--- loncom/html/adm/helper/newslot.helper	2010/10/31 15:32:15	1.27
+++ loncom/html/adm/helper/newslot.helper	2018/06/27 14:35:09	1.30.4.1
@@ -112,6 +112,20 @@
         </validator>
       </date>
       <message>
+        </p><p>Time students can no longer reserve:<br />&nbsp;&nbsp;&nbsp;
+      </message>
+      <date variable="endreserve" hoursminutes="1" anytime="1">
+        <defaultvalue>
+          return &{$helper->{DATA}{origslot}}('endreserve','anytime');
+        </defaultvalue>
+        <validator>
+           if (defined($val) && $val > $helper->{'VARS'}{'starttime'}) {
+               return 'Reservation end time must come before the slot has started.';
+           }
+           return undef;
+        </validator>
+      </date>
+      <message>
          </p><p>Maximum number of students allowed in this slot:<br />&nbsp;&nbsp;&nbsp;
       </message>
       <string variable="maxspace" size="4">
@@ -168,12 +182,36 @@
       <clause>$helper->{'VARS'}{'type'} eq 'preassigned'</clause>
       <exec>
         delete($helper->{'VARS'}{'startreserve'});
+        delete($helper->{'VARS'}{'endreserve'});
         delete($helper->{'VARS'}{'maxspace'});
-        delete($helper->{'VARS'}{'startunique'});
-        delete($helper->{'VARS'}{'endunique'});
       </exec>
+      <message>
+         </p><p>Period of time when this slot can only be uniquely assigned:<br />&nbsp;&nbsp;&nbsp;Start:
+      </message>
+      <date variable="startunique" hoursminutes="1" anytime="1">
+        <defaultvalue>
+          my $default=&{$helper->{DATA}{origslot}}('uniqueperiod','anytime');
+          if ($default eq 'anytime') { return 'anytime' };
+          if (ref($default)) { return $default->[0]; }
+          return 'anytime';
+        </defaultvalue>
+      </date>
+      <message><br />&nbsp;&nbsp;&nbsp;End: </message>
+      <date variable="endunique" hoursminutes="1" anytime="1">
+        <defaultvalue>
+          my $default=&{$helper->{DATA}{origslot}}('uniqueperiod','anytime');
+          if ($default eq 'anytime') { return 'anytime' };
+          if (ref($default)) { return $default->[1]; }
+          return 'anytime';
+        </defaultvalue>
+        <validator>
+           if (defined($val) && $val < $helper->{'VARS'}{'startunique'}) {
+               return 'End time must be later than the start time.';
+           }
+           return undef;
+        </validator>
+      </date>
     </condition>
-
     <message>
       </p><p>Proctored access:
     </message>
@@ -299,7 +337,7 @@
   </state>
 
 
-  <state name="FINISH" title="Creating/Modfying Slot">
+  <state name="FINISH" title="Creating/Modifying Slot">
 	    <message> Created Slot  </message>	
     <final>
       <finalcode>
@@ -330,6 +368,10 @@
 		$slot{'startreserve'} = $helper->{'VARS'}{'startreserve'};
 	}
 
+        if ( $helper->{'VARS'}{'endreserve'} > 0) {
+            $slot{'endreserve'} = $helper->{'VARS'}{'endreserve'};
+        }
+
 	if ( $helper->{'VARS'}{'startunique'} > 0 &&
 	     $helper->{'VARS'}{'endunique'} > 0 ) {
 	    $slot{'uniqueperiod'} = [$helper->{'VARS'}{'startunique'},
@@ -377,6 +419,9 @@
         my $ret = &Apache::lonnet::cput('slots',
 					{$helper->{'VARS'}{'name'} => \%slot},
 					$cdom,$cname);
+        if ($ret eq 'ok') {
+            &Apache::lonnet::devalidate_slots_cache($cname,$cdom);
+        }
         $result.="\n ".'Name: '.&HTML::Entities::encode($helper->{'VARS'}{'name'}).'</li>'.
     "\n".'<li> Starts: '.&Apache::lonlocal::locallocaltime($slot{'starttime'}).'</li>'.
                  "\n".'<li> Ends: '.&Apache::lonlocal::locallocaltime($slot{'endtime'}).'</li>'.
@@ -395,6 +440,11 @@
 		    &Apache::lonlocal::locallocaltime($slot{'startreserve'}).'</li>';
 	}
 
+        if (exists($slot{'endreserve'})) {
+            $result.="\n".'<li> '.$labels{'endreserve'}.': '.
+                    &Apache::lonlocal::locallocaltime($slot{'endreserve'}).'</li>';
+        }
+
         if (exists($slot{'reservationmsg'})) {
             my %options = &Apache::slotrequest::slot_reservationmsg_options();
             $result.="\n".'<li> '.$labels{'reservationmsg'}.': '.