--- loncom/interface/Attic/lonspreadsheet.pm	2001/03/17 16:52:30	1.45
+++ loncom/interface/Attic/lonspreadsheet.pm	2001/03/20 20:11:27	1.47
@@ -4,7 +4,8 @@
 # 11/11,11/15,11/27,12/04,12/05,12/06,12/07,
 # 12/08,12/09,12/11,12/12,12/15,12/16,12/18,12/19,12/30,
 # 01/01/01,02/01,03/01,19/01,20/01,22/01,
-# 03/05,03/08,03/10,03/12,03/13,03/15,03/17 Gerd Kortemeyer
+# 03/05,03/08,03/10,03/12,03/13,03/15,03/17,
+# 03/19,03/20 Gerd Kortemeyer
 
 package Apache::lonspreadsheet;
             
@@ -22,6 +23,8 @@ use HTML::TokeParser;
 #
 
 my %oldsheets;
+my %loadedcaches;
+my %expiredates;
 
 #
 # Cache for stores of an individual user
@@ -1485,6 +1488,34 @@ sub loadrows {
     }
 }
 
+# ======================================================= Forced recalculation?
+
+sub checkthis {
+    my ($keyname,$time)=@_;
+    return ($time<$expiredates{$keyname});
+}
+sub forcedrecalc {
+    my ($uname,$udom,$stype,$usymb)=@_;
+    my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
+    my $time=$oldsheets{$key.'.time'};
+    unless ($time) { return 1; }
+    if ($stype eq 'assesscalc') {
+        my $map=(split(/\_\_\_/,$usymb))[0];
+        if (&checkthis('::assesscalc:',$time) ||
+            &checkthis('::assesscalc:'.$map,$time) ||
+            &checkthis('::assesscalc:'.$usymb,$time) ||
+            &checkthis($uname.':'.$udom.':assesscalc:',$time)) {
+            return 1;
+        } 
+    } else {
+        if (&checkthis('::studentcalc:',$time) || 
+            &checkthis($uname.':'.$udom.':studencalc:',$time)) {
+	    return 1;
+        }
+    }
+    return 0; 
+}
+
 # ============================================================== Export handler
 #
 # Non-interactive call from with program
@@ -1496,6 +1527,7 @@ sub exportsheet {
 #
 # Check if cached
 #
+
  my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
  my $found='';
 
@@ -1508,6 +1540,26 @@ sub exportsheet {
      } split(/\_\_\_\&\_\_\_/,$oldsheets{$key});
  }
 
+ unless ($found) {
+     &cachedssheets($uname,$udom,&Apache::lonnet::homeserver($uname,$udom));
+     if ($oldsheets{$key}) {
+        map {
+            my ($name,$value)=split(/\_\_\_\=\_\_\_/,$_);
+            if ($name eq $fn) {
+	        $found=$value;
+            }
+        } split(/\_\_\_\&\_\_\_/,$oldsheets{$key});
+     }
+ }
+#
+# Check if still valid
+#
+ if ($found) {
+     if (&forcedrecalc($uname,$udom,$stype,$usymb)) {
+	 $found='';
+     }
+ }
+ 
  if ($found) {
 #
 # Return what was cached
@@ -1517,7 +1569,8 @@ sub exportsheet {
  } else {
 #
 # Not cached
-# 
+#        
+
     my $thissheet=&makenewsheet($uname,$udom,$stype,$usymb);
     &readsheet($thissheet,$fn);
     &updatesheet($thissheet);
@@ -1528,12 +1581,24 @@ sub exportsheet {
 # Store now
 #
     my $cid=$ENV{'request.course.id'}; 
-    my $current=&Apache::lonnet::reply('get:'.
+    my $current='';
+    if ($stype eq 'studentcalc') {
+       $current=&Apache::lonnet::reply('get:'.
                                      $ENV{'course.'.$cid.'.domain'}.':'.
                                      $ENV{'course.'.$cid.'.num'}.
 				     ':nohist_calculatedsheets:'.
                                      &Apache::lonnet::escape($key),
                                      $ENV{'course.'.$cid.'.home'});
+    } else {
+       $current=&Apache::lonnet::reply('get:'.
+                                     &getudom($thissheet).':'.
+                                     &getuname($thissheet).
+				     ':nohist_calculatedsheets_'.
+                                     $ENV{'request.course.id'}.':'.
+                                     &Apache::lonnet::escape($key),
+                                     &getuhome($thissheet));
+
+    }
     my %currentlystored=();
     unless ($current=~/^error\:/) {
        map {
@@ -1548,30 +1613,43 @@ sub exportsheet {
         if ($newstore) { $newstore.='___&___'; }
         $newstore.=$_.'___=___'.$currentlystored{$_};
     } keys %currentlystored;
-    &Apache::lonnet::reply('put:'.
+    my $now=time;
+    if ($stype eq 'studentcalc') {
+       &Apache::lonnet::reply('put:'.
                          $ENV{'course.'.$cid.'.domain'}.':'.
                          $ENV{'course.'.$cid.'.num'}.
 			 ':nohist_calculatedsheets:'.
                          &Apache::lonnet::escape($key).'='.
-			 &Apache::lonnet::escape($newstore),
+			 &Apache::lonnet::escape($newstore).'&'.
+                         &Apache::lonnet::escape($key).'.time='.$now,
                          $ENV{'course.'.$cid.'.home'});
+   } else {
+       &Apache::lonnet::reply('put:'.
+                         &getudom($thissheet).':'.
+                         &getuname($thissheet).
+			 ':nohist_calculatedsheets_'.
+                         $ENV{'request.course.id'}.':'.
+                         &Apache::lonnet::escape($key).'='.
+			 &Apache::lonnet::escape($newstore).'&'.
+                         &Apache::lonnet::escape($key).'.time='.$now,
+                         &getuhome($thissheet));
+   }
  }
  return @exportarr;
 }
 
 # ===================================================== Calculated sheets cache
 #
-# Load all previously cached spreadsheets for this course
+# Load previously cached student spreadsheets for this course
 #
 
-sub cachedsheets {
+sub cachedcsheets {
     my $cid=$ENV{'request.course.id'};
     my $reply=&Apache::lonnet::reply('dump:'.
 				     $ENV{'course.'.$cid.'.domain'}.':'.
                                      $ENV{'course.'.$cid.'.num'}.
 				     ':nohist_calculatedsheets',
                                      $ENV{'course.'.$cid.'.home'});
-    undef %oldsheets;
     unless ($reply=~/^error\:/) {
 	map {
             my ($name,$value)=split(/\=/,$_);
@@ -1581,6 +1659,35 @@ sub cachedsheets {
     }
 }
 
+# ===================================================== Calculated sheets cache
+#
+# Load previously cached assessment spreadsheets for this student
+#
+
+sub cachedssheets {
+  my ($sname,$sdom,$shome)=@_;
+  unless (($loadedcaches{$sname.'_'.$sdom}) || ($shome eq 'no_host')) {
+    my $cid=$ENV{'request.course.id'};
+    my $reply=&Apache::lonnet::reply('dump:'.$sdom.':'.$sname.
+			             ':nohist_calculatedsheets_'.
+                                      $ENV{'request.course.id'},
+                                     $shome);
+    unless ($reply=~/^error\:/) {
+	map {
+            my ($name,$value)=split(/\=/,$_);
+            $oldsheets{&Apache::lonnet::unescape($name)}
+                      =&Apache::lonnet::unescape($value);
+        } split(/\&/,$reply);
+    }
+    $loadedcaches{$sname.'_'.$sdom}=1;
+  }
+}
+
+# ===================================================== Calculated sheets cache
+#
+# Load previously cached assessment spreadsheets for this student
+#
+
 # ================================================================ Main handler
 #
 # Interactive call to screen
@@ -1749,9 +1856,21 @@ ENDSCRIPT
 
     $r->print(&hiddenfield('ufn',&getfilename($asheet)));
 
-# ----------------------------------------------------------- Get cached sheets
+# --------------------------------------------------------------- Cached sheets
 
-    &cachedsheets();
+    undef %oldsheets;
+    undef %loadedcaches;
+
+    if (&gettype($asheet) eq 'classcalc') {
+        $r->print("Loading previously calculated student sheets ...<br>\n");
+        $r->rflush();
+        &cachedcsheets();
+    } elsif (&gettype($asheet) eq 'studentcalc') {
+        $r->print("Loading previously calculated assessment sheets ...<br>\n");
+        $r->rflush();
+        &cachedssheets(&getuname($asheet),&getudom($asheet),
+                       &getuhome($asheet));
+    }
 
 # ----------------------------------------------------- Update sheet, load rows