1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.204 2005/04/07 06:56:21 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 ($env{'form.grade_target'});
89: }
90:
91: if ( defined($env{'form.submitted'}) &&
92: ( !defined($env{'form.resetdata'})) &&
93: ( !defined($env{'form.newrandomization'}))) {
94: return ('grade', 'web');
95: } else {
96: return ('web');
97: }
98: } elsif ($env{'request.state'} eq "construct") {
99: if ( defined($env{'form.grade_target'}) ) {
100: return ($env{'form.grade_target'});
101: }
102: if ( defined($env{'form.preview'})) {
103: if ( defined($env{'form.submitted'})) {
104: return ('grade', 'web');
105: } else {
106: return ('web');
107: }
108: } else {
109: if ( $env{'form.problemmode'} eq &mt('View') ||
110: $env{'form.problemmode'} eq &mt('Discard Edits and View')) {
111: if ( defined($env{'form.submitted'}) &&
112: (!defined($env{'form.resetdata'})) &&
113: (!defined($env{'form.newrandomization'}))) {
114: return ('grade', 'web','answer');
115: } else {
116: return ('web','answer');
117: }
118: } elsif ( $env{'form.problemmode'} eq &mt('Edit') ||
119: $env{'form.problemmode'} eq 'Edit') {
120: if ( $env{'form.submitted'} eq 'edit' ) {
121: if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
122: return ('modified','web','answer');
123: } else {
124: return ('modified','edit');
125: }
126: } else {
127: return ('edit');
128: }
129: } else {
130: return ('web');
131: }
132: }
133: }
134: return ();
135: }
136:
137: sub setup_vars {
138: my ($target) = @_;
139: return ';'
140: # return ';$external::target='.$target.';';
141: }
142:
143: sub send_header {
144: my ($request)= @_;
145: $request->print(&Apache::lontexconvert::header());
146: # $request->print('<form name='.$env{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
147: }
148:
149: sub createmenu {
150: my ($which,$request)=@_;
151: if ($which eq 'grade') {
152: $request->print('<script language="JavaScript">
153: hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
154: "height=350,width=150,menubar=no");
155: </script>');
156: }
157: }
158:
159: sub send_footer {
160: my ($request)= @_;
161: # $request->print('</form>');
162: $request->print(&Apache::lontexconvert::footer());
163: }
164:
165: sub proctor_checked_in {
166: my ($slot)=@_;
167: my @allowed=split(",",$slot->{'proctor'});
168: foreach my $possible (@allowed) {
169: if ($Apache::lonhomework::history{'resource.checkedin'} eq $possible) {
170: return 1;
171: }
172: }
173: return 0;
174: }
175:
176: $Apache::lonxml::browse='';
177: sub check_ip_acc {
178: my ($acc)=@_;
179: if (!defined($acc) || $acc =~ /^\s*$/) { return 1; }
180: my $allowed=0;
181: my $ip=$ENV{'REMOTE_ADDR'};
182: my $name;
183: foreach my $pattern (split(',',$acc)) {
184: if ($pattern =~ /\*$/) {
185: #35.8.*
186: $pattern=~s/\*//;
187: if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
188: } elsif ($pattern =~ /(\d+\.\d+\.\d+)\.\[(\d+)-(\d+)\]$/) {
189: #35.8.3.[34-56]
190: my $low=$2;
191: my $high=$3;
192: $pattern=$1;
193: if ($ip =~ /^\Q$pattern\E/) {
194: my $last=(split(/\./,$ip))[3];
195: if ($last <=$high && $last >=$low) { $allowed=1; }
196: }
197: } elsif ($pattern =~ /^\*/) {
198: #*.msu.edu
199: $pattern=~s/\*//;
200: if (!defined($name)) {
201: use Socket;
202: my $netaddr=inet_aton($ip);
203: ($name)=gethostbyaddr($netaddr,AF_INET);
204: }
205: if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
206: } elsif ($pattern =~ /\d+\.\d+\.\d+\.\d+/) {
207: #127.0.0.1
208: if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
209: } else {
210: #some.name.com
211: if (!defined($name)) {
212: use Socket;
213: my $netaddr=inet_aton($ip);
214: ($name)=gethostbyaddr($netaddr,AF_INET);
215: }
216: if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
217: }
218: if ($allowed) { last; }
219: }
220: return $allowed;
221: }
222:
223: sub check_task_access {
224: #does it pass normal muster
225: my ($status,$datemsg)=&check_access;
226: if ($status eq 'SHOW_ANSWER' ||
227: $status eq 'CLOSED' ||
228: $status eq 'CANNOT_ANSWER' ||
229: $status eq 'INVALID_ACCESS' ||
230: $status eq 'UNAVAILABLE') {
231: return ($status,$datemsg);
232: }
233: if ($env{'request.state'} eq "construct") {
234: return ($status,$datemsg);
235: }
236:
237: my ($id)=@_;
238: my @slots=split(':',&Apache::lonnet::EXT("resource.$id.available"));
239: # if (!@slots) {
240: # return ($status,$datemsg);
241: # }
242: my $slotstatus='NOT_IN_A_SLOT';
243: my $returned_slot;
244: foreach my $slot (@slots) {
245: &Apache::lonxml::debug("getting $slot");
246: my %slot=&Apache::lonnet::get_slot($slot);
247: &Apache::lonhomework::showhash(%slot);
248: if ($slot{'starttime'} < time &&
249: $slot{'endtime'} > time &&
250: &check_ip_acc($slot{'ip'})) {
251: &Apache::lonxml::debug("$slot is good");
252: $slotstatus='NEEDS_CHECKIN';
253: $returned_slot=\%slot;
254: last;
255: }
256: }
257: if ($slotstatus eq 'NEEDS_CHECKIN' &&
258: &proctor_checked_in($returned_slot)) {
259: &Apache::lonxml::debug("protoctor checked in");
260: $slotstatus='CAN_ANSWER';
261: }
262: return ($slotstatus,$datemsg,$returned_slot);
263: }
264:
265: # JB, 9/24/2002: Any changes in this function may require a change
266: # in lonnavmaps::resource::getDateStatus.
267: sub check_access {
268: my ($id) = @_;
269: my $date ='';
270: my $status;
271: my $datemsg = '';
272: my $lastdate = '';
273: my $temp;
274: my $type;
275: my $passed;
276:
277: if ($env{'request.state'} eq "construct") {
278: if ($env{'form.problemstate'}) {
279: if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
280: if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct' &&
281: lc($Apache::lonhomework::problemstatus) eq 'no')) {
282: return ('CANNOT_ANSWER',
283: &mt('is in this state due to author settings.'));
284: }
285: } else {
286: return ($env{'form.problemstate'},
287: &mt('is in this state due to author settings.'));
288: }
289: }
290: &Apache::lonxml::debug("in construction ignoring dates");
291: $status='CAN_ANSWER';
292: $datemsg=&mt('is in under construction');
293: # return ($status,$datemsg);
294: }
295:
296: &Apache::lonxml::debug("checking for part :$id:");
297: &Apache::lonxml::debug("time:".time);
298:
299: if ($env{'request.state'} ne "construct") {
300: my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
301: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
302: $status='INVALID_ACCESS';
303: $date=&mt("can not be accessed from your location.");
304: return($status,$date);
305: }
306:
307: foreach $temp ("opendate","duedate","answerdate") {
308: $lastdate = $date;
309: $date = &Apache::lonnet::EXT("resource.$id.$temp");
310: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
311: if ($thistype =~ /^(con_lost|no_such_host)/ ||
312: $date =~ /^(con_lost|no_such_host)/) {
313: $status='UNAVAILABLE';
314: $date=&mt("may open later.");
315: return($status,$date);
316: }
317: if ($thistype eq 'date_interval') {
318: if ($temp eq 'opendate') {
319: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
320: }
321: if ($temp eq 'answerdate') {
322: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
323: }
324: }
325: &Apache::lonxml::debug("found :$date: for :$temp:");
326: if ($date eq '') {
327: $date = &mt("an unknown date"); $passed = 0;
328: } elsif ($date eq 'con_lost') {
329: $date = &mt("an indeterminate date"); $passed = 0;
330: } else {
331: if (time < $date) { $passed = 0; } else { $passed = 1; }
332: $date = localtime $date;
333: }
334: if (!$passed) { $type=$temp; last; }
335: }
336: &Apache::lonxml::debug("have :$type:$passed:");
337: if ($passed) {
338: $status='SHOW_ANSWER';
339: $datemsg=$date;
340: } elsif ($type eq 'opendate') {
341: $status='CLOSED';
342: $datemsg = &mt("will open on")." $date";
343: } elsif ($type eq 'duedate') {
344: $status='CAN_ANSWER';
345: $datemsg = &mt("is due at")." $date";
346: } elsif ($type eq 'answerdate') {
347: $status='CLOSED';
348: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
349: }
350: }
351: if ($status eq 'CAN_ANSWER') {
352: #check #tries, and if correct.
353: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
354: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
355: if ( $tries eq '' ) { $tries = '0'; }
356: if ( $maxtries eq '' &&
357: $env{'request.state'} ne 'construct') { $maxtries = '2'; }
358: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
359: # if (correct and show prob status) or excused then CANNOT_ANSWER
360: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
361: &&
362: lc($Apache::lonhomework::problemstatus) ne 'no')
363: ||
364: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
365: $status = 'CANNOT_ANSWER';
366: }
367: }
368: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
369: my $interval=&Apache::lonnet::EXT("resource.$id.interval");
370: &Apache::lonxml::debug("looking for interval $interval");
371: if ($interval) {
372: my $first_access=&Apache::lonnet::get_first_access('map');
373: &Apache::lonxml::debug("looking for accesstime $first_access");
374: if (!$first_access) {
375: $status='NOT_YET_VIEWED';
376: $datemsg=&seconds_to_human_length($interval);
377: } else {
378: my $newdate=localtime($first_access+$interval);
379: if (time > ($first_access+$interval)) {
380: $status='CLOSED';
381: $datemsg = &mt("was due on")." $newdate".&mt(", and answers will be available on")." $date";
382: } else {
383: $datemsg = &mt("is due at")." $newdate";
384: }
385: }
386: }
387: }
388: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
389: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
390: # return ('UNCHECKEDOUT','needs to be checked out');
391: #}
392:
393:
394: &Apache::lonxml::debug("sending back :$status:$datemsg:");
395: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
396: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
397: $status='CAN_ANSWER';
398: $datemsg=&mt('is closed but you are allowed to view it');
399: }
400:
401: return ($status,$datemsg);
402: }
403:
404: sub seconds_to_human_length {
405: my ($length)=@_;
406:
407: my $seconds=$length%60; $length=int($length/60);
408: my $minutes=$length%60; $length=int($length/60);
409: my $hours=$length%24; $length=int($length/24);
410: my $days=$length;
411:
412: my $timestr;
413: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
414: if ($hours > 0) { $timestr.=($timestr?", ":"").
415: &mt('[quant,_1,hour]',$hours); }
416: if ($minutes > 0) { $timestr.=($timestr?", ":"").
417: &mt('[quant,_1,minute]',$minutes); }
418: if ($seconds > 0) { $timestr.=($timestr?", ":"").
419: &mt('[quant,_1,second]',$seconds); }
420: return $timestr;
421: }
422:
423: sub showhash {
424: my (%hash) = @_;
425: &showhashsubset(\%hash,'.');
426: return '';
427: }
428:
429: sub showarray {
430: my ($array)=@_;
431: my $string="(";
432: foreach my $elm (@{ $array }) {
433: if (ref($elm) eq 'ARRAY') {
434: $string.=&showarray($elm);
435: } elsif (ref($elm) eq 'HASH') {
436: $string.= "HASH --- \n<br />";
437: $string.= &showhashsubset($elm,'.');
438: } else {
439: $string.="$elm,"
440: }
441: }
442: chop($string);
443: $string.=")";
444: return $string;
445: }
446:
447: sub showhashsubset {
448: my ($hash,$keyre) = @_;
449: my $resultkey;
450: foreach $resultkey (sort keys %$hash) {
451: if ($resultkey !~ /$keyre/) { next; }
452: if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
453: &Apache::lonxml::debug("$resultkey ---- ".
454: &showarray($$hash{$resultkey}));
455: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
456: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
457: &showhashsubset($$hash{$resultkey},'.');
458: } else {
459: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
460: }
461: }
462: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
463: return '';
464: }
465:
466: sub setuppermissions {
467: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
468: my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
469: if (! $viewgrades &&
470: exists($env{'request.course.sec'}) &&
471: $env{'request.course.sec'} !~ /^\s*$/) {
472: $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
473: '/'.$env{'request.course.sec'});
474: }
475: $Apache::lonhomework::viewgrades = $viewgrades; # File global variable...dirt.
476: if ($Apache::lonhomework::browse eq 'F' &&
477: $env{'form.devalidatecourseresdata'} eq 'on') {
478: my (undef,$courseid) = &Apache::lonxml::whichuser();
479: &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
480: $env{"course.$courseid.domain"});
481: }
482: return ''
483: }
484:
485: sub setupheader {
486: my $request=$_[0];
487: &Apache::loncommon::content_type($request,'text/html');
488: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
489: &Apache::loncommon::no_cache($request);
490: }
491: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
492: # 'lastrevisiondate'));
493: $request->send_http_header;
494: return OK if $request->header_only;
495: return ''
496: }
497:
498: sub handle_save_or_undo {
499: my ($request,$problem,$result) = @_;
500: my $file = &Apache::lonnet::filelocation("",$request->uri);
501: my $filebak =$file.".bak";
502: my $filetmp =$file.".tmp";
503: my $error=0;
504:
505: &Apache::lonnet::correct_line_ends($result);
506:
507: if ($env{'form.Undo'} eq &mt('undo')) {
508: my $error=0;
509: if (!copy($file,$filetmp)) { $error=1; }
510: if ((!$error) && (!copy($filebak,$file))) { $error=1; }
511: if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
512: if (!$error) {
513: &Apache::lonxml::info("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");
514: } else {
515: &Apache::lonxml::info("<p><font color=\"red\" size=\"+1\"><b>".&mt("Unable to undo, unable to switch")." $filebak ".&mt("and")." $file</b></font></p>");
516: $error=1;
517: }
518: } else {
519: my $fs=Apache::File->new(">$filebak");
520: if (defined($fs)) {
521: print $fs $$problem;
522: &Apache::lonxml::info("<b>".&mt("Making Backup to").
523: " $filebak</b>");
524: } else {
525: &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");
526: $error=2;
527: }
528: my $fh=Apache::File->new(">$file");
529: if (defined($fh)) {
530: print $fh $$result;
531: &Apache::lonxml::info("<b>".&mt("Saving Modifications to").
532: " $file</b>");
533: } else {
534: &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".
535: &mt("Unable to write to")." $file</b></font>");
536: $error|=4;
537: }
538: }
539: return $error;
540: }
541:
542: sub analyze_header {
543: my ($request) = @_;
544: my $bodytag='<body bgcolor="#ffffff">';
545: if ($env{'environment.remote'} eq 'off') {
546: $bodytag=&Apache::loncommon::bodytag();
547: }
548: my $html=&Apache::lonxml::xmlbegin();
549: my $result.=$html.'
550: <head><title>'.&mt("Analyzing a problem").'</title></head>
551: '.$bodytag.&Apache::lonxml::message_location().'
552: <form name="lonhomework" method="POST" action="'.
553: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
554: &Apache::structuretags::remember_problem_state().'
555: <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
556: <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
557: <hr />
558: <input type="submit" name="submit" value="'.&mt("View").'" />
559: <hr />
560: </form>';
561: &Apache::lonxml::add_messages(\$result);
562: $request->print($result);
563: $request->rflush();
564: }
565:
566: sub analyze_footer {
567: my ($request) = @_;
568: my $result='</body></html>';
569: $request->print($result);
570: $request->rflush();
571: }
572:
573: sub analyze {
574: my ($request,$file) = @_;
575: &Apache::lonxml::debug("Analyze");
576: my $result;
577: my %overall;
578: my %allparts;
579: my $rndseed=$env{'form.rndseed'};
580: &analyze_header($request);
581: my %prog_state=
582: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
583: &mt('Getting Problem Variants'),
584: $env{'form.numtoanalyze'},
585: 'inline',undef);
586: for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
587: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
588: &mt('last problem'));
589: if (&Apache::loncommon::connection_aborted($request)) { return; }
590: my $subresult=&Apache::lonnet::ssi($request->uri,
591: ('grade_target' => 'analyze'),
592: ('rndseed' => $i+$rndseed));
593: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
594: my %analyze=&Apache::lonnet::str2hash($subresult);
595: my @parts;
596: if (defined(@{ $analyze{'parts'} })) {
597: @parts=@{ $analyze{'parts'} };
598: }
599: foreach my $part (@parts) {
600: if (!exists($allparts{$part})) {$allparts{$part}=1;};
601: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
602: $analyze{$part.'.type'} eq 'stringresponse' ||
603: $analyze{$part.'.type'} eq 'formularesponse' ) {
604: push( @{ $overall{$part.'.answer'} },
605: [@{ $analyze{$part.'.answer'} }]);
606: }
607: }
608: }
609: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
610: &mt('Analyzing Results'));
611: $request->print('<hr />'.&mt('List of possible answers').': ');
612: foreach my $part (sort(keys(%allparts))) {
613: if (defined(@{ $overall{$part.'.answer'} })) {
614: my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
615: $request->print('<table><tr><th colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</th></tr>');
616: my %frequency;
617: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
618: $frequency{join("\0",@{ $answer })}++;
619: }
620: $request->print('<tr><th colspan="'.($num_cols).'">'.&mt('Answer').'</th><th>'.&mt('Frequency').'</th></tr>');
621: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
622: $request->print('<tr><td align="right">'.
623: join('</td><td align="right">',split("\0",$answer)).
624: '</td><td>('.$frequency{$answer}.
625: ')</td></tr>');
626: }
627: $request->print('</table>');
628: } else {
629: $request->print('<p>'.&mt('Response').' '.$part.' '.
630: &mt('is not analyzable at this time').'</p>');
631: }
632: }
633: if (scalar(keys(%allparts)) == 0 ) {
634: $request->print('<p>'.&mt('Found no analyzable respones in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
635: }
636: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
637: &analyze_footer($request);
638: &Apache::lonhomework::showhash(%overall);
639: return $result;
640: }
641:
642: sub editxmlmode {
643: my ($request,$file) = @_;
644: my $result;
645: my $problem=&Apache::lonnet::getfile($file);
646: if ($problem eq -1) {
647: &Apache::lonxml::error("<b> ".&mt('Unable to find').
648: " <i>$file</i></b>");
649: $problem='';
650: }
651: if (defined($env{'form.editxmltext'}) || defined($env{'form.Undo'})) {
652: my $error=&handle_save_or_undo($request,\$problem,
653: \$env{'form.editxmltext'});
654: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
655: }
656: &Apache::lonhomework::showhashsubset(\%env,'^form');
657: if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
658: &Apache::lonhomework::showhashsubset(\%env,'^form');
659: $env{'form.problemmode'}='View';
660: &renderpage($request,$file);
661: } else {
662: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
663: my $xml_help = '<table><tr><td>'.
664: &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
665: "Problem Editing Help").
666: '</td><td>'.
667: &Apache::loncommon::help_open_menu('',undef,undef,undef,5,'Authoring').
668: '</td></tr></table>';
669: if ($cols > 80) { $cols = 80; }
670: if ($cols < 70) { $cols = 70; }
671: if ($rows < 20) { $rows = 20; }
672: my $bodytag='<body bgcolor="#ffffff">';
673: if ($env{'environment.remote'} eq 'off') {
674: $bodytag=&Apache::loncommon::bodytag();
675: }
676: my $html=&Apache::lonxml::xmlbegin();
677: $result.=$html.$bodytag.&Apache::lonxml::message_location().'
678: <form name="lonhomework" method="POST" action="'.
679: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
680: &Apache::structuretags::remember_problem_state().'
681: <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
682: <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
683: <input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
684: <hr />
685: <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
686: <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
687: <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
688: <hr />
689: ' . $xml_help . '
690: <textarea style="width:100%" rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
691: &HTML::Entities::encode($problem,'<>&"').'</textarea>
692: </form></body></html>';
693: &Apache::lonxml::add_messages(\$result);
694: $request->print($result);
695: }
696: return '';
697: }
698:
699: #
700: # Render the page in whatever target desired.
701: #
702: sub renderpage {
703: my ($request,$file) = @_;
704:
705: my (@targets) = &get_target();
706: &Apache::lonhomework::showhashsubset(\%env,'form.');
707: &Apache::lonxml::debug("Running targets ".join(':',@targets));
708: my $overall_result;
709: foreach my $target (@targets) {
710: # FIXME need to do something intelligent when a problem goes
711: # from viewable to not viewable due to map conditions
712: #&setuppermissions();
713: #if ( $Apache::lonhomework::browse ne '2'
714: # && $Apache::lonhomework::browse ne 'F' ) {
715: # $request->print(" You most likely shouldn't see me.");
716: #}
717: #my $t0 = [&gettimeofday()];
718: my $problem=&Apache::lonnet::getfile($file);
719: if ($problem eq -1) {
720: &Apache::lonxml::error("<b> ".&mt('Unable to find')." <i>$file</i></b>");
721: $problem='';
722: }
723:
724: my %mystyle;
725: my $result = '';
726: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
727: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
728: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
729:
730: &Apache::lonxml::debug("Should be parsing now");
731: $result = &Apache::lonxml::xmlparse($request, $target, $problem,
732: &setup_vars($target),%mystyle);
733: undef($Apache::lonhomework::parsing_a_problem);
734: #$request->print("Result follows:");
735: if ($target eq 'modified') {
736: &handle_save_or_undo($request,\$problem,\$result);
737: } else {
738: if ($target eq 'analyze') {
739: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
740: undef(%Apache::lonhomework::analyze);
741: }
742: #my $td=&tv_interval($t0);
743: #if ( $Apache::lonxml::debug) {
744: #$result =~ s:</body>::;
745: #$result.="<br />Spent $td seconds processing target $target\n</body>";
746: #}
747: # $request->print($result);
748: $overall_result.=$result;
749: # $request->rflush();
750: }
751: #$request->print(":Result ends");
752: #my $td=&tv_interval($t0);
753: }
754: &Apache::lonxml::add_messages(\$overall_result);
755: $request->print($overall_result);
756: $request->rflush();
757: }
758:
759: # with no arg it returns a HTML <option> list of the template titles
760: # with one arg it returns the filename associated with the arg passed
761: sub get_template_list {
762: my ($namewanted,$extension) = @_;
763: my $result;
764: my @allnames;
765: &Apache::lonxml::debug("Looking for :$extension:");
766: foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
767: my $name=&Apache::lonnet::metadata($file,'title');
768: if ($namewanted && ($name eq $namewanted)) {
769: $result=$file;
770: last;
771: } else {
772: if ($name) { push (@allnames, $name); }
773: }
774: }
775: if (@allnames && !$result) {
776: $result="<option>".&mt("Select a")." $extension ".&mt('template')."</option>\n<option>".
777: join('</option><option>',sort(@allnames)).'</option>';
778: }
779: return $result;
780: }
781:
782: sub newproblem {
783: my ($request) = @_;
784: my $extension=$request->uri;
785: $extension=~s:^.*\.([\w]+)$:$1:;
786: &Apache::lonxml::debug("Looking for :$extension:");
787: my $templatelist=&get_template_list('',$extension);
788: if ($env{'form.template'} &&
789: $env{'form.template'} ne "Select a $extension template") {
790: use File::Copy;
791: my $file = &get_template_list($env{'form.template'},$extension);
792: my $dest = &Apache::lonnet::filelocation("",$request->uri);
793: copy($file,$dest);
794: &renderpage($request,$dest);
795: } elsif($env{'form.newfile'} && !$templatelist) {
796: # I don't like hard-coded filenames but for now, this will work.
797: use File::Copy;
798: my $templatefilename =
799: $request->dir_config('lonIncludes').'/templates/blank.problem';
800: &Apache::lonxml::debug("$templatefilename");
801: my $dest = &Apache::lonnet::filelocation("",$request->uri);
802: copy($templatefilename,$dest);
803: &renderpage($request,$dest);
804: } else {
805: my $url=&HTML::Entities::encode($request->uri,'<>&"');
806: my $shownurl=$url;
807: $shownurl=~s-^/~-/priv/-;
808: my $dest = &Apache::lonnet::filelocation("",$request->uri);
809: my $errormsg;
810: if ($env{'form.newfile'}) {
811: $errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";
812: }
813: my $instructions;
814: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,
815: ($env{'environment.remote'} ne 'off'));
816: if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}
817: my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',
818: 'resource' => 'resource',
819: 'requested' => 'The requested file',
820: 'not exist' => 'currently does not exist',
821: 'createnew' => 'To create a new',
822: 'click' => 'click on the',
823: 'Create' => 'Create',
824: 'button' => 'button');
825: $request->print(<<ENDNEWPROBLEM);
826: $bodytag
827: <h1>$lt{'create'} $extension $lt{'resource'}</h1>
828: $errormsg
829: $lt{'requested'} <tt>$shownurl</tt> $lt{'not exist'}.
830: <p>
831: <b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>
832: </p>
833: <p><form action="$url" method="POST">
834: ENDNEWPROBLEM
835: if (defined($templatelist)) {
836: $request->print("<select name=\"template\">$templatelist</select>");
837: }
838: $request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");
839: $request->print("</form></p></body>");
840: }
841: return '';
842: }
843:
844: sub view_or_edit_menu {
845: my ($request) = @_;
846: my $url=&HTML::Entities::encode($request->uri,'<>&"');
847: my %lt=&Apache::lonlocal::texthash( 'would' => 'Would you like to',
848: 'view' => 'View',
849: 'Edit' => 'edit',
850: 'or' => 'or',
851: 'the problem' => 'the problem');
852: $request->print(<<EDITMENU);
853: <body bgcolor="#FFFFFF">
854: <form action="$url" method="POST">
855: $lt{'would'} <input type="submit" name="problemmode" accesskey="v" value="<{'view'}">
856: <{'or'} <input type="submit" name="problemmode" accesskey="e" value="<{'Edit'}">
857: <{'the problem'}.
858: </form>
859: </body>
860: EDITMENU
861: }
862:
863: sub handler {
864: #my $t0 = [&gettimeofday()];
865: my $request=$_[0];
866:
867: $Apache::lonxml::debug=$env{'user.debug'};
868: $env{'request.uri'}=$request->uri;
869: &setuppermissions();
870: # some times multiple problemmodes are submitted, need to select
871: # the last one
872: if ( defined($env{'form.problemmode'}) && ref($env{'form.problemmode'}) ) {
873: my $mode=$env{'form.problemmode'}->[-1];
874: undef $env{'form.problemmode'};
875: $env{'form.problemmode'}=$mode;
876: }
877:
878: my $file=&Apache::lonnet::filelocation("",$request->uri);
879:
880: #check if we know where we are
881: if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) {
882: # if we are browsing we might not be able to know where we are
883: if ($Apache::lonhomework::browse ne 'F' &&
884: $env{'request.state'} ne "construct") {
885: #should know where we are, so ask
886: if ( &Apache::lonnet::mod_perl_version() == 2 ) {
887: &Apache::lonnet::cleanenv();
888: }
889: &Apache::lonnet::logthis(&Apache::lonnet::mod_perl_version());
890: $request->internal_redirect('/adm/ambiguous'); return OK;
891: }
892: }
893: if (&setupheader($request)) { return OK; }
894: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
895: &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
896: my ($symb) = &Apache::lonxml::whichuser();
897: &Apache::lonxml::debug('symb is '.$symb);
898: if ($env{'request.state'} eq "construct" || $symb eq '') {
899: if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
900: $env{'form.resetdata'} eq &mt('New Problem Variation') ||
901: $env{'form.newrandomization'} eq &mt('New Randomization')) {
902: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
903: &Apache::lonnet::tmpreset($symb,'',$domain,$name);
904: &Apache::lonxml::debug("Attempt reset");
905: }
906: }
907: if ($env{'request.state'} eq "construct") {
908: if ( -e $file ) {
909: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
910: ['problemmode']);
911: if (!(defined $env{'form.problemmode'})) {
912: #first visit to problem in construction space
913: #&view_or_edit_menu($request);
914: $env{'form.problemmode'}='View';
915: &renderpage($request,$file);
916: } elsif ($env{'form.problemmode'} eq &mt('EditXML') ||
917: $env{'form.problemmode'} eq 'EditXML') {
918: &editxmlmode($request,$file);
919: } elsif ($env{'form.problemmode'} eq &mt('Calculate answers')) {
920: &analyze($request,$file);
921: } else {
922: &renderpage($request,$file);
923: }
924: } else {
925: # requested file doesn't exist in contruction space
926: &newproblem($request);
927: }
928: } else {
929: # just render the page normally outside of construction space
930: &Apache::lonxml::debug("not construct");
931: &renderpage($request,$file);
932: }
933: #my $td=&tv_interval($t0);
934: #&Apache::lonxml::debug("Spent $td seconds processing");
935: # &Apache::lonhomework::send_footer($request);
936: # always turn off debug messages
937: $Apache::lonxml::debug=0;
938: return OK;
939:
940: }
941:
942: 1;
943: __END__
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