--- loncom/interface/Attic/lonspreadsheet.pm	2001/03/17 20:43:57	1.46
+++ loncom/interface/Attic/lonspreadsheet.pm	2001/04/05 21:35:02	1.53
@@ -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,
+# 03/19,03/20,03/21,03/27,04/05 Gerd Kortemeyer
 
 package Apache::lonspreadsheet;
             
@@ -23,6 +24,7 @@ use HTML::TokeParser;
 
 my %oldsheets;
 my %loadedcaches;
+my %expiredates;
 
 #
 # Cache for stores of an individual user
@@ -1091,9 +1093,17 @@ sub updatestudentassesssheet {
                        &GDBM_READER,0640)) {
 # --------------------------------------------------------- Get all assessments
 
-	my %allkeys=();
+	my %allkeys=('timestamp' => 
+                     'Timestamp of Last Transaction<br>timestamp');
         my %allassess=();
 
+        my $adduserstr='';
+        if ((&getuname($safeeval) ne $ENV{'user.name'}) ||
+            (&getudom($safeeval) ne $ENV{'user.domain'})) {
+            $adduserstr='&uname='.&getuname($safeeval).
+		'&udom='.&getudom($safeeval);
+        }
+
         map {
 	    if ($_=~/^src\_(\d+)\.(\d+)$/) {
 	       my $mapid=$1;
@@ -1106,7 +1116,8 @@ sub updatestudentassesssheet {
 			    '___'.$resid.'___'.
 			    &Apache::lonnet::declutter($srcf);
 		 $allassess{$symb}=
-    '<a href="/adm/assesscalc?usymb='.$symb.'">'.$bighash{'title_'.$id}.'</a>';
+	            '<a href="/adm/assesscalc?usymb='.$symb.$adduserstr.'">'.
+                     $bighash{'title_'.$id}.'</a>';
                  if ($stype eq 'assesscalc') {
                    map {
                        if (($_=~/^stores\_(.*)/) || ($_=~/^parameter\_(.*)/)) {
@@ -1258,7 +1269,7 @@ sub loadcourse {
 <script>
     popwin=open('','popwin','width=400,height=100');
     popwin.document.writeln('<html><body bgcolor="#FFFFFF">'+
-      '<h1>Spreadsheet Calculation Progress</h1>'+
+      '<h3>Spreadsheet Calculation Progress</h3>'+
       '<form name=popremain>'+
       '<input type=text size=35 name=remaining value=Starting></form>'+
       '</body></html>');
@@ -1486,6 +1497,37 @@ 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{$key.'.time'};
+    if ($ENV{'form.forcerecalc'}) { return 1; }
+    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) ||
+            &checkthis($uname.':'.$udom.':assesscalc:'.$map,$time) ||
+            &checkthis($uname.':'.$udom.':assesscalc:'.$usymb,$time)) {
+            return 1;
+        } 
+    } else {
+        if (&checkthis('::studentcalc:',$time) || 
+            &checkthis($uname.':'.$udom.':studentcalc:',$time)) {
+	    return 1;
+        }
+    }
+    return 0; 
+}
+
 # ============================================================== Export handler
 #
 # Non-interactive call from with program
@@ -1521,7 +1563,15 @@ sub exportsheet {
         } split(/\_\_\_\&\_\_\_/,$oldsheets{$key});
      }
  }
-
+#
+# Check if still valid
+#
+ if ($found) {
+     if (&forcedrecalc($uname,$udom,$stype,$usymb)) {
+	 $found='';
+     }
+ }
+ 
  if ($found) {
 #
 # Return what was cached
@@ -1543,7 +1593,7 @@ sub exportsheet {
 # Store now
 #
     my $cid=$ENV{'request.course.id'}; 
-    my $current=();
+    my $current='';
     if ($stype eq 'studentcalc') {
        $current=&Apache::lonnet::reply('get:'.
                                      $ENV{'course.'.$cid.'.domain'}.':'.
@@ -1575,13 +1625,15 @@ sub exportsheet {
         if ($newstore) { $newstore.='___&___'; }
         $newstore.=$_.'___=___'.$currentlystored{$_};
     } keys %currentlystored;
+    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:'.
@@ -1590,12 +1642,34 @@ sub exportsheet {
 			 ':nohist_calculatedsheets_'.
                          $ENV{'request.course.id'}.':'.
                          &Apache::lonnet::escape($key).'='.
-			 &Apache::lonnet::escape($newstore),
+			 &Apache::lonnet::escape($newstore).'&'.
+                         &Apache::lonnet::escape($key).'.time='.$now,
                          &getuhome($thissheet));
    }
  }
  return @exportarr;
 }
+# ============================================================ Expiration Dates
+#
+# Load previously cached student spreadsheets for this course
+#
+
+sub expirationdates {
+    undef %expiredates;
+    my $cid=$ENV{'request.course.id'};
+    my $reply=&Apache::lonnet::reply('dump:'.
+				     $ENV{'course.'.$cid.'.domain'}.':'.
+                                     $ENV{'course.'.$cid.'.num'}.
+				     ':nohist_expirationdates',
+                                     $ENV{'course.'.$cid.'.home'});
+    unless ($reply=~/^error\:/) {
+	map {
+            my ($name,$value)=split(/\=/,$_);
+            $expiredates{&Apache::lonnet::unescape($name)}
+                        =&Apache::lonnet::unescape($value);
+        } split(/\&/,$reply);
+    }
+}
 
 # ===================================================== Calculated sheets cache
 #
@@ -1779,6 +1853,17 @@ ENDSCRIPT
     $r->print('<h1>'.
             $ENV{'course.'.$ENV{'request.course.id'}.'.description'}.'</h1>');
 
+# ---------------------------------------------------- See if user can see this
+
+    if ((&gettype($asheet) eq 'classcalc') || 
+        (&getuname($asheet) ne $ENV{'user.name'}) ||
+        (&getudom($asheet) ne $ENV{'user.domain'})) {
+        unless (&Apache::lonnet::allowed('vgr',&getcid($asheet))) {
+	    $r->print(
+           '<h1>Access Permission Denied</h1></form></body></html>');
+            return OK;
+        }
+    }
 
 # ---------------------------------------------------- See if something to save
 
@@ -1801,6 +1886,26 @@ ENDSCRIPT
 
    &tmpwrite($asheet);
 
+# ---------------------------------------------------------- Additional options
+
+    $r->print(
+ '<input type=submit name=forcerecalc value="Completely Recalculate Sheet"><p>'
+		 );
+    if (&gettype($asheet) eq 'assesscalc') {
+       $r->print ('<p><font size=+2><a href="/adm/studentcalc?uname='.
+                                               &getuname($asheet).
+                                               '&udom='.&getudom($asheet).
+                  '">Level up: Student Sheet</a></font><p>');
+    }
+    
+    if ((&gettype($asheet) eq 'studentcalc') && 
+        (&Apache::lonnet::allowed('vgr',&getcid($asheet)))) {
+       $r->print (
+                   '<p><font size=+2><a href="/adm/classcalc">'.
+                   'Level up: Course Sheet</a></font><p>');
+    }
+    
+
 # ----------------------------------------------------------------- Save dialog
 
 
@@ -1817,6 +1922,8 @@ ENDSCRIPT
 
 # --------------------------------------------------------------- Cached sheets
 
+    &expirationdates();
+
     undef %oldsheets;
     undef %loadedcaches;
 
