1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: bridgetask.pm,v 1.7 2005/03/31 16:05:13 albertel 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:
31: package Apache::bridgetask;
32:
33: use strict;
34: use Apache::lonnet;
35: use Apache::File();
36: use Apache::lonmenu;
37: use Apache::lonlocal;
38: use Apache::lonxml;
39: use Time::HiRes qw( gettimeofday tv_interval );
40: BEGIN {
41: &Apache::lonxml::register('Apache::bridgetask',('Task','IntroParagraph','Dimension','Instance','InstanceText','Criteria','ClosingParagraph'));
42: }
43:
44: sub proctor_check_auth {
45: my ($slot)=@_;
46: my $user=$ENV{'form.proctorname'};
47: my $domain=$ENV{'form.proctordomain'};
48:
49: my @allowed=split(",",$slot->{'proctor'});
50: foreach my $possible (@allowed) {
51: my ($puser,$pdom)=(split('@',$possible));
52: if ($puser eq $user && $pdom eq $domain) {
53: my $authhost=&Apache::lonnet::authenticate($puser,$ENV{'form.proctorpassword'},$pdom);
54: if ($authhost ne 'no_host') {
55: $Apache::lonhomework::results{'resource.checkedin'}=
56: $user.'@'.$domain;
57: return 1;
58: }
59: }
60: }
61: return 0;
62: }
63:
64: sub start_Task {
65: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
66:
67: &Apache::structuretags::initialize_storage();
68: &Apache::lonhomework::showhash(%Apache::lonhomework::history);
69:
70: my ($status,$accessmsg,$slot);
71: $Apache::lonhomework::parsing_a_task=1;
72: #should get back a <html> or the neccesary stuff to start XML/MathML
73: my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
74: &Apache::structuretags::page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
75:
76: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
77: $target eq 'tex') {
78: ($status,$accessmsg,$slot) =
79: &Apache::lonhomework::check_task_access('0');
80: push (@Apache::inputtags::status,$status);
81: my $expression='$external::datestatus="'.$status.'";';
82: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
83: &Apache::run::run($expression,$safeeval);
84: &Apache::lonxml::debug("Got $status");
85: if (( $status eq 'CLOSED' ) ||
86: ( $status eq 'BANNED') ||
87: ( $status eq 'UNAVAILABLE') ||
88: ( $status eq 'NOT_IN_A_SLOT') ||
89: ( $status eq 'NEEDS_CHECKIN') ||
90: ( $status eq 'INVALID_ACCESS')) {
91: my $bodytext=&Apache::lonxml::get_all_text("/task",$parser);
92: if ( $target eq "web" ) {
93: $result.= $head_tag_start.'</head>'.$body_tag_start;
94: my $msg;
95: if ($status eq 'UNAVAILABLE') {
96: $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
97: } elsif ($status eq 'NOT_IN_A_SLOT') {
98: $msg.='<h1>'.&mt('You are not currently signed up to work at this time and/or place.').'</h1>';
99: } elsif ($status eq 'NEEDS_CHECKIN') {
100: $msg.='<h1>'.&mt('You need the Proctor to validate you.').
101: '</h1>'.&proctor_validation_screen($slot);
102: } elsif ($status ne 'NOT_YET_VIEWED') {
103: $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
104: }
105: if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
106: $msg.='The problem '.$accessmsg;
107: }
108: $result.=$msg.'<br />';
109: } elsif ($target eq 'tex') {
110: $result.='\begin{document}\noindent \vskip 1 mm \begin{minipage}{\textwidth}\vskip 0 mm';
111: if ($status eq 'UNAVAILABLE') {
112: $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
113: } else {
114: $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
115: }
116: } elsif ($target eq 'grade') {
117: if ($status eq 'NEEDS_CHECKIN') {
118: if (&proctor_check_auth($slot)) {
119: #FIXME immeadiatly add this to the grading queue
120: # with slot->{'endtime'} for when grading can
121: # begin on this resource
122: }
123: }
124: }
125: } elsif ($target eq 'web') {
126: my $name= &Apache::structuretags::get_resource_name($parstack,$safeeval);
127: $result.="$head_tag_start<title>$name</title></head>
128: $body_tag_start \n $form_tag_start".
129: '<input type="hidden" name="submitted" value="yes" />';
130: # if we are viewing someone else preserve that info
131: if (defined $ENV{'form.grade_symb'}) {
132: foreach my $field ('symb','courseid','domain','username') {
133: $result .= '<input type="hidden" name="grade_'.$field.
134: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
135: }
136: }
137: }
138: } else {
139: # page_start returned a starting result, delete it if we don't need it
140: $result = '';
141: }
142: return $result;
143: }
144:
145: sub end_Task {
146: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
147: my $result='';
148: my $status=$Apache::inputtags::status['-1'];
149: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
150: $target eq 'tex') {
151: if (
152: (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
153: ($target eq 'answer') || ($target eq 'tex')
154: ) {
155: if ($target eq 'web') {
156: $result.=&Apache::lonxml::xmlend().'</html>';
157: }
158: }
159: if ($target eq 'grade') {
160: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
161: &Apache::structuretags::finalize_storage();
162: }
163: } elsif ($target eq 'meta') {
164: $result.='<parameter part="0" package="Task"></parameter>'."\n";
165: #$result.=&Apache::response::meta_part_order();
166: #$result.=&Apache::response::meta_response_order();
167: }
168: undef($Apache::lonhomework::parsing_a_task);
169: return $result;
170: }
171:
172: sub start_ClosingParagraph {
173: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
174: my $result;
175: if ($target eq 'web') {
176: }
177: return $result;
178: }
179:
180: sub end_ClosingParagraph {
181: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
182: my $result;
183: if ($target eq 'web') {
184: }
185: return $result;
186: }
187:
188: my %dimension;
189: my $dim_id;
190: sub start_Dimension {
191: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
192: undef(%dimension);
193: $dim_id=$Apache::lonxml::curdepth;
194: return '';
195: }
196:
197: sub end_Dimension {
198: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
199: my $result;
200: if ($target eq 'web') {
201: #FIXME just grabbing the first one for now, need
202: #to randomly pick one until all have been seen
203: #then start repicking
204: my $instance=$dimension{'instances'}->[0];
205: $result=$dimension{'intro'}.
206: $dimension{$instance.'.text'};
207: #FIXME: don't show the criteria yet
208: #foreach my $id (@{$dimension{$instance.'.criterias'}}) {
209: # $result.=$dimension{$instance.'.criteria.'.$id};
210: #}
211: }
212: return $result;
213: }
214:
215: sub start_IntroParagraph {
216: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
217: my $result;
218: if ($target eq 'web') {
219: if ($tagstack->[-2] eq 'Dimension') {
220: &Apache::lonxml::startredirection();
221: }
222: }
223: return $result;
224: }
225:
226: sub end_IntroParagraph {
227: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
228: my $result;
229: if ($target eq 'web') {
230: if ($tagstack->[-2] eq 'Dimension') {
231: $dimension{'intro'}=&Apache::lonxml::endredirection();
232: }
233: }
234: return $result;
235: }
236:
237: my $instance_id;
238: sub start_Instance {
239: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
240: push(@{$dimension{'instances'}},$Apache::lonxml::curdepth);
241: $instance_id=$Apache::lonxml::curdepth;
242: return '';
243: }
244:
245: sub end_Instance {
246: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
247: return '';
248: }
249:
250: sub start_InstanceText {
251: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
252: if ($target eq 'web') {
253: &Apache::lonxml::startredirection();
254: }
255: return '';
256: }
257:
258: sub end_InstanceText {
259: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
260: if ($target eq 'web') {
261: $dimension{$instance_id.'.text'}=&Apache::lonxml::endredirection();
262: }
263: return '';
264: }
265:
266: sub start_Criteria {
267: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
268: if ($target eq 'web') {
269: &Apache::lonxml::startredirection();
270: }
271: return '';
272: }
273:
274: sub end_Criteria {
275: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
276: if ($target eq 'web') {
277: my $criteria=&Apache::lonxml::endredirection();
278: my $id=$Apache::lonxml::curdepth;
279: $dimension{$instance_id.'.criteria.'.$id}=$criteria;
280: push(@{$dimension{$instance_id.'.criterias'}},$id);
281: }
282: return '';
283: }
284:
285: sub proctor_validation_screen {
286: my ($slot) = @_;
287: my (undef,undef,$domain,$user) = &Apache::lonxml::whichuser();
288: my $url=&Apache::lonnet::studentphoto($domain,$user,'jpg');
289: $user=$ENV{'form.proctorname'};
290: if ($ENV{'form.proctordomain'}) { $domain=$ENV{'form.proctordomain'}; }
291: my $msg;
292: if ($ENV{'form.proctorpassword'}) {
293: $msg='<p><font color="red">'.&mt("Failed to authenticate the proctor.")
294: .'</font></p>';
295: }
296: my $result= (<<ENDCHECKOUT);
297: <h2>Proctor Validation</h2>
298: <p>Your room's proctor needs to validate your access to this resource.</p>
299: $msg
300: <form name="checkout" method="POST" action="$ENV{'request.uri'}">
301: <input type="hidden" name="validate" value="yes" />
302: <input type="hidden" name="submitted" value="yes" />
303: <table>
304: <tr><td>Proctor's Username:</td><td><input type="string" name="proctorname" value="$user" /></td></tr>
305: <tr><td>Password:</td><td><input type="password" name="proctorpassword" value="" /></td></tr>
306: <tr><td>Proctor's Domain:</td><td><input type="string" name="proctordomain" value="$domain" /></td></tr>
307: </table>
308: <input type="submit" name="checkoutbutton" value="Validate" /><br />
309: Student who should be logged in is:<br />
310: <img src="$url" /><br />
311: </form>
312: ENDCHECKOUT
313: return $result;
314: }
315:
316: 1;
317: __END__
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