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version 1.8, 2000/09/04 17:17:51
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version 1.156, 2018/03/29 21:12:57
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| # The LearningOnline Network with CAPA |
# The LearningOnline Network with CAPA |
| # Construct and maintain state and binary representation of course for user |
# Construct and maintain state and binary representation of course for user |
| # |
# |
| # (Server for RAT Maps |
# $Id$ |
| # |
# |
| # (Edit Handler for RAT Maps |
# Copyright Michigan State University Board of Trustees |
| # (TeX Content Handler |
|
| # |
# |
| # 05/29/00,05/30 Gerd Kortemeyer) |
# This file is part of the LearningOnline Network with CAPA (LON-CAPA). |
| # 7/1 Gerd Kortemeyer) |
|
| # 7/1,7/3,7/4,7/7,7/8,7/10 Gerd Kortemeyer) |
|
| # |
# |
| # 7/15,7/17,7/18,8/1,8/2,8/4,8/5,8/21,8/22,8/23,8/30,9/2,9/4 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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### |
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|
| package Apache::lonuserstate; |
package Apache::lonuserstate; |
| |
|
| |
# ------------------------------------------------- modules used by this module |
| use strict; |
use strict; |
| use Apache::Constants qw(:common :http); |
|
| use Apache::File; |
|
| use HTML::TokeParser; |
use HTML::TokeParser; |
| use Apache::lonnet(); |
use Apache::lonnet; |
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use Apache::lonlocal; |
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use Apache::loncommon(); |
| use GDBM_File; |
use GDBM_File; |
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use Apache::lonmsg; |
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use Safe; |
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use Safe::Hole; |
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use Opcode; |
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use Apache::lonenc; |
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use Fcntl qw(:flock); |
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use LONCAPA qw(:DEFAULT :match); |
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use File::Basename; |
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|
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|
| |
|
| # ---------------------------------------------------- Globals for this package |
# ---------------------------------------------------- Globals for this package |
| |
|
| my $pc; # Package counter |
my $pc; # Package counter is this what 'Guts' calls the map counter? |
| my %hash; # The big tied hash |
my %hash; # The big tied hash |
| |
my %parmhash;# The hash with the parameters |
| my @cond; # Array with all of the conditions |
my @cond; # Array with all of the conditions |
| my $errtext; # variable with all errors |
my $errtext; # variable with all errors |
| |
my $retfrid; # variable with the very first RID in the course |
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my $retfurl; # first URL |
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my %randompick; # randomly picked resources |
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my %randompickseed; # optional seed for randomly picking resources |
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my %randomorder; # maps to order contents randomly |
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my %randomizationcode; # code used to grade folder for bubblesheet exam |
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my %encurl; # URLs in this folder are supposed to be encrypted |
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my %hiddenurl; # this URL (or complete folder) is supposed to be hidden |
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my %rescount; # count of unhidden items in each map |
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my %mapcount; # count of unhidden maps in each map |
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|
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# ----------------------------------- Remove version from URL and store in hash |
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|
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sub versionerror { |
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my ($uri,$usedversion,$unusedversion)=@_; |
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return '<br />'.&mt('Version discrepancy: resource [_1] included in both version [_2] and version [_3]. Using version [_2].', |
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$uri,$usedversion,$unusedversion).'<br />'; |
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} |
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|
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# Removes the version number from a URI and returns the resulting |
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# URI (e.g. mumbly.version.stuff => mumbly.stuff). |
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# |
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# If the URI has not been seen with a versio before the |
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# hash{'version_'.resultingURI} is set to the version number. |
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# If the URI has been seen and the version does not match and error |
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# is added to the error string. |
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# |
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# Parameters: |
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# URI potentially with a version. |
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# Returns: |
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# URI with the version cut out. |
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# See above for side effects. |
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# |
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|
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sub versiontrack { |
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my $uri=shift; |
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if ($uri=~/\.(\d+)\.\w+$/) { |
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my $version=$1; |
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$uri=~s/\.\d+\.(\w+)$/\.$1/; |
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unless ($hash{'version_'.$uri}) { |
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$hash{'version_'.$uri}=$version; |
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} elsif ($version!=$hash{'version_'.$uri}) { |
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$errtext.=&versionerror($uri,$hash{'version_'.$uri},$version); |
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} |
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} |
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return $uri; |
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} |
| |
|
| # --------------------------------------------------------- Loads map from disk |
# -------------------------------------------------------------- Put in version |
| |
|
| sub loadmap { |
sub putinversion { |
| my $uri=shift; |
my $uri=shift; |
| if ($hash{'map_pc_'.$uri}) { return OK; } |
my $key=$env{'request.course.id'}.'_'.&Apache::lonnet::clutter($uri); |
| |
if ($hash{'version_'.$uri}) { |
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my $version=$hash{'version_'.$uri}; |
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if ($version eq 'mostrecent') { return $uri; } |
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if ($version eq &Apache::lonnet::getversion( |
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&Apache::lonnet::filelocation('',$uri))) |
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{ return $uri; } |
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$uri=~s/\.(\w+)$/\.$version\.$1/; |
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} |
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&Apache::lonnet::do_cache_new('courseresversion',$key,&Apache::lonnet::declutter($uri),600); |
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return $uri; |
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} |
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|
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# ----------------------------------------- Processing versions file for course |
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|
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sub processversionfile { |
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my %cenv=@_; |
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my %versions=&Apache::lonnet::dump('resourceversions', |
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$cenv{'domain'}, |
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$cenv{'num'}); |
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foreach my $ver (keys(%versions)) { |
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if ($ver=~/^error\:/) { return; } |
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$hash{'version_'.$ver}=$versions{$ver}; |
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} |
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} |
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|
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# --------------------------------------------------------- Loads from disk |
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|
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|
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# |
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# Loads a map file. |
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# Note that this may implicitly recurse via parse_resource if one of the resources |
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# is itself composed. |
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# |
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# Parameters: |
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# uri - URI of the map file. |
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# parent_rid - Resource id in the map of the parent resource (0.0 for the top level map) |
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# courseid - Course id for the course for which the map is being loaded |
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# |
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sub loadmap { |
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my ($uri,$parent_rid,$courseid)=@_; |
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|
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# Is the map already included? |
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|
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if ($hash{'map_pc_'.$uri}) { |
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$errtext.='<p class="LC_error">'. |
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&mt('Multiple use of sequence/page [_1]! The course will not function properly.','<tt>'.$uri.'</tt>'). |
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'</p>'; |
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return; |
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} |
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# Register the resource in it's map_pc_ [for the URL] |
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# map_id.nnn is the nesting level -> to the URI. |
| |
|
| $pc++; |
$pc++; |
| my $lpc=$pc; |
my $lpc=$pc; |
| $hash{'map_pc_'.$uri}=$lpc; |
$hash{'map_pc_'.$uri}=$lpc; |
| $hash{'map_id_'.$lpc}=$uri; |
$hash{'map_id_'.$lpc}=$uri; |
| |
|
| my $fn='/home/httpd/html'.$uri; |
# If the parent is of the form n.m hang this map underneath it in the |
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# map hierarchy. |
| |
|
| unless (($fn=~/\.course$/) || |
if ($parent_rid =~ /^(\d+)\.\d+$/) { |
| ($fn=~/\.sequence$/) || |
my $parent_pc = $1; |
| ($fn=~/\.page$/)) { |
if (defined($hash{'map_hierarchy_'.$parent_pc})) { |
| $errtext.="Invalid map: $fn\n"; |
$hash{'map_hierarchy_'.$lpc}=$hash{'map_hierarchy_'.$parent_pc}.','. |
| return OK; |
$parent_pc; |
| } |
} else { |
| |
$hash{'map_hierarchy_'.$lpc}=$parent_pc; |
| unless (-e $fn) { |
} |
| my $returned=Apache::lonnet::repcopy($fn); |
|
| unless ($returned eq OK) { |
|
| $errtext.="Could not import: $fn - "; |
|
| if ($returned eq HTTP_SERVICE_UNAVAILABLE) { |
|
| $errtext.="Server unavailable\n"; |
|
| } |
|
| if ($returned eq HTTP_NOT_FOUND) { |
|
| $errtext.="File not found\n"; |
|
| } |
|
| if ($returned eq FORBIDDEN) { |
|
| $errtext.="Access forbidden\n"; |
|
| } |
|
| return OK; |
|
| } |
|
| } |
} |
| |
|
| if (-e $fn) { |
# Determine and check filename of the sequence we need to read: |
| my @content; |
|
| { |
|
| my $fh=Apache::File->new($fn); |
|
| @content=<$fh>; |
|
| } |
|
| my $instr=join('',@content); |
|
| my $parser = HTML::TokeParser->new(\$instr); |
|
| my $token; |
|
| |
|
| my $linkpc=0; |
my $fn=&Apache::lonnet::filelocation('',&putinversion($uri)); |
| |
|
| $fn=~/\.(\w+)$/; |
my $ispage=($fn=~/\.page$/); |
| |
|
| $hash{'map_type_'.$lpc}=$1; |
# We can only nest sequences or pages. Anything else is an illegal nest. |
| |
|
| while ($token = $parser->get_token) { |
unless (($fn=~/\.sequence$/) || $ispage) { |
| if ($token->[0] eq 'S') { |
$errtext.='<br />'.&mt('Invalid map: [_1]',"<tt>$fn</tt>"); |
| if ($token->[1] eq 'resource') { |
return; |
| # -------------------------------------------------------------------- Resource |
} |
| |
|
| my $rid=$lpc.'.'.$token->[2]->{'id'}; |
# Read the XML that constitutes the file. |
| |
|
| $hash{'kind_'.$rid}='res'; |
my $instr=&Apache::lonnet::getfile($fn); |
| $hash{'title_'.$rid}=$token->[2]->{'title'}; |
|
| my $turi=$token->[2]->{'src'}; |
|
| $hash{'src_'.$rid}=$turi; |
|
| |
|
| if (defined($hash{'ids_'.$turi})) { |
if ($instr eq -1) { |
| $hash{'ids_'.$turi}.=','.$rid; |
$errtext.= '<br />' |
| } else { |
.&mt('Map not loaded: The file [_1] does not exist.', |
| $hash{'ids_'.$turi}=''.$rid; |
"<tt>$fn</tt>"); |
| } |
return; |
| |
} |
| |
|
| if ($token->[2]->{'src'}=~/\/\//) { |
# Successfully got file, parse it |
| $hash{'ext_'.$rid}='true:'; |
|
| } else { |
|
| $hash{'ext_'.$rid}='false:'; |
|
| } |
|
| if ($token->[2]->{'type'}) { |
|
| $hash{'type_'.$rid}=$token->[2]->{'type'}; |
|
| if ($token->[2]->{'type'} eq 'start') { |
|
| $hash{'map_start_'.$uri}="$rid"; |
|
| } |
|
| if ($token->[2]->{'type'} eq 'finish') { |
|
| $hash{'map_finish_'.$uri}="$rid"; |
|
| } |
|
| } else { |
|
| $hash{'type_'.$rid}='normal'; |
|
| } |
|
| |
|
| if (($turi=~/\.course$/) || |
# parse for parameter processing. |
| ($turi=~/\.sequence$/) || |
# Note that these are <param... / > tags |
| ($turi=~/\.page$/)) { |
# so we only care about 'S' (tag start) nodes. |
| $hash{'is_map_'.$rid}=1; |
|
| &loadmap($turi); |
|
| } |
|
| |
|
| } elsif ($token->[1] eq 'condition') { |
|
| # ------------------------------------------------------------------- Condition |
|
| |
|
| my $rid=$lpc.'.'.$token->[2]->{'id'}; |
|
| |
|
| $hash{'kind_'.$rid}='cond'; |
my $parser = HTML::TokeParser->new(\$instr); |
| $cond[$#cond+1]=$token->[2]->{'value'}; |
$parser->attr_encoded(1); |
| $hash{'condid_'.$rid}=$#cond; |
|
| if ($token->[2]->{'type'}) { |
|
| $cond[$#cond].=':'.$token->[2]->{'type'}; |
|
| } else { |
|
| $cond[$#cond].=':normal'; |
|
| } |
|
| |
|
| } elsif ($token->[1] eq 'link') { |
# first get all parameters |
| # ----------------------------------------------------------------------- Links |
|
| |
|
| $linkpc++; |
|
| my $linkid=$lpc.'.'.$linkpc; |
|
| |
|
| my $goesto=$lpc.'.'.$token->[2]->{'to'}; |
while (my $token = $parser->get_token) { |
| my $comesfrom=$lpc.'.'.$token->[2]->{'from'}; |
next if ($token->[0] ne 'S'); |
| my $undercond=0; |
if ($token->[1] eq 'param') { |
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&parse_param($token,$lpc); |
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} |
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} |
| |
|
| if ($token->[2]->{'condition'}) { |
# Get set to take another pass through the XML: |
| $undercond=$lpc.'.'.$token->[2]->{'condition'}; |
# for resources and links. |
| } |
|
| |
|
| $hash{'goesto_'.$linkid}=$goesto; |
$parser = HTML::TokeParser->new(\$instr); |
| $hash{'comesfrom_'.$linkid}=$comesfrom; |
$parser->attr_encoded(1); |
| $hash{'undercond_'.$linkid}=$undercond; |
|
| |
|
| if (defined($hash{'to_'.$comesfrom})) { |
my $linkpc=0; |
| $hash{'to_'.$comesfrom}.=','.$linkid; |
|
| } else { |
$fn=~/\.(\w+)$/; |
| $hash{'to_'.$comesfrom}=''.$linkid; |
|
| |
$hash{'map_type_'.$lpc}=$1; |
| |
|
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my $randomize = ($randomorder{$parent_rid} =~ /^yes$/i); |
| |
|
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# Parse the resources, link and condition tags. |
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# Note that if randomorder or random select is chosen the links and |
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# conditions are meaningless but are determined by the randomization. |
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# This is handled in the next chunk of code. |
| |
|
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my @map_ids; |
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my $codechecked; |
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$rescount{$lpc} = 0; |
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$mapcount{$lpc} = 0; |
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while (my $token = $parser->get_token) { |
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next if ($token->[0] ne 'S'); |
| |
|
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# Resource |
| |
|
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if ($token->[1] eq 'resource') { |
| |
my $resource_id = &parse_resource($token,$lpc,$ispage,$uri,$courseid); |
| |
if (defined $resource_id) { |
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push(@map_ids, $resource_id); |
| |
if ($hash{'src_'.$lpc.'.'.$resource_id}) { |
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$rescount{$lpc} ++; |
| |
if (($hash{'src_'.$lpc.'.'.$resource_id}=~/\.sequence$/) || |
| |
($hash{'src_'.$lpc.'.'.$resource_id}=~/\.page$/)) { |
| |
$mapcount{$lpc} ++; |
| } |
} |
| if (defined($hash{'from_'.$goesto})) { |
} |
| $hash{'from_'.$goesto}.=','.$linkid; |
unless ($codechecked) { |
| } else { |
my $startsymb = |
| $hash{'from_'.$goesto}=''.$linkid; |
&Apache::lonnet::encode_symb($hash{'map_id_'.$lpc},$resource_id, |
| |
$hash{'src_'."$lpc.$resource_id"}); |
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my $code = |
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&Apache::lonnet::EXT('resource.0.examcode',$startsymb,undef,undef, |
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undef,undef,$courseid); |
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if ($code) { |
| |
$randomizationcode{$parent_rid} = $code; |
| } |
} |
| } |
$codechecked = 1; |
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} |
| |
} |
| |
|
| } |
# Link |
| |
|
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} elsif ($token->[1] eq 'link' && !$randomize) { |
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&make_link(++$linkpc,$lpc,$token->[2]->{'to'}, |
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$token->[2]->{'from'}, |
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$token->[2]->{'condition'}); # note ..condition may be undefined. |
| |
|
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# condition |
| |
|
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} elsif ($token->[1] eq 'condition' && !$randomize) { |
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&parse_condition($token,$lpc); |
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} |
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} |
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undef($codechecked); |
| |
|
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# Handle randomization and random selection |
| |
|
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if ($randomize) { |
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my $advanced; |
| |
if ($env{'request.course.id'}) { |
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$advanced = (&Apache::lonnet::allowed('adv') eq 'F'); |
| |
} else { |
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$env{'request.course.id'} = $courseid; |
| |
$advanced = (&Apache::lonnet::allowed('adv') eq 'F'); |
| |
$env{'request.course.id'} = ''; |
| } |
} |
| |
unless ($advanced) { |
| |
# Order of resources is not randomized if user has and advanced role in the course. |
| |
my $seed; |
| |
|
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# If the map's random seed parameter has been specified |
| |
# it is used as the basis for computing the seed ... |
| |
|
| |
if (defined($randompickseed{$parent_rid})) { |
| |
$seed = $randompickseed{$parent_rid}; |
| |
} else { |
| |
|
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# Otherwise the parent's fully encoded symb is used. |
| |
|
| |
my ($mapid,$resid)=split(/\./,$parent_rid); |
| |
my $symb= |
| |
&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid}, |
| |
$resid,$hash{'src_'.$parent_rid}); |
| |
|
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$seed = $symb; |
| |
} |
| |
|
| |
# TODO: Here for sure we need to pass along the username/domain |
| |
# so that we can impersonate users in lonprintout e.g. |
| |
|
| |
my $setcode; |
| |
if (defined($randomizationcode{$parent_rid})) { |
| |
if ($env{'form.CODE'} eq '') { |
| |
$env{'form.CODE'} = $randomizationcode{$parent_rid}; |
| |
$setcode = 1; |
| |
} |
| |
} |
| |
|
| |
my $rndseed=&Apache::lonnet::rndseed($seed); |
| |
&Apache::lonnet::setup_random_from_rndseed($rndseed); |
| |
|
| |
if ($setcode) { |
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undef($env{'form.CODE'}); |
| |
undef($setcode); |
| |
} |
| |
|
| |
# Take the set of map ids we have decoded and permute them to a |
| |
# random order based on the seed set above. All of this is |
| |
# processing the randomorder parameter if it is set, not |
| |
# randompick. |
| |
|
| |
@map_ids=&Math::Random::random_permutation(@map_ids); |
| |
} |
| |
|
| |
my $from = shift(@map_ids); |
| |
my $from_rid = $lpc.'.'.$from; |
| |
$hash{'map_start_'.$uri} = $from_rid; |
| |
$hash{'type_'.$from_rid}='start'; |
| |
|
| |
# Create links to reflect the random re-ordering done above. |
| |
# In the code to process the map XML, we did not process links or conditions |
| |
# if randomorder was set. This means that for an instructor to choose |
| |
|
| |
while (my $to = shift(@map_ids)) { |
| |
&make_link(++$linkpc,$lpc,$to,$from); |
| |
my $to_rid = $lpc.'.'.$to; |
| |
$hash{'type_'.$to_rid}='normal'; |
| |
$from = $to; |
| |
$from_rid = $to_rid; |
| |
} |
| |
|
| |
$hash{'map_finish_'.$uri}= $from_rid; |
| |
$hash{'type_'.$from_rid}='finish'; |
| |
} |
| |
|
| |
$parser = HTML::TokeParser->new(\$instr); |
| |
$parser->attr_encoded(1); |
| |
|
| |
# last parse out the mapalias params. These provide mnemonic |
| |
# tags to resources that can be used in conditions |
| |
|
| |
while (my $token = $parser->get_token) { |
| |
next if ($token->[0] ne 'S'); |
| |
if ($token->[1] eq 'param') { |
| |
&parse_mapalias_param($token,$lpc); |
| |
} |
| |
} |
| |
} |
| |
|
| |
|
| |
# -------------------------------------------------------------------- Resource |
| |
# |
| |
# Parses a resource tag to produce the value to push into the |
| |
# map_ids array. |
| |
# |
| |
# |
| |
# Information about the actual type of resource is provided by the file extension |
| |
# of the uri (e.g. .problem, .sequence etc. etc.). |
| |
# |
| |
# Parameters: |
| |
# $token - A token from HTML::TokeParser |
| |
# This is an array that describes the most recently parsed HTML item. |
| |
# $lpc - Map nesting level (?) |
| |
# $ispage - True if this resource is encapsulated in a .page (assembled resourcde). |
| |
# $uri - URI of the enclosing resource. |
| |
# $courseid - Course id of the course containing the resource being parsed. |
| |
# Returns: |
| |
# Value of the id attribute of the tag. |
| |
# |
| |
# Note: |
| |
# The token is an array that contains the following elements: |
| |
# [0] => 'S' indicating this is a start token |
| |
# [1] => 'resource' indicating this tag is a <resource> tag. |
| |
# [2] => Hash of attribute =>value pairs. |
| |
# [3] => @(keys [2]). |
| |
# [4] => unused. |
| |
# |
| |
# The attributes of the resourcde tag include: |
| |
# |
| |
# id - The resource id. |
| |
# src - The URI of the resource. |
| |
# type - The resource type (e.g. start and finish). |
| |
# title - The resource title. |
| |
|
| |
|
| |
sub parse_resource { |
| |
my ($token,$lpc,$ispage,$uri,$courseid) = @_; |
| |
|
| |
# I refuse to countenance code like this that has |
| |
# such a dirty side effect (and forcing this sub to be called within a loop). |
| |
# |
| |
# if ($token->[2]->{'type'} eq 'zombie') { next; } |
| |
# |
| |
# The original code both returns _and_ skips to the next pass of the >caller's< |
| |
# loop, that's just dirty. |
| |
# |
| |
|
| |
# Zombie resources don't produce anything useful. |
| |
|
| |
if ($token->[2]->{'type'} eq 'zombie') { |
| |
return undef; |
| |
} |
| |
|
| |
my $rid=$lpc.'.'.$token->[2]->{'id'}; # Resource id in hash is levelcounter.id-in-xml. |
| |
|
| |
# Save the hash element type and title: |
| |
|
| |
$hash{'kind_'.$rid}='res'; |
| |
$hash{'title_'.$rid}=$token->[2]->{'title'}; |
| |
|
| |
# Get the version free URI for the resource. |
| |
# If a 'version' attribute was supplied, and this resource's version |
| |
# information has not yet been stored, store it. |
| |
# |
| |
|
| |
my $turi=&versiontrack($token->[2]->{'src'}); |
| |
if ($token->[2]->{'version'}) { |
| |
unless ($hash{'version_'.$turi}) { |
| |
$hash{'version_'.$turi}=$1; |
| |
} |
| |
} |
| |
# Pull out the title and do entity substitution on &colon |
| |
# Q: Why no other entity substitutions? |
| |
|
| |
my $title=$token->[2]->{'title'}; |
| |
$title=~s/\&colon\;/\:/gs; |
| |
|
| |
|
| |
|
| |
# I think the point of all this code is to construct a final |
| |
# URI that apache and its rewrite rules can use to |
| |
# fetch the resource. Thi s sonly necessary if the resource |
| |
# is not a page. If the resource is a page then it must be |
| |
# assembled (at fetch time?). |
| |
|
| |
unless ($ispage) { |
| |
$turi=~/\.(\w+)$/; |
| |
my $embstyle=&Apache::loncommon::fileembstyle($1); |
| |
if ($token->[2]->{'external'} eq 'true') { # external |
| |
$turi=~s/^https?\:\/\//\/adm\/wrapper\/ext\//; |
| |
} elsif ($turi=~/^\/*uploaded\//) { # uploaded |
| |
if (($embstyle eq 'img') |
| |
|| ($embstyle eq 'emb') |
| |
|| ($embstyle eq 'wrp')) { |
| |
$turi='/adm/wrapper'.$turi; |
| |
} elsif ($embstyle eq 'ssi') { |
| |
#do nothing with these |
| |
} elsif ($turi!~/\.(sequence|page)$/) { |
| |
$turi='/adm/coursedocs/showdoc'.$turi; |
| |
} |
| |
} elsif ($turi=~ m{^/adm/$match_domain/$match_courseid/\d+/ext\.tool$}) { |
| |
$turi='/adm/wrapper'.$turi; |
| |
} elsif ($turi=~/\S/) { # normal non-empty internal resource |
| |
my $mapdir=$uri; |
| |
$mapdir=~s/[^\/]+$//; |
| |
$turi=&Apache::lonnet::hreflocation($mapdir,$turi); |
| |
if (($embstyle eq 'img') |
| |
|| ($embstyle eq 'emb') |
| |
|| ($embstyle eq 'wrp')) { |
| |
$turi='/adm/wrapper'.$turi; |
| |
} |
| |
} |
| |
} |
| |
# Store reverse lookup, remove query string resource 'ids'_uri => resource id. |
| |
# If the URI appears more than one time in the sequence, it's resourcde |
| |
# id's are constructed as a comma spearated list. |
| |
|
| |
my $idsuri=$turi; |
| |
$idsuri=~s/\?.+$//; |
| |
if (defined($hash{'ids_'.$idsuri})) { |
| |
$hash{'ids_'.$idsuri}.=','.$rid; |
| |
} else { |
| |
$hash{'ids_'.$idsuri}=''.$rid; |
| |
} |
| |
|
| |
|
| |
|
| |
if ($turi=~/\/(syllabus|aboutme|navmaps|smppg|bulletinboard|viewclasslist)$/) { |
| |
$turi.='?register=1'; |
| |
} |
| |
|
| |
|
| |
# resource id lookup: 'src'_resourc-di => URI decorated with a query |
| |
# parameter as above if necessary due to the resource type. |
| |
|
| |
$hash{'src_'.$rid}=$turi; |
| |
|
| |
# Mark the external-ness of the resource: |
| |
|
| |
if ($token->[2]->{'external'} eq 'true') { |
| |
$hash{'ext_'.$rid}='true:'; |
| |
} else { |
| |
$hash{'ext_'.$rid}='false:'; |
| |
} |
| |
|
| |
# If the resource is a start/finish resource set those |
| |
# entries in the has so that navigation knows where everything starts. |
| |
# TODO? If there is a malformed sequence that has no start or no finish |
| |
# resource, should this be detected and errors thrown? How would such a |
| |
# resource come into being other than being manually constructed by a person |
| |
# and then uploaded? Could that happen if an author decided a sequence was almost |
| |
# right edited it by hand and then reuploaded it to 'fix it' but accidently cut the |
| |
# start or finish resources? |
| |
# |
| |
# All resourcess also get a type_id => (start | finish | normal) hash entr. |
| |
# |
| |
if ($token->[2]->{'type'}) { |
| |
$hash{'type_'.$rid}=$token->[2]->{'type'}; |
| |
if ($token->[2]->{'type'} eq 'start') { |
| |
$hash{'map_start_'.$uri}="$rid"; |
| |
} |
| |
if ($token->[2]->{'type'} eq 'finish') { |
| |
$hash{'map_finish_'.$uri}="$rid"; |
| |
} |
| |
} else { |
| |
$hash{'type_'.$rid}='normal'; |
| |
} |
| |
|
| |
# Sequences end pages are constructed entities. They require that the |
| |
# map that defines _them_ be loaded as well into the hash...with this resourcde |
| |
# as the base of the nesting. |
| |
# Resources like that are also marked with is_map_id => 1 entries. |
| |
# |
| |
|
| |
if (($turi=~/\.sequence$/) || |
| |
($turi=~/\.page$/)) { |
| |
$hash{'is_map_'.$rid}=1; |
| |
&loadmap($turi,$rid,$courseid); |
| |
} |
| |
return $token->[2]->{'id'}; |
| |
} |
| |
|
| |
#-------------------------------------------------------------------- link |
| |
# Links define how you are allowed to move from one resource to another. |
| |
# They are the transition edges in the directed graph that a map is. |
| |
# This sub takes informatino from a <link> tag and constructs the |
| |
# navigation bits and pieces of a map. There is no requirement that the |
| |
# resources that are linke are already defined, however clearly the map is |
| |
# badly broken if they are not _eventually_ defined. |
| |
# |
| |
# Note that links can be unconditional or conditional. |
| |
# |
| |
# Parameters: |
| |
# linkpc - The link counter for this level of map nesting (this is |
| |
# reset to zero by loadmap prior to starting to process |
| |
# links for map). |
| |
# lpc - The map level ocounter (how deeply nested this map is in |
| |
# the hierarchy of maps that are recursively read in. |
| |
# to - resource id (within the XML) of the target of the edge. |
| |
# from - resource id (within the XML) of the source of the edge. |
| |
# condition- id of condition associated with the edge (also within the XML). |
| |
# |
| |
|
| |
sub make_link { |
| |
my ($linkpc,$lpc,$to,$from,$condition) = @_; |
| |
|
| |
# Compute fully qualified ids for the link, the |
| |
# and from/to by prepending lpc. |
| |
# |
| |
|
| |
my $linkid=$lpc.'.'.$linkpc; |
| |
my $goesto=$lpc.'.'.$to; |
| |
my $comesfrom=$lpc.'.'.$from; |
| |
my $undercond=0; |
| |
|
| |
|
| |
# If there is a condition, qualify it with the level counter. |
| |
|
| |
if ($condition) { |
| |
$undercond=$lpc.'.'.$condition; |
| |
} |
| |
|
| |
# Links are represnted by: |
| |
# goesto_.fuullyqualifedlinkid => fully qualified to |
| |
# comesfrom.fullyqualifiedlinkid => fully qualified from |
| |
# undercond_.fullyqualifiedlinkid => fully qualified condition id. |
| |
|
| |
$hash{'goesto_'.$linkid}=$goesto; |
| |
$hash{'comesfrom_'.$linkid}=$comesfrom; |
| |
$hash{'undercond_'.$linkid}=$undercond; |
| |
|
| |
# In addition: |
| |
# to_.fully qualified from => comma separated list of |
| |
# link ids with that from. |
| |
# Similarly: |
| |
# from_.fully qualified to => comma separated list of link ids` |
| |
# with that to. |
| |
# That allows us given a resource id to know all edges that go to it |
| |
# and leave from it. |
| |
# |
| |
|
| |
if (defined($hash{'to_'.$comesfrom})) { |
| |
$hash{'to_'.$comesfrom}.=','.$linkid; |
| |
} else { |
| |
$hash{'to_'.$comesfrom}=''.$linkid; |
| |
} |
| |
if (defined($hash{'from_'.$goesto})) { |
| |
$hash{'from_'.$goesto}.=','.$linkid; |
| } else { |
} else { |
| $errtext.='Map not loaded: The file does not exist. '; |
$hash{'from_'.$goesto}=''.$linkid; |
| |
} |
| |
} |
| |
|
| |
# ------------------------------------------------------------------- Condition |
| |
# |
| |
# Processes <condition> tags, storing sufficient information about them |
| |
# in the hash so that they can be evaluated and used to conditionalize |
| |
# what is presented to the student. |
| |
# |
| |
# these can have the following attributes |
| |
# |
| |
# id = A unique identifier of the condition within the map. |
| |
# |
| |
# value = Is a perl script-let that, when evaluated in safe space |
| |
# determines whether or not the condition is true. |
| |
# Normally this takes the form of a test on an Apache::lonnet::EXT call |
| |
# to find the value of variable associated with a resource in the |
| |
# map identified by a mapalias. |
| |
# Here's a fragment of XML code that illustrates this: |
| |
# |
| |
# <param to="5" value="mainproblem" name="parameter_0_mapalias" type="string" /> |
| |
# <resource src="" id="1" type="start" title="Start" /> |
| |
# <resource src="/res/msu/albertel/b_and_c/p1.problem" id="5" title="p1.problem" /> |
| |
# <condition value="&EXT('user.resource.resource.0.tries','mainproblem') |
| |
# <2 " id="61" type="stop" /> |
| |
# <link to="5" index="1" from="1" condition="61" /> |
| |
# |
| |
# In this fragment: |
| |
# - The param tag establishes an alias to resource id 5 of 'mainproblem'. |
| |
# - The resource that is the start of the map is identified. |
| |
# - The resource tag identifies the resource associated with this tag |
| |
# and gives it the id 5. |
| |
# - The condition is true if the tries variable associated with mainproblem |
| |
# is less than 2 (that is the user has had more than 2 tries). |
| |
# The condition type is a stop condition which inhibits(?) the associated |
| |
# link if the condition is false. |
| |
# - The link to resource 5 from resource 1 is affected by this condition. |
| |
# |
| |
# type = Type of the condition. The type determines how the condition affects the |
| |
# link associated with it and is one of |
| |
# - 'force' |
| |
# - 'stop' |
| |
# anything else including not supplied..which treated as: |
| |
# - 'normal'. |
| |
# Presumably maps get created by the resource assembly tool and therefore |
| |
# illegal type values won't squirm their way into the XML. |
| |
# |
| |
# Side effects: |
| |
# - The kind_level-qualified-condition-id hash element is set to 'cond'. |
| |
# - The condition text is pushed into the cond array and its element number is |
| |
# set in the condid_level-qualified-condition-id element of the hash. |
| |
# - The condition type is colon appneded to the cond array element for this condition. |
| |
sub parse_condition { |
| |
my ($token,$lpc) = @_; |
| |
my $rid=$lpc.'.'.$token->[2]->{'id'}; |
| |
|
| |
$hash{'kind_'.$rid}='cond'; |
| |
|
| |
my $condition = $token->[2]->{'value'}; |
| |
$condition =~ s/[\n\r]+/ /gs; |
| |
push(@cond, $condition); |
| |
$hash{'condid_'.$rid}=$#cond; |
| |
if ($token->[2]->{'type'}) { |
| |
$cond[$#cond].=':'.$token->[2]->{'type'}; |
| |
} else { |
| |
$cond[$#cond].=':normal'; |
| |
} |
| |
} |
| |
|
| |
# ------------------------------------------------------------------- Parameter |
| |
# Parse a <parameter> tag in the map. |
| |
# Parmameters: |
| |
# $token Token array for a start tag from HTML::TokeParser |
| |
# [0] = 'S' |
| |
# [1] = tagname ("param") |
| |
# [2] = Hash of {attribute} = values. |
| |
# [3] = Array of the keys in [2]. |
| |
# [4] = unused. |
| |
# $lpc Current map nesting level.a |
| |
# |
| |
# Typical attributes: |
| |
# to=n - Number of the resource the parameter applies to. |
| |
# type=xx - Type of parameter value (e.g. string_yesno or int_pos). |
| |
# name=xxx - Name of parameter (e.g. parameter_randompick or parameter_randomorder). |
| |
# value=xxx - value of the parameter. |
| |
|
| |
sub parse_param { |
| |
my ($token,$lpc) = @_; |
| |
my $referid=$lpc.'.'.$token->[2]->{'to'}; # Resource param applies to. |
| |
my $name=$token->[2]->{'name'}; # Name of parameter |
| |
my $part; |
| |
|
| |
|
| |
if ($name=~/^parameter_(.*)_/) { |
| |
$part=$1; |
| |
} else { |
| |
$part=0; |
| |
} |
| |
|
| |
# Peel the parameter_ off the parameter name. |
| |
|
| |
$name=~s/^.*_([^_]*)$/$1/; |
| |
|
| |
# The value is: |
| |
# type.part.name.value |
| |
|
| |
my $newparam= |
| |
&escape($token->[2]->{'type'}).':'. |
| |
&escape($part.'.'.$name).'='. |
| |
&escape($token->[2]->{'value'}); |
| |
|
| |
# The hash key is param_resourceid. |
| |
# Multiple parameters for a single resource are & separated in the hash. |
| |
|
| |
|
| |
if (defined($hash{'param_'.$referid})) { |
| |
$hash{'param_'.$referid}.='&'.$newparam; |
| |
} else { |
| |
$hash{'param_'.$referid}=''.$newparam; |
| |
} |
| |
# |
| |
# These parameters have to do with randomly selecting |
| |
# resources, therefore a separate hash is also created to |
| |
# make it easy to locate them when actually computing the resource set later on |
| |
# See the code conditionalized by ($randomize) in loadmap(). |
| |
|
| |
if ($token->[2]->{'name'}=~/^parameter_(0_)*randompick$/) { # Random selection turned on |
| |
$randompick{$referid}=$token->[2]->{'value'}; |
| |
} |
| |
if ($token->[2]->{'name'}=~/^parameter_(0_)*randompickseed$/) { # Randomseed provided. |
| |
$randompickseed{$referid}=$token->[2]->{'value'}; |
| |
} |
| |
if ($token->[2]->{'name'}=~/^parameter_(0_)*randomorder$/) { # Random order turned on. |
| |
$randomorder{$referid}=$token->[2]->{'value'}; |
| |
} |
| |
|
| |
# These parameters have to do with how the URLs of resources are presented to |
| |
# course members(?). encrypturl presents encypted url's while |
| |
# hiddenresource hides the URL. |
| |
# |
| |
|
| |
if ($token->[2]->{'name'}=~/^parameter_(0_)*encrypturl$/) { |
| |
if ($token->[2]->{'value'}=~/^yes$/i) { |
| |
$encurl{$referid}=1; |
| |
} |
| |
} |
| |
if ($token->[2]->{'name'}=~/^parameter_(0_)*hiddenresource$/) { |
| |
if ($token->[2]->{'value'}=~/^yes$/i) { |
| |
$hiddenurl{$referid}=1; |
| |
} |
| |
} |
| |
} |
| |
# |
| |
# Parse mapalias parameters. |
| |
# these are tags of the form: |
| |
# <param to="nn" |
| |
# value="some-alias-for-resourceid-nn" |
| |
# name="parameter_0_mapalias" |
| |
# type="string" /> |
| |
# A map alias is a textual name for a resource: |
| |
# - The to attribute identifies the resource (this gets level qualified below) |
| |
# - The value attributes provides the alias string. |
| |
# - name must be of the regexp form: /^parameter_(0_)*mapalias$/ |
| |
# - e.g. the string 'parameter_' followed by 0 or more "0_" strings |
| |
# terminating with the string 'mapalias'. |
| |
# Examples: |
| |
# 'parameter_mapalias', 'parameter_0_mapalias', parameter_0_0_mapalias' |
| |
# Invalid to ids are silently ignored. |
| |
# |
| |
# Parameters: |
| |
# token - The token array fromthe HMTML::TokeParser |
| |
# lpc - The current map level counter. |
| |
# |
| |
sub parse_mapalias_param { |
| |
my ($token,$lpc) = @_; |
| |
|
| |
# Fully qualify the to value and ignore the alias if there is no |
| |
# corresponding resource. |
| |
|
| |
my $referid=$lpc.'.'.$token->[2]->{'to'}; |
| |
return if (!exists($hash{'src_'.$referid})); |
| |
|
| |
# If this is a valid mapalias parameter, |
| |
# Append the target id to the count_mapalias element for that |
| |
# alias so that we can detect doubly defined aliases |
| |
# e.g.: |
| |
# <param to="1" value="george" name="parameter_0_mapalias" type="string" /> |
| |
# <param to="2" value="george" name="parameter_0_mapalias" type="string" /> |
| |
# |
| |
# The example above is trivial but the case that's important has to do with |
| |
# constructing a map that includes a nested map where the nested map may have |
| |
# aliases that conflict with aliases established in the enclosing map. |
| |
# |
| |
# ...and create/update the hash mapalias entry to actually store the alias. |
| |
# |
| |
|
| |
if ($token->[2]->{'name'}=~/^parameter_(0_)*mapalias$/) { |
| |
&count_mapalias($token->[2]->{'value'},$referid); |
| |
$hash{'mapalias_'.$token->[2]->{'value'}}=$referid; |
| } |
} |
| } |
} |
| |
|
| # --------------------------------------------------------- Simplify expression |
# --------------------------------------------------------- Simplify expression |
| |
|
| |
|
| |
# |
| |
# Someone should really comment this to describe what it does to what and why. |
| |
# |
| sub simplify { |
sub simplify { |
| my $expression=shift; |
my $expression=shift; |
| |
# (0&1) = 1 |
| |
$expression=~s/\(0\&([_\.\d]+)\)/$1/g; |
| # (8)=8 |
# (8)=8 |
| $expression=~s/\((\d+)\)/$1/g; |
$expression=~s/\(([_\.\d]+)\)/$1/g; |
| # 8&8=8 |
# 8&8=8 |
| $expression=~s/(\D)(\d+)\&\2(\D)/$1$2$3/g; |
$expression=~s/([^_\.\d])([_\.\d]+)\&\2([^_\.\d])/$1$2$3/g; |
| # 8|8=8 |
# 8|8=8 |
| $expression=~s/(\D)(\d+)\|\2(\D)/$1$2$3/g; |
$expression=~s/([^_\.\d])([_\.\d]+)(?:\|\2)+([^_\.\d])/$1$2$3/g; |
| # (5&3)&4=5&3&4 |
# (5&3)&4=5&3&4 |
| $expression=~s/\((\d+)((?:\&\d+)+)\)\&(\d+\D)/$1$2\&$3/g; |
$expression=~s/\(([_\.\d]+)((?:\&[_\.\d]+)+)\)\&([_\.\d]+[^_\.\d])/$1$2\&$3/g; |
| # (((5&3)|(4&6)))=((5&3)|(4&6)) |
# (((5&3)|(4&6)))=((5&3)|(4&6)) |
| $expression=~ |
$expression=~ |
| s/\((\(\(\d+(?:\&\d+)*\)(?:\|\(\d+(?:\&\d+)*\))+\))\)/$1/g; |
s/\((\(\([_\.\d]+(?:\&[_\.\d]+)*\)(?:\|\([_\.\d]+(?:\&[_\.\d]+)*\))+\))\)/$1/g; |
| # ((5&3)|(4&6))|(1&2)=(5&3)|(4&6)|(1&2) |
# ((5&3)|(4&6))|(1&2)=(5&3)|(4&6)|(1&2) |
| $expression=~ |
$expression=~ |
| s/\((\(\d+(?:\&\d+)*\))((?:\|\(\d+(?:\&\d+)*\))+)\)\|(\(\d+(?:\&\d+)*\))/\($1$2\|$3\)/g; |
s/\((\([_\.\d]+(?:\&[_\.\d]+)*\))((?:\|\([_\.\d]+(?:\&[_\.\d]+)*\))+)\)\|(\([_\.\d]+(?:\&[_\.\d]+)*\))/\($1$2\|$3\)/g; |
| return $expression; |
return $expression; |
| } |
} |
| |
|
| # -------------------------------------------------------- Build condition hash |
# -------------------------------------------------------- Build condition hash |
| |
|
| |
# |
| |
# Traces a route recursively through the map after it has been loaded |
| |
# (I believe this really visits each resourcde that is reachable fromt he |
| |
# start top node. |
| |
# |
| |
# - Marks hidden resources as hidden. |
| |
# - Marks which resource URL's must be encrypted. |
| |
# - Figures out (if necessary) the first resource in the map. |
| |
# - Further builds the chunks of the big hash that define how |
| |
# conditions work |
| |
# |
| |
# Note that the tracing strategy won't visit resources that are not linked to |
| |
# anything or islands in the map (groups of resources that form a path but are not |
| |
# linked in to the path that can be traced from the start resource...but that's ok |
| |
# because by definition, those resources are not reachable by users of the course. |
| |
# |
| |
# Parameters: |
| |
# sofar - _URI of the prior entry or 0 if this is the top. |
| |
# rid - URI of the resource to visit. |
| |
# beenhere - list of resources (each resource enclosed by &'s) that have |
| |
# already been visited. |
| |
# encflag - If true the resource that resulted in a recursive call to us |
| |
# has an encoded URL (which means contained resources should too). |
| |
# hdnflag - If true,the resource that resulted in a recursive call to us |
| |
# was hidden (which means contained resources should be hidden too). |
| |
# Returns |
| |
# new value indicating how far the map has been traversed (the sofar). |
| |
# |
| sub traceroute { |
sub traceroute { |
| my ($sofar,$rid,$beenhere)=@_; |
my ($sofar,$rid,$beenhere,$encflag,$hdnflag)=@_; |
| $sofar=simplify($sofar); |
my $newsofar=$sofar=simplify($sofar); |
| unless ($beenhere=~/\&$rid\&/) { |
|
| $beenhere.=$rid.'&'; |
unless ($beenhere=~/\&\Q$rid\E\&/) { |
| if (defined($hash{'conditions_'.$rid})) { |
$beenhere.=$rid.'&'; |
| $hash{'conditions_'.$rid}=simplify( |
my ($mapid,$resid)=split(/\./,$rid); |
| |
my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$hash{'src_'.$rid}); |
| |
my $hidden=&Apache::lonnet::EXT('resource.0.hiddenresource',$symb); |
| |
|
| |
if ($hdnflag || lc($hidden) eq 'yes') { |
| |
$hiddenurl{$rid}=1; |
| |
} |
| |
if (!$hdnflag && lc($hidden) eq 'no') { |
| |
delete($hiddenurl{$rid}); |
| |
} |
| |
|
| |
my $encrypt=&Apache::lonnet::EXT('resource.0.encrypturl',$symb); |
| |
if ($encflag || lc($encrypt) eq 'yes') { $encurl{$rid}=1; } |
| |
|
| |
if (($retfrid eq '') && ($hash{'src_'.$rid}) |
| |
&& ($hash{'src_'.$rid}!~/\.sequence$/)) { |
| |
$retfrid=$rid; |
| |
} |
| |
|
| |
if (defined($hash{'conditions_'.$rid})) { |
| |
$hash{'conditions_'.$rid}=simplify( |
| '('.$hash{'conditions_'.$rid}.')|('.$sofar.')'); |
'('.$hash{'conditions_'.$rid}.')|('.$sofar.')'); |
| } else { |
} else { |
| $hash{'conditions_'.$rid}=$sofar; |
$hash{'conditions_'.$rid}=$sofar; |
| } |
} |
| if (defined($hash{'is_map_'.$rid})) { |
|
| if (defined($hash{'map_start_'.$hash{'src_'.$rid}})) { |
# if the expression is just the 0th condition keep it |
| &traceroute($sofar,$hash{'map_start_'.$hash{'src_'.$rid}},'&'); |
# otherwise leave a pointer to this condition expression |
| if (defined($hash{'map_finish_'.$hash{'src_'.$rid}})) { |
|
| $sofar= |
$newsofar = ($sofar eq '0') ? $sofar : '_'.$rid; |
| $hash{'conditions_'.$hash{'map_finish_'.$hash{'src_'.$rid}}}; |
|
| } |
# Recurse if the resource is a map: |
| } |
|
| } |
if (defined($hash{'is_map_'.$rid})) { |
| if (defined($hash{'to_'.$rid})) { |
if (defined($hash{'map_start_'.$hash{'src_'.$rid}})) { |
| map { |
$sofar=$newsofar= |
| |
&traceroute($sofar, |
| |
$hash{'map_start_'.$hash{'src_'.$rid}}, |
| |
$beenhere, |
| |
$encflag || $encurl{$rid}, |
| |
$hdnflag || $hiddenurl{$rid}); |
| |
} |
| |
} |
| |
|
| |
# Processes links to this resource: |
| |
# - verify the existence of any conditionals on the link to here. |
| |
# - Recurse to any resources linked to us. |
| |
# |
| |
if (defined($hash{'to_'.$rid})) { |
| |
foreach my $id (split(/\,/,$hash{'to_'.$rid})) { |
| my $further=$sofar; |
my $further=$sofar; |
| if ($hash{'undercond_'.$_}) { |
# |
| if (defined($hash{'condid_'.$hash{'undercond_'.$_}})) { |
# If there's a condition associated with this link be sure |
| $further=simplify('('.$further.')&('. |
# it's been defined else that's an error: |
| $hash{'condid_'.$hash{'undercond_'.$_}}.')'); |
# |
| } else { |
if ($hash{'undercond_'.$id}) { |
| $errtext.='Undefined condition ID: ' |
if (defined($hash{'condid_'.$hash{'undercond_'.$id}})) { |
| .$hash{'undercond_'.$_}.'. '; |
$further=simplify('('.'_'.$rid.')&('. |
| } |
$hash{'condid_'.$hash{'undercond_'.$id}}.')'); |
| } |
} else { |
| &traceroute($further,$hash{'goesto_'.$_},$beenhere); |
$errtext.= '<br />'. |
| } split(/\,/,$hash{'to_'.$rid}); |
&mt('Undefined condition ID: [_1]', |
| } |
$hash{'undercond_'.$id}); |
| |
} |
| |
} |
| |
# Recurse to resoruces that have to's to us. |
| |
$newsofar=&traceroute($further,$hash{'goesto_'.$id},$beenhere, |
| |
$encflag,$hdnflag); |
| |
} |
| |
} |
| } |
} |
| |
return $newsofar; |
| } |
} |
| |
|
| # ------------------------------------------ Cascading conditions, quick access |
# ------------------------------ Cascading conditions, quick access, parameters |
| |
|
| |
# |
| |
# Seems a rather strangely named sub given what the comment above says it does. |
| |
|
| |
|
| sub accinit { |
sub accinit { |
| my ($uri,$short,$fn)=@_; |
my ($uri,$short,$fn)=@_; |
|
Line 244 sub accinit {
|
Line 985 sub accinit {
|
| my %captured=(); |
my %captured=(); |
| my $condcounter=0; |
my $condcounter=0; |
| $acchash{'acc.cond.'.$short.'.0'}=0; |
$acchash{'acc.cond.'.$short.'.0'}=0; |
| map { |
|
| if ($_=~/^conditions/) { |
# This loop is only interested in conditions and |
| my $expr=$hash{$_}; |
# parameters in the big hash: |
| map { |
|
| my $sub=$_; |
foreach my $key (keys(%hash)) { |
| my $orig=$_; |
|
| $sub=~/\(\((\d+\&(:?\d+\&)*)(?:\d+\&*)+\)(?:\|\(\1(?:\d+\&*)+\))+\)/; |
# conditions: |
| my $factor=$1; |
|
| $sub=~s/$factor//g; |
if ($key=~/^conditions/) { |
| $sub=~s/^\(/\($factor\(/; |
my $expr=$hash{$key}; |
| $sub.=')'; |
|
| $sub=simplify($sub); |
# try to find and factor out common sub-expressions |
| $orig=~s/(\W)/\\$1/g; |
# Any subexpression that is found is simplified, removed from |
| $expr=~s/$orig/$sub/; |
# the original condition expression and the simplified sub-expression |
| } ($expr=~m/(\(\(\d+(?:\&\d+)+\)(?:\|\(\d+(?:\&\d+)+\))+\))/g); |
# substituted back in to the epxression..I'm not actually convinced this |
| $hash{$_}=$expr; |
# factors anything out...but instead maybe simplifies common factors(?) |
| unless (defined($captured{$expr})) { |
|
| $condcounter++; |
foreach my $sub ($expr=~m/(\(\([_\.\d]+(?:\&[_\.\d]+)+\)(?:\|\([_\.\d]+(?:\&[_\.\d]+)+\))+\))/g) { |
| $captured{$expr}=$condcounter; |
my $orig=$sub; |
| $acchash{'acc.cond.'.$short.'.'.$condcounter}=$expr; |
|
| } |
my ($factor) = ($sub=~/\(\(([_\.\d]+\&(:?[_\.\d]+\&)*)(?:[_\.\d]+\&*)+\)(?:\|\(\1(?:[_\.\d]+\&*)+\))+\)/); |
| } |
next if (!defined($factor)); |
| } keys %hash; |
|
| map { |
$sub=~s/\Q$factor\E//g; |
| if ($_=~/^ids/) { |
$sub=~s/^\(/\($factor\(/; |
| my $resid=$hash{$_}; |
$sub.=')'; |
| my $uri=$hash{'src_'.$resid}; |
$sub=simplify($sub); |
| my @uriparts=split(/\//,$uri); |
$expr=~s/\Q$orig\E/$sub/; |
| my $urifile=$uriparts[$#uriparts]; |
} |
| $#uriparts--; |
$hash{$key}=$expr; |
| my $uripath=join('/',@uriparts); |
|
| $uripath=~s/^\/res\///; |
# If not yet seen, record in acchash and that we've seen it. |
| if (defined($hash{'conditions_'.$resid})) { |
|
| $urifile.=':'.$captured{$hash{'conditions_'.$resid}}; |
unless (defined($captured{$expr})) { |
| } else { |
$condcounter++; |
| $urifile.=':0'; |
$captured{$expr}=$condcounter; |
| |
$acchash{'acc.cond.'.$short.'.'.$condcounter}=$expr; |
| |
} |
| |
# Parameters: |
| |
|
| |
} elsif ($key=~/^param_(\d+)\.(\d+)/) { |
| |
my $prefix=&Apache::lonnet::encode_symb($hash{'map_id_'.$1},$2, |
| |
$hash{'src_'.$1.'.'.$2}); |
| |
foreach my $param (split(/\&/,$hash{$key})) { |
| |
my ($typename,$value)=split(/\=/,$param); |
| |
my ($type,$name)=split(/\:/,$typename); |
| |
$parmhash{$prefix.'.'.&unescape($name)}= |
| |
&unescape($value); |
| |
$parmhash{$prefix.'.'.&unescape($name).'.type'}= |
| |
&unescape($type); |
| |
} |
| |
} |
| |
} |
| |
# This loop only processes id entries in the big hash. |
| |
|
| |
foreach my $key (keys(%hash)) { |
| |
if ($key=~/^ids/) { |
| |
foreach my $resid (split(/\,/,$hash{$key})) { |
| |
my $uri=$hash{'src_'.$resid}; |
| |
my ($uripath,$urifile) = |
| |
&Apache::lonnet::split_uri_for_cond($uri); |
| |
if ($uripath) { |
| |
my $uricond='0'; |
| |
if (defined($hash{'conditions_'.$resid})) { |
| |
$uricond=$captured{$hash{'conditions_'.$resid}}; |
| |
} |
| |
if (defined($acchash{'acc.res.'.$short.'.'.$uripath})) { |
| |
if ($acchash{'acc.res.'.$short.'.'.$uripath}=~ |
| |
/(\&\Q$urifile\E\:[^\&]*)/) { |
| |
my $replace=$1; |
| |
my $regexp=$replace; |
| |
#$regexp=~s/\|/\\\|/g; |
| |
$acchash{'acc.res.'.$short.'.'.$uripath} =~ |
| |
s/\Q$regexp\E/$replace\|$uricond/; |
| |
} else { |
| |
$acchash{'acc.res.'.$short.'.'.$uripath}.= |
| |
$urifile.':'.$uricond.'&'; |
| |
} |
| |
} else { |
| |
$acchash{'acc.res.'.$short.'.'.$uripath}= |
| |
'&'.$urifile.':'.$uricond.'&'; |
| |
} |
| |
} |
| |
} |
| |
} |
| |
} |
| |
$acchash{'acc.res.'.$short.'.'}='&:0&'; |
| |
my $courseuri=$uri; |
| |
$courseuri=~s/^\/res\///; |
| |
my $regexp = 1; |
| |
&Apache::lonnet::delenv('(acc\.|httpref\.)',$regexp); |
| |
&Apache::lonnet::appenv(\%acchash); |
| |
} |
| |
|
| |
# ---------------- Selectively delete from randompick maps and hidden url parms |
| |
|
| |
sub hiddenurls { |
| |
my $randomoutentry=''; |
| |
foreach my $rid (keys(%randompick)) { |
| |
my $rndpick=$randompick{$rid}; |
| |
my $mpc=$hash{'map_pc_'.$hash{'src_'.$rid}}; |
| |
# ------------------------------------------- put existing resources into array |
| |
my @currentrids=(); |
| |
foreach my $key (sort(keys(%hash))) { |
| |
if ($key=~/^src_($mpc\.\d+)/) { |
| |
if ($hash{'src_'.$1}) { push @currentrids, $1; } |
| } |
} |
| if (defined($acchash{'acc.res.'.$short.'.'.$uripath})) { |
} |
| $acchash{'acc.res.'.$short.'.'.$uripath}.=$urifile.'&'; |
# rids are number.number and we want to numercially sort on |
| } else { |
# the second number |
| $acchash{'acc.res.'.$short.'.'.$uripath}='&'.$urifile.'&'; |
@currentrids=sort { |
| |
my (undef,$aid)=split(/\./,$a); |
| |
my (undef,$bid)=split(/\./,$b); |
| |
$aid <=> $bid; |
| |
} @currentrids; |
| |
next if ($#currentrids<$rndpick); |
| |
# -------------------------------- randomly eliminate the ones that should stay |
| |
my (undef,$id)=split(/\./,$rid); |
| |
if ($randompickseed{$rid}) { $id=$randompickseed{$rid}; } |
| |
my $setcode; |
| |
if (defined($randomizationcode{$rid})) { |
| |
if ($env{'form.CODE'} eq '') { |
| |
$env{'form.CODE'} = $randomizationcode{$rid}; |
| |
$setcode = 1; |
| } |
} |
| } |
} |
| } keys %hash; |
my $rndseed=&Apache::lonnet::rndseed($id); # use id instead of symb |
| my $courseuri=$uri; |
if ($setcode) { |
| $courseuri=~s/^\/res\///; |
undef($env{'form.CODE'}); |
| &Apache::lonnet::appenv(%acchash, |
undef($setcode); |
| "request.course" => $short, |
} |
| "request.course.fn" => $fn, |
&Apache::lonnet::setup_random_from_rndseed($rndseed); |
| "request.course.uri" => $courseuri); |
my @whichids=&Math::Random::random_permuted_index($#currentrids+1); |
| |
for (my $i=1;$i<=$rndpick;$i++) { $currentrids[$whichids[$i]]=''; } |
| |
#&Apache::lonnet::logthis("$id,$rndseed,".join(':',@whichids)); |
| |
# -------------------------------------------------------- delete the leftovers |
| |
for (my $k=0; $k<=$#currentrids; $k++) { |
| |
if ($currentrids[$k]) { |
| |
$hash{'randomout_'.$currentrids[$k]}=1; |
| |
my ($mapid,$resid)=split(/\./,$currentrids[$k]); |
| |
if ($rescount{$mapid}) { |
| |
$rescount{$mapid} --; |
| |
} |
| |
if ($hash{'is_map_'.$currentrids[$k]}) { |
| |
if ($mapcount{$mapid}) { |
| |
$mapcount{$mapid} --; |
| |
} |
| |
} |
| |
$randomoutentry.='&'. |
| |
&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid}, |
| |
$resid, |
| |
$hash{'src_'.$currentrids[$k]} |
| |
).'&'; |
| |
} |
| |
} |
| |
} |
| |
# ------------------------------ take care of explicitly hidden urls or folders |
| |
foreach my $rid (keys(%hiddenurl)) { |
| |
$hash{'randomout_'.$rid}=1; |
| |
my ($mapid,$resid)=split(/\./,$rid); |
| |
if ($rescount{$mapid}) { |
| |
$rescount{$mapid} --; |
| |
} |
| |
if ($hash{'is_map_'.$rid}) { |
| |
if ($mapcount{$mapid}) { |
| |
$mapcount{$mapid} --; |
| |
} |
| |
} |
| |
$randomoutentry.='&'. |
| |
&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid, |
| |
$hash{'src_'.$rid}).'&'; |
| |
} |
| |
# --------------------------------------- append randomout entry to environment |
| |
if ($randomoutentry) { |
| |
&Apache::lonnet::appenv({'acc.randomout' => $randomoutentry}); |
| |
} |
| } |
} |
| |
|
| # ---------------------------------------------------- Read map and all submaps |
# -------------------------------------- populate big hash with map breadcrumbs |
| |
|
| # |
# Create map_breadcrumbs_$pc from map_hierarchy_$pc by omitting intermediate |
| # Call with uri of course map, short name for course, and filename for |
# maps not shown in Course Contents table. |
| # binary structure |
|
| # |
sub mapcrumbs { |
| |
foreach my $key (keys(%rescount)) { |
| |
if ($hash{'map_hierarchy_'.$key}) { |
| |
my $skipnext = 0; |
| |
foreach my $id (split(/,/,$hash{'map_hierarchy_'.$key}),$key) { |
| |
unless ($skipnext) { |
| |
$hash{'map_breadcrumbs_'.$key} .= "$id,"; |
| |
} |
| |
unless (($id == 0) || ($id == 1)) { |
| |
if ((!$rescount{$id}) || ($rescount{$id} == 1 && $mapcount{$id} == 1)) { |
| |
$skipnext = 1; |
| |
} else { |
| |
$skipnext = 0; |
| |
} |
| |
} |
| |
} |
| |
$hash{'map_breadcrumbs_'.$key} =~ s/,$//; |
| |
} |
| |
} |
| |
} |
| |
|
| |
# ---------------------------------------------------- Read map and all submaps |
| |
|
| sub readmap { |
sub readmap { |
| my ($uri,$short,$fn)=@_; |
my $short=shift; |
| @cond=('true:normal'); |
$short=~s/^\///; |
| if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_WRCREAT,0640)) { |
|
| %hash=(); |
# TODO: Hidden dependency on current user: |
| |
|
| |
my %cenv=&Apache::lonnet::coursedescription($short,{'freshen_cache'=>1}); |
| |
|
| |
my $fn=$cenv{'fn'}; |
| |
my $uri; |
| |
$short=~s/\//\_/g; |
| |
unless ($uri=$cenv{'url'}) { |
| |
&Apache::lonnet::logthis('<font color="blue">WARNING: '. |
| |
"Could not load course $short.</font>"); |
| |
return ('',&mt('No course data available.'));; |
| |
} |
| |
@cond=('true:normal'); |
| |
|
| |
unless (open(LOCKFILE,">","$fn.db.lock")) { |
| |
# |
| |
# Most likely a permissions problem on the lockfile or its directory. |
| |
# |
| |
$retfurl = ''; |
| |
return ($retfurl,'<br />'.&mt('Map not loaded - Lock file could not be opened when reading map:').' <tt>'.$fn.'</tt>.'); |
| |
} |
| |
my $lock=0; |
| |
my $gotstate=0; |
| |
|
| |
# If we can get the lock without delay any files there are idle |
| |
# and from some prior request. We'll kill them off and regenerate them: |
| |
|
| |
if (flock(LOCKFILE,LOCK_EX|LOCK_NB)) { |
| |
$lock=1; # Remember that we hold the lock. |
| |
&unlink_tmpfiles($fn); |
| |
} |
| |
undef %randompick; |
| |
undef %randompickseed; |
| |
undef %randomorder; |
| |
undef %randomizationcode; |
| |
undef %hiddenurl; |
| |
undef %encurl; |
| |
undef %rescount; |
| |
undef %mapcount; |
| |
$retfrid=''; |
| $errtext=''; |
$errtext=''; |
| |
my ($untiedhash,$untiedparmhash,$tiedhash,$tiedparmhash); # More state flags. |
| |
|
| |
# if we got the lock, regenerate course regnerate empty files and tie them. |
| |
|
| |
if ($lock) { |
| |
if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_WRCREAT(),0640)) { |
| |
$tiedhash = 1; |
| |
if (tie(%parmhash,'GDBM_File',$fn.'_parms.db',&GDBM_WRCREAT(),0640)) { |
| |
$tiedparmhash = 1; |
| |
$gotstate = &build_tmp_hashes($uri, |
| |
$fn, |
| |
$short, |
| |
\%cenv); # TODO: Need to provide requested user@dom |
| |
unless ($gotstate) { |
| |
&Apache::lonnet::logthis('Failed to write statemap at first attempt '.$fn.' for '.$uri.'.</font>'); |
| |
} |
| |
$untiedparmhash = untie(%parmhash); |
| |
unless ($untiedparmhash) { |
| |
&Apache::lonnet::logthis('<font color="blue">WARNING: '. |
| |
'Could not untie coursemap parmhash '.$fn.' for '.$uri.'.</font>'); |
| |
} |
| |
} |
| |
$untiedhash = untie(%hash); |
| |
unless ($untiedhash) { |
| |
&Apache::lonnet::logthis('<font color="blue">WARNING: '. |
| |
'Could not untie coursemap hash '.$fn.' for '.$uri.'.</font>'); |
| |
} |
| |
} |
| |
flock(LOCKFILE,LOCK_UN); # RF: this is what I don't get unless there are other |
| |
# unlocked places the remainder happens..seems like if we |
| |
# just kept the lock here the rest of the code would have |
| |
# been much easier? |
| |
} |
| |
unless ($lock && $tiedhash && $tiedparmhash) { |
| |
# if we are here it is likely because we are already trying to |
| |
# initialize the course in another child, busy wait trying to |
| |
# tie the hashes for the next 90 seconds, if we succeed forward |
| |
# them on to navmaps, if we fail, throw up the Could not init |
| |
# course screen |
| |
# |
| |
# RF: I'm not seeing the case where the ties/unties can fail in a way |
| |
# that can be remedied by this. Since we owned the lock seems |
| |
# Tie/untie failures are a result of something like a permissions problem instead? |
| |
# |
| |
|
| |
# In any vent, undo what we did manage to do above first: |
| |
if ($lock) { |
| |
# Got the lock but not the DB files |
| |
flock(LOCKFILE,LOCK_UN); |
| |
$lock = 0; |
| |
} |
| |
if ($tiedhash) { |
| |
unless($untiedhash) { |
| |
untie(%hash); |
| |
} |
| |
} |
| |
if ($tiedparmhash) { |
| |
unless($untiedparmhash) { |
| |
untie(%parmhash); |
| |
} |
| |
} |
| |
# Log our failure: |
| |
|
| |
&Apache::lonnet::logthis('<font color="blue">WARNING: '. |
| |
"Could not tie coursemap $fn for $uri.</font>"); |
| |
$tiedhash = ''; |
| |
$tiedparmhash = ''; |
| |
my $i=0; |
| |
|
| |
# Keep on retrying the lock for 90 sec until we succeed. |
| |
|
| |
while($i<90) { |
| |
$i++; |
| |
sleep(1); |
| |
if (flock(LOCKFILE,LOCK_EX|LOCK_NB)) { |
| |
|
| |
# Got the lock, tie the hashes...the assumption in this code is |
| |
# that some other worker thread has created the db files quite recently |
| |
# so no load is needed: |
| |
|
| |
$lock = 1; |
| |
if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640)) { |
| |
$tiedhash = 1; |
| |
if (tie(%parmhash,'GDBM_File',$fn.'_parms.db',&GDBM_READER(),0640)) { |
| |
$tiedparmhash = 1; |
| |
if (-e "$fn.state") { |
| |
$retfurl='/adm/navmaps'; |
| |
|
| |
# BUG BUG: Side effect! |
| |
# Should conditionalize on something so that we can use this |
| |
# to load maps for courses that are not current? |
| |
# |
| |
&Apache::lonnet::appenv({"request.course.id" => $short, |
| |
"request.course.fn" => $fn, |
| |
"request.course.uri" => $uri, |
| |
"request.course.tied" => time}); |
| |
|
| |
$untiedhash = untie(%hash); |
| |
$untiedparmhash = untie(%parmhash); |
| |
$gotstate = 1; |
| |
last; |
| |
} |
| |
$untiedparmhash = untie(%parmhash); |
| |
} |
| |
$untiedhash = untie(%hash); |
| |
} |
| |
} |
| |
} |
| |
if ($lock) { |
| |
flock(LOCKFILE,LOCK_UN); |
| |
$lock = 0; |
| |
if ($tiedparmhash) { |
| |
unless ($untiedparmhash) { |
| |
&Apache::lonnet::logthis('<font color="blue">WARNING: '. |
| |
'Could not untie coursemap parmhash '.$fn.' for '.$uri.'.</font>'); |
| |
} |
| |
} |
| |
if ($tiedparmhash) { |
| |
unless ($untiedhash) { |
| |
&Apache::lonnet::logthis('<font color="blue">WARNING: '. |
| |
'Could not untie coursemap hash '.$fn.' for '.$uri.'.</font>'); |
| |
} |
| |
} |
| |
} |
| |
} |
| |
# I think this branch of code is all about what happens if we just did the stuff above, |
| |
# but found that the state file did not exist...again if we'd just held the lock |
| |
# would that have made this logic simpler..as generating all the files would be |
| |
# an atomic operation with respect to the lock. |
| |
# |
| |
unless ($gotstate) { |
| |
$lock = 0; |
| |
&Apache::lonnet::logthis('<font color="blue">WARNING: '. |
| |
'Could not read statemap '.$fn.' for '.$uri.'.</font>'); |
| |
&unlink_tmpfiles($fn); |
| |
if (flock(LOCKFILE,LOCK_EX|LOCK_NB)) { |
| |
$lock=1; |
| |
} |
| |
undef %randompick; |
| |
undef %randompickseed; |
| |
undef %randomorder; |
| |
undef %randomizationcode; |
| |
undef %hiddenurl; |
| |
undef %encurl; |
| |
undef %rescount; |
| |
undef %mapcount; |
| |
$errtext=''; |
| |
$retfrid=''; |
| |
# |
| |
# Once more through the routine of tying and loading and so on. |
| |
# |
| |
if ($lock) { |
| |
if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_WRCREAT(),0640)) { |
| |
if (tie(%parmhash,'GDBM_File',$fn.'_parms.db',&GDBM_WRCREAT(),0640)) { |
| |
$gotstate = &build_tmp_hashes($uri,$fn,$short,\%cenv); # TODO: User dependent? |
| |
unless ($gotstate) { |
| |
&Apache::lonnet::logthis('<font color="blue">WARNING: '. |
| |
'Failed to write statemap at second attempt '.$fn.' for '.$uri.'.</font>'); |
| |
} |
| |
unless (untie(%parmhash)) { |
| |
&Apache::lonnet::logthis('<font color="blue">WARNING: '. |
| |
'Could not untie coursemap parmhash '.$fn.'.db for '.$uri.'.</font>'); |
| |
} |
| |
} else { |
| |
&Apache::lonnet::logthis('<font color="blue">WARNING: '. |
| |
'Could not tie coursemap '.$fn.'__parms.db for '.$uri.'.</font>'); |
| |
} |
| |
unless (untie(%hash)) { |
| |
&Apache::lonnet::logthis('<font color="blue">WARNING: '. |
| |
'Could not untie coursemap hash '.$fn.'.db for '.$uri.'.</font>'); |
| |
} |
| |
} else { |
| |
&Apache::lonnet::logthis('<font color="blue">WARNING: '. |
| |
'Could not tie coursemap '.$fn.'.db for '.$uri.'.</font>'); |
| |
} |
| |
flock(LOCKFILE,LOCK_UN); |
| |
$lock = 0; |
| |
} else { |
| |
# Failed to get the immediate lock. |
| |
|
| |
&Apache::lonnet::logthis('<font color="blue">WARNING: '. |
| |
'Could not obtain lock to tie coursemap hash '.$fn.'.db for '.$uri.'.</font>'); |
| |
} |
| |
} |
| |
close(LOCKFILE); |
| |
unless (($errtext eq '') || ($env{'request.course.uri'} =~ m{^/uploaded/})) { |
| |
&Apache::lonmsg::author_res_msg($env{'request.course.uri'}, |
| |
$errtext); # TODO: User dependent? |
| |
} |
| |
# ------------------------------------------------- Check for critical messages |
| |
|
| |
# Depends on user must parameterize this as well..or separate as this is: |
| |
# more part of determining what someone sees on entering a course? |
| |
|
| |
my @what=&Apache::lonnet::dump('critical',$env{'user.domain'}, |
| |
$env{'user.name'}); |
| |
if ($what[0]) { |
| |
if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) { |
| |
$retfurl='/adm/email?critical=display'; |
| |
} |
| |
} |
| |
return ($retfurl,$errtext); |
| |
} |
| |
|
| |
# |
| |
# This sub is called when the course hash and the param hash have been tied and |
| |
# their lock file is held. |
| |
# Parameters: |
| |
# $uri - URI that identifies the course. |
| |
# $fn - The base path/filename of the files that make up the context |
| |
# being built. |
| |
# $short - Short course name. |
| |
# $cenvref - Reference to the course environment hash returned by |
| |
# Apache::lonnet::coursedescription |
| |
# |
| |
# Assumptions: |
| |
# The globals |
| |
# %hash, %paramhash are tied to their gdbm files and we hold the lock on them. |
| |
# |
| |
sub build_tmp_hashes { |
| |
my ($uri,$fn,$short,$cenvref) = @_; |
| |
|
| |
unless(ref($cenvref) eq 'HASH') { |
| |
return; |
| |
} |
| |
my %cenv = %{$cenvref}; |
| |
my $gotstate = 0; |
| |
%hash=(); # empty the global course and parameter hashes. |
| |
%parmhash=(); |
| |
$errtext=''; # No error messages yet. |
| $pc=0; |
$pc=0; |
| loadmap($uri); |
&clear_mapalias_count(); |
| |
&processversionfile(%cenv); |
| |
|
| |
# URI Of the map file. |
| |
|
| |
my $furi=&Apache::lonnet::clutter($uri); |
| |
# |
| |
# the map staring points. |
| |
# |
| |
$hash{'src_0.0'}=&versiontrack($furi); |
| |
$hash{'title_0.0'}=&Apache::lonnet::metadata($uri,'title'); |
| |
$hash{'ids_'.$furi}='0.0'; |
| |
$hash{'is_map_0.0'}=1; |
| |
|
| |
# Load the map.. note that loadmap may implicitly recurse if the map contains |
| |
# sub-maps. |
| |
|
| |
|
| |
&loadmap($uri,'0.0',$short); |
| |
|
| |
# The code below only executes if there is a starting point for the map> |
| |
# Q/BUG??? If there is no start resource for the map should that be an error? |
| |
# |
| |
|
| if (defined($hash{'map_start_'.$uri})) { |
if (defined($hash{'map_start_'.$uri})) { |
| |
&Apache::lonnet::appenv({"request.course.id" => $short, |
| |
"request.course.fn" => $fn, |
| |
"request.course.uri" => $uri, |
| |
"request.course.tied" => time}); |
| |
$env{'request.course.id'}=$short; |
| &traceroute('0',$hash{'map_start_'.$uri},'&'); |
&traceroute('0',$hash{'map_start_'.$uri},'&'); |
| &accinit($uri,$short,$fn); |
&accinit($uri,$short,$fn); |
| |
&hiddenurls(); |
| |
&mapcrumbs(); |
| |
} |
| |
$errtext .= &get_mapalias_errors(); |
| |
# ------------------------------------------------------- Put versions into src |
| |
foreach my $key (keys(%hash)) { |
| |
if ($key=~/^src_/) { |
| |
$hash{$key}=&putinversion($hash{$key}); |
| |
} elsif ($key =~ /^(map_(?:start|finish|pc)_)(.*)/) { |
| |
my ($type, $url) = ($1,$2); |
| |
my $value = $hash{$key}; |
| |
$hash{$type.&putinversion($url)}=$value; |
| |
} |
| } |
} |
| unless (untie(%hash)) { |
# ---------------------------------------------------------------- Encrypt URLs |
| &Apache::lonnet::logthis("<font color=blue>WARNING: ". |
foreach my $id (keys(%encurl)) { |
| "Could not untie coursemap $fn for $uri.</font>"); |
# $hash{'src_'.$id}=&Apache::lonenc::encrypted($hash{'src_'.$id}); |
| |
$hash{'encrypted_'.$id}=1; |
| } |
} |
| |
# ----------------------------------------------- Close hashes to finally store |
| |
# --------------------------------- Routine must pass this point, no early outs |
| |
$hash{'first_rid'}=$retfrid; |
| |
my ($mapid,$resid)=split(/\./,$retfrid); |
| |
$hash{'first_mapurl'}=$hash{'map_id_'.$mapid}; |
| |
my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$hash{'src_'.$retfrid}); |
| |
$retfurl=&add_get_param($hash{'src_'.$retfrid},{ 'symb' => $symb }); |
| |
if ($hash{'encrypted_'.$retfrid}) { |
| |
$retfurl=&Apache::lonenc::encrypted($retfurl,(&Apache::lonnet::allowed('adv') ne 'F')); |
| |
} |
| |
$hash{'first_url'}=$retfurl; |
| |
# ---------------------------------------------------- Store away initial state |
| { |
{ |
| my $cfh; |
my $cfh; |
| if ($cfh=Apache::File->new(">$fn.state")) { |
if (open($cfh,">","$fn.state")) { |
| print $cfh join("\n",@cond); |
print $cfh join("\n",@cond); |
| } else { |
$gotstate = 1; |
| &Apache::lonnet::logthis("<font color=blue>WARNING: ". |
} else { |
| "Could not write statemap $fn for $uri.</font>"); |
&Apache::lonnet::logthis("<font color=blue>WARNING: ". |
| } |
"Could not write statemap $fn for $uri.</font>"); |
| } |
} |
| } else { |
} |
| &Apache::lonnet::logthis("<font color=blue>WARNING: ". |
return $gotstate; |
| "Could not tie coursemap $fn for $uri.</font>"); |
} |
| } |
|
| return $errtext; |
sub unlink_tmpfiles { |
| |
my ($fn) = @_; |
| |
my $file_dir = dirname($fn); |
| |
|
| |
if ("$file_dir/" eq LONCAPA::tempdir()) { |
| |
my @files = qw (.db _symb.db .state _parms.db); |
| |
foreach my $file (@files) { |
| |
if (-e $fn.$file) { |
| |
unless (unlink($fn.$file)) { |
| |
&Apache::lonnet::logthis("<font color=blue>WARNING: ". |
| |
"Could not unlink ".$fn.$file."</font>"); |
| |
} |
| |
} |
| |
} |
| |
} |
| |
return; |
| |
} |
| |
|
| |
# ------------------------------------------------------- Evaluate state string |
| |
|
| |
sub evalstate { |
| |
my $fn=$env{'request.course.fn'}.'.state'; |
| |
my $state=''; |
| |
if (-e $fn) { |
| |
my @conditions=(); |
| |
{ |
| |
open(my $fh,"<",$fn); |
| |
@conditions=<$fh>; |
| |
close($fh); |
| |
} |
| |
my $safeeval = new Safe; |
| |
my $safehole = new Safe::Hole; |
| |
$safeeval->permit("entereval"); |
| |
$safeeval->permit(":base_math"); |
| |
$safeeval->deny(":base_io"); |
| |
$safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT'); |
| |
foreach my $line (@conditions) { |
| |
chomp($line); |
| |
my ($condition,$weight)=split(/\:/,$line); |
| |
if ($safeeval->reval($condition)) { |
| |
if ($weight eq 'force') { |
| |
$state.='3'; |
| |
} else { |
| |
$state.='2'; |
| |
} |
| |
} else { |
| |
if ($weight eq 'stop') { |
| |
$state.='0'; |
| |
} else { |
| |
$state.='1'; |
| |
} |
| |
} |
| |
} |
| |
} |
| |
&Apache::lonnet::appenv({'user.state.'.$env{'request.course.id'} => $state}); |
| |
return $state; |
| |
} |
| |
|
| |
# This block seems to have code to manage/detect doubly defined |
| |
# aliases in maps. |
| |
|
| |
{ |
| |
my %mapalias_cache; |
| |
sub count_mapalias { |
| |
my ($value,$resid) = @_; |
| |
push(@{ $mapalias_cache{$value} }, $resid); |
| |
} |
| |
|
| |
sub get_mapalias_errors { |
| |
my $error_text; |
| |
foreach my $mapalias (sort(keys(%mapalias_cache))) { |
| |
next if (scalar(@{ $mapalias_cache{$mapalias} } ) == 1); |
| |
my $count; |
| |
my $which = |
| |
join('</li><li>', |
| |
map { |
| |
my $id = $_; |
| |
if (exists($hash{'src_'.$id})) { |
| |
$count++; |
| |
} |
| |
my ($mapid) = split(/\./,$id); |
| |
&mt('Resource [_1][_2]in Map [_3]', |
| |
$hash{'title_'.$id},'<br />', |
| |
$hash{'title_'.$hash{'ids_'.$hash{'map_id_'.$mapid}}}); |
| |
} (@{ $mapalias_cache{$mapalias} })); |
| |
next if ($count < 2); |
| |
$error_text .= '<div class="LC_error">'. |
| |
&mt('Error: Found the mapalias "[_1]" defined multiple times.', |
| |
$mapalias). |
| |
'</div><ul><li>'.$which.'</li></ul>'; |
| |
} |
| |
&clear_mapalias_count(); |
| |
return $error_text; |
| |
} |
| |
sub clear_mapalias_count { |
| |
undef(%mapalias_cache); |
| |
} |
| } |
} |
| |
|
| 1; |
1; |
| __END__ |
__END__ |
| |
|
| |
=head1 NAME |
| |
|
| |
Apache::lonuserstate - Construct and maintain state and binary representation |
| |
of course for user |
| |
|
| |
=head1 SYNOPSIS |
| |
|
| |
Invoked by lonroles.pm. |
| |
|
| |
&Apache::lonuserstate::readmap($cdom.'/'.$cnum); |
| |
|
| |
=head1 INTRODUCTION |
| |
|
| |
This module constructs and maintains state and binary representation |
| |
of course for user. |
| |
|
| |
This is part of the LearningOnline Network with CAPA project |
| |
described at http://www.lon-capa.org. |
| |
|
| |
=head1 SUBROUTINES |
| |
|
| |
=over |
| |
|
| |
=item loadmap() |
| |
|
| |
Loads map from disk |
| |
|
| |
=item simplify() |
| |
|
| |
Simplify expression |
| |
|
| |
=item traceroute() |
| |
|
| |
Build condition hash |
| |
|
| |
=item accinit() |
| |
|
| |
Cascading conditions, quick access, parameters |
| |
|
| |
=item readmap() |
| |
|
| |
Read map and all submaps |
| |
|
| |
=item evalstate() |
| |
|
| |
Evaluate state string |
| |
|
| |
=back |
| |
|
| |
=cut |
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