--- loncom/interface/slotrequest.pm	2006/06/30 04:28:18	1.68
+++ loncom/interface/slotrequest.pm	2018/07/02 20:34:52	1.139
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Handler for requesting to have slots added to a students record
 #
-# $Id: slotrequest.pm,v 1.68 2006/06/30 04:28:18 albertel Exp $
+# $Id: slotrequest.pm,v 1.139 2018/07/02 20:34:52 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -37,7 +37,7 @@ use Apache::lonnet;
 use Apache::lonnavmaps();
 use Date::Manip;
 use lib '/home/httpd/lib/perl/';
-use LONCAPA;
+use LONCAPA qw(:DEFAULT :match);
 
 sub fail {
     my ($r,$code)=@_;
@@ -56,8 +56,22 @@ sub fail {
 }
 
 sub start_page {
-    my ($r,$title)=@_;
-    $r->print(&Apache::loncommon::start_page($title));
+    my ($r,$title,$brcrum,$js)=@_;
+    my $args;
+    if (ref($brcrum) eq 'ARRAY') {
+        $args = {bread_crumbs => $brcrum};
+    }
+    if (($env{'form.requestattempt'}) || ($env{'form.command'} eq 'manageresv')) {
+        my %loaditems = (
+                           onload => 'javascript:uncheckSlotRadio();',
+                        );
+        if (ref($args) eq 'HASH') {
+            $args->{'add_entries'} = \%loaditems;
+        } else {
+            $args = { 'add_entries' => \%loaditems };
+        }
+    }
+    $r->print(&Apache::loncommon::start_page($title,$js,$args));
 }
 
 sub end_page {
@@ -65,6 +79,291 @@ sub end_page {
     $r->print(&Apache::loncommon::end_page());
 }
 
+sub reservation_js {
+    my ($slots,$consumed_uniqueperiods,$available,$got_slots,$symb) = @_;
+    return unless ((ref($slots) eq 'HASH') && (ref($available) eq 'ARRAY'));
+    my $toskip;
+    if ($symb eq '') {
+        $toskip = { symb => 1, };
+    }
+    my ($i,$j) = (0,0);
+    my $js;
+    foreach my $slot (sort
+        { return $slots->{$a}->{'starttime'} <=> $slots->{$b}->{'starttime'} }
+                    (keys(%{$slots})))  {
+
+        next if (!&allowed_slot($slot,$slots->{$slot},$symb,$slots,
+                                $consumed_uniqueperiods,$toskip));
+        $js .= "    slotstart[$i]='$slots->{$slot}->{'starttime'}';\n".
+               "    slotend[$i]='$slots->{$slot}->{'endtime'}';\n".
+               "    slotname[$i]='$slot';\n";
+        if (($symb) && (ref($got_slots) eq 'ARRAY')) {
+            if (grep(/^\Q$slot\E$/,@{$got_slots})) {
+                $js .= "    currslot[$j]='$slot';\n";
+                $j++;
+            }
+        }
+        $i++;
+        push(@{$available},$slot);
+    }
+    if ($j) {
+        $js = "    var currslot = new Array($j);\n\n$js";
+    }
+    my %alerts = &Apache::lonlocal::texthash (
+                                                none    => 'No reservable time slots found',
+                                                invalid => 'Invalid date format',
+                                             );
+    return <<"ENDSCRIPT";
+<script type="text/javascript">
+// <![CDATA[
+function updateSlotDisplay(form,num,slotpickradio) {
+    var slotstart = new Array($i);
+    var slotend = new Array($i);
+    var slotname = new Array($i);
+$js
+
+    if (slotpickradio == 'all') {
+        for (var i=0; i<$i; i++) {
+            if (document.getElementById('LC_slotrow_'+num+'_'+slotname[i])) {
+                document.getElementById('LC_slotrow_'+num+'_'+slotname[i]).style.display = '';
+            }
+            if (document.getElementById('LC_slotsearch_'+num)) {
+                document.getElementById('LC_slotsearch_'+num).style.display = 'block';
+            }
+        }
+    } else {
+        if (slotpickradio == 'show') {
+            for (var i=0; i<$i; i++) {
+                if (document.getElementById('LC_slotrow_'+num+'_'+slotname[i])) {
+                    document.getElementById('LC_slotrow_'+num+'_'+slotname[i]).style.display = 'none';
+                }
+            }
+            for (var j=0; j<$j; j++) {
+                if (document.getElementById('LC_slotrow_'+num+'_'+currslot[j])) {
+                    document.getElementById('LC_slotrow_'+num+'_'+currslot[j]).style.display = '';
+                }
+            }
+            if (document.getElementById('LC_slotsearch_'+num)) {
+                document.getElementById('LC_slotsearch_'+num).style.display = 'block';
+            }
+        } else {
+            var numberRegExp = /^[0-9]+\$/;
+            var startm = form.start_month.options[form.start_month.selectedIndex].value;
+            var startd = form.start_day.value;
+            startd=startd.trim();
+            var starty = form.start_year.value;
+            starty=starty.trim();
+            var endm = form.end_month.options[form.end_month.selectedIndex].value;
+            var endd = form.end_day.value;
+            endd=endd.trim();
+            var endy = form.end_year.value;
+            endy=endy.trim();
+            if (numberRegExp.test(endd) && numberRegExp.test(endy) && numberRegExp.test(startd) && numberRegExp.test(starty)) {
+                var startdate = startm+"/"+startd+"/"+starty;
+                var starttime = new Date(startdate).getTime();
+                starttime = starttime/1000;
+                var starth = form.start_hour.options[form.start_hour.selectedIndex].value;
+                if (numberRegExp.test(starth)) {
+                    starth = parseInt(starth);
+                    if (starth > 0 && starth <= 23) {
+                        starttime += 3600 * starth;
+                    }
+                }
+                var enddate = endm+"/"+endd+"/"+endy;
+                var endtime = new Date(enddate).getTime();
+                endtime = endtime/1000;
+                var endh = form.end_hour.options[form.end_hour.selectedIndex].value;
+                if (numberRegExp.test(endh)) {
+                    endh = parseInt(endh);
+                    if (endh > 0 && endh <= 23) {
+                        endtime += 3600 * endh;
+                    }
+                }
+
+                var shown = 0;
+                for (var i=0; i<$i; i++) {
+                    if ((slotstart[i] >= starttime) && (slotend[i] <= endtime)) {
+                        if (document.getElementById('LC_slotrow_'+num+'_'+slotname[i])) {
+                            document.getElementById('LC_slotrow_'+num+'_'+slotname[i]).style.display = '';
+                            shown ++;
+                        }
+                    } else {
+                        if (document.getElementById('LC_slotrow_'+num+'_'+slotname[i])) {
+                            document.getElementById('LC_slotrow_'+num+'_'+slotname[i]).style.display = 'none';
+                        }
+                    }
+                }
+                if (document.getElementById('LC_slotsearch_'+num)) {
+                    if (shown) {
+                        document.getElementById('LC_slotsearch_'+num).style.display = 'block';
+                    } else {
+                        document.getElementById('LC_slotsearch_'+num).style.display = 'none';
+                    }
+                }
+                if (shown == 0) {
+                    alert('$alerts{"none"}');
+                }
+            } else {
+                alert('$alerts{"invalid"}');
+            }
+        }
+    }
+    return;
+}
+
+function toggleSlotDisplay(form,num) {
+    if (form.slotpick.length) {
+        for (var i=0; i<form.slotpick.length; i++) {
+            if (form.slotpick[i].checked) {
+                var val = form.slotpick[i].value;
+                if (document.getElementById('LC_slotfilter_'+num)) {
+                    document.getElementById('LC_slotsearch_'+num).style.display = 'none';
+                    if (val == 'filter') {
+                        document.getElementById('LC_slotfilter_'+num).style.display = 'block';
+                    } else {
+                        document.getElementById('LC_slotfilter_'+num).style.display = 'none';
+                        if (val == 'all') {
+                            updateSlotDisplay(form,num,val);
+                        } else {
+                            updateSlotDisplay(form,num,val);
+                        }
+                    }
+                }
+                break;
+            }
+        }
+    }
+    return false;
+}
+
+if (!document.getElementsByClassName) {
+    function getElementsByClassName(node, classname) {
+        var a = [];
+        var re = new RegExp('(^| )'+classname+'( |$)');
+        var els = node.getElementsByTagName("*");
+        for(var i=0,j=els.length; i<j; i++)
+            if(re.test(els[i].className))a.push(els[i]);
+        return a;
+    }
+}
+
+function uncheckSlotRadio() {
+    var slotpicks;
+    if (document.getElementsByClassName) {
+        slotpicks = document.getElementsByClassName('LC_slotpick_radio');
+    } else {
+        slotpicks = getElementsByClassName(document.body,'LC_slotpick_radio');
+    }
+    if (slotpicks.length) {
+        for (var i=0; i<slotpicks.length; i++) {
+            slotpicks[i].checked = false;  
+        }
+    }
+}
+
+function toggleSlotMap(maprownum,rownum) {
+    if (document.getElementById('arrow'+maprownum)) {
+        var img = document.getElementById('arrow'+maprownum);
+        var rowdisplay;
+        var celldisplay = '';
+        if (img.src.indexOf('arrow.open.gif')!=-1) {
+            img.src = '/adm/lonIcons/arrow.closed.gif';
+            rowdisplay = 'none';
+        }
+        else {
+            img.src = '/adm/lonIcons/arrow.open.gif';
+            rowdisplay = 'table-row';
+            celldisplay = 'none';
+        }
+        var resrows;
+        var maptext;
+        if (document.getElementsByClassName) {
+            resrows = document.getElementsByClassName('LC_slotresrow_'+maprownum);
+            maptext = document.getElementsByClassName('LC_slotmaptext_'+maprownum);
+        } else {
+            resrows = getElementsByClassName(document.body,'LC_slotresrow_'+maprownum);
+            maptext = getElementsByClassName(document.body,'LC_slotmaptext_'+maprownum);
+        }
+        if (maptext.length) {
+            for (var i=0; i<maptext.length; i++) {
+                maptext[i].style.display = celldisplay;
+            }
+        }
+        if (resrows.length) {
+           var mapbgidx = 0;
+           var rowclasses = ['LC_even_row','LC_odd_row'];
+           var mapbgClass = 'LC_even_row';
+           var regExpBg = /LC_odd_row/i;
+           if (rowdisplay == 'table-row') {
+                if (document.getElementById('LC_slotmaprow_'+rownum)) {
+                    mapbgClass = document.getElementById('LC_slotmaprow_'+rownum).className;
+                    if (regExpBg.test(mapbgClass)) {
+                        mapbgidx = 1;
+                    }
+                }
+            }
+            for (var i=0; i<resrows.length; i++) {
+                resrows[i].style.display = rowdisplay;
+                if (rowdisplay == 'table-row') {
+                    mapbgidx ++;        
+                    var bgcolnew = mapbgidx % 2;
+                    var bgcolold = (mapbgidx+1) % 2;
+                    var k = i+parseInt(rownum)+1; 
+                    if (document.getElementById('LC_slotresrow_'+k)) {
+                        document.getElementById('LC_slotresrow_'+k).className = document.getElementById('LC_slotresrow_'+k).className.replace(rowclasses[bgcolold],rowclasses[bgcolnew]);
+                    }
+                }
+            }
+            if (document.getElementById('LC_slot_reservations')) {
+                var numrowsOdd = resrows.length % 2;
+                if (numrowsOdd) {
+                    var lastbgClass = 'LC_even_row';
+                    var idx = 0;
+                    var lastresnum = parseInt(rownum) + resrows.length; 
+                    if (rowdisplay == 'none') {
+                        lastresnum = rownum;
+                        if (document.getElementById('LC_slotmaprow_'+rownum)) {
+                            lastbgClass = document.getElementById('LC_slotmaprow_'+rownum).className;
+                        }
+                    } else {
+                        lastresnum = parseInt(rownum) + resrows.length;
+                        if (document.getElementById('LC_slotresrow_'+lastresnum)) {
+                            lastbgClass = document.getElementById('LC_slotresrow_'+lastresnum).className;
+                        }
+                    }
+                    if (regExpBg.test(lastbgClass)) {
+                        idx = 1;
+                    }
+                    var table = document.getElementById('LC_slot_reservations');
+                    if ((table.rows.length) && (table.rows.length >= lastresnum)) {
+                        for (var i=lastresnum; i<table.rows.length; i++) {
+                            if (table.rows[i].style.display != 'none') {
+                                idx ++;
+                                var bgcolnew = idx % 2;
+                                var bgcolold = (idx+1) % 2;  
+                                j = i+1;
+                                if (document.getElementById('LC_slotmaprow_'+j)) {
+                                    document.getElementById('LC_slotmaprow_'+j).className = rowclasses[bgcolnew];
+                                } else {
+                                    if (document.getElementById('LC_slotresrow_'+j)) {
+                                        document.getElementById('LC_slotresrow_'+j).className = document.getElementById('LC_slotresrow_'+j).className.replace(rowclasses[bgcolold],rowclasses[bgcolnew]);
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+// ]]>
+</script>
+ENDSCRIPT
+
+}
+
+
 =pod
 
  slot_reservations db
@@ -77,7 +376,7 @@ sub end_page {
 =cut
 
 sub get_course {
-    (undef,my $courseid)=&Apache::lonxml::whichuser();
+    (undef,my $courseid)=&Apache::lonnet::whichuser();
     my $cdom=$env{'course.'.$courseid.'.domain'};
     my $cnum=$env{'course.'.$courseid.'.num'};
     return ($cnum,$cdom);
@@ -117,7 +416,6 @@ sub check_for_reservation {
     my ($symb,$mode)=@_;
     my $student = &Apache::lonnet::EXT("resource.0.availablestudent", $symb,
 				       $env{'user.domain'}, $env{'user.name'});
-
     my $course = &Apache::lonnet::EXT("resource.0.available", $symb,
 				    $env{'user.domain'}, $env{'user.name'});
     my @slots = (split(/:/,$student), split(/:/, $course));
@@ -133,22 +431,20 @@ sub check_for_reservation {
 	return 'error: Unable to determine current status';
     }    
     my @got;
-    foreach my $slot_name (sort {
-	if (ref($slots{$a}) && ref($slots{$b})) {
-	    return $slots{$a}{'starttime'} <=> $slots{$b}{'starttime'}
-	}
-	if (ref($slots{$a})) { return -1;}
-	if (ref($slots{$b})) { return 1;}
-	return 0;
-    } @slots) {
+    my @sorted_slots = &Apache::loncommon::sorted_slots(\@slots,\%slots,'starttime');
+    foreach my $slot_name (@sorted_slots) {
 	next if (!defined($slots{$slot_name}) ||
 		 !ref($slots{$slot_name}));
 	&Apache::lonxml::debug(time." $slot_name ".
 			       $slots{$slot_name}->{'starttime'}." -- ".
-			       $slots{$slot_name}->{'startreserve'});
-	if ($slots{$slot_name}->{'endtime'} > time &&
-	    $slots{$slot_name}->{'startreserve'} < time) {
-	    # between start of reservation times and end of slot
+			       $slots{$slot_name}->{'startreserve'}." -- ".
+                               $slots{$slot_name}->{'endreserve'});
+	if (($slots{$slot_name}->{'endtime'} > time) &&
+	    ($slots{$slot_name}->{'startreserve'} < time) &&
+            ((!$slots{$slot_name}->{'endreserve'}) || 
+             ($slots{$slot_name}->{'endreserve'} > time))) {
+	    # between start of reservation time and end of reservation time
+            # and before end of slot
 	    if ($mode eq 'allslots') {
 		push(@got,$slot_name);
 	    } else {
@@ -165,8 +461,11 @@ sub check_for_reservation {
 sub get_consumed_uniqueperiods {
     my ($slots) = @_;
     my $navmap=Apache::lonnavmaps::navmap->new;
+    if (!defined($navmap)) {
+        return 'error: Unable to determine current status';
+    }
     my @problems = $navmap->retrieveResources(undef,
-					      sub { $_[0]->is_problem() },1,0);
+					      sub { $_[0]->is_problem() || $_[0]->is_tool() },1,0);
     my %used_slots;
     foreach my $problem (@problems) {
 	my $symb = $problem->symb();
@@ -213,12 +512,19 @@ sub check_for_conflict {
     if (!defined($new_slot->{'uniqueperiod'})) { return undef; }
 
     if (!ref($consumed_uniqueperiods)) {
-	$consumed_uniqueperiods = &get_consumed_uniqueperiods($slots);
-	if (&Apache::lonnet::error(%$consumed_uniqueperiods)) {
-	    return 'error: Unable to determine current status';
-	}
-    }
-    
+        if ($consumed_uniqueperiods =~ /^error: /) {
+            return $consumed_uniqueperiods;
+        } else {
+	    $consumed_uniqueperiods = &get_consumed_uniqueperiods($slots);
+            if (ref($consumed_uniqueperiods) eq 'HASH') {
+	        if (&Apache::lonnet::error(%$consumed_uniqueperiods)) {
+	            return 'error: Unable to determine current status';
+	        }
+            } else {
+                return 'error: Unable to determine current status';
+            }
+        }
+    } 
     my ($new_uniq_start,$new_uniq_end) = @{$new_slot->{'uniqueperiod'}};
     foreach my $slot_name (keys(%$consumed_uniqueperiods)) {
 	my ($start,$end)=@{$consumed_uniqueperiods->{$slot_name}};
@@ -229,19 +535,17 @@ sub check_for_conflict {
 	}
     }
     return undef;
-
 }
 
 sub make_reservation {
-    my ($slot_name,$slot,$symb)=@_;
-
-    my ($cnum,$cdom)=&get_course();
+    my ($slot_name,$slot,$symb,$cnum,$cdom)=@_;
 
     my $value=&Apache::lonnet::EXT("resource.0.availablestudent",$symb,
 				   $env{'user.domain'},$env{'user.name'});
     &Apache::lonxml::debug("value is  $value<br />");
 
-    my $use_slots = &Apache::lonnet::EXT("resource.0.useslots");
+    my $use_slots = &Apache::lonnet::EXT("resource.0.useslots",$symb,
+					 $env{'user.domain'},$env{'user.name'});
     &Apache::lonxml::debug("use_slots is  $use_slots<br />");
 
     if (&Apache::lonnet::error($value) 
@@ -308,13 +612,7 @@ sub make_reservation {
 	if ($value) {
 	    $new_value=$value.':'.$new_value;
 	}
-	my $result=&Apache::lonparmset::storeparm_by_symb($symb,
-						      '0_availablestudent',
-						       $parm_level, $new_value,
-						       'string',
-						       $env{'user.name'},
-					               $env{'user.domain'});
-	&Apache::lonxml::debug("hrrm $result");
+        &store_slot_parm($symb,$slot_name,$parm_level,$new_value,$cnum,$cdom);
 	return $wanted;
     }
 
@@ -322,6 +620,32 @@ sub make_reservation {
     return undef;
 }
 
+sub store_slot_parm {
+    my ($symb,$slot_name,$parm_level,$new_value,$cnum,$cdom) = @_;
+    my $result=&Apache::lonparmset::storeparm_by_symb($symb,
+                                                  '0_availablestudent',
+                                                   $parm_level, $new_value,
+                                                   'string',
+                                                   $env{'user.name'},
+                                                   $env{'user.domain'});
+    &Apache::lonxml::debug("hrrm $result");
+    my %storehash = (
+                       symb    => $symb,
+                       slot    => $slot_name,
+                       action  => 'reserve',
+                       context => $env{'form.context'},
+                    );
+
+    &Apache::lonnet::write_log('course','slotreservationslog',\%storehash,
+                               '',$env{'user.name'},$env{'user.domain'},
+                               $cnum,$cdom);
+    &Apache::lonnet::write_log('course',$cdom.'_'.$cnum.'_slotlog',\%storehash,
+                               1,$env{'user.name'},$env{'user.domain'},
+                               $env{'user.name'},$env{'user.domain'});
+
+    return;
+}
+
 sub remove_registration {
     my ($r) = @_;
     if ($env{'form.entry'} ne 'remove all') {
@@ -334,12 +658,12 @@ sub remove_registration {
     my %consumed=&Apache::lonnet::dump('slot_reservations',$cdom,$cnum,
 				       "^$slot_name\0");
     if (&Apache::lonnet::error(%consumed)) {
-	$r->print("<p>".&mt('A network error has occured.').'</p>');
+	$r->print("<p><span class=\"LC_error\">".&mt('A network error has occurred.').'</span></p>');
 	return;
     }
     if (!%consumed) {
-	$r->print("<p>".&mt('Slot <tt>[_1]</tt> has no reservations.',
-			    $slot_name)."</p>");
+	$r->print('<p>'.&mt('Slot [_1] has no reservations.',
+			    '<tt>'.$slot_name.'</tt>').'</p>');
 	return;
     }
 
@@ -347,7 +671,7 @@ sub remove_registration {
     my $names = join(' ',@names);
 
     my $msg = &mt('Remove all of [_1] from slot [_2]?',$names,$slot_name);
-    &remove_registration_confirmation($r,$msg,['entry','slotname']);
+    &remove_registration_confirmation($r,$msg,['entry','slotname','context']);
 }
 
 sub remove_registration_user {
@@ -364,7 +688,7 @@ sub remove_registration_user {
 		  $name,$slot_name,$title);
     
     &remove_registration_confirmation($r,$msg,['uname','udom','slotname',
-					       'entry','symb']);
+					       'entry','symb','context']);
 }
 
 sub remove_registration_confirmation {
@@ -376,8 +700,10 @@ sub remove_registration_confirmation {
 	    '<input type="hidden" name="'.$parm.'" value="'
 	    .&HTML::Entities::encode($env{'form.'.$parm},'"<>&\'').'" />'."\n";
     }
-    my %lt = &Apache::lonlocal::texthash('yes' => 'Yes',
-					 'no'  => 'No',);
+    my %lt = &Apache::lonlocal::texthash(
+        'yes' => 'Yes',
+        'no'  => 'No',
+    );
     $r->print(<<"END_CONFIRM");
 <p> $msg </p>
 <form action="/adm/slotrequest" method="post">
@@ -412,7 +738,11 @@ sub release_all_slot {
 	my ($result,$msg) =
 	    &release_reservation($slot_name,$uname,$udom,
 				 $consumed{$entry}{'symb'},$mgr);
-	$r->print("<p>$msg</p>");
+        if (!$result) {
+            $r->print('<p><span class="LC_error">'.&mt($msg).'</span></p>');
+        } else {
+	    $r->print("<p>$msg</p>");
+        }
 	$r->rflush();
     }
     $r->print('<p><a href="/adm/slotrequest?command=showslots">'.
@@ -433,12 +763,16 @@ sub release_slot {
 
     if ($mgr eq 'F' 
 	&& defined($env{'form.symb'})) {
-	$symb = $env{'form.symb'};
+	$symb = &unescape($env{'form.symb'});
     }
 
     my ($result,$msg) =
 	&release_reservation($slot_name,$uname,$udom,$symb,$mgr);
-    $r->print("<p>$msg</p>");
+    if (!$result) {
+        $r->print('<p><span class="LC_error">'.&mt($msg).'</span></p>');
+    } else {
+        $r->print("<p>$msg</p>");
+    }
     
     if ($mgr eq 'F') {
 	$r->print('<p><a href="/adm/slotrequest?command=showslots">'.
@@ -459,9 +793,31 @@ sub release_reservation {
 	    return (0,&mt('Not allowed to release Reservation: [_1], as it has already ended.',$description));
 	}
     }
-    # get parameter string, check for existance, rebuild string with the slot
-    my @slots = split(/:/,&Apache::lonnet::EXT("resource.0.availablestudent",
-					       $symb,$udom,$uname));
+
+    # if the reservation symb is for a map get a resource in that map
+    # to check slot parameters on
+    my $navmap=Apache::lonnavmaps::navmap->new;
+    if (!defined($navmap)) {
+        return (0,'error: Unable to determine current status');
+    }
+    my $passed_resource = $navmap->getBySymb($symb);
+    if (ref($passed_resource)) {
+        if ($passed_resource->is_map()) {
+	    my ($a_resource) = 
+                $navmap->retrieveResources($passed_resource, 
+                                           sub {$_[0]->is_problem() || $_[0]->is_tool() },0,1);
+            $symb = $a_resource->symb();
+        }
+    } else {
+        unless ($mgr eq 'F') {
+            return (0,'error: Unable to determine current status');
+        }
+    }
+
+    # get parameter string, check for existence, rebuild string with the slot
+    my $student = &Apache::lonnet::EXT("resource.0.availablestudent",
+                                       $symb,$udom,$uname);
+    my @slots = split(/:/,$student);
 
     my @new_slots;
     foreach my $exist_slot (@slots) {
@@ -479,10 +835,21 @@ sub release_reservation {
 	if ( $consumed{$entry}->{'name'} eq ($uname.':'.$udom) ) {
 	    &Apache::lonnet::del('slot_reservations',[$entry],
 				 $cdom,$cnum);
+            my %storehash = (
+                               symb    => $symb,
+                               slot    => $slot_name,
+                               action  => 'release',
+                               context => $env{'form.context'},
+                        );
+            &Apache::lonnet::write_log('course','slotreservationslog',
+                                       \%storehash,1,$uname,$udom,$cnum,$cdom);
+            &Apache::lonnet::write_log('course',$cdom.'_'.$cnum.'_slotlog',
+                                       \%storehash,1,$uname,$udom,$uname,$udom);
 	}
     }
 
-    my $use_slots = &Apache::lonnet::EXT("resource.0.useslots");
+    my $use_slots = &Apache::lonnet::EXT("resource.0.useslots",
+					 $symb,$udom,$uname);
     &Apache::lonxml::debug("use_slots is  $use_slots<br />");
 
     if (&Apache::lonnet::error($use_slots)) { 
@@ -498,12 +865,15 @@ sub release_reservation {
 						      '0_availablestudent',
 						      $parm_level, $new_param,
 						      'string', $uname, $udom);
-
     my $msg;
     if ($mgr eq 'F') {
 	$msg = &mt('Released Reservation for user: [_1]',"$uname:$udom");
     } else {
-	$msg = &mt('Released Reservation: [_1]',$description);
+	$msg = '<span style="font-weight: bold;">'.&mt('Released reservation: [_1]',$description).'</span><br /><br />';
+        my $person = &Apache::loncommon::plainname($env{'user.name'},$env{'user.domain'});
+        my $subject = &mt('Reservation change: [_1]',$description);
+        my $msgbody = &mt('Reservation released by [_1] for [_2].',$person,$description);
+        $msg .= &slot_change_messaging($slot{'reservationmsg'},$subject,$msgbody,'release');
     }
     return (1,$msg);
 }
@@ -525,15 +895,15 @@ sub delete_slot {
 	my $ret = &Apache::lonnet::cput('slots', {$slot_name => \%slot},
 					$cdom, $cnum);
 	if ($ret eq 'ok') {
-	    $r->print("<p>Slot <tt>$slot_name</tt> marked as deleted.</p>");
+	    $r->print('<p>'.&mt('Slot [_1] marked as deleted.','<tt>'.$slot_name.'</tt>').'</p>');
 	} else {
-	    $r->print("<p> An error ($ret) occurse when attempting to delete Slot <tt>$slot_name</tt>.</p>");
+	    $r->print('<p><span class="LC_error">'.&mt('An error occurred when attempting to delete slot: [_1]','<tt>'.$slot_name.'</tt>')." ($ret)</span></p>");
 	}
     } else {
 	if (%consumed) {
-	    $r->print("<p>Slot <tt>$slot_name</tt> has active reservations.</p>");
+	    $r->print('<p>'.&mt('Slot [_1] has active reservations.','<tt>'.$slot_name.'</tt>').'</p>');
 	} else {
-	    $r->print("<p>Slot <tt>$slot_name</tt> does not exist.</p>");
+	    $r->print('<p>'.&mt('Slot [_1] does not exist.','<tt>'.$slot_name.'</tt>').'</p>');
 	}
     }
     $r->print('<p><a href="/adm/slotrequest?command=showslots">'.
@@ -543,28 +913,40 @@ sub delete_slot {
 
 sub return_link {
     my ($r) = @_;
-    $r->print('<p><a href="/adm/flip?postdata=return:">'.
-	      &mt('Return to last resource').'</a></p>');
+    if (($env{'form.command'} eq 'manageresv') || ($env{'form.context'} eq 'usermanage')) {
+	$r->print('<p><a href="/adm/slotrequest?command=manageresv">'.
+                  &mt('Return to reservations'));  
+    } else {
+        $r->print('<p><a href="/adm/flip?postdata=return:">'.
+	          &mt('Return to last resource').'</a></p>');
+    }
 }
 
 sub get_slot {
-    my ($r,$symb)=@_;
+    my ($r,$symb,$conflictable_slot,$inhibit_return_link)=@_;
 
     my %slot=&Apache::lonnet::get_slot($env{'form.slotname'});
     my $slot_name=&check_for_conflict($symb,$env{'form.slotname'},\%slot);
 
     if ($slot_name =~ /^error: (.*)/) {
-	$r->print("<p>An error occured while attempting to make a reservation. ($1)</p>");
+	$r->print('<p><span class="LC_error">'
+                 .&mt('An error occurred while attempting to make a reservation. ([_1])',$1)
+                 .'</span></p>');
 	&return_link($r);
-	return;
+	return 0;
     }
-    if ($slot_name) {
+    if ($slot_name && $slot_name ne $conflictable_slot) {
 	my %slot=&Apache::lonnet::get_slot($slot_name);
 	my $description1=&get_description($slot_name,\%slot);
+        my $slottype1=$slot{'type'};
 	%slot=&Apache::lonnet::get_slot($env{'form.slotname'});
 	my $description2=&get_description($env{'form.slotname'},\%slot);
-	$r->print("<p>Already have a reservation: $description1</p>");
-	if ($slot_name ne $env{'form.slotname'}) {
+        if ($slottype1 eq 'preassigned') {
+            $r->print('<p>'.&mt('You already have a reservation: "[_1]", assigned by your instructor.',
+                                $description1).'</p>'.
+                      '<p>'.&mt('Your instructor must unassign it before you can make a new reservation.').
+                      '</p>');
+        } elsif ($slot_name ne $env{'form.slotname'}) {
 	    $r->print(<<STUFF);
 <form method="post" action="/adm/slotrequest">
    <input type="hidden" name="symb" value="$env{'form.symb'}" />
@@ -572,74 +954,101 @@ sub get_slot {
    <input type="hidden" name="releaseslot" value="$slot_name" />
    <input type="hidden" name="command" value="change" />
 STUFF
-            $r->print("<p>You can either ");
-	    $r->print(<<STUFF);
-   <input type="submit" name="change" value="Change" />
-STUFF
-	    $r->print(' your reservation from <b>'.$description1.'</b> to <b>'.
-		      $description2.
-		      '</b> <br />or </p>');
-	    &return_link($r);
+            $r->print('<p class="LC_error">'.&mt('Reservation currently unchanged').'</p>');
+            if ($slot_name ne '') {
+                $r->print('<p>'.&mt('To complete the transaction you [_1]must confirm[_2] you want to [_3]process the change[_4] to [_5].'
+                         ,'<b>','</b>','<i>','</i>','<b>'.$description2.'</b>')
+                         .'<br />'
+                         .&mt('Or you can choose to [_1]make no change[_2] and continue[_2] with the reservation you already had: [_3].'
+                         ,'<i>','</i>','<b>'.$description1.'</b>')
+                         .'</p><p><span class="LC_nobreak">'
+                         .'<input type="submit" name="change" value="'.&mt('Process the change').'" />' 
+                         .('&nbsp;'x3)
+                         .'<input type="submit" name="nochange" value="'.&mt('Make no change').'" />'
+                         .'</span></p>');
+            }
 	    $r->print(<<STUFF);
 </form>
 STUFF
         } else {
+            $r->print('<p>'.&mt('Already have a reservation: [_1].',$description1).'</p>');
 	    &return_link($r);
 	}
-	return;
+	return 0;
     }
 
+    my ($cnum,$cdom)=&get_course();
     my $reserved=&make_reservation($env{'form.slotname'},
-				   \%slot,$symb);
+				   \%slot,$symb,$cnum,$cdom);
     my $description=&get_description($env{'form.slotname'},\%slot);
     if (defined($reserved)) {
+	my $retvalue = 0;
 	if ($slot_name =~ /^error: (.*)/) {
-	    $r->print("<p>An error occured while attempting to make a reservation. ($1)</p>");
+	    $r->print('<p><span class="LC_error">'
+                     .&mt('An error occurred while attempting to make a reservation. ([_1])',$1)
+                     .'</span></p>');
 	} elsif ($reserved > -1) {
-	    $r->print("<p>Success: $description</p>");
+	    $r->print('<p style="font-weight: bold;">'.&mt('Successfully signed up:  [_1]',$description).'</p>');
+	    $retvalue = 1;
+            my $person = &Apache::loncommon::plainname($env{'user.name'},$env{'user.domain'});
+            my $subject = &mt('Reservation change: [_1]',$description);
+            my $msgbody = &mt('Successful reservation by [_1] for [_2].',$person,$description);
+            my $msg = &slot_change_messaging($slot{'reservationmsg'},$subject,$msgbody,'reserve');
+            if ($msg) {
+                $r->print($msg);
+            }
 	} elsif ($reserved < 0) {
-	    $r->print("<p>Already reserved: $description</p>");
+	    $r->print('<p>'.&mt('Already reserved: [_1]',$description).'</p>');
 	}
-	&return_link($r);
-	return;
+	if (!$inhibit_return_link) { &return_link($r); }
+	return 1;
     }
 
-    my %lt=('request'=>"Availibility list",
-	    'try'    =>'Try again');
-    %lt=&Apache::lonlocal::texthash(%lt);
+    my %lt = &Apache::lonlocal::texthash(
+        'request' => 'Availability list',
+        'try'     => 'Try again?',
+        'or'      => 'or',
+    );
+
+    my $extra_input;
+    if ($conflictable_slot) {
+	$extra_input='<input type="hidden" name="releaseslot" value="'.$env{'form.slotname'}.'" />';
+    }
 
+    $r->print('<p>'.&mt('[_1]Failed[_2] to reserve a slot for [_3].','<span class="LC_warning">','</span>',$description).'</p>');
     $r->print(<<STUFF);
-<p> <font color="red">Failed</font> to reserve a spot for $description. </p>
 <p>
 <form method="post" action="/adm/slotrequest">
    <input type="submit" name="Try Again" value="$lt{'try'}" />
    <input type="hidden" name="symb" value="$env{'form.symb'}" />
    <input type="hidden" name="slotname" value="$env{'form.slotname'}" />
-   <input type="hidden" name="command" value="get" />
+   <input type="hidden" name="command" value="$env{'form.command'}" />
+   $extra_input
 </form>
-?
 </p>
 <p>
-or
+$lt{'or'}
 <form method="post" action="/adm/slotrequest">
     <input type="hidden" name="symb" value="$env{'form.symb'}" />
     <input type="submit" name="requestattempt" value="$lt{'request'}" />
 </form>
-</p>
-or
 STUFF
 
-    &return_link($r);
-    return;
+    if (!$inhibit_return_link) { 
+        $r->print(&mt('or').'</p>');
+        &return_link($r);
+    } else {
+        $r->print('</p>');
+    }
+    return 0;
 }
 
 sub allowed_slot {
-    my ($slot_name,$slot,$symb,$slots,$consumed_uniqueperiods)=@_;
+    my ($slot_name,$slot,$symb,$slots,$consumed_uniqueperiods,$toskip)=@_;
 
     #already started
     if ($slot->{'starttime'} < time) {
-	# all open slot to be schedulable
-	#return 0;
+	return 0;
     }
     &Apache::lonxml::debug("$slot_name starttime good");
 
@@ -660,6 +1069,11 @@ sub allowed_slot {
     if ($slot->{'startreserve'} > time) {
 	return 0;
     }
+    # reserve time ended
+    if (($slot->{'endreserve'}) &&
+        ($slot->{'endreserve'} < time)) {
+        return 0;
+    }    
     &Apache::lonxml::debug("$slot_name reserve good");
 
     my $userallowed=0;
@@ -704,14 +1118,40 @@ sub allowed_slot {
     return 0 if (!$userallowed);
 
     # not allowed for this resource
-    if (defined($slot->{'symb'})
-	&& $slot->{'symb'} ne $symb) {
-	return 0;
+    if (defined($slot->{'symb'})) {
+        my $exclude = 1;
+        my @symbs;
+        if ($slot->{'symb'} =~ /,/) {
+            @symbs = split(/\s*,\s*/,$slot->{'symb'});
+        } else {
+            @symbs = ($slot->{'symb'});
+        }
+        my ($map,$id,$url) = &Apache::lonnet::decode_symb($symb);
+        foreach my $reqsymb (@symbs) {
+            next if ($reqsymb eq '');
+            my ($slotmap,$slotid,$sloturl) = &Apache::lonnet::decode_symb($reqsymb);
+            if ($sloturl=~/\.(page|sequence)$/) {
+                if (($map ne '') && ($map eq $sloturl)) {
+                    $exclude = 0;
+                    last;
+                }
+            } elsif ($reqsymb eq $symb) {
+                $exclude = 0;
+                last;
+            }
+        }
+        if ($exclude) {
+            unless ((ref($toskip) eq 'HASH') && ($toskip->{'symb'})) {
+	        return 0;
+            }
+        }
     }
 
     my $conflict = &check_for_conflict($symb,$slot_name,$slot,$slots,
 				       $consumed_uniqueperiods);
-    if ($conflict) {
+    if ($conflict =~ /^error: /) {
+        return 0;
+    } elsif ($conflict ne '') {
 	if ($slots->{$conflict}{'starttime'} < time) {
 	    return 0;
 	}
@@ -732,67 +1172,175 @@ sub get_description {
 }
 
 sub show_choices {
-    my ($r,$symb)=@_;
-
-    my ($cnum,$cdom)=&get_course();
-    my %slots=&Apache::lonnet::dump('slots',$cdom,$cnum);
-    my $consumed_uniqueperiods = &get_consumed_uniqueperiods(\%slots);
-    my $available;
-    $r->print('<table border="1">');
+    my ($symb,$formname,$num,$class,$slots,$consumed_uniqueperiods,$available,$got_slots)=@_;
+    my $output;
     &Apache::lonxml::debug("Checking Slots");
-    my @got_slots=&check_for_reservation($symb,'allslots');
-    foreach my $slot (sort 
-		      { return $slots{$a}->{'starttime'} <=> $slots{$b}->{'starttime'} }
-		      (keys(%slots)))  {
-
-	&Apache::lonxml::debug("Checking Slot $slot");
-	next if (!&allowed_slot($slot,$slots{$slot},undef,\%slots,
-				$consumed_uniqueperiods));
-
-	$available++;
-
-	my $description=&get_description($slot,$slots{$slot});
+    if (!ref($available) eq 'ARRAY') {
+        return;
+    }
+    if (!@{$available}) {
+        $output = '<span class="LC_info">'.&mt('No available times.').'</span>';
+        if ($env{'form.command'} ne 'manageresv') {
+            $output .= ' <a href="/adm/flip?postdata=return:">'.
+                       &mt('Return to last resource').'</a>';
+        }
+        if ($class) {
+            return '<div class="'.$class.'">'.$output.'</div>';
+        } else {
+            return $output;
+        }
+    }
+    if (@{$available} > 1) {
+        my $numavailable = scalar(@{$available});
+        my $numreserved = 0;
+        my $js;
+        my $j = 0;
+        foreach my $got (@{$got_slots}) {
+            unless (($got eq '') || (!defined($got))) {
+                $numreserved ++;
+                if ($env{'form.command'} eq 'manageresv') {
+                    $js .= "    currslot[$j]='$got';\n";
+                    $j++;
+                }
+            }
+        }
+        my $showfilter = 'none';
+        $output .= '<fieldset><legend>'.&mt('Actions').'</legend>'."\n".
+                   '<form method="post" name="reservationdisplay_'.$num.
+                   '" action="" onsubmit="toggleSlotDisplay(this.form,'."'$num'".');">';
+        my @options = ('all','filter');
+        if ($numreserved) {
+            unshift(@options,'show');
+        }
+        my %resmenu = &Apache::lonlocal::texthash (
+                                         show   => 'Show current reservation',
+                                         all    => 'Show all', 
+                                         filter => 'Search by date',
+                     );
+        foreach my $option (@options) {
+            my $onclick = "toggleSlotDisplay(this.form,'$num');";
+            if (($option eq 'show') && ($env{'form.command'} eq 'manageresv')) {  
+                $onclick .= "currSlotDisplay$num(this.form,'$num');"; 
+            }
+            $output .= '<span class="LC_nobreak"><label>'.
+                       '<input type="radio" class="LC_slotpick_radio" name="slotpick" value="'.
+                       $option.'" onclick="'.$onclick.'" />'.
+                       $resmenu{$option}.
+                       '</label></span>'.('&nbsp;' x3)."\n";
+        }
+        $output .= '</form>';
+        my $chooserform = 'reservationchooser_'.$num;
+        my $starttime = $slots->{$available->[0]}->{'starttime'};
+        my $endtime = $slots->{$available->[-1]}->{'starttime'};
+        if ($env{'form.command'} eq 'manageresv') {
+            $output .= <<"ENDSCRIPT";
+
+<script type="text/javascript">
+// <![CDATA[
+function currSlotDisplay$num() {
+    var currslot = new Array($numreserved);
+$js    
+    for (var j=0; j<$numreserved; j++) {
+        if (document.getElementById('LC_slotrow_$num\_'+currslot[j])) {
+            document.getElementById('LC_slotrow_$num\_'+currslot[j]).style.display = '';
+        }
+    }
+}
+// ]]>
+</script>
 
-	my $form=&mt('Unavailable');
-	if ((grep(/^\Q$slot\E$/,@got_slots)) ||
-	    &space_available($slot,$slots{$slot},$symb)) {
+ENDSCRIPT
+        }
+        $output .=
+            '<div id="LC_slotfilter_'.$num.'" style="display:'.$showfilter.'">'.
+            '<form method="post" name="'.$chooserform.'" action="">'.
+            '<table><tr><td>'.&mt('Open after').'</td><td>'.
+            &Apache::lonhtmlcommon::date_setter($chooserform,'start',$starttime,'','','','','','','',1,1).
+            '</td></tr><tr><td>'.&mt('Closed before').'</td><td>'.
+            &Apache::lonhtmlcommon::date_setter($chooserform,'end',$endtime,'','','','','','','',1,1).
+            '</td></tr></table><br />'.
+            '<input type="button" name="slotfilter" value="Search for reservable slots" onclick="updateSlotDisplay(this.form,'."'$num'".');" />'.
+            '</form></div><div id="LC_slotsearch_'.$num.'" style="display:none"><hr />';
+    }
+    if ($env{'form.command'} eq 'manageresv') {
+        $output .= '<table border="0">';
+    } else {
+        $output .= &Apache::loncommon::start_data_table();
+    }
+    foreach my $slot (@{$available}) {
+	my $description=&get_description($slot,$slots->{$slot});
+	my $form;
+	if ((grep(/^\Q$slot\E$/,@{$got_slots})) ||
+	    &space_available($slot,$slots->{$slot},$symb)) {
 	    my $text=&mt('Select');
 	    my $command='get';
-	    if (grep(/^\Q$slot\E$/,@got_slots)) {
-		$text=&mt('Free Reservation');
+	    if (grep(/^\Q$slot\E$/,@{$got_slots})) {
+		$text=&mt('Drop Reservation');
 		$command='release';
 	    } else {
-		my $conflict = &check_for_conflict($symb,$slot,$slots{$slot},
-						   \%slots,
-						   $consumed_uniqueperiods);
-		if ($conflict) {
-		    $text=&mt('Change Reservation');
-		    $command='get';
-		}
+		my $conflict = &check_for_conflict($symb,$slot,$slots->{$slot},
+						   $slots,$consumed_uniqueperiods);
+                if ($conflict) {
+                    if ($conflict =~ /^error: /) {
+                        $form = '<span class="LC_error">'.
+                                 &mt('Slot: [_1] has unknown status.',$description).
+                                 '</span>';
+                    } else {
+		        $text=&mt('Change Reservation');
+		        $command='get';
+		    }
+                }
 	    }
 	    my $escsymb=&escape($symb);
-	    $form=<<STUFF;
-   <form method="post" action="/adm/slotrequest">
+            if (!$form) {
+                my $name;
+                if ($formname) {
+                     $name = 'name="'.$formname.'"';
+                }
+                my $context = 'user';
+                if ($env{'form.command'} eq 'manageresv') {
+                    $context = 'usermanage';
+                }
+	        $form=<<STUFF;
+   <form method="post" action="/adm/slotrequest" $name>
      <input type="submit" name="Select" value="$text" />
      <input type="hidden" name="symb" value="$escsymb" />
      <input type="hidden" name="slotname" value="$slot" />
      <input type="hidden" name="command" value="$command" />
+     <input type="hidden" name="context" value="$context" />
    </form>
 STUFF
-	}
-	$r->print(<<STUFF);
-<tr>
+	    }
+        } else {
+            $form = &mt('Unavailable');
+        }
+        if ($env{'form.command'} eq 'manageresv') {
+            $output .= '<tr id="LC_slotrow_'.$num.'_'.$slot.'" >';
+        } else {
+	    $output .= &Apache::loncommon::start_data_table_row('','LC_slotrow_'.$num.'_'.$slot);
+        }
+        $output .= " 
  <td>$form</td>
- <td>$description</td>
-</tr>
-STUFF
+ <td>$description</td>\n";
+        if ($env{'form.command'} eq 'manageresv') {
+            $output .= '</tr>';
+        } else {
+            $output .= &Apache::loncommon::end_data_table_row();
+        }
     }
-
-    if (!$available) {
-	$r->print('<tr><td>No available times. <a href="/adm/flip?postdata=return:">'.
-		  &mt('Return to last resource').'</a></td></tr>');
+    if ($env{'form.command'} eq 'manageresv') {
+        $output .= '</table>';
+    } else {
+        $output .= &Apache::loncommon::end_data_table();
+    }
+    if (@{$available} > 1) {
+        $output .= '</div></fieldset>';
+    }
+    if ($class) {
+        return '<div class="'.$class.'">'.$output.'</div>';
+    } else {
+        return $output;
     }
-    $r->print('</table>');
 }
 
 sub to_show {
@@ -876,7 +1424,7 @@ sub remove_link {
     $symb      = &escape($symb);
 
     return <<"END_LINK";
- <a href="/adm/slotrequest?command=remove_registration&amp;slotname=$slotname&amp;entry=$entry&amp;uname=$uname&amp;udom=$udom&amp;symb=$symb"
+ <a href="/adm/slotrequest?command=remove_registration&amp;slotname=$slotname&amp;entry=$entry&amp;uname=$uname&amp;udom=$udom&amp;symb=$symb&amp;context=manage"
    >($remove)</a>
 END_LINK
 
@@ -886,22 +1434,38 @@ sub show_table {
     my ($r,$mgr)=@_;
 
     my ($cnum,$cdom)=&get_course();
+    my $crstype=&Apache::loncommon::course_type($cdom.'_'.$cnum);
     my %slots=&Apache::lonnet::dump('slots',$cdom,$cnum);
     if ( (keys(%slots))[0] =~ /^error: 2 /) {
 	undef(%slots);
     } 
     my $available;
     if ($mgr eq 'F') {
+    # FIXME: This line should be deleted once Slots uses breadcrumbs
+    $r->print('<br />'.&Apache::loncommon::help_open_topic(
+        'Slot About', &mt('Help on slots')));
+
 	$r->print('<div>');
 	$r->print('<form method="post" action="/adm/slotrequest">
 <input type="hidden" name="command" value="uploadstart" />
 <input type="submit" name="start" value="'.&mt('Upload Slot List').'" />
 </form>');
+	$r->print(&Apache::loncommon::help_open_topic('Slot CommaDelimited'));
 	$r->print('<form method="post" action="/adm/helper/newslot.helper">
 <input type="submit" name="newslot" value="'.&mt('Create a New Slot').'" />
 </form>');
+	$r->print(&Apache::loncommon::help_open_topic('Slot AddInterface'));
 	$r->print('</div>');
     }
+
+    if (!keys(%slots)) {
+        $r->print(
+            '<p class="LC_info">'
+           .&mt('No slots have been created in this '.lc($crstype).'.')
+           .'</p>'
+        );
+        return;
+    }
     
     my %Saveable_Parameters = ('show'              => 'array',
 			       'when'              => 'scalar',
@@ -926,18 +1490,26 @@ sub show_table {
 	     'starttime'       => 'Start time',
 	     'endtime'         => 'End Time',
              'startreserve'    => 'Time students can start reserving',
+             'endreserve'      => 'Time students can no longer reserve',
+             'reservationmsg'  => 'Message triggered by reservation',
 	     'secret'          => 'Secret Word',
-	     'maxspace'        => 'Maximum # of students',
+	     'space'           => '# of students/max',
 	     'ip'              => 'IP or DNS restrictions',
-	     'symb'            => 'Resource slot is restricted to.',
+	     'symb'            => 'Resource(s)/Map(s) slot is restricted to.',
 	     'allowedsections' => 'Sections slot is restricted to.',
 	     'allowedusers'    => 'Users slot is restricted to.',
 	     'uniqueperiod'    => 'Period of time slot is unique',
 	     'scheduled'       => 'Scheduled Students',
-	     'proctor'         => 'List of proctors');
+	     'proctor'         => 'List of proctors',
+	     'iptied'          => 'Unique IP each student',);
+    if ($crstype eq 'Community') {
+        $show_fields{'startreserve'} = &mt('Time members can start reserving');
+        $show_fields{'endreserve'} = &mt('Time members can no longer reserve');
+        $show_fields{'scheduled'} = &mt('Scheduled Members');
+    }
     my @show_order=('name','description','type','starttime','endtime',
-		    'startreserve','secret','maxspace','ip','symb',
-		    'allowedsections','allowedusers','uniqueperiod',
+		    'startreserve','endreserve','reservationmsg','secret','space',
+		    'ip','iptied','symb','allowedsections','allowedusers','uniqueperiod',
 		    'scheduled','proctor');
     my @show = 
 	(exists($env{'form.show'})) ? &Apache::loncommon::get_env_multiple('form.show')
@@ -1003,31 +1575,31 @@ sub show_table {
           <th>'.&mt('Slot Name Filter').'</th>
           <th>'.&mt('Options').'</th>
       </tr>
-      <tr><td>'.&Apache::loncommon::multiple_select_form('show',\@show,6,\%show_fields,\@show_order).
+      <tr><td valign="top">'.&Apache::loncommon::multiple_select_form('show',\@show,6,\%show_fields,\@show_order).
 	      '</td>
-           <td>
+           <td valign="top">
          '.&Apache::loncommon::multiple_select_form('studisplay',\@stu_display,
 						    6,\%stu_display_fields,
 						    \@stu_display_order).'
            </td>
-           <td>'.&Apache::loncommon::select_form($when,'when',%when_fields).
+           <td valign="top">'.&Apache::loncommon::select_form($when,'when',\%when_fields).
           '</td>
-           <td>'.&Apache::loncommon::select_form($name_filter_type,
+           <td valign="top">'.&Apache::loncommon::select_form($name_filter_type,
 						 'name_filter_type',
-						 %name_filter_type_fields).
+						 \%name_filter_type_fields).
 	      '<br />'.
 	      &Apache::lonhtmlcommon::textbox('name_filter_value',
 					      $env{'form.name_filter_value'},
 					      15).
           '</td>
-           <td>
+           <td valign="top">
             <table>
               <tr>
-                <td rowspan="2">Deleted slots:</td>
-                <td><label>'.$show_radio.'Show</label></td>
+                <td rowspan="2">'.&mt('Deleted slots:').'</td>
+                <td><label>'.$show_radio.&mt('Show').'</label></td>
               </tr>
               <tr>
-                <td><label>'.$hide_radio.'Hide</label></td>
+                <td><label>'.$hide_radio.&mt('Hide').'</label></td>
               </tr>
             </table>
 	  </td>
@@ -1036,24 +1608,29 @@ sub show_table {
     $r->print('</div>');
     $r->print('<p><input type="submit" name="start" value="'.&mt('Update Display').'" /></p>');
     my $linkstart='<a href="/adm/slotrequest?command=showslots&amp;order=';
-    $r->print(&Apache::loncommon::start_data_table().
-	      &Apache::loncommon::start_data_table_header_row().'
-	       <th></th>');
+    my $tableheader = &Apache::loncommon::start_data_table().
+	              &Apache::loncommon::start_data_table_header_row().'
+	              <th></th>';
     foreach my $which (@show_order) {
 	if ($which ne 'proctor' && exists($show{$which})) {
-	    $r->print('<th>'.$linkstart.$which.'">'.$show_fields{$which}.'</a></th>');
+	    $tableheader .= '<th>'.$linkstart.$which.'">'.$show_fields{$which}.'</a></th>';
 	}
     }
-    $r->print(&Apache::loncommon::end_data_table_header_row());
+    $tableheader .= &Apache::loncommon::end_data_table_header_row();
+    my $shownheader = 0;
 
     my %name_cache;
     my $slotsort = sub {
-	if ($env{'form.order'}=~/^(type|description|endtime|startreserve|maxspace|ip|symb|allowedsections|allowedusers)$/) {
+	if ($env{'form.order'}=~/^(type|description|endtime|startreserve|endreserve|ip|symb|allowedsections|allowedusers|reservationmsg)$/) {
 	    if (lc($slots{$a}->{$env{'form.order'}})
 		ne lc($slots{$b}->{$env{'form.order'}})) {
 		return (lc($slots{$a}->{$env{'form.order'}}) 
 			cmp lc($slots{$b}->{$env{'form.order'}}));
 	    }
+	} elsif ($env{'form.order'} eq 'space') {
+	    if ($slots{$a}{'maxspace'} ne $slots{$b}{'maxspace'}) {
+		return ($slots{$a}{'maxspace'} cmp $slots{$b}{'maxspace'});
+	    }
 	} elsif ($env{'form.order'} eq 'name') {
 	    if (lc($a) cmp lc($b)) {
 		return lc($a) cmp lc($b);
@@ -1073,26 +1650,38 @@ sub show_table {
 	}
 	return $slots{$a}->{'starttime'} <=> $slots{$b}->{'starttime'};
     };
+
+    my %consumed;
+    if (exists($show{'scheduled'}) || exists($show{'space'}) ) {
+	%consumed=&Apache::lonnet::dump('slot_reservations',$cdom,$cnum);
+	my ($tmp)=%consumed;
+	if ($tmp =~ /^error: /) { undef(%consumed); }
+    }
+
+    my %msgops = &slot_reservationmsg_options();
+
     foreach my $slot (sort $slotsort (keys(%slots)))  {
 	if (!&to_show($slot,$slots{$slot},$when,
 		      $env{'form.deleted'},$name_filter)) { next; }
+        my $reservemsg;
 	if (defined($slots{$slot}->{'type'})
-	    && $slots{$slot}->{'type'} ne 'schedulable_student') {
-	    #next;
+	    && $slots{$slot}->{'type'} eq 'schedulable_student') {
+	    $reservemsg = $msgops{$slots{$slot}->{'reservationmsg'}};
 	}
 	my $description=&get_description($slot,$slots{$slot});
-	my $ids;
-	if (exists($show{'scheduled'})) {
-	    my %consumed=&Apache::lonnet::dump('slot_reservations',$cdom,$cnum,
-					       "^$slot\0");
-	    my ($tmp)=%consumed;
-	    if ($tmp !~ /^error: /) {
+	my ($id_count,$ids);
+	    
+	if (exists($show{'scheduled'}) || exists($show{'space'}) ) {
+	    my $re_str = "$slot\0";
+	    my @this_slot = grep(/^\Q$re_str\E/,keys(%consumed));
+	    $id_count = scalar(@this_slot);
+	    if (exists($show{'scheduled'})) {
 		foreach my $entry (sort { $consumed{$a}{name} cmp 
 					      $consumed{$b}{name} }
-				   (keys(%consumed))) {
+				   (@this_slot)) {
 		    my (undef,$id)=split("\0",$entry);
 		    my ($uname,$udom) = split(':',$consumed{$entry}{'name'});
-		    $ids.= '<nobr>';
+		    $ids.= '<span class="LC_nobreak">';
 		    foreach my $item (@stu_display_order) {
 			if ($stu_display{$item}) {
 			    if ($item eq 'fullname') {
@@ -1103,7 +1692,7 @@ sub show_table {
 			}
 		    }
 		    $ids.=&remove_link($slot,$entry,$uname,$udom,
-				       $consumed{$entry}{'symb'}).'</nobr><br />';
+				       $consumed{$entry}{'symb'}).'</span><br />';
 		}
 	    }
 	}
@@ -1114,6 +1703,8 @@ sub show_table {
 		 &Apache::lonlocal::locallocaltime($slots{$slot}->{'endtime'}):'');
 	my $start_reserve=($slots{$slot}->{'startreserve'}?
 			   &Apache::lonlocal::locallocaltime($slots{$slot}->{'startreserve'}):'');
+        my $end_reserve=($slots{$slot}->{'endreserve'}?
+                         &Apache::lonlocal::locallocaltime($slots{$slot}->{'endreserve'}):'');
 	
 	my $unique;
 	if (ref($slots{$slot}{'uniqueperiod'})) {
@@ -1121,13 +1712,21 @@ sub show_table {
 		localtime($slots{$slot}{'uniqueperiod'}[1]);
 	}
 
-	my $title;
+	my @titles;
 	if (exists($slots{$slot}{'symb'})) {
-	    my (undef,undef,$res)=
-		&Apache::lonnet::decode_symb($slots{$slot}{'symb'});
-	    $res =   &Apache::lonnet::clutter($res);
-	    $title = &Apache::lonnet::gettitle($slots{$slot}{'symb'});
-	    $title='<a href="'.$res.'?symb='.$slots{$slot}{'symb'}.'">'.$title.'</a>';
+            my @symbs;
+            if ($slots{$slot}{'symb'} =~ /,/) {
+                @symbs = split(/\s*,\s*/,$slots{$slot}{'symb'});
+            } else {
+                @symbs = ($slots{$slot}{'symb'});
+            }
+            foreach my $reqsymb (@symbs) {
+	        my (undef,undef,$res) =
+		    &Apache::lonnet::decode_symb($reqsymb);
+	        $res = &Apache::lonnet::clutter($res);
+	        my $title = &Apache::lonnet::gettitle($reqsymb);
+	        push(@titles,'<a href="'.$res.'?symb='.$reqsymb.'">'.$title.'</a>');
+            }
 	}
 
 	my $allowedsections;
@@ -1170,26 +1769,48 @@ sub show_table {
 	}
 	my $proctors=join(', ',@proctors);
 
-	my $edit=(<<"EDITLINK");
-<a href="/adm/helper/newslot.helper?name=$slot">Edit</a>
+        my %lt = &Apache::lonlocal::texthash (
+                                               edit   => 'Edit',
+                                               delete => 'Delete',
+                                               slotlog => 'History',
+        );
+        my ($edit,$delete,$showlog,$remove_all);
+        if ($mgr) {
+	    $edit=(<<"EDITLINK");
+<a href="/adm/helper/newslot.helper?name=$slot">$lt{'edit'}</a>
 EDITLINK
 
-	my $delete=(<<"DELETELINK");
-<a href="/adm/slotrequest?command=delete&amp;slotname=$slot">Delete</a>
+	    $delete=(<<"DELETELINK");
+<a href="/adm/slotrequest?command=delete&amp;slotname=$slot">$lt{'delete'}</a>
 DELETELINK
 
-        my $remove_all=&remove_link($slot,'remove all').'<br />';
+            $remove_all=&remove_link($slot,'remove all').'<br />';
+
+            if ($ids eq '') {
+                undef($remove_all);
+            } else {
+                undef($delete);
+            }
+        }
 
-        if ($ids ne '') { undef($delete); }
-	if ($slots{$slot}{'type'} ne 'schedulable_student' 
-	    || $ids eq '') { 
+        $showlog=(<<"LOGLINK");
+<a href="/adm/slotrequest?command=slotlog&amp;slotname=$slot">$lt{'slotlog'}</a>
+LOGLINK
+
+	if ($slots{$slot}{'type'} ne 'schedulable_student') {
+            undef($showlog); 
 	    undef($remove_all);
 	}
 
+        unless ($shownheader) {
+            $r->print($tableheader);
+            $shownheader = 1;
+        }
+
 	my $row_start=&Apache::loncommon::start_data_table_row();
 	my $row_end=&Apache::loncommon::end_data_table_row();
         $r->print($row_start.
-		  "\n<td rowspan=\"$rowspan\">$edit $delete</td>\n");
+		  "\n<td rowspan=\"$rowspan\">$edit $delete $showlog</td>\n");
 	if (exists($show{'name'})) {
 	    $colspan++;$r->print("<td>$slot</td>");
 	}
@@ -1208,17 +1829,40 @@ DELETELINK
 	if (exists($show{'startreserve'})) {
 	    $colspan++;$r->print("<td>$start_reserve</td>\n");
 	}
+        if (exists($show{'endreserve'})) {
+            $colspan++;$r->print("<td>$end_reserve</td>\n");
+        }
+        if (exists($show{'reservationmsg'})) {
+            $colspan++;$r->print("<td>$reservemsg</td>\n");
+        }
 	if (exists($show{'secret'})) {
 	    $colspan++;$r->print("<td>$slots{$slot}{'secret'}</td>\n");
 	}
-	if (exists($show{'maxspace'})) {
-	    $colspan++;$r->print("<td>$slots{$slot}{'maxspace'}</td>\n");
+	if (exists($show{'space'})) {
+	    my $display = $id_count;
+	    if ($slots{$slot}{'maxspace'}>0) {
+		$display.='/'.$slots{$slot}{'maxspace'};
+		if ($slots{$slot}{'maxspace'} <= $id_count) {
+		    $display = '<strong>'.$display.' (full) </strong>';
+		}
+	    }
+	    $colspan++;$r->print("<td>$display</td>\n");
 	}
 	if (exists($show{'ip'})) {
 	    $colspan++;$r->print("<td>$slots{$slot}{'ip'}</td>\n");
 	}
+        if (exists($show{'iptied'})) {
+            $colspan++;
+            if ($slots{$slot}{'iptied'} eq 'yes') {
+                $r->print('<td>'.&mt('Yes')."</td>\n");
+            } elsif ($slots{$slot}{'iptied'} eq 'answer') {
+                $r->print('<td>'.&mt('Yes, including post-answer date')."</td>\n");
+            } else {
+                $r->print('<td>'.&mt('No')."</td>\n");
+            }
+        }
 	if (exists($show{'symb'})) {
-	    $colspan++;$r->print("<td>$title</td>\n");
+	    $colspan++;$r->print("<td>".join('<br />',@titles)."</td>\n");
 	}
 	if (exists($show{'allowedsections'})) {
 	    $colspan++;$r->print("<td>$allowedsections</td>\n");
@@ -1241,30 +1885,905 @@ $row_end
 STUFF
         }
     }
-    $r->print('</table></form>');
+    if ($shownheader) {
+        $r->print(&Apache::loncommon::end_data_table());
+    } else {
+        $r->print('<p>'.&mt('No slots meet the criteria for display').'</p>');
+    }
+    $r->print('</form>');
+    return;
+}
+
+sub manage_reservations {
+    my ($r,$crstype,$slots,$consumed_uniqueperiods,$allavailable) = @_;
+    my ($cnum,$cdom)=&get_course();
+    my $navmap = Apache::lonnavmaps::navmap->new();
+    $r->print('<p>'
+             .&mt('Instructors may use a reservation system to place restrictions on when and where assignments can be worked on.')
+             .'<br />'
+             .&mt('One example is for management of laboratory space, which is only available at certain times, and has a limited number of seats.')
+             .'</p>'
+    );
+    if (!defined($navmap)) {
+        $r->print('<div class="LC_error">');
+        if ($crstype eq 'Community') {
+            $r->print(&mt('Unable to retrieve information about community contents'));
+        } else {
+            $r->print(&mt('Unable to retrieve information about course contents'));
+        }
+        $r->print('</div>');
+        &Apache::lonnet::logthis('Manage Reservations - could not create navmap object in '.lc($crstype).':'.$env{'request.course.id'});
+        return;
+    }
+    if (ref($consumed_uniqueperiods) eq 'HASH') {
+        if (&Apache::lonnet::error(%$consumed_uniqueperiods)) {
+            $r->print('<span class="LC_error">'.
+                      &mt('An error occurred determining slot availability.').
+                      '</span>');
+            return;
+        }
+    } elsif ($consumed_uniqueperiods =~ /^error: /) {
+        $r->print('<span class="LC_error">'.
+                  &mt('An error occurred determining slot availability.').
+                  '</span>');
+        return;
+    }
+    my (%output,%slotinfo,%statusbymap,%repsymbs,%shownmaps);
+    my @possibles = $navmap->retrieveResources(undef,
+                                              sub { $_[0]->is_problem() || $_[0]->is_tool() },1,0);
+
+    foreach my $resource (@possibles) {
+        my ($useslots) = $resource->slot_control();
+        next if (($useslots eq '') || ($useslots =~ /^\s*no\s*$/i));
+        my $symb = $resource->symb();
+        my ($slot_status,$date,$slot_name) = $resource->check_for_slot('0');
+        my ($msg,$get_choices,$slotdescription);
+        my $status = $resource->simpleStatus('0');
+        my ($msg,$get_choices,$slotdescription);
+        if ($slot_name ne '') {
+            my %slot=&Apache::lonnet::get_slot($slot_name);
+            $slotdescription=&get_description($slot_name,\%slot);
+        }
+        if ($slot_status == $resource->NOT_IN_A_SLOT) {
+            $msg=&mt('No current reservation.');
+            $get_choices = 1;
+        } elsif ($slot_status == $resource->NEEDS_CHECKIN) {
+            $msg='<span class="LC_nobreak">'.&mt('Reserved:').
+                 '&nbsp;'.$slotdescription.'</span><br />'.
+                 &mt('Access requires proctor validation.');
+        } elsif ($slot_status == $resource->WAITING_FOR_GRADE) {
+            $msg=&mt('Submitted and currently in grading queue.');
+        } elsif ($slot_status == $resource->CORRECT) {
+            $msg=&mt('Problem is unavailable.');
+        } elsif ($slot_status == $resource->RESERVED) {
+            $msg='<span class="LC_nobreak">'.&mt('Reserved:').
+                 '&nbsp;'.$slotdescription.'</span><br />'.
+                 &mt('Problem is currently available.');
+        } elsif ($slot_status == $resource->RESERVED_LOCATION) {
+            $msg='<span class="LC_nobreak">'.&mt('Reserved:').
+                 '&nbsp;'.$slotdescription.'</span><br />'.
+                 &mt('Problem is available at a different location.');
+            $get_choices = 1;
+        } elsif ($slot_status == $resource->RESERVED_LATER) {
+            $msg='<span class="LC_nobreak">'.&mt('Reserved:').
+                 '&nbsp;'.$slotdescription.'</span><br />'.
+                 &mt('Problem will be available later.');
+            $get_choices = 1;
+        } elsif ($slot_status == $resource->RESERVABLE) {
+            $msg=&mt('Reservation needed');
+            $get_choices = 1;
+        } elsif ($slot_status == $resource->RESERVABLE_LATER) {
+            $msg=&mt('Reservation needed: will be reservable later.');
+        } elsif ($slot_status == $resource->NOTRESERVABLE) {
+            $msg=&mt('Reservation needed: none available.');
+        } elsif ($slot_status == $resource->UNKNOWN) {
+            $msg=&mt('Unable to determine status due to network problems.');
+        } else {
+            if ($status != $resource->OPEN) {
+                $msg = &Apache::lonnavmaps::getDescription($resource,'0');
+            }
+        }
+        $output{$symb}{'msg'} = $msg;
+        if (($status == $resource->OPEN) && ($get_choices)) {
+            $output{$symb}{'hasaction'} = 1;
+        }
+        my ($mapurl,$id,$resurl) = &Apache::lonnet::decode_symb($symb);
+        $mapurl = &Apache::lonnet::clutter($mapurl);
+        unless ($mapurl =~ /default\.sequence$/) {
+            $shownmaps{$mapurl} = 1;
+            my $map = $navmap->getResourceByUrl($mapurl);
+            if (ref($map)) {
+                my @pcs = split(/,/,$map->map_hierarchy());
+                shift(@pcs);
+                shift(@pcs);
+                if (@pcs) {
+                    map { $shownmaps{$navmap->getByMapPc($_)->src()} = 1; } reverse(@pcs);
+                }
+            }
+        }
+        if (($useslots eq 'map_map') || ($useslots eq 'map')) {
+            if ($slot_status ne '') {
+                if (ref($statusbymap{$mapurl}{$slot_status}) eq 'ARRAY') {
+                    push(@{$statusbymap{$mapurl}{$slot_status}},$symb);
+                } else {
+                    $statusbymap{$mapurl}{$slot_status} = [$symb];
+                }
+            }
+        }
+    }
+
+    foreach my $mapurl (keys(%statusbymap)) {
+        if (ref($statusbymap{$mapurl}) eq 'HASH') {
+            if (keys(%{$statusbymap{$mapurl}}) == 1) {
+                my @values = values(%{$statusbymap{$mapurl}});
+                my $repsymb = $values[0][0];
+                if (ref($output{$repsymb}) eq 'HASH') {
+                    $output{$mapurl}{'msg'} = $output{$repsymb}{'msg'};
+                    $output{$mapurl}{'hasaction'} = $output{$repsymb}{'hasaction'};
+                }
+                $repsymbs{$mapurl} = $repsymb;
+            }
+        }
+    }
+
+    my (%parent,%container,%container_title);
+    my ($depth,$count,$reservable,$currcontainer,$rownum,$mapnum,$shown) = (0,0,0,0,0,0,0);
+    my @backgrounds = ("LC_even_row","LC_odd_row");
+    my $numcolors = scalar(@backgrounds);
+    my $location=&Apache::loncommon::lonhttpdurl("/adm/lonIcons/whitespace_21.gif");
+    my $slotheader = '<p>'.
+                 &mt('Your reservation status for any such assignments is listed below:').
+                 '</p>'.
+                 '<table class="LC_data_table LC_tableOfContent" id="LC_slot_reservations">'."\n";
+    my $shownheader = 0;
+    my $currmap;
+    my $it=$navmap->getIterator(undef,undef,undef,1,undef,undef);
+    while (my $resource = $it->next()) {
+        if ($resource == $it->BEGIN_MAP()) {
+            $depth++;
+            $parent{$depth} = $currcontainer;
+            if (ref($container{$currcontainer})) {
+                my $currmapres = $container{$currcontainer};
+                my $currmaptitle = $container_title{$currcontainer};
+                $currmap = $currmapres->src();
+                my $currmaptype = 'sequence';
+                if ($currmapres->is_page()) {
+                    $currmaptype = 'page';
+                }
+                if ($shownmaps{$currmap}) {
+                    $mapnum ++;
+                    $rownum ++;
+                    $shown ++;
+                    if (!$shownheader) {
+                        $r->print($slotheader);
+                        $shownheader = 1;
+                    }
+                    my $bgcolor = $backgrounds[$shown % $numcolors];
+                    my ($spacers,$icon);
+                    my $row = '<tr class="'.$bgcolor.'" id="LC_slotmaprow_'.$rownum.'">';
+                    if (ref($statusbymap{$currmap}) eq 'HASH') {
+                        my ($spacers,$icon) = &show_map_row($depth-1,$location,$currmaptype,$currmaptitle);
+                        my $arrowstate = 'open';
+                        if (keys(%{$statusbymap{$currmap}}) == 1) {
+                            $arrowstate = 'closed';
+                        }
+                        $row .= '<td>'.$spacers.'<img src="/adm/lonIcons/arrow.'.$arrowstate.'.gif" '.
+                                'id="arrow'.$mapnum.'" '.'alt="arrow" onmouseover="this.style.cursor=\'pointer\'" '.
+                                'onclick="'."toggleSlotMap('$mapnum','$rownum');".'" />'.
+                                $icon.('&nbsp;' x6).'</td>'."\n";
+                        if (ref($output{$currmap}) eq 'HASH') {
+                            my $formnum = $mapnum.'_'.$reservable+1;
+                            my $class = 'LC_slotmaptext_'.$mapnum;
+                            if ($output{$currmap}{'hasaction'}) {
+                                $row .= '<td valign="top"><span class="'.$class.'">'.
+                                          $output{$currmap}{'msg'}.
+                                          '</span></td><td valign="top">'.
+                                          &slot_chooser($repsymbs{$currmap},$class,$formnum,
+                                                        $allavailable,$slots,$consumed_uniqueperiods).
+                                          '</td>';
+                            } else {
+                                $row .= '<td colspan="2" valign="middle"><span class="'.$class.'">'.
+                                          $output{$currmap}{'msg'}.
+                                          '</span></td>';
+                            }
+                            $row .= '</tr>'."\n";
+                        } else {
+                            $row .= '<td colspan="2">&nbsp;</td></tr>'."\n";
+                        }
+                    } else {
+                        my ($spacers,$icon) = &show_map_row($depth,$location,$currmaptype,$currmaptitle);
+                        $row .= '<td>'.$spacers.$icon.('&nbsp;' x6).'</td><td colspan="2">&nbsp;</td></tr>'."\n";
+                    }
+                    $r->print($row);
+                }
+            }
+        } elsif ($resource == $it->END_MAP()) {
+            $depth--;
+            $currcontainer = $parent{$depth};
+        } elsif (ref($resource)) {
+            my $symb = $resource->symb();
+            next if (!$resource->is_problem() && !$resource->is_tool() &&
+                     !$resource->is_sequence() && !$resource->is_page());
+            $count ++;
+            if (($resource->is_sequence()) || ($resource->is_page())) {
+                $currcontainer = $count;
+                $container{$currcontainer} = $resource;
+                $container_title{$currcontainer} = $resource->compTitle();
+            }
+            if (($resource->is_problem() || $resource->is_tool)) {
+                next unless (exists($output{$symb}));
+                $reservable ++;
+                $rownum ++;
+                if (!$shownheader) {
+                    $r->print($slotheader);
+                    $shownheader = 1;
+                }
+                my $style;
+                if (exists($output{$currmap})) {
+                    $style = 'none';
+                } else {
+                    $style = 'table-row';
+                    $shown ++;
+                }
+                my $title = $resource->compTitle();
+                my $bgcolor = $backgrounds[$shown % $numcolors];
+                $r->print('<tr class="'.$bgcolor.' LC_slotresrow_'.$mapnum.'"'.
+                          ' style="display:'.$style.'" id="LC_slotresrow_'.$rownum.'">'.
+                          '<td>');
+                for (my $i=0; $i<$depth; $i++) {
+                    $r->print('<img src="'.$location.'" alt="" />');
+                }
+                $r->print('<a href="'.$resource->src().'?symb='.$symb.'">'.
+                          '<img class="LC_contentImage" src="/adm/lonIcons/');
+                if ($resource->is_task()) {
+                    $r->print('task.gif" alt="'.&mt('Task'));
+                } elsif ($resource->is_tool()) {
+                    $r->print('unknown.gif" alt="'.&mt('External Tool'));
+                } else {
+                    $r->print('problem.gif" alt="'.&mt('Problem'));
+                }
+                $r->print('" /><b>'.$title.'</b></a>'.('&nbsp;' x6).'</td>');
+                my $class = 'LC_slottext_'.$mapnum;
+                if ($output{$symb}{'hasaction'}) {
+                    $r->print('<td valign="top"><span class="'.$class.'">'.$output{$symb}{'msg'}.'</span></td>'.
+                              '<td valign="top">'.
+                              &slot_chooser($symb,$class,$reservable,$allavailable,$slots,
+                                            $consumed_uniqueperiods).'</td>');
+                } else {
+                    $r->print('<td colspan="2" valign="middle">'.
+                              '<span class="'.$class.'">'.$output{$symb}{'msg'}.'</span>'.
+                              '</td>');
+                }
+                $r->print('</tr>'."\n");
+            }
+        }
+    }
+    if ($shownheader) {
+        $r->print('</table>');
+    }
+    if (!$reservable) {
+        $r->print('<span class="LC_info">');
+        if ($crstype eq 'Community') {
+            $r->print(&mt('No community items currently require a reservation to gain access.'));
+        } else {
+            $r->print(&mt('No course items currently require a reservation to gain access.'));
+        }
+        $r->print('</span>');
+    }
+    $r->print('<p><a href="/adm/slotrequest?command=showresv">'.
+              &mt('Reservation History').'</a></p>');
+}
+
+sub show_map_row {
+    my ($depth,$location,$type,$title) = @_;
+    my $spacers;
+    for (my $i=0; $i<$depth-1; $i++) {
+        $spacers .= '<img src="'.$location.'" alt="" />';
+    }
+    my $icon;
+    if ($type eq 'page') {
+        $icon = '<img src="/adm/lonIcons/navmap.page.open.gif" alt="" />&nbsp;'."\n";
+    } else {
+        $icon = '<img src="/adm/lonIcons/navmap.folder.open.gif" alt="" />&nbsp;'."\n";
+    }
+    $icon .= $title;
+    return ($spacers,$icon);
+}
+
+sub slot_chooser {
+    my ($symb,$class,$formnum,$allavailable,$slots,$consumed_uniqueperiods) = @_;
+    my $output;
+    my @got_slots=&check_for_reservation($symb,'allslots');
+    if ($got_slots[0] =~ /^error: /) {
+        $output = '<span class="'.$class.'"><span class="LC_error">'.
+                  &mt('An error occurred determining slot availability.').
+                  '</span></span>';
+    } else {
+        my $formname = 'manageres_'.$formnum;
+        if (ref($allavailable) eq 'ARRAY') {
+            my @available;
+            if (ref($slots) eq 'HASH') {
+                foreach my $slot (@{$allavailable}) {
+                    # not allowed for this resource
+                    if (ref($slots->{$slot}) eq 'HASH') {
+                        if ($slots->{$slot}->{'symb'} ne '') {
+                            my ($map,$id,$url) = &Apache::lonnet::decode_symb($symb);
+                            my $exclude = 1;
+                            my @reqsymbs = split(/\s*,\s*/,$slots->{$slot}->{'symb'});
+                            if (@reqsymbs) {
+                                if (grep(/^\Q$symb\E$/,@reqsymbs)) {
+                                    $exclude = 0;
+                                } else {
+                                    foreach my $reqsymb (@reqsymbs) {
+                                        my (undef,undef,$sloturl) = &Apache::lonnet::decode_symb($reqsymb);
+                                        if ($sloturl=~/\.(page|sequence)$/) {
+                                            if (($map ne '') && ($map eq $sloturl)) {
+                                                $exclude = 0;
+                                                last;
+                                            }
+                                        }
+                                    }
+                                }
+                                next if ($exclude);   
+                            }
+                        }
+                    }
+                    push(@available,$slot);
+                }
+            }
+            $output .= &show_choices($symb,$formname,$formnum,$class,
+                                     $slots,$consumed_uniqueperiods,
+                                     \@available,\@got_slots);
+        }
+    }
+    return $output;
+}
+
+sub show_reservations {
+    my ($r,$uname,$udom) = @_;
+    if (!defined($uname)) {
+        $uname = $env{'user.name'};
+    }
+    if (!defined($udom)) {
+        $udom = $env{'user.domain'};
+    }
+    my $formname = 'slotlog';
+    my ($cnum,$cdom)=&get_course();
+    my $crstype = &Apache::loncommon::course_type();
+    my %log=&Apache::lonnet::dump('nohist_'.$cdom.'_'.$cnum.'_slotlog',$udom,$uname);
+    if ($env{'form.origin'} eq 'aboutme') {
+        $r->print('<div class="LC_fontsize_large">');
+        my $name = &Apache::loncommon::plainname($env{'form.uname'},$env{'form.udom'},
+                                                    'firstname');
+        if ($crstype eq 'Community') {
+            $r->print(&mt('History of member-reservable slots for: [_1]',
+                          $name));
+        } else {
+            $r->print(&mt('History of student-reservable slots for: [_1]',
+                          $name));
+
+        }
+        $r->print('</div>');
+    }
+    $r->print('<form action="/adm/slotrequest" method="post" name="'.$formname.'">');
+    # set defaults
+    my $now = time();
+    my $defstart = $now - (7*24*3600); #7 days ago
+    my %defaults = (
+                     page           => '1',
+                     show           => '10',
+                     action         => 'any',
+                     log_start_date => $defstart,
+                     log_end_date   => $now,
+                   );
+    my $more_records = 0;
+
+    # set current
+    my %curr;
+    foreach my $item ('show','page','action') {
+        $curr{$item} = $env{'form.'.$item};
+    }
+    my ($startdate,$enddate) =
+        &Apache::lonuserutils::get_dates_from_form('log_start_date',
+                                                   'log_end_date');
+    $curr{'log_start_date'} = $startdate;
+    $curr{'log_end_date'} = $enddate;
+    foreach my $key (keys(%defaults)) {
+        if ($curr{$key} eq '') {
+            $curr{$key} = $defaults{$key};
+        }
+    }
+    my ($version) = ($r->dir_config('lonVersion') =~ /^([\d\.]+)\-/);
+    $r->print(&display_filter($formname,$cdom,$cnum,\%curr,$version));
+    my $showntablehdr = 0;
+    my $tablehdr = &Apache::loncommon::start_data_table().
+                   &Apache::loncommon::start_data_table_header_row().
+                   '<th>&nbsp;</th><th>'.&mt('When').'</th><th>'.&mt('Action').'</th>'.
+                   '<th>'.&mt('Description').'</th><th>'.&mt('Start time').'</th>'.
+                   '<th>'.&mt('End time').'</th><th>'.&mt('Resource').'</th>'.
+                   &Apache::loncommon::end_data_table_header_row();
+    my ($minshown,$maxshown);
+    $minshown = 1;
+    my $count = 0;
+    if ($curr{'show'} ne &mt('all')) {
+        $maxshown = $curr{'page'} * $curr{'show'};
+        if ($curr{'page'} > 1) {
+            $minshown = 1 + ($curr{'page'} - 1) * $curr{'show'};
+        }
+    }
+    my (%titles,%maptitles);
+    my %lt = &reservationlog_contexts($crstype);
+    foreach my $id (sort { $log{$b}{'exe_time'}<=>$log{$a}{'exe_time'} } (keys(%log))) {
+        next if (($log{$id}{'exe_time'} < $curr{'log_start_date'}) ||
+                 ($log{$id}{'exe_time'} > $curr{'log_end_date'}));
+        if ($curr{'show'} ne &mt('all')) {
+            if ($count >= $curr{'page'} * $curr{'show'}) {
+                $more_records = 1;
+                last;
+            }
+        }
+        if ($curr{'action'} ne 'any') {
+            next if ($log{$id}{'logentry'}{'action'} ne $curr{'action'});
+        }
+        $count ++;
+        next if ($count < $minshown);
+        if (!$showntablehdr) {
+            $r->print($tablehdr);
+            $showntablehdr = 1;
+        }
+        my $symb = $log{$id}{'logentry'}{'symb'};
+        my $slot_name = $log{$id}{'logentry'}{'slot'};
+        my %slot=&Apache::lonnet::get_slot($slot_name);
+        my $description = $slot{'description'};
+        my $start = ($slot{'starttime'}?
+                     &Apache::lonlocal::locallocaltime($slot{'starttime'}):'');
+        my $end = ($slot{'endtime'}?
+                   &Apache::lonlocal::locallocaltime($slot{'endtime'}):'');
+        my $title = &get_resource_title($symb,\%titles,\%maptitles);
+        my $chgaction = $log{$id}{'logentry'}{'action'};
+        if ($chgaction ne '' && $lt{$chgaction} ne '') {
+            $chgaction = $lt{$chgaction};
+        }
+        $r->print(&Apache::loncommon::start_data_table_row().'<td>'.$count.'</td><td>'.&Apache::lonlocal::locallocaltime($log{$id}{'exe_time'}).'</td><td>'.$chgaction.'</td><td>'.$description.'</td><td>'.$start.'</td><td>'.$end.'</td><td>'.$title.'</td>'.&Apache::loncommon::end_data_table_row()."\n");
+    }
+    if ($showntablehdr) {
+        $r->print(&Apache::loncommon::end_data_table().'<br />');
+        if (($curr{'page'} > 1) || ($more_records)) {
+            $r->print('<p>');
+            if ($curr{'page'} > 1) {
+                $r->print('<input type="button" onclick="javascript:chgPage('."'previous'".');" value="'.
+                          &mt('Previous [_1] changes',$curr{'show'}).'" />');
+            }
+            if ($more_records) {
+                $r->print('<input type="button" onclick="javascript:chgPage('."'next'".');" value="'.
+                          &mt('Next [_1] changes',$curr{'show'}).'" />');
+            }
+            $r->print('</p>');
+            $r->print(<<"ENDSCRIPT");
+<script type="text/javascript">
+// <![CDATA[
+function chgPage(caller) {
+    if (caller == 'previous') {
+        document.$formname.page.value --;
+    }
+    if (caller == 'next') {
+        document.$formname.page.value ++;
+    }
+    document.$formname.submit();
+    return;
+}
+// ]]>
+</script>
+ENDSCRIPT
+        }
+    } else {
+        $r->print('<span class="LC_info">'
+                 .&mt('There are no transactions to display.')
+                 .'</span>'
+        );
+    }
+    $r->print('<input type="hidden" name="page" value="'.$curr{'page'}.'" />'."\n".
+              '<input type="hidden" name="command" value="showresv" />'."\n");
+    if ($env{'form.origin'} eq 'aboutme') {
+        $r->print('<input type="hidden" name="origin" value="'.$env{'form.origin'}.'" />'."\n".
+                  '<input type="hidden" name="uname" value="'.$env{'form.uname'}.'" />'."\n".
+                  '<input type="hidden" name="udom" value="'.$env{'form.udom'}.'" />'."\n");
+    }
+    $r->print('</form>');
+    return;
+}
+
+sub show_reservations_log {
+    my ($r) = @_;
+    my $badslot;
+    my $crstype = &Apache::loncommon::course_type();
+    if ($env{'form.slotname'} eq '') {
+        $r->print('<div class="LC_warning">'.&mt('No slot name provided').'</div>');
+        $badslot = 1;
+    } else {
+        my %slot=&Apache::lonnet::get_slot($env{'form.slotname'});
+        if (keys(%slot) == 0) {
+            $r->print('<div class="LC_warning">'.&mt('Invalid slot name: [_1]',$env{'form.slotname'}).'</div>');
+            $badslot = 1;
+        } elsif ($slot{type} ne 'schedulable_student') {
+            my $description = &get_description($env{'form.slotname'},\%slot);
+            $r->print('<div class="LC_warning">');
+            if ($crstype eq 'Community') {
+                $r->print(&mt('Reservation history unavailable for non-member-reservable slot: [_1].',$description));
+            } else {
+                $r->print(&mt('Reservation history unavailable for non-student-reservable slot: [_1].',$description));
+            }
+            $r->print('</div>');
+            $badslot = 1;
+        }
+    }
+    if ($badslot) {
+        $r->print('<p><a href="/adm/slotrequest?command=showslots">'.
+                  &mt('Return to slot list').'</a></p>');
+        return;
+    }
+    my $formname = 'reservationslog';
+    my ($cnum,$cdom)=&get_course();
+    my %slotlog=&Apache::lonnet::dump('nohist_slotreservationslog',$cdom,$cnum);
+    if ((keys(%slotlog))[0]=~/^error\:/) { undef(%slotlog); }
+
+    my (%log,@allsymbs);
+    if (keys(%slotlog)) {
+        foreach my $key (keys(%slotlog)) {
+            if (ref($slotlog{$key}) eq 'HASH') {
+                if (ref($slotlog{$key}{'logentry'}) eq 'HASH') {
+                    if ($slotlog{$key}{'logentry'}{'slot'} eq $env{'form.slotname'}) {
+                        $log{$key} = $slotlog{$key};
+                        if ($slotlog{$key}{'logentry'}{'symb'} ne '') {
+                            push(@allsymbs,$slotlog{$key}{'logentry'}{'symb'});
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    $r->print('<form action="/adm/slotrequest" method="post" name="'.$formname.'">');
+    my %saveable_parameters = ('show' => 'scalar',);
+    &Apache::loncommon::store_course_settings('reservationslog',
+                                              \%saveable_parameters);
+    &Apache::loncommon::restore_course_settings('reservationslog',
+                                                \%saveable_parameters);
+    # set defaults
+    my $now = time();
+    my $defstart = $now - (7*24*3600); #7 days ago
+    my %defaults = (
+                     page           => '1',
+                     show           => '10',
+                     chgcontext     => 'any',
+                     action         => 'any',
+                     symb           => 'any',
+                     log_start_date => $defstart,
+                     log_end_date   => $now,
+                   );
+    my $more_records = 0;
+
+    # set current
+    my %curr;
+    foreach my $item ('show','page','chgcontext','action','symb') {
+        $curr{$item} = $env{'form.'.$item};
+    }
+    my ($startdate,$enddate) =
+        &Apache::lonuserutils::get_dates_from_form('log_start_date',
+                                                   'log_end_date');
+    $curr{'log_start_date'} = $startdate;
+    $curr{'log_end_date'} = $enddate;
+    foreach my $key (keys(%defaults)) {
+        if ($curr{$key} eq '') {
+            $curr{$key} = $defaults{$key};
+        }
+    }
+    my (%whodunit,%changed,$version);
+    ($version) = ($r->dir_config('lonVersion') =~ /^([\d\.]+)\-/);
+
+    my %slot=&Apache::lonnet::get_slot($env{'form.slotname'});
+    my $description = $slot{'description'};
+    $r->print('<span class="LC_fontsize_large">');
+    if ($crstype eq 'Community') {
+        $r->print(&mt('Reservation changes for member-reservable slot: [_1]',$description));
+    } else {
+        $r->print(&mt('Reservation changes for student-reservable slot: [_1]',$description));
+    }
+    $r->print('</span><br />');
+    $r->print(&display_filter($formname,$cdom,$cnum,\%curr,$version,\@allsymbs));
+    my $showntablehdr = 0;
+    my $tablehdr = &Apache::loncommon::start_data_table().
+                   &Apache::loncommon::start_data_table_header_row().
+                   '<th>&nbsp;</th><th>'.&mt('When').'</th><th>'.&mt('Who made the change').
+                   '</th><th>'.&mt('Affected User').'</th><th>'.&mt('Action').'</th>'.
+                   '<th>'.&mt('Resource').'</th><th>'.&mt('Context').'</th>'.
+                   &Apache::loncommon::end_data_table_header_row();
+    my ($minshown,$maxshown);
+    $minshown = 1;
+    my $count = 0;
+    if ($curr{'show'} ne &mt('all')) {
+        $maxshown = $curr{'page'} * $curr{'show'};
+        if ($curr{'page'} > 1) {
+            $minshown = 1 + ($curr{'page'} - 1) * $curr{'show'};
+        }
+    }
+    my %lt = &reservationlog_contexts($crstype);
+    my (%titles,%maptitles);
+    foreach my $id (sort { $log{$b}{'exe_time'}<=>$log{$a}{'exe_time'} } (keys(%log))) {
+        next if (($log{$id}{'exe_time'} < $curr{'log_start_date'}) ||
+                 ($log{$id}{'exe_time'} > $curr{'log_end_date'}));
+        if ($curr{'show'} ne &mt('all')) {
+            if ($count >= $curr{'page'} * $curr{'show'}) {
+                $more_records = 1;
+                last;
+            }
+        }
+        if ($curr{'chgcontext'} ne 'any') {
+            if ($curr{'chgcontext'} eq 'user') {
+                next if (($log{$id}{'logentry'}{'context'} ne 'user') && 
+                         ($log{$id}{'logentry'}{'context'} ne 'usermanage'));
+            } else {
+                next if ($log{$id}{'logentry'}{'context'} ne $curr{'chgcontext'});
+            }
+        }
+        if ($curr{'action'} ne 'any') {
+            next if ($log{$id}{'logentry'}{'action'} ne $curr{'action'});
+        }
+        if ($curr{'symb'} ne 'any') {
+            next if ($log{$id}{'logentry'}{'symb'} ne $curr{'symb'});
+        }
+        $count ++;
+        next if ($count < $minshown);
+        if (!$showntablehdr) {
+            $r->print($tablehdr);
+            $showntablehdr = 1;
+        }
+        if ($whodunit{$log{$id}{'exe_uname'}.':'.$log{$id}{'exe_udom'}} eq '') {
+            $whodunit{$log{$id}{'exe_uname'}.':'.$log{$id}{'exe_udom'}} =
+                &Apache::loncommon::plainname($log{$id}{'exe_uname'},$log{$id}{'exe_udom'});
+        }
+        if ($changed{$log{$id}{'uname'}.':'.$log{$id}{'udom'}} eq '') {
+            $changed{$log{$id}{'uname'}.':'.$log{$id}{'udom'}} =
+                &Apache::loncommon::plainname($log{$id}{'uname'},$log{$id}{'udom'});
+        }
+        my $symb = $log{$id}{'logentry'}{'symb'};
+        my $title = &get_resource_title($symb,\%titles,\%maptitles); 
+        my $chgcontext = $log{$id}{'logentry'}{'context'};
+        if ($chgcontext ne '' && $lt{$chgcontext} ne '') {
+            $chgcontext = $lt{$chgcontext};
+        }
+        my $chgaction = $log{$id}{'logentry'}{'action'};
+        if ($chgaction ne '' && $lt{$chgaction} ne '') {
+            $chgaction = $lt{$chgaction}; 
+        }
+        $r->print(&Apache::loncommon::start_data_table_row().'<td>'.$count.'</td><td>'.&Apache::lonlocal::locallocaltime($log{$id}{'exe_time'}).'</td><td>'.$whodunit{$log{$id}{'exe_uname'}.':'.$log{$id}{'exe_udom'}}.'</td><td>'.$changed{$log{$id}{'uname'}.':'.$log{$id}{'udom'}}.'</td><td>'.$chgaction.'</td><td>'.$title.'</td><td>'.$chgcontext.'</td>'.&Apache::loncommon::end_data_table_row()."\n");
+    }
+    if ($showntablehdr) {
+        $r->print(&Apache::loncommon::end_data_table().'<br />');
+        if (($curr{'page'} > 1) || ($more_records)) {
+            $r->print('<p>');
+            if ($curr{'page'} > 1) {
+                $r->print('<input type="button" onclick="javascript:chgPage('."'previous'".');" value="'.
+                          &mt('Previous [_1] changes',$curr{'show'}).'" />');
+            }
+            if ($more_records) {
+                $r->print('<input type="button" onclick="javascript:chgPage('."'next'".');" value="'.
+                          &mt('Next [_1] changes',$curr{'show'}).'" />');
+            }
+            $r->print('</p>');
+            $r->print(<<"ENDSCRIPT");
+<script type="text/javascript">
+function chgPage(caller) {
+    if (caller == 'previous') {
+        document.$formname.page.value --;
+    }
+    if (caller == 'next') {
+        document.$formname.page.value ++;
+    }
+    document.$formname.submit();
+    return;
+}
+</script>
+ENDSCRIPT
+        }
+    } else {
+        $r->print(&mt('There are no records to display.'));
+    }
+    $r->print('<input type="hidden" name="page" value="'.$curr{'page'}.'" />'.
+              '<input type="hidden" name="slotname" value="'.$env{'form.slotname'}.'" />'.
+              '<input type="hidden" name="command" value="slotlog" /></form>'.
+              '<p><a href="/adm/slotrequest?command=showslots">'.
+              &mt('Return to slot list').'</a></p>');
+    return;
+}
+
+sub get_resource_title {
+    my ($symb,$titles,$maptitles) = @_;
+    my $title;
+    if ((ref($titles) eq 'HASH') && (ref($maptitles) eq 'HASH')) { 
+        if (defined($titles->{$symb})) {
+            $title = $titles->{$symb};
+        } else {
+            $title = &Apache::lonnet::gettitle($symb);
+            my $maptitle;
+            my ($mapurl) = &Apache::lonnet::decode_symb($symb);
+            if (defined($maptitles->{$mapurl})) {
+                $maptitle = $maptitles->{$mapurl};
+            } else {
+                if ($mapurl eq $env{'course.'.$env{'request.course.id'}.'.url'}) {
+                    $maptitle=&mt('Main Content');
+                } else {
+                    $maptitle=&Apache::lonnet::gettitle($mapurl);
+                }
+                $maptitles->{$mapurl} = $maptitle;
+            }
+            if ($maptitle ne '') {
+                $title .= ' '.&mt('(in [_1])',$maptitle);
+            }
+            $titles->{$symb} = $title;
+        }
+    } else {
+        $title = $symb;
+    }
+    return $title;
+}
+
+sub reservationlog_contexts {
+    my ($crstype) = @_;
+    my %lt = &Apache::lonlocal::texthash (
+                                             any        => 'Any',
+                                             user       => 'By student',
+                                             manage     => 'Via Slot Manager',
+                                             parameter  => 'Via Parameter Manager',
+                                             reserve    => 'Made reservation',
+                                             release    => 'Dropped reservation',
+                                             usermanage => 'By student', 
+                                         );
+    if ($crstype eq 'Community') {
+        $lt{'user'} = &mt('By member');
+        $lt{'usermanage'} = $lt{'user'};
+    }
+    return %lt;
+}
+
+sub display_filter {
+    my ($formname,$cdom,$cnum,$curr,$version,$allsymbs) = @_;
+    my $nolink = 1;
+    my (%titles,%maptitles);
+    my $output = '<br /><table><tr><td valign="top">'.
+                 '<span class="LC_nobreak"><b>'.&mt('Changes/page:').'</b><br />'.
+                 &Apache::lonmeta::selectbox('show',$curr->{'show'},undef,
+                                              (&mt('all'),5,10,20,50,100,1000,10000)).
+                 '</td><td>&nbsp;&nbsp;</td>';
+    my $startform =
+        &Apache::lonhtmlcommon::date_setter($formname,'log_start_date',
+                                            $curr->{'log_start_date'},undef,
+                                            undef,undef,undef,undef,undef,undef,$nolink);
+    my $endform =
+        &Apache::lonhtmlcommon::date_setter($formname,'log_end_date',
+                                            $curr->{'log_end_date'},undef,
+                                            undef,undef,undef,undef,undef,undef,$nolink);
+    my $crstype = &Apache::loncommon::course_type();
+    my %lt = &reservationlog_contexts($crstype);
+    $output .= '<td valign="top"><b>'.&mt('Window during which changes occurred:').
+               '</b><br /><table><tr><td>'.&mt('After:').
+               '</td><td>'.$startform.'</td></tr><tr><td>'.&mt('Before:').'</td><td>'.
+               $endform.'</td></tr></table></td><td>&nbsp;&nbsp;</td>';
+    if (ref($allsymbs) eq 'ARRAY') {
+        $output .= '<td valign="top"><b>'.&mt('Resource').'</b><br />'.
+                   '<select name="resource"><option value="any"';
+        if ($curr->{'resource'} eq 'any') {
+            $output .= ' selected="selected"';
+        }
+        $output .=  '>'.&mt('Any').'</option>'."\n";
+        foreach my $symb (@{$allsymbs}) {
+            my $title = &get_resource_title($symb,\%titles,\%maptitles);
+            my $selstr = '';
+            if ($curr->{'resource'} eq $symb) {
+                $selstr = ' selected="selected"';
+            }
+            $output .= '  <option value="'.$symb.'"'.$selstr.'>'.$title.'</option>';
+        }
+        $output .= '</select></td><td>&nbsp;&nbsp;</td><td valign="top"><b>'.
+                   &mt('Context:').'</b><br /><select name="chgcontext">';
+        foreach my $chgtype ('any','user','manage','parameter') {
+            my $selstr = '';
+            if ($curr->{'chgcontext'} eq $chgtype) {
+                $output .= $selstr = ' selected="selected"';
+            }
+            $output .= '<option value="'.$chgtype.'"'.$selstr.'>'.$lt{$chgtype}.'</option>'."\n";
+        }
+        $output .= '</select></td>';
+    } else {
+        $output .= '<td valign="top"><b>'.&mt('Action').'</b><br />'.
+                   '<select name="action"><option value="any"';
+        if ($curr->{'action'} eq 'any') {
+            $output .= ' selected="selected"';
+        }
+        $output .=  '>'.&mt('Any').'</option>'."\n";
+        foreach my $actiontype ('reserve','release') {
+            my $selstr = '';
+            if ($curr->{'action'} eq $actiontype) {
+                $output .= $selstr = ' selected="selected"';
+            }
+            $output .= '<option value="'.$actiontype.'"'.$selstr.'>'.$lt{$actiontype}.'</option>'."\n";
+        }
+        $output .= '</select></td>';
+    }
+    $output .= '<td>&nbsp;&nbsp;</td></tr></table>'.
+               '<p><input type="submit" value="'.
+               &mt('Update Display').'" /></p>'.
+               '<p class="LC_info">'.
+               &mt('Only changes made from servers running LON-CAPA [_1] or later are displayed.'
+                  ,'2.9.0');
+    if ($version) {
+        $output .= ' '.&mt('This LON-CAPA server is version [_1]',$version);
+    }
+    $output .= '</p><hr /><br />';
+    return $output;
+}
+
+sub slot_change_messaging {
+    my ($setting,$subject,$msg,$action) = @_;
+    my $user = $env{'user.name'};
+    my $domain = $env{'user.domain'};
+    my ($message_status,$comment_status);
+    if ($setting eq 'only_student'
+        || $setting eq 'student_and_user_notes_screen') {
+        $message_status =
+            &Apache::lonmsg::user_normal_msg($user,$domain,$subject,$msg);
+        $message_status = '<li>'.&mt('Sent to you: [_1]',
+                                    $message_status).' </li>';
+    }
+    if ($setting eq 'student_and_user_notes_screen') {
+        $comment_status =
+            &Apache::lonmsg::store_instructor_comment($subject.'<br />'.
+                                                      $msg,$user,$domain);
+        $comment_status = '<li>'.&mt('Entry added to course record (viewable by instructor): [_1]',
+                                    $comment_status).'</li>';
+    }
+    if ($message_status || $comment_status) {
+        my $msgtitle;
+        if ($action eq 'reserve') {
+            $msgtitle = &mt('Status of messages about saved reservation');
+        } elsif ($action eq 'release') {
+            $msgtitle = &mt('Status of messages about dropped reservation');
+        } elsif ($action eq 'nochange') {
+            $msgtitle = &mt('Status of messages about unchanged existing reservation');
+        }
+        return '<span class="LC_info">'.$msgtitle.'</span>'
+               .'<ul>'
+               .$message_status
+               .$comment_status
+               .'</ul><hr />';
+    }
 }
 
 sub upload_start {
     my ($r)=@_;    
-    $r->print(&Apache::grades::checkforfile_js());
-    my $result.='<table width=100% border=0><tr bgcolor="#e6ffff"><td>'."\n";
-    $result.='&nbsp;<b>'.
-	&mt('Specify a file containing the slot definitions.').
-	'</b></td></tr>'."\n";
-    $result.='<tr bgcolor=#ffffe6><td>'."\n";
-    my $upfile_select=&Apache::loncommon::upfile_select_html();
-    my $ignore=&mt('Ignore First Line');
-    $result.=<<ENDUPFORM;
-<form method="post" enctype="multipart/form-data" action="/adm/slotrequest" name="slotupload">
-<input type="hidden" name="command" value="csvuploadmap" />
-$upfile_select
-<br /><input type="button" onClick="javascript:checkUpload(this.form);" value="Upload Data" />
-<label><input type="checkbox" name="noFirstLine" />$ignore</label>
-</form>
-ENDUPFORM
-    $result.='</td></tr></table>'."\n";
-    $result.='</td></tr></table>'."\n";
-    $r->print($result);
+    $r->print(
+        &Apache::grades::checkforfile_js()
+       .'<h2>'.&mt('Upload a file containing the slot definitions').'</h2>'
+       .'<form method="post" enctype="multipart/form-data"'
+       .' action="/adm/slotrequest" name="slotupload">'
+       .'<input type="hidden" name="command" value="csvuploadmap" />'
+       .&Apache::lonhtmlcommon::start_pick_box()
+       .&Apache::lonhtmlcommon::row_title(&mt('File'))
+       .&Apache::loncommon::upfile_select_html()
+       .&Apache::lonhtmlcommon::row_closure()
+       .&Apache::lonhtmlcommon::row_title(
+            '<label for="noFirstLine">'
+           .&mt('Ignore First Line')
+           .'</label>')
+       .'<input type="checkbox" name="noFirstLine" id="noFirstLine" />'
+       .&Apache::lonhtmlcommon::row_closure(1)
+       .&Apache::lonhtmlcommon::end_pick_box()
+       .'<p>'
+       .'<input type="button" onclick="javascript:checkUpload(this.form);"'
+       .' value="'.&mt('Next').'" />'
+       .'</p>'
+      .'</form>'
+    );
 }
 
 sub csvuploadmap_header {
@@ -1278,14 +2797,40 @@ sub csvuploadmap_header {
 
     my $checked=(($env{'form.noFirstLine'})?' checked="checked"':'');
     my $ignore=&mt('Ignore First Line');
+    my $buttontext = &mt('Reverse Association');
+
+    $r->print(
+        '<form method="post" enctype="multipart/form-data" action="/adm/slotrequest" name="slotupload">'
+       .'<h2>'.&mt('Identify fields in uploaded list').'</h2>'
+       .'<div class="LC_columnSection">'
+       .&Apache::loncommon::help_open_topic(
+            'Slot About',&mt('Help on slots'))
+       .' '.&Apache::loncommon::help_open_topic(
+            'Slot SelectingField',&mt('Help on selecting Fields'))
+       ."</div>\n"
+       .'<p class="LC_info">'
+       .&mt('Total number of records found in file: [_1]','<b>'.$distotal.'</b>')
+       ."</p>\n"
+    );
+    if ($distotal == 0) {
+        $r->print('<p class="LC_warning">'.&mt('None found').'</p>');
+    }
+    $r->print(
+        '<p>'
+       .&mt('Enter as many fields as you can.').'<br />'
+       .&mt('The system will inform you and bring you back to this page,[_1]if the data selected is insufficient to create the slots.','<br />')
+       .'</p>'
+    );
+    $r->print(
+        '<div class="LC_left_float">'
+       .'<fieldset><legend>'.&mt('Functions').'</legend>'
+       .'<label><input type="checkbox" name="noFirstLine"'.$checked.' />'.$ignore.'</label>'
+       .' <input type="button" value="'.$buttontext
+           .'" onclick="javascript:this.form.associate.value=\'Reverse Association\';submit(this.form);" />'
+       .'</fieldset></div><br clear="all" />'
+    );
+
     $r->print(<<ENDPICK);
-<form method="post" enctype="multipart/form-data" action="/adm/slotrequest" name="slotupload">
-<h3>Identify fields</h3>
-Total number of records found in file: $distotal <hr />
-Enter as many fields as you can. The system will inform you and bring you back
-to this page if the data selected is insufficient to create the slots.<hr />
-<input type="button" value="Reverse Association" onClick="javascript:this.form.associate.value='Reverse Association';submit(this.form);" />
-<label><input type="checkbox" name="noFirstLine" $checked />$ignore</label>
 <input type="hidden" name="associate"  value="" />
 <input type="hidden" name="datatoken"  value="$datatoken" />
 <input type="hidden" name="fileupload" value="$env{'form.fileupload'}" />
@@ -1293,9 +2838,10 @@ to this page if the data selected is ins
 <input type="hidden" name="upfile_associate" 
                                        value="$env{'form.upfile_associate'}" />
 <input type="hidden" name="command"    value="csvuploadassign" />
-<hr />
 <script type="text/javascript" language="Javascript">
+// <![CDATA[
 $javascript
+// ]]>
 </script>
 ENDPICK
     return '';
@@ -1304,17 +2850,17 @@ ENDPICK
 
 sub csvuploadmap_footer {
     my ($request,$i,$keyfields) =@_;
+    my $buttontext = &mt('Create Slots');
     $request->print(<<ENDPICK);
-</table>
 <input type="hidden" name="nfields" value="$i" />
 <input type="hidden" name="keyfields" value="$keyfields" />
-<input type="button" onClick="javascript:verify(this.form)" value="Create Slots" /><br />
+<input type="button" onclick="javascript:verify(this.form)" value="$buttontext" /><br />
 </form>
 ENDPICK
 }
 
 sub csvupload_javascript_reverse_associate {
-    my $error1=&mt('You need to specify the name, starttime, endtime and a type');
+    my $error1=&mt('You need to specify the name, start time, end time and a type.');
     return(<<ENDPICK);
   function verify(vf) {
     var foundstart=0;
@@ -1340,7 +2886,7 @@ ENDPICK
 }
 
 sub csvupload_javascript_forward_associate {
-    my $error1=&mt('You need to specify the name, starttime, endtime and a type');
+    my $error1=&mt('You need to specify the name, start time, end time and a type.');
   return(<<ENDPICK);
   function verify(vf) {
     var foundstart=0;
@@ -1372,8 +2918,10 @@ sub csv_upload_map {
     if (!$env{'form.datatoken'}) {
 	$datatoken=&Apache::loncommon::upfile_store($r);
     } else {
-	$datatoken=$env{'form.datatoken'};
-	&Apache::loncommon::load_tmp_file($r);
+        $datatoken=&Apache::loncommon::valid_datatoken($env{'form.datatoken'});
+        if ($datatoken ne '') {
+            &Apache::loncommon::load_tmp_file($r,$datatoken);
+        }
     }
     my @records=&Apache::loncommon::upfile_record_sep();
     if ($env{'form.noFirstLine'}) { shift(@records); }
@@ -1407,11 +2955,14 @@ sub csvupload_fields {
 	    ['starttime','Start Time of slot'],
 	    ['endtime','End Time of slot'],
 	    ['startreserve','Reservation Start Time'],
+            ['endreserve','Reservation End Time'],
+            ['reservationmsg','Message when reservation changed'],
 	    ['ip','IP or DNS restriction'],
+            ['iptied','Unique IP each student'],
 	    ['proctor','List of proctor ids'],
 	    ['description','Slot Description'],
 	    ['maxspace','Maximum number of reservations'],
-	    ['symb','Resource Restriction'],
+	    ['symb','Resource(s)/Map(s) Restriction'],
 	    ['uniqueperiod','Date range of slot exclusion'],
 	    ['secret','Secret word proctor uses to validate'],
 	    ['allowedsections','Sections slot is restricted to'],
@@ -1421,11 +2972,14 @@ sub csvupload_fields {
 
 sub csv_upload_assign {
     my ($r,$mgr)= @_;
-    &Apache::loncommon::load_tmp_file($r);
+    my $datatoken = &Apache::loncommon::valid_datatoken($env{'form.datatoken'});
+    if ($datatoken ne '') {
+        &Apache::loncommon::load_tmp_file($r,$datatoken);
+    }
     my @slotdata = &Apache::loncommon::upfile_record_sep();
     if ($env{'form.noFirstLine'}) { shift(@slotdata); }
     my %fields=&Apache::grades::get_fields();
-    $r->print('<h3>Creating Slots</h3>');
+    $r->print('<h3>'.&mt('Creating Slots').'</h3>');
     my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
     my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
     my $countdone=0;
@@ -1479,8 +3033,12 @@ sub csv_upload_assign {
 	}
 
 	if ($entries{$fields{'startreserve'}}) {
-	    $slot{'startreserve'}=
-		&UnixDate($entries{$fields{'startreserve'}},"%s");
+            my $date = &UnixDate($entries{$fields{'startreserve'}},"%s");
+            if ($date eq '') {
+                push(@errors,"$name -- No reservation start time set for slot -- value provided had invalid format");
+            } else {
+                $slot{'startreserve'} = $date;
+            }
 	}
 	if (defined($slot{'startreserve'})
 	    && $slot{'startreserve'} > $slot{'starttime'}) {
@@ -1488,20 +3046,85 @@ sub csv_upload_assign {
 	    next;
 	}
 
+        if ($entries{$fields{'endreserve'}}) {
+            my $date = &UnixDate($entries{$fields{'endreserve'}},"%s");
+            if ($date eq '') {
+                push(@errors,"$name -- No reservation end time set for slot -- value provided had invalid format");
+            } else {
+                $slot{'endreserve'} = $date;
+            }
+        }
+        if (defined($slot{'endreserve'})
+            && $slot{'endreserve'} > $slot{'starttime'}) {
+            push(@errors,"$name not created -- Slot's reservation end time is after the slot's start time.");
+            next;
+        }
+
+        if ($slot{'type'} eq 'schedulable_student') {
+            if ($entries{$fields{'reservationmsg'}}) {
+                 if (($entries{$fields{'reservationmsg'}} eq 'only_student') ||
+                     ($entries{$fields{'reservationmsg'}} eq 'student_and_user_notes_screen')) {
+                      $slot{'reservationmsg'}=$entries{$fields{'reservationmsg'}};
+                 } else {
+                      unless (($entries{$fields{'reservationmsg'}} eq 'none') ||
+                              ($entries{$fields{'reservationmsg'}} eq '')) {
+                          push(@errors,"$name -- Slot's reservationmsg setting ignored - not one of: 'only_student', 'student_and_user_notes_screen', 'none' or ''");
+                      }
+                 }
+            }
+        }
+
 	foreach my $key ('ip','proctor','description','maxspace',
 			 'secret','symb') {
 	    if ($entries{$fields{$key}}) {
 		$slot{$key}=$entries{$fields{$key}};
 	    }
 	}
-
+        if ($entries{$fields{'iptied'}} =~ /^\s*(yes|1)\s*$/i) {
+            $slot{'iptied'}='yes'; 
+        } elsif ($entries{$fields{'iptied'}} =~ /^\s*answer\s*$/i) {
+            $slot{'iptied'}='answer';
+        }
+        if ($entries{$fields{'allowedusers'}}) {
+            $entries{$fields{'allowedusers'}} =~ s/^\s+//;
+            $entries{$fields{'allowedusers'}} =~ s/\s+$//;
+            my @allowedusers;
+            foreach my $poss (split(/\s*,\s*/,$entries{$fields{'allowedusers'}})) {
+                my ($possuname,$possudom) = split(/:/,$poss);
+                if (($possuname =~ /^$match_username$/) && ($possudom =~ /^$match_domain$/)) {
+                    unless (grep(/^\Q$poss\E$/,@allowedusers)) {
+                        push(@allowedusers,$poss);
+                    }
+                }
+            }
+            if (@allowedusers > 0) {
+                $slot{'allowedusers'} = join(',',@allowedusers);
+            }
+        }
+        if ($entries{$fields{'allowedsections'}}) {
+            $entries{$fields{'allowedsections'}} =~ s/^\s+//;
+            $entries{$fields{'allowedsections'}} =~ s/\s+$//;
+            my @allowedsections;
+            foreach my $poss (split(/\s*,\s*/,$entries{$fields{'allowedsections'}})) {
+                if (($poss !~ /\W/) && ($poss ne 'none')) {
+                    unless (grep(/^\Q$poss\E$/,@allowedsections)) {
+                        push(@allowedsections,$poss);
+                    }
+                }
+            }
+            if (@allowedsections > 0) {
+                $slot{'allowedsections'} = join(',',@allowedsections);
+            }
+        }
 	if ($entries{$fields{'uniqueperiod'}}) {
-	    my ($start,$end)=split(',',$entries{$fields{'uniqueperiod'}});
-	    my @times=(&UnixDate($start,"%s"),
-		       &UnixDate($end,"%s"));
-	    $slot{'uniqueperiod'}=\@times;
+            my ($start,$end)= map { &UnixDate($_,"%s"); } split(',',$entries{$fields{'uniqueperiod'}});
+            if (($start ne '') && ($end ne '')) {
+                $slot{'uniqueperiod'}=[$start,$end];
+            } else {
+                push(@errors,"$name -- Slot's unique period ignored -- one or both of the comma separated values for start and end had an invalid format");
+            }
 	}
-	if (defined($slot{'uniqueperiod'})
+	if (ref($slot{'uniqueperiod'}) eq 'ARRAY' 
 	    && $slot{'uniqueperiod'}[0] > $slot{'uniqueperiod'}[1]) {
 	    push(@errors,"$name not created -- Slot's unique period start time is later than the unique period's end time.");
 	    next;
@@ -1512,14 +3135,43 @@ sub csv_upload_assign {
 	$r->rflush();
 	$countdone++;
     }
-    $r->print("<p>Created $countdone slots\n</p>");
+    if ($countdone) {
+        &Apache::lonnet::devalidate_slots_cache($cname,$cdom); 
+    }
+    $r->print('<p>'.&mt('Created [quant,_1,slot]',$countdone)."\n".'</p>');
     foreach my $error (@errors) {
-	$r->print("<p>$error\n</p>");
+	$r->print('<p><span class="LC_warning">'.$error.'</span></p>'."\n");
     }
     &show_table($r,$mgr);
     return '';
 }
 
+sub slot_command_titles {
+    my %titles = (
+                 slotlog            => 'Reservation Logs',
+                 showslots          => 'Manage Slots',
+                 showresv           => 'Reservation History',
+                 manageresv         => 'Manage Reservations',
+                 uploadstart        => 'Upload Slots File',
+                 csvuploadmap       => 'Upload Slots File',
+                 csvuploadassign    => 'Upload Slots File',
+                 delete             => 'Slot Deletion',
+                 release            => 'Reservation Result',
+                 remove_reservation => 'Remove Registration',
+                 get_reservation    => 'Request Reservation',
+              );
+    return %titles;
+}
+
+sub slot_reservationmsg_options {
+    my %options = &Apache::lonlocal::texthash (
+                        only_student  => 'Sent to student',
+        student_and_user_notes_screen => 'Sent to student and added to user notes',
+                                 none => 'None sent and no record in user notes',
+    );
+    return %options;
+}
+
 sub handler {
     my $r=shift;
 
@@ -1531,16 +3183,84 @@ sub handler {
     }
 
     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'});
-    
+
+    my %crumb_titles = &slot_command_titles();
+    my $brcrum;
+
     my $vgr=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
     my $mgr=&Apache::lonnet::allowed('mgr',$env{'request.course.id'});
+    my (%slots,$consumed_uniqueperiods);
+    if ($env{'form.command'} eq 'showslots') {
+        if (($vgr ne 'F') && ($mgr ne 'F')) {
+            $env{'form.command'} = 'manageresv'; 
+        }
+    } elsif ($env{'form.command'} eq 'manageresv') {
+        if (($vgr eq 'F') || ($mgr eq 'F')) {
+            $env{'form.command'} = 'showslots';
+        }
+    }
     my $title='Requesting Another Worktime';
-    if ($env{'form.command'} =~ /^(showslots|uploadstart|csvuploadmap|csvuploadassign)$/ && $vgr eq 'F') {
-	$title = 'Managing Slots';
+    if ($env{'form.command'} eq 'showresv') {
+        $title = 'Reservation History';
+        if ($env{'form.origin'} eq 'aboutme') {
+            $brcrum =[{href=>"/adm/$env{'form.udom'}/$env{'form.uname'}/aboutme",text=>'Personal Information Page'}];
+        } else {
+            $brcrum =[{href=>"/adm/slotrequest?command=manageresv",text=>'Manage Reservations'}];
+        }
+        if (ref($brcrum) eq 'ARRAY') {
+            push(@{$brcrum},{href=>"/adm/slotrequest?command=showresv",text=>$title});
+        }
+    } elsif (($env{'form.requestattempt'}) || ($env{'form.command'} eq 'manageresv')) {  
+        if ($env{'form.command'} eq 'manageresv') {
+            $title = 'Manage Reservations';
+            $brcrum =[{href=>"/adm/slotrequest?command=manageresv",text=>$title}];
+        }
+        my ($cnum,$cdom)=&get_course();
+        %slots = &Apache::lonnet::get_course_slots($cnum,$cdom);
+        $consumed_uniqueperiods = &get_consumed_uniqueperiods(\%slots);
+    } elsif ($vgr eq 'F') {
+        if ($env{'form.command'} =~ /^(slotlog|showslots|uploadstart|csvuploadmap|csvuploadassign|delete|release|remove_registration)$/) {
+            $brcrum =[{href=>"/adm/slotrequest?command=showslots",
+                       text=>$crumb_titles{'showslots'}}];
+	    $title = 'Managing Slots';
+            unless ($env{'form.command'} eq 'showslots') {
+                if (ref($brcrum) eq 'ARRAY') {
+                    push(@{$brcrum},{href=>"/adm/slotrequest?command=$env{'form.command'}",text=>$crumb_titles{$env{'form.command'}}});
+                }
+            }
+        }
+    } elsif ($env{'form.command'} eq 'release') {
+        if ($env{'form.context'} eq 'usermanage') {
+            $brcrum =[{href=>"/adm/slotrequest?command=manageresv",
+                       text=>$crumb_titles{'showslots'}}];
+            $title = 'Manage Reservations';
+            if (ref($brcrum) eq 'ARRAY') {
+                push(@{$brcrum},{href=>"/adm/slotrequest?command=$env{'form.command'}",text=>$crumb_titles{$env{'form.command'}}});
+            }
+        }
+    } else {
+        $brcrum =[];
     }
-    &start_page($r,$title);
-
-    if ($env{'form.command'} eq 'showslots' && $vgr eq 'F') {
+    my ($symb,$js,$available,$allavailable,$got_slots);
+    $available = [];
+    if ($env{'form.requestattempt'}) {
+        $symb=&unescape($env{'form.symb'});
+        @{$got_slots}=&check_for_reservation($symb,'allslots');
+    }
+    if (($env{'form.requestattempt'}) || ($env{'form.command'} eq 'manageresv')) {
+        $js = &reservation_js(\%slots,$consumed_uniqueperiods,$available,$got_slots,$symb);
+    }
+    &start_page($r,$title,$brcrum,$js);
+
+    if ($env{'form.command'} eq 'manageresv') {
+        $allavailable = $available;
+        undef($available);
+        undef($got_slots);
+        my $crstype = &Apache::loncommon::course_type();
+        &manage_reservations($r,$crstype,\%slots,$consumed_uniqueperiods,$allavailable);
+    } elsif ($env{'form.command'} eq 'showresv') {
+        &show_reservations($r,$env{'form.uname'},$env{'form.udom'});
+    } elsif ($env{'form.command'} eq 'showslots' && $vgr eq 'F') {
 	&show_table($r,$mgr);
     } elsif ($env{'form.command'} eq 'remove_registration' && $mgr eq 'F') {
 	&remove_registration($r);
@@ -1567,6 +3287,8 @@ sub handler {
 	    }
 	    &csv_upload_map($r);
 	}
+    } elsif (($env{'form.command'} eq 'slotlog') && ($vgr eq 'F')) {
+        &show_reservations_log($r);
     } else {
 	my $symb=&unescape($env{'form.symb'});
 	if (!defined($symb)) {
@@ -1587,22 +3309,44 @@ sub handler {
 	my ($status) = &Apache::lonhomework::check_slot_access('0',$type);
 	if ($status eq 'CAN_ANSWER' ||
 	    $status eq 'NEEDS_CHECKIN' ||
-	    $status eq 'WAITING_FOR_GRADE') {
+	    $status eq 'WAITING_FOR_GRADE' ||
+            $status eq 'NEED_DIFFERENT_IP') {
 	    &fail($r,'not_allowed');
 	    return OK;
 	}
 	if ($env{'form.requestattempt'}) {
-	    &show_choices($r,$symb);
+            $r->print('<div class="LC_left_float">'); 
+	    $r->print(&show_choices($symb,undef,undef,undef,\%slots,$consumed_uniqueperiods,$available,$got_slots));
+            $r->print('</div><div style="padding:0;clear:both;margin:0;border:0"></div>');
 	} elsif ($env{'form.command'} eq 'release') {
 	    &release_slot($r,$symb);
 	} elsif ($env{'form.command'} eq 'get') {
 	    &get_slot($r,$symb);
 	} elsif ($env{'form.command'} eq 'change') {
-	    if (&release_slot($r,$symb,$env{'form.releaseslot'},1)) {
-		&get_slot($r,$symb);
+            if ($env{'form.nochange'}) {
+                my $slot_name = $env{'form.releaseslot'};
+                my @slots = &check_for_reservation($symb,'allslots');
+                my $msg;
+                if (($slot_name ne '') && (grep(/^\Q$slot_name\E/,@slots))) { 
+                     my %slot=&Apache::lonnet::get_slot($env{'form.releaseslot'});
+                     my $description=&get_description($slot_name,\%slot);
+                     $msg = '<span style="font-weight: bold;">'.
+                            &mt('Unchanged reservation: [_1]',$description).'</span><br /><br />';
+                     my $person = 
+                         &Apache::loncommon::plainname($env{'user.name'},$env{'user.domain'});
+                     my $subject = &mt('Reservation unchanged: [_1]',$description);
+                     my $msgbody = &mt('No change to existing registration by [_1] for [_2].',$person,$description);
+                     $msg .= &slot_change_messaging($slot{'reservationmsg'},$subject,$msgbody,'nochange');
+                } else {
+                    $msg = '<span class="LC_warning">'.&mt('Reservation no longer reported as available.').'</span>';
+                }
+                $r->print($msg);
+                &return_link($r);
+	    } elsif (&get_slot($r,$symb,$env{'form.releaseslot'},1)) {
+		&release_slot($r,$symb,$env{'form.releaseslot'});
 	    }
 	} else {
-	    $r->print("<p>Unknown command: ".$env{'form.command'}."</p>");
+	    $r->print('<p>'.&mt('Unknown command: [_1]',$env{'form.command'}).'</p>');
 	}
     }
     &end_page($r);