# The LearningOnline Network with CAPA
# Server for RAT Maps
#
# (Edit Handler for RAT Maps
# (TeX Content Handler
#
# 05/29/00,05/30 Gerd Kortemeyer)
# 7/1 Gerd Kortemeyer)
# 7/1,7/3,7/4,7/7,7/8,7/10,7/26,10/2 Gerd Kortemeyer
# 4/30/2001 Scott Harrison
# 5/3,06/25,07/03,07/04,07/05 Gerd Kortemeyer
package Apache::lonratsrv;
use strict;
use Apache::Constants qw(:common);
use Apache::File;
use HTML::TokeParser;
# ------------------------------------------------------------- From RAT to XML
sub qtescape {
my $str=shift;
$str=~s/\&\#58\;/\:/g;
$str=~s/\&\#39\;/\'/g;
$str=~s/\&\#44\;/\,/g;
$str=~s/\"/\&\#34\;/g;
return $str;
}
# ------------------------------------------------------------- From XML to RAT
sub qtunescape {
my $str=shift;
$str=~s/\:/\&colon\;/g;
$str=~s/\'/\&\#39\;/g;
$str=~s/\,/\&\#44\;/g;
$str=~s/\"/\&\#34\;/g;
return $str;
}
# --------------------------------------------------------- Loads map from disk
sub loadmap {
my ($fn,$errtext)=@_;
my $outstr='';
my @content=();
my @obj=();
my @links=();
if (-e $fn) {
{
my $fh=Apache::File->new($fn);
@content=<$fh>;
}
my $instr=join('',@content);
my $parser = HTML::TokeParser->new(\$instr);
my $token;
my $graphmode=0;
$fn=~/\.(\w+)$/;
$outstr="mode<:>$1";
while ($token = $parser->get_token) {
if ($token->[0] eq 'S') {
if ($token->[1] eq 'map') {
$graphmode=($token->[2]->{'mode'} eq 'rat/graphical');
} elsif ($token->[1] eq 'resource') {
# -------------------------------------------------------------------- Resource
$outstr.='<&>objcont';
if ($token->[2]->{'id'}) {
$outstr.='<:>'.$token->[2]->{'id'};
if ($obj[$token->[2]->{'id'}]==1) {
$errtext.='Error: multiple use of ID '.
$token->[2]->{'id'}.'. ';
}
$obj[$token->[2]->{'id'}]=1;
} else {
my $i=1;
while (($i<=$#obj) && ($obj[$i]!=0)) { $i++; }
$outstr.='<:>'.$i;
$obj[$i]=1;
}
$outstr.='<:>';
$outstr.=qtunescape($token->[2]->{'title'}).":";
$outstr.=qtunescape($token->[2]->{'src'}).":";
if ($token->[2]->{'external'} eq 'true') {
$outstr.='true:';
} else {
$outstr.='false:';
}
if ($token->[2]->{'type'}) {
$outstr.=$token->[2]->{'type'}.':';
} else {
$outstr.='normal:';
}
$outstr.='res';
} elsif ($token->[1] eq 'condition') {
# ------------------------------------------------------------------- Condition
$outstr.='<&>objcont';
if ($token->[2]->{'id'}) {
$outstr.='<:>'.$token->[2]->{'id'};
if ($obj[$token->[2]->{'id'}]==1) {
$errtext.='Error: multiple use of ID '.
$token->[2]->{'id'}.'. ';
}
$obj[$token->[2]->{'id'}]=1;
} else {
my $i=1;
while (($i<=$#obj) && ($obj[$i]!=0)) { $i++; }
$outstr.='<:>'.$i;
$obj[$i]=1;
}
$outstr.='<:>';
$outstr.=qtunescape($token->[2]->{'value'}).':';
if ($token->[2]->{'type'}) {
$outstr.=$token->[2]->{'type'}.':';
} else {
$outstr.='normal:';
}
$outstr.='cond';
} elsif ($token->[1] eq 'link') {
# ----------------------------------------------------------------------- Links
$outstr.='<&>objlinks';
if ($token->[2]->{'index'}) {
if ($links[$token->[2]->{'index'}]) {
$errtext.='Error: multiple use of link index '.
$token->[2]->{'index'}.'. ';
}
$outstr.='<:>'.$token->[2]->{'index'};
$links[$token->[2]->{'index'}]=1;
} else {
my $i=1;
while (($i<=$#links) && ($links[$i]==1)) { $i++; }
$outstr.='<:>'.$i;
$links[$i]=1;
}
$outstr.='<:>'.$token->[2]->{'from'}.
':'.$token->[2]->{'to'};
if ($token->[2]->{'condition'}) {
$outstr.=':'.$token->[2]->{'condition'};
} else {
$outstr.=':0';
}
# ------------------------------------------------------------------- Parameter
} elsif ($token->[1] eq 'param') {
$outstr.='<&>objparms<:>'.$token->[2]->{'to'}.'<:>'.
$token->[2]->{'type'}.'___'.$token->[2]->{'name'}
.'___'.$token->[2]->{'value'};
} elsif ($graphmode) {
# --------------------------------------------- All other tags (graphical only)
$outstr.='<&>'.$token->[1];
if (defined($token->[2]->{'index'})) {
$outstr.='<:>'.$token->[2]->{'index'};
if ($token->[1] eq 'obj') {
$obj[$token->[2]->{'index'}]=2;
}
}
$outstr.='<:>'.$token->[2]->{'value'};
}
}
}
} else {
$errtext.='Map not loaded: The file does not exist. ';
}
return($outstr,$errtext);
}
# ----------------------------------------------------------- Saves map to disk
sub savemap {
my ($fn,$errtext)=@_;
my %alltypes;
my %allvalues;
if (($fn=~/\.sequence$/) ||
($fn=~/\.page$/)) {
# ------------------------------------------------------------- Deal with input
my @tags=split(/<&>/,$ENV{'form.output'});
my $outstr='';
my $graphdef=0;
if ($tags[0] eq 'graphdef<:>yes') {
$outstr='<map mode="rat/graphical">'."\n";
$graphdef=1;
} else {
$outstr="<map>\n";
}
map {
my @parts=split(/<:>/,$_);
if ($parts[0] eq 'objcont') {
my @comp=split(/:/,$parts[$#parts]);
# --------------------------------------------------------------- Logical input
if ($comp[$#comp] eq 'res') {
$comp[0]=qtescape($comp[0]);
$comp[1]=qtescape($comp[1]);
if ($comp[2] eq 'true') {
if ($comp[1]!~/^http\:\/\//) {
$comp[1]='http://'.$comp[1];
}
$comp[1].='" external="true';
} else {
if ($comp[1]=~/^http\:\/\//) {
$comp[1]=~s/^http\:\/\/[^\/]*\//\//;
}
}
$outstr.='<resource id="'.$parts[1].'" src="'
.$comp[1].'"';
if (($comp[3] ne '') && ($comp[3] ne 'normal')) {
$outstr.=' type="'.$comp[3].'"';
}
if ($comp[0] ne '') {
$outstr.=' title="'.$comp[0].'"';
}
$outstr.="></resource>\n";
} elsif ($comp[$#comp] eq 'cond') {
$outstr.='<condition id="'.$parts[1].'"';
if (($comp[1] ne '') && ($comp[1] ne 'normal')) {
$outstr.=' type="'.$comp[1].'"';
}
$outstr.=' value="'.qtescape($comp[0]).'"';
$outstr.="></condition>\n";
}
} elsif ($parts[0] eq 'objlinks') {
my @comp=split(/:/,$parts[$#parts]);
$outstr.='<link';
$outstr.=' from="'.$comp[0].'"';
$outstr.=' to="'.$comp[1].'"';
if (($comp[2] ne '') && ($comp[2]!=0)) {
$outstr.=' condition="'.$comp[2].'"';
}
$outstr.=' index="'.$parts[1].'"';
$outstr.="></link>\n";
} elsif ($parts[0] eq 'objparms') {
undef %alltypes;
undef %allvalues;
map {
my ($type,$name,$value)=split(/\_\_\_/,$_);
$alltypes{$name}=$type;
$allvalues{$name}=$value;
} split(/:/,$parts[$#parts]);
map {
$outstr.='<param to="'.$parts[1].'" type="'
.$alltypes{$_}.'" name="'.$_
.'" value="'.$allvalues{$_}.'">'
."</param>\n";
} keys %allvalues;
} elsif (($parts[0] ne '') && ($graphdef)) {
# ------------------------------------------------------------- Graphical input
$outstr.='<'.$parts[0];
if ($#parts==2) {
$outstr.=' index="'.$parts[1].'"';
}
$outstr.=' value="'.qtescape($parts[$#parts]).'"></'.
$parts[0].">\n";
}
} @tags;
$outstr.="</map>\n";
{
my $fh;
if ($fh=Apache::File->new(">$fn")) {
print $fh $outstr;
$errtext.="Map saved as $fn. ";
} else {
$errtext.='Could not write file $fn. Map not saved. ';
}
}
} else {
# -------------------------------------------- Cannot write to that file, error
$errtext.='Map not saved: The specified path does not exist. ';
}
return $errtext;
}
# ================================================================ Main Handler
sub handler {
my $r=shift;
$r->content_type('text/html');
$r->send_http_header;
return OK if $r->header_only;
my $url=$r->uri;
$url=~/\/(\w+)\/ratserver$/;
my $mode=$1;
$url=~s/\/loadonly\/ratserver$/\/save\/ratserver/;
my $fn=$r->filename;
my $errtext='';
my $outtext='';
if ($mode ne 'loadonly') {
$errtext=&savemap($fn,$errtext);
}
($outtext,$errtext)=&loadmap($fn,$errtext);
$r->print(<<ENDDOCUMENT);
<html>
<body bgcolor="#FFFFFF">
<form name=storage method=post action="$url">
<input type=hidden name=output value="$outtext">
</form>
<script>
parent.flag=1;
</script>
ENDDOCUMENT
if ($errtext ne '') {
$r->print(<<ENDSCRIPT);
<script>
alert("$errtext");
</script>
ENDSCRIPT
}
$r->print("</body>\n</html>\n");
return OK;
}
1;
__END__
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>