Annotation of loncom/interface/slotrequest.pm, revision 1.2
1.1 albertel 1: # The LearningOnline Network with CAPA
2: # Handler for requesting to have slots added to a students record
3: #
1.2 ! albertel 4: # $Id: slotrequest.pm,v 1.1 2005/05/31 17:42:11 albertel Exp $
1.1 albertel 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:
38: sub fail {
39: my ($r,$code)=@_;
1.2 ! albertel 40: if ($code eq 'not_valid') {
! 41: $r->print('<p>'.&mt('Unable to understand what resource you wanted to sign up for.').'</p>'.$env{'form.symb'});
! 42:
! 43: }
! 44: $r->print('<p><a href="/adm/flip?postdata=return:">'.
! 45: &mt('Return to last resource').'</a></p>');
1.1 albertel 46: &end_page($r);
47: }
48:
49: sub start_page {
50: my ($r)=@_;
51: my $html=&Apache::lonxml::xmlbegin();
52: $r->print($html.'<head><title>'.
53: &mt('Request another Worktime').'</title></head>');
54: $r->print(&Apache::loncommon::bodytag('Requesting another Worktime'));
55: }
56:
57: sub end_page {
58: my ($r)=@_;
59: $r->print(&Apache::loncommon::endbodytag().'</html>');
60: }
61:
1.2 ! albertel 62: =pod
! 63:
! 64: slot_reservations db
! 65: - keys are
! 66: - slotname\0id -> value is an hashref of
! 67: name -> user@domain of holder
! 68: timestamp -> timestamp of reservation
! 69: symb -> symb of resource that it is reserved for
! 70:
! 71: =cut
! 72:
! 73: sub get_course {
! 74: (undef,my $courseid)=&Apache::lonxml::whichuser();
! 75: my $cdom=$env{'course.'.$courseid.'.domain'};
! 76: my $cnum=$env{'course.'.$courseid.'.num'};
! 77: return ($cnum,$cdom);
! 78: }
! 79:
! 80: sub get_reservation_ids {
! 81: my ($slot_name)=@_;
! 82:
! 83: my ($cnum,$cdom)=&get_course();
! 84:
! 85: my %consumed=&Apache::lonnet::dump('slot_reservations',$cdom,$cnum,
! 86: "^$slot_name\0");
! 87:
! 88: my ($tmp)=%consumed;
! 89: if ($tmp=~/^error: 2 / ) {
! 90: return 0;
! 91: }
! 92: return keys(%consumed);
! 93: }
! 94:
! 95: sub space_available {
! 96: my ($slot_name,$slot)=@_;
! 97: my $max=$slot->{'maxspace'};
! 98:
! 99: if (!defined($max)) { return 1; }
! 100:
! 101: my $consumed=scalar(&get_reservation_ids($slot_name));
! 102: if ($consumed < $max) {
! 103: return 1
! 104: }
! 105: return 0;
! 106: }
! 107:
! 108: sub make_reservation {
! 109: my ($slot_name,$slot,$symb)=@_;
! 110: my $max=$slot->{'maxspace'};
! 111:
! 112: if (!defined($max)) { return 1; }
! 113:
! 114: my (@ids)=&get_reservation_ids($slot_name);
! 115:
! 116: # FIXME we could end up having holes...
! 117: my $last=0;
! 118: foreach my $id (@ids) {
! 119: my $num=(split('\0',$id))[1];
! 120: if ($num > $last) { $last=$num; }
! 121: }
! 122:
! 123: my $wanted=$last+1;
! 124: if ($wanted >= $max) {
! 125: # full up
! 126: return -1;
! 127: }
! 128:
! 129: my %reservation=('name' => $env{'user.name'}.'@'.$env{'user.domain'},
! 130: 'timestamp' => time,
! 131: 'symb' => $symb);
! 132:
! 133: my ($cnum,$cdom)=&get_course();
! 134: my $success=&Apache::lonnet::newput('slot_reservations',
! 135: {"$slot_name\0$wanted" =>
! 136: \%reservation},
! 137: $cdom,$cnum);
! 138: if ($success eq 'ok') {
! 139: return $wanted;
! 140: }
! 141: # someone else got it
! 142: return -1;
! 143: }
! 144:
! 145:
! 146: sub show_choices {
! 147: my ($r,$symb)=@_;
! 148:
! 149: my ($cnum,$cdom)=&get_course();
! 150: my %slots=&Apache::lonnet::dump('slots',$cdom,$cnum);
! 151: $r->print('<table border="1">');
! 152: foreach my $slot (sort
! 153: { return $slots{$a}->{'starttime'} <=> $slots{$b}->{'starttime'} }
! 154: (keys(%slots))) {
! 155: my $description=$slots{$slot}->{'description'};
! 156: if (!defined($description)) {
! 157: $description=&mt('[_1] From [_2] to [_3]',$slot,
! 158: &Apache::lonlocal::locallocaltime($slots{$slot}->{'starttime'}),
! 159: &Apache::lonlocal::locallocaltime($slots{$slot}->{'endtime'}));
! 160: }
! 161:
! 162: my $form=&mt('Unavailable');
! 163: if (&space_available($slot,$slots{$slot})) {
! 164: $form=<<STUFF;
! 165: <form>
! 166: <input type="submit" name="Select" value="Select" />
! 167: <!-- FIXME needs to send data -->
! 168: </form>
! 169: STUFF
! 170: }
! 171: $r->print(<<STUFF);
! 172: <tr>
! 173: <td>$form</td>
! 174: <td>$description</td>
! 175: </tr>
! 176: STUFF
! 177: }
! 178: $r->print('</table>');
! 179: }
! 180:
1.1 albertel 181: sub handler {
182: my $r=shift;
183:
184: &start_page($r);
1.2 ! albertel 185: my $symb=&Apache::lonnet::unescape($env{'form.symb'});
1.1 albertel 186: my (undef,undef,$res)=&Apache::lonnet::decode_symb($symb);
1.2 ! albertel 187: if ($res !~ /\.task$/) {
1.1 albertel 188: &fail($r,'not_valid');
189: return OK;
190: }
1.2 ! albertel 191:
! 192: if ($env{'form.requestattempt'}) {
! 193: &show_choices($r,$symb);
! 194: }
1.1 albertel 195:
196: &end_page($r);
197: return OK;
198: }
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