--- rat/lonratsrv.pm	2000/07/01 17:55:31	1.1
+++ rat/lonratsrv.pm	2000/07/04 16:24:17	1.2
@@ -6,12 +6,176 @@
 #
 # 05/29/00,05/30 Gerd Kortemeyer)
 # 7/1 Gerd Kortemeyer)
-# 7/1 Gerd Kortemeyer
+# 7/1,7/3,7/4 Gerd Kortemeyer
 
 package Apache::lonratsrv;
 
 use strict;
 use Apache::Constants qw(:common);
+use Apache::File;
+use HTML::TokeParser;
+
+
+# ---------------------------------------------------------- Escape Quote Chars
+
+sub qtescape {
+    my $str=shift;
+    $str =~ s/([\"\%])/"%".unpack('H2',$1)/eg;
+    return $str;
+}
+
+# ----------------------------------------------------- Un-Escape Special Chars
+
+sub unescape {
+    my $str=shift;
+    $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
+    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 ($token->[1] eq 'resource') {
+                } elsif ($token->[1] eq 'condition') {
+                } elsif ($token->[1] eq 'link') {
+                    $outstr.='<&>objlinks';
+                    if ($graphmode) {
+			$outstr.='<:>'.$token->[2]->{'index'};
+                        @links[$token->[2]->{'index'}]=1;
+                    } else {
+                        my $i=1;
+                        while (($i<=$#links) && ($links[$i]==1)) { $i++; }
+                        $outstr.='<:>'.$i;
+		    }
+                    $outstr.='<:>'.$token->[2]->{'from'}.
+                             '<:>'.$token->[2]->{'to'};
+                    if ($token->[2]->{'condition'}) {
+			$outstr.='<:>'.$token->[2]->{'condition'};
+                    } else {
+ 			$outstr.='<:>0';
+                   }
+                } elsif ($graphmode) {
+                }
+            }
+        }
+
+    } else {
+        $errtext.='Map not loaded: The file does not exist.';
+    }
+    return($outstr,$errtext);
+}
+
+
+# ----------------------------------------------------------- Saves map to disk
+
+sub savemap {
+    my ($fn,$errtext)=@_;
+    if (($fn=~/\.course$/) ||
+        ($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]=~s/\&\#(\d+)\;/pack("C",$1)/eg;
+                   $comp[1]=~s/\&\#(\d+)\;/pack("C",$1)/eg;
+                   if ($comp[2] eq 'true') {
+		       if ($comp[1]!~/^http\:\/\//) {
+			   $comp[1]='http://'.$comp[1];
+                       }
+                   } else {
+		       if ($comp[1]=~/^http\:\/\//) {
+			   $comp[1]=~s/^http\:\/\/[^\/]*\//\//;
+                       }
+                   }
+		   $outstr.='<resource id="'.$parts[1].'" src="'
+                          .qtescape($comp[1]).'"';
+
+                   if (($comp[3] ne '') && ($comp[3] ne 'normal')) {
+		       $outstr.=' type="'.$comp[3].'"';
+                   }
+                   if ($comp[0] ne '') {
+		       $outstr.=' title="'.qtescape($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] 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
 
@@ -23,17 +187,36 @@ sub handler {
   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);
 
   $r->print(<<ENDDOCUMENT);
 <html>
 <body bgcolor="#FFFFFF">
-<form name=storage method=post>
-<input type=hidden name=output>
+<form name=storage method=post action="$url">
+<input type=hidden name=output value="$outtext">
 </form>
-</body>
-</html>
-
 ENDDOCUMENT
+    if ($errtext ne '') {
+	$r->print(<<ENDSCRIPT);
+<script>
+    alert("$errtext");
+</script>
+ENDSCRIPT
+    }
+    $r->print("</body>\n</html>\n");
+
   return OK;
 }