,$direction)=@_; |
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if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'.db', |
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&GDBM_READER(),0640)) { |
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($rid,$mapurl)=&move($rid,$mapurl,$direction); |
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untie(%hash); |
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} |
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return($rid,$mapurl); |
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} |
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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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my $anchor; |
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if ($hash{'ext_'.$id} eq 'true:') { |
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if ($hash{'src_'.$id} =~ /(\#.+)$/) { |
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$anchor = $1; |
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} |
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} |
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if ($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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$hash{'encrypted_'.$id},$anchor); |
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} |
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return ($hash{'src_'.$id},$symb,$hash{'encrypted_'.$id},$anchor); |
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} |
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sub move { |
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my ($next,$endupmap,$direction,$firstres) = @_; |
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my $safecount=0; |
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my $allowed=0; |
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my $deeplinkonly=0; |
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my $deeplinkchecked; |
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my $deeplink_login_pc; |
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my $prev=$next; |
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my ($prevmapid)=split(/\./,$next); |
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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 $nodeeplinkcheck = 0; |
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if ($hash{'is_map_'.$next}) { |
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$nodeeplinkcheck = 1; |
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} |
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my $priv = &Apache::lonnet::allowed('bre',$url,$symb,'','','','',$nodeeplinkcheck); |
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$allowed = (($priv eq 'F') || ($priv eq '2') || ($priv eq 'A')); |
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} |
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$deeplinkonly = 0; |
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if ($hash{'deeplinkonly_'.$next}) { |
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my ($value,$level) = map { &unescape($_); } split(/:/,$hash{'deeplinkonly_'.$next}); |
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my ($state,$others,$listed,$scope,$protect) = split(/,/,$value); |
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unless (($state eq 'both') || ($hash{'is_map_'.$next})) { |
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if ($level eq 'resource') { |
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$deeplinkonly = 1; |
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} elsif ($level eq 'map') { |
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if ($scope eq 'rec') { |
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unless ($mapid == $prevmapid) { |
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unless ($deeplinkchecked) { |
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$deeplink_login_pc = &get_deeplink_login_pc(); |
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$deeplinkchecked = 1; |
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} |
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if ($deeplink_login_pc) { |
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my $poss_map_pc; |
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if ($hash{'is_map_'.$next}) { |
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$poss_map_pc = $hash{'map_pc_'.$url}; |
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} else { |
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$poss_map_pc = $hash{'map_pc_'.$hash{'map_id_'.$mapid}}; |
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} |
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unless ($deeplink_login_pc == $poss_map_pc) { |
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unless (grep(/^$deeplink_login_pc$/,split(/,/,$hash{'map_hierarchy_'.$poss_map_pc}))) { |
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$deeplinkonly = 1; |
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} |
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} |
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} else { |
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$deeplinkonly = 1; |
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} |
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} |
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} elsif ($mapid != $prevmapid) { |
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$deeplinkonly = 1; |
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} |
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} |
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} |
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} elsif (($hash{'deeplinkonly_'.$prev}) && (!$firstres)) { |
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my ($value,$level) = map { &unescape($_); } split(/:/,$hash{'deeplinkonly_'.$prev}); |
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my ($state,$others,$listed,$scope,$protect) = split(/,/,$value); |
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unless (($state eq 'both') || ($hash{'is_map_'.$prev})) { |
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if ($level eq 'resource') { |
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$deeplinkonly = 1; |
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} elsif ($level eq 'map') { |
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if ($scope eq 'rec') { |
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unless ($mapid == $prevmapid) { |
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unless ($deeplinkchecked) { |
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$deeplink_login_pc = &get_deeplink_login_pc(); |
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$deeplinkchecked = 1; |
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} |
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if ($deeplink_login_pc) { |
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my $poss_map_pc; |
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if ($hash{'is_map_'.$prev}) { |
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$poss_map_pc = $hash{'map_pc_'.$url}; |
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} else { |
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$poss_map_pc = $hash{'map_pc_'.$hash{'map_id_'.$mapid}}; |
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} |
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unless ($deeplink_login_pc == $poss_map_pc) { |
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unless (grep(/^$deeplink_login_pc$/,split(/,/,$hash{'map_hierarchy_'.$poss_map_pc}))) { |
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$deeplinkonly = 1; |
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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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if ($mapid != $prevmapid) { |
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$deeplinkonly = 1; |
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} |
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} |
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} |
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} |
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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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|| ($deeplinkonly) |
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|| ($hash{'deeplinkout_'.$next})) |
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) |
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|| (!$allowed) |
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) |
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&& ($safecount<10000)); |
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return ($next,$endupmap); |
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} |
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sub get_next_possible_move { |
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my ($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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foreach my $id (split(/\,/,$hash{'to_'.$rid})) { |
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my $condition= $hash{'conditions_'.$hash{'goesto_'.$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{'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(/\./,$next))[0]}; |
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} |
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} |
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return ($next,$mapurl); |
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} |
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sub first_accessible_resource { |
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my $furl; |
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if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'.db', |
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&GDBM_READER(),0640)) { |
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$furl=$hash{'first_url'}; |
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my (%args,$url,$argstr); |
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if ($furl =~ m{^/enc/}) { |
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($url,$argstr) = split(/\?/,&Apache::lonenc::unencrypted($furl)); |
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} else { |
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($url,$argstr) = split(/\?/,$furl); |
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} |
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foreach my $pair (split(/\&/,$argstr)) { |
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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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my $priv = &Apache::lonnet::allowed('bre',$url,$args{'symb'}); |
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my $allowed = (($priv eq 'F') || ($priv eq '2') || ($priv eq 'A')); |
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if (!$allowed) { |
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# Wow, we cannot see this ... move forward to the next one that we can see |
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my ($newrid,$newmap)=&move($hash{'first_rid'},$hash{'first_mapurl'},'forward',1); |
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# Build the new URL |
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if ($newrid eq '') { |
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$furl = '/adm/navmaps'; |
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} else { |
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my ($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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} |
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untie(%hash); |
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return $furl; |
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} else { |
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return '/adm/navmaps'; |
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} |
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} |
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sub check_http_req { |
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my ($srcref,$hostname) = @_; |
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return unless (ref($srcref) eq 'SCALAR'); |
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my $usehttp; |
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if ($env{'request.course.id'}) { |
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my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'}; |
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my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'}; |
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if (($$srcref =~ m{^\Q/public/$cdom/$cnum/syllabus\E($|\?)}) && |
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($ENV{'SERVER_PORT'} == 443) && |
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($env{'course.'.$env{'request.course.id'}.'.externalsyllabus'} =~ m{^http://})) { |
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unless ((&Apache::lonnet::uses_sts()) || |
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(&Apache::lonnet::waf_allssl($hostname))) { |
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$$srcref .= (($$srcref =~/\?/)? '&':'?') . 'usehttp=1'; |
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$usehttp = 1; |
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} |
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} elsif (($$srcref =~ m{^\Q/adm/wrapper/ext/\E(?!https:)}) && |
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($ENV{'SERVER_PORT'} == 443)) { |
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unless ((&Apache::lonnet::uses_sts()) || |
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(&Apache::lonnet::waf_allssl($hostname))) { |
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my ($url,$anchor) = ($$srcref =~ /^([^\#]+)(?:|(\#[^\#]+))$/); |
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$$srcref = $url . (($$srcref =~/\?/)? '&':'?') . 'usehttp=1' .$anchor; |
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$usehttp = 1; |
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} |
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} |
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} |
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return $usehttp; |
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} |
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sub reinited_js { |
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my ($url,$cid,$timeout) = @_; |
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if (!$timeout) { |
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$timeout = 0; |
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} |
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return <<"END"; |
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<script type="text/javascript"> |
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// <![CDATA[ |
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setTimeout(function() { |
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var newurl = '$url'; |
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if (document.getElementById('LC_update_$cid')) { |
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document.getElementById('LC_update_$cid').style.display = 'none'; |
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} |
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if ((newurl !== null) && (newurl !== '') && (newurl !== 'undefined')) { |
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window.location.href = "$url"; |
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} |
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}, $timeout); |
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// ]]> |
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</script> |
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END |
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} |
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sub get_deeplink_login_pc { |
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my $deeplink_login_pc; |
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if (($env{'request.deeplink.login'}) && ($env{'request.course.id'})) { |
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my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'}; |
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my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'}; |
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my $deeplink_symb = &Apache::loncommon::deeplink_login_symb($cnum,$cdom); |
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if ($deeplink_symb) { |
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my $loginmap; |
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if ($deeplink_symb =~ /\.(page|sequence)$/) { |
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$loginmap = &Apache::lonnet::clutter((&Apache::lonnet::decode_symb($deeplink_symb))[2]); |
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} else { |
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$loginmap = &Apache::lonnet::clutter((&Apache::lonnet::decode_symb($deeplink_symb))[0]); |
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} |
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$deeplink_login_pc = $hash{'map_pc_'.$loginmap}; |
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} |
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} |
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return $deeplink_login_pc; |
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} |
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# ================================================================ Main Handler |
# ================================================================ Main Handler |
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sub handler { |
sub handler { |
Line 45 sub handler {
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Line 424 sub handler {
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# ------------------------------------------- Set document type for header only |
# ------------------------------------------- Set document type for header only |
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if ($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=(); |
my %cachehash=(); |
my $redirecturl=''; |
my $multichoice=0; |
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my %multichoicehash=(); |
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my %prog_state=(); |
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my ($redirecturl,$redirectsymb,$enc,$anchor,$deeplinklevel); |
my $next=''; |
my $next=''; |
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my $hostname = $r->hostname(); |
my @possibilities=(); |
my @possibilities=(); |
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&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['postdata']); |
if (($ENV{'form.postdata'})&&($ENV{'request.course.fn'})) { |
if (($env{'form.postdata'})&&($env{'request.course.fn'})) { |
$ENV{'form.postdata'}=~/(\w+)\:(.*)/; |
my ($direction,$currenturl) = ($env{'form.postdata'}=~/(\w+)\:(.*)/); |
my $direction=$1; |
if ($currenturl=~m|^/enc/|) { |
my $currenturl=$2; |
$currenturl=&Apache::lonenc::unencrypted($currenturl); |
my $redirecturl=$currenturl; |
} |
$currenturl=~s/^http\:\/\///; |
$currenturl=~s/\.\d+\.(\w+)$/\.$1/; |
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$currenturl=~s/^https?\:\/\///; |
$currenturl=~s/^[^\/]+//; |
$currenturl=~s/^[^\/]+//; |
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my ($preupdatepos,$last,$reinitcheck); |
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if ($direction eq 'return') { |
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if (tie(%hash,'GDBM_File',$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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} |
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if ($env{'request.course.id'}) { |
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# Check if course needs to be re-initialized |
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my $loncaparev = $r->dir_config('lonVersion'); |
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($reinitcheck,my @reinit) = &Apache::loncommon::needs_coursereinit($loncaparev); |
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if ($reinitcheck eq 'switch') { |
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&Apache::loncommon::content_type($r,'text/html'); |
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$r->send_http_header; |
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$r->print(&Apache::loncommon::check_release_result(@reinit)); |
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return OK; |
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} |
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my ($cnum,$cdom); |
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if ($reinitcheck) { |
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$cnum = $env{'course.'.$env{'request.course.id'}.'.num'}; |
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$cdom = $env{'course.'.$env{'request.course.id'}.'.domain'}; |
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} |
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if (($reinitcheck eq 'main') || ($reinitcheck eq 'both')) { |
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$preupdatepos = &Apache::lonnet::symbread($currenturl); |
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unless ($direction eq 'return') { |
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if (tie(%hash,'GDBM_File',$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); |
|
} |
|
} |
|
&Apache::loncommon::content_type($r,'text/html'); |
|
$r->send_http_header; |
|
$r->print(&Apache::loncommon::start_page('Content Changed')); |
|
my $preamble = '<div id="LC_update_'.$env{'request.course.id'}.'" class="LC_info">'. |
|
'<br />'. |
|
&mt('Your course session is being updated because of recent changes by course personnel.'). |
|
' '.&mt('Please be patient').'.<br /></div>'. |
|
'<div style="padding:0;clear:both;margin:0;border:0"></div>'; |
|
%prog_state = &Apache::lonhtmlcommon::Create_PrgWin($r,undef,$preamble); |
|
&Apache::lonhtmlcommon::Update_PrgWin($r,\%prog_state,&mt('Updating course')); |
|
my ($furl,$ferr) = &Apache::lonuserstate::readmap("$cdom/$cnum"); |
|
&Apache::lonhtmlcommon::Update_PrgWin($r,\%prog_state,&mt('Finished!')); |
|
if ($ferr) { |
|
&Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state); |
|
my $requrl = $r->uri; |
|
$env{'user.error.msg'}="$requrl:bre:0:0:Course not initialized"; |
|
$env{'user.reinit'} = 1; |
|
return HTTP_NOT_ACCEPTABLE; |
|
} else { |
|
if ($last) { |
|
my ($murl,$id,$fn)=&Apache::lonnet::decode_symb($last); |
|
unless (&Apache::lonnet::symbverify($last,$fn)) { |
|
undef($last); |
|
} |
|
} |
|
} |
|
} |
|
if (($reinitcheck eq 'both') || ($reinitcheck eq 'supp')) { |
|
my $possdel; |
|
if ($reinitcheck eq 'supp') { |
|
$possdel = 1; |
|
} |
|
my ($supplemental,$refs_updated) = &Apache::loncommon::get_supplemental($cnum,$cdom,'',$possdel); |
|
unless ($refs_updated) { |
|
&Apache::loncommon::set_supp_httprefs($cnum,$cdom,$supplemental); |
|
} |
|
} |
|
} |
|
if ($direction eq 'firstres') { |
|
my $furl=&first_accessible_resource(); |
|
my $usehttp = &check_http_req(\$furl,$hostname); |
|
if (($usehttp) && ($hostname ne '')) { |
|
$furl='http://'.$hostname.$furl; |
|
} else { |
|
$furl=&Apache::lonnet::absolute_url().$furl; |
|
} |
|
if ($reinitcheck eq 'update') { |
|
&Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state); |
|
$r->print(&reinited_js($furl,$env{'request.course.id'},100)); |
|
$r->print(&Apache::loncommon::end_page()); |
|
return OK; |
|
} else { |
|
&Apache::loncommon::content_type($r,'text/html'); |
|
$r->header_out(Location => $furl); |
|
return REDIRECT; |
|
} |
|
} |
|
if ($direction eq 'return') { |
|
# -------------------------------------------------------- Return to last known |
|
my ($newloc,$usehttp); |
|
if (($last) && (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'.db', |
|
&GDBM_READER(),0640))) { |
|
my ($murl,$id,$fn)=&Apache::lonnet::decode_symb($last); |
|
$id=$hash{'map_pc_'.&Apache::lonnet::clutter($murl)}.'.'.$id; |
|
$newloc=$hash{'src_'.$id}; |
|
if ($newloc) { |
|
$usehttp = &check_http_req(\$newloc,$hostname); |
|
if ($hash{'encrypted_'.$id}) { |
|
$newloc=&Apache::lonenc::encrypted($newloc); |
|
} |
|
if ($newloc =~ m{^(/adm/wrapper/ext/[^\#]+)(?:|(\#[^\#]+))$}) { |
|
my ($url,$anchor) = ($1,$2); |
|
if ($anchor) { |
|
$newloc = $url.(($url=~/\?/)?'&':'?').'symb='.&escape($last).$anchor; |
|
} |
|
} |
|
} else { |
|
$newloc='/adm/navmaps'; |
|
} |
|
untie %hash; |
|
} else { |
|
$newloc='/adm/navmaps'; |
|
} |
|
if (($usehttp) && ($hostname ne '')) { |
|
$newloc='http://'.$hostname.$newloc; |
|
} else { |
|
$newloc=&Apache::lonnet::absolute_url().$newloc |
|
} |
|
if ($reinitcheck eq 'update') { |
|
$r->print(&reinited_js($newloc,$env{'request.course.id'},100)); |
|
$r->print(&Apache::loncommon::end_page()); |
|
return OK; |
|
} else { |
|
&Apache::loncommon::content_type($r,'text/html'); |
|
$r->header_out(Location => $newloc); |
|
return REDIRECT; |
|
} |
|
} |
|
# |
|
# Is the current URL on the map? If not, start with last known URL |
|
# |
|
|
|
unless (&Apache::lonnet::is_on_map($currenturl)) { |
|
if ($preupdatepos) { |
|
undef($preupdatepos); |
|
} elsif (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db', |
|
&GDBM_READER(),0640)) { |
|
$last=$hash{'last_known'}; |
|
untie(%hash); |
|
} |
|
if ($last) { |
|
$currenturl=&Apache::lonnet::clutter((&Apache::lonnet::decode_symb($last))[2]); |
|
} else { |
|
my $newloc = &Apache::lonnet::absolute_url(). |
|
'/adm/navmaps'; |
|
if ($reinitcheck eq 'update') { |
|
&Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state); |
|
$r->print(&reinited_js($newloc,$env{'request.course.id'},100)); |
|
$r->print(&Apache::loncommon::end_page()); |
|
return OK; |
|
} else { |
|
&Apache::loncommon::content_type($r,'text/html'); |
|
$r->header_out(Location => $newloc); |
|
return REDIRECT; |
|
} |
|
} |
|
} |
# ------------------------------------------- Do we have any idea where we are? |
# ------------------------------------------- Do we have any idea where we are? |
my $position; |
my $position; |
if ($position=Apache::lonnet::symbread($currenturl)) { |
if ($preupdatepos) { |
|
$position = $preupdatepos; |
|
} else { |
|
$position=Apache::lonnet::symbread($currenturl); |
|
} |
|
if ($position) { |
# ------------------------------------------------------------------------- Yes |
# ------------------------------------------------------------------------- Yes |
my ($mapurl,$mapnum,$thisurl)=split(/\_\_\_/,$position); |
my ($startoutmap,$mapnum,$thisurl)=&Apache::lonnet::decode_symb($position); |
$cachehash{$thisurl}=$mapnum; |
$cachehash{$startoutmap}{$thisurl}=[$thisurl,$mapnum]; |
if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
$cachehash{$startoutmap}{'last_known'}= |
&GDBM_READER,0640)) { |
[&Apache::lonnet::declutter($currenturl),$mapnum]; |
my $rid=$hash{'map_pc_/res/'.$mapurl}.'.'.$mapnum; |
|
my $next=''; |
# ============================================================ Tie the big hash |
if ($direction eq 'forward') { |
if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'.db', |
map { |
&GDBM_READER(),0640)) { |
$next=&addrid($next,$hash{'goesto_'.$_}, |
my $rid=$hash{'map_pc_'.&Apache::lonnet::clutter($startoutmap)}. |
$hash{'condid_'.$hash{'undercond_'.$_}}); |
'.'.$mapnum; |
} split(/\,/,$hash{'to_'.$rid}); |
|
} elsif ($direction eq 'back') { |
# ------------------------------------------------- Move forward, backward, etc |
map { |
my $endupmap; |
$next=&addrid($next,$hash{'comesfrom_'.$_}, |
($next,$endupmap)=&move($rid,$startoutmap,$direction); |
$hash{'condid_'.$hash{'undercond_'.$_}}); |
# -------------------------------------- Do we have one and only one empty URL? |
} split(/\,/,$hash{'from_'.$rid}); |
# We are now at at least one non-empty URL |
} elsif ($direction eq 'up') { |
|
} elsif ($direction eq 'down') { |
|
} |
|
my $redirectid=''; |
|
# ----------------------------------------------------- Check out possibilities |
# ----------------------------------------------------- Check out possibilities |
if ($next) { |
if ($next) { |
@possibilities=split(/\,/,$next); |
@possibilities=split(/\,/,$next); |
if ($#possibilities==0) { |
if ($#possibilities==0) { |
$redirectid=(split(/\:/,$next))[0]; |
# ---------------------------------------------- Only one possibility, redirect |
|
($redirecturl,$redirectsymb,$enc,$anchor)=&hash_src($next); |
|
$cachehash{$endupmap}{$redirecturl}= |
|
[$redirecturl,(split(/\./,$next))[1]]; |
} else { |
} else { |
|
# ------------------------ There are multiple possibilities for a next resource |
|
$multichoice=1; |
|
foreach my $id (@possibilities) { |
|
$multichoicehash{'src_'.$id}=$hash{'src_'.$id}; |
|
$multichoicehash{'title_'.$id}=$hash{'title_'.$id}; |
|
$multichoicehash{'type_'.$id}=$hash{'type_'.$id}; |
|
(my $first, my $second) = $id =~ /(\d+).(\d+)/; |
|
my $symbSrc = Apache::lonnet::declutter($hash{'src_'.$id}); |
|
$multichoicehash{'symb_'.$id} = |
|
Apache::lonnet::declutter($hash{'map_id_'.$first}.'___'. |
|
$second.'___'.$symbSrc); |
|
|
|
my ($choicemap,$choiceres)=split(/\./,$id); |
|
my $map=&Apache::lonnet::declutter($hash{'src_'.$choicemap}); |
|
my $url=$multichoicehash{'src_'.$id}; |
|
$cachehash{$map}{$url}=[$url,$choiceres]; |
|
} |
|
} |
|
} else { |
|
# -------------------------------------------------------------- No place to go |
|
$multichoice=-1; |
|
if ($position && $env{'request.deeplink.login'}) { |
|
my ($map,$resid,$url) = &Apache::lonnet::decode_symb($position); |
|
my $mapid = $hash{'map_pc_'.&Apache::lonnet::clutter($map)}; |
|
my $position_deeplink = $hash{'deeplinkonly_'.$mapid.'.'.$resid}; |
|
if ($position_deeplink) { |
|
(my $value,$deeplinklevel) = map { &unescape($_); } |
|
split(/:/,$position_deeplink); |
|
} |
} |
} |
} |
|
if ($redirectid) { |
|
$redirecturl=$hash{'src_'.$redirectid}; |
|
} |
} |
|
# ----------------- The program must come past this point to untie the big hash |
untie(%hash); |
untie(%hash); |
|
# --------------------------------------------------------- Store position info |
|
$cachehash{$startoutmap}{'last_direction'}=[$direction,'notasymb']; |
|
foreach my $thismap (keys(%cachehash)) { |
|
my $mapnum=$cachehash{$thismap}->{'mapnum'}; |
|
delete($cachehash{$thismap}->{'mapnum'}); |
|
&Apache::lonnet::symblist($thismap, |
|
%{$cachehash{$thismap}}); |
|
} |
|
# ============================================== Do not return before this line |
if ($redirecturl) { |
if ($redirecturl) { |
$r->content_type('text/html'); |
# ----------------------------------------------------- There is a URL to go to |
$r->header_out(Location => |
if ($direction eq 'forward') { |
'http://'.$ENV{'HTTP_HOST'}.$redirecturl); |
&Apache::lonnet::linklog($currenturl,$redirecturl); |
return REDIRECT; |
} |
|
if ($direction eq 'back') { |
|
&Apache::lonnet::linklog($redirecturl,$currenturl); |
|
} |
|
# ------------------------------------- Check for and display critical messages |
|
my ($redirect, $url) = &Apache::loncommon::critical_redirect(300,'flip'); |
|
unless ($redirect) { |
|
my $usehttp = &check_http_req(\$redirecturl,$hostname); |
|
if (($usehttp) && ($hostname ne '')) { |
|
$url='http://'.$hostname.$redirecturl; |
|
} else { |
|
$url=&Apache::lonnet::absolute_url().$redirecturl; |
|
} |
|
my $addanchor; |
|
if (($anchor ne '') && (!$enc || $env{'request.role.adv'})) { |
|
$addanchor = 1; |
|
$url =~ s/\#.+$//; |
|
} |
|
$url = &add_get_param($url, { 'symb' => $redirectsymb}); |
|
if ($addanchor) { |
|
$url .= $anchor; |
|
} |
|
} |
|
if ($reinitcheck eq 'update') { |
|
&Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state); |
|
$r->print(&reinited_js($url,$env{'request.course.id'},100)); |
|
$r->print(&Apache::loncommon::end_page()); |
|
return OK; |
|
} else { |
|
&Apache::loncommon::content_type($r,'text/html'); |
|
$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', |
|
'deeplink' => 'No link available', |
|
'deeplinkres' => |
|
'Navigation to other content is unavailable when accessing content via deep-linking', |
|
'deeplinkmap' => |
|
'You have reached the end of the sequence of available materials for access via deep-linking', |
|
'explain' => |
|
'You have reached the end of the sequence of materials.', |
|
'back' => 'Go Back', |
|
'nav' => 'Course Contents', |
|
'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', |
|
'update' => 'Content updated', |
|
'expupdate' => 'As a result of a recent update to the sequence of materials, it is not possible to complete the page flip.', |
|
'gonav' => 'Go to the Contents page to select a resource to display.'); |
|
if (&Apache::loncommon::course_type() eq 'Community') { |
|
$lt{'nav'} = &mt('Community Contents'); |
|
} |
|
if ($#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) { |
|
my $src = $multichoicehash{'src_'.$id}; |
|
my $usehttp = &check_http_req(\$src,$hostname); |
|
if (($usehttp) && ($hostname ne '')) { |
|
$src = 'http://'.$hostname.$src; |
|
} |
|
$r->print( |
|
'<tr><td><a href="'. |
|
&add_get_param($src, |
|
{'symb' => |
|
$multichoicehash{'symb_'.$id}, |
|
}).'">'. |
|
$multichoicehash{'title_'.$id}. |
|
'</a></td><td>'.$multichoicehash{'type_'.$id}. |
|
'</td></tr>'); |
|
} |
|
$r->print('</table>'); |
|
} else { |
|
if ($reinitcheck) { |
|
if (&Apache::loncommon::course_type() eq 'Community') { |
|
$r->print( |
|
&Apache::loncommon::start_page('Community Contents Updated')); |
|
} else { |
|
$r->print( |
|
&Apache::loncommon::start_page('Course Contents Updated')); |
|
} |
|
$r->print('<h2>'.$lt{'update'}.'</h2>' |
|
.'<p>'.$lt{'expupdate'}.'<br />' |
|
.$lt{'gonav'}.'</p>'); |
|
} else { |
|
$r->print( |
|
&Apache::loncommon::start_page('No Resource')); |
|
if ($deeplinklevel eq 'resource') { |
|
$r->print('<h2>'.$lt{'deeplink'}.'</h2>' |
|
.'<p>'.$lt{'deeplinkres'}.'</p>'); |
|
} elsif ($deeplinklevel eq 'map') { |
|
$r->print('<h2>'.$lt{'title'}.'</h2>' |
|
.'<p>'.$lt{'deeplinkmap'}.'</p>'); |
|
} else { |
|
$r->print('<h2>'.$lt{'title'}.'</h2>' |
|
.'<p>'.$lt{'explain'}.'</p>'); |
|
} |
|
} |
|
} |
|
if ($deeplinklevel) { |
|
$r->print( |
|
&Apache::lonhtmlcommon::actionbox( |
|
['<a href="/adm/flip?postdata=return:">'.$lt{'back'}.'</a>'])); |
|
} elsif ((!@possibilities) && ($reinitcheck)) { |
|
$r->print( |
|
&Apache::lonhtmlcommon::actionbox( |
|
['<a href="/adm/navmaps">'.$lt{'nav'}.'</a></li>' |
|
])); |
|
} else { |
|
$r->print( |
|
&Apache::lonhtmlcommon::actionbox( |
|
['<a href="/adm/flip?postdata=return:">'.$lt{'back'}.'</a></li>', |
|
'<a href="/adm/navmaps">'.$lt{'nav'}.'</a></li>' |
|
])); |
|
} |
|
$r->print(&Apache::loncommon::end_page()); |
|
|
|
return OK; |
|
} |
|
} else { |
|
# ------------------------------------------------- Problem, could not tie hash |
|
if ($reinitcheck eq 'update') { |
|
&Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state); |
|
$r->print(&Apache::loncommon::end_page()); |
} |
} |
|
$env{'user.error.msg'}="/adm/flip:bre:0:1:Course Data Missing"; |
|
return HTTP_NOT_ACCEPTABLE; |
} |
} |
|
} else { |
|
# ---------------------------------------- No, could not determine where we are |
|
my $newloc = '/adm/ambiguous'; |
|
if ($reinitcheck eq 'update') { |
|
&Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state); |
|
$r->print(&reinited_js($newloc,$env{'request.course.id'},100)); |
|
$r->print(&Apache::loncommon::end_page()); |
|
} else { |
|
$r->internal_redirect($newloc); |
|
} |
|
return OK; |
} |
} |
# -------------------------------------------------------- No, could not decide |
|
} |
|
$r->content_type('text/html'); |
|
$r->send_http_header; |
|
|
|
$r->print('<html><body>'); |
|
|
|
# -------------------------- 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 |
|
|
|
$r->print('</body></html>'); |
=head1 SYNOPSIS |
return OK; |
|
|
|
|
Deals with forward, backward, and other page flips. |
|
|
# ========================================================= TOTAL TRASH |
This is part of the LearningOnline Network with CAPA project |
|
described at http://www.lon-capa.org. |
|
|
# &Apache::lonnet::symblist($requrl,%symbhash); |
=head1 OVERVIEW |
|
|
} |
(empty) |
|
|
1; |
=head1 SUBROUTINES |
__END__ |
|
|
=over cleanup() |
|
|
|
=item addrid() |
|
|
|
=item fullmove() |
|
|
|
=item hash_src() |
|
|
|
=item move() |
|
|
|
=item get_next_possible_move() |
|
|
|
=item first_accessible_resource() |
|
|
|
=item handler() |
|
|
|
=back |
|
|
|
=cut |
|
|
|
|
|
|