1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: bridgetask.pm,v 1.10 2005/04/05 15:39:41 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::essayresponse::file_submission('0','bridgetask','portfiles','SUBMITTED');
192: if ($Apache::lonhomework::results{"resource.0.bridgetask.portfiles"}) {
193: $Apache::lonhomework::results{"resource.0.tries"}=
194: 1+$Apache::lonhomework::history{"resource.0.tries"};
195: }
196: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
197: &Apache::structuretags::finalize_storage();
198: }
199: } elsif ($target eq 'meta') {
200: $result.='<parameter part="0" package="Task"></parameter>'."\n";
201: #$result.=&Apache::response::meta_part_order();
202: #$result.=&Apache::response::meta_response_order();
203: }
204: undef($Apache::lonhomework::parsing_a_task);
205: return $result;
206: }
207:
208: sub start_ClosingParagraph {
209: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
210: my $result;
211: if ($target eq 'web') {
212: }
213: return $result;
214: }
215:
216: sub end_ClosingParagraph {
217: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
218: my $result;
219: if ($target eq 'web') {
220: }
221: return $result;
222: }
223:
224: my %dimension;
225: sub start_Dimension {
226: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
227: undef(%dimension);
228: my $dim_id=$Apache::lonxml::curdepth;
229: $Apache::bridgetask::dimension=$dim_id;
230: push(@Apache::bridgetask::dimensionlist,$dim_id);
231: undef(@Apache::bridgetask::instance);
232: return '';
233: }
234:
235: sub end_Dimension {
236: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
237: my $result;
238: if ($target eq 'web') {
239: #FIXME just grabbing the first one for now, need
240: #to randomly pick one until all have been seen
241: #then start repicking
242: &Apache::response::pushrandomnumber();
243: my @order=&Math::Random::random_permutation(@{$dimension{'instances'}});
244: my $instance=$order[0];
245: $result=$dimension{'intro'}.$dimension{$instance.'.text'};
246: #FIXME: don't show the criteria yet
247: #foreach my $id (@{$dimension{$instance.'.criterias'}}) {
248: # $result.=$dimension{$instance.'.criteria.'.$id};
249: #}
250: }
251: return $result;
252: }
253:
254: sub start_IntroParagraph {
255: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
256: my $result;
257: if ($target eq 'web') {
258: if ($tagstack->[-2] eq 'Dimension') {
259: &Apache::lonxml::startredirection();
260: }
261: }
262: return $result;
263: }
264:
265: sub end_IntroParagraph {
266: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
267: my $result;
268: if ($target eq 'web') {
269: if ($tagstack->[-2] eq 'Dimension') {
270: $dimension{'intro'}=&Apache::lonxml::endredirection();
271: }
272: }
273: return $result;
274: }
275:
276: sub start_Instance {
277: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
278: push(@{$dimension{'instances'}},$Apache::lonxml::curdepth);
279: push(@Apache::bridgetask::instance,$Apache::lonxml::curdepth);
280: push(@Apache::bridgetask::instancelist,$Apache::lonxml::curdepth);
281: return '';
282: }
283:
284: sub end_Instance {
285: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
286: return '';
287: }
288:
289: sub start_InstanceText {
290: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
291: if ($target eq 'web') {
292: &Apache::lonxml::startredirection();
293: }
294: return '';
295: }
296:
297: sub end_InstanceText {
298: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
299: my $instance_id=$Apache::bridgetask::instance[-1];
300: if ($target eq 'web') {
301: $dimension{$instance_id.'.text'}=&Apache::lonxml::endredirection();
302: }
303: return '';
304: }
305:
306: sub start_Criteria {
307: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
308: if ($target eq 'web') {
309: &Apache::lonxml::startredirection();
310: }
311: return '';
312: }
313:
314: sub end_Criteria {
315: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
316: my $instance_id=$Apache::bridgetask::instance[-1];
317: if ($target eq 'web') {
318: my $criteria=&Apache::lonxml::endredirection();
319: my $id=$Apache::lonxml::curdepth;
320: $dimension{$instance_id.'.criteria.'.$id}=$criteria;
321: push(@{$dimension{$instance_id.'.criterias'}},$id);
322: }
323: return '';
324: }
325:
326: sub proctor_validation_screen {
327: my ($slot) = @_;
328: my (undef,undef,$domain,$user) = &Apache::lonxml::whichuser();
329: my $url=&Apache::lonnet::studentphoto($domain,$user,'jpg');
330: $user=$ENV{'form.proctorname'};
331: if ($ENV{'form.proctordomain'}) { $domain=$ENV{'form.proctordomain'}; }
332: my $msg;
333: if ($ENV{'form.proctorpassword'}) {
334: $msg='<p><font color="red">'.&mt("Failed to authenticate the proctor.")
335: .'</font></p>';
336: }
337: my $result= (<<ENDCHECKOUT);
338: <h2>Proctor Validation</h2>
339: <p>Your room's proctor needs to validate your access to this resource.</p>
340: $msg
341: <form name="checkout" method="POST" action="$ENV{'request.uri'}">
342: <input type="hidden" name="validate" value="yes" />
343: <input type="hidden" name="submitted" value="yes" />
344: <table>
345: <tr><td>Proctor's Username:</td><td><input type="string" name="proctorname" value="$user" /></td></tr>
346: <tr><td>Password:</td><td><input type="password" name="proctorpassword" value="" /></td></tr>
347: <tr><td>Proctor's Domain:</td><td><input type="string" name="proctordomain" value="$domain" /></td></tr>
348: </table>
349: <input type="submit" name="checkoutbutton" value="Validate" /><br />
350: Student who should be logged in is:<br />
351: <img src="$url" /><br />
352: </form>
353: ENDCHECKOUT
354: return $result;
355: }
356:
357: 1;
358: __END__
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