Annotation of loncom/interface/slotrequest.pm, revision 1.3
1.1 albertel 1: # The LearningOnline Network with CAPA
2: # Handler for requesting to have slots added to a students record
3: #
1.3 ! albertel 4: # $Id: slotrequest.pm,v 1.2 2005/05/31 21:13:01 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 < $max) {
103: return 1
104: }
105: return 0;
106: }
1.3 ! albertel 107:
! 108: # FIXME - depends on the parameter for the resource to be correct
! 109: # tho prevent multiple reservations
! 110:
1.2 albertel 111: sub make_reservation {
112: my ($slot_name,$slot,$symb)=@_;
1.3 ! albertel 113:
! 114: my ($cnum,$cdom)=&get_course();
! 115:
! 116: my $value=&Apache::lonnet::EXT("resource.0.availablestudent",$symb,
! 117: $env{'user.domain'},$env{'user.name'});
! 118: &Apache::lonxml::debug("value is $value<br />");
! 119: foreach my $other_slot (split(/:/, $value)) {
! 120: if ($other_slot eq $slot_name) {
! 121: my %consumed=&Apache::lonnet::dump('slot_reservations', $cdom,
! 122: $cnum, "^$slot_name\0");
! 123:
! 124: my $me=$env{'user.name'}.'@'.$env{'user.domain'};
! 125: foreach my $key (keys(%consumed)) {
! 126: if ($consumed{$key}->{'name'} eq $me) {
! 127: my $num=(split('\0',$key))[1];
! 128: return -$num;
! 129: }
! 130: }
! 131: }
! 132: }
! 133:
1.2 albertel 134: my $max=$slot->{'maxspace'};
1.3 ! albertel 135: if (!defined($max)) { $max=99999; }
1.2 albertel 136:
137: my (@ids)=&get_reservation_ids($slot_name);
138:
139: # FIXME we could end up having holes...
140: my $last=0;
141: foreach my $id (@ids) {
142: my $num=(split('\0',$id))[1];
143: if ($num > $last) { $last=$num; }
144: }
145:
146: my $wanted=$last+1;
1.3 ! albertel 147: &Apache::lonxml::debug("wanted $wanted<br />");
1.2 albertel 148: if ($wanted >= $max) {
149: # full up
150: return -1;
151: }
152:
153: my %reservation=('name' => $env{'user.name'}.'@'.$env{'user.domain'},
154: 'timestamp' => time,
155: 'symb' => $symb);
156:
157: my $success=&Apache::lonnet::newput('slot_reservations',
158: {"$slot_name\0$wanted" =>
159: \%reservation},
1.3 ! albertel 160: $cdom, $cnum);
! 161:
1.2 albertel 162: if ($success eq 'ok') {
1.3 ! albertel 163: #FIXME need to set the parm
! 164: my $new_value=$slot_name;
! 165: if ($value) {
! 166: $new_value=$value.':'.$new_value;
! 167: }
! 168: my $result=&Apache::lonparmset::storeparm_by_symb($symb,
! 169: '0_availablestudent',
! 170: 1, $new_value, 'string',
! 171: $env{'user.name'},
! 172: $env{'user.domain'});
! 173: &Apache::lonxml::debug("hrrm $result");
1.2 albertel 174: return $wanted;
175: }
1.3 ! albertel 176:
1.2 albertel 177: # someone else got it
1.3 ! albertel 178: return undef;
! 179: }
! 180:
! 181: sub get_slot {
! 182: my ($r,$symb)=@_;
! 183:
! 184: my %slot=&Apache::lonnet::get_slot($env{'form.slotname'});
! 185: my $reserved=&make_reservation($env{'form.slotname'},
! 186: \%slot,$symb);
! 187: my $description=&get_description($env{'form.slotname'},\%slot);
! 188: if ($reserved > -1) {
! 189: $r->print("<p>Success: $description</p>");
! 190: $r->print('<p><a href="/adm/flip?postdata=return:">'.
! 191: &mt('Return to last resource').'</a></p>');
! 192: return;
! 193: } elsif ($reserved < 0) {
! 194: $r->print("<p>Already reserved: $description</p>");
! 195: $r->print('<p><a href="/adm/flip?postdata=return:">'.
! 196: &mt('Return to last resource').'</a></p>');
! 197: return;
! 198: }
! 199:
! 200: my %lt=('request'=>"Request another attempt",
! 201: 'try' =>'Try again');
! 202: %lt=&Apache::lonlocal::texthash(%lt);
! 203:
! 204: $r->print(<<STUFF);
! 205: <p> <font color="red">Failed</font> to reserve a spot for $description. </p>
! 206: <p>
! 207: <form method="POST" action="/adm/slotrequest">
! 208: <input type="submit" name="Try Again" value="$lt{'try'}" />
! 209: <input type="hidden" name="symb" value="$env{'form.symb'}" />
! 210: <input type="hidden" name="slotname" value="$env{'form.slotname'}" />
! 211: <input type="hidden" name="command" value="get" />
! 212: </form>
! 213: ?
! 214: </p>
! 215: <p>
! 216: or
! 217: <form method="POST" action="/adm/slotrequest">
! 218: <input type="hidden" name="symb" value="$env{'form.symb'}" />
! 219: <input type="submit" name="requestattempt" value="$lt{'request'}" />
! 220: </form>
! 221: </p>
! 222: or
! 223: STUFF
! 224: $r->print('<p><a href="/adm/flip?postdata=return:">'.
! 225: &mt('Return to last resource').'</a></p>');
! 226: return;
! 227: }
! 228:
! 229: sub allowed_slot {
! 230: my ($slot_name,$slot,$symb)=@_;
! 231: #already started
! 232: if ($slot->{'starttime'} < time) {
! 233: return 0;
! 234: }
! 235:
! 236: #already ended
! 237: if ($slot->{'endtime'} < time) {
! 238: return 0;
! 239: }
! 240:
! 241: # not allowed to pick this one
! 242: if (defined($slot->{'type'})
! 243: && $slot->{'type'} ne 'schedulable_student') {
! 244: return 0;
! 245: }
! 246:
! 247: # not allowed for this resource
! 248: if (defined($slot->{'symb'})
! 249: && $slot->{'symb'} ne $symb) {
! 250: return 0;
! 251: }
! 252:
! 253: return 1;
1.2 albertel 254: }
255:
1.3 ! albertel 256: sub get_description {
! 257: my ($slot_name,$slot)=@_;
! 258: my $description=$slot->{'description'};
! 259: if (!defined($description)) {
! 260: $description=&mt('[_1] From [_2] to [_3]',$slot,
! 261: &Apache::lonlocal::locallocaltime($slot->{'starttime'}),
! 262: &Apache::lonlocal::locallocaltime($slot->{'endtime'}));
! 263: }
! 264: return $description;
! 265: }
1.2 albertel 266:
267: sub show_choices {
268: my ($r,$symb)=@_;
269:
270: my ($cnum,$cdom)=&get_course();
271: my %slots=&Apache::lonnet::dump('slots',$cdom,$cnum);
1.3 ! albertel 272: my $available;
1.2 albertel 273: $r->print('<table border="1">');
274: foreach my $slot (sort
275: { return $slots{$a}->{'starttime'} <=> $slots{$b}->{'starttime'} }
276: (keys(%slots))) {
1.3 ! albertel 277:
! 278: next if (!&allowed_slot($slot,$slots{$slot}));
! 279:
! 280: $available++;
! 281:
! 282: my $description=&get_description($slot,$slots{$slot});
1.2 albertel 283:
284: my $form=&mt('Unavailable');
1.3 ! albertel 285: if (&space_available($slot,$slots{$slot},$symb)) {
! 286: my $escsymb=&Apache::lonnet::escape($symb);
1.2 albertel 287: $form=<<STUFF;
1.3 ! albertel 288: <form method="POST" action="/adm/slotrequest">
1.2 albertel 289: <input type="submit" name="Select" value="Select" />
1.3 ! albertel 290: <input type="hidden" name="symb" value="$escsymb" />
! 291: <input type="hidden" name="slotname" value="$slot" />
! 292: <input type="hidden" name="command" value="get" />
1.2 albertel 293: </form>
294: STUFF
295: }
296: $r->print(<<STUFF);
297: <tr>
298: <td>$form</td>
299: <td>$description</td>
300: </tr>
301: STUFF
302: }
1.3 ! albertel 303:
! 304: if (!$available) {
! 305: $r->print('<tr><td>No avaliable times. <a href="/adm/flip?postdata=return:">'.
! 306: &mt('Return to last resource').'</a></td></tr>');
! 307: }
1.2 albertel 308: $r->print('</table>');
309: }
310:
1.1 albertel 311: sub handler {
312: my $r=shift;
313:
314: &start_page($r);
1.2 albertel 315: my $symb=&Apache::lonnet::unescape($env{'form.symb'});
1.1 albertel 316: my (undef,undef,$res)=&Apache::lonnet::decode_symb($symb);
1.2 albertel 317: if ($res !~ /\.task$/) {
1.1 albertel 318: &fail($r,'not_valid');
319: return OK;
320: }
1.2 albertel 321:
322: if ($env{'form.requestattempt'}) {
323: &show_choices($r,$symb);
1.3 ! albertel 324: } elsif ($env{'form.command'} eq 'get') {
! 325: &get_slot($r,$symb);
1.2 albertel 326: }
1.1 albertel 327: &end_page($r);
328: return OK;
329: }
1.3 ! albertel 330:
! 331: 1;
! 332: __END__
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