1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: bridgetask.pm,v 1.9 2005/04/04 18:14:58 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:
41: BEGIN {
42: &Apache::lonxml::register('Apache::bridgetask',('Task','IntroParagraph','Dimension','Instance','InstanceText','Criteria','ClosingParagraph'));
43: }
44:
45: sub initialize_bridgetask {
46: # id of current Dimension, 0 means that no dimension is current
47: # (inside <Task> only)
48: $Apache::bridgetask::dimension='';
49: # list of all Dimension ids seen
50: @Apache::bridgetask::dimensionlist=();
51: # list of all current Instance ids
52: @Apache::bridgetask::instance=();
53: # list of all Instance ids seen in this problem
54: @Apache::bridgetask::instancelist=();
55: }
56:
57: sub proctor_check_auth {
58: my ($slot)=@_;
59: my $user=$ENV{'form.proctorname'};
60: my $domain=$ENV{'form.proctordomain'};
61:
62: my @allowed=split(",",$slot->{'proctor'});
63: foreach my $possible (@allowed) {
64: my ($puser,$pdom)=(split('@',$possible));
65: if ($puser eq $user && $pdom eq $domain) {
66: my $authhost=&Apache::lonnet::authenticate($puser,$ENV{'form.proctorpassword'},$pdom);
67: if ($authhost ne 'no_host') {
68: $Apache::lonhomework::results{'resource.checkedin'}=
69: $user.'@'.$domain;
70: return 1;
71: }
72: }
73: }
74: return 0;
75: }
76:
77: sub add_previous_version_button {
78: my $result;
79: $result.=&mt(' Show a previously done version: [_1]','<select name="previousversion">
80: <option>Pick one</option>
81: </select>');
82: return $result;
83: }
84:
85: sub start_Task {
86: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
87:
88: &Apache::structuretags::initialize_storage();
89: &Apache::lonhomework::showhash(%Apache::lonhomework::history);
90:
91: my ($status,$accessmsg,$slot);
92: $Apache::lonhomework::parsing_a_task=1;
93: #should get back a <html> or the neccesary stuff to start XML/MathML
94: my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
95: &Apache::structuretags::page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
96:
97: if ($target eq 'web') {
98: $body_tag_start.=&add_previous_version_button();
99: }
100: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
101: $target eq 'tex') {
102: ($status,$accessmsg,$slot) =
103: &Apache::lonhomework::check_task_access('0');
104: push(@Apache::inputtags::status,$status);
105: my $expression='$external::datestatus="'.$status.'";';
106: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
107: &Apache::run::run($expression,$safeeval);
108: &Apache::lonxml::debug("Got $status");
109: if (( $status eq 'CLOSED' ) ||
110: ( $status eq 'BANNED') ||
111: ( $status eq 'UNAVAILABLE') ||
112: ( $status eq 'NOT_IN_A_SLOT') ||
113: ( $status eq 'NEEDS_CHECKIN') ||
114: ( $status eq 'INVALID_ACCESS')) {
115: my $bodytext=&Apache::lonxml::get_all_text("/task",$parser);
116: if ( $target eq "web" ) {
117: $result.= $head_tag_start.'</head>'.$body_tag_start;
118: my $msg;
119: if ($status eq 'UNAVAILABLE') {
120: $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
121: } elsif ($status eq 'NOT_IN_A_SLOT') {
122: $msg.='<h1>'.&mt('You are not currently signed up to work at this time and/or place.').'</h1>';
123: } elsif ($status eq 'NEEDS_CHECKIN') {
124: $msg.='<h1>'.&mt('You need the Proctor to validate you.').
125: '</h1>'.&proctor_validation_screen($slot);
126: } elsif ($status ne 'NOT_YET_VIEWED') {
127: $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
128: }
129: if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
130: $msg.='The problem '.$accessmsg;
131: }
132: $result.=$msg.'<br />';
133: } elsif ($target eq 'tex') {
134: $result.='\begin{document}\noindent \vskip 1 mm \begin{minipage}{\textwidth}\vskip 0 mm';
135: if ($status eq 'UNAVAILABLE') {
136: $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
137: } else {
138: $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
139: }
140: } elsif ($target eq 'grade') {
141: if ($status eq 'NEEDS_CHECKIN') {
142: if (&proctor_check_auth($slot)) {
143: #FIXME immeadiatly add this to the grading queue
144: # with slot->{'endtime'} for when grading can
145: # begin on this resource
146: }
147: }
148: }
149: } elsif ($target eq 'web') {
150: my $name= &Apache::structuretags::get_resource_name($parstack,$safeeval);
151: $result.="$head_tag_start<title>$name</title></head>
152: $body_tag_start \n $form_tag_start".
153: '<input type="hidden" name="submitted" value="yes" />';
154: # if we are viewing someone else preserve that info
155: if (defined $ENV{'form.grade_symb'}) {
156: foreach my $field ('symb','courseid','domain','username') {
157: $result .= '<input type="hidden" name="grade_'.$field.
158: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
159: }
160: }
161: }
162: } else {
163: # page_start returned a starting result, delete it if we don't need it
164: $result = '';
165: }
166: return $result;
167: }
168:
169: sub end_Task {
170: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
171: my $result='';
172: my $status=$Apache::inputtags::status['-1'];
173: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
174: $target eq 'tex') {
175: if (
176: (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
177: ($target eq 'answer') || ($target eq 'tex')
178: ) {
179: if ($target eq 'web') {
180: if ($status eq 'CAN_ANSWER') {
181: $result.='<table border="1">'.
182: &Apache::inputtags::file_selector('0',"bridgetask","*",
183: 'portfolioonly').
184: "</table>";
185: $result.=&Apache::inputtags::gradestatus('0');
186: }
187: $result.=&Apache::lonxml::xmlend().'</html>';
188: }
189: }
190: if ($target eq 'grade') {
191: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
192: &Apache::structuretags::finalize_storage();
193: }
194: } elsif ($target eq 'meta') {
195: $result.='<parameter part="0" package="Task"></parameter>'."\n";
196: #$result.=&Apache::response::meta_part_order();
197: #$result.=&Apache::response::meta_response_order();
198: }
199: undef($Apache::lonhomework::parsing_a_task);
200: return $result;
201: }
202:
203: sub start_ClosingParagraph {
204: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
205: my $result;
206: if ($target eq 'web') {
207: }
208: return $result;
209: }
210:
211: sub end_ClosingParagraph {
212: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
213: my $result;
214: if ($target eq 'web') {
215: }
216: return $result;
217: }
218:
219: my %dimension;
220: sub start_Dimension {
221: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
222: undef(%dimension);
223: my $dim_id=$Apache::lonxml::curdepth;
224: $Apache::bridgetask::dimension=$dim_id;
225: push(@Apache::bridgetask::dimensionlist,$dim_id);
226: undef(@Apache::bridgetask::instance);
227: return '';
228: }
229:
230: sub end_Dimension {
231: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
232: my $result;
233: if ($target eq 'web') {
234: #FIXME just grabbing the first one for now, need
235: #to randomly pick one until all have been seen
236: #then start repicking
237: &Apache::response::pushrandomnumber();
238: my $num_instances=scalar(@{$dimension{'instances'}});
239: my $which=&Math::Random::random_uniform_integer(1,0,$num_instances-1);
240: my $instance=$dimension{'instances'}->[$which];
241: $result=$dimension{'intro'}.$dimension{$instance.'.text'};
242: #FIXME: don't show the criteria yet
243: #foreach my $id (@{$dimension{$instance.'.criterias'}}) {
244: # $result.=$dimension{$instance.'.criteria.'.$id};
245: #}
246: }
247: return $result;
248: }
249:
250: sub start_IntroParagraph {
251: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
252: my $result;
253: if ($target eq 'web') {
254: if ($tagstack->[-2] eq 'Dimension') {
255: &Apache::lonxml::startredirection();
256: }
257: }
258: return $result;
259: }
260:
261: sub end_IntroParagraph {
262: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
263: my $result;
264: if ($target eq 'web') {
265: if ($tagstack->[-2] eq 'Dimension') {
266: $dimension{'intro'}=&Apache::lonxml::endredirection();
267: }
268: }
269: return $result;
270: }
271:
272: sub start_Instance {
273: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
274: push(@{$dimension{'instances'}},$Apache::lonxml::curdepth);
275: push(@Apache::bridgetask::instance,$Apache::lonxml::curdepth);
276: push(@Apache::bridgetask::instancelist,$Apache::lonxml::curdepth);
277: return '';
278: }
279:
280: sub end_Instance {
281: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
282: return '';
283: }
284:
285: sub start_InstanceText {
286: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
287: if ($target eq 'web') {
288: &Apache::lonxml::startredirection();
289: }
290: return '';
291: }
292:
293: sub end_InstanceText {
294: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
295: my $instance_id=$Apache::bridgetask::instance[-1];
296: if ($target eq 'web') {
297: $dimension{$instance_id.'.text'}=&Apache::lonxml::endredirection();
298: }
299: return '';
300: }
301:
302: sub start_Criteria {
303: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
304: if ($target eq 'web') {
305: &Apache::lonxml::startredirection();
306: }
307: return '';
308: }
309:
310: sub end_Criteria {
311: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
312: my $instance_id=$Apache::bridgetask::instance[-1];
313: if ($target eq 'web') {
314: my $criteria=&Apache::lonxml::endredirection();
315: my $id=$Apache::lonxml::curdepth;
316: $dimension{$instance_id.'.criteria.'.$id}=$criteria;
317: push(@{$dimension{$instance_id.'.criterias'}},$id);
318: }
319: return '';
320: }
321:
322: sub proctor_validation_screen {
323: my ($slot) = @_;
324: my (undef,undef,$domain,$user) = &Apache::lonxml::whichuser();
325: my $url=&Apache::lonnet::studentphoto($domain,$user,'jpg');
326: $user=$ENV{'form.proctorname'};
327: if ($ENV{'form.proctordomain'}) { $domain=$ENV{'form.proctordomain'}; }
328: my $msg;
329: if ($ENV{'form.proctorpassword'}) {
330: $msg='<p><font color="red">'.&mt("Failed to authenticate the proctor.")
331: .'</font></p>';
332: }
333: my $result= (<<ENDCHECKOUT);
334: <h2>Proctor Validation</h2>
335: <p>Your room's proctor needs to validate your access to this resource.</p>
336: $msg
337: <form name="checkout" method="POST" action="$ENV{'request.uri'}">
338: <input type="hidden" name="validate" value="yes" />
339: <input type="hidden" name="submitted" value="yes" />
340: <table>
341: <tr><td>Proctor's Username:</td><td><input type="string" name="proctorname" value="$user" /></td></tr>
342: <tr><td>Password:</td><td><input type="password" name="proctorpassword" value="" /></td></tr>
343: <tr><td>Proctor's Domain:</td><td><input type="string" name="proctordomain" value="$domain" /></td></tr>
344: </table>
345: <input type="submit" name="checkoutbutton" value="Validate" /><br />
346: Student who should be logged in is:<br />
347: <img src="$url" /><br />
348: </form>
349: ENDCHECKOUT
350: return $result;
351: }
352:
353: 1;
354: __END__
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