1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: bridgetask.pm,v 1.13 2005/04/29 21:22:33 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 add_grading_button {
86: my $result;
87: $result.=' <input type="submit" name="gradeasubmission" value="'.
88: &mt("Get a submission to grade").'" />';
89: $result.='<input type="hidden" name="grade_target" value="webgrade" />';
90: return $result;
91: }
92:
93: sub start_Task {
94: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
95:
96: &Apache::structuretags::initialize_storage();
97: &Apache::lonhomework::showhash(%Apache::lonhomework::history);
98: my ($status,$accessmsg,$slot);
99: $Apache::lonhomework::parsing_a_task=1;
100: #should get back a <html> or the neccesary stuff to start XML/MathML
101: my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
102: &Apache::structuretags::page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
103:
104: if ($target eq 'web') {
105: $body_tag_start.=&add_previous_version_button();
106: if ($Apache::lonhomework::modifygrades) {
107: $body_tag_start.='<form name="gradesubmission" method="POST" action="';
108: my $uri=$env{'request.uri'};
109: if ($env{'request.enc'}) { $uri=&Apache::lonenc::encrypted($uri); }
110: $body_tag_start.=$uri.'">'.&add_grading_button()."</form>";
111: }
112: }
113: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
114: $target eq 'tex') {
115: ($status,$accessmsg,$slot) =
116: &Apache::lonhomework::check_task_access('0');
117: push(@Apache::inputtags::status,$status);
118: my $expression='$external::datestatus="'.$status.'";';
119: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
120: &Apache::run::run($expression,$safeeval);
121: &Apache::lonxml::debug("Got $status");
122: if (( $status eq 'CLOSED' ) ||
123: ( $status eq 'BANNED') ||
124: ( $status eq 'UNAVAILABLE') ||
125: ( $status eq 'NOT_IN_A_SLOT') ||
126: ( $status eq 'NEEDS_CHECKIN') ||
127: ( $status eq 'INVALID_ACCESS')) {
128: my $bodytext=&Apache::lonxml::get_all_text("/task",$parser);
129: if ( $target eq "web" ) {
130: $result.= $head_tag_start.'</head>'.$body_tag_start;
131: my $msg;
132: if ($status eq 'UNAVAILABLE') {
133: $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
134: } elsif ($status eq 'NOT_IN_A_SLOT') {
135: $msg.='<h1>'.&mt('You are not currently signed up to work at this time and/or place.').'</h1>';
136: } elsif ($status eq 'NEEDS_CHECKIN') {
137: $msg.='<h1>'.&mt('You need the Proctor to validate you.').
138: '</h1>'.&proctor_validation_screen($slot);
139: } elsif ($status ne 'NOT_YET_VIEWED') {
140: $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
141: }
142: if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
143: $msg.='The problem '.$accessmsg;
144: }
145: $result.=$msg.'<br />';
146: } elsif ($target eq 'tex') {
147: $result.='\begin{document}\noindent \vskip 1 mm \begin{minipage}{\textwidth}\vskip 0 mm';
148: if ($status eq 'UNAVAILABLE') {
149: $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
150: } else {
151: $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
152: }
153: } elsif ($target eq 'grade') {
154: if ($status eq 'NEEDS_CHECKIN') {
155: if (&proctor_check_auth($slot)) {
156: #FIXME immeadiatly add this to the grading queue
157: # with slot->{'endtime'} for when grading can
158: # begin on this resource
159: }
160: }
161: }
162: } elsif ($target eq 'web') {
163: my $name= &Apache::structuretags::get_resource_name($parstack,$safeeval);
164: $result.="$head_tag_start<title>$name</title></head>
165: $body_tag_start \n $form_tag_start".
166: '<input type="hidden" name="submitted" value="yes" />';
167: # if we are viewing someone else preserve that info
168: if (defined $env{'form.grade_symb'}) {
169: foreach my $field ('symb','courseid','domain','username') {
170: $result .= '<input type="hidden" name="grade_'.$field.
171: '" value="'.$env{"form.grade_$field"}.'" />'."\n";
172: }
173: }
174: }
175: } elsif ($target eq 'webgrade') {
176: $result.=$head_tag_start.$body_tag_start.$form_tag_start.
177: 'Yahoo!';
178: } else {
179: # page_start returned a starting result, delete it if we don't need it
180: $result = '';
181: }
182: return $result;
183: }
184:
185: sub end_Task {
186: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
187: my $result='';
188: my $status=$Apache::inputtags::status['-1'];
189: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
190: $target eq 'tex' || $target eq 'webgrade') {
191: if (
192: (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
193: ($target eq 'answer') || ($target eq 'tex')
194: ) {
195: if ($target eq 'web') {
196: if ($status eq 'CAN_ANSWER') {
197: $result.='<table border="1">'.
198: &Apache::inputtags::file_selector('0',"bridgetask","*",
199: 'portfolioonly').
200: "</table>";
201: $result.=&Apache::inputtags::gradestatus('0');
202: }
203: }
204: if ($target eq 'web' || $target eq 'webgrade') {
205: $result.=&Apache::lonxml::xmlend().'</html>';
206: }
207: }
208: if ($target eq 'grade') {
209: my $award='SUBMITTED';
210: &Apache::essayresponse::file_submission('0','bridgetask','portfiles',$award);
211: if ($Apache::lonhomework::results{"resource.0.bridgetask.portfiles"}) {
212: $Apache::lonhomework::results{"resource.0.tries"}=
213: 1+$Apache::lonhomework::history{"resource.0.tries"};
214: }
215: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
216: &Apache::structuretags::finalize_storage();
217: }
218: } elsif ($target eq 'meta') {
219: $result.='<parameter part="0" package="Task"></parameter>'."\n";
220: #$result.=&Apache::response::meta_part_order();
221: #$result.=&Apache::response::meta_response_order();
222: }
223: undef($Apache::lonhomework::parsing_a_task);
224: return $result;
225: }
226:
227: sub start_ClosingParagraph {
228: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
229: my $result;
230: if ($target eq 'web') {
231: } elsif ($target eq 'webgrade') {
232: &Apache::lonxml::startredirection();
233: }
234: return $result;
235: }
236:
237: sub end_ClosingParagraph {
238: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
239: my $result;
240: if ($target eq 'web') {
241: } elsif ($target eq 'webgrade') {
242: &Apache::lonxml::endredirection();
243: }
244: return $result;
245: }
246:
247: my %dimension;
248: sub start_Dimension {
249: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
250: undef(%dimension);
251: my $dim_id=$Apache::lonxml::curdepth;
252: $Apache::bridgetask::dimension=$dim_id;
253: push(@Apache::bridgetask::dimensionlist,$dim_id);
254: undef(@Apache::bridgetask::instance);
255: return '';
256: }
257:
258: sub get_instance {
259: #FIXME just grabbing the first one for now, need
260: #to randomly pick one until all have been seen
261: #then start repicking
262: &Apache::response::pushrandomnumber();
263: my @order=&Math::Random::random_permutation(@{$dimension{'instances'}});
264: return $order[0];
265: }
266:
267: sub end_Dimension {
268: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
269: my $result;
270: if ($target eq 'web') {
271: my $instance=&get_instance();
272: $result=$dimension{'intro'}.$dimension{$instance.'.text'};
273: } elsif ($target eq 'webgrade') {
274: my $instance=&get_instance();
275: $result.='<table>';
276: foreach my $id (@{$dimension{$instance.'.criterias'}}) {
277: $result.='<tr><td>'.
278: $dimension{$instance.'.criteria.'.$id}.'</td></tr>';
279: }
280: $result.='</table>';
281: }
282: return $result;
283: }
284:
285: sub start_IntroParagraph {
286: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
287: my $result;
288: if ($target eq 'web' || $target eq 'webgrade') {
289: if ($tagstack->[-2] eq 'Dimension' || $target eq 'webgrade') {
290: &Apache::lonxml::startredirection();
291: }
292: }
293: return $result;
294: }
295:
296: sub end_IntroParagraph {
297: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
298: my $result;
299: if ($target eq 'web' || $target eq 'webgrade') {
300: if ($tagstack->[-2] eq 'Dimension' || $target eq 'webgrade') {
301: $dimension{'intro'}=&Apache::lonxml::endredirection();
302: }
303: }
304: return $result;
305: }
306:
307: sub start_Instance {
308: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
309: push(@{$dimension{'instances'}},$Apache::lonxml::curdepth);
310: push(@Apache::bridgetask::instance,$Apache::lonxml::curdepth);
311: push(@Apache::bridgetask::instancelist,$Apache::lonxml::curdepth);
312: return '';
313: }
314:
315: sub end_Instance {
316: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
317: return '';
318: }
319:
320: sub start_InstanceText {
321: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
322: if ($target eq 'web' || $target eq 'webgrade') {
323: &Apache::lonxml::startredirection();
324: }
325: return '';
326: }
327:
328: sub end_InstanceText {
329: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
330: my $instance_id=$Apache::bridgetask::instance[-1];
331: if ($target eq 'web' || $target eq 'webgrade') {
332: $dimension{$instance_id.'.text'}=&Apache::lonxml::endredirection();
333: }
334: return '';
335: }
336:
337: sub start_Criteria {
338: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
339: if ($target eq 'web' || $target eq 'webgrade') {
340: &Apache::lonxml::startredirection();
341: }
342: return '';
343: }
344:
345: sub end_Criteria {
346: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
347: my $instance_id=$Apache::bridgetask::instance[-1];
348: if ($target eq 'web' || $target eq 'webgrade') {
349: my $criteria=&Apache::lonxml::endredirection();
350: my $id=$Apache::lonxml::curdepth;
351: $dimension{$instance_id.'.criteria.'.$id}=$criteria;
352: push(@{$dimension{$instance_id.'.criterias'}},$id);
353: }
354: return '';
355: }
356:
357: sub proctor_validation_screen {
358: my ($slot) = @_;
359: my (undef,undef,$domain,$user) = &Apache::lonxml::whichuser();
360: my $url=&Apache::lonnet::studentphoto($domain,$user,'jpg');
361: $user=$env{'form.proctorname'};
362: if ($env{'form.proctordomain'}) { $domain=$env{'form.proctordomain'}; }
363: my $msg;
364: if ($env{'form.proctorpassword'}) {
365: $msg='<p><font color="red">'.&mt("Failed to authenticate the proctor.")
366: .'</font></p>';
367: }
368: my $result= (<<ENDCHECKOUT);
369: <h2>Proctor Validation</h2>
370: <p>Your room's proctor needs to validate your access to this resource.</p>
371: $msg
372: <form name="checkout" method="POST" action="$env{'request.uri'}">
373: <input type="hidden" name="validate" value="yes" />
374: <input type="hidden" name="submitted" value="yes" />
375: <table>
376: <tr><td>Proctor's Username:</td><td><input type="string" name="proctorname" value="$user" /></td></tr>
377: <tr><td>Password:</td><td><input type="password" name="proctorpassword" value="" /></td></tr>
378: <tr><td>Proctor's Domain:</td><td><input type="string" name="proctordomain" value="$domain" /></td></tr>
379: </table>
380: <input type="submit" name="checkoutbutton" value="Validate" /><br />
381: Student who should be logged in is:<br />
382: <img src="$url" /><br />
383: </form>
384: ENDCHECKOUT
385: return $result;
386: }
387:
388: 1;
389: __END__
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