--- rat/lonratsrv.pm	2000/07/01 17:55:31	1.1
+++ rat/lonratsrv.pm	2005/04/07 06:56:27	1.30
@@ -1,48 +1,369 @@
 # The LearningOnline Network with CAPA
 # Server for RAT Maps
 #
-# (Edit Handler for RAT Maps
-# (TeX Content Handler
+# $Id: lonratsrv.pm,v 1.30 2005/04/07 06:56:27 albertel 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/
 #
-# 05/29/00,05/30 Gerd Kortemeyer)
-# 7/1 Gerd Kortemeyer)
-# 7/1 Gerd Kortemeyer
 
 package Apache::lonratsrv;
 
 use strict;
 use Apache::Constants qw(:common);
+use Apache::File;
+use HTML::TokeParser;
+use Apache::lonnet;
+
+# ------------------------------------------------------------- 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,$errtext,$infotext)=@_;
+    if ($errtext) { return('',$errtext); }
+    my $outstr='';
+    my @obj=();
+    my @links=();
+    my $instr='';
+    if ($fn=~/^\/*uploaded\//) {
+        $instr=&Apache::lonnet::getfile($fn);
+    } elsif (-e $fn) {
+        my @content=();
+        {
+	    my $fh=Apache::File->new($fn);
+            @content=<$fh>;
+        }
+        $instr=join('',@content);
+    }
+    if ($instr eq -2) {
+        $errtext.='Map not loaded: An error occured while trying to load the map.';
+    } elsif ($instr) {
+        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,$errtext,$infotext);
+}
+
+
+# ----------------------------------------------------------- Saves map to disk
+
+sub savemap {
+    my ($fn,$errtext)=@_;
+    my $infotext='';
+    my %alltypes;
+    my %allvalues;
+    if (($fn=~/\.sequence(\.tmp)*$/) ||
+        ($fn=~/\.page(\.tmp)*$/)) {
+
+# ------------------------------------------------------------- Deal with input
+        my @tags=split(/<&>/,$env{'form.output'});
+        my $outstr='';
+        my $graphdef=0;
+        if ($tags[0] eq 'graphdef<:>yes') {
+	    $outstr='<map mode="rat/graphical">'."\n";
+            $graphdef=1;
+        } else {
+            $outstr="<map>\n";
+        }
+        foreach (@tags) {
+	   my @parts=split(/<:>/,$_);
+           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;
+               foreach (split(/:/,$parts[$#parts])) {
+                   my ($type,$name,$value)=split(/\_\_\_/,$_);
+                   $alltypes{$name}=$type;
+                   $allvalues{$name}=$value;
+               }
+               foreach (keys %allvalues) {
+                  if ($allvalues{$_} ne '') {
+                   $outstr.='<param to="'.$parts[1].'" type="'
+                          .$alltypes{$_}.'" name="'.$_
+                          .'" value="'.$allvalues{$_}.'">'
+                          ."</param>\n";
+	          }
+               }
+           } elsif (($parts[0] ne '') && ($graphdef)) {
+# ------------------------------------------------------------- Graphical input
+               $outstr.='<'.$parts[0];
+               if ($#parts==2) {
+		   $outstr.=' index="'.$parts[1].'"';
+               }
+               $outstr.=' value="'.qtescape($parts[$#parts]).'"></'.
+                        $parts[0].">\n";
+           }
+        }
+        $outstr.="</map>\n";
+	if ($fn=~/^\/*uploaded\/(\w+)\/(\w+)\/(.*)$/) {
+	    $env{'form.output'}=$outstr;
+            my $home=&Apache::lonnet::homeserver($2,$1);
+            my $result=&Apache::lonnet::finishuserfileupload($2,$1,$home,
+						'output',$3);
+	    if ($result != m|^/uploaded/|) {
+		$errtext.='Map not saved: A network error occured when trying to save the map. ';
+	    }
+        } else {
+          my $fh;
+          if ($fh=Apache::File->new(">$fn")) {
+             print $fh $outstr;
+             $infotext.="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,$infotext);
+}
 
 # ================================================================ Main Handler
 
 sub handler {
   my $r=shift;
-  $r->content_type('text/html');
+  &Apache::loncommon::content_type($r,'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 $lonDocRoot=$r->dir_config('lonDocRoot');
+  if ( $fn =~ /$lonDocRoot/ ) {
+      #internal authentication, needs fixup.
+      $fn = $url;
+      $fn=~s|^/~(\w+)|/home/$1/public_html|;
+      $fn=~s|/[^/]*/ratserver$||;
+  }
+  my $errtext='';
+  my $infotext='';
+  my $outtext='';
+
+  if ($mode ne 'loadonly') {
+     ($errtext,$infotext)=&savemap($fn,$errtext);
+  }
+  ($outtext,$errtext,$infotext)=&loadmap($fn,$errtext,$infotext);
 
   $r->print(<<ENDDOCUMENT);
 <html>
 <body bgcolor="#FFFFFF">
-<form name=storage method=post>
-<input type=hidden name=output>
+<form name=storage method=post action="$url">
+<input type=hidden name=output value="$outtext">
 </form>
-</body>
-</html>
-
+<script>
+    parent.flag=1;
+</script>
 ENDDOCUMENT
+    if (($errtext ne '') || ($infotext ne '')) {
+	$r->print(<<ENDSCRIPT);
+<script>
+    alert("$infotext $errtext");
+</script>
+ENDSCRIPT
+    }
+    $r->print("</body>\n</html>\n");
+
   return OK;
 }
 
 1;
 __END__
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