--- loncom/interface/spreadsheet/assesscalc.pm	2003/10/03 15:39:46	1.17.2.2
+++ loncom/interface/spreadsheet/assesscalc.pm	2003/09/05 01:57:54	1.19
@@ -1,5 +1,5 @@
 #
-# $Id: assesscalc.pm,v 1.17.2.2 2003/10/03 15:39:46 albertel Exp $
+# $Id: assesscalc.pm,v 1.19 2003/09/05 01:57:54 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -44,11 +44,12 @@ assesscalc
 package Apache::assesscalc;
 
 use strict;
+use warnings FATAL=>'all';
+no warnings 'uninitialized';
 use Apache::Constants qw(:common :http);
 use Apache::lonnet;
 use Apache::loncommon;
 use Apache::Spreadsheet;
-use Apache::loncoursedata();
 use HTML::Entities();
 use Spreadsheet::WriteExcel;
 use GDBM_File;
@@ -126,7 +127,6 @@ sub clear_package {
 
 sub initialize {
     &clear_package();
-    &Apache::loncoursedata::clear_internal_caches();
 }
 
 ########################################################
@@ -150,7 +150,6 @@ sub initialize_package {
     }
     &load_cached_export_rows();
     &load_parameter_caches();
-    &Apache::loncoursedata::clear_internal_caches();
 }
 
 ########################################################
@@ -170,7 +169,6 @@ sub load_parameter_caches {
     #
     # Course Parameters Cache
     if (! %courseopt) {
-        &Apache::lonnet::logthis("loading course options");
         $current_course = $ENV{'request.course.id'};
         undef(%courseopt);
         if (! defined($current_name) || ! defined($current_domain)) {
@@ -210,11 +208,17 @@ sub load_parameter_caches {
 ########################################################
 sub ensure_current_parameter_caches {
     my $self = shift;
+    ##
+    ## Check for a modified parameters
+    ##
     if (! defined($current_course) || 
         $current_course ne $ENV{'request.course.id'} ) {
         $current_course = $ENV{'request.course.id'};
         undef(%courseopt); 
     }
+    ##
+    ## Check for new user
+    ##
     if (! defined($current_name)   || $current_name ne $self->{'name'} ||
         ! defined($current_domain) || $current_domain ne $self->{'domain'}) {
         $current_domain = $self->{'domain'};
@@ -520,6 +524,9 @@ sub excel_rows {
 
 sub compute {
     my $self = shift;
+    my ($r) = @_;
+    my $connection = $r->connection();
+    if ($connection->aborted()) { $self->cleanup(); return; }
 #    $self->logthis('computing');
     $self->initialize_safe_space();
     #########################################
@@ -558,7 +565,9 @@ sub compute {
     }
     #
     # Get the values of the metadata fields
+    if ($connection->aborted()) { $self->cleanup(); return; }
     $self->ensure_current_parameter_caches();
+    if ($connection->aborted()) { $self->cleanup(); return; }
     my $filename = $self->{'coursefilename'}.'_parms.db';
     if (tie(%parmhash,'GDBM_File',
             $self->{'coursefilename'}.'_parms.db',&GDBM_READER(),0640)) {
@@ -570,6 +579,7 @@ sub compute {
     } else {
         $self->logthis('unable to tie '.$filename);
     }
+    if ($connection->aborted()) { $self->cleanup(); return; }
     #
     # Clean out unnecessary parameters
     foreach (keys(%parameters)) {
@@ -597,18 +607,17 @@ sub compute {
         while (my ($parm,$value) = each(%parameters)) {
             last if ($self->blackout());
             next if ($parm !~ /^(parameter_.*)_problemstatus$/);
-	    if ($parameters{$1.'_answerdate'} ne '' &&
-		$parameters{$1.'_answerdate'} < time) {
-		next;
-	    }
+            next if ($parameters{$1.'_answerdate'}<time);
             if (lc($value) eq 'no') {
                 # We must blackout this sheet
                 $self->blackout(1);
             }
         }
     }
+    if ($connection->aborted()) { $self->cleanup(); return; }
     #
     # Move the parameters into the spreadsheet
+    if ($connection->aborted()) { $self->cleanup(); return; }
     while (my ($parm,$value) = each(%parameters)) {
         my $cell = 'A'.$self->get_row_number_from_key($parm);
         $f{$cell} = $parm;
@@ -617,6 +626,7 @@ sub compute {
     }
     $self->formulas(\%f);
     $self->constants(\%c);
+    if ($connection->aborted()) { $self->cleanup(); return; }
     $self->calcsheet();
     #
     # Store export row in cache
@@ -627,6 +637,7 @@ sub compute {
     # Save the export data
     $self->save_export_data();
     $self->save() if ($self->need_to_save());
+    if ($connection->aborted()) { $self->cleanup(); return; }
     return;
 }
 
@@ -695,7 +706,7 @@ These rows are saved in the students dir
 ########################################################
 ########################################################
 sub load_cached_export_rows {
-    %Exportrows = undef;
+    undef(%Exportrows);
     my @tmp = &Apache::lonnet::dump('nohist_calculatedsheets_'.
                                     $ENV{'request.course.id'},
                                     $current_domain,$current_name,undef);
@@ -736,14 +747,19 @@ spreadsheet only if necessary.
 #############################################
 sub export_data {
     my $self = shift;
+    my ($r) = @_;
+    my $connection = $r->connection();
     my $symb = $self->{'symb'};
     if (! exists($ENV{'request.role.adv'}) || ! $ENV{'request.role.adv'} ||
         ! exists($Exportrows{$symb}) || ! defined($Exportrows{$symb})  ||
         ! $self->check_expiration_time($Exportrows{$symb}->{'time'}) ||
         ! exists($Exportrows{$symb}->{$self->{'filename'}}) ||
-        ! defined($Exportrows{$symb}->{$self->{'filename'}})) {
-        $self->compute();
+        ! defined($Exportrows{$symb}->{$self->{'filename'}}) ||
+        ! ref($Exportrows{$symb}->{$self->{'filename'}}) 
+        ) {
+        $self->compute($r);
     }
+    if ($connection->aborted()) { $self->cleanup(); return; }
     my @Data = @{$Exportrows{$symb}->{$self->{'filename'}}};
     if ($Data[0] =~ /^(.*)___=___/) {
         $self->{'sheetname'} = $1;