1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.197 2005/03/01 03:24:05 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: $Apache::lonxml::browse='';
166:
167: sub check_ip_acc {
168: my ($acc)=@_;
169: if (!defined($acc) || $acc =~ /^\s*$/) { return 1; }
170: my $allowed=0;
171: my $ip=$ENV{'REMOTE_ADDR'};
172: my $name;
173: foreach my $pattern (split(',',$acc)) {
174: if ($pattern =~ /\*$/) {
175: #35.8.*
176: $pattern=~s/\*//;
177: if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
178: } elsif ($pattern =~ /(\d+\.\d+\.\d+)\.\[(\d+)-(\d+)\]$/) {
179: #35.8.3.[34-56]
180: my $low=$2;
181: my $high=$3;
182: $pattern=$1;
183: if ($ip =~ /^\Q$pattern\E/) {
184: my $last=(split(/\./,$ip))[3];
185: if ($last <=$high && $last >=$low) { $allowed=1; }
186: }
187: } elsif ($pattern =~ /^\*/) {
188: #*.msu.edu
189: $pattern=~s/\*//;
190: if (!defined($name)) {
191: use Socket;
192: my $netaddr=inet_aton($ip);
193: ($name)=gethostbyaddr($netaddr,AF_INET);
194: }
195: if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
196: } elsif ($pattern =~ /\d+\.\d+\.\d+\.\d+/) {
197: #127.0.0.1
198: if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
199: } else {
200: #some.name.com
201: if (!defined($name)) {
202: use Socket;
203: my $netaddr=inet_aton($ip);
204: ($name)=gethostbyaddr($netaddr,AF_INET);
205: }
206: if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
207: }
208: if ($allowed) { last; }
209: }
210: return $allowed;
211: }
212: # JB, 9/24/2002: Any changes in this function may require a change
213: # in lonnavmaps::resource::getDateStatus.
214: sub check_access {
215: my ($id) = @_;
216: my $date ='';
217: my $status;
218: my $datemsg = '';
219: my $lastdate = '';
220: my $temp;
221: my $type;
222: my $passed;
223:
224: if ($ENV{'request.state'} eq "construct") {
225: if ($ENV{'form.problemstate'}) {
226: if ($ENV{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
227: if ( ! ($ENV{'form.problemstate'} eq 'CANNOT_ANSWER_correct' &&
228: lc($Apache::lonhomework::problemstatus) eq 'no')) {
229: return ('CANNOT_ANSWER',
230: &mt('is in this state due to author settings.'));
231: }
232: } else {
233: return ($ENV{'form.problemstate'},
234: &mt('is in this state due to author settings.'));
235: }
236: }
237: &Apache::lonxml::debug("in construction ignoring dates");
238: $status='CAN_ANSWER';
239: $datemsg=&mt('is in under construction');
240: # return ($status,$datemsg);
241: }
242:
243: &Apache::lonxml::debug("checking for part :$id:");
244: &Apache::lonxml::debug("time:".time);
245:
246: if ($ENV{'request.state'} ne "construct") {
247: my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
248: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
249: $status='INVALID_ACCESS';
250: $date=&mt("can not be accessed from your location.");
251: return($status,$date);
252: }
253:
254: foreach $temp ("opendate","duedate","answerdate") {
255: $lastdate = $date;
256: $date = &Apache::lonnet::EXT("resource.$id.$temp");
257: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
258: if ($thistype =~ /^(con_lost|no_such_host)/ ||
259: $date =~ /^(con_lost|no_such_host)/) {
260: $status='UNAVAILABLE';
261: $date=&mt("may open later.");
262: return($status,$date);
263: }
264: if ($thistype eq 'date_interval') {
265: if ($temp eq 'opendate') {
266: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
267: }
268: if ($temp eq 'answerdate') {
269: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
270: }
271: }
272: &Apache::lonxml::debug("found :$date: for :$temp:");
273: if ($date eq '') {
274: $date = &mt("an unknown date"); $passed = 0;
275: } elsif ($date eq 'con_lost') {
276: $date = &mt("an indeterminate date"); $passed = 0;
277: } else {
278: if (time < $date) { $passed = 0; } else { $passed = 1; }
279: $date = localtime $date;
280: }
281: if (!$passed) { $type=$temp; last; }
282: }
283: &Apache::lonxml::debug("have :$type:$passed:");
284: if ($passed) {
285: $status='SHOW_ANSWER';
286: $datemsg=$date;
287: } elsif ($type eq 'opendate') {
288: $status='CLOSED';
289: $datemsg = &mt("will open on")." $date";
290: } elsif ($type eq 'duedate') {
291: $status='CAN_ANSWER';
292: $datemsg = &mt("is due at")." $date";
293: } elsif ($type eq 'answerdate') {
294: $status='CLOSED';
295: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
296: }
297: }
298: if ($status eq 'CAN_ANSWER') {
299: #check #tries, and if correct.
300: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
301: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
302: if ( $tries eq '' ) { $tries = '0'; }
303: if ( $maxtries eq '' &&
304: $ENV{'request.state'} ne 'construct') { $maxtries = '2'; }
305: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
306: # if (correct and show prob status) or excused then CANNOT_ANSWER
307: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
308: &&
309: lc($Apache::lonhomework::problemstatus) ne 'no')
310: ||
311: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
312: $status = 'CANNOT_ANSWER';
313: }
314: }
315: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
316: my $interval=&Apache::lonnet::EXT("resource.$id.interval");
317: &Apache::lonxml::debug("looking for interval $interval");
318: if ($interval) {
319: my $first_access=&Apache::lonnet::get_first_access('map');
320: &Apache::lonxml::debug("looking for accesstime $first_access");
321: if (!$first_access) {
322: $status='NOT_YET_VIEWED';
323: $datemsg=&seconds_to_human_length($interval);
324: } else {
325: my $newdate=localtime($first_access+$interval);
326: if (time > ($first_access+$interval)) {
327: $status='CLOSED';
328: $datemsg = &mt("was due on")." $newdate".&mt(", and answers will be available on")." $date";
329: } else {
330: $datemsg = &mt("is due at")." $newdate";
331: }
332: }
333: }
334: }
335: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
336: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
337: # return ('UNCHECKEDOUT','needs to be checked out');
338: #}
339:
340:
341: &Apache::lonxml::debug("sending back :$status:$datemsg:");
342: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
343: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
344: $status='CAN_ANSWER';
345: $datemsg=&mt('is closed but you are allowed to view it');
346: }
347:
348: return ($status,$datemsg);
349: }
350:
351: sub seconds_to_human_length {
352: my ($length)=@_;
353:
354: my $seconds=$length%60; $length=int($length/60);
355: my $minutes=$length%60; $length=int($length/60);
356: my $hours=$length%24; $length=int($length/24);
357: my $days=$length;
358:
359: my $timestr;
360: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
361: if ($hours > 0) { $timestr.=($timestr?", ":"").
362: &mt('[quant,_1,hour]',$hours); }
363: if ($minutes > 0) { $timestr.=($timestr?", ":"").
364: &mt('[quant,_1,minute]',$minutes); }
365: if ($seconds > 0) { $timestr.=($timestr?", ":"").
366: &mt('[quant,_1,second]',$seconds); }
367: return $timestr;
368: }
369:
370: sub showhash {
371: my (%hash) = @_;
372: &showhashsubset(\%hash,'.');
373: return '';
374: }
375:
376: sub showarray {
377: my ($array)=@_;
378: my $string="(";
379: foreach my $elm (@{ $array }) {
380: if (ref($elm) eq 'ARRAY') {
381: $string.=&showarray($elm);
382: } elsif (ref($elm) eq 'HASH') {
383: $string.= "HASH --- \n<br />";
384: $string.= &showhashsubset($elm,'.');
385: } else {
386: $string.="$elm,"
387: }
388: }
389: chop($string);
390: $string.=")";
391: return $string;
392: }
393:
394: sub showhashsubset {
395: my ($hash,$keyre) = @_;
396: my $resultkey;
397: foreach $resultkey (sort keys %$hash) {
398: if ($resultkey !~ /$keyre/) { next; }
399: if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
400: &Apache::lonxml::debug("$resultkey ---- ".
401: &showarray($$hash{$resultkey}));
402: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
403: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
404: &showhashsubset($$hash{$resultkey},'.');
405: } else {
406: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
407: }
408: }
409: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
410: return '';
411: }
412:
413: sub setuppermissions {
414: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
415: my $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
416: if (! $viewgrades &&
417: exists($ENV{'request.course.sec'}) &&
418: $ENV{'request.course.sec'} !~ /^\s*$/) {
419: $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}.
420: '/'.$ENV{'request.course.sec'});
421: }
422: $Apache::lonhomework::viewgrades = $viewgrades; # File global variable...dirt.
423: if ($Apache::lonhomework::browse eq 'F' &&
424: $ENV{'form.devalidatecourseresdata'} eq 'on') {
425: my (undef,$courseid) = &Apache::lonxml::whichuser();
426: &Apache::lonnet::devalidatecourseresdata($ENV{"course.$courseid.num"},
427: $ENV{"course.$courseid.domain"});
428: }
429: return ''
430: }
431:
432: sub setupheader {
433: my $request=$_[0];
434: &Apache::loncommon::content_type($request,'text/html');
435: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
436: &Apache::loncommon::no_cache($request);
437: }
438: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
439: # 'lastrevisiondate'));
440: $request->send_http_header;
441: return OK if $request->header_only;
442: return ''
443: }
444:
445: sub handle_save_or_undo {
446: my ($request,$problem,$result) = @_;
447: my $file = &Apache::lonnet::filelocation("",$request->uri);
448: my $filebak =$file.".bak";
449: my $filetmp =$file.".tmp";
450: my $error=0;
451:
452: &Apache::lonnet::correct_line_ends($result);
453:
454: if ($ENV{'form.Undo'} eq &mt('undo')) {
455: my $error=0;
456: if (!copy($file,$filetmp)) { $error=1; }
457: if ((!$error) && (!copy($filebak,$file))) { $error=1; }
458: if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
459: if (!$error) {
460: &Apache::lonxml::info("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");
461: } else {
462: &Apache::lonxml::info("<p><font color=\"red\" size=\"+1\"><b>".&mt("Unable to undo, unable to switch")." $filebak ".&mt("and")." $file</b></font></p>");
463: $error=1;
464: }
465: } else {
466: my $fs=Apache::File->new(">$filebak");
467: if (defined($fs)) {
468: print $fs $$problem;
469: &Apache::lonxml::info("<b>".&mt("Making Backup to").
470: " $filebak</b>");
471: } else {
472: &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");
473: $error=2;
474: }
475: my $fh=Apache::File->new(">$file");
476: if (defined($fh)) {
477: print $fh $$result;
478: &Apache::lonxml::info("<b>".&mt("Saving Modifications to").
479: " $file</b>");
480: } else {
481: &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".
482: &mt("Unable to write to")." $file</b></font>");
483: $error|=4;
484: }
485: }
486: return $error;
487: }
488:
489: sub analyze_header {
490: my ($request) = @_;
491: my $bodytag='<body bgcolor="#ffffff">';
492: if ($ENV{'environment.remote'} eq 'off') {
493: $bodytag=&Apache::loncommon::bodytag();
494: }
495: my $html=&Apache::lonxml::xmlbegin();
496: my $result.=$html.'
497: <head><title>'.&mt("Analyzing a problem").'</title></head>
498: '.$bodytag.&Apache::lonxml::message_location().'
499: <form name="lonhomework" method="POST" action="'.
500: &HTML::Entities::encode($ENV{'request.uri'},'<>&"').'">'.
501: &Apache::structuretags::remember_problem_state().'
502: <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
503: <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
504: <hr />
505: <input type="submit" name="submit" value="'.&mt("View").'" />
506: <hr />
507: </form>';
508: &Apache::lonxml::add_messages(\$result);
509: $request->print($result);
510: $request->rflush();
511: }
512:
513: sub analyze_footer {
514: my ($request) = @_;
515: my $result='</body></html>';
516: $request->print($result);
517: $request->rflush();
518: }
519:
520: sub analyze {
521: my ($request,$file) = @_;
522: &Apache::lonxml::debug("Analyze");
523: my $result;
524: my %overall;
525: my %allparts;
526: my $rndseed=$ENV{'form.rndseed'};
527: &analyze_header($request);
528: my %prog_state=
529: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
530: &mt('Getting Problem Variants'),
531: $ENV{'form.numtoanalyze'},
532: 'inline',undef);
533: for(my $i=1;$i<$ENV{'form.numtoanalyze'}+1;$i++) {
534: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
535: &mt('last problem'));
536: if (&Apache::loncommon::connection_aborted($request)) { return; }
537: my $subresult=&Apache::lonnet::ssi($request->uri,
538: ('grade_target' => 'analyze'),
539: ('rndseed' => $i+$rndseed));
540: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
541: my %analyze=&Apache::lonnet::str2hash($subresult);
542: my @parts;
543: if (defined(@{ $analyze{'parts'} })) {
544: @parts=@{ $analyze{'parts'} };
545: }
546: foreach my $part (@parts) {
547: if (!exists($allparts{$part})) {$allparts{$part}=1;};
548: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
549: $analyze{$part.'.type'} eq 'stringresponse' ||
550: $analyze{$part.'.type'} eq 'formularesponse' ) {
551: push( @{ $overall{$part.'.answer'} },
552: [@{ $analyze{$part.'.answer'} }]);
553: }
554: }
555: }
556: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
557: &mt('Analyzing Results'));
558: $request->print('<hr />'.&mt('List of possible answers').': ');
559: foreach my $part (sort(keys(%allparts))) {
560: if (defined(@{ $overall{$part.'.answer'} })) {
561: my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
562: $request->print('<table><tr><th colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</th></tr>');
563: my %frequency;
564: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
565: $frequency{join("\0",@{ $answer })}++;
566: }
567: $request->print('<tr><th colspan="'.($num_cols).'">'.&mt('Answer').'</th><th>'.&mt('Frequency').'</th></tr>');
568: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
569: $request->print('<tr><td align="right">'.
570: join('</td><td align="right">',split("\0",$answer)).
571: '</td><td>('.$frequency{$answer}.
572: ')</td></tr>');
573: }
574: $request->print('</table>');
575: } else {
576: $request->print('<p>'.&mt('Response').' '.$part.' '.
577: &mt('is not analyzable at this time').'</p>');
578: }
579: }
580: if (scalar(keys(%allparts)) == 0 ) {
581: $request->print('<p>'.&mt('Found no analyzable respones in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
582: }
583: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
584: &analyze_footer($request);
585: &Apache::lonhomework::showhash(%overall);
586: return $result;
587: }
588:
589: sub editxmlmode {
590: my ($request,$file) = @_;
591: my $result;
592: my $problem=&Apache::lonnet::getfile($file);
593: if ($problem eq -1) {
594: &Apache::lonxml::error("<b> ".&mt('Unable to find').
595: " <i>$file</i></b>");
596: $problem='';
597: }
598: if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) {
599: my $error=&handle_save_or_undo($request,\$problem,
600: \$ENV{'form.editxmltext'});
601: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
602: }
603: &Apache::lonhomework::showhashsubset(\%ENV,'^form');
604: if ( $ENV{'form.submit'} eq &mt('Submit Changes and View') ) {
605: &Apache::lonhomework::showhashsubset(\%ENV,'^form');
606: $ENV{'form.problemmode'}='View';
607: &renderpage($request,$file);
608: } else {
609: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
610: my $xml_help = '<table><tr><td>'.
611: &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
612: "Problem Editing Help").
613: '</td><td>'.
614: &Apache::loncommon::help_open_menu('',undef,undef,undef,5,'Authoring').
615: '</td></tr></table>';
616: if ($cols > 80) { $cols = 80; }
617: if ($cols < 70) { $cols = 70; }
618: if ($rows < 20) { $rows = 20; }
619: my $bodytag='<body bgcolor="#ffffff">';
620: if ($ENV{'environment.remote'} eq 'off') {
621: $bodytag=&Apache::loncommon::bodytag();
622: }
623: my $html=&Apache::lonxml::xmlbegin();
624: $result.=$html.$bodytag.&Apache::lonxml::message_location().'
625: <form name="lonhomework" method="POST" action="'.
626: &HTML::Entities::encode($ENV{'request.uri'},'<>&"').'">'.
627: &Apache::structuretags::remember_problem_state().'
628: <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
629: <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
630: <input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
631: <hr />
632: <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
633: <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
634: <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
635: <hr />
636: ' . $xml_help . '
637: <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
638: &HTML::Entities::encode($problem,'<>&"').'</textarea>
639: </form></body></html>';
640: &Apache::lonxml::add_messages(\$result);
641: $request->print($result);
642: }
643: return '';
644: }
645:
646: #
647: # Render the page in whatever target desired.
648: #
649: sub renderpage {
650: my ($request,$file) = @_;
651:
652: my (@targets) = &get_target();
653: &Apache::lonhomework::showhashsubset(\%ENV,'form.');
654: &Apache::lonxml::debug("Running targets ".join(':',@targets));
655: my $overall_result;
656: foreach my $target (@targets) {
657: # FIXME need to do something intelligent when a problem goes
658: # from viewable to not viewable due to map conditions
659: #&setuppermissions();
660: #if ( $Apache::lonhomework::browse ne '2'
661: # && $Apache::lonhomework::browse ne 'F' ) {
662: # $request->print(" You most likely shouldn't see me.");
663: #}
664: #my $t0 = [&gettimeofday()];
665: my $problem=&Apache::lonnet::getfile($file);
666: if ($problem eq -1) {
667: &Apache::lonxml::error("<b> ".&mt('Unable to find')." <i>$file</i></b>");
668: $problem='';
669: }
670:
671: my %mystyle;
672: my $result = '';
673: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
674: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
675: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%ENV,'^form');}
676:
677: &Apache::lonxml::debug("Should be parsing now");
678: $result = &Apache::lonxml::xmlparse($request, $target, $problem,
679: &setup_vars($target),%mystyle);
680: undef($Apache::lonhomework::parsing_a_problem);
681: #$request->print("Result follows:");
682: if ($target eq 'modified') {
683: &handle_save_or_undo($request,\$problem,\$result);
684: } else {
685: if ($target eq 'analyze') {
686: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
687: undef(%Apache::lonhomework::analyze);
688: }
689: #my $td=&tv_interval($t0);
690: #if ( $Apache::lonxml::debug) {
691: #$result =~ s:</body>::;
692: #$result.="<br />Spent $td seconds processing target $target\n</body>";
693: #}
694: # $request->print($result);
695: $overall_result.=$result;
696: # $request->rflush();
697: }
698: #$request->print(":Result ends");
699: #my $td=&tv_interval($t0);
700: }
701: &Apache::lonxml::add_messages(\$overall_result);
702: $request->print($overall_result);
703: $request->rflush();
704: }
705:
706: # with no arg it returns a HTML <option> list of the template titles
707: # with one arg it returns the filename associated with the arg passed
708: sub get_template_list {
709: my ($namewanted,$extension) = @_;
710: my $result;
711: my @allnames;
712: &Apache::lonxml::debug("Looking for :$extension:");
713: foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
714: my $name=&Apache::lonnet::metadata($file,'title');
715: if ($namewanted && ($name eq $namewanted)) {
716: $result=$file;
717: last;
718: } else {
719: if ($name) { push (@allnames, $name); }
720: }
721: }
722: if (@allnames && !$result) {
723: $result="<option>".&mt("Select a")." $extension ".&mt('template')."</option>\n<option>".
724: join('</option><option>',sort(@allnames)).'</option>';
725: }
726: return $result;
727: }
728:
729: sub newproblem {
730: my ($request) = @_;
731: my $extension=$request->uri;
732: $extension=~s:^.*\.([\w]+)$:$1:;
733: &Apache::lonxml::debug("Looking for :$extension:");
734: my $templatelist=&get_template_list('',$extension);
735: if ($ENV{'form.template'} &&
736: $ENV{'form.template'} ne "Select a $extension template") {
737: use File::Copy;
738: my $file = &get_template_list($ENV{'form.template'},$extension);
739: my $dest = &Apache::lonnet::filelocation("",$request->uri);
740: copy($file,$dest);
741: &renderpage($request,$dest);
742: } elsif($ENV{'form.newfile'} && !$templatelist) {
743: # I don't like hard-coded filenames but for now, this will work.
744: use File::Copy;
745: my $templatefilename =
746: $request->dir_config('lonIncludes').'/templates/blank.problem';
747: &Apache::lonxml::debug("$templatefilename");
748: my $dest = &Apache::lonnet::filelocation("",$request->uri);
749: copy($templatefilename,$dest);
750: &renderpage($request,$dest);
751: } else {
752: my $url=&HTML::Entities::encode($request->uri,'<>&"');
753: my $shownurl=$url;
754: $shownurl=~s-^/~-/priv/-;
755: my $dest = &Apache::lonnet::filelocation("",$request->uri);
756: my $errormsg;
757: if ($ENV{'form.newfile'}) {
758: $errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";
759: }
760: my $instructions;
761: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,
762: ($ENV{'environment.remote'} ne 'off'));
763: if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}
764: my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',
765: 'resource' => 'resource',
766: 'requested' => 'The requested file',
767: 'not exist' => 'currently does not exist',
768: 'createnew' => 'To create a new',
769: 'click' => 'click on the',
770: 'Create' => 'Create',
771: 'button' => 'button');
772: $request->print(<<ENDNEWPROBLEM);
773: $bodytag
774: <h1>$lt{'create'} $extension $lt{'resource'}</h1>
775: $errormsg
776: $lt{'requested'} <tt>$shownurl</tt> $lt{'not exist'}.
777: <p>
778: <b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>
779: </p>
780: <p><form action="$url" method="POST">
781: ENDNEWPROBLEM
782: if (defined($templatelist)) {
783: $request->print("<select name=\"template\">$templatelist</select>");
784: }
785: $request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");
786: $request->print("</form></p></body>");
787: }
788: return '';
789: }
790:
791: sub view_or_edit_menu {
792: my ($request) = @_;
793: my $url=&HTML::Entities::encode($request->uri,'<>&"');
794: my %lt=&Apache::lonlocal::texthash( 'would' => 'Would you like to',
795: 'view' => 'View',
796: 'Edit' => 'edit',
797: 'or' => 'or',
798: 'the problem' => 'the problem');
799: $request->print(<<EDITMENU);
800: <body bgcolor="#FFFFFF">
801: <form action="$url" method="POST">
802: $lt{'would'} <input type="submit" name="problemmode" accesskey="v" value="<{'view'}">
803: <{'or'} <input type="submit" name="problemmode" accesskey="e" value="<{'Edit'}">
804: <{'the problem'}.
805: </form>
806: </body>
807: EDITMENU
808: }
809:
810: sub handler {
811: #my $t0 = [&gettimeofday()];
812: my $request=$_[0];
813:
814: $Apache::lonxml::debug=$ENV{'user.debug'};
815: $ENV{'request.uri'}=$request->uri;
816: &setuppermissions();
817: # some times multiple problemmodes are submitted, need to select
818: # the last one
819: if ( defined($ENV{'form.problemmode'}) && ref($ENV{'form.problemmode'}) ) {
820: my $mode=$ENV{'form.problemmode'}->[-1];
821: undef $ENV{'form.problemmode'};
822: $ENV{'form.problemmode'}=$mode;
823: }
824:
825: my $file=&Apache::lonnet::filelocation("",$request->uri);
826:
827: #check if we know where we are
828: if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) {
829: # if we are browsing we might not be able to know where we are
830: if ($Apache::lonhomework::browse ne 'F' &&
831: $ENV{'request.state'} ne "construct") {
832: #should know where we are, so ask
833: if ( &Apache::lonnet::mod_perl_version() == 2 ) {
834: &Apache::lonnet::cleanenv();
835: }
836: &Apache::lonnet::logthis(&Apache::lonnet::mod_perl_version());
837: $request->internal_redirect('/adm/ambiguous'); return OK;
838: }
839: }
840: if (&setupheader($request)) { return OK; }
841: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
842: &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
843: my ($symb) = &Apache::lonxml::whichuser();
844: &Apache::lonxml::debug('symb is '.$symb);
845: if ($ENV{'request.state'} eq "construct" || $symb eq '') {
846: if ($ENV{'form.resetdata'} eq &mt('Reset Submissions') ||
847: $ENV{'form.resetdata'} eq &mt('New Problem Variation') ||
848: $ENV{'form.newrandomization'} eq &mt('New Randomization')) {
849: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
850: &Apache::lonnet::tmpreset($symb,'',$domain,$name);
851: &Apache::lonxml::debug("Attempt reset");
852: }
853: }
854: if ($ENV{'request.state'} eq "construct") {
855: if ( -e $file ) {
856: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
857: ['problemmode']);
858: if (!(defined $ENV{'form.problemmode'})) {
859: #first visit to problem in construction space
860: #&view_or_edit_menu($request);
861: $ENV{'form.problemmode'}='View';
862: &renderpage($request,$file);
863: } elsif ($ENV{'form.problemmode'} eq &mt('EditXML') ||
864: $ENV{'form.problemmode'} eq 'EditXML') {
865: &editxmlmode($request,$file);
866: } elsif ($ENV{'form.problemmode'} eq &mt('Calculate answers')) {
867: &analyze($request,$file);
868: } else {
869: &renderpage($request,$file);
870: }
871: } else {
872: # requested file doesn't exist in contruction space
873: &newproblem($request);
874: }
875: } else {
876: # just render the page normally outside of construction space
877: &Apache::lonxml::debug("not construct");
878: &renderpage($request,$file);
879: }
880: #my $td=&tv_interval($t0);
881: #&Apache::lonxml::debug("Spent $td seconds processing");
882: # &Apache::lonhomework::send_footer($request);
883: # always turn off debug messages
884: $Apache::lonxml::debug=0;
885: return OK;
886:
887: }
888:
889: 1;
890: __END__
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