--- loncom/metadata_database/searchcat.pl	2002/09/09 14:00:24	1.20
+++ loncom/metadata_database/searchcat.pl	2002/10/08 16:59:26	1.22
@@ -2,7 +2,7 @@
 # The LearningOnline Network
 # searchcat.pl "Search Catalog" batch script
 #
-# $Id: searchcat.pl,v 1.20 2002/09/09 14:00:24 harris41 Exp $
+# $Id: searchcat.pl,v 1.22 2002/10/08 16:59:26 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -44,8 +44,112 @@ use LONCAPA::Configuration;
 use IO::File;
 use HTML::TokeParser;
 use DBI;
+use GDBM_File;
 
 my @metalist;
+
+
+# ----------------------------------------------------- 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;
+}
+
+# -------------------------------------------------------- Escape Special Chars
+
+sub escape {
+    my $str=shift;
+    $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
+    return $str;
+}
+
+
+# ------------------------------------------- Code to evaluate dynamic metadata
+
+sub dynamicmeta {
+#
+#
+# Do nothing for now ...
+#
+#
+    return;
+#
+# ..., but stuff below already works
+#
+    my $url=&declutter(shift);
+    $url=~s/\.meta$//;
+    my %returnhash=();
+    my ($adomain,$aauthor)=($url=~/^(\w+)\/(\w+)\//);
+    my $prodir=&propath($adomain,$aauthor);
+    if (tie(%evaldata,'GDBM_File',
+            $prodir.'/nohist_resevaldata.db',&GDBM_WRCREAT,0640)) {
+       my %sum=();
+       my %cnt=();
+       my %listitems=('count'        => 'add',
+                      'course'       => 'add',
+                      'avetries'     => 'avg',
+                      'stdno'        => 'add',
+                      'difficulty'   => 'avg',
+                      'clear'        => 'avg',
+                      'technical'    => 'avg',
+                      'helpful'      => 'avg',
+                      'correct'      => 'avg',
+                      'depth'        => 'avg',
+                      'comments'     => 'app',
+                      'usage'        => 'cnt'
+                      );
+       my $regexp=$url;
+       $regexp=~s/(\W)/\\$1/g;
+       $regexp='___'.$regexp.'___([a-z]+)$';
+       foreach (keys %evaldata) {
+	 my $key=&unescape($_);
+	 if ($key=~/$regexp/) {
+	    my $ctype=$1;
+            if (defined($cnt{$ctype})) { 
+               $cnt{$ctype}++; 
+            } else { 
+               $cnt{$ctype}=1; 
+            }
+            unless ($listitems{$ctype} eq 'app') {
+               if (defined($sum{$ctype})) {
+                  $sum{$ctype}+=$evaldata{$_};
+   	       } else {
+                  $sum{$ctype}=$evaldata{$_};
+	       }
+            } else {
+               if (defined($sum{$ctype})) {
+                  if ($evaldata{$_}) {
+                     $sum{$ctype}.='<hr>'.$evaldata{$_};
+	          }
+ 	       } else {
+	             $sum{$ctype}=''.$evaldata{$_};
+	       }
+	    }
+	    if ($ctype eq 'count') {
+	       delete($evaldata{$_});
+            }
+	 }
+      }
+      foreach (keys %cnt) {
+         if ($listitems{$_} eq 'avg') {
+	     $returnhash{$_}=int(($sum{$_}/$cnt{$_})*100.0+0.5)/100.0;
+         } elsif ($listitems{$_} eq 'cnt') {
+             $returnhash{$_}=$cnt{$_};
+         } else {
+             $returnhash{$_}=$sum{$_};
+         }
+     }
+     if ($returnhash{'count'}) {
+         my $newkey=$$.'_'.time.'_searchcat___'.&escape($url).'___count';
+         $evaldata{$newkey}=$returnhash{'count'};
+     }
+     untie(%evaldata);
+   }
+   return %returnhash;
+}
+  
 # ----------------- Code to enable 'find' subroutine listing of the .meta files
 require "find.pl";
 sub wanted {
@@ -105,6 +209,7 @@ foreach my $m (@metalist) {
     my $ref=&metadata($m);
     my $m2='/res/'.&declutter($m);
     $m2=~s/\.meta$//;
+    &dynamicmeta($m2);
     my $q2="select * from metadata where url like binary '$m2'";
     my $sth = $dbh->prepare($q2);
     $sth->execute();