[BACK]Return to slotrequest.pm CVS log [TXT] [DIR] Up to [LON-CAPA] / loncom / interface
File:  [LON-CAPA] / loncom / interface / slotrequest.pm
Revision 1.18: download - view: text, annotated - select for diffs
Tue Sep 13 08:12:03 2005 UTC (18 years, 7 months ago) by albertel
Branches: MAIN
CVS tags: version_2_0_X, version_2_0_2, HEAD
- need to pass mgr around a bit more

# The LearningOnline Network with CAPA
# Handler for requesting to have slots added to a students record
#
# $Id: slotrequest.pm,v 1.18 2005/09/13 08:12:03 albertel Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#
###

package Apache::slotrequest;

use strict;
use Apache::Constants qw(:common :http :methods);
use Apache::loncommon();
use Apache::lonlocal;
use Apache::lonnet;
use Date::Manip;

sub fail {
    my ($r,$code)=@_;
    if ($code eq 'not_valid') {
	$r->print('<p>'.&mt('Unable to understand what resource you wanted to sign up for.').'</p>');

    } elsif ($code eq 'not_allowed') {
	$r->print('<p>'.&mt('Not allowed to sign up or change reservations at this time.').'</p>');
    } else {
	$r->print('<p>'.&mt('Failed.').'</p>');
    }
    
    $r->print('<p><a href="/adm/flip?postdata=return:">'.
	      &mt('Return to last resource').'</a></p>');
    &end_page($r);
}

sub start_page {
    my ($r)=@_;
    my $html=&Apache::lonxml::xmlbegin();
    $r->print($html.'<head><title>'.
	      &mt('Request another Worktime').'</title></head>');
    $r->print(&Apache::loncommon::bodytag('Requesting another Worktime'));
}

sub end_page {
    my ($r)=@_;
    $r->print(&Apache::loncommon::endbodytag().'</html>');
}

=pod

 slot_reservations db
   - keys are 
    - slotname\0id -> value is an hashref of
                         name -> user@domain of holder
                         timestamp -> timestamp of reservation
                         symb -> symb of resource that it is reserved for

=cut

sub get_course {
    (undef,my $courseid)=&Apache::lonxml::whichuser();
    my $cdom=$env{'course.'.$courseid.'.domain'};
    my $cnum=$env{'course.'.$courseid.'.num'};
    return ($cnum,$cdom);
}

sub get_reservation_ids {
    my ($slot_name)=@_;
    
    my ($cnum,$cdom)=&get_course();

    my %consumed=&Apache::lonnet::dump('slot_reservations',$cdom,$cnum,
				       "^$slot_name\0");
    
    my ($tmp)=%consumed;
    if ($tmp=~/^error: 2 / ) {
	return 0;
    }
    return keys(%consumed);
}

sub space_available {
    my ($slot_name,$slot)=@_;
    my $max=$slot->{'maxspace'};

    if (!defined($max)) { return 1; }

    my $consumed=scalar(&get_reservation_ids($slot_name));
    if ($consumed < $max) {
	return 1
    }
    return 0;
}

sub check_for_reservation {
    my ($symb)=@_;
    my $student = &Apache::lonnet::EXT("resource.0.availablestudent", $symb,
				       $env{'user.domain'}, $env{'user.name'});

    my $course = &Apache::lonnet::EXT("resource.0.available", $symb,
				    $env{'user.domain'}, $env{'user.name'});
    my @slots = (split(/:/,$student), split(/:/, $course));

    &Apache::lonxml::debug(" slot list is ".join(':',@slots));

    my ($cnum,$cdom)=&get_course();
    my %slots=&Apache::lonnet::get('slots', [@slots], $cdom, $cnum);

    foreach my $slot_name (@slots) {
	next if (!defined($slots{$slot_name}) ||
		 !ref($slots{$slot_name}));
	&Apache::lonxml::debug(time." $slot_name ".
			       $slots{$slot_name}->{'starttime'}." -- ".
			       $slots{$slot_name}->{'startreserve'});
	if ($slots{$slot_name}->{'endtime'} > time &&
	    $slots{$slot_name}->{'startreserve'} < time) {
	    # between start of reservation times and end of slot
	    return($slot_name, $slots{$slot_name});
	}
    }
    return (undef,undef);
}

sub check_for_conflict {
    my ($symb,$new_slot_name)=@_;
    my $student = &Apache::lonnet::EXT("resource.0.availablestudent", $symb,
				       $env{'user.domain'}, $env{'user.name'});
    my $course = &Apache::lonnet::EXT("resource.0.available", $symb,
				      $env{'user.domain'}, $env{'user.name'});
    my @slots = (split(/:/,$student), split(/:/, $course));
    my ($cnum,$cdom)=&get_course();
    my %slots=&Apache::lonnet::get('slots', [@slots], $cdom, $cnum);
    foreach my $slot_name (@slots) {
	next if (!defined($slots{$slot_name}) ||
		 !ref($slots{$slot_name}));

        next if (!defined($slots{$slot_name}->{'uniqueperiod'}) ||
		 !ref($slots{$slot_name}->{'uniqueperiod'}));
	my ($start,$end)=@{$slots{$slot_name}->{'uniqueperiod'}};
	if ($start<time && time < $end) {
	    return $slot_name;
	}
    }
    return undef;

}

sub make_reservation {
    my ($slot_name,$slot,$symb)=@_;

    my ($cnum,$cdom)=&get_course();

    my $value=&Apache::lonnet::EXT("resource.0.availablestudent",$symb,
				   $env{'user.domain'},$env{'user.name'});
    &Apache::lonxml::debug("value is  $value<br />");
    foreach my $other_slot (split(/:/, $value)) {
	if ($other_slot eq $slot_name) {
	    my %consumed=&Apache::lonnet::dump('slot_reservations', $cdom,
					       $cnum, "^$slot_name\0");   

	    my $me=$env{'user.name'}.'@'.$env{'user.domain'};
	    foreach my $key (keys(%consumed)) {
		if ($consumed{$key}->{'name'} eq $me) {
		    my $num=(split('\0',$key))[1];
		    return -$num;
		}
	    }
	}
    }

    my $max=$slot->{'maxspace'};
    if (!defined($max)) { $max=99999; }

    my (@ids)=&get_reservation_ids($slot_name);

    my $last=0;
    foreach my $id (@ids) {
	my $num=(split('\0',$id))[1];
	if ($num > $last) { $last=$num; }
    }
    
    my $wanted=$last+1;
    &Apache::lonxml::debug("wanted $wanted<br />");
    if (scalar(@ids) >= $max) {
	# full up
	return undef;
    }
    
    my %reservation=('name'      => $env{'user.name'}.'@'.$env{'user.domain'},
		     'timestamp' => time,
		     'symb'      => $symb);

    my $success=&Apache::lonnet::newput('slot_reservations',
					{"$slot_name\0$wanted" =>
					     \%reservation},
					$cdom, $cnum);

    if ($success eq 'ok') {
	my $new_value=$slot_name;
	if ($value) {
	    $new_value=$value.':'.$new_value;
	}
	my $result=&Apache::lonparmset::storeparm_by_symb($symb,
						      '0_availablestudent',
						       1, $new_value, 'string',
						       $env{'user.name'},
					               $env{'user.domain'});
	&Apache::lonxml::debug("hrrm $result");
	return $wanted;
    }

    # someone else got it
    return undef;
}

sub release_slot {
    my ($r,$symb,$slot_name,$inhibit_return_link)=@_;

    if ($slot_name eq '') { $slot_name=$env{'form.slotname'}; }
    my ($cnum,$cdom)=&get_course();

    # get parameter string, check for existance, rebuild string with the slot
				       
    my @slots = split(/:/,&Apache::lonnet::EXT("resource.0.availablestudent",
					       $symb,$env{'user.domain'},
					       $env{'user.name'}));
    my @new_slots;
    foreach my $exist_slot (@slots) {
	if ($exist_slot eq $slot_name) { next; }
	push(@new_slots,$exist_slot);
    }
    my $new_param = join(':',@new_slots);

    # get slot reservations, check if user has one, if so remove reservation
    my %consumed=&Apache::lonnet::dump('slot_reservations',$cdom,$cnum,
				       "^$slot_name\0");
    foreach my $entry (keys(%consumed)) {
	if ( $consumed{$entry}->{'name'} eq 
	     ($env{'user.name'}.'@'.$env{'user.domain'}) ) {
	    &Apache::lonnet::del('slot_reservations',[$entry],
				 $cdom,$cnum);
	}
    }
    # store new parameter string
    my $result=&Apache::lonparmset::storeparm_by_symb($symb,
						      '0_availablestudent',
						      1, $new_param, 'string',
						      $env{'user.name'},
						      $env{'user.domain'});
    my %slot=&Apache::lonnet::get_slot($slot_name);
    my $description=&get_description($env{'form.slotname'},\%slot);
    $r->print("<p>Released Reservation: $description</p>");
    if (!$inhibit_return_link) {
	$r->print('<p><a href="/adm/flip?postdata=return:">'.
		  &mt('Return to last resource').'</a></p>');
    }
    return 1;
}

sub get_slot {
    my ($r,$symb)=@_;

    my $slot_name=&check_for_conflict($symb,$env{'form.slotname'});
    if ($slot_name) {
	my %slot=&Apache::lonnet::get_slot($slot_name);
	my $description1=&get_description($slot_name,\%slot);
	%slot=&Apache::lonnet::get_slot($env{'form.slotname'});
	my $description2=&get_description($env{'form.slotname'},\%slot);
	$r->print("<p>Already have a reservation: $description1</p>");
	if ($slot_name ne $env{'form.slotname'}) {
	    $r->print(<<STUFF);
<form method="POST" action="/adm/slotrequest">
   <input type="hidden" name="symb" value="$env{'form.symb'}" />
   <input type="hidden" name="slotname" value="$env{'form.slotname'}" />
   <input type="hidden" name="releaseslot" value="$slot_name" />
   <input type="hidden" name="command" value="change" />
STUFF
            $r->print("<p>You can either ");
	    $r->print(<<STUFF);
   <input type="submit" name="change" value="Change" />
STUFF
	    $r->print(' your reservation from <b>'.$description1.'</b> to <b>'.
		      $description2.
		      '</b> <br />or <a href="/adm/flip?postdata=return:">'.
		      &mt('Return to last resource').'</a></p>');
	    $r->print(<<STUFF);
</form>
STUFF
        } else {
	    $r->print('<p><a href="/adm/flip?postdata=return:">'.
		      &mt('Return to last resource').'</a></p>');
	}
	return;
    }
    my %slot=&Apache::lonnet::get_slot($env{'form.slotname'});
    my $reserved=&make_reservation($env{'form.slotname'},
				   \%slot,$symb);
    my $description=&get_description($env{'form.slotname'},\%slot);
    if (defined($reserved)) {
	if ($reserved > -1) {
	    $r->print("<p>Success: $description</p>");
	    $r->print('<p><a href="/adm/flip?postdata=return:">'.
		      &mt('Return to last resource').'</a></p>');
	    return;
	} elsif ($reserved < 0) {
	    $r->print("<p>Already reserved: $description</p>");
	    $r->print('<p><a href="/adm/flip?postdata=return:">'.
		      &mt('Return to last resource').'</a></p>');
	    return;
	}
    }

    my %lt=('request'=>"Availibility list",
	    'try'    =>'Try again');
    %lt=&Apache::lonlocal::texthash(%lt);

    $r->print(<<STUFF);
<p> <font color="red">Failed</font> to reserve a spot for $description. </p>
<p>
<form method="POST" action="/adm/slotrequest">
   <input type="submit" name="Try Again" value="$lt{'try'}" />
   <input type="hidden" name="symb" value="$env{'form.symb'}" />
   <input type="hidden" name="slotname" value="$env{'form.slotname'}" />
   <input type="hidden" name="command" value="get" />
</form>
?
</p>
<p>
or
<form method="POST" action="/adm/slotrequest">
    <input type="hidden" name="symb" value="$env{'form.symb'}" />
    <input type="submit" name="requestattempt" value="$lt{'request'}" />
</form>
</p>
or
STUFF
    $r->print('<p><a href="/adm/flip?postdata=return:">'.
	      &mt('Return to last resource').'</a></p>');
    return;
}

sub allowed_slot {
    my ($slot_name,$slot,$symb)=@_;
    #already started
    if ($slot->{'starttime'} < time) {
	# all open slot to be schedulable
	#return 0;
    }
    &Apache::lonxml::debug("$slot_name starttime good");
    #already ended
    if ($slot->{'endtime'} < time) {
	return 0;
    }
    &Apache::lonxml::debug("$slot_name endtime good");
    # not allowed to pick this one
    if (defined($slot->{'type'})
	&& $slot->{'type'} ne 'schedulable_student') {
	return 0;
    }
    &Apache::lonxml::debug("$slot_name type good");
    # not allowed for this resource
    if (defined($slot->{'symb'})
	&& $slot->{'symb'} ne $symb) {
	return 0;
    }
    &Apache::lonxml::debug("$slot_name symb good");
    return 1;
}

sub get_description {
    my ($slot_name,$slot)=@_;
    my $description=$slot->{'description'};
    if (!defined($description)) {
	$description=&mt('[_1] From [_2] to [_3]',$slot_name,
			 &Apache::lonlocal::locallocaltime($slot->{'starttime'}),
			 &Apache::lonlocal::locallocaltime($slot->{'endtime'}));
    }
    return $description;
}

sub show_choices {
    my ($r,$symb)=@_;

    my ($cnum,$cdom)=&get_course();
    my %slots=&Apache::lonnet::dump('slots',$cdom,$cnum);
    my $available;
    $r->print('<table border="1">');
    &Apache::lonxml::debug("Checking Slots");
    my ($got_slot)=&check_for_reservation($symb);
    foreach my $slot (sort 
		      { return $slots{$a}->{'starttime'} <=> $slots{$b}->{'starttime'} }
		      (keys(%slots)))  {

	&Apache::lonxml::debug("Checking Slot $slot");
	next if (!&allowed_slot($slot,$slots{$slot}));

	$available++;

	my $description=&get_description($slot,$slots{$slot});

	my $form=&mt('Unavailable');
	if (($slot eq $got_slot) ||
	    &space_available($slot,$slots{$slot},$symb)) {
	    my $text=&mt('Select');
	    my $command='get';
	    if ($slot eq $got_slot) {
		$text=&mt('Free Reservation');
		$command='release';
	    }
	    my $escsymb=&Apache::lonnet::escape($symb);
	    $form=<<STUFF;
   <form method="POST" action="/adm/slotrequest">
     <input type="submit" name="Select" value="$text" />
     <input type="hidden" name="symb" value="$escsymb" />
     <input type="hidden" name="slotname" value="$slot" />
     <input type="hidden" name="command" value="$command" />
   </form>
STUFF
	}
	$r->print(<<STUFF);
<tr>
 <td>$form</td>
 <td>$description</td>
</tr>
STUFF
    }

    if (!$available) {
	$r->print('<tr><td>No available times. <a href="/adm/flip?postdata=return:">'.
		  &mt('Return to last resource').'</a></td></tr>');
    }
    $r->print('</table>');
}

sub show_table {
    my ($r,$symb,$mgr)=@_;

    my ($cnum,$cdom)=&get_course();
    my %slots=&Apache::lonnet::dump('slots',$cdom,$cnum);
    my $available;
    if ($mgr eq 'F') {
	$r->print('<form method="POST" action="/adm/slotrequest">
<input type="hidden" name="command" value="uploadstart" />
<input type="hidden" name="symb" value="'.$env{'form.symb'}.'" />
<input type="submit" name="start" value="'.&mt('Upload Slot List').'" />
</form>');
    }
    $r->print('<table border="1">
<tr>
  <th>Slot name</th>
  <th>Type</th>
  <th>Description</th>
  <th>Start Time</th>
  <th>End Time</th>
  <th>Max space</th>
  <th>Scheduled Students</th>
  <th>Proctors</th>
  <th>Unique Period</th>
</tr>');
    foreach my $slot (sort 
		      { return $slots{$a}->{'starttime'} <=> $slots{$b}->{'starttime'} }
		      (keys(%slots)))  {
	if (defined($slots{$slot}->{'type'})
	    && $slots{$slot}->{'type'} ne 'schedulable_student') {
	    #next;
	}
	my $description=&get_description($slot,$slots{$slot});
	my %consumed=&Apache::lonnet::dump('slot_reservations',$cdom,$cnum,
					   "^$slot\0");
	my $ids;
	foreach my $entry (sort(keys(%consumed))) {
	    my (undef,$id)=split("\0",$entry);
	    $ids.= $id.'-> '.$consumed{$entry}->{'name'}.'<br />';
	}
	my $start=localtime($slots{$slot}->{'starttime'});
	my $end=localtime($slots{$slot}->{'endtime'});
	my $unique;
	if (ref($slots{$slot}{'uniqueperiod'})) {
	    $unique=localtime($slots{$slot}{'uniqueperiod'}[0]).','.
		localtime($slots{$slot}{'uniqueperiod'}[1]);
	}

	$r->print(<<STUFF);
<tr>
 <td>$slot</td>
 <td>$slots{$slot}->{'type'}</td>
 <td>$description</td>
 <td>$start</td>
 <td>$end</td>
 <td>$slots{$slot}->{'maxspace'}</td>
 <td>$ids</td>
 <td>$slots{$slot}->{'proctor'}</td>
 <td>$unique</td>
</tr>
STUFF
    }
    $r->print('</table>');
}

sub upload_start {
    my ($r,$symb)=@_;    
    $r->print(&Apache::grades::checkforfile_js());
    my $result.='<table width=100% border=0><tr bgcolor="#e6ffff"><td>'."\n";
    $result.='&nbsp;<b>'.
	&mt('Specify a file containing the slot definitions.').
	'</b></td></tr>'."\n";
    $result.='<tr bgcolor=#ffffe6><td>'."\n";
    my $upfile_select=&Apache::loncommon::upfile_select_html();
    my $ignore=&mt('Ignore First Line');
    $result.=<<ENDUPFORM;
<form method="post" enctype="multipart/form-data" action="/adm/slotrequest" name="slotupload">
<input type="hidden" name="symb" value="$symb" />
<input type="hidden" name="command" value="csvuploadmap" />
$upfile_select
<br /><input type="button" onClick="javascript:checkUpload(this.form);" value="Upload Data" />
<label><input type="checkbox" name="noFirstLine" />$ignore</label>
</form>
ENDUPFORM
    $result.='</td></tr></table>'."\n";
    $result.='</td></tr></table>'."\n";
    $r->print($result);
}

sub csvuploadmap_header {
    my ($r,$symb,$datatoken,$distotal)= @_;
    my $javascript;
    if ($env{'form.upfile_associate'} eq 'reverse') {
	$javascript=&csvupload_javascript_reverse_associate();
    } else {
	$javascript=&csvupload_javascript_forward_associate();
    }

    my $checked=(($env{'form.noFirstLine'})?' checked="checked"':'');
    my $ignore=&mt('Ignore First Line');
    $r->print(<<ENDPICK);
<form method="post" enctype="multipart/form-data" action="/adm/slotrequest" name="slotupload">
<h3>Identify fields</h3>
Total number of records found in file: $distotal <hr />
Enter as many fields as you can. The system will inform you and bring you back
to this page if the data selected is insufficient to create the slots.<hr />
<input type="button" value="Reverse Association" onClick="javascript:this.form.associate.value='Reverse Association';submit(this.form);" />
<label><input type="checkbox" name="noFirstLine" $checked />$ignore</label>
<input type="hidden" name="associate"  value="" />
<input type="hidden" name="datatoken"  value="$datatoken" />
<input type="hidden" name="fileupload" value="$env{'form.fileupload'}" />
<input type="hidden" name="upfiletype" value="$env{'form.upfiletype'}" />
<input type="hidden" name="upfile_associate" 
                                       value="$env{'form.upfile_associate'}" />
<input type="hidden" name="symb"       value="$symb" />
<input type="hidden" name="command"    value="csvuploadassign" />
<hr />
<script type="text/javascript" language="Javascript">
$javascript
</script>
ENDPICK
    return '';

}

sub csvuploadmap_footer {
    my ($request,$i,$keyfields) =@_;
    $request->print(<<ENDPICK);
</table>
<input type="hidden" name="nfields" value="$i" />
<input type="hidden" name="keyfields" value="$keyfields" />
<input type="button" onClick="javascript:verify(this.form)" value="Create Slots" /><br />
</form>
ENDPICK
}

sub csvupload_javascript_reverse_associate {
    my $error1=&mt('You need to specify the name, starttime, endtime and a type');
    return(<<ENDPICK);
  function verify(vf) {
    var foundstart=0;
    var foundend=0;
    var foundname=0;
    var foundtype=0;
    for (i=0;i<=vf.nfields.value;i++) {
      tw=eval('vf.f'+i+'.selectedIndex');
      if (i==0 && tw!=0) { foundname=1; }
      if (i==1 && tw!=0) { foundtype=1; }
      if (i==2 && tw!=0) { foundstat=1; }
      if (i==3 && tw!=0) { foundend=1; }
    }
    if (foundstart==0 && foundend==0 && foundtype==0 && foundname==0) {
	alert('$error1');
	return;
    }
    vf.submit();
  }
  function flip(vf,tf) {
  }
ENDPICK
}

sub csvupload_javascript_forward_associate {
    my $error1=&mt('You need to specify the name, starttime, endtime and a type');
  return(<<ENDPICK);
  function verify(vf) {
    var foundstart=0;
    var foundend=0;
    var foundname=0;
    var foundtype=0;
    for (i=0;i<=vf.nfields.value;i++) {
      tw=eval('vf.f'+i+'.selectedIndex');
      if (tw==1) { foundname=1; }
      if (tw==2) { foundtype=1; }
      if (tw==3) { foundstat=1; }
      if (tw==4) { foundend=1; }
    }
    if (foundstart==0 && foundend==0 && foundtype==0 && foundname==0) {
	alert('$error1');
	return;
    }
    vf.submit();
  }
  function flip(vf,tf) {
  }
ENDPICK
}

sub csv_upload_map {
    my ($r,$symb)= @_;

    my $datatoken;
    if (!$env{'form.datatoken'}) {
	$datatoken=&Apache::loncommon::upfile_store($r);
    } else {
	$datatoken=$env{'form.datatoken'};
	&Apache::loncommon::load_tmp_file($r);
    }
    my @records=&Apache::loncommon::upfile_record_sep();
    if ($env{'form.noFirstLine'}) { shift(@records); }
    &csvuploadmap_header($r,$symb,$datatoken,$#records+1);
    my ($i,$keyfields);
    if (@records) {
	my @fields=&csvupload_fields();

	if ($env{'form.upfile_associate'} eq 'reverse') {	
	    &Apache::loncommon::csv_print_samples($r,\@records);
	    $i=&Apache::loncommon::csv_print_select_table($r,\@records,
							  \@fields);
	    foreach (@fields) { $keyfields.=$_->[0].','; }
	    chop($keyfields);
	} else {
	    unshift(@fields,['none','']);
	    $i=&Apache::loncommon::csv_samples_select_table($r,\@records,
							    \@fields);
	    my %sone=&Apache::loncommon::record_sep($records[0]);
	    $keyfields=join(',',sort(keys(%sone)));
	}
    }
    &csvuploadmap_footer($r,$i,$keyfields);

    return '';
}

sub csvupload_fields {
    return (['name','Slot name'],
	    ['type','Type of slot'],
	    ['starttime','Start Time of slot'],
	    ['endtime','End Time of slot'],
	    ['startreserve','Reservation Start Time'],
	    ['ip','IP or DNS restriction'],
	    ['proctor','List of proctor ids'],
	    ['description','Slot Description'],
	    ['maxspace','Maximum number of reservations'],
	    ['symb','Resource Restriction'],
	    ['uniqueperiod','Date range of slot exclusion'],
	    ['secret','Secret word proctor uses to validate']);
}

sub csv_upload_assign {
    my ($r,$symb,$mgr)= @_;
    &Apache::loncommon::load_tmp_file($r);
    my @slotdata = &Apache::loncommon::upfile_record_sep();
    if ($env{'form.noFirstLine'}) { shift(@slotdata); }
    my %fields=&Apache::grades::get_fields();
    $r->print('<h3>Creating Slots</h3>');
    my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
    my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
    my $countdone=0;
    foreach my $slot (@slotdata) {
	my %slot;
	my %entries=&Apache::loncommon::record_sep($slot);
	my $domain;
	my $name=$entries{$fields{'name'}};
	if ($entries{$fields{'type'}}) {
	    $slot{'type'}=$entries{$fields{'type'}};
	} else {
	    $slot{'type'}='preassigned';
	}
	if ($entries{$fields{'starttime'}}) {
	    $slot{'starttime'}=&UnixDate($entries{$fields{'starttime'}},"%s");
	}
	if ($entries{$fields{'endtime'}}) {
	    $slot{'endtime'}=&UnixDate($entries{$fields{'endtime'}},"%s");
	}
	foreach my $key ('ip','proctor','description','maxspace',
			 'secret','symb') {
	    if ($entries{$fields{$key}}) {
		$slot{$key}=$entries{$fields{$key}};
	    }
	}
	if ($entries{$fields{'uniqueperiod'}}) {
	    my ($start,$end)=split(',',$entries{$fields{'uniqueperiod'}});
	    my @times=(&UnixDate($start,"%s"),
		       &UnixDate($end,"%s"));
	    $slot{'uniqueperiod'}=\@times;
	}

	&Apache::lonnet::cput('slots',{$name=>\%slot},$cdom,$cname);
	$r->print('.');
	$r->rflush();
	$countdone++;
    }
    $r->print("<br />Created $countdone slots\n");
    $r->print("<br />\n");
    &show_table($r,$symb,$mgr);
    return '';
}

sub handler {
    my $r=shift;

    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'});
    &start_page($r);
    my $symb=&Apache::lonnet::unescape($env{'form.symb'});
    my (undef,undef,$res)=&Apache::lonnet::decode_symb($symb);
    if ($res !~ /\.task$/) {
	&fail($r,'not_valid');
	return OK;
    }
    $env{'request.symb'}=$symb;
    my $vgr=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
    my $mgr=&Apache::lonnet::allowed('mgr',$env{'request.course.id'});
    if ($env{'form.command'} eq 'showslots' && $vgr eq 'F') {
	&show_table($r,$symb,$mgr);
    } elsif ($env{'form.command'} eq 'uploadstart' && $mgr eq 'F') {
	&upload_start($r,$symb);
    } elsif ($env{'form.command'} eq 'csvuploadmap' && $mgr eq 'F') {
	&csv_upload_map($r,$symb);
    } elsif ($env{'form.command'} eq 'csvuploadassign' && $mgr eq 'F') {
	if ($env{'form.associate'} ne 'Reverse Association') {
	    &csv_upload_assign($r,$symb,$mgr);
	} else {
	    if ( $env{'form.upfile_associate'} ne 'reverse' ) {
		$env{'form.upfile_associate'} = 'reverse';
	    } else {
		$env{'form.upfile_associate'} = 'forward';
	    }
	    &csv_upload_map($r,$symb);
	}
    } else {
	my ($status) = &Apache::lonhomework::check_task_access('0');
	if ($status eq 'CAN_ANSWER' ||
	    $status eq 'NEEDS_CHECKIN' ||
	    $status eq 'WAITING_FOR_GRADE') {
	    &fail($r,'not_allowed');
	    return OK;
	}
	if ($env{'form.requestattempt'}) {
	    &show_choices($r,$symb);
	} elsif ($env{'form.command'} eq 'release') {
	    &release_slot($r,$symb);
	} elsif ($env{'form.command'} eq 'get') {
	    &get_slot($r,$symb);
	} elsif ($env{'form.command'} eq 'change') {
	    &release_slot($r,$symb,$env{'form.releaseslot'},1);
	    &get_slot($r,$symb);
	} else {
	    $r->print("<p>Unknown command: ".$env{'form.command'}."</p>");
	}
    }
    &end_page($r);
    return OK;
}

1;
__END__
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