1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.213 2005/07/13 19:48:07 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: package Apache::lonhomework;
30: use strict;
31: use Apache::style();
32: use Apache::lonxml();
33: use Apache::lonnet;
34: use Apache::lonplot();
35: use Apache::inputtags();
36: use Apache::structuretags();
37: use Apache::randomlabel();
38: use Apache::response();
39: use Apache::hint();
40: use Apache::outputtags();
41: use Apache::caparesponse();
42: use Apache::radiobuttonresponse();
43: use Apache::optionresponse();
44: use Apache::imageresponse();
45: use Apache::essayresponse();
46: use Apache::externalresponse();
47: use Apache::rankresponse();
48: use Apache::matchresponse();
49: use Apache::chemresponse();
50: use Apache::drawimage();
51: use Apache::Constants qw(:common);
52: use HTML::Entities();
53: use Apache::loncommon();
54: use Apache::lonlocal;
55: use Time::HiRes qw( gettimeofday tv_interval );
56: use Apache::lonnet();
57:
58: # FIXME - improve commenting
59:
60:
61: BEGIN {
62: &Apache::lonxml::register_insert();
63: }
64:
65:
66: #
67: # Decides what targets to render for.
68: # Implicit inputs:
69: # Various session environment variables:
70: # request.state - published - is a /res/ resource
71: # uploaded - is a /uploaded/ resource
72: # contruct - is a /priv/ resource
73: # form.grade_target - a form parameter requesting a specific target
74: sub get_target {
75: &Apache::lonxml::debug("request.state = $env{'request.state'}");
76: if( defined($env{'form.grade_target'})) {
77: &Apache::lonxml::debug("form.grade_target= $env{'form.grade_target'}");
78: } else {
79: &Apache::lonxml::debug("form.grade_target <undefined>");
80: }
81: if (($env{'request.state'} eq "published") ||
82: ($env{'request.state'} eq "uploaded")) {
83: if ( defined($env{'form.grade_target'} )
84: && ($env{'form.grade_target'} eq 'tex')) {
85: return ($env{'form.grade_target'});
86: } elsif ( defined($env{'form.grade_target'} )
87: && ($Apache::lonhomework::viewgrades eq 'F' )) {
88: return ($env{'form.grade_target'});
89: }
90: if ($env{'form.webgrade'} &&
91: $Apache::lonhomework::modifygrades eq 'F') {
92: return ('grade','webgrade');
93: }
94: if ( defined($env{'form.submitted'}) &&
95: ( !defined($env{'form.resetdata'})) &&
96: ( !defined($env{'form.newrandomization'}))) {
97: return ('grade', 'web');
98: } else {
99: return ('web');
100: }
101: } elsif ($env{'request.state'} eq "construct") {
102: if ( defined($env{'form.grade_target'}) ) {
103: return ($env{'form.grade_target'});
104: }
105: if ( defined($env{'form.preview'})) {
106: if ( defined($env{'form.submitted'})) {
107: return ('grade', 'web');
108: } else {
109: return ('web');
110: }
111: } else {
112: if ( $env{'form.problemmode'} eq &mt('View') ||
113: $env{'form.problemmode'} eq &mt('Discard Edits and View')) {
114: if ( defined($env{'form.submitted'}) &&
115: (!defined($env{'form.resetdata'})) &&
116: (!defined($env{'form.newrandomization'}))) {
117: return ('grade', 'web','answer');
118: } else {
119: return ('web','answer');
120: }
121: } elsif ( $env{'form.problemmode'} eq &mt('Edit') ||
122: $env{'form.problemmode'} eq 'Edit') {
123: if ( $env{'form.submitted'} eq 'edit' ) {
124: if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
125: return ('modified','web','answer');
126: } else {
127: return ('modified','no_output_web','edit');
128: }
129: } else {
130: return ('no_output_web','edit');
131: }
132: } else {
133: return ('web');
134: }
135: }
136: }
137: return ();
138: }
139:
140: sub setup_vars {
141: my ($target) = @_;
142: return ';'
143: # return ';$external::target='.$target.';';
144: }
145:
146: sub send_header {
147: my ($request)= @_;
148: $request->print(&Apache::lontexconvert::header());
149: # $request->print('<form name='.$env{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
150: }
151:
152: sub createmenu {
153: my ($which,$request)=@_;
154: if ($which eq 'grade') {
155: $request->print('<script language="JavaScript">
156: hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
157: "height=350,width=150,menubar=no");
158: </script>');
159: }
160: }
161:
162: sub send_footer {
163: my ($request)= @_;
164: # $request->print('</form>');
165: $request->print(&Apache::lontexconvert::footer());
166: }
167:
168: sub proctor_checked_in {
169: my ($slot_name,$slot)=@_;
170: my @allowed=split(",",$slot->{'proctor'});
171: my $version=$Apache::lonhomework::history{'resource.version'};
172: foreach my $possible (@allowed) {
173: if ($Apache::lonhomework::history{"resource.$version.checkedin"} eq
174: $possible &&
175: $Apache::lonhomework::history{"resource.$version.checkedin.slot"}
176: eq $slot_name) {
177: return 1;
178: }
179: }
180: return 0;
181: }
182:
183: $Apache::lonxml::browse='';
184: sub check_ip_acc {
185: my ($acc)=@_;
186: if (!defined($acc) || $acc =~ /^\s*$/) { return 1; }
187: my $allowed=0;
188: my $ip=$ENV{'REMOTE_ADDR'};
189: my $name;
190: foreach my $pattern (split(',',$acc)) {
191: if ($pattern =~ /\*$/) {
192: #35.8.*
193: $pattern=~s/\*//;
194: if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
195: } elsif ($pattern =~ /(\d+\.\d+\.\d+)\.\[(\d+)-(\d+)\]$/) {
196: #35.8.3.[34-56]
197: my $low=$2;
198: my $high=$3;
199: $pattern=$1;
200: if ($ip =~ /^\Q$pattern\E/) {
201: my $last=(split(/\./,$ip))[3];
202: if ($last <=$high && $last >=$low) { $allowed=1; }
203: }
204: } elsif ($pattern =~ /^\*/) {
205: #*.msu.edu
206: $pattern=~s/\*//;
207: if (!defined($name)) {
208: use Socket;
209: my $netaddr=inet_aton($ip);
210: ($name)=gethostbyaddr($netaddr,AF_INET);
211: }
212: if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
213: } elsif ($pattern =~ /\d+\.\d+\.\d+\.\d+/) {
214: #127.0.0.1
215: if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
216: } else {
217: #some.name.com
218: if (!defined($name)) {
219: use Socket;
220: my $netaddr=inet_aton($ip);
221: ($name)=gethostbyaddr($netaddr,AF_INET);
222: }
223: if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
224: }
225: if ($allowed) { last; }
226: }
227: return $allowed;
228: }
229:
230: sub check_task_access {
231: # does it pass normal muster
232: # yes we really do want the default args passing
233: my ($status,$datemsg)=&check_access;
234: if ($status eq 'SHOW_ANSWER' ||
235: $status eq 'CLOSED' ||
236: $status eq 'CANNOT_ANSWER' ||
237: $status eq 'INVALID_ACCESS' ||
238: $status eq 'UNAVAILABLE') {
239: return ($status,$datemsg);
240: }
241: if ($env{'request.state'} eq "construct") {
242: return ($status,$datemsg);
243: }
244: my $version=$Apache::lonhomework::history{'resource.version'};
245: if ($Apache::lonhomework::history{"resource.$version.checkedin"} &&
246: $Apache::lonhomework::history{"resource.$version.status"} eq 'pass') {
247: return ('SHOW_ANSWER');
248: }
249: my ($id)=@_;
250: my @slots=
251: (split(':',&Apache::lonnet::EXT("resource.$id.availablestudent")),
252: split(':',&Apache::lonnet::EXT("resource.$id.available")));
253:
254: # if (!@slots) {
255: # return ($status,$datemsg);
256: # }
257: my $slotstatus='NOT_IN_A_SLOT';
258: my ($returned_slot,$slot_name);
259: foreach my $slot (@slots) {
260: &Apache::lonxml::debug("getting $slot");
261: my %slot=&Apache::lonnet::get_slot($slot);
262: &Apache::lonhomework::showhash(%slot);
263: if ($slot{'starttime'} < time &&
264: $slot{'endtime'} > time &&
265: &check_ip_acc($slot{'ip'})) {
266: &Apache::lonxml::debug("$slot is good");
267: $slotstatus='NEEDS_CHECKIN';
268: $returned_slot=\%slot;
269: $slot_name=$slot;
270: last;
271: }
272: }
273: if ($slotstatus eq 'NEEDS_CHECKIN' &&
274: &proctor_checked_in($slot_name,$returned_slot)) {
275: &Apache::lonxml::debug("protoctor checked in");
276: $slotstatus='CAN_ANSWER';
277: }
278: if ( $slotstatus eq 'NOT_IN_A_SLOT' &&
279: $Apache::lonhomework::history{"resource.$version.checkedin"}) {
280: if ($Apache::lonhomework::history{"resource.$version.status"} eq 'fail') {
281: return ('SHOW_ANSWER');
282: } else {
283: return ('WAITING_FOR_GRADE');
284: }
285: }
286: return ($slotstatus,$datemsg,$slot_name,$returned_slot);
287: }
288:
289: # JB, 9/24/2002: Any changes in this function may require a change
290: # in lonnavmaps::resource::getDateStatus.
291: sub check_access {
292: my ($id) = @_;
293: my $date ='';
294: my $status;
295: my $datemsg = '';
296: my $lastdate = '';
297: my $temp;
298: my $type;
299: my $passed;
300:
301: if ($env{'request.state'} eq "construct") {
302: if ($env{'form.problemstate'}) {
303: if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
304: if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct' &&
305: lc($Apache::lonhomework::problemstatus) eq 'no')) {
306: return ('CANNOT_ANSWER',
307: &mt('is in this state due to author settings.'));
308: }
309: } else {
310: return ($env{'form.problemstate'},
311: &mt('is in this state due to author settings.'));
312: }
313: }
314: &Apache::lonxml::debug("in construction ignoring dates");
315: $status='CAN_ANSWER';
316: $datemsg=&mt('is in under construction');
317: # return ($status,$datemsg);
318: }
319:
320: &Apache::lonxml::debug("checking for part :$id:");
321: &Apache::lonxml::debug("time:".time);
322:
323: my ($symb)=&Apache::lonxml::whichuser();
324: &Apache::lonxml::debug("symb:".$symb);
325: #if ($env{'request.state'} ne "construct" && $symb ne '') {
326: if ($env{'request.state'} ne "construct") {
327: my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
328: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
329: $status='INVALID_ACCESS';
330: $date=&mt("can not be accessed from your location.");
331: return($status,$date);
332: }
333:
334: foreach $temp ("opendate","duedate","answerdate") {
335: $lastdate = $date;
336: $date = &Apache::lonnet::EXT("resource.$id.$temp");
337: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
338: if ($thistype =~ /^(con_lost|no_such_host)/ ||
339: $date =~ /^(con_lost|no_such_host)/) {
340: $status='UNAVAILABLE';
341: $date=&mt("may open later.");
342: return($status,$date);
343: }
344: if ($thistype eq 'date_interval') {
345: if ($temp eq 'opendate') {
346: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
347: }
348: if ($temp eq 'answerdate') {
349: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
350: }
351: }
352: &Apache::lonxml::debug("found :$date: for :$temp:");
353: if ($date eq '') {
354: $date = &mt("an unknown date"); $passed = 0;
355: } elsif ($date eq 'con_lost') {
356: $date = &mt("an indeterminate date"); $passed = 0;
357: } else {
358: if (time < $date) { $passed = 0; } else { $passed = 1; }
359: $date = localtime $date;
360: }
361: if (!$passed) { $type=$temp; last; }
362: }
363: &Apache::lonxml::debug("have :$type:$passed:");
364: if ($passed) {
365: $status='SHOW_ANSWER';
366: $datemsg=$date;
367: } elsif ($type eq 'opendate') {
368: $status='CLOSED';
369: $datemsg = &mt("will open on")." $date";
370: } elsif ($type eq 'duedate') {
371: $status='CAN_ANSWER';
372: $datemsg = &mt("is due at")." $date";
373: } elsif ($type eq 'answerdate') {
374: $status='CLOSED';
375: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
376: }
377: }
378: if ($status eq 'CAN_ANSWER' ||
379: (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
380: #check #tries, and if correct.
381: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
382: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
383: if ( $tries eq '' ) { $tries = '0'; }
384: if ( $maxtries eq '' &&
385: $env{'request.state'} ne 'construct') { $maxtries = '2'; }
386: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
387: # if (correct and show prob status) or excused then CANNOT_ANSWER
388: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
389: &&
390: lc($Apache::lonhomework::problemstatus) ne 'no')
391: ||
392: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
393: $status = 'CANNOT_ANSWER';
394: }
395: }
396: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
397: my $interval=&Apache::lonnet::EXT("resource.$id.interval");
398: &Apache::lonxml::debug("looking for interval $interval");
399: if ($interval) {
400: my $first_access=&Apache::lonnet::get_first_access('map');
401: &Apache::lonxml::debug("looking for accesstime $first_access");
402: if (!$first_access) {
403: $status='NOT_YET_VIEWED';
404: $datemsg=&seconds_to_human_length($interval);
405: } else {
406: my $newdate=localtime($first_access+$interval);
407: if (time > ($first_access+$interval)) {
408: $status='CLOSED';
409: $datemsg = &mt("was due on")." $newdate".&mt(", and answers will be available on")." $date";
410: } else {
411: $datemsg = &mt("is due at")." $newdate";
412: }
413: }
414: }
415: }
416: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
417: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
418: # return ('UNCHECKEDOUT','needs to be checked out');
419: #}
420:
421:
422: &Apache::lonxml::debug("sending back :$status:$datemsg:");
423: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
424: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
425: $status='CAN_ANSWER';
426: $datemsg=&mt('is closed but you are allowed to view it');
427: }
428:
429: return ($status,$datemsg);
430: }
431:
432: sub seconds_to_human_length {
433: my ($length)=@_;
434:
435: my $seconds=$length%60; $length=int($length/60);
436: my $minutes=$length%60; $length=int($length/60);
437: my $hours=$length%24; $length=int($length/24);
438: my $days=$length;
439:
440: my $timestr;
441: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
442: if ($hours > 0) { $timestr.=($timestr?", ":"").
443: &mt('[quant,_1,hour]',$hours); }
444: if ($minutes > 0) { $timestr.=($timestr?", ":"").
445: &mt('[quant,_1,minute]',$minutes); }
446: if ($seconds > 0) { $timestr.=($timestr?", ":"").
447: &mt('[quant,_1,second]',$seconds); }
448: return $timestr;
449: }
450:
451: sub showhash {
452: my (%hash) = @_;
453: &showhashsubset(\%hash,'.');
454: return '';
455: }
456:
457: sub showarray {
458: my ($array)=@_;
459: my $string="(";
460: foreach my $elm (@{ $array }) {
461: if (ref($elm) eq 'ARRAY') {
462: $string.=&showarray($elm);
463: } elsif (ref($elm) eq 'HASH') {
464: $string.= "HASH --- \n<br />";
465: $string.= &showhashsubset($elm,'.');
466: } else {
467: $string.="$elm,"
468: }
469: }
470: chop($string);
471: $string.=")";
472: return $string;
473: }
474:
475: sub showhashsubset {
476: my ($hash,$keyre) = @_;
477: my $resultkey;
478: foreach $resultkey (sort keys %$hash) {
479: if ($resultkey !~ /$keyre/) { next; }
480: if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
481: &Apache::lonxml::debug("$resultkey ---- ".
482: &showarray($$hash{$resultkey}));
483: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
484: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
485: &showhashsubset($$hash{$resultkey},'.');
486: } else {
487: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
488: }
489: }
490: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
491: return '';
492: }
493:
494: sub setuppermissions {
495: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
496: my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
497: if (! $viewgrades &&
498: exists($env{'request.course.sec'}) &&
499: $env{'request.course.sec'} !~ /^\s*$/) {
500: $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
501: '/'.$env{'request.course.sec'});
502: }
503: $Apache::lonhomework::viewgrades = $viewgrades; # File global variable...dirt.
504: if ($Apache::lonhomework::browse eq 'F' &&
505: $env{'form.devalidatecourseresdata'} eq 'on') {
506: my (undef,$courseid) = &Apache::lonxml::whichuser();
507: &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
508: $env{"course.$courseid.domain"});
509: }
510: my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
511: if (! $modifygrades &&
512: exists($env{'request.course.sec'}) &&
513: $env{'request.course.sec'} !~ /^\s*$/) {
514: $modifygrades =
515: &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
516: '/'.$env{'request.course.sec'});
517: }
518: $Apache::lonhomework::modifygrades = $modifygrades;
519: return '';
520: }
521:
522: sub setupheader {
523: my $request=$_[0];
524: &Apache::loncommon::content_type($request,'text/html');
525: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
526: &Apache::loncommon::no_cache($request);
527: }
528: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
529: # 'lastrevisiondate'));
530: $request->send_http_header;
531: return OK if $request->header_only;
532: return ''
533: }
534:
535: sub handle_save_or_undo {
536: my ($request,$problem,$result) = @_;
537: my $file = &Apache::lonnet::filelocation("",$request->uri);
538: my $filebak =$file.".bak";
539: my $filetmp =$file.".tmp";
540: my $error=0;
541:
542: &Apache::lonnet::correct_line_ends($result);
543:
544: if ($env{'form.Undo'} eq &mt('undo')) {
545: my $error=0;
546: if (!copy($file,$filetmp)) { $error=1; }
547: if ((!$error) && (!copy($filebak,$file))) { $error=1; }
548: if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
549: if (!$error) {
550: &Apache::lonxml::info("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");
551: } else {
552: &Apache::lonxml::info("<p><font color=\"red\" size=\"+1\"><b>".&mt("Unable to undo, unable to switch")." $filebak ".&mt("and")." $file</b></font></p>");
553: $error=1;
554: }
555: } else {
556: my $fs=Apache::File->new(">$filebak");
557: if (defined($fs)) {
558: print $fs $$problem;
559: &Apache::lonxml::info("<b>".&mt("Making Backup to").
560: " $filebak</b>");
561: } else {
562: &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");
563: $error=2;
564: }
565: my $fh=Apache::File->new(">$file");
566: if (defined($fh)) {
567: print $fh $$result;
568: &Apache::lonxml::info("<b>".&mt("Saving Modifications to").
569: " $file</b>");
570: } else {
571: &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".
572: &mt("Unable to write to")." $file</b></font>");
573: $error|=4;
574: }
575: }
576: return $error;
577: }
578:
579: sub analyze_header {
580: my ($request) = @_;
581: my $bodytag='<body bgcolor="#ffffff">';
582: if ($env{'environment.remote'} eq 'off') {
583: $bodytag=&Apache::loncommon::bodytag();
584: }
585: my $html=&Apache::lonxml::xmlbegin();
586: my $result.=$html.'
587: <head><title>'.&mt("Analyzing a problem").'</title></head>
588: '.$bodytag.&Apache::lonxml::message_location().'
589: <form name="lonhomework" method="POST" action="'.
590: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
591: &Apache::structuretags::remember_problem_state().'
592: <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
593: <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
594: <hr />
595: <input type="submit" name="submit" value="'.&mt("View").'" />
596: <hr />
597: </form>';
598: &Apache::lonxml::add_messages(\$result);
599: $request->print($result);
600: $request->rflush();
601: }
602:
603: sub analyze_footer {
604: my ($request) = @_;
605: my $result='</body></html>';
606: $request->print($result);
607: $request->rflush();
608: }
609:
610: sub analyze {
611: my ($request,$file) = @_;
612: &Apache::lonxml::debug("Analyze");
613: my $result;
614: my %overall;
615: my %allparts;
616: my $rndseed=$env{'form.rndseed'};
617: &analyze_header($request);
618: my %prog_state=
619: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
620: &mt('Getting Problem Variants'),
621: $env{'form.numtoanalyze'},
622: 'inline',undef);
623: for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
624: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
625: &mt('last problem'));
626: if (&Apache::loncommon::connection_aborted($request)) { return; }
627: my $subresult=&Apache::lonnet::ssi($request->uri,
628: ('grade_target' => 'analyze'),
629: ('rndseed' => $i+$rndseed));
630: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
631: my %analyze=&Apache::lonnet::str2hash($subresult);
632: my @parts;
633: if (defined(@{ $analyze{'parts'} })) {
634: @parts=@{ $analyze{'parts'} };
635: }
636: foreach my $part (@parts) {
637: if (!exists($allparts{$part})) {$allparts{$part}=1;};
638: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
639: $analyze{$part.'.type'} eq 'stringresponse' ||
640: $analyze{$part.'.type'} eq 'formularesponse' ) {
641: push( @{ $overall{$part.'.answer'} },
642: [@{ $analyze{$part.'.answer'} }]);
643: }
644: }
645: }
646: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
647: &mt('Analyzing Results'));
648: $request->print('<hr />'.&mt('List of possible answers').': ');
649: foreach my $part (sort(keys(%allparts))) {
650: if (defined(@{ $overall{$part.'.answer'} })) {
651: my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
652: $request->print('<table><tr><th colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</th></tr>');
653: my %frequency;
654: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
655: $frequency{join("\0",@{ $answer })}++;
656: }
657: $request->print('<tr><th colspan="'.($num_cols).'">'.&mt('Answer').'</th><th>'.&mt('Frequency').'</th></tr>');
658: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
659: $request->print('<tr><td align="right">'.
660: join('</td><td align="right">',split("\0",$answer)).
661: '</td><td>('.$frequency{$answer}.
662: ')</td></tr>');
663: }
664: $request->print('</table>');
665: } else {
666: $request->print('<p>'.&mt('Response').' '.$part.' '.
667: &mt('is not analyzable at this time').'</p>');
668: }
669: }
670: if (scalar(keys(%allparts)) == 0 ) {
671: $request->print('<p>'.&mt('Found no analyzable respones in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
672: }
673: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
674: &analyze_footer($request);
675: &Apache::lonhomework::showhash(%overall);
676: return $result;
677: }
678:
679: sub editxmlmode {
680: my ($request,$file) = @_;
681: my $result;
682: my $problem=&Apache::lonnet::getfile($file);
683: if ($problem eq -1) {
684: &Apache::lonxml::error("<b> ".&mt('Unable to find').
685: " <i>$file</i></b>");
686: $problem='';
687: }
688: if (defined($env{'form.editxmltext'}) || defined($env{'form.Undo'})) {
689: my $error=&handle_save_or_undo($request,\$problem,
690: \$env{'form.editxmltext'});
691: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
692: }
693: &Apache::lonhomework::showhashsubset(\%env,'^form');
694: if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
695: &Apache::lonhomework::showhashsubset(\%env,'^form');
696: $env{'form.problemmode'}='View';
697: &renderpage($request,$file);
698: } else {
699: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
700: my $xml_help = '<table><tr><td>'.
701: &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
702: "Problem Editing Help").
703: '</td><td>'.
704: &Apache::loncommon::help_open_menu('',undef,undef,undef,5,'Authoring').
705: '</td></tr></table>';
706: if ($cols > 80) { $cols = 80; }
707: if ($cols < 70) { $cols = 70; }
708: if ($rows < 20) { $rows = 20; }
709: my $bodytag='<body bgcolor="#ffffff">';
710: if ($env{'environment.remote'} eq 'off') {
711: $bodytag=&Apache::loncommon::bodytag();
712: }
713: my $html=&Apache::lonxml::xmlbegin();
714: $result.=$html.$bodytag.
715: &renderpage($request,$file,['no_output_web'],1).
716: &Apache::lonxml::message_location().'
717: <form name="lonhomework" method="POST" action="'.
718: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
719: &Apache::structuretags::remember_problem_state().'
720: <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
721: <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
722: <input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
723: <hr />
724: <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
725: <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
726: <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
727: <hr />
728: ' . $xml_help . '
729: <textarea style="width:100%" rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
730: &HTML::Entities::encode($problem,'<>&"').'</textarea>
731: </form></body></html>';
732: &Apache::lonxml::add_messages(\$result);
733: $request->print($result);
734: }
735: return '';
736: }
737:
738: #
739: # Render the page in whatever target desired.
740: #
741: sub renderpage {
742: my ($request,$file,$targets,$return_string) = @_;
743:
744: my @targets = @{$targets || [&get_target()]};
745: &Apache::lonhomework::showhashsubset(\%env,'form.');
746: &Apache::lonxml::debug("Running targets ".join(':',@targets));
747: my $overall_result;
748: foreach my $target (@targets) {
749: # FIXME need to do something intelligent when a problem goes
750: # from viewable to not viewable due to map conditions
751: #&setuppermissions();
752: #if ( $Apache::lonhomework::browse ne '2'
753: # && $Apache::lonhomework::browse ne 'F' ) {
754: # $request->print(" You most likely shouldn't see me.");
755: #}
756: #my $t0 = [&gettimeofday()];
757: my $output=1;
758: if ($target eq 'no_output_web') {
759: $target = 'web'; $output=0;
760: }
761: my $problem=&Apache::lonnet::getfile($file);
762: if ($problem eq -1) {
763: &Apache::lonxml::error("<b> ".&mt('Unable to find')." <i>$file</i></b>");
764: $problem='';
765: }
766:
767: my %mystyle;
768: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
769: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
770: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
771:
772: &Apache::lonxml::debug("Should be parsing now");
773: my $result = &Apache::lonxml::xmlparse($request, $target, $problem,
774: &setup_vars($target),%mystyle);
775: undef($Apache::lonhomework::parsing_a_problem);
776: if (!$output) { $result = '';&Apache::lonxml::message_location().'c'; }
777: #$request->print("Result follows:");
778: if ($target eq 'modified') {
779: &handle_save_or_undo($request,\$problem,\$result);
780: } else {
781: if ($target eq 'analyze') {
782: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
783: undef(%Apache::lonhomework::analyze);
784: }
785: #my $td=&tv_interval($t0);
786: #if ( $Apache::lonxml::debug) {
787: #$result =~ s:</body>::;
788: #$result.="<br />Spent $td seconds processing target $target\n</body>";
789: #}
790: # $request->print($result);
791: $overall_result.=$result;
792: # $request->rflush();
793: }
794: #$request->print(":Result ends");
795: #my $td=&tv_interval($t0);
796: }
797: if (!$return_string) {
798: &Apache::lonxml::add_messages(\$overall_result);
799: $request->print($overall_result);
800: $request->rflush();
801: } else {
802: return $overall_result;
803: }
804: }
805:
806: # with no arg it returns a HTML <option> list of the template titles
807: # with one arg it returns the filename associated with the arg passed
808: sub get_template_list {
809: my ($namewanted,$extension) = @_;
810: my $result;
811: my @allnames;
812: &Apache::lonxml::debug("Looking for :$extension:");
813: foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
814: my $name=&Apache::lonnet::metadata($file,'title');
815: if ($namewanted && ($name eq $namewanted)) {
816: $result=$file;
817: last;
818: } else {
819: if ($name) { push (@allnames, $name); }
820: }
821: }
822: if (@allnames && !$result) {
823: $result="<option>".&mt("Select a")." $extension ".&mt('template')."</option>\n<option>".
824: join('</option><option>',sort(@allnames)).'</option>';
825: }
826: return $result;
827: }
828:
829: sub newproblem {
830: my ($request) = @_;
831: my $extension=$request->uri;
832: $extension=~s:^.*\.([\w]+)$:$1:;
833: &Apache::lonxml::debug("Looking for :$extension:");
834: my $templatelist=&get_template_list('',$extension);
835: if ($env{'form.template'} &&
836: $env{'form.template'} ne "Select a $extension template") {
837: use File::Copy;
838: my $file = &get_template_list($env{'form.template'},$extension);
839: my $dest = &Apache::lonnet::filelocation("",$request->uri);
840: copy($file,$dest);
841: &renderpage($request,$dest);
842: } elsif($env{'form.newfile'} && !$templatelist) {
843: # I don't like hard-coded filenames but for now, this will work.
844: use File::Copy;
845: my $templatefilename =
846: $request->dir_config('lonIncludes').'/templates/blank.problem';
847: &Apache::lonxml::debug("$templatefilename");
848: my $dest = &Apache::lonnet::filelocation("",$request->uri);
849: copy($templatefilename,$dest);
850: &renderpage($request,$dest);
851: } else {
852: my $url=&HTML::Entities::encode($request->uri,'<>&"');
853: my $shownurl=$url;
854: $shownurl=~s-^/~-/priv/-;
855: my $dest = &Apache::lonnet::filelocation("",$request->uri);
856: my $errormsg;
857: if ($env{'form.newfile'}) {
858: $errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";
859: }
860: my $instructions;
861: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,
862: ($env{'environment.remote'} ne 'off'));
863: if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}
864: my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',
865: 'resource' => 'resource',
866: 'requested' => 'The requested file',
867: 'not exist' => 'currently does not exist',
868: 'createnew' => 'To create a new',
869: 'click' => 'click on the',
870: 'Create' => 'Create',
871: 'button' => 'button');
872: $request->print(<<ENDNEWPROBLEM);
873: $bodytag
874: <h1>$lt{'create'} $extension $lt{'resource'}</h1>
875: $errormsg
876: $lt{'requested'} <tt>$shownurl</tt> $lt{'not exist'}.
877: <p>
878: <b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>
879: </p>
880: <p><form action="$url" method="POST">
881: ENDNEWPROBLEM
882: if (defined($templatelist)) {
883: $request->print("<select name=\"template\">$templatelist</select>");
884: }
885: $request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");
886: $request->print("</form></p></body>");
887: }
888: return '';
889: }
890:
891: sub view_or_edit_menu {
892: my ($request) = @_;
893: my $url=&HTML::Entities::encode($request->uri,'<>&"');
894: my %lt=&Apache::lonlocal::texthash( 'would' => 'Would you like to',
895: 'view' => 'View',
896: 'Edit' => 'edit',
897: 'or' => 'or',
898: 'the problem' => 'the problem');
899: $request->print(<<EDITMENU);
900: <body bgcolor="#FFFFFF">
901: <form action="$url" method="POST">
902: $lt{'would'} <input type="submit" name="problemmode" accesskey="v" value="<{'view'}">
903: <{'or'} <input type="submit" name="problemmode" accesskey="e" value="<{'Edit'}">
904: <{'the problem'}.
905: </form>
906: </body>
907: EDITMENU
908: }
909:
910: sub handler {
911: #my $t0 = [&gettimeofday()];
912: my $request=$_[0];
913:
914: $Apache::lonxml::debug=$env{'user.debug'};
915: $env{'request.uri'}=$request->uri;
916: &setuppermissions();
917: # some times multiple problemmodes are submitted, need to select
918: # the last one
919: if ( defined($env{'form.problemmode'}) && ref($env{'form.problemmode'}) ) {
920: my $mode=$env{'form.problemmode'}->[-1];
921: undef $env{'form.problemmode'};
922: $env{'form.problemmode'}=$mode;
923: }
924:
925: my $file=&Apache::lonnet::filelocation("",$request->uri);
926:
927: #check if we know where we are
928: if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) {
929: # if we are browsing we might not be able to know where we are
930: if ($Apache::lonhomework::browse ne 'F' &&
931: $env{'request.state'} ne "construct") {
932: #should know where we are, so ask
933: if ( &Apache::lonnet::mod_perl_version() == 2 ) {
934: &Apache::lonnet::cleanenv();
935: }
936: &Apache::lonnet::logthis(&Apache::lonnet::mod_perl_version());
937: $request->internal_redirect('/adm/ambiguous'); return OK;
938: }
939: }
940: if (&setupheader($request)) { return OK; }
941: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
942: &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
943: my ($symb) = &Apache::lonxml::whichuser();
944: &Apache::lonxml::debug('symb is '.$symb);
945: if ($env{'request.state'} eq "construct" || $symb eq '') {
946: if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
947: $env{'form.resetdata'} eq &mt('New Problem Variation') ||
948: $env{'form.newrandomization'} eq &mt('New Randomization')) {
949: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
950: &Apache::lonnet::tmpreset($symb,'',$domain,$name);
951: &Apache::lonxml::debug("Attempt reset");
952: }
953: }
954: if ($env{'request.state'} eq "construct") {
955: if ( -e $file ) {
956: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
957: ['problemmode']);
958: if (!(defined $env{'form.problemmode'})) {
959: #first visit to problem in construction space
960: #&view_or_edit_menu($request);
961: $env{'form.problemmode'}='View';
962: &renderpage($request,$file);
963: } elsif ($env{'form.problemmode'} eq &mt('EditXML') ||
964: $env{'form.problemmode'} eq 'EditXML') {
965: &editxmlmode($request,$file);
966: } elsif ($env{'form.problemmode'} eq &mt('Calculate answers')) {
967: &analyze($request,$file);
968: } else {
969: &renderpage($request,$file);
970: }
971: } else {
972: # requested file doesn't exist in contruction space
973: &newproblem($request);
974: }
975: } else {
976: # just render the page normally outside of construction space
977: &Apache::lonxml::debug("not construct");
978: &renderpage($request,$file);
979: }
980: #my $td=&tv_interval($t0);
981: #&Apache::lonxml::debug("Spent $td seconds processing");
982: # &Apache::lonhomework::send_footer($request);
983: # always turn off debug messages
984: $Apache::lonxml::debug=0;
985: return OK;
986:
987: }
988:
989: 1;
990: __END__
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