--- rat/lonuserstate.pm 2000/08/06 03:25:24 1.3 +++ rat/lonuserstate.pm 2001/11/29 19:23:49 1.25 @@ -1,6 +1,30 @@ # The LearningOnline Network with CAPA # Construct and maintain state and binary representation of course for user # +# $Id: lonuserstate.pm,v 1.25 2001/11/29 19:23:49 www Exp $ +# +# Copyright Michigan State University Board of Trustees +# +# This file is part of the LearningOnline Network with CAPA (LON-CAPA). +# +# LON-CAPA is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# LON-CAPA is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with LON-CAPA; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +# +# /home/httpd/html/adm/gpl.txt +# +# http://www.lon-capa.org/ +# # (Server for RAT Maps # # (Edit Handler for RAT Maps @@ -10,7 +34,10 @@ # 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 Gerd Kortemeyer +# 7/15,7/17,7/18,8/1,8/2,8/4,8/5,8/21,8/22,8/23,8/30, +# 9/2,9/4,9/29,9/30,10/2,10/11,10/30,10/31, +# 11/1,11/2,11/14,11/16,11/22,12/28, +# 07/05/01,08/30,08/31 Gerd Kortemeyer package Apache::lonuserstate; @@ -20,13 +47,19 @@ use Apache::File; use HTML::TokeParser; use Apache::lonnet(); use GDBM_File; +use Apache::lonmsg; +use Safe; +use Safe::Hole; +use Opcode; # ---------------------------------------------------- Globals for this package my $pc; # Package counter my %hash; # The big tied hash +my %parmhash;# The hash with the parameters my @cond; # Array with all of the conditions my $errtext; # variable with all errors +my $retfurl; # variable with the very first URL in the course # --------------------------------------------------------- Loads map from disk @@ -41,13 +74,14 @@ sub loadmap { my $fn='/home/httpd/html'.$uri; - unless (($fn=~/\.course$/) || - ($fn=~/\.sequence$/) || + unless (($fn=~/\.sequence$/) || ($fn=~/\.page$/)) { $errtext.="Invalid map: $fn\n"; return OK; } + my $ispage=($fn=~/\.page$/); + unless (-e $fn) { my $returned=Apache::lonnet::repcopy($fn); unless ($returned eq OK) { @@ -91,6 +125,18 @@ sub loadmap { $hash{'kind_'.$rid}='res'; $hash{'title_'.$rid}=$token->[2]->{'title'}; my $turi=$token->[2]->{'src'}; + unless ($ispage) { + $turi=~/\.(\w+)$/; + my $embstyle=&Apache::lonnet::fileembstyle($1); + if ($token->[2]->{'external'} eq 'true') { + $turi=~s/^http\:\/\//\/adm\/wrapper\/ext\//; + } else { + my $embstyle=&Apache::lonnet::fileembstyle($1); + if (($embstyle eq 'img') || ($embstyle eq 'emb')) { + $turi='/adm/wrapper'.$turi; + } + } + } $hash{'src_'.$rid}=$turi; if (defined($hash{'ids_'.$turi})) { @@ -99,7 +145,7 @@ sub loadmap { $hash{'ids_'.$turi}=''.$rid; } - if ($token->[2]->{'src'}=~/\/\//) { + if ($token->[2]->{'external'} eq 'true') { $hash{'ext_'.$rid}='true:'; } else { $hash{'ext_'.$rid}='false:'; @@ -116,8 +162,7 @@ sub loadmap { $hash{'type_'.$rid}='normal'; } - if (($turi=~/\.course$/) || - ($turi=~/\.sequence$/) || + if (($turi=~/\.sequence$/) || ($turi=~/\.page$/)) { $hash{'is_map_'.$rid}=1; &loadmap($turi); @@ -165,6 +210,23 @@ sub loadmap { } else { $hash{'from_'.$goesto}=''.$linkid; } + } elsif ($token->[1] eq 'param') { +# ------------------------------------------------------------------- Parameter + + my $referid=$lpc.'.'.$token->[2]->{'to'}; + my $part=$token->[2]->{'part'}; + unless ($part) { $part=0; } + my $newparam= + &Apache::lonnet::escape($token->[2]->{'type'}).':'. + &Apache::lonnet::escape($part.'.'. + $token->[2]->{'name'}).'='. + &Apache::lonnet::escape($token->[2]->{'value'}); + if (defined($hash{'param_'.$referid})) { + $hash{'param_'.$referid}.='&'.$newparam; + } else { + $hash{'param_'.$referid}=''.$newparam; + } + } } @@ -179,16 +241,14 @@ sub loadmap { sub simplify { my $expression=shift; -# "True and" is nothing - $expression=~s/0\&//g; # (8)=8 $expression=~s/\((\d+)\)/$1/g; # 8&8=8 - $expression=~s/(\d+)\&\1/$1/g; + $expression=~s/(\D)(\d+)\&\2(\D)/$1$2$3/g; # 8|8=8 - $expression=~s/(\d+)\|\1/$1/g; + $expression=~s/(\D)(\d+)\|\2(\D)/$1$2$3/g; # (5&3)&4=5&3&4 - $expression=~s/\((\d+)\&(\d+)\)\&(\d+)/$1\&$2\&$3/g; + $expression=~s/\((\d+)((?:\&\d+)+)\)\&(\d+\D)/$1$2\&$3/g; # (((5&3)|(4&6)))=((5&3)|(4&6)) $expression=~ s/\((\(\(\d+(?:\&\d+)*\)(?:\|\(\d+(?:\&\d+)*\))+\))\)/$1/g; @@ -205,6 +265,9 @@ sub traceroute { $sofar=simplify($sofar); unless ($beenhere=~/\&$rid\&/) { $beenhere.=$rid.'&'; + if ($retfurl eq '') { + $retfurl=$hash{'src_'.$rid}; + } if (defined($hash{'conditions_'.$rid})) { $hash{'conditions_'.$rid}=simplify( '('.$hash{'conditions_'.$rid}.')|('.$sofar.')'); @@ -238,44 +301,185 @@ sub traceroute { } } +# ------------------------------ Cascading conditions, quick access, parameters + +sub accinit { + my ($uri,$short,$fn)=@_; + my %acchash=(); + my %captured=(); + my $condcounter=0; + $acchash{'acc.cond.'.$short.'.0'}=0; + map { + if ($_=~/^conditions/) { + my $expr=$hash{$_}; + map { + my $sub=$_; + my $orig=$_; + $sub=~/\(\((\d+\&(:?\d+\&)*)(?:\d+\&*)+\)(?:\|\(\1(?:\d+\&*)+\))+\)/; + my $factor=$1; + $sub=~s/$factor//g; + $sub=~s/^\(/\($factor\(/; + $sub.=')'; + $sub=simplify($sub); + $orig=~s/(\W)/\\$1/g; + $expr=~s/$orig/$sub/; + } ($expr=~m/(\(\(\d+(?:\&\d+)+\)(?:\|\(\d+(?:\&\d+)+\))+\))/g); + $hash{$_}=$expr; + unless (defined($captured{$expr})) { + $condcounter++; + $captured{$expr}=$condcounter; + $acchash{'acc.cond.'.$short.'.'.$condcounter}=$expr; + } + } elsif ($_=~/^param_(\d+)\.(\d+)/) { + my $prefix=&Apache::lonnet::declutter($hash{'map_id_'.$1}). + '___'.$2.'___'.&Apache::lonnet::declutter($hash{'src_'.$1.'.'.$2}); + map { + my ($typename,$value)=split(/\=/,$_); + my ($type,$name)=split(/\:/,$typename); + $parmhash{$prefix.'.'.&Apache::lonnet::unescape($name)}= + &Apache::lonnet::unescape($value); + $parmhash{$prefix.'.'.&Apache::lonnet::unescape($name).'.type'}= + &Apache::lonnet::unescape($type); + } split(/\&/,$hash{$_}); + } + } keys %hash; + map { + if ($_=~/^ids/) { + map { + my $resid=$_; + my $uri=$hash{'src_'.$resid}; + $uri=~s/^\/adm\/wrapper//; + my @uriparts=split(/\//,$uri); + my $urifile=$uriparts[$#uriparts]; + $#uriparts--; + my $uripath=join('/',@uriparts); + $uripath=~s/^\/res\///; + if ($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}=~ + /(\&$urifile\:[^\&]*)/) { + my $replace=$1; + $acchash{'acc.res.'.$short.'.'.$uripath} + =~s/$replace/$replace\|$uricond/; + } else { + $acchash{'acc.res.'.$short.'.'.$uripath}.= + $urifile.':'.$uricond.'&'; + } + } else { + $acchash{'acc.res.'.$short.'.'.$uripath}= + '&'.$urifile.':'.$uricond.'&'; + } + } + } split(/\,/,$hash{$_}); + } + } keys %hash; + $acchash{'acc.res.'.$short.'.'}='&:0&'; + my $courseuri=$uri; + $courseuri=~s/^\/res\///; + &Apache::lonnet::delenv('(acc\.|httpref\.)'); + &Apache::lonnet::appenv(%acchash, + "request.course.id" => $short, + "request.course.fn" => $fn, + "request.course.uri" => $courseuri); +} + # ---------------------------------------------------- Read map and all submaps sub readmap { - my $uri=shift; + my $short=shift; + $short=~s/^\///; + my %cenv=&Apache::lonnet::coursedescription($short); + my $fn=$cenv{'fn'}; + my $uri; + $short=~s/\//\_/g; + unless ($uri=$cenv{'url'}) { + &Apache::lonnet::logthis("WARNING: ". + "Could not load course $short."); + return 'No course data available.'; + } @cond=('true:normal'); - %hash=(); - $errtext=''; - $pc=0; - loadmap($uri); - if (defined($hash{'map_start_'.$uri})) { - &traceroute('0',$hash{'map_start_'.$uri},'&'); + unlink($fn.'.db'); + unlink($fn.'_symb.db'); + unlink($fn.'.state'); + unlink($fn.'parms.db'); + $retfurl=''; + if ((tie(%hash,'GDBM_File',"$fn.db",&GDBM_WRCREAT,0640)) && + (tie(%parmhash,'GDBM_File',$fn.'_parms.db',&GDBM_WRCREAT,0640))) { + %hash=(); + %parmhash=(); + $errtext=''; + $pc=0; + loadmap($uri); + if (defined($hash{'map_start_'.$uri})) { + &traceroute('0',$hash{'map_start_'.$uri},'&'); + &accinit($uri,$short,$fn); + } + unless ((untie(%hash)) && (untie(%parmhash))) { + &Apache::lonnet::logthis("WARNING: ". + "Could not untie coursemap $fn for $uri."); + } + { + my $cfh; + if ($cfh=Apache::File->new(">$fn.state")) { + print $cfh join("\n",@cond); + } else { + &Apache::lonnet::logthis("WARNING: ". + "Could not write statemap $fn for $uri."); + } + } + } else { + &Apache::lonnet::logthis("WARNING: ". + "Could not tie coursemap $fn for $uri."); } + &Apache::lonmsg::author_res_msg($ENV{'request.course.uri'},$errtext); + return ($retfurl,$errtext); } -# ---------------------------------------------------------------- Testing only +# ------------------------------------------------------- Evaluate state string -sub handler { - my $r = shift; - $r->content_type('text/html'); - $r->send_http_header; - return OK if $r->header_only; - readmap('/res/msu/korte/foo.course'); - $r->print("\n"); - my $hashkey; - foreach $hashkey (sort keys %hash) { - $r->print("$hashkey: $hash{$hashkey}
\n"); - } - my $i; - $r->print('
'); - for ($i=0;$i<=$#cond;$i++) { - $r->print($i.' : '.$cond[$i]."
\n"); +sub evalstate { + + my $fn=$ENV{'request.course.fn'}.'.state'; + my $state='2'; + if (-e $fn) { + my @conditions=(); + { + my $fh=Apache::File->new($fn); + @conditions=<$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'); + map { + my $line=$_; + chomp($line); + my ($condition,$weight)=split(/\:/,$_); + if ($safeeval->reval($condition)) { + if ($weight eq 'force') { + $state.='3'; + } else { + $state.='2'; + } + } else { + if ($weight eq 'stop') { + $state.='0'; + } else { + $state.='1'; + } + } + } @conditions; } - $r->print("

$errtext

\n"); - return OK; + &Apache::lonnet::appenv('user.state.'.$ENV{'request.course.id'} => $state); + return $state; } - - 1; __END__