File:
[LON-CAPA] /
loncom /
homework /
bridgetask.pm
Revision
1.14:
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Tue May 3 00:05:41 2005 UTC (19 years, 2 months ago) by
albertel
Branches:
MAIN
CVS tags:
HEAD
- adding gradding queus mechanism
- submissions adds to grading queue
- webgrade attempts to find a suitable user to grade and lock it to myself with proper error handling for a variety of failure modes (i.e tries to do a 2 phase commit)
1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: bridgetask.pm,v 1.14 2005/05/03 00:05:41 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 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,my $slot_name,$slot) =
116: &Apache::lonhomework::check_task_access('0');
117: push(@Apache::inputtags::status,$status);
118: $Apache::inputtags::slot_name=$slot_name;
119: my $expression='$external::datestatus="'.$status.'";';
120: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
121: &Apache::run::run($expression,$safeeval);
122: &Apache::lonxml::debug("Got $status");
123: if (( $status eq 'CLOSED' ) ||
124: ( $status eq 'BANNED') ||
125: ( $status eq 'UNAVAILABLE') ||
126: ( $status eq 'NOT_IN_A_SLOT') ||
127: ( $status eq 'NEEDS_CHECKIN') ||
128: ( $status eq 'INVALID_ACCESS')) {
129: my $bodytext=&Apache::lonxml::get_all_text("/task",$parser);
130: if ( $target eq "web" ) {
131: $result.= $head_tag_start.'</head>'.$body_tag_start;
132: my $msg;
133: if ($status eq 'UNAVAILABLE') {
134: $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
135: } elsif ($status eq 'NOT_IN_A_SLOT') {
136: $msg.='<h1>'.&mt('You are not currently signed up to work at this time and/or place.').'</h1>';
137: } elsif ($status eq 'NEEDS_CHECKIN') {
138: $msg.='<h1>'.&mt('You need the Proctor to validate you.').
139: '</h1>'.&proctor_validation_screen($slot);
140: } elsif ($status ne 'NOT_YET_VIEWED') {
141: $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
142: }
143: if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
144: $msg.='The problem '.$accessmsg;
145: }
146: $result.=$msg.'<br />';
147: } elsif ($target eq 'tex') {
148: $result.='\begin{document}\noindent \vskip 1 mm \begin{minipage}{\textwidth}\vskip 0 mm';
149: if ($status eq 'UNAVAILABLE') {
150: $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
151: } else {
152: $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
153: }
154: } elsif ($target eq 'grade') {
155: if ($status eq 'NEEDS_CHECKIN') {
156: if (&proctor_check_auth($slot)) {
157: #FIXME immeadiatly add this to the grading queue
158: # with slot->{'endtime'} for when grading can
159: # begin on this resource
160: }
161: }
162: }
163: } elsif ($target eq 'web') {
164: my $name= &Apache::structuretags::get_resource_name($parstack,$safeeval);
165: $result.="$head_tag_start<title>$name</title></head>
166: $body_tag_start \n $form_tag_start".
167: '<input type="hidden" name="submitted" value="yes" />';
168: # if we are viewing someone else preserve that info
169: if (defined $env{'form.grade_symb'}) {
170: foreach my $field ('symb','courseid','domain','username') {
171: $result .= '<input type="hidden" name="grade_'.$field.
172: '" value="'.$env{"form.grade_$field"}.'" />'."\n";
173: }
174: }
175: }
176: } elsif ($target eq 'webgrade') {
177: $result.=$head_tag_start.$body_tag_start.$form_tag_start.
178: 'Yahoo!';
179: $result.=&show_queue();
180: $result.=&get_from_queue();
181:
182: } else {
183: # page_start returned a starting result, delete it if we don't need it
184: $result = '';
185: }
186: return $result;
187: }
188:
189: sub end_Task {
190: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
191: my $result='';
192: my $status=$Apache::inputtags::status['-1'];
193: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
194: $target eq 'tex' || $target eq 'webgrade') {
195: if (
196: (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
197: ($target eq 'answer') || ($target eq 'tex')
198: ) {
199: if ($target eq 'web') {
200: if ($status eq 'CAN_ANSWER') {
201: $result.='<table border="1">'.
202: &Apache::inputtags::file_selector('0',"bridgetask","*",
203: 'portfolioonly').
204: "</table>";
205: $result.=&Apache::inputtags::gradestatus('0');
206: }
207: }
208: if ($target eq 'web' || $target eq 'webgrade') {
209: $result.=&Apache::lonxml::xmlend().'</html>';
210: }
211: }
212: if ($target eq 'grade') {
213: my $award='SUBMITTED';
214: &Apache::essayresponse::file_submission('0','bridgetask','portfiles',\$award);
215: if ($award eq 'SUBMITTED' &&
216: $Apache::lonhomework::results{"resource.0.bridgetask.portfiles"}) {
217: $Apache::lonhomework::results{"resource.0.tries"}=
218: 1+$Apache::lonhomework::history{"resource.0.tries"};
219: }
220: $Apache::lonhomework::results{"resource.0.award"}=$award;
221: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
222: &Apache::structuretags::finalize_storage();
223: if ($award eq 'SUBMITTED') {
224: &add_to_queue();
225: }
226: }
227: } elsif ($target eq 'meta') {
228: $result.='<parameter part="0" package="Task"></parameter>'."\n";
229: #$result.=&Apache::response::meta_part_order();
230: #$result.=&Apache::response::meta_response_order();
231: }
232: undef($Apache::lonhomework::parsing_a_task);
233: return $result;
234: }
235:
236: sub add_to_queue {
237: my ($symb,$cid,$udom,$uname)=&Apache::lonxml::whichuser();
238: my $cnum=$env{'course.'.$cid.'.num'};
239: my $cdom=$env{'course.'.$cid.'.domain'};
240: my %data;
241: #$data{"$symb\0timestamp"}=time;
242: $data{"$symb\0queue\0$uname\@$udom"}=[$Apache::inputtags::slot_name];
243: &Apache::lonnet::put('gradingqueue',\%data,$cdom,$cnum);
244: }
245:
246: sub show_queue {
247: my $result;
248: my ($symb,$cid,$udom,$uname)=&Apache::lonxml::whichuser();
249: my $cnum=$env{'course.'.$cid.'.num'};
250: my $cdom=$env{'course.'.$cid.'.domain'};
251: my $regexp="^$symb\0queue";
252: my %queue=&Apache::lonnet::dump('gradingqueue',$cdom,$cnum,$regexp);
253: $result.="<table><tr><th>resource</th><th>user</th><th>Time available for grading</th></tr>";
254: foreach my $key (sort(keys(%queue))) {
255: my ($symb,undef,$user) = split("\0",$key);
256: my ($uname,$udom) = split('@',$user);
257: my $title=&Apache::lonnet::gettitle($symb);
258: $result.="<tr><td>$title</td><td>$uname</td><td>";
259: my $slot=$queue{$key}->[0];
260: my %slot_data=&Apache::lonnet::get_slot($slot);
261: $result.="End time: ".&Apache::lonlocal::locallocaltime($slot_data{'endtime'})."</td></tr>";
262: }
263: $result.="</table>";
264: return $result;
265: }
266:
267: sub decode_queue_key {
268: my ($key)=@_;
269: my ($symb,undef,$user) = split("\0",$key);
270: my ($uname,$udom) = split('@',$user);
271: return ($symb,$uname,$udom);
272: }
273:
274: sub queue_key_locked {
275: my ($key)=@_;
276: my ($key_locked,$value)=
277: &Apache::lonnet::get('gradingqueue',["$key\0locked"],$cdom,$cnum);
278: if ($key_locked eq "$key\0locked") {
279: return $value;
280: }
281: return undef;
282: }
283:
284: sub pick_from_queue_data {
285: my ($check_section,$queue)=@_;
286: foreach my $key (sort(keys(%$queue))) {
287: my ($symb,$uname,$udom)=&decode_queue_key($key);
288: if ($check_section) {
289: my $section=&Apache::lonnet::getsection($uname,$udom);
290: if ($section ne $check_section) { next; }
291: }
292: my $slot=$queue->{$key}[0];
293: my %slot_data=&Apache::lonnet::get_slot($slot);
294: if ($slot_data{'endtime'} > time) { next; }
295: if (&queue_key_locked($key)) { next; }
296: return $key;
297: }
298: return undef;
299: }
300:
301: sub get_from_queue {
302: my $result;
303: my ($symb,$cid,$udom,$uname)=&Apache::lonxml::whichuser();
304: my $cnum=$env{'course.'.$cid.'.num'};
305: my $cdom=$env{'course.'.$cid.'.domain'};
306: my $todo;
307: while (1) {
308: my $starttime=time;
309: &Apache::lonnet::put('gradingqueue',{"$symb\0timestamp"=>$starttime},
310: $cdom,$cnum);
311: my $regexp="^$symb\0queue\0";
312: my %queue=&Apache::lonnet::dump('gradingqueue',$cdom,$cnum,$regexp);
313: #make a pass looking for a user in my section
314: if ($env{'request.course.sec'}) {
315: $todo=&pick_from_queue_data($env{'request.course.sec'},\%queue);
316: }
317: # no one in our section so look for any user that is ready for grading
318: if (!$todo) {
319: $todo=&pick_from_queue_data($env{'request.course.sec'},\%queue);
320: }
321: # no user to grade
322: if (!$todo) { last; }
323: # otherwise found someone so lets try to lock them
324: my $success=&Apache::lonnet::newput('gradingqueue',
325: {"$todo\0locked"=>
326: $env{'user.name'}.'@'.$env{'user.domain'}},
327: $cdom,$cnum);
328: # someone else already picked them
329: if ($success ne 'ok') { next; }
330: my (undef,$endtime)=
331: &Apache::lonnet::get('gradingqueue',["$symb\0timestamp"],
332: $cdom,$cnum);
333: # someone else already modified the queue,
334: # perhaps our picked user wass already fully graded between
335: # when we picked him and when we locked his record? so lets
336: # double check.
337: if ($endtime != $starttime) {
338: my ($key,$value)=
339: &Apache::lonnet::get('gradingqueue',["$todo"],
340: $cdom,$cnum);
341: if ($key eq $todo && ref($value)) {
342: } else {
343: &Apache::lonnet::del('gradingqueue',["$todo\0locked"],
344: $cdom,$cnum);
345: next;
346: }
347: }
348: last;
349: }
350: return $todo;
351: }
352:
353: sub start_ClosingParagraph {
354: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
355: my $result;
356: if ($target eq 'web') {
357: } elsif ($target eq 'webgrade') {
358: &Apache::lonxml::startredirection();
359: }
360: return $result;
361: }
362:
363: sub end_ClosingParagraph {
364: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
365: my $result;
366: if ($target eq 'web') {
367: } elsif ($target eq 'webgrade') {
368: &Apache::lonxml::endredirection();
369: }
370: return $result;
371: }
372:
373: my %dimension;
374: sub start_Dimension {
375: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
376: undef(%dimension);
377: my $dim_id=$Apache::lonxml::curdepth;
378: $Apache::bridgetask::dimension=$dim_id;
379: push(@Apache::bridgetask::dimensionlist,$dim_id);
380: undef(@Apache::bridgetask::instance);
381: return '';
382: }
383:
384: sub get_instance {
385: #FIXME just grabbing the first one for now, need
386: #to randomly pick one until all have been seen
387: #then start repicking
388: &Apache::response::pushrandomnumber();
389: my @order=&Math::Random::random_permutation(@{$dimension{'instances'}});
390: return $order[0];
391: }
392:
393: sub end_Dimension {
394: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
395: my $result;
396: if ($target eq 'web') {
397: my $instance=&get_instance();
398: $result=$dimension{'intro'}.$dimension{$instance.'.text'};
399: } elsif ($target eq 'webgrade') {
400: my $instance=&get_instance();
401: $result.='<table>';
402: foreach my $id (@{$dimension{$instance.'.criterias'}}) {
403: $result.='<tr><td>'.
404: $dimension{$instance.'.criteria.'.$id}.'</td></tr>';
405: }
406: $result.='</table>';
407: }
408: return $result;
409: }
410:
411: sub start_IntroParagraph {
412: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
413: my $result;
414: if ($target eq 'web' || $target eq 'webgrade') {
415: if ($tagstack->[-2] eq 'Dimension' || $target eq 'webgrade') {
416: &Apache::lonxml::startredirection();
417: }
418: }
419: return $result;
420: }
421:
422: sub end_IntroParagraph {
423: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
424: my $result;
425: if ($target eq 'web' || $target eq 'webgrade') {
426: if ($tagstack->[-2] eq 'Dimension' || $target eq 'webgrade') {
427: $dimension{'intro'}=&Apache::lonxml::endredirection();
428: }
429: }
430: return $result;
431: }
432:
433: sub start_Instance {
434: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
435: push(@{$dimension{'instances'}},$Apache::lonxml::curdepth);
436: push(@Apache::bridgetask::instance,$Apache::lonxml::curdepth);
437: push(@Apache::bridgetask::instancelist,$Apache::lonxml::curdepth);
438: return '';
439: }
440:
441: sub end_Instance {
442: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
443: return '';
444: }
445:
446: sub start_InstanceText {
447: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
448: if ($target eq 'web' || $target eq 'webgrade') {
449: &Apache::lonxml::startredirection();
450: }
451: return '';
452: }
453:
454: sub end_InstanceText {
455: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
456: my $instance_id=$Apache::bridgetask::instance[-1];
457: if ($target eq 'web' || $target eq 'webgrade') {
458: $dimension{$instance_id.'.text'}=&Apache::lonxml::endredirection();
459: }
460: return '';
461: }
462:
463: sub start_Criteria {
464: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
465: if ($target eq 'web' || $target eq 'webgrade') {
466: &Apache::lonxml::startredirection();
467: }
468: return '';
469: }
470:
471: sub end_Criteria {
472: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
473: my $instance_id=$Apache::bridgetask::instance[-1];
474: if ($target eq 'web' || $target eq 'webgrade') {
475: my $criteria=&Apache::lonxml::endredirection();
476: my $id=$Apache::lonxml::curdepth;
477: $dimension{$instance_id.'.criteria.'.$id}=$criteria;
478: push(@{$dimension{$instance_id.'.criterias'}},$id);
479: }
480: return '';
481: }
482:
483: sub proctor_validation_screen {
484: my ($slot) = @_;
485: my (undef,undef,$domain,$user) = &Apache::lonxml::whichuser();
486: my $url=&Apache::lonnet::studentphoto($domain,$user,'jpg');
487: $user=$env{'form.proctorname'};
488: if ($env{'form.proctordomain'}) { $domain=$env{'form.proctordomain'}; }
489: my $msg;
490: if ($env{'form.proctorpassword'}) {
491: $msg='<p><font color="red">'.&mt("Failed to authenticate the proctor.")
492: .'</font></p>';
493: }
494: my $result= (<<ENDCHECKOUT);
495: <h2>Proctor Validation</h2>
496: <p>Your room's proctor needs to validate your access to this resource.</p>
497: $msg
498: <form name="checkout" method="POST" action="$env{'request.uri'}">
499: <input type="hidden" name="validate" value="yes" />
500: <input type="hidden" name="submitted" value="yes" />
501: <table>
502: <tr><td>Proctor's Username:</td><td><input type="string" name="proctorname" value="$user" /></td></tr>
503: <tr><td>Password:</td><td><input type="password" name="proctorpassword" value="" /></td></tr>
504: <tr><td>Proctor's Domain:</td><td><input type="string" name="proctordomain" value="$domain" /></td></tr>
505: </table>
506: <input type="submit" name="checkoutbutton" value="Validate" /><br />
507: Student who should be logged in is:<br />
508: <img src="$url" /><br />
509: </form>
510: ENDCHECKOUT
511: return $result;
512: }
513:
514: 1;
515: __END__
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