--- loncom/metadata_database/searchcat.pl	2002/05/17 14:03:04	1.18
+++ loncom/metadata_database/searchcat.pl	2002/10/18 13:54:31	1.24
@@ -2,7 +2,7 @@
 # The LearningOnline Network
 # searchcat.pl "Search Catalog" batch script
 #
-# $Id: searchcat.pl,v 1.18 2002/05/17 14:03:04 matthew Exp $
+# $Id: searchcat.pl,v 1.24 2002/10/18 13:54:31 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -44,8 +44,113 @@ use LONCAPA::Configuration;
 use IO::File;
 use HTML::TokeParser;
 use DBI;
+use GDBM_File;
+use POSIX qw(strftime mktime);
 
 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 {
@@ -56,8 +161,7 @@ sub wanted {
 }
 
 # ---------------  Read loncapa_apache.conf and loncapa.conf and get variables
-my $perlvarref=LONCAPA::Configuration::read_conf('loncapa_apache.conf',
-                                                 'loncapa.conf');
+my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
 my %perlvar=%{$perlvarref};
 undef $perlvarref; # remove since sensitive and not needed
 delete $perlvar{'lonReceipt'}; # remove since sensitive and not needed
@@ -74,6 +178,19 @@ my $dbh;
 	print "Cannot connect to database!\n";
 	exit;
     }
+    my $make_metadata_table = "CREATE TABLE IF NOT EXISTS metadata (".
+        "title TEXT, author TEXT, subject TEXT, url TEXT, keywords TEXT, ".
+        "version TEXT, notes TEXT, abstract TEXT, mime TEXT, language TEXT, ".
+        "creationdate DATETIME, lastrevisiondate DATETIME, owner TEXT, ".
+        "copyright TEXT, FULLTEXT idx_title (title), ".
+        "FULLTEXT idx_author (author), FULLTEXT idx_subject (subject), ".
+        "FULLTEXT idx_url (url), FULLTEXT idx_keywords (keywords), ".
+        "FULLTEXT idx_version (version), FULLTEXT idx_notes (notes), ".
+        "FULLTEXT idx_abstract (abstract), FULLTEXT idx_mime (mime), ".
+        "FULLTEXT idx_language (language), FULLTEXT idx_owner (owner), ".
+        "FULLTEXT idx_copyright (copyright)) TYPE=MYISAM";
+    # It would sure be nice to have some logging mechanism.
+    $dbh->do($make_metadata_table);
 }
 
 # ------------------------------------------------------------- get .meta files
@@ -93,6 +210,7 @@ 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);
     $sth->execute();
@@ -218,7 +336,30 @@ sub propath {
 # ---------------------------- convert 'time' format into a datetime sql format
 sub sqltime {
     my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) =
-	localtime(@_[0]);
+	localtime(&unsqltime(@_[0]));
     $mon++; $year+=1900;
     return "$year-$mon-$mday $hour:$min:$sec";
 }
+
+sub maketime {
+    my %th=@_;
+    return POSIX::mktime(
+        ($th{'seconds'},$th{'minutes'},$th{'hours'},
+         $th{'day'},$th{'month'}-1,$th{'year'}-1900,0,0,$th{'dlsav'}));
+}
+
+
+#########################################
+#
+# Retro-fixing of un-backward-compatible time format
+
+sub unsqltime {
+    my $timestamp=shift;
+    if ($timestamp=~/^(\d+)\-(\d+)\-(\d+)\s+(\d+)\:(\d+)\:(\d+)$/) {
+       $timestamp=&maketime(
+	   'year'=>$1,'month'=>$2,'day'=>$3,
+           'hours'=>$4,'minutes'=>$5,'seconds'=>$6);
+    }
+    return $timestamp;
+}
+