File:  [LON-CAPA] / loncom / interface / slotrequest.pm
Revision 1.112: download - view: text, annotated - select for diffs
Tue Dec 20 22:44:27 2011 UTC (12 years, 6 months ago) by raeburn
Branches: MAIN
CVS tags: HEAD, BZ4492-merge, BZ4492-feature_horizontal_radioresponse
- RESERVABLE_LATER status provides appropriate message on manage reservations screen
- devalidate allslots cache when changes made to a slot.

    1: # The LearningOnline Network with CAPA
    2: # Handler for requesting to have slots added to a students record
    3: #
    4: # $Id: slotrequest.pm,v 1.112 2011/12/20 22:44:27 raeburn Exp $
    5: #
    6: # Copyright Michigan State University Board of Trustees
    7: #
    8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
    9: #
   10: # LON-CAPA is free software; you can redistribute it and/or modify
   11: # it under the terms of the GNU General Public License as published by
   12: # the Free Software Foundation; either version 2 of the License, or
   13: # (at your option) any later version.
   14: #
   15: # LON-CAPA is distributed in the hope that it will be useful,
   16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
   17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   18: # GNU General Public License for more details.
   19: #
   20: # You should have received a copy of the GNU General Public License
   21: # along with LON-CAPA; if not, write to the Free Software
   22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   23: #
   24: # /home/httpd/html/adm/gpl.txt
   25: #
   26: # http://www.lon-capa.org/
   27: #
   28: ###
   29: 
   30: package Apache::slotrequest;
   31: 
   32: use strict;
   33: use Apache::Constants qw(:common :http :methods);
   34: use Apache::loncommon();
   35: use Apache::lonlocal;
   36: use Apache::lonnet;
   37: use Apache::lonnavmaps();
   38: use Date::Manip;
   39: use lib '/home/httpd/lib/perl/';
   40: use LONCAPA;
   41: 
   42: sub fail {
   43:     my ($r,$code)=@_;
   44:     if ($code eq 'not_valid') {
   45: 	$r->print('<p>'.&mt('Unable to understand what resource you wanted to sign up for.').'</p>');
   46:     } elsif ($code eq 'not_available') {
   47: 	$r->print('<p>'.&mt('No slots are available.').'</p>');
   48:     } elsif ($code eq 'not_allowed') {
   49: 	$r->print('<p>'.&mt('Not allowed to sign up or change reservations at this time.').'</p>');
   50:     } else {
   51: 	$r->print('<p>'.&mt('Failed.').'</p>');
   52:     }
   53:     
   54:     &return_link($r);
   55:     &end_page($r);
   56: }
   57: 
   58: sub start_page {
   59:     my ($r,$title,$brcrum)=@_;
   60:     my $args;
   61:     if (ref($brcrum) eq 'ARRAY') {
   62:         $args = {bread_crumbs => $brcrum};
   63:     }
   64:     $r->print(&Apache::loncommon::start_page($title,undef,$args));
   65: }
   66: 
   67: sub end_page {
   68:     my ($r)=@_;
   69:     $r->print(&Apache::loncommon::end_page());
   70: }
   71: 
   72: =pod
   73: 
   74:  slot_reservations db
   75:    - keys are 
   76:     - slotname\0id -> value is an hashref of
   77:                          name -> user@domain of holder
   78:                          timestamp -> timestamp of reservation
   79:                          symb -> symb of resource that it is reserved for
   80: 
   81: =cut
   82: 
   83: sub get_course {
   84:     (undef,my $courseid)=&Apache::lonnet::whichuser();
   85:     my $cdom=$env{'course.'.$courseid.'.domain'};
   86:     my $cnum=$env{'course.'.$courseid.'.num'};
   87:     return ($cnum,$cdom);
   88: }
   89: 
   90: sub get_reservation_ids {
   91:     my ($slot_name)=@_;
   92:     
   93:     my ($cnum,$cdom)=&get_course();
   94: 
   95:     my %consumed=&Apache::lonnet::dump('slot_reservations',$cdom,$cnum,
   96: 				       "^$slot_name\0");
   97:     if (&Apache::lonnet::error(%consumed)) { 
   98: 	return 'error: Unable to determine current status';
   99:     }
  100:     my ($tmp)=%consumed;
  101:     if ($tmp=~/^error: 2 / ) {
  102: 	return 0;
  103:     }
  104:     return keys(%consumed);
  105: }
  106: 
  107: sub space_available {
  108:     my ($slot_name,$slot)=@_;
  109:     my $max=$slot->{'maxspace'};
  110: 
  111:     if (!defined($max)) { return 1; }
  112: 
  113:     my $consumed=scalar(&get_reservation_ids($slot_name));
  114:     if ($consumed < $max) {
  115: 	return 1
  116:     }
  117:     return 0;
  118: }
  119: 
  120: sub check_for_reservation {
  121:     my ($symb,$mode)=@_;
  122:     my $student = &Apache::lonnet::EXT("resource.0.availablestudent", $symb,
  123: 				       $env{'user.domain'}, $env{'user.name'});
  124: 
  125:     my $course = &Apache::lonnet::EXT("resource.0.available", $symb,
  126: 				    $env{'user.domain'}, $env{'user.name'});
  127:     my @slots = (split(/:/,$student), split(/:/, $course));
  128: 
  129:     &Apache::lonxml::debug(" slot list is ".join(':',@slots));
  130: 
  131:     my ($cnum,$cdom)=&get_course();
  132:     my %slots=&Apache::lonnet::get('slots', [@slots], $cdom, $cnum);
  133: 
  134:     if (&Apache::lonnet::error($student) 
  135: 	|| &Apache::lonnet::error($course)
  136: 	|| &Apache::lonnet::error(%slots)) {
  137: 	return 'error: Unable to determine current status';
  138:     }    
  139:     my @got;
  140:     my @sorted_slots = &Apache::loncommon::sorted_slots(\@slots,\%slots,'starttime');
  141:     foreach my $slot_name (@sorted_slots) {
  142: 	next if (!defined($slots{$slot_name}) ||
  143: 		 !ref($slots{$slot_name}));
  144: 	&Apache::lonxml::debug(time." $slot_name ".
  145: 			       $slots{$slot_name}->{'starttime'}." -- ".
  146: 			       $slots{$slot_name}->{'startreserve'}." -- ".
  147:                                $slots{$slot_name}->{'endreserve'});
  148: 	if (($slots{$slot_name}->{'endtime'} > time) &&
  149: 	    ($slots{$slot_name}->{'startreserve'} < time) &&
  150:             ((!$slots{$slot_name}->{'endreserve'}) || 
  151:              ($slots{$slot_name}->{'endreserve'} > time))) {
  152: 	    # between start of reservation time and end of reservation time
  153:             # and before end of slot
  154: 	    if ($mode eq 'allslots') {
  155: 		push(@got,$slot_name);
  156: 	    } else {
  157: 		return($slot_name, $slots{$slot_name});
  158: 	    }
  159: 	}
  160:     }
  161:     if ($mode eq 'allslots' && @got) {
  162: 	return @got;
  163:     }
  164:     return (undef,undef);
  165: }
  166: 
  167: sub get_consumed_uniqueperiods {
  168:     my ($slots) = @_;
  169:     my $navmap=Apache::lonnavmaps::navmap->new;
  170:     if (!defined($navmap)) {
  171:         return 'error: Unable to determine current status';
  172:     }
  173:     my @problems = $navmap->retrieveResources(undef,
  174: 					      sub { $_[0]->is_problem() },1,0);
  175:     my %used_slots;
  176:     foreach my $problem (@problems) {
  177: 	my $symb = $problem->symb();
  178: 	my $student = &Apache::lonnet::EXT("resource.0.availablestudent",
  179: 					   $symb, $env{'user.domain'},
  180: 					   $env{'user.name'});
  181: 	my $course =  &Apache::lonnet::EXT("resource.0.available",
  182: 					   $symb, $env{'user.domain'},
  183: 					   $env{'user.name'});
  184: 	if (&Apache::lonnet::error($student) 
  185: 	    || &Apache::lonnet::error($course)) {
  186: 	    return 'error: Unable to determine current status';
  187: 	}
  188: 	foreach my $slot (split(/:/,$student), split(/:/, $course)) {
  189: 	    $used_slots{$slot}=1;
  190: 	}
  191:     }
  192: 
  193:     if (!ref($slots)) {
  194: 	my ($cnum,$cdom)=&get_course();
  195: 	my %slots=&Apache::lonnet::get('slots', [keys(%used_slots)], $cdom, $cnum);
  196: 	if (&Apache::lonnet::error(%slots)) {
  197: 	    return 'error: Unable to determine current status';
  198: 	}
  199: 	$slots = \%slots;
  200:     }
  201: 
  202:     my %consumed_uniqueperiods;
  203:     foreach my $slot_name (keys(%used_slots)) {
  204: 	next if (!defined($slots->{$slot_name}) ||
  205: 		 !ref($slots->{$slot_name}));
  206: 	
  207:         next if (!defined($slots->{$slot_name}{'uniqueperiod'}) ||
  208: 		 !ref($slots->{$slot_name}{'uniqueperiod'}));
  209: 	$consumed_uniqueperiods{$slot_name} = 
  210: 	    $slots->{$slot_name}{'uniqueperiod'};
  211:     }
  212:     return \%consumed_uniqueperiods;
  213: }
  214: 
  215: sub check_for_conflict {
  216:     my ($symb,$new_slot_name,$new_slot,$slots,$consumed_uniqueperiods)=@_;
  217: 
  218:     if (!defined($new_slot->{'uniqueperiod'})) { return undef; }
  219: 
  220:     if (!ref($consumed_uniqueperiods)) {
  221: 	$consumed_uniqueperiods = &get_consumed_uniqueperiods($slots);
  222:         if (ref($consumed_uniqueperiods) eq 'HASH') {
  223: 	    if (&Apache::lonnet::error(%$consumed_uniqueperiods)) {
  224: 	        return 'error: Unable to determine current status';
  225: 	    }
  226:         } else {
  227:             return 'error: Unable to determine current status';
  228:         }
  229:     }
  230:     
  231:     my ($new_uniq_start,$new_uniq_end) = @{$new_slot->{'uniqueperiod'}};
  232:     foreach my $slot_name (keys(%$consumed_uniqueperiods)) {
  233: 	my ($start,$end)=@{$consumed_uniqueperiods->{$slot_name}};
  234: 	if (!
  235: 	    ($start < $new_uniq_start &&  $end < $new_uniq_start) ||
  236: 	    ($start > $new_uniq_end   &&  $end > $new_uniq_end  )) {
  237: 	    return $slot_name;
  238: 	}
  239:     }
  240:     return undef;
  241: }
  242: 
  243: sub make_reservation {
  244:     my ($slot_name,$slot,$symb,$cnum,$cdom)=@_;
  245: 
  246:     my $value=&Apache::lonnet::EXT("resource.0.availablestudent",$symb,
  247: 				   $env{'user.domain'},$env{'user.name'});
  248:     &Apache::lonxml::debug("value is  $value<br />");
  249: 
  250:     my $use_slots = &Apache::lonnet::EXT("resource.0.useslots",$symb,
  251: 					 $env{'user.domain'},$env{'user.name'});
  252:     &Apache::lonxml::debug("use_slots is  $use_slots<br />");
  253: 
  254:     if (&Apache::lonnet::error($value) 
  255: 	|| &Apache::lonnet::error($use_slots)) { 
  256: 	return 'error: Unable to determine current status';
  257:     }
  258: 
  259:     my $parm_symb  = $symb;
  260:     my $parm_level = 1;
  261:     if ($use_slots eq 'map' || $use_slots eq 'map_map') {
  262: 	my ($map) = &Apache::lonnet::decode_symb($symb);
  263: 	$parm_symb = &Apache::lonnet::symbread($map);
  264: 	$parm_level = 2;
  265:     }
  266: 
  267:     foreach my $other_slot (split(/:/, $value)) {
  268: 	if ($other_slot eq $slot_name) {
  269: 	    my %consumed=&Apache::lonnet::dump('slot_reservations', $cdom,
  270: 					       $cnum, "^$slot_name\0");   
  271: 	    if (&Apache::lonnet::error($value)) { 
  272: 		return 'error: Unable to determine current status';
  273: 	    }
  274: 	    my $me=$env{'user.name'}.':'.$env{'user.domain'};
  275: 	    foreach my $key (keys(%consumed)) {
  276: 		if ($consumed{$key}->{'name'} eq $me) {
  277: 		    my $num=(split('\0',$key))[1];
  278: 		    return -$num;
  279: 		}
  280: 	    }
  281: 	}
  282:     }
  283: 
  284:     my $max=$slot->{'maxspace'};
  285:     if (!defined($max)) { $max=99999; }
  286: 
  287:     my (@ids)=&get_reservation_ids($slot_name);
  288:     if (&Apache::lonnet::error(@ids)) { 
  289: 	return 'error: Unable to determine current status';
  290:     }
  291:     my $last=0;
  292:     foreach my $id (@ids) {
  293: 	my $num=(split('\0',$id))[1];
  294: 	if ($num > $last) { $last=$num; }
  295:     }
  296:     
  297:     my $wanted=$last+1;
  298:     &Apache::lonxml::debug("wanted $wanted<br />");
  299:     if (scalar(@ids) >= $max) {
  300: 	# full up
  301: 	return undef;
  302:     }
  303:     
  304:     my %reservation=('name'      => $env{'user.name'}.':'.$env{'user.domain'},
  305: 		     'timestamp' => time,
  306: 		     'symb'      => $parm_symb);
  307: 
  308:     my $success=&Apache::lonnet::newput('slot_reservations',
  309: 					{"$slot_name\0$wanted" =>
  310: 					     \%reservation},
  311: 					$cdom, $cnum);
  312: 
  313:     if ($success eq 'ok') {
  314: 	my $new_value=$slot_name;
  315: 	if ($value) {
  316: 	    $new_value=$value.':'.$new_value;
  317: 	}
  318:         &store_slot_parm($symb,$slot_name,$parm_level,$new_value,$cnum,$cdom);
  319: 	return $wanted;
  320:     }
  321: 
  322:     # someone else got it
  323:     return undef;
  324: }
  325: 
  326: sub store_slot_parm {
  327:     my ($symb,$slot_name,$parm_level,$new_value,$cnum,$cdom) = @_;
  328:     my $result=&Apache::lonparmset::storeparm_by_symb($symb,
  329:                                                   '0_availablestudent',
  330:                                                    $parm_level, $new_value,
  331:                                                    'string',
  332:                                                    $env{'user.name'},
  333:                                                    $env{'user.domain'});
  334:     &Apache::lonxml::debug("hrrm $result");
  335:     my %storehash = (
  336:                        symb    => $symb,
  337:                        slot    => $slot_name,
  338:                        action  => 'reserve',
  339:                        context => $env{'form.context'},
  340:                     );
  341: 
  342:     &Apache::lonnet::instructor_log('slotreservationslog',\%storehash,
  343:                                     '',$env{'user.name'},$env{'user.domain'},
  344:                                     $cnum,$cdom);
  345:     &Apache::lonnet::instructor_log($cdom.'_'.$cnum.'_slotlog',\%storehash,
  346:                                     1,$env{'user.name'},$env{'user.domain'},
  347:                                     $env{'user.name'},$env{'user.domain'});
  348: 
  349:     return;
  350: }
  351: 
  352: sub remove_registration {
  353:     my ($r) = @_;
  354:     if ($env{'form.entry'} ne 'remove all') {
  355: 	return &remove_registration_user($r);
  356:     }
  357:     my $slot_name = $env{'form.slotname'};
  358:     my %slot=&Apache::lonnet::get_slot($slot_name);
  359: 
  360:     my ($cnum,$cdom)=&get_course();
  361:     my %consumed=&Apache::lonnet::dump('slot_reservations',$cdom,$cnum,
  362: 				       "^$slot_name\0");
  363:     if (&Apache::lonnet::error(%consumed)) {
  364: 	$r->print("<p><span class=\"LC_error\">".&mt('A network error has occurred.').'</span></p>');
  365: 	return;
  366:     }
  367:     if (!%consumed) {
  368: 	$r->print('<p>'.&mt('Slot [_1] has no reservations.',
  369: 			    '<tt>'.$slot_name.'</tt>').'</p>');
  370: 	return;
  371:     }
  372: 
  373:     my @names = map { $consumed{$_}{'name'} } (sort(keys(%consumed)));
  374:     my $names = join(' ',@names);
  375: 
  376:     my $msg = &mt('Remove all of [_1] from slot [_2]?',$names,$slot_name);
  377:     &remove_registration_confirmation($r,$msg,['entry','slotname','context']);
  378: }
  379: 
  380: sub remove_registration_user {
  381:     my ($r) = @_;
  382:     
  383:     my $slot_name = $env{'form.slotname'};
  384: 
  385:     my $name = &Apache::loncommon::plainname($env{'form.uname'},
  386: 					     $env{'form.udom'});
  387: 
  388:     my $title = &Apache::lonnet::gettitle($env{'form.symb'});
  389: 
  390:     my $msg = &mt('Remove [_1] from slot [_2] for [_3]',
  391: 		  $name,$slot_name,$title);
  392:     
  393:     &remove_registration_confirmation($r,$msg,['uname','udom','slotname',
  394: 					       'entry','symb','context']);
  395: }
  396: 
  397: sub remove_registration_confirmation {
  398:     my ($r,$msg,$inputs) =@_;
  399: 
  400:     my $hidden_input;
  401:     foreach my $parm (@{$inputs}) {
  402: 	$hidden_input .=
  403: 	    '<input type="hidden" name="'.$parm.'" value="'
  404: 	    .&HTML::Entities::encode($env{'form.'.$parm},'"<>&\'').'" />'."\n";
  405:     }
  406:     my %lt = &Apache::lonlocal::texthash(
  407:         'yes' => 'Yes',
  408:         'no'  => 'No',
  409:     );
  410:     $r->print(<<"END_CONFIRM");
  411: <p> $msg </p>
  412: <form action="/adm/slotrequest" method="post">
  413:     <input type="hidden" name="command" value="release" />
  414:     <input type="hidden" name="button" value="yes" />
  415:     $hidden_input
  416:     <input type="submit" value="$lt{'yes'}" />
  417: </form>
  418: <form action="/adm/slotrequest" method="post">
  419:     <input type="hidden" name="command" value="showslots" />
  420:     <input type="submit" value="$lt{'no'}" />
  421: </form>
  422: END_CONFIRM
  423: 
  424: }
  425: 
  426: sub release_all_slot {
  427:     my ($r,$mgr)=@_;
  428:     
  429:     my $slot_name = $env{'form.slotname'};
  430: 
  431:     my ($cnum,$cdom)=&get_course();
  432: 
  433:     my %consumed=&Apache::lonnet::dump('slot_reservations',$cdom,$cnum,
  434: 				       "^$slot_name\0");
  435:     
  436:     $r->print('<p>'.&mt('Releasing reservations').'</p>');
  437: 
  438:     foreach my $entry (sort { $consumed{$a}{'name'} cmp 
  439: 				  $consumed{$b}{'name'} } (keys(%consumed))) {
  440: 	my ($uname,$udom) = split(':',$consumed{$entry}{'name'});
  441: 	my ($result,$msg) =
  442: 	    &release_reservation($slot_name,$uname,$udom,
  443: 				 $consumed{$entry}{'symb'},$mgr);
  444:         if (!$result) {
  445:             $r->print('<p><span class="LC_error">'.&mt($msg).'</span></p>');
  446:         } else {
  447: 	    $r->print("<p>$msg</p>");
  448:         }
  449: 	$r->rflush();
  450:     }
  451:     $r->print('<p><a href="/adm/slotrequest?command=showslots">'.
  452: 	      &mt('Return to slot list').'</a></p>');
  453:     &return_link($r);
  454: }
  455: 
  456: sub release_slot {
  457:     my ($r,$symb,$slot_name,$inhibit_return_link,$mgr)=@_;
  458: 
  459:     if ($slot_name eq '') { $slot_name=$env{'form.slotname'}; }
  460: 
  461:     my ($uname,$udom) = ($env{'user.name'}, $env{'user.domain'});
  462:     if ($mgr eq 'F' 
  463: 	&& defined($env{'form.uname'}) && defined($env{'form.udom'})) {
  464: 	($uname,$udom) = ($env{'form.uname'}, $env{'form.udom'});
  465:     }
  466: 
  467:     if ($mgr eq 'F' 
  468: 	&& defined($env{'form.symb'})) {
  469: 	$symb = &unescape($env{'form.symb'});
  470:     }
  471: 
  472:     my ($result,$msg) =
  473: 	&release_reservation($slot_name,$uname,$udom,$symb,$mgr);
  474:     if (!$result) {
  475:         $r->print('<p><span class="LC_error">'.&mt($msg).'</span></p>');
  476:     } else {
  477:         $r->print("<p>$msg</p>");
  478:     }
  479:     
  480:     if ($mgr eq 'F') {
  481: 	$r->print('<p><a href="/adm/slotrequest?command=showslots">'.
  482: 		  &mt('Return to slot list').'</a></p>');
  483:     }
  484: 
  485:     if (!$inhibit_return_link) { &return_link($r);  }
  486:     return $result;
  487: }
  488: 
  489: sub release_reservation {
  490:     my ($slot_name,$uname,$udom,$symb,$mgr) = @_;
  491:     my %slot=&Apache::lonnet::get_slot($slot_name);
  492:     my $description=&get_description($slot_name,\%slot);
  493: 
  494:     if ($mgr ne 'F') {
  495: 	if ($slot{'starttime'} < time) {
  496: 	    return (0,&mt('Not allowed to release Reservation: [_1], as it has already ended.',$description));
  497: 	}
  498:     }
  499: 
  500:     # if the reservation symb is for a map get a resource in that map
  501:     # to check slot parameters on
  502:     my $navmap=Apache::lonnavmaps::navmap->new;
  503:     if (!defined($navmap)) {
  504:         return (0,'error: Unable to determine current status');
  505:     }
  506:     my $passed_resource = $navmap->getBySymb($symb);
  507:     if ($passed_resource->is_map()) {
  508: 	my ($a_resource) = 
  509: 	    $navmap->retrieveResources($passed_resource, 
  510: 				       sub {$_[0]->is_problem()},0,1);
  511: 	$symb = $a_resource->symb();
  512:     }
  513: 
  514:     # get parameter string, check for existance, rebuild string with the slot
  515:     my $student = &Apache::lonnet::EXT("resource.0.availablestudent",
  516:                                        $symb,$udom,$uname);
  517:     my @slots = split(/:/,$student);
  518: 
  519:     my @new_slots;
  520:     foreach my $exist_slot (@slots) {
  521: 	if ($exist_slot eq $slot_name) { next; }
  522: 	push(@new_slots,$exist_slot);
  523:     }
  524:     my $new_param = join(':',@new_slots);
  525: 
  526:     my ($cnum,$cdom)=&get_course();
  527: 
  528:     # get slot reservations, check if user has one, if so remove reservation
  529:     my %consumed=&Apache::lonnet::dump('slot_reservations',$cdom,$cnum,
  530: 				       "^$slot_name\0");
  531:     foreach my $entry (keys(%consumed)) {
  532: 	if ( $consumed{$entry}->{'name'} eq ($uname.':'.$udom) ) {
  533: 	    &Apache::lonnet::del('slot_reservations',[$entry],
  534: 				 $cdom,$cnum);
  535:             my %storehash = (
  536:                                symb    => $symb,
  537:                                slot    => $slot_name,
  538:                                action  => 'release',
  539:                                context => $env{'form.context'},
  540:                         );
  541:             &Apache::lonnet::instructor_log('slotreservationslog',\%storehash,
  542:                                             1,$uname,$udom,$cnum,$cdom);
  543:             &Apache::lonnet::instructor_log($cdom.'_'.$cnum.'_slotlog',\%storehash,
  544:                                             1,$uname,$udom,$uname,$udom);
  545: 	}
  546:     }
  547: 
  548:     my $use_slots = &Apache::lonnet::EXT("resource.0.useslots",
  549: 					 $symb,$udom,$uname);
  550:     &Apache::lonxml::debug("use_slots is  $use_slots<br />");
  551: 
  552:     if (&Apache::lonnet::error($use_slots)) { 
  553: 	return (0,'error: Unable to determine current status');
  554:     }
  555: 
  556:     my $parm_level = 1;
  557:     if ($use_slots eq 'map' || $use_slots eq 'map_map') {
  558: 	$parm_level = 2;
  559:     }
  560:     # store new parameter string
  561:     my $result=&Apache::lonparmset::storeparm_by_symb($symb,
  562: 						      '0_availablestudent',
  563: 						      $parm_level, $new_param,
  564: 						      'string', $uname, $udom);
  565:     my $msg;
  566:     if ($mgr eq 'F') {
  567: 	$msg = &mt('Released Reservation for user: [_1]',"$uname:$udom");
  568:     } else {
  569: 	$msg = '<span style="font-weight: bold;">'.&mt('Released reservation: [_1]',$description).'</span><br /><br />';
  570:         my $person = &Apache::loncommon::plainname($env{'user.name'},$env{'user.domain'});
  571:         my $subject = &mt('Reservation change: [_1]',$description);
  572:         my $msgbody = &mt('Reservation released by [_1] for [_2].',$person,$description);
  573:         $msg .= &slot_change_messaging($slot{'reservationmsg'},$subject,$msgbody,'release');
  574:     }
  575:     return (1,$msg);
  576: }
  577: 
  578: sub delete_slot {
  579:     my ($r)=@_;
  580: 
  581:     my $slot_name = $env{'form.slotname'};
  582:     my %slot=&Apache::lonnet::get_slot($slot_name);
  583: 
  584:     my ($cnum,$cdom)=&get_course();
  585:     my %consumed=&Apache::lonnet::dump('slot_reservations',$cdom,$cnum,
  586: 				       "^$slot_name\0");
  587:     my ($tmp) = %consumed;
  588:     if ($tmp =~ /error: 2/) { undef(%consumed); }
  589: 
  590:     if (%slot && !%consumed) {
  591: 	$slot{'type'} = 'deleted';
  592: 	my $ret = &Apache::lonnet::cput('slots', {$slot_name => \%slot},
  593: 					$cdom, $cnum);
  594: 	if ($ret eq 'ok') {
  595: 	    $r->print('<p>'.&mt('Slot [_1] marked as deleted.','<tt>'.$slot_name.'</tt>').'</p>');
  596: 	} else {
  597: 	    $r->print('<p><span class="LC_error">'.&mt('An error occurred when attempting to delete slot: [_1]','<tt>'.$slot_name.'</tt>')." ($ret)</span></p>");
  598: 	}
  599:     } else {
  600: 	if (%consumed) {
  601: 	    $r->print('<p>'.&mt('Slot [_1] has active reservations.','<tt>'.$slot_name.'</tt>').'</p>');
  602: 	} else {
  603: 	    $r->print('<p>'.&mt('Slot [_1] does not exist.','<tt>'.$slot_name.'</tt>').'</p>');
  604: 	}
  605:     }
  606:     $r->print('<p><a href="/adm/slotrequest?command=showslots">'.
  607: 	      &mt('Return to slot list').'</a></p>');
  608:     &return_link($r);
  609: }
  610: 
  611: sub return_link {
  612:     my ($r) = @_;
  613:     if (($env{'form.command'} eq 'manageresv') || ($env{'form.context'} eq 'usermanage')) {
  614: 	$r->print('<p><a href="/adm/slotrequest?command=manageresv">'.
  615:                   &mt('Return to reservations'));  
  616:     } else {
  617:         $r->print('<p><a href="/adm/flip?postdata=return:">'.
  618: 	          &mt('Return to last resource').'</a></p>');
  619:     }
  620: }
  621: 
  622: sub get_slot {
  623:     my ($r,$symb,$conflictable_slot,$inhibit_return_link)=@_;
  624: 
  625:     my %slot=&Apache::lonnet::get_slot($env{'form.slotname'});
  626:     my $slot_name=&check_for_conflict($symb,$env{'form.slotname'},\%slot);
  627: 
  628:     if ($slot_name =~ /^error: (.*)/) {
  629: 	$r->print('<p><span class="LC_error">'
  630:                  .&mt('An error occurred while attempting to make a reservation. ([_1])',$1)
  631:                  .'</span></p>');
  632: 	&return_link($r);
  633: 	return 0;
  634:     }
  635:     if ($slot_name && $slot_name ne $conflictable_slot) {
  636: 	my %slot=&Apache::lonnet::get_slot($slot_name);
  637: 	my $description1=&get_description($slot_name,\%slot);
  638: 	%slot=&Apache::lonnet::get_slot($env{'form.slotname'});
  639: 	my $description2=&get_description($env{'form.slotname'},\%slot);
  640: 	if ($slot_name ne $env{'form.slotname'}) {
  641: 	    $r->print(<<STUFF);
  642: <form method="post" action="/adm/slotrequest">
  643:    <input type="hidden" name="symb" value="$env{'form.symb'}" />
  644:    <input type="hidden" name="slotname" value="$env{'form.slotname'}" />
  645:    <input type="hidden" name="releaseslot" value="$slot_name" />
  646:    <input type="hidden" name="command" value="change" />
  647: STUFF
  648:             $r->print('<p class="LC_error">'.&mt('Reservation currently unchanged').'</p>');
  649:             if ($slot_name ne '') {
  650:                 $r->print('<p>'.&mt('To complete the transaction you [_1]must confirm[_2] you want to [_3]process the change[_4] to [_5].'
  651:                          ,'<b>','</b>','<i>','</i>','<b>'.$description2.'</b>')
  652:                          .'<br />'
  653:                          .&mt('Or you can choose to [_1]make no change[_2] and continue[_2] with the reservation you already had: [_3].'
  654:                          ,'<i>','</i>','<b>'.$description1.'</b>')
  655:                          .'</p><p><span class="LC_nobreak">'
  656:                          .'<input type="submit" name="change" value="'.&mt('Process the change').'" />' 
  657:                          .('&nbsp;'x3)
  658:                          .'<input type="submit" name="nochange" value="'.&mt('Make no change').'" />'
  659:                          .'</span></p>');
  660:             }
  661: 	    $r->print(<<STUFF);
  662: </form>
  663: STUFF
  664:         } else {
  665:             $r->print('<p>'.&mt('Already have a reservation: [_1].',$description1).'</p>');
  666: 	    &return_link($r);
  667: 	}
  668: 	return 0;
  669:     }
  670: 
  671:     my ($cnum,$cdom)=&get_course();
  672:     my $reserved=&make_reservation($env{'form.slotname'},
  673: 				   \%slot,$symb,$cnum,$cdom);
  674:     my $description=&get_description($env{'form.slotname'},\%slot);
  675:     if (defined($reserved)) {
  676: 	my $retvalue = 0;
  677: 	if ($slot_name =~ /^error: (.*)/) {
  678: 	    $r->print('<p><span class="LC_error">'
  679:                      .&mt('An error occurred while attempting to make a reservation. ([_1])',$1)
  680:                      .'</span></p>');
  681: 	} elsif ($reserved > -1) {
  682: 	    $r->print('<p style="font-weight: bold;">'.&mt('Successfully signed up:  [_1]',$description).'</p>');
  683: 	    $retvalue = 1;
  684:             my $person = &Apache::loncommon::plainname($env{'user.name'},$env{'user.domain'});
  685:             my $subject = &mt('Reservation change: [_1]',$description);
  686:             my $msgbody = &mt('Successful reservation by [_1] for [_2].',$person,$description);
  687:             my $msg = &slot_change_messaging($slot{'reservationmsg'},$subject,$msgbody,'reserve');
  688:             if ($msg) {
  689:                 $r->print($msg);
  690:             }
  691: 	} elsif ($reserved < 0) {
  692: 	    $r->print('<p>'.&mt('Already reserved: [_1]',$description).'</p>');
  693: 	}
  694: 	if (!$inhibit_return_link) { &return_link($r); }
  695: 	return 1;
  696:     }
  697: 
  698:     my %lt = &Apache::lonlocal::texthash(
  699:         'request' => 'Availibility list',
  700:         'try'     => 'Try again?',
  701:         'or'      => 'or',
  702:     );
  703: 
  704:     my $extra_input;
  705:     if ($conflictable_slot) {
  706: 	$extra_input='<input type="hidden" name="releaseslot" value="'.$env{'form.slotname'}.'" />';
  707:     }
  708: 
  709:     $r->print('<p>'.&mt('[_1]Failed[_2] to reserve a slot for [_3].','<span class="LC_warning">','</span>',$description).'</p>');
  710:     $r->print(<<STUFF);
  711: <p>
  712: <form method="post" action="/adm/slotrequest">
  713:    <input type="submit" name="Try Again" value="$lt{'try'}" />
  714:    <input type="hidden" name="symb" value="$env{'form.symb'}" />
  715:    <input type="hidden" name="slotname" value="$env{'form.slotname'}" />
  716:    <input type="hidden" name="command" value="$env{'form.command'}" />
  717:    $extra_input
  718: </form>
  719: </p>
  720: <p>
  721: $lt{'or'}
  722: <form method="post" action="/adm/slotrequest">
  723:     <input type="hidden" name="symb" value="$env{'form.symb'}" />
  724:     <input type="submit" name="requestattempt" value="$lt{'request'}" />
  725: </form>
  726: STUFF
  727: 
  728:     if (!$inhibit_return_link) { 
  729:         $r->print(&mt('or').'</p>');
  730:         &return_link($r);
  731:     } else {
  732:         $r->print('</p>');
  733:     }
  734:     return 0;
  735: }
  736: 
  737: sub allowed_slot {
  738:     my ($slot_name,$slot,$symb,$slots,$consumed_uniqueperiods)=@_;
  739: 
  740:     #already started
  741:     if ($slot->{'starttime'} < time) {
  742: 	return 0;
  743:     }
  744:     &Apache::lonxml::debug("$slot_name starttime good");
  745: 
  746:     #already ended
  747:     if ($slot->{'endtime'} < time) {
  748: 	return 0;
  749:     }
  750:     &Apache::lonxml::debug("$slot_name endtime good");
  751: 
  752:     # not allowed to pick this one
  753:     if (defined($slot->{'type'})
  754: 	&& $slot->{'type'} ne 'schedulable_student') {
  755: 	return 0;
  756:     }
  757:     &Apache::lonxml::debug("$slot_name type good");
  758: 
  759:     # reserve time not yet started
  760:     if ($slot->{'startreserve'} > time) {
  761: 	return 0;
  762:     }
  763:     # reserve time ended
  764:     if (($slot->{'endreserve'}) &&
  765:         ($slot->{'endreserve'} < time)) {
  766:         return 0;
  767:     }    
  768:     &Apache::lonxml::debug("$slot_name reserve good");
  769: 
  770:     my $userallowed=0;
  771:     # its for a different set of users
  772:     if (defined($slot->{'allowedsections'})) {
  773: 	if (!defined($env{'request.role.sec'})
  774: 	    && grep(/^No section assigned$/,
  775: 		    split(',',$slot->{'allowedsections'}))) {
  776: 	    $userallowed=1;
  777: 	}
  778: 	if (defined($env{'request.role.sec'})
  779: 	    && grep(/^\Q$env{'request.role.sec'}\E$/,
  780: 		    split(',',$slot->{'allowedsections'}))) {
  781: 	    $userallowed=1;
  782: 	}
  783: 	if (defined($env{'request.course.groups'})) {
  784: 	    my @groups = split(/:/,$env{'request.course.groups'});
  785: 	    my @allowed_sec = split(',',$slot->{'allowedsections'});
  786: 	    foreach my $group (@groups) {
  787: 		if (grep {$_ eq $group} (@allowed_sec)) {
  788: 		    $userallowed=1;
  789: 		    last;
  790: 		}
  791: 	    }
  792: 	}
  793:     }
  794:     &Apache::lonxml::debug("$slot_name sections is $userallowed");
  795: 
  796:     # its for a different set of users
  797:     if (defined($slot->{'allowedusers'})
  798: 	&& grep(/^\Q$env{'user.name'}:$env{'user.domain'}\E$/,
  799: 		split(',',$slot->{'allowedusers'}))) {
  800: 	$userallowed=1;
  801:     }
  802: 
  803:     if (!defined($slot->{'allowedusers'})
  804: 	&& !defined($slot->{'allowedsections'})) {
  805: 	$userallowed=1;
  806:     }
  807: 
  808:     &Apache::lonxml::debug("$slot_name user is $userallowed");
  809:     return 0 if (!$userallowed);
  810: 
  811:     # not allowed for this resource
  812:     if (defined($slot->{'symb'})
  813: 	&& $slot->{'symb'} ne $symb) {
  814: 	return 0;
  815:     }
  816: 
  817:     my $conflict = &check_for_conflict($symb,$slot_name,$slot,$slots,
  818: 				       $consumed_uniqueperiods);
  819:     if ($conflict =~ /^error: /) {
  820:         return 0;
  821:     } elsif ($conflict ne '') {
  822: 	if ($slots->{$conflict}{'starttime'} < time) {
  823: 	    return 0;
  824: 	}
  825:     }
  826:     &Apache::lonxml::debug("$slot_name symb good");
  827:     return 1;
  828: }
  829: 
  830: sub get_description {
  831:     my ($slot_name,$slot)=@_;
  832:     my $description=$slot->{'description'};
  833:     if (!defined($description)) {
  834: 	$description=&mt('[_1] From [_2] to [_3]',$slot_name,
  835: 			 &Apache::lonlocal::locallocaltime($slot->{'starttime'}),
  836: 			 &Apache::lonlocal::locallocaltime($slot->{'endtime'}));
  837:     }
  838:     return $description;
  839: }
  840: 
  841: sub show_choices {
  842:     my ($r,$symb,$formname)=@_;
  843: 
  844:     my ($cnum,$cdom)=&get_course();
  845:     my %slots = &Apache::lonnet::get_course_slots($cnum,$cdom);
  846:     my $consumed_uniqueperiods = &get_consumed_uniqueperiods(\%slots);
  847:     if (ref($consumed_uniqueperiods) eq 'HASH') {
  848:         if (&Apache::lonnet::error(%$consumed_uniqueperiods)) {
  849:             $r->print('<span class="LC_error">'.
  850:                       &mt('An error occurred determining slot availability').
  851:                       '</span>');
  852:             return;
  853:         }
  854:     } elsif ($consumed_uniqueperiods =~ /^error: /) {
  855:         $r->print('<span class="LC_error">'.
  856:                   &mt('An error occurred determining slot availability').
  857:                   '</span>');
  858:         return;
  859:     }
  860:     my (@available,$output);
  861:     &Apache::lonxml::debug("Checking Slots");
  862:     my @got_slots=&check_for_reservation($symb,'allslots');
  863:     if ($got_slots[0] =~ /^error: /) {
  864:         $r->print('<span class="LC_error">'.
  865:                   &mt('An error occurred determining slot availability').
  866:                   '</span>');
  867:         return;
  868:     }
  869:     foreach my $slot (sort 
  870: 		      { return $slots{$a}->{'starttime'} <=> $slots{$b}->{'starttime'} }
  871: 		      (keys(%slots)))  {
  872: 
  873: 	&Apache::lonxml::debug("Checking Slot $slot");
  874: 	next if (!&allowed_slot($slot,$slots{$slot},$symb,\%slots,
  875: 				$consumed_uniqueperiods));
  876: 
  877:         push(@available,$slot);
  878:     }
  879:     if (!@available) {
  880:         $output = &mt('No available times.');
  881:         if ($env{'form.command'} ne 'manageresv') {
  882:             $output .= ' <a href="/adm/flip?postdata=return:">'.
  883:                        &mt('Return to last resource').'</a>';
  884:         }
  885:         $r->print($output);
  886:         return;
  887:     }
  888:     if ($env{'form.command'} eq 'manageresv') {
  889:         $output = '<table border="0">';
  890:     } else {
  891:         $output = &Apache::loncommon::start_data_table();
  892:     }
  893:     foreach my $slot (@available) { 
  894: 	my $description=&get_description($slot,$slots{$slot});
  895: 	my $form;
  896: 	if ((grep(/^\Q$slot\E$/,@got_slots)) ||
  897: 	    &space_available($slot,$slots{$slot},$symb)) {
  898: 	    my $text=&mt('Select');
  899: 	    my $command='get';
  900: 	    if (grep(/^\Q$slot\E$/,@got_slots)) {
  901: 		$text=&mt('Drop Reservation');
  902: 		$command='release';
  903: 	    } else {
  904: 		my $conflict = &check_for_conflict($symb,$slot,$slots{$slot},
  905: 						   \%slots,
  906: 						   $consumed_uniqueperiods);
  907:                 if ($conflict) {
  908:                     if ($conflict =~ /^error: /) {
  909:                         $form = '<span class="LC_error">'.
  910:                                 &mt('Slot: [_1] has unknown status.',$description).
  911:                                 '</span>';
  912:                     } else {
  913: 		        $text=&mt('Change Reservation');
  914: 		        $command='get';
  915: 		    }
  916:                 }
  917: 	    }
  918: 	    my $escsymb=&escape($symb);
  919:             if (!$form) {
  920:                 if ($formname) {
  921:                     $formname = 'name="'.$formname.'" ';
  922:                 }
  923:                 my $context = 'user';
  924:                 if ($env{'form.command'} eq 'manageresv') {
  925:                     $context = 'usermanage';
  926:                 }
  927: 	        $form=<<STUFF;
  928:    <form method="post" action="/adm/slotrequest" $formname>
  929:      <input type="submit" name="Select" value="$text" />
  930:      <input type="hidden" name="symb" value="$escsymb" />
  931:      <input type="hidden" name="slotname" value="$slot" />
  932:      <input type="hidden" name="command" value="$command" />
  933:      <input type="hidden" name="context" value="$context" />
  934:    </form>
  935: STUFF
  936: 	    }
  937:         } else {
  938:             $form = &mt('Unavailable');
  939:         }
  940:         if ($env{'form.command'} eq 'manageresv') {
  941:             $output .= '<tr>';
  942:         } else {
  943: 	    $output .= &Apache::loncommon::start_data_table_row();
  944:         }
  945:         $output .= " 
  946:  <td>$form</td>
  947:  <td>$description</td>\n";
  948:         if ($env{'form.command'} eq 'manageresv') {
  949:             $output .= '</tr>';
  950:         } else {
  951:             $output .= &Apache::loncommon::end_data_table_row();
  952:         }
  953:     }
  954:     if ($env{'form.command'} eq 'manageresv') {
  955:         $output .= '</table>';
  956:     } else {
  957:        $output .= &Apache::loncommon::end_data_table();
  958:     }
  959:     $r->print($output);
  960: }
  961: 
  962: sub to_show {
  963:     my ($slotname,$slot,$when,$deleted,$name) = @_;
  964:     my $time=time;
  965:     my $week=60*60*24*7;
  966: 
  967:     if ($deleted eq 'hide' && $slot->{'type'} eq 'deleted') {
  968: 	return 0;
  969:     }
  970: 
  971:     if ($name && $name->{'value'} =~ /\w/) {
  972: 	if ($name->{'type'} eq 'substring') {
  973: 	    if ($slotname !~ /\Q$name->{'value'}\E/) {
  974: 		return 0;
  975: 	    }
  976: 	}
  977: 	if ($name->{'type'} eq 'exact') {
  978: 	    if ($slotname eq $name->{'value'}) {
  979: 		return 0;
  980: 	    }
  981: 	}
  982:     }
  983: 
  984:     if ($when eq 'any') {
  985: 	return 1;
  986:     } elsif ($when eq 'now') {
  987: 	if ($time > $slot->{'starttime'} &&
  988: 	    $time < $slot->{'endtime'}) {
  989: 	    return 1;
  990: 	}
  991: 	return 0;
  992:     } elsif ($when eq 'nextweek') {
  993: 	if ( ($time        < $slot->{'starttime'} &&
  994: 	      ($time+$week) > $slot->{'starttime'})
  995: 	     ||
  996: 	     ($time        < $slot->{'endtime'} &&
  997: 	      ($time+$week) > $slot->{'endtime'}) ) {
  998: 	    return 1;
  999: 	}
 1000: 	return 0;
 1001:     } elsif ($when eq 'lastweek') {
 1002: 	if ( ($time        > $slot->{'starttime'} &&
 1003: 	      ($time-$week) < $slot->{'starttime'})
 1004: 	     ||
 1005: 	     ($time        > $slot->{'endtime'} &&
 1006: 	      ($time-$week) < $slot->{'endtime'}) ) {
 1007: 	    return 1;
 1008: 	}
 1009: 	return 0;
 1010:     } elsif ($when eq 'willopen') {
 1011: 	if ($time < $slot->{'starttime'}) {
 1012: 	    return 1;
 1013: 	}
 1014: 	return 0;
 1015:     } elsif ($when eq 'wereopen') {
 1016: 	if ($time > $slot->{'endtime'}) {
 1017: 	    return 1;
 1018: 	}
 1019: 	return 0;
 1020:     }
 1021:     
 1022:     return 1;
 1023: }
 1024: 
 1025: sub remove_link {
 1026:     my ($slotname,$entry,$uname,$udom,$symb) = @_;
 1027: 
 1028:     my $remove = &mt('Remove');
 1029: 
 1030:     if ($entry eq 'remove all') {
 1031: 	$remove = &mt('Remove All');
 1032: 	undef($uname);
 1033: 	undef($udom);
 1034:     }
 1035: 
 1036:     $slotname  = &escape($slotname);
 1037:     $entry     = &escape($entry);
 1038:     $uname     = &escape($uname);
 1039:     $udom      = &escape($udom);
 1040:     $symb      = &escape($symb);
 1041: 
 1042:     return <<"END_LINK";
 1043:  <a href="/adm/slotrequest?command=remove_registration&amp;slotname=$slotname&amp;entry=$entry&amp;uname=$uname&amp;udom=$udom&amp;symb=$symb&amp;context=manage"
 1044:    >($remove)</a>
 1045: END_LINK
 1046: 
 1047: }
 1048: 
 1049: sub show_table {
 1050:     my ($r,$mgr)=@_;
 1051: 
 1052:     my ($cnum,$cdom)=&get_course();
 1053:     my $crstype=&Apache::loncommon::course_type($cdom.'_'.$cnum);
 1054:     my %slots=&Apache::lonnet::dump('slots',$cdom,$cnum);
 1055:     if ( (keys(%slots))[0] =~ /^error: 2 /) {
 1056: 	undef(%slots);
 1057:     } 
 1058:     my $available;
 1059:     if ($mgr eq 'F') {
 1060:     # FIXME: This line should be deleted once Slots uses breadcrumbs
 1061:     $r->print(&Apache::loncommon::help_open_topic('Slot About', 'Help on slots'));
 1062: 
 1063: 	$r->print('<div>');
 1064: 	$r->print('<form method="post" action="/adm/slotrequest">
 1065: <input type="hidden" name="command" value="uploadstart" />
 1066: <input type="submit" name="start" value="'.&mt('Upload Slot List').'" />
 1067: </form>');
 1068: 	$r->print(&Apache::loncommon::help_open_topic('Slot CommaDelimited'));
 1069: 	$r->print('<form method="post" action="/adm/helper/newslot.helper">
 1070: <input type="submit" name="newslot" value="'.&mt('Create a New Slot').'" />
 1071: </form>');
 1072: 	$r->print(&Apache::loncommon::help_open_topic('Slot AddInterface'));
 1073: 	$r->print('</div>');
 1074:     }
 1075: 
 1076:     if (!keys(%slots)) {
 1077:         if ($crstype eq 'Community') {
 1078:             $r->print('<div>'.&mt('No slots have been created in this community.').'</div>');
 1079:         } else {
 1080:             $r->print('<div>'.&mt('No slots have been created in this course.').'</div>');
 1081:         }
 1082:         return;
 1083:     }
 1084:     
 1085:     my %Saveable_Parameters = ('show'              => 'array',
 1086: 			       'when'              => 'scalar',
 1087: 			       'order'             => 'scalar',
 1088: 			       'deleted'           => 'scalar',
 1089: 			       'name_filter_type'  => 'scalar',
 1090: 			       'name_filter_value' => 'scalar',
 1091: 			       );
 1092:     &Apache::loncommon::store_course_settings('slotrequest',
 1093: 					      \%Saveable_Parameters);
 1094:     &Apache::loncommon::restore_course_settings('slotrequest',
 1095: 						\%Saveable_Parameters);
 1096:     &Apache::grades::init_perm();
 1097:     my ($classlist,$section,$fullname)=&Apache::grades::getclasslist('all');
 1098:     &Apache::grades::reset_perm();
 1099: 
 1100:     # what to display filtering
 1101:     my %show_fields=&Apache::lonlocal::texthash(
 1102: 	     'name'            => 'Slot Name',
 1103: 	     'description'     => 'Description',
 1104: 	     'type'            => 'Type',
 1105: 	     'starttime'       => 'Start time',
 1106: 	     'endtime'         => 'End Time',
 1107:              'startreserve'    => 'Time students can start reserving',
 1108:              'endreserve'      => 'Time students can no longer reserve',
 1109:              'reservationmsg'  => 'Message triggered by reservation',
 1110: 	     'secret'          => 'Secret Word',
 1111: 	     'space'           => '# of students/max',
 1112: 	     'ip'              => 'IP or DNS restrictions',
 1113: 	     'symb'            => 'Resource slot is restricted to.',
 1114: 	     'allowedsections' => 'Sections slot is restricted to.',
 1115: 	     'allowedusers'    => 'Users slot is restricted to.',
 1116: 	     'uniqueperiod'    => 'Period of time slot is unique',
 1117: 	     'scheduled'       => 'Scheduled Students',
 1118: 	     'proctor'         => 'List of proctors');
 1119:     if ($crstype eq 'Community') {
 1120:         $show_fields{'startreserve'} = &mt('Time members can start reserving');
 1121:         $show_fields{'endreserve'} = &mt('Time members can no longer reserve');
 1122:         $show_fields{'scheduled'} = &mt('Scheduled Members');
 1123:     }
 1124:     my @show_order=('name','description','type','starttime','endtime',
 1125: 		    'startreserve','endreserve','reservationmsg','secret','space',
 1126: 		    'ip','symb','allowedsections','allowedusers','uniqueperiod',
 1127: 		    'scheduled','proctor');
 1128:     my @show = 
 1129: 	(exists($env{'form.show'})) ? &Apache::loncommon::get_env_multiple('form.show')
 1130: 	                            : keys(%show_fields);
 1131:     my %show =  map { $_ => 1 } (@show);
 1132: 
 1133:     #when filtering setup
 1134:     my %when_fields=&Apache::lonlocal::texthash(
 1135: 	     'now'      => 'Open now',
 1136: 	     'nextweek' => 'Open within the next week',
 1137: 	     'lastweek' => 'Were open last week',
 1138: 	     'willopen' => 'Will open later',
 1139: 	     'wereopen' => 'Were open',
 1140: 	     'any'      => 'Anytime',
 1141: 						);
 1142:     my @when_order=('any','now','nextweek','lastweek','willopen','wereopen');
 1143:     $when_fields{'select_form_order'} = \@when_order;
 1144:     my $when = 	(exists($env{'form.when'})) ? $env{'form.when'}
 1145:                                             : 'now';
 1146: 
 1147:     #display of students setup
 1148:     my %stu_display_fields=
 1149: 	&Apache::lonlocal::texthash('username' => 'User name',
 1150: 				    'fullname' => 'Full name',
 1151: 				    );
 1152:     my @stu_display_order=('fullname','username');
 1153:     my @stu_display = 
 1154: 	(exists($env{'form.studisplay'})) ? &Apache::loncommon::get_env_multiple('form.studisplay')
 1155: 	                                  : keys(%stu_display_fields);
 1156:     my %stu_display =  map { $_ => 1 } (@stu_display);
 1157: 
 1158:     #name filtering setup
 1159:     my %name_filter_type_fields=
 1160: 	&Apache::lonlocal::texthash('substring' => 'Substring',
 1161: 				    'exact'     => 'Exact',
 1162: 				    #'reg'       => 'Regular Expression',
 1163: 				    );
 1164:     my @name_filter_type_order=('substring','exact');
 1165: 
 1166:     $name_filter_type_fields{'select_form_order'} = \@name_filter_type_order;
 1167:     my $name_filter_type = 
 1168: 	(exists($env{'form.name_filter_type'})) ? $env{'form.name_filter_type'}
 1169:                                                 : 'substring';
 1170:     my $name_filter = {'type'  => $name_filter_type,
 1171: 		       'value' => $env{'form.name_filter_value'},};
 1172: 
 1173:     
 1174:     #deleted slot filtering
 1175:     #default to hide if no value
 1176:     $env{'form.deleted'} ||= 'hide';
 1177:     my $hide_radio = 
 1178: 	&Apache::lonhtmlcommon::radio('deleted',$env{'form.deleted'},'hide');
 1179:     my $show_radio = 
 1180: 	&Apache::lonhtmlcommon::radio('deleted',$env{'form.deleted'},'show');
 1181: 	
 1182:     $r->print('<form method="post" action="/adm/slotrequest">
 1183: <input type="hidden" name="command" value="showslots" />');
 1184:     $r->print('<div>');
 1185:     $r->print('<table class="inline">
 1186:       <tr><th>'.&mt('Show').'</th>
 1187:           <th>'.&mt('Student Display').'</th>
 1188:           <th>'.&mt('Open').'</th>
 1189:           <th>'.&mt('Slot Name Filter').'</th>
 1190:           <th>'.&mt('Options').'</th>
 1191:       </tr>
 1192:       <tr><td valign="top">'.&Apache::loncommon::multiple_select_form('show',\@show,6,\%show_fields,\@show_order).
 1193: 	      '</td>
 1194:            <td valign="top">
 1195:          '.&Apache::loncommon::multiple_select_form('studisplay',\@stu_display,
 1196: 						    6,\%stu_display_fields,
 1197: 						    \@stu_display_order).'
 1198:            </td>
 1199:            <td valign="top">'.&Apache::loncommon::select_form($when,'when',\%when_fields).
 1200:           '</td>
 1201:            <td valign="top">'.&Apache::loncommon::select_form($name_filter_type,
 1202: 						 'name_filter_type',
 1203: 						 \%name_filter_type_fields).
 1204: 	      '<br />'.
 1205: 	      &Apache::lonhtmlcommon::textbox('name_filter_value',
 1206: 					      $env{'form.name_filter_value'},
 1207: 					      15).
 1208:           '</td>
 1209:            <td valign="top">
 1210:             <table>
 1211:               <tr>
 1212:                 <td rowspan="2">Deleted slots:</td>
 1213:                 <td><label>'.$show_radio.'Show</label></td>
 1214:               </tr>
 1215:               <tr>
 1216:                 <td><label>'.$hide_radio.'Hide</label></td>
 1217:               </tr>
 1218:             </table>
 1219: 	  </td>
 1220:        </tr>
 1221:     </table>');
 1222:     $r->print('</div>');
 1223:     $r->print('<p><input type="submit" name="start" value="'.&mt('Update Display').'" /></p>');
 1224:     my $linkstart='<a href="/adm/slotrequest?command=showslots&amp;order=';
 1225:     $r->print(&Apache::loncommon::start_data_table().
 1226: 	      &Apache::loncommon::start_data_table_header_row().'
 1227: 	       <th></th>');
 1228:     foreach my $which (@show_order) {
 1229: 	if ($which ne 'proctor' && exists($show{$which})) {
 1230: 	    $r->print('<th>'.$linkstart.$which.'">'.$show_fields{$which}.'</a></th>');
 1231: 	}
 1232:     }
 1233:     $r->print(&Apache::loncommon::end_data_table_header_row());
 1234: 
 1235:     my %name_cache;
 1236:     my $slotsort = sub {
 1237: 	if ($env{'form.order'}=~/^(type|description|endtime|startreserve|endreserve|ip|symb|allowedsections|allowedusers|reservationmsg)$/) {
 1238: 	    if (lc($slots{$a}->{$env{'form.order'}})
 1239: 		ne lc($slots{$b}->{$env{'form.order'}})) {
 1240: 		return (lc($slots{$a}->{$env{'form.order'}}) 
 1241: 			cmp lc($slots{$b}->{$env{'form.order'}}));
 1242: 	    }
 1243: 	} elsif ($env{'form.order'} eq 'space') {
 1244: 	    if ($slots{$a}{'maxspace'} ne $slots{$b}{'maxspace'}) {
 1245: 		return ($slots{$a}{'maxspace'} cmp $slots{$b}{'maxspace'});
 1246: 	    }
 1247: 	} elsif ($env{'form.order'} eq 'name') {
 1248: 	    if (lc($a) cmp lc($b)) {
 1249: 		return lc($a) cmp lc($b);
 1250: 	    }
 1251: 	} elsif ($env{'form.order'} eq 'uniqueperiod') {
 1252: 	    
 1253: 	    if ($slots{$a}->{'uniqueperiod'}[0] 
 1254: 		ne $slots{$b}->{'uniqueperiod'}[0]) {
 1255: 		return ($slots{$a}->{'uniqueperiod'}[0]
 1256: 			cmp $slots{$b}->{'uniqueperiod'}[0]);
 1257: 	    }
 1258: 	    if ($slots{$a}->{'uniqueperiod'}[1] 
 1259: 		ne $slots{$b}->{'uniqueperiod'}[1]) {
 1260: 		return ($slots{$a}->{'uniqueperiod'}[1]
 1261: 			cmp $slots{$b}->{'uniqueperiod'}[1]);
 1262: 	    }
 1263: 	}
 1264: 	return $slots{$a}->{'starttime'} <=> $slots{$b}->{'starttime'};
 1265:     };
 1266: 
 1267:     my %consumed;
 1268:     if (exists($show{'scheduled'}) || exists($show{'space'}) ) {
 1269: 	%consumed=&Apache::lonnet::dump('slot_reservations',$cdom,$cnum);
 1270: 	my ($tmp)=%consumed;
 1271: 	if ($tmp =~ /^error: /) { undef(%consumed); }
 1272:     }
 1273: 
 1274:     my %msgops = &slot_reservationmsg_options();
 1275: 
 1276:     foreach my $slot (sort $slotsort (keys(%slots)))  {
 1277: 	if (!&to_show($slot,$slots{$slot},$when,
 1278: 		      $env{'form.deleted'},$name_filter)) { next; }
 1279:         my $reservemsg;
 1280: 	if (defined($slots{$slot}->{'type'})
 1281: 	    && $slots{$slot}->{'type'} eq 'schedulable_student') {
 1282: 	    $reservemsg = $msgops{$slots{$slot}->{'reservationmsg'}};
 1283: 	}
 1284: 	my $description=&get_description($slot,$slots{$slot});
 1285: 	my ($id_count,$ids);
 1286: 	    
 1287: 	if (exists($show{'scheduled'}) || exists($show{'space'}) ) {
 1288: 	    my $re_str = "$slot\0";
 1289: 	    my @this_slot = grep(/^\Q$re_str\E/,keys(%consumed));
 1290: 	    $id_count = scalar(@this_slot);
 1291: 	    if (exists($show{'scheduled'})) {
 1292: 		foreach my $entry (sort { $consumed{$a}{name} cmp 
 1293: 					      $consumed{$b}{name} }
 1294: 				   (@this_slot)) {
 1295: 		    my (undef,$id)=split("\0",$entry);
 1296: 		    my ($uname,$udom) = split(':',$consumed{$entry}{'name'});
 1297: 		    $ids.= '<span class="LC_nobreak">';
 1298: 		    foreach my $item (@stu_display_order) {
 1299: 			if ($stu_display{$item}) {
 1300: 			    if ($item eq 'fullname') {
 1301: 				$ids.=$fullname->{"$uname:$udom"}.' ';
 1302: 			    } elsif ($item eq 'username') {
 1303: 				$ids.="<tt>$uname:$udom</tt> ";
 1304: 			    }
 1305: 			}
 1306: 		    }
 1307: 		    $ids.=&remove_link($slot,$entry,$uname,$udom,
 1308: 				       $consumed{$entry}{'symb'}).'</span><br />';
 1309: 		}
 1310: 	    }
 1311: 	}
 1312: 
 1313: 	my $start=($slots{$slot}->{'starttime'}?
 1314: 		   &Apache::lonlocal::locallocaltime($slots{$slot}->{'starttime'}):'');
 1315: 	my $end=($slots{$slot}->{'endtime'}?
 1316: 		 &Apache::lonlocal::locallocaltime($slots{$slot}->{'endtime'}):'');
 1317: 	my $start_reserve=($slots{$slot}->{'startreserve'}?
 1318: 			   &Apache::lonlocal::locallocaltime($slots{$slot}->{'startreserve'}):'');
 1319:         my $end_reserve=($slots{$slot}->{'endreserve'}?
 1320:                          &Apache::lonlocal::locallocaltime($slots{$slot}->{'endreserve'}):'');
 1321: 	
 1322: 	my $unique;
 1323: 	if (ref($slots{$slot}{'uniqueperiod'})) {
 1324: 	    $unique=localtime($slots{$slot}{'uniqueperiod'}[0]).', '.
 1325: 		localtime($slots{$slot}{'uniqueperiod'}[1]);
 1326: 	}
 1327: 
 1328: 	my $title;
 1329: 	if (exists($slots{$slot}{'symb'})) {
 1330: 	    my (undef,undef,$res)=
 1331: 		&Apache::lonnet::decode_symb($slots{$slot}{'symb'});
 1332: 	    $res =   &Apache::lonnet::clutter($res);
 1333: 	    $title = &Apache::lonnet::gettitle($slots{$slot}{'symb'});
 1334: 	    $title='<a href="'.$res.'?symb='.$slots{$slot}{'symb'}.'">'.$title.'</a>';
 1335: 	}
 1336: 
 1337: 	my $allowedsections;
 1338: 	if (exists($show{'allowedsections'})) {
 1339: 	    $allowedsections = 
 1340: 		join(', ',sort(split(/\s*,\s*/,
 1341: 				     $slots{$slot}->{'allowedsections'})));
 1342: 	}
 1343: 
 1344: 	my @allowedusers;
 1345: 	if (exists($show{'allowedusers'})) {
 1346: 	    @allowedusers= map {
 1347: 		my ($uname,$udom)=split(/:/,$_);
 1348: 		my $fullname=$name_cache{$_};
 1349: 		if (!defined($fullname)) {
 1350: 		    $fullname = &Apache::loncommon::plainname($uname,$udom);
 1351: 		    $fullname =~s/\s/&nbsp;/g;
 1352: 		    $name_cache{$_} = $fullname;
 1353: 		}
 1354: 		&Apache::loncommon::aboutmewrapper($fullname,$uname,$udom);
 1355: 	    } (sort(split(/\s*,\s*/,$slots{$slot}->{'allowedusers'})));
 1356: 	}
 1357: 	my $allowedusers=join(', ',@allowedusers);
 1358: 	
 1359: 	my @proctors;
 1360: 	my $rowspan=1;
 1361: 	my $colspan=1;
 1362: 	if (exists($show{'proctor'})) {
 1363: 	    $rowspan=2;
 1364: 	    @proctors= map {
 1365: 		my ($uname,$udom)=split(/:/,$_);
 1366: 		my $fullname=$name_cache{$_};
 1367: 		if (!defined($fullname)) {
 1368: 		    $fullname = &Apache::loncommon::plainname($uname,$udom);
 1369: 		    $fullname =~s/\s/&nbsp;/g;
 1370: 		    $name_cache{$_} = $fullname;
 1371: 		}
 1372: 		&Apache::loncommon::aboutmewrapper($fullname,$uname,$udom);
 1373: 	    } (sort(split(/\s*,\s*/,$slots{$slot}->{'proctor'})));
 1374: 	}
 1375: 	my $proctors=join(', ',@proctors);
 1376: 
 1377:         my %lt = &Apache::lonlocal::texthash (
 1378:                                                edit   => 'Edit',
 1379:                                                delete => 'Delete',
 1380:                                                slotlog => 'History',
 1381:         );
 1382: 	my $edit=(<<"EDITLINK");
 1383: <a href="/adm/helper/newslot.helper?name=$slot">$lt{'edit'}</a>
 1384: EDITLINK
 1385: 
 1386: 	my $delete=(<<"DELETELINK");
 1387: <a href="/adm/slotrequest?command=delete&amp;slotname=$slot">$lt{'delete'}</a>
 1388: DELETELINK
 1389: 
 1390:         my $showlog=(<<"LOGLINK");
 1391: <a href="/adm/slotrequest?command=slotlog&amp;slotname=$slot">$lt{'slotlog'}</a>
 1392: LOGLINK
 1393: 
 1394:         my $remove_all=&remove_link($slot,'remove all').'<br />';
 1395: 
 1396:         if ($ids eq '') {
 1397:             undef($remove_all);
 1398:         } else {
 1399:             undef($delete);
 1400:         }
 1401: 	if ($slots{$slot}{'type'} ne 'schedulable_student') {
 1402:             undef($showlog); 
 1403: 	    undef($remove_all);
 1404: 	}
 1405: 
 1406: 	my $row_start=&Apache::loncommon::start_data_table_row();
 1407: 	my $row_end=&Apache::loncommon::end_data_table_row();
 1408:         $r->print($row_start.
 1409: 		  "\n<td rowspan=\"$rowspan\">$edit $delete $showlog</td>\n");
 1410: 	if (exists($show{'name'})) {
 1411: 	    $colspan++;$r->print("<td>$slot</td>");
 1412: 	}
 1413: 	if (exists($show{'description'})) {
 1414: 	    $colspan++;$r->print("<td>$description</td>\n");
 1415: 	}
 1416: 	if (exists($show{'type'})) {
 1417: 	    $colspan++;$r->print("<td>$slots{$slot}->{'type'}</td>\n");
 1418: 	}
 1419: 	if (exists($show{'starttime'})) {
 1420: 	    $colspan++;$r->print("<td>$start</td>\n");
 1421: 	}
 1422: 	if (exists($show{'endtime'})) {
 1423: 	    $colspan++;$r->print("<td>$end</td>\n");
 1424: 	}
 1425: 	if (exists($show{'startreserve'})) {
 1426: 	    $colspan++;$r->print("<td>$start_reserve</td>\n");
 1427: 	}
 1428:         if (exists($show{'endreserve'})) {
 1429:             $colspan++;$r->print("<td>$end_reserve</td>\n");
 1430:         }
 1431:         if (exists($show{'reservationmsg'})) {
 1432:             $colspan++;$r->print("<td>$reservemsg</td>\n");
 1433:         }
 1434: 	if (exists($show{'secret'})) {
 1435: 	    $colspan++;$r->print("<td>$slots{$slot}{'secret'}</td>\n");
 1436: 	}
 1437: 	if (exists($show{'space'})) {
 1438: 	    my $display = $id_count;
 1439: 	    if ($slots{$slot}{'maxspace'}>0) {
 1440: 		$display.='/'.$slots{$slot}{'maxspace'};
 1441: 		if ($slots{$slot}{'maxspace'} <= $id_count) {
 1442: 		    $display = '<strong>'.$display.' (full) </strong>';
 1443: 		}
 1444: 	    }
 1445: 	    $colspan++;$r->print("<td>$display</td>\n");
 1446: 	}
 1447: 	if (exists($show{'ip'})) {
 1448: 	    $colspan++;$r->print("<td>$slots{$slot}{'ip'}</td>\n");
 1449: 	}
 1450: 	if (exists($show{'symb'})) {
 1451: 	    $colspan++;$r->print("<td>$title</td>\n");
 1452: 	}
 1453: 	if (exists($show{'allowedsections'})) {
 1454: 	    $colspan++;$r->print("<td>$allowedsections</td>\n");
 1455: 	}
 1456: 	if (exists($show{'allowedusers'})) {
 1457: 	    $colspan++;$r->print("<td>$allowedusers</td>\n");
 1458: 	}
 1459: 	if (exists($show{'uniqueperiod'})) {
 1460: 	    $colspan++;$r->print("<td>$unique</td>\n");
 1461: 	}
 1462: 	if (exists($show{'scheduled'})) {
 1463: 	    $colspan++;$r->print("<td>$remove_all $ids</td>\n");
 1464: 	}
 1465: 	$r->print("$row_end\n");
 1466: 	if (exists($show{'proctor'})) {
 1467: 	    $r->print(<<STUFF);
 1468: $row_start
 1469:  <td colspan="$colspan">$proctors</td>
 1470: $row_end
 1471: STUFF
 1472:         }
 1473:     }
 1474:     $r->print(&Apache::loncommon::end_data_table().'</form>');
 1475:     return;
 1476: }
 1477: 
 1478: sub manage_reservations {
 1479:     my ($r,$crstype) = @_;
 1480:     my $navmap = Apache::lonnavmaps::navmap->new();
 1481:     $r->print('<p>'
 1482:              .&mt('Instructors may use a reservation system to place restrictions on when and where assignments can be worked on.')
 1483:              .'<br />'
 1484:              .&mt('One example is for management of laboratory space, which is only available at certain times, and has a limited number of seats.')
 1485:              .'</p>'
 1486:     );
 1487:     if (!defined($navmap)) {
 1488:         $r->print('<div class="LC_error">');
 1489:         if ($crstype eq 'Community') {
 1490:             $r->print(&mt('Unable to retrieve information about community contents'));
 1491:         } else {
 1492:             $r->print(&mt('Unable to retrieve information about course contents'));
 1493:         }
 1494:         $r->print('</div>');
 1495:         &Apache::lonnet::logthis('Manage Reservations - could not create navmap object in '.lc($crstype).':'.$env{'request.course.id'});
 1496:         return;
 1497:     }
 1498:     my (%parent,%shownparent,%container,%container_title,%contents);
 1499:     my ($depth,$count,$reservable,$lastcontainer,$rownum) = (0,0,0,0,0);
 1500:     my @backgrounds = ("LC_odd_row","LC_even_row");
 1501:     my $numcolors = scalar(@backgrounds);
 1502:     my $location=&Apache::loncommon::lonhttpdurl("/adm/lonIcons/whitespace_21.gif");
 1503:     my $slotheader = '<p>'.
 1504:                  &mt('Your reservation status for any such assignments is listed below:').
 1505:                  '</p>'.
 1506:                  '<table class="LC_data_table LC_tableOfContent">'."\n";
 1507:     my $shownheader = 0;
 1508:     my $it=$navmap->getIterator(undef,undef,undef,1,undef,undef);
 1509:     while (my $resource = $it->next()) {
 1510:         if ($resource == $it->BEGIN_MAP()) {
 1511:             $depth++;
 1512:             $parent{$depth} = $lastcontainer;
 1513:         }
 1514:         if ($resource == $it->END_MAP()) {
 1515:             $depth--;
 1516:             $lastcontainer = $parent{$depth};
 1517:         }
 1518:         if (ref($resource)) {
 1519:             my $symb = $resource->symb();
 1520:             my $ressymb = $symb;
 1521:             $contents{$lastcontainer} ++;
 1522:             next if (!$resource->is_problem() && !$resource->is_sequence() && 
 1523:                      !$resource->is_page());
 1524:             $count ++;
 1525:             if (($resource->is_sequence()) || ($resource->is_page())) {
 1526:                 $lastcontainer = $count;
 1527:                 $container{$lastcontainer} = $resource;
 1528:                 $container_title{$lastcontainer} = $resource->compTitle();
 1529:             }
 1530:             if ($resource->is_problem()) {
 1531:                 my ($useslots) = $resource->slot_control();
 1532:                 next if (($useslots eq '') || ($useslots =~ /^\s*no\s*$/i));
 1533:                 my ($msg,$get_choices,$slotdescription);
 1534:                 my $title = $resource->compTitle();
 1535:                 my $status = $resource->simpleStatus('0');
 1536:                 my ($slot_status,$date,$slot_name) = $resource->check_for_slot('0');
 1537:                 if ($slot_name ne '') {
 1538:                     my %slot=&Apache::lonnet::get_slot($slot_name);
 1539:                     $slotdescription=&get_description($slot_name,\%slot);
 1540:                 }
 1541:                 if ($slot_status == $resource->NOT_IN_A_SLOT) {
 1542:                     $msg=&mt('No current reservation.');
 1543:                     $get_choices = 1;
 1544:                 } elsif ($slot_status == $resource->NEEDS_CHECKIN) {
 1545:                     $msg='<span class="LC_nobreak">'.&mt('Reserved:').
 1546:                          '&nbsp;'.$slotdescription.'</span><br />'.
 1547:                          &mt('Access requires proctor validation.');
 1548:                 } elsif ($slot_status == $resource->WAITING_FOR_GRADE) {
 1549:                     $msg=&mt('Submitted and currently in grading queue.');
 1550:                 } elsif ($slot_status == $resource->CORRECT) {
 1551:                     $msg=&mt('Problem is unavailable.');
 1552:                 } elsif ($slot_status == $resource->RESERVED) {
 1553:                     $msg='<span class="LC_nobreak">'.&mt('Reserved:').
 1554:                          '&nbsp;'.$slotdescription.'</span><br />'.
 1555:                          &mt('Problem is currently available.');
 1556:                 } elsif ($slot_status == $resource->RESERVED_LOCATION) {
 1557:                     $msg='<span class="LC_nobreak">'.&mt('Reserved:').
 1558:                          '&nbsp;'.$slotdescription.'</span><br />'.
 1559:                          &mt('Problem is available at a different location.');
 1560:                     $get_choices = 1;
 1561:                 } elsif ($slot_status == $resource->RESERVED_LATER) {
 1562:                     $msg='<span class="LC_nobreak">'.&mt('Reserved:').
 1563:                          '&nbsp;'.$slotdescription.'</span><br />'.
 1564:                          &mt('Problem will be available later.');
 1565:                     $get_choices = 1;
 1566:                 } elsif ($slot_status == $resource->RESERVABLE) {
 1567:                     $msg=&mt('Reservation needed');
 1568:                     $get_choices = 1;
 1569:                 } elsif ($slot_status == $resource->RESERVABLE_LATER) {
 1570:                     $msg=&mt('Reservation needed: will be reservable later.');
 1571:                 } elsif ($slot_status == $resource->NOTRESERVABLE) {
 1572:                     $msg=&mt('Reservation needed: none available.');
 1573:                 } elsif ($slot_status == $resource->UNKNOWN) {
 1574:                     $msg=&mt('Unable to determine status due to network problems.');
 1575:                 } else {
 1576:                     if ($status != $resource->OPEN) {
 1577:                         $msg = &Apache::lonnavmaps::getDescription($resource,'0'); 
 1578:                     }
 1579:                 }
 1580:                 $reservable ++;
 1581:                 my $treelevel = $depth;
 1582:                 my $higherup = $lastcontainer;
 1583:                 if ($depth > 1) {
 1584:                     my @maprows;
 1585:                     while ($treelevel > 1) {
 1586:                         if (ref($container{$higherup})) {
 1587:                             my $res = $container{$higherup};
 1588:                             last if (defined($shownparent{$higherup}));
 1589:                             my $maptitle = $res->compTitle();
 1590:                             my $type = 'sequence';
 1591:                             if ($res->is_page()) {
 1592:                                 $type = 'page';
 1593:                             }
 1594:                             &show_map_row($treelevel,$location,$type,$maptitle,
 1595:                                           \@maprows);
 1596:                             $shownparent{$higherup} = 1;
 1597:                         }
 1598:                         $treelevel --;
 1599:                         $higherup = $parent{$treelevel};
 1600:                     }
 1601:                     foreach my $item (@maprows) {
 1602:                         $rownum ++;
 1603:                         my $bgcolor = $backgrounds[$rownum % $numcolors];
 1604:                         if (!$shownheader) {
 1605:                             $r->print($slotheader);
 1606:                             $shownheader = 1;
 1607:                         }
 1608:                         $r->print('<tr class="'.$bgcolor.'">'.$item.'</tr>'."\n");
 1609:                     }
 1610:                 }
 1611:                 $rownum ++;
 1612:                 my $bgcolor = $backgrounds[$rownum % $numcolors];
 1613:                 if (!$shownheader) {
 1614:                     $r->print($slotheader);
 1615:                     $shownheader = 1;
 1616:                 }
 1617:                 $r->print('<tr class="'.$bgcolor.'"><td>'."\n");
 1618:                 for (my $i=0; $i<$depth; $i++) {
 1619:                     $r->print('<img src="'.$location.'" alt="" />');
 1620:                 }
 1621:                 my $result = '<a href="'.$resource->src().'?symb='.$symb.'">'.
 1622:                              '<img class="LC_contentImage" src="/adm/lonIcons/';
 1623:                 if ($resource->is_task()) {
 1624:                     $result .= 'task.gif" alt="'.&mt('Task');
 1625:                 } else {
 1626:                     $result .= 'problem.gif" alt="'.&mt('Problem');
 1627:                 }
 1628:                 $result .= '" /><b>'.$title.'</b></a>'.('&nbsp;' x6).'</td>';
 1629:                 my $hasaction;
 1630:                 if ($status == $resource->OPEN) {
 1631:                     if ($get_choices) {
 1632:                         $hasaction = 1;
 1633:                     }
 1634:                 }
 1635:                 if ($hasaction) {
 1636:                     $result .= '<td valgn="middle">'.$msg.'</td>'.
 1637:                                '<td valign="middle">'.('&nbsp;' x6);
 1638:                 } else {
 1639:                     $result .= '<td colspan="2" valign="middle">'.$msg.'</td>';
 1640:                 }
 1641:                 $r->print($result);
 1642:                 if ($hasaction) {
 1643:                     my $formname = 'manageres_'.$reservable;
 1644:                     &show_choices($r,$symb,$formname);
 1645:                     $r->print('</td>');
 1646:                 }
 1647:                 $r->print('</tr>');
 1648:             }
 1649:         }
 1650:     }
 1651:     if ($shownheader) {
 1652:         $r->print('</table>');
 1653:     }
 1654:     if (!$reservable) {
 1655:         $r->print('<span class="LC_info">');
 1656:         if ($crstype eq 'Community') {
 1657:             $r->print(&mt('No community items currently require a reservation to gain access.'));
 1658:         } else {
 1659:             $r->print(&mt('No course items currently require a reservation to gain access.'));
 1660:         }
 1661:         $r->print('</span>');
 1662:     }
 1663:     $r->print('<p><a href="/adm/slotrequest?command=showresv">'.
 1664:               &mt('Reservation History').'</a></p>');
 1665: }
 1666: 
 1667: sub show_map_row {
 1668:     my ($depth,$location,$type,$title,$maprows) = @_;
 1669:     my $output = '<td>';
 1670:     for (my $i=0; $i<$depth-1; $i++) {
 1671:         $output .= '<img src="'.$location.'" alt="" />';
 1672:     }
 1673:     if ($type eq 'page') {
 1674:         $output .= '<img src="/adm/lonIcons/navmap.page.open.gif" alt="" />&nbsp;'."\n";
 1675:     } else {
 1676:         $output .= '<img src="/adm/lonIcons/navmap.folder.open.gif" alt="" />&nbsp;'."\n";
 1677:     }
 1678:     $output .= $title.'</td><td colspan="2">&nbsp;</td>'."\n";
 1679:     unshift (@{$maprows},$output);
 1680:     return;
 1681: }
 1682: 
 1683: sub show_reservations {
 1684:     my ($r,$uname,$udom) = @_;
 1685:     if (!defined($uname)) {
 1686:         $uname = $env{'user.name'};
 1687:     }
 1688:     if (!defined($udom)) {
 1689:         $udom = $env{'user.domain'};
 1690:     }
 1691:     my $formname = 'slotlog';
 1692:     my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
 1693:     my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
 1694:     my $crstype = &Apache::loncommon::course_type();
 1695:     my %log=&Apache::lonnet::dump('nohist_'.$cdom.'_'.$cnum.'_slotlog',$udom,$uname);
 1696:     if ($env{'form.origin'} eq 'aboutme') {
 1697:         $r->print('<div class="LC_fontsize_large">');
 1698:         my $name = &Apache::loncommon::plainname($env{'form.uname'},$env{'form.udom'},
 1699:                                                     'firstname');
 1700:         if ($crstype eq 'Community') {
 1701:             $r->print(&mt('History of member-reservable slots for: [_1]',
 1702:                           $name));
 1703:         } else {
 1704:             $r->print(&mt('History of student-reservable slots for: [_1]',
 1705:                           $name));
 1706: 
 1707:         }
 1708:         $r->print('</div>');
 1709:     }
 1710:     $r->print('<form action="/adm/slotrequest" method="post" name="'.$formname.'">');
 1711:     # set defaults
 1712:     my $now = time();
 1713:     my $defstart = $now - (7*24*3600); #7 days ago
 1714:     my %defaults = (
 1715:                      page           => '1',
 1716:                      show           => '10',
 1717:                      action         => 'any',
 1718:                      log_start_date => $defstart,
 1719:                      log_end_date   => $now,
 1720:                    );
 1721:     my $more_records = 0;
 1722: 
 1723:     # set current
 1724:     my %curr;
 1725:     foreach my $item ('show','page','action') {
 1726:         $curr{$item} = $env{'form.'.$item};
 1727:     }
 1728:     my ($startdate,$enddate) =
 1729:         &Apache::lonuserutils::get_dates_from_form('log_start_date',
 1730:                                                    'log_end_date');
 1731:     $curr{'log_start_date'} = $startdate;
 1732:     $curr{'log_end_date'} = $enddate;
 1733:     foreach my $key (keys(%defaults)) {
 1734:         if ($curr{$key} eq '') {
 1735:             $curr{$key} = $defaults{$key};
 1736:         }
 1737:     }
 1738:     my ($version) = ($r->dir_config('lonVersion') =~ /^([\d\.]+)\-/);
 1739:     $r->print(&display_filter($formname,$cdom,$cnum,\%curr,$version));
 1740:     my $showntablehdr = 0;
 1741:     my $tablehdr = &Apache::loncommon::start_data_table().
 1742:                    &Apache::loncommon::start_data_table_header_row().
 1743:                    '<th>&nbsp;</th><th>'.&mt('When').'</th><th>'.&mt('Action').'</th>'.
 1744:                    '<th>'.&mt('Description').'</th><th>'.&mt('Start time').'</th>'.
 1745:                    '<th>'.&mt('End time').'</th><th>'.&mt('Resource').'</th>'.
 1746:                    &Apache::loncommon::end_data_table_header_row();
 1747:     my ($minshown,$maxshown);
 1748:     $minshown = 1;
 1749:     my $count = 0;
 1750:     if ($curr{'show'} ne &mt('all')) {
 1751:         $maxshown = $curr{'page'} * $curr{'show'};
 1752:         if ($curr{'page'} > 1) {
 1753:             $minshown = 1 + ($curr{'page'} - 1) * $curr{'show'};
 1754:         }
 1755:     }
 1756:     my (%titles,%maptitles);
 1757:     my %lt = &reservationlog_contexts($crstype);
 1758:     foreach my $id (sort { $log{$b}{'exe_time'}<=>$log{$a}{'exe_time'} } (keys(%log))) {
 1759:         next if (($log{$id}{'exe_time'} < $curr{'log_start_date'}) ||
 1760:                  ($log{$id}{'exe_time'} > $curr{'log_end_date'}));
 1761:         if ($curr{'show'} ne &mt('all')) {
 1762:             if ($count >= $curr{'page'} * $curr{'show'}) {
 1763:                 $more_records = 1;
 1764:                 last;
 1765:             }
 1766:         }
 1767:         if ($curr{'action'} ne 'any') {
 1768:             next if ($log{$id}{'logentry'}{'action'} ne $curr{'action'});
 1769:         }
 1770:         $count ++;
 1771:         next if ($count < $minshown);
 1772:         if (!$showntablehdr) {
 1773:             $r->print($tablehdr);
 1774:             $showntablehdr = 1;
 1775:         }
 1776:         my $symb = $log{$id}{'logentry'}{'symb'};
 1777:         my $slot_name = $log{$id}{'logentry'}{'slot'};
 1778:         my %slot=&Apache::lonnet::get_slot($slot_name);
 1779:         my $description = $slot{'description'};
 1780:         my $start = ($slot{'starttime'}?
 1781:                      &Apache::lonlocal::locallocaltime($slot{'starttime'}):'');
 1782:         my $end = ($slot{'endtime'}?
 1783:                    &Apache::lonlocal::locallocaltime($slot{'endtime'}):'');
 1784:         my $title = &get_resource_title($symb,\%titles,\%maptitles);
 1785:         my $chgaction = $log{$id}{'logentry'}{'action'};
 1786:         if ($chgaction ne '' && $lt{$chgaction} ne '') {
 1787:             $chgaction = $lt{$chgaction};
 1788:         }
 1789:         $r->print(&Apache::loncommon::start_data_table_row().'<td>'.$count.'</td><td>'.&Apache::lonlocal::locallocaltime($log{$id}{'exe_time'}).'</td><td>'.$chgaction.'</td><td>'.$description.'</td><td>'.$start.'</td><td>'.$end.'</td><td>'.$title.'</td>'.&Apache::loncommon::end_data_table_row()."\n");
 1790:     }
 1791:     if ($showntablehdr) {
 1792:         $r->print(&Apache::loncommon::end_data_table().'<br />');
 1793:         if (($curr{'page'} > 1) || ($more_records)) {
 1794:             $r->print('<table><tr>');
 1795:             if ($curr{'page'} > 1) {
 1796:                 $r->print('<td><a href="javascript:chgPage('."'previous'".');">'.&mt('Previous [_1] changes',$curr{'show'}).'</a></td>');
 1797:             }
 1798:             if ($more_records) {
 1799:                 $r->print('<td><a href="javascript:chgPage('."'next'".');">'.&mt('Next [_1] changes',$curr{'show'}).'</a></td>');
 1800:             }
 1801:             $r->print('</tr></table>');
 1802:             $r->print(<<"ENDSCRIPT");
 1803: <script type="text/javascript">
 1804: function chgPage(caller) {
 1805:     if (caller == 'previous') {
 1806:         document.$formname.page.value --;
 1807:     }
 1808:     if (caller == 'next') {
 1809:         document.$formname.page.value ++;
 1810:     }
 1811:     document.$formname.submit();
 1812:     return;
 1813: }
 1814: </script>
 1815: ENDSCRIPT
 1816:         }
 1817:     } else {
 1818:         $r->print('<span class="LC_info">'
 1819:                  .&mt('There are no transactions to display.')
 1820:                  .'</span>'
 1821:         );
 1822:     }
 1823:     $r->print('<input type="hidden" name="page" value="'.$curr{'page'}.'" />'."\n".
 1824:               '<input type="hidden" name="command" value="showresv" />'."\n");
 1825:     if ($env{'form.origin'} eq 'aboutme') {
 1826:         $r->print('<input type="hidden" name="origin" value="'.$env{'form.origin'}.'" />'."\n".
 1827:                   '<input type="hidden" name="uname" value="'.$env{'form.uname'}.'" />'."\n".
 1828:                   '<input type="hidden" name="udom" value="'.$env{'form.udom'}.'" />'."\n");
 1829:     }
 1830:     $r->print('</form>');
 1831:     return;
 1832: }
 1833: 
 1834: sub show_reservations_log {
 1835:     my ($r) = @_;
 1836:     my $badslot;
 1837:     my $crstype = &Apache::loncommon::course_type();
 1838:     if ($env{'form.slotname'} eq '') {
 1839:         $r->print('<div class="LC_warning">'.&mt('No slot name provided').'</div>');
 1840:         $badslot = 1;
 1841:     } else {
 1842:         my %slot=&Apache::lonnet::get_slot($env{'form.slotname'});
 1843:         if (keys(%slot) == 0) {
 1844:             $r->print('<div class="LC_warning">'.&mt('Invalid slot name: [_1]',$env{'form.slotname'}).'</div>');
 1845:             $badslot = 1;
 1846:         } elsif ($slot{type} ne 'schedulable_student') {
 1847:             my $description = &get_description($env{'form.slotname'},\%slot);
 1848:             $r->print('<div class="LC_warning">');
 1849:             if ($crstype eq 'Community') {
 1850:                 $r->print(&mt('Reservation history unavailable for non-member-reservable slot: [_1].',$description));
 1851:             } else {
 1852:                 $r->print(&mt('Reservation history unavailable for non-student-reservable slot: [_1].',$description));
 1853:             }
 1854:             $r->print('</div>');
 1855:             $badslot = 1;
 1856:         }
 1857:     }
 1858:     if ($badslot) {
 1859:         $r->print('<p><a href="/adm/slotrequest?command=showslots">'.
 1860:                   &mt('Return to slot list').'</a></p>');
 1861:         return;
 1862:     }
 1863:     my $formname = 'reservationslog';
 1864:     my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
 1865:     my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
 1866:     my %slotlog=&Apache::lonnet::dump('nohist_slotreservationslog',$cdom,$cnum);
 1867:     if ((keys(%slotlog))[0]=~/^error\:/) { undef(%slotlog); }
 1868: 
 1869:     my (%log,@allsymbs);
 1870:     if (keys(%slotlog)) {
 1871:         foreach my $key (keys(%slotlog)) {
 1872:             if (ref($slotlog{$key}) eq 'HASH') {
 1873:                 if (ref($slotlog{$key}{'logentry'}) eq 'HASH') {
 1874:                     if ($slotlog{$key}{'logentry'}{'slot'} eq $env{'form.slotname'}) {
 1875:                         $log{$key} = $slotlog{$key};
 1876:                         if ($slotlog{$key}{'logentry'}{'symb'} ne '') {
 1877:                             push(@allsymbs,$slotlog{$key}{'logentry'}{'symb'});
 1878:                         }
 1879:                     }
 1880:                 }
 1881:             }
 1882:         }
 1883:     }
 1884: 
 1885:     $r->print('<form action="/adm/slotrequest" method="post" name="'.$formname.'">');
 1886:     my %saveable_parameters = ('show' => 'scalar',);
 1887:     &Apache::loncommon::store_course_settings('reservationslog',
 1888:                                               \%saveable_parameters);
 1889:     &Apache::loncommon::restore_course_settings('reservationslog',
 1890:                                                 \%saveable_parameters);
 1891:     # set defaults
 1892:     my $now = time();
 1893:     my $defstart = $now - (7*24*3600); #7 days ago
 1894:     my %defaults = (
 1895:                      page           => '1',
 1896:                      show           => '10',
 1897:                      chgcontext     => 'any',
 1898:                      action         => 'any',
 1899:                      symb           => 'any',
 1900:                      log_start_date => $defstart,
 1901:                      log_end_date   => $now,
 1902:                    );
 1903:     my $more_records = 0;
 1904: 
 1905:     # set current
 1906:     my %curr;
 1907:     foreach my $item ('show','page','chgcontext','action','symb') {
 1908:         $curr{$item} = $env{'form.'.$item};
 1909:     }
 1910:     my ($startdate,$enddate) =
 1911:         &Apache::lonuserutils::get_dates_from_form('log_start_date',
 1912:                                                    'log_end_date');
 1913:     $curr{'log_start_date'} = $startdate;
 1914:     $curr{'log_end_date'} = $enddate;
 1915:     foreach my $key (keys(%defaults)) {
 1916:         if ($curr{$key} eq '') {
 1917:             $curr{$key} = $defaults{$key};
 1918:         }
 1919:     }
 1920:     my (%whodunit,%changed,$version);
 1921:     ($version) = ($r->dir_config('lonVersion') =~ /^([\d\.]+)\-/);
 1922: 
 1923:     my %slot=&Apache::lonnet::get_slot($env{'form.slotname'});
 1924:     my $description = $slot{'description'};
 1925:     $r->print('<span class="LC_fontsize_large">');
 1926:     if ($crstype eq 'Community') {
 1927:         $r->print(&mt('Reservation changes for member-reservable slot: [_1]',$description));
 1928:     } else {
 1929:         $r->print(&mt('Reservation changes for student-reservable slot: [_1]',$description));
 1930:     }
 1931:     $r->print('</span><br />');
 1932:     $r->print(&display_filter($formname,$cdom,$cnum,\%curr,$version,\@allsymbs));
 1933:     my $showntablehdr = 0;
 1934:     my $tablehdr = &Apache::loncommon::start_data_table().
 1935:                    &Apache::loncommon::start_data_table_header_row().
 1936:                    '<th>&nbsp;</th><th>'.&mt('When').'</th><th>'.&mt('Who made the change').
 1937:                    '</th><th>'.&mt('Affected User').'</th><th>'.&mt('Action').'</th>'.
 1938:                    '<th>'.&mt('Resource').'</th><th>'.&mt('Context').'</th>'.
 1939:                    &Apache::loncommon::end_data_table_header_row();
 1940:     my ($minshown,$maxshown);
 1941:     $minshown = 1;
 1942:     my $count = 0;
 1943:     if ($curr{'show'} ne &mt('all')) {
 1944:         $maxshown = $curr{'page'} * $curr{'show'};
 1945:         if ($curr{'page'} > 1) {
 1946:             $minshown = 1 + ($curr{'page'} - 1) * $curr{'show'};
 1947:         }
 1948:     }
 1949:     my %lt = &reservationlog_contexts($crstype);
 1950:     my (%titles,%maptitles);
 1951:     foreach my $id (sort { $log{$b}{'exe_time'}<=>$log{$a}{'exe_time'} } (keys(%log))) {
 1952:         next if (($log{$id}{'exe_time'} < $curr{'log_start_date'}) ||
 1953:                  ($log{$id}{'exe_time'} > $curr{'log_end_date'}));
 1954:         if ($curr{'show'} ne &mt('all')) {
 1955:             if ($count >= $curr{'page'} * $curr{'show'}) {
 1956:                 $more_records = 1;
 1957:                 last;
 1958:             }
 1959:         }
 1960:         if ($curr{'chgcontext'} ne 'any') {
 1961:             if ($curr{'chgcontext'} eq 'user') {
 1962:                 next if (($log{$id}{'logentry'}{'context'} ne 'user') && 
 1963:                          ($log{$id}{'logentry'}{'context'} ne 'usermanage'));
 1964:             } else {
 1965:                 next if ($log{$id}{'logentry'}{'context'} ne $curr{'chgcontext'});
 1966:             }
 1967:         }
 1968:         if ($curr{'action'} ne 'any') {
 1969:             next if ($log{$id}{'logentry'}{'action'} ne $curr{'action'});
 1970:         }
 1971:         if ($curr{'symb'} ne 'any') {
 1972:             next if ($log{$id}{'logentry'}{'symb'} ne $curr{'symb'});
 1973:         }
 1974:         $count ++;
 1975:         next if ($count < $minshown);
 1976:         if (!$showntablehdr) {
 1977:             $r->print($tablehdr);
 1978:             $showntablehdr = 1;
 1979:         }
 1980:         if ($whodunit{$log{$id}{'exe_uname'}.':'.$log{$id}{'exe_udom'}} eq '') {
 1981:             $whodunit{$log{$id}{'exe_uname'}.':'.$log{$id}{'exe_udom'}} =
 1982:                 &Apache::loncommon::plainname($log{$id}{'exe_uname'},$log{$id}{'exe_udom'});
 1983:         }
 1984:         if ($changed{$log{$id}{'uname'}.':'.$log{$id}{'udom'}} eq '') {
 1985:             $changed{$log{$id}{'uname'}.':'.$log{$id}{'udom'}} =
 1986:                 &Apache::loncommon::plainname($log{$id}{'uname'},$log{$id}{'udom'});
 1987:         }
 1988:         my $symb = $log{$id}{'logentry'}{'symb'};
 1989:         my $title = &get_resource_title($symb,\%titles,\%maptitles); 
 1990:         my $chgcontext = $log{$id}{'logentry'}{'context'};
 1991:         if ($chgcontext ne '' && $lt{$chgcontext} ne '') {
 1992:             $chgcontext = $lt{$chgcontext};
 1993:         }
 1994:         my $chgaction = $log{$id}{'logentry'}{'action'};
 1995:         if ($chgaction ne '' && $lt{$chgaction} ne '') {
 1996:             $chgaction = $lt{$chgaction}; 
 1997:         }
 1998:         $r->print(&Apache::loncommon::start_data_table_row().'<td>'.$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>'.$chgcontext.'</td>'.&Apache::loncommon::end_data_table_row()."\n");
 1999:     }
 2000:     if ($showntablehdr) {
 2001:         $r->print(&Apache::loncommon::end_data_table().'<br />');
 2002:         if (($curr{'page'} > 1) || ($more_records)) {
 2003:             $r->print('<table><tr>');
 2004:             if ($curr{'page'} > 1) {
 2005:                 $r->print('<td><a href="javascript:chgPage('."'previous'".');">'.&mt('Previous [_1] changes',$curr{'show'}).'</a></td>');
 2006:             }
 2007:             if ($more_records) {
 2008:                 $r->print('<td><a href="javascript:chgPage('."'next'".');">'.&mt('Next [_1] changes',$curr{'show'}).'</a></td>');
 2009:             }
 2010:             $r->print('</tr></table>');
 2011:             $r->print(<<"ENDSCRIPT");
 2012: <script type="text/javascript">
 2013: function chgPage(caller) {
 2014:     if (caller == 'previous') {
 2015:         document.$formname.page.value --;
 2016:     }
 2017:     if (caller == 'next') {
 2018:         document.$formname.page.value ++;
 2019:     }
 2020:     document.$formname.submit();
 2021:     return;
 2022: }
 2023: </script>
 2024: ENDSCRIPT
 2025:         }
 2026:     } else {
 2027:         $r->print(&mt('There are no records to display.'));
 2028:     }
 2029:     $r->print('<input type="hidden" name="page" value="'.$curr{'page'}.'" />'.
 2030:               '<input type="hidden" name="slotname" value="'.$env{'form.slotname'}.'" />'.
 2031:               '<input type="hidden" name="command" value="slotlog" /></form>'.
 2032:               '<p><a href="/adm/slotrequest?command=showslots">'.
 2033:               &mt('Return to slot list').'</a></p>');
 2034:     return;
 2035: }
 2036: 
 2037: sub get_resource_title {
 2038:     my ($symb,$titles,$maptitles) = @_;
 2039:     my $title;
 2040:     if ((ref($titles) eq 'HASH') && (ref($maptitles) eq 'HASH')) { 
 2041:         if (defined($titles->{$symb})) {
 2042:             $title = $titles->{$symb};
 2043:         } else {
 2044:             $title = &Apache::lonnet::gettitle($symb);
 2045:             my $maptitle;
 2046:             my ($mapurl) = &Apache::lonnet::decode_symb($symb);
 2047:             if (defined($maptitles->{$mapurl})) {
 2048:                 $maptitle = $maptitles->{$mapurl};
 2049:             } else {
 2050:                 if ($mapurl eq $env{'course.'.$env{'request.course.id'}.'.url'}) {
 2051:                     $maptitle=&mt('Main Course Documents');
 2052:                 } else {
 2053:                     $maptitle=&Apache::lonnet::gettitle($mapurl);
 2054:                 }
 2055:                 $maptitles->{$mapurl} = $maptitle;
 2056:             }
 2057:             if ($maptitle ne '') {
 2058:                 $title .= ' '.&mt('(in [_1])',$maptitle);
 2059:             }
 2060:             $titles->{$symb} = $title;
 2061:         }
 2062:     } else {
 2063:         $title = $symb;
 2064:     }
 2065:     return $title;
 2066: }
 2067: 
 2068: sub reservationlog_contexts {
 2069:     my ($crstype) = @_;
 2070:     my %lt = &Apache::lonlocal::texthash (
 2071:                                              any        => 'Any',
 2072:                                              user       => 'By student',
 2073:                                              manage     => 'Via Slot Manager',
 2074:                                              parameter  => 'Via Parameter Manager',
 2075:                                              reserve    => 'Made reservation',
 2076:                                              release    => 'Dropped reservation',
 2077:                                              usermanage => 'By student', 
 2078:                                          );
 2079:     if ($crstype eq 'Community') {
 2080:         $lt{'user'} = &mt('By member');
 2081:         $lt{'usermanage'} = $lt{'user'};
 2082:     }
 2083:     return %lt;
 2084: }
 2085: 
 2086: sub display_filter {
 2087:     my ($formname,$cdom,$cnum,$curr,$version,$allsymbs) = @_;
 2088:     my $nolink = 1;
 2089:     my (%titles,%maptitles);
 2090:     my $output = '<br /><table><tr><td valign="top">'.
 2091:                  '<span class="LC_nobreak"><b>'.&mt('Changes/page:').'</b><br />'.
 2092:                  &Apache::lonmeta::selectbox('show',$curr->{'show'},undef,
 2093:                                               (&mt('all'),5,10,20,50,100,1000,10000)).
 2094:                  '</td><td>&nbsp;&nbsp;</td>';
 2095:     my $startform =
 2096:         &Apache::lonhtmlcommon::date_setter($formname,'log_start_date',
 2097:                                             $curr->{'log_start_date'},undef,
 2098:                                             undef,undef,undef,undef,undef,undef,$nolink);
 2099:     my $endform =
 2100:         &Apache::lonhtmlcommon::date_setter($formname,'log_end_date',
 2101:                                             $curr->{'log_end_date'},undef,
 2102:                                             undef,undef,undef,undef,undef,undef,$nolink);
 2103:     my $crstype = &Apache::loncommon::course_type();
 2104:     my %lt = &reservationlog_contexts($crstype);
 2105:     $output .= '<td valign="top"><b>'.&mt('Window during which changes occurred:').
 2106:                '</b><br /><table><tr><td>'.&mt('After:').
 2107:                '</td><td>'.$startform.'</td></tr><tr><td>'.&mt('Before:').'</td><td>'.
 2108:                $endform.'</td></tr></table></td><td>&nbsp;&nbsp;</td>';
 2109:     if (ref($allsymbs) eq 'ARRAY') {
 2110:         $output .= '<td valign="top"><b>'.&mt('Resource').'</b><br />'.
 2111:                    '<select name="resource"><option value="any"';
 2112:         if ($curr->{'resource'} eq 'any') {
 2113:             $output .= ' selected="selected"';
 2114:         }
 2115:         $output .=  '>'.&mt('Any').'</option>'."\n";
 2116:         foreach my $symb (@{$allsymbs}) {
 2117:             my $title = &get_resource_title($symb,\%titles,\%maptitles);
 2118:             my $selstr = '';
 2119:             if ($curr->{'resource'} eq $symb) {
 2120:                 $selstr = ' selected="selected"';
 2121:             }
 2122:             $output .= '  <option value="'.$symb.'"'.$selstr.'>'.$title.'</option>';
 2123:         }
 2124:         $output .= '</select></td><td>&nbsp;&nbsp;</td><td valign="top"><b>'.
 2125:                    &mt('Context:').'</b><br /><select name="chgcontext">';
 2126:         foreach my $chgtype ('any','user','manage','parameter') {
 2127:             my $selstr = '';
 2128:             if ($curr->{'chgcontext'} eq $chgtype) {
 2129:                 $output .= $selstr = ' selected="selected"';
 2130:             }
 2131:             $output .= '<option value="'.$chgtype.'"'.$selstr.'>'.$lt{$chgtype}.'</option>'."\n";
 2132:         }
 2133:         $output .= '</select></td>';
 2134:     } else {
 2135:         $output .= '<td valign="top"><b>'.&mt('Action').'</b><br />'.
 2136:                    '<select name="action"><option value="any"';
 2137:         if ($curr->{'action'} eq 'any') {
 2138:             $output .= ' selected="selected"';
 2139:         }
 2140:         $output .=  '>'.&mt('Any').'</option>'."\n";
 2141:         foreach my $actiontype ('reserve','release') {
 2142:             my $selstr = '';
 2143:             if ($curr->{'action'} eq $actiontype) {
 2144:                 $output .= $selstr = ' selected="selected"';
 2145:             }
 2146:             $output .= '<option value="'.$actiontype.'"'.$selstr.'>'.$lt{$actiontype}.'</option>'."\n";
 2147:         }
 2148:         $output .= '</select></td>';
 2149:     }
 2150:     $output .= '<td>&nbsp;&nbsp;</td><td valign="middle"><input type="submit" value="'.
 2151:                &mt('Update Display').'" /></tr></table>'.
 2152:                '<p class="LC_info">'.
 2153:                &mt('Only changes made from servers running LON-CAPA [_1] or later are displayed.'
 2154:                   ,'2.9.0');
 2155:     if ($version) {
 2156:         $output .= ' '.&mt('This LON-CAPA server is version [_1]',$version);
 2157:     }
 2158:     $output .= '</p><hr /><br />';
 2159:     return $output;
 2160: }
 2161: 
 2162: sub slot_change_messaging {
 2163:     my ($setting,$subject,$msg,$action) = @_;
 2164:     my $user = $env{'user.name'};
 2165:     my $domain = $env{'user.domain'};
 2166:     my ($message_status,$comment_status);
 2167:     if ($setting eq 'only_student'
 2168:         || $setting eq 'student_and_user_notes_screen') {
 2169:         $message_status =
 2170:             &Apache::lonmsg::user_normal_msg($user,$domain,$subject,$msg);
 2171:         $message_status = '<li>'.&mt('Sent to you: [_1]',
 2172:                                     $message_status).' </li>';
 2173:     }
 2174:     if ($setting eq 'student_and_user_notes_screen') {
 2175:         $comment_status =
 2176:             &Apache::lonmsg::store_instructor_comment($subject.'<br />'.
 2177:                                                       $msg,$user,$domain);
 2178:         $comment_status = '<li>'.&mt('Entry added to course record (viewable by instructor): [_1]',
 2179:                                     $comment_status).'</li>';
 2180:     }
 2181:     if ($message_status || $comment_status) {
 2182:         my $msgtitle;
 2183:         if ($action eq 'reserve') {
 2184:             $msgtitle = &mt('Status of messages about saved reservation');
 2185:         } elsif ($action eq 'release') {
 2186:             $msgtitle = &mt('Status of messages about dropped reservation');
 2187:         } elsif ($action eq 'nochange') {
 2188:             $msgtitle = &mt('Status of messages about unchanged existing reservation');
 2189:         }
 2190:         return '<span class="LC_info">'.$msgtitle.'</span>'
 2191:                .'<ul>'
 2192:                .$message_status
 2193:                .$comment_status
 2194:                .'</ul><hr />';
 2195:     }
 2196: }
 2197: 
 2198: sub upload_start {
 2199:     my ($r)=@_;    
 2200:     $r->print(
 2201:         &Apache::grades::checkforfile_js()
 2202:        .'<h3>'.&mt('Specify a file containing the slot definitions.').'</h3>'
 2203:        .'<form method="post" enctype="multipart/form-data"'
 2204:        .' action="/adm/slotrequest" name="slotupload">'
 2205:        .'<input type="hidden" name="command" value="csvuploadmap" />'
 2206:        .&Apache::lonhtmlcommon::start_pick_box()
 2207:        .&Apache::lonhtmlcommon::row_title(&mt('File'))
 2208:        .&Apache::loncommon::upfile_select_html()
 2209:        .&Apache::lonhtmlcommon::row_closure()
 2210:        .&Apache::lonhtmlcommon::row_title(
 2211:             '<label for="noFirstLine">'
 2212:            .&mt('Ignore First Line')
 2213:            .'</label>')
 2214:        .'<input type="checkbox" name="noFirstLine" id="noFirstLine" />'
 2215:        .&Apache::lonhtmlcommon::row_closure(1)
 2216:        .&Apache::lonhtmlcommon::end_pick_box()
 2217:        .'<p>'
 2218:        .'<input type="button" onclick="javascript:checkUpload(this.form);"'
 2219:        .' value="'.&mt('Next').'" />'
 2220:        .'</p>'
 2221:       .'</form>'
 2222:     );
 2223: }
 2224: 
 2225: sub csvuploadmap_header {
 2226:     my ($r,$datatoken,$distotal)= @_;
 2227:     my $javascript;
 2228:     if ($env{'form.upfile_associate'} eq 'reverse') {
 2229: 	$javascript=&csvupload_javascript_reverse_associate();
 2230:     } else {
 2231: 	$javascript=&csvupload_javascript_forward_associate();
 2232:     }
 2233: 
 2234:     my $checked=(($env{'form.noFirstLine'})?' checked="checked"':'');
 2235:     my $ignore=&mt('Ignore First Line');
 2236: 	my $help_field = &Apache::loncommon::help_open_topic('Slot SelectingField');
 2237: 
 2238:     $r->print(<<ENDPICK);
 2239: <form method="post" enctype="multipart/form-data" action="/adm/slotrequest" name="slotupload">
 2240: <h3>Identify fields $help_field</h3>	
 2241: Total number of records found in file: $distotal <hr />
 2242: Enter as many fields as you can. The system will inform you and bring you back
 2243: to this page if the data selected is insufficient to create the slots.<hr />
 2244: <input type="button" value="Reverse Association" onclick="javascript:this.form.associate.value='Reverse Association';submit(this.form);" />
 2245: <label><input type="checkbox" name="noFirstLine"$checked />$ignore</label>
 2246: <input type="hidden" name="associate"  value="" />
 2247: <input type="hidden" name="datatoken"  value="$datatoken" />
 2248: <input type="hidden" name="fileupload" value="$env{'form.fileupload'}" />
 2249: <input type="hidden" name="upfiletype" value="$env{'form.upfiletype'}" />
 2250: <input type="hidden" name="upfile_associate" 
 2251:                                        value="$env{'form.upfile_associate'}" />
 2252: <input type="hidden" name="command"    value="csvuploadassign" />
 2253: <hr />
 2254: <script type="text/javascript" language="Javascript">
 2255: $javascript
 2256: </script>
 2257: ENDPICK
 2258:     return '';
 2259: 
 2260: }
 2261: 
 2262: sub csvuploadmap_footer {
 2263:     my ($request,$i,$keyfields) =@_;
 2264:     my $buttontext = &mt('Create Slots');
 2265:     $request->print(<<ENDPICK);
 2266: </table>
 2267: <input type="hidden" name="nfields" value="$i" />
 2268: <input type="hidden" name="keyfields" value="$keyfields" />
 2269: <input type="button" onclick="javascript:verify(this.form)" value="$buttontext" /><br />
 2270: </form>
 2271: ENDPICK
 2272: }
 2273: 
 2274: sub csvupload_javascript_reverse_associate {
 2275:     my $error1=&mt('You need to specify the name, starttime, endtime and a type');
 2276:     return(<<ENDPICK);
 2277:   function verify(vf) {
 2278:     var foundstart=0;
 2279:     var foundend=0;
 2280:     var foundname=0;
 2281:     var foundtype=0;
 2282:     for (i=0;i<=vf.nfields.value;i++) {
 2283:       tw=eval('vf.f'+i+'.selectedIndex');
 2284:       if (i==0 && tw!=0) { foundname=1; }
 2285:       if (i==1 && tw!=0) { foundtype=1; }
 2286:       if (i==2 && tw!=0) { foundstat=1; }
 2287:       if (i==3 && tw!=0) { foundend=1; }
 2288:     }
 2289:     if (foundstart==0 && foundend==0 && foundtype==0 && foundname==0) {
 2290: 	alert('$error1');
 2291: 	return;
 2292:     }
 2293:     vf.submit();
 2294:   }
 2295:   function flip(vf,tf) {
 2296:   }
 2297: ENDPICK
 2298: }
 2299: 
 2300: sub csvupload_javascript_forward_associate {
 2301:     my $error1=&mt('You need to specify the name, starttime, endtime and a type');
 2302:   return(<<ENDPICK);
 2303:   function verify(vf) {
 2304:     var foundstart=0;
 2305:     var foundend=0;
 2306:     var foundname=0;
 2307:     var foundtype=0;
 2308:     for (i=0;i<=vf.nfields.value;i++) {
 2309:       tw=eval('vf.f'+i+'.selectedIndex');
 2310:       if (tw==1) { foundname=1; }
 2311:       if (tw==2) { foundtype=1; }
 2312:       if (tw==3) { foundstat=1; }
 2313:       if (tw==4) { foundend=1; }
 2314:     }
 2315:     if (foundstart==0 && foundend==0 && foundtype==0 && foundname==0) {
 2316: 	alert('$error1');
 2317: 	return;
 2318:     }
 2319:     vf.submit();
 2320:   }
 2321:   function flip(vf,tf) {
 2322:   }
 2323: ENDPICK
 2324: }
 2325: 
 2326: sub csv_upload_map {
 2327:     my ($r)= @_;
 2328: 
 2329:     my $datatoken;
 2330:     if (!$env{'form.datatoken'}) {
 2331: 	$datatoken=&Apache::loncommon::upfile_store($r);
 2332:     } else {
 2333: 	$datatoken=$env{'form.datatoken'};
 2334: 	&Apache::loncommon::load_tmp_file($r);
 2335:     }
 2336:     my @records=&Apache::loncommon::upfile_record_sep();
 2337:     if ($env{'form.noFirstLine'}) { shift(@records); }
 2338:     &csvuploadmap_header($r,$datatoken,$#records+1);
 2339:     my ($i,$keyfields);
 2340:     if (@records) {
 2341: 	my @fields=&csvupload_fields();
 2342: 
 2343: 	if ($env{'form.upfile_associate'} eq 'reverse') {	
 2344: 	    &Apache::loncommon::csv_print_samples($r,\@records);
 2345: 	    $i=&Apache::loncommon::csv_print_select_table($r,\@records,
 2346: 							  \@fields);
 2347: 	    foreach (@fields) { $keyfields.=$_->[0].','; }
 2348: 	    chop($keyfields);
 2349: 	} else {
 2350: 	    unshift(@fields,['none','']);
 2351: 	    $i=&Apache::loncommon::csv_samples_select_table($r,\@records,
 2352: 							    \@fields);
 2353: 	    my %sone=&Apache::loncommon::record_sep($records[0]);
 2354: 	    $keyfields=join(',',sort(keys(%sone)));
 2355: 	}
 2356:     }
 2357:     &csvuploadmap_footer($r,$i,$keyfields);
 2358: 
 2359:     return '';
 2360: }
 2361: 
 2362: sub csvupload_fields {
 2363:     return (['name','Slot name'],
 2364: 	    ['type','Type of slot'],
 2365: 	    ['starttime','Start Time of slot'],
 2366: 	    ['endtime','End Time of slot'],
 2367: 	    ['startreserve','Reservation Start Time'],
 2368:             ['endreserve','Reservation End Time'],
 2369:             ['reservationmsg','Message when reservation changed'],
 2370: 	    ['ip','IP or DNS restriction'],
 2371: 	    ['proctor','List of proctor ids'],
 2372: 	    ['description','Slot Description'],
 2373: 	    ['maxspace','Maximum number of reservations'],
 2374: 	    ['symb','Resource Restriction'],
 2375: 	    ['uniqueperiod','Date range of slot exclusion'],
 2376: 	    ['secret','Secret word proctor uses to validate'],
 2377: 	    ['allowedsections','Sections slot is restricted to'],
 2378: 	    ['allowedusers','Users slot is restricted to'],
 2379: 	    );
 2380: }
 2381: 
 2382: sub csv_upload_assign {
 2383:     my ($r,$mgr)= @_;
 2384:     &Apache::loncommon::load_tmp_file($r);
 2385:     my @slotdata = &Apache::loncommon::upfile_record_sep();
 2386:     if ($env{'form.noFirstLine'}) { shift(@slotdata); }
 2387:     my %fields=&Apache::grades::get_fields();
 2388:     $r->print('<h3>'.&mt('Creating Slots').'</h3>');
 2389:     my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
 2390:     my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
 2391:     my $countdone=0;
 2392:     my @errors;
 2393:     foreach my $slot (@slotdata) {
 2394: 	my %slot;
 2395: 	my %entries=&Apache::loncommon::record_sep($slot);
 2396: 	my $domain;
 2397: 	my $name=$entries{$fields{'name'}};
 2398: 	if ($name=~/^\s*$/) {
 2399: 	    push(@errors,"Did not create slot with no name");
 2400: 	    next;
 2401: 	}
 2402: 	if ($name=~/\s/) { 
 2403: 	    push(@errors,"$name not created -- Name must not contain spaces");
 2404: 	    next;
 2405: 	}
 2406: 	if ($name=~/\W/) { 
 2407: 	    push(@errors,"$name not created -- Name must contain only letters, numbers and _");
 2408: 	    next;
 2409: 	}
 2410: 	if ($entries{$fields{'type'}}) {
 2411: 	    $slot{'type'}=$entries{$fields{'type'}};
 2412: 	} else {
 2413: 	    $slot{'type'}='preassigned';
 2414: 	}
 2415: 	if ($slot{'type'} ne 'preassigned' &&
 2416: 	    $slot{'type'} ne 'schedulable_student') {
 2417: 	    push(@errors,"$name not created -- invalid type ($slot{'type'}) must be either preassigned or schedulable_student");
 2418: 	    next;
 2419: 	}
 2420: 	if ($entries{$fields{'starttime'}}) {
 2421: 	    $slot{'starttime'}=&UnixDate($entries{$fields{'starttime'}},"%s");
 2422: 	}
 2423: 	if ($entries{$fields{'endtime'}}) {
 2424: 	    $slot{'endtime'}=&UnixDate($entries{$fields{'endtime'}},"%s");
 2425: 	}
 2426: 
 2427: 	# start/endtime must be defined and greater than zero
 2428: 	if (!$slot{'starttime'}) {
 2429: 	    push(@errors,"$name not created -- Invalid start time");
 2430: 	    next;
 2431: 	}
 2432: 	if (!$slot{'endtime'}) {
 2433: 	    push(@errors,"$name not created -- Invalid end time");
 2434: 	    next;
 2435: 	}
 2436: 	if ($slot{'starttime'} > $slot{'endtime'}) {
 2437: 	    push(@errors,"$name not created -- Slot starts after it ends");
 2438: 	    next;
 2439: 	}
 2440: 
 2441: 	if ($entries{$fields{'startreserve'}}) {
 2442: 	    $slot{'startreserve'}=
 2443: 		&UnixDate($entries{$fields{'startreserve'}},"%s");
 2444: 	}
 2445: 	if (defined($slot{'startreserve'})
 2446: 	    && $slot{'startreserve'} > $slot{'starttime'}) {
 2447: 	    push(@errors,"$name not created -- Slot's reservation start time is after the slot's start time.");
 2448: 	    next;
 2449: 	}
 2450: 
 2451:         if ($entries{$fields{'endreserve'}}) {
 2452:             $slot{'endreserve'}=
 2453:                 &UnixDate($entries{$fields{'endreserve'}},"%s");
 2454:         }
 2455:         if (defined($slot{'endreserve'})
 2456:             && $slot{'endreserve'} > $slot{'starttime'}) {
 2457:             push(@errors,"$name not created -- Slot's reservation end time is after the slot's start time.");
 2458:             next;
 2459:         }
 2460: 
 2461:         if ($slot{'type'} eq 'schedulable_student') {
 2462:             if ($entries{$fields{'reservationmsg'}}) {
 2463:                  if (($entries{$fields{'reservationmsg'}} eq 'only_student') ||
 2464:                      ($entries{$fields{'reservationmsg'}} eq 'student_and_user_notes_screen')) {
 2465:                       $slot{'reservationmsg'}=$entries{$fields{'reservationmsg'}};
 2466:                  } else {
 2467:                       unless (($entries{$fields{'reservationmsg'}} eq 'none') ||
 2468:                               ($entries{$fields{'reservationmsg'}} eq '')) {
 2469:                           push(@errors,"$name -- Slot's reservationmsg setting ignored - not one of: 'only_student', 'student_and_user_notes_screen', 'none' or ''");
 2470:                       }
 2471:                  }
 2472:             }
 2473:         }
 2474: 
 2475: 	foreach my $key ('ip','proctor','description','maxspace',
 2476: 			 'secret','symb') {
 2477: 	    if ($entries{$fields{$key}}) {
 2478: 		$slot{$key}=$entries{$fields{$key}};
 2479: 	    }
 2480: 	}
 2481: 
 2482: 	if ($entries{$fields{'uniqueperiod'}}) {
 2483: 	    my ($start,$end)=split(',',$entries{$fields{'uniqueperiod'}});
 2484: 	    my @times=(&UnixDate($start,"%s"),
 2485: 		       &UnixDate($end,"%s"));
 2486: 	    $slot{'uniqueperiod'}=\@times;
 2487: 	}
 2488: 	if (defined($slot{'uniqueperiod'})
 2489: 	    && $slot{'uniqueperiod'}[0] > $slot{'uniqueperiod'}[1]) {
 2490: 	    push(@errors,"$name not created -- Slot's unique period start time is later than the unique period's end time.");
 2491: 	    next;
 2492: 	}
 2493: 
 2494: 	&Apache::lonnet::cput('slots',{$name=>\%slot},$cdom,$cname);
 2495: 	$r->print('.');
 2496: 	$r->rflush();
 2497: 	$countdone++;
 2498:     }
 2499:     if ($countdone) {
 2500:         &Apache::lonnet::devalidate_slots_cache($cname,$cdom); 
 2501:     }
 2502:     $r->print('<p>'.&mt('Created [quant,_1,slot]',$countdone)."\n".'</p>');
 2503:     foreach my $error (@errors) {
 2504: 	$r->print('<p><span class="LC_warning">'.$error.'</span></p>'."\n");
 2505:     }
 2506:     &show_table($r,$mgr);
 2507:     return '';
 2508: }
 2509: 
 2510: sub slot_command_titles {
 2511:     my %titles = (
 2512:                  slotlog            => 'Reservation Logs',
 2513:                  showslots          => 'Manage Slots',
 2514:                  showresv           => 'Reservation History',
 2515:                  manageresv         => 'Manage Reservations',
 2516:                  uploadstart        => 'Upload Slots File',
 2517:                  csvuploadmap       => 'Upload Slots File',
 2518:                  csvuploadassign    => 'Upload Slots File',
 2519:                  delete             => 'Slot Deletion',
 2520:                  release            => 'Reservation Result',
 2521:                  remove_reservation => 'Remove Registration',
 2522:                  get_reservation    => 'Request Reservation',
 2523:               );
 2524:     return %titles;
 2525: }
 2526: 
 2527: sub slot_reservationmsg_options {
 2528:     my %options = &Apache::lonlocal::texthash (
 2529:                         only_student  => 'Sent to student',
 2530:         student_and_user_notes_screen => 'Sent to student and added to user notes',
 2531:                                  none => 'None sent and no record in user notes',
 2532:     );
 2533:     return %options;
 2534: }
 2535: 
 2536: sub handler {
 2537:     my $r=shift;
 2538: 
 2539:     &Apache::loncommon::content_type($r,'text/html');
 2540:     &Apache::loncommon::no_cache($r);
 2541:     if ($r->header_only()) {
 2542: 	$r->send_http_header();
 2543: 	return OK;
 2544:     }
 2545: 
 2546:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'});
 2547: 
 2548:     my %crumb_titles = &slot_command_titles();
 2549:     my $brcrum;
 2550: 
 2551:     my $vgr=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
 2552:     my $mgr=&Apache::lonnet::allowed('mgr',$env{'request.course.id'});
 2553:     if ($env{'form.command'} eq 'showslots') {
 2554:         if (($vgr ne 'F') && ($mgr ne 'F')) {
 2555:             $env{'form.command'} = 'manageresv'; 
 2556:         }
 2557:     } elsif ($env{'form.command'} eq 'manageresv') {
 2558:         if (($vgr eq 'F') || ($mgr eq 'F')) {
 2559:             $env{'form.command'} = 'showslots';
 2560:         }
 2561:     }
 2562:     my $title='Requesting Another Worktime';
 2563:     if ($env{'form.command'} eq 'showresv') {
 2564:         $title = 'Reservation History';
 2565:         if ($env{'form.origin'} eq 'aboutme') {
 2566:             $brcrum =[{href=>"/adm/$env{'form.udom'}/$env{'form.uname'}/aboutme",text=>'Personal Information Page'}];
 2567:         } else {
 2568:             $brcrum =[{href=>"/adm/slotrequest?command=manageresv",text=>'Manage Reservations'}];
 2569:         }
 2570:         if (ref($brcrum) eq 'ARRAY') {
 2571:             push(@{$brcrum},{href=>"/adm/slotrequest?command=showresv",text=>$title});
 2572:         }
 2573:     } elsif ($env{'form.command'} eq 'manageresv') {
 2574:         $title = 'Manage Reservations';
 2575:         $brcrum =[{href=>"/adm/slotrequest?command=manageresv",text=>$title}];
 2576:     } elsif ($vgr eq 'F') {
 2577:         if ($env{'form.command'} =~ /^(slotlog|showslots|uploadstart|csvuploadmap|csvuploadassign|delete|release|remove_registration)$/) {
 2578:             $brcrum =[{href=>"/adm/slotrequest?command=showslots",
 2579:                        text=>$crumb_titles{'showslots'}}];
 2580: 	    $title = 'Managing Slots';
 2581:             unless ($env{'form.command'} eq 'showslots') {
 2582:                 if (ref($brcrum) eq 'ARRAY') {
 2583:                     push(@{$brcrum},{href=>"/adm/slotrequest?command=$env{'form.command'}",text=>$crumb_titles{$env{'form.command'}}});
 2584:                 }
 2585:             }
 2586:         }
 2587:     } elsif ($env{'form.command'} eq 'release') {
 2588:         if ($env{'form.context'} eq 'usermanage') {
 2589:             $brcrum =[{href=>"/adm/slotrequest?command=manageresv",
 2590:                        text=>$crumb_titles{'showslots'}}];
 2591:             $title = 'Manage Reservations';
 2592:             if (ref($brcrum) eq 'ARRAY') {
 2593:                 push(@{$brcrum},{href=>"/adm/slotrequest?command=$env{'form.command'}",text=>$crumb_titles{$env{'form.command'}}});
 2594:             }
 2595:             
 2596:         }
 2597:     }
 2598:     &start_page($r,$title,$brcrum);
 2599: 
 2600:     if ($env{'form.command'} eq 'manageresv') {
 2601:         my $crstype = &Apache::loncommon::course_type();
 2602:         &manage_reservations($r,$crstype);
 2603:     } elsif ($env{'form.command'} eq 'showresv') {
 2604:         &show_reservations($r,$env{'form.uname'},$env{'form.udom'});
 2605:     } elsif ($env{'form.command'} eq 'showslots' && $vgr eq 'F') {
 2606: 	&show_table($r,$mgr);
 2607:     } elsif ($env{'form.command'} eq 'remove_registration' && $mgr eq 'F') {
 2608: 	&remove_registration($r);
 2609:     } elsif ($env{'form.command'} eq 'release' && $mgr eq 'F') {
 2610: 	if ($env{'form.entry'} eq 'remove all') {
 2611: 	    &release_all_slot($r,$mgr);
 2612: 	} else {
 2613: 	    &release_slot($r,undef,undef,undef,$mgr);
 2614: 	}
 2615:     } elsif ($env{'form.command'} eq 'delete' && $mgr eq 'F') {
 2616: 	&delete_slot($r);
 2617:     } elsif ($env{'form.command'} eq 'uploadstart' && $mgr eq 'F') {
 2618: 	&upload_start($r);
 2619:     } elsif ($env{'form.command'} eq 'csvuploadmap' && $mgr eq 'F') {
 2620: 	&csv_upload_map($r);
 2621:     } elsif ($env{'form.command'} eq 'csvuploadassign' && $mgr eq 'F') {
 2622: 	if ($env{'form.associate'} ne 'Reverse Association') {
 2623: 	    &csv_upload_assign($r,$mgr);
 2624: 	} else {
 2625: 	    if ( $env{'form.upfile_associate'} ne 'reverse' ) {
 2626: 		$env{'form.upfile_associate'} = 'reverse';
 2627: 	    } else {
 2628: 		$env{'form.upfile_associate'} = 'forward';
 2629: 	    }
 2630: 	    &csv_upload_map($r);
 2631: 	}
 2632:     } elsif ($env{'form.command'} eq 'slotlog' && $mgr eq 'F') {
 2633:         &show_reservations_log($r);
 2634:     } else {
 2635: 	my $symb=&unescape($env{'form.symb'});
 2636: 	if (!defined($symb)) {
 2637: 	    &fail($r,'not_valid');
 2638: 	    return OK;
 2639: 	}
 2640: 	my (undef,undef,$res)=&Apache::lonnet::decode_symb($symb);
 2641: 	my $useslots = &Apache::lonnet::EXT("resource.0.useslots",$symb);
 2642: 	if ($useslots ne 'resource' 
 2643: 	    && $useslots ne 'map' 
 2644: 	    && $useslots ne 'map_map') {
 2645: 	    &fail($r,'not_available');
 2646: 	    return OK;
 2647: 	}
 2648: 	$env{'request.symb'}=$symb;
 2649: 	my $type = ($res =~ /\.task$/) ? 'Task'
 2650: 	                               : 'problem';
 2651: 	my ($status) = &Apache::lonhomework::check_slot_access('0',$type);
 2652: 	if ($status eq 'CAN_ANSWER' ||
 2653: 	    $status eq 'NEEDS_CHECKIN' ||
 2654: 	    $status eq 'WAITING_FOR_GRADE') {
 2655: 	    &fail($r,'not_allowed');
 2656: 	    return OK;
 2657: 	}
 2658: 	if ($env{'form.requestattempt'}) {
 2659: 	    &show_choices($r,$symb);
 2660: 	} elsif ($env{'form.command'} eq 'release') {
 2661: 	    &release_slot($r,$symb);
 2662: 	} elsif ($env{'form.command'} eq 'get') {
 2663: 	    &get_slot($r,$symb);
 2664: 	} elsif ($env{'form.command'} eq 'change') {
 2665:             if ($env{'form.nochange'}) {
 2666:                 my $slot_name = $env{'form.releaseslot'};
 2667:                 my @slots = &check_for_reservation($symb,'allslots');
 2668:                 my $msg;
 2669:                 if (($slot_name ne '') && (grep(/^\Q$slot_name\E/,@slots))) { 
 2670:                      my %slot=&Apache::lonnet::get_slot($env{'form.releaseslot'});
 2671:                      my $description=&get_description($slot_name,\%slot);
 2672:                      $msg = '<span style="font-weight: bold;">'.
 2673:                             &mt('Unchanged reservation: [_1]',$description).'</span><br /><br />';
 2674:                      my $person = 
 2675:                          &Apache::loncommon::plainname($env{'user.name'},$env{'user.domain'});
 2676:                      my $subject = &mt('Reservation unchanged: [_1]',$description);
 2677:                      my $msgbody = &mt('No change to existing registration by [_1] for [_2].',$person,$description);
 2678:                      $msg .= &slot_change_messaging($slot{'reservationmsg'},$subject,$msgbody,'nochange');
 2679:                 } else {
 2680:                     $msg = '<span class="LC_warning">'.&mt('Reservation no longer reported as available.').'</span>';
 2681:                 }
 2682:                 $r->print($msg);
 2683:                 &return_link($r);
 2684: 	    } elsif (&get_slot($r,$symb,$env{'form.releaseslot'},1)) {
 2685: 		&release_slot($r,$symb,$env{'form.releaseslot'});
 2686: 	    }
 2687: 	} else {
 2688: 	    $r->print('<p>'.&mt('Unknown command: [_1]',$env{'form.command'}).'</p>');
 2689: 	}
 2690:     }
 2691:     &end_page($r);
 2692:     return OK;
 2693: }
 2694: 
 2695: 1;
 2696: __END__

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