1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.150 2003/09/19 20:29:29 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: # Guy Albertelli
29: # 11/30 Gerd Kortemeyer
30: # 6/1,8/17,8/18 Gerd Kortemeyer
31: # 7/18 Jeremy Bowers
32:
33: package Apache::lonhomework;
34: use strict;
35: use Apache::style();
36: use Apache::lonxml();
37: use Apache::lonnet();
38: use Apache::lonplot();
39: use Apache::inputtags();
40: use Apache::structuretags();
41: use Apache::randomlabel();
42: use Apache::response();
43: use Apache::hint();
44: use Apache::outputtags();
45: use Apache::caparesponse();
46: use Apache::radiobuttonresponse();
47: use Apache::optionresponse();
48: use Apache::imageresponse();
49: use Apache::essayresponse();
50: use Apache::externalresponse();
51: use Apache::rankresponse();
52: use Apache::matchresponse();
53: use Apache::chemresponse();
54: use Apache::Constants qw(:common);
55: use HTML::Entities();
56: use Apache::loncommon();
57: use Apache::lonlocal;
58: #use Time::HiRes qw( gettimeofday tv_interval );
59:
60: BEGIN {
61: &Apache::lonxml::register_insert();
62: }
63:
64: sub get_target {
65: if (($ENV{'request.state'} eq "published") ||
66: ($ENV{'request.state'} eq "uploaded")) {
67: if ( defined($ENV{'form.grade_target'} )
68: && ($ENV{'form.grade_target'} eq 'tex')) {
69: return ($ENV{'form.grade_target'});
70: } elsif ( defined($ENV{'form.grade_target'} )
71: && ($Apache::lonhomework::viewgrades eq 'F' )) {
72: return ($ENV{'form.grade_target'});
73: }
74:
75: if ( defined($ENV{'form.submitted'}) &&
76: ( !defined($ENV{'form.resetdata'})) &&
77: ( !defined($ENV{'form.newrandomization'}))) {
78: return ('grade', 'web');
79: } else {
80: return ('web');
81: }
82: } elsif ($ENV{'request.state'} eq "construct") {
83: if ( defined($ENV{'form.grade_target'}) ) {
84: return ($ENV{'form.grade_target'});
85: }
86: if ( defined($ENV{'form.preview'})) {
87: if ( defined($ENV{'form.submitted'})) {
88: return ('grade', 'web');
89: } else {
90: return ('web');
91: }
92: } else {
93: if ( $ENV{'form.problemmode'} eq &mt('View') ||
94: $ENV{'form.problemmode'} eq &mt('Discard Edits and View')) {
95: if ( defined($ENV{'form.submitted'}) &&
96: (!defined($ENV{'form.resetdata'})) &&
97: (!defined($ENV{'form.newrandomization'}))) {
98: return ('grade', 'web','answer');
99: } else {
100: return ('web','answer');
101: }
102: } elsif ( $ENV{'form.problemmode'} eq &mt('Edit') ) {
103: if ( $ENV{'form.submitted'} eq 'edit' ) {
104: if ( $ENV{'form.submit'} eq &mt('Submit Changes and View') ) {
105: return ('modified','web','answer');
106: } else {
107: return ('modified','edit');
108: }
109: } else {
110: return ('edit');
111: }
112: } else {
113: return ('web');
114: }
115: }
116: }
117: return ();
118: }
119:
120: sub setup_vars {
121: my ($target) = @_;
122: return ';'
123: # return ';$external::target='.$target.';';
124: }
125:
126: sub send_header {
127: my ($request)= @_;
128: $request->print(&Apache::lontexconvert::header());
129: # $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
130: }
131:
132: sub createmenu {
133: my ($which,$request)=@_;
134: if ($which eq 'grade') {
135: $request->print('<script language="JavaScript">
136: hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
137: "height=350,width=150,menubar=no");
138: </script>');
139: }
140: }
141:
142: sub send_footer {
143: my ($request)= @_;
144: # $request->print('</form>');
145: $request->print(&Apache::lontexconvert::footer());
146: }
147:
148: $Apache::lonxml::browse='';
149:
150: # JB, 9/24/2002: Any changes in this function may require a change
151: # in lonnavmaps::resource::getDateStatus.
152: sub check_access {
153: my ($id) = @_;
154: my $date ='';
155: my $status;
156: my $datemsg = '';
157: my $lastdate = '';
158: my $temp;
159: my $type;
160: my $passed;
161:
162: if ($ENV{'request.state'} eq "construct") {
163: &Apache::lonxml::debug("in construction ignoring dates");
164: $status='CAN_ANSWER';
165: $datemsg=&mt('is in under construction');
166: return ($status,$datemsg);
167: }
168:
169: &Apache::lonxml::debug("checking for part :$id:");
170: &Apache::lonxml::debug("time:".time);
171: foreach $temp ("opendate","duedate","answerdate") {
172: $lastdate = $date;
173: $date = &Apache::lonnet::EXT("resource.$id.$temp");
174: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
175: if ($thistype =~ /^(con_lost|no_such_host)/ ||
176: $date =~ /^(con_lost|no_such_host)/) {
177: $status='UNAVAILABLE';
178: $date=&mt("may open later.");
179: return($status,$date);
180: }
181: if ($thistype eq 'date_interval') {
182: if ($temp eq 'opendate') {
183: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
184: }
185: if ($temp eq 'answerdate') {
186: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
187: }
188: }
189: &Apache::lonxml::debug("found :$date: for :$temp:");
190: if ($date eq '') {
191: $date = &mt("an unknown date"); $passed = 0;
192: } elsif ($date eq 'con_lost') {
193: $date = &mt("an indeterminate date"); $passed = 0;
194: } else {
195: if (time < $date) { $passed = 0; } else { $passed = 1; }
196: $date = localtime $date;
197: }
198: if (!$passed) { $type=$temp; last; }
199: }
200: &Apache::lonxml::debug("have :$type:$passed:");
201: if ($passed) {
202: $status='SHOW_ANSWER';
203: $datemsg=$date;
204: } elsif ($type eq 'opendate') {
205: $status='CLOSED';
206: $datemsg = &mt("will open on")." $date";
207: } elsif ($type eq 'duedate') {
208: $status='CAN_ANSWER';
209: $datemsg = &mt("is due at")." $date";
210: } elsif ($type eq 'answerdate') {
211: $status='CLOSED';
212: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
213: }
214: if ($status eq 'CAN_ANSWER') {
215: #check #tries, and if correct.
216: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
217: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
218: if ( $tries eq '' ) { $tries = '0'; }
219: if ( $maxtries eq '' ) { $maxtries = '2'; }
220: if ($tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
221: # if (correct and show prob status) or excused then CANNOT_ANSWER
222: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
223: &&
224: lc($Apache::lonhomework::problemstatus) ne 'no')
225: ||
226: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
227: $status = 'CANNOT_ANSWER';
228: }
229: }
230:
231: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
232: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
233: # return ('UNCHECKEDOUT','needs to be checked out');
234: #}
235:
236:
237: &Apache::lonxml::debug("sending back :$status:$datemsg:");
238: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
239: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
240: $status='CAN_ANSWER';
241: $datemsg=&mt('is closed but you are allowed to view it');
242: }
243:
244: return ($status,$datemsg);
245: }
246:
247: sub showhash {
248: my (%hash) = @_;
249: &showhashsubset(\%hash,'.');
250: return '';
251: }
252:
253: sub showarray {
254: my ($array)=@_;
255: my $string="(";
256: foreach my $elm (@{ $array }) {
257: if (ref($elm)) {
258: if ($elm =~ /ARRAY/ ) {
259: $string.=&showarray($elm);
260: }
261: } else {
262: $string.="$elm,"
263: }
264: }
265: chop($string);
266: $string.=")";
267: return $string;
268: }
269:
270: sub showhashsubset {
271: my ($hash,$keyre) = @_;
272: my $resultkey;
273: foreach $resultkey (sort keys %$hash) {
274: if ($resultkey =~ /$keyre/) {
275: if (ref($$hash{$resultkey})) {
276: if ($$hash{$resultkey} =~ /ARRAY/ ) {
277: &Apache::lonxml::debug("$resultkey ---- ".
278: &showarray($$hash{$resultkey}));
279: } elsif ($$hash{$resultkey} =~ /HASH/ ) {
280: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
281: &showhashsubset($$hash{$resultkey},'.');
282: } else {
283: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
284: }
285: } else {
286: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
287: }
288: }
289: }
290: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
291: return '';
292: }
293:
294: sub setuppermissions {
295: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
296: my $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
297: if (! $viewgrades &&
298: exists($ENV{'request.course.sec'}) &&
299: $ENV{'request.course.sec'} !~ /^\s*$/) {
300: $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}.
301: '/'.$ENV{'request.course.sec'});
302: }
303: $Apache::lonhomework::viewgrades = $viewgrades;
304: return ''
305: }
306:
307: sub setupheader {
308: my $request=$_[0];
309: if ($ENV{'browser.mathml'}) {
310: $request->content_type('text/xml');
311: } else {
312: $request->content_type('text/html');
313: }
314: $request->content_encoding('UTF-8');
315: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
316: &Apache::loncommon::no_cache($request);
317: }
318: $request->send_http_header;
319: return OK if $request->header_only;
320: return ''
321: }
322:
323: sub handle_save_or_undo {
324: my ($request,$problem,$result) = @_;
325: my $file = &Apache::lonnet::filelocation("",$request->uri);
326: my $filebak =$file.".bak";
327: my $filetmp =$file.".tmp";
328: my $error=0;
329:
330: if ($ENV{'form.Undo'} eq &mt('undo')) {
331: my $error=0;
332: if (!copy($file,$filetmp)) { $error=1; }
333: if ((!$error) && (!copy($filebak,$file))) { $error=1; }
334: if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
335: if (!$error) {
336: $request->print("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");
337: } else {
338: $request->print("<p><font color=\"red\" size=\"+1\"><b>".&mt("Unable to undo, unable to switch")." $filebak ".&mt("and")." $file</b></font></p>");
339: $error=1;
340: }
341: } else {
342: my $fs=Apache::File->new(">$filebak");
343: if (defined($fs)) {
344: print $fs $$problem;
345: $request->print("<b>".&mt("Making Backup to").
346: " $filebak</b><br />");
347: } else {
348: $request->print("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");
349: $error=2;
350: }
351: my $fh=Apache::File->new(">$file");
352: if (defined($fh)) {
353: print $fh $$result;
354: $request->print("<b>".&mt("Saving Modifications to").
355: " $file</b><br />");
356: } else {
357: $request->print("<font color=\"red\" size=\"+1\"><b>".
358: &mt("Unable to write to")." $file</b></font>");
359: $error|=4;
360: }
361: }
362: return $error;
363: }
364:
365: sub analyze_header {
366: my ($request) = @_;
367: my $result.='<html>
368: <head><title>'.&mt("Analyzing a problem").'</title></head>
369: <body bgcolor="#FFFFFF">
370: <form name="lonhomework" method="POST" action="'.
371: $ENV{'request.uri'}.'">
372: <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
373: <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
374: <hr />
375: <input type="submit" name="submit" value="'.&mt("View").'" />
376: <hr />
377: '.&mt('List of possible answers').':
378: </form>';
379: $request->print($result);
380: $request->rflush();
381: }
382:
383: sub analyze_footer {
384: my ($request) = @_;
385: my $result='</body></html>';
386: $request->print($result);
387: $request->rflush();
388: }
389:
390: sub analyze {
391: my ($request,$file) = @_;
392: &Apache::lonxml::debug("Analyze");
393: my $result;
394: my %overall;
395: my %allparts;
396: my $rndseed=$ENV{'form.rndseed'};
397: &analyze_header($request);
398: my %prog_state=
399: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
400: &mt('Getting Problem Variants'),
401: $ENV{'form.numtoanalyze'});
402: for(my $i=1;$i<$ENV{'form.numtoanalyze'}+1;$i++) {
403: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
404: &mt('last problem'));
405: my $subresult=&Apache::lonnet::ssi($request->uri,
406: ('grade_target' => 'analyze'),
407: ('rndseed' => $i+$rndseed));
408: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
409: my %analyze=&Apache::lonnet::str2hash($subresult);
410: my @parts;
411: if (defined(@{ $analyze{'parts'} })) {
412: @parts=@{ $analyze{'parts'} };
413: }
414: foreach my $part (@parts) {
415: if (!exists($allparts{$part})) {$allparts{$part}=1;};
416: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
417: $analyze{$part.'.type'} eq 'stringresponse' ||
418: $analyze{$part.'.type'} eq 'formularesponse' ) {
419: push( @{ $overall{$part.'.answer'} },
420: [@{ $analyze{$part.'.answer'} }]);
421: }
422: }
423: }
424: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
425: &mt('Analyzing Results'));
426: foreach my $part (sort(keys(%allparts))) {
427: if (defined(@{ $overall{$part.'.answer'} })) {
428: my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
429: $request->print('<table><tr><td colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</td></tr>');
430: my %frequency;
431: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
432: $frequency{join("\0",@{ $answer })}++;
433: }
434: $request->print('<tr><td colspan="'.($num_cols).'">'.&mt('Answer').'</td><td>'.&mt('Frequency').'</td></tr>');
435: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
436: $request->print('<tr><td align="right">'.
437: join('</td><td align="right">',split("\0",$answer)).
438: '</td><td>('.$frequency{$answer}.
439: ')</td></tr>');
440: }
441: $request->print('</table>');
442: } else {
443: $request->print('<p>'.&mt('Part').' '.$part.' '.
444: &mt('is not analyzable at this time').'</p>');
445: }
446: }
447: if (scalar(keys(%allparts)) == 0 ) {
448: $request->print('<p>'.&mt('Found no analyzable parts in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
449: }
450: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
451: &analyze_footer($request);
452: &Apache::lonhomework::showhash(%overall);
453: return $result;
454: }
455:
456: sub editxmlmode {
457: my ($request,$file) = @_;
458: my $result;
459: my $problem=&Apache::lonnet::getfile($file);
460: if ($problem eq -1) {
461: &Apache::lonxml::error("<b> ".&mt('Unable to find').
462: " <i>$file</i></b>");
463: $problem='';
464: }
465: if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) {
466: my $error=&handle_save_or_undo($request,\$problem,
467: \$ENV{'form.editxmltext'});
468: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
469: }
470: &Apache::lonhomework::showhashsubset(\%ENV,'^form');
471: if ( $ENV{'form.submit'} eq &mt('Submit Changes and View') ) {
472: &Apache::lonhomework::showhashsubset(\%ENV,'^form');
473: $ENV{'form.problemmode'}='View';
474: &renderpage($request,$file);
475: } else {
476: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
477: my $xml_help = Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
478: "Problem Editing Help");
479: if ($cols > 80) { $cols = 80; }
480: if ($cols < 70) { $cols = 70; }
481: if ($rows < 20) { $rows = 20; }
482: $result.='<html><body bgcolor="#FFFFFF">
483: <form name="lonhomework" method="POST" action="'.
484: $ENV{'request.uri'}.'">
485: <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
486: <input type="submit" name="problemmode" value="'.&mt('Discard Edits and View').'" />
487: <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
488: <hr />
489: <input type="submit" name="submit" value="'.&mt('Submit Changes').'" />
490: <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />
491: <input type="submit" name="Undo" value="'.&mt('undo').'" />
492: <hr />
493: ' . $xml_help . '
494: <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
495: &HTML::Entities::encode($problem).'</textarea>
496: </form></body></html>';
497: $request->print($result);
498: }
499: return '';
500: }
501:
502: sub renderpage {
503: my ($request,$file) = @_;
504:
505: my (@targets) = &get_target();
506: &Apache::lonxml::debug("Running targets ".join(':',@targets));
507: foreach my $target (@targets) {
508: #my $t0 = [&gettimeofday()];
509: my $problem=&Apache::lonnet::getfile($file);
510: if ($problem eq -1) {
511: &Apache::lonxml::error("<b> ".&mt('Unable to find')." <i>$file</i></b>");
512: $problem='';
513: }
514:
515: my %mystyle;
516: my $result = '';
517: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
518: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
519: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%ENV,'^form');}
520:
521: &Apache::lonxml::debug("Should be parsing now");
522: $result = &Apache::lonxml::xmlparse($request, $target, $problem,
523: &setup_vars($target),%mystyle);
524: undef($Apache::lonhomework::parsing_a_problem);
525: #$request->print("Result follows:");
526: if ($target eq 'modified') {
527: &handle_save_or_undo($request,\$problem,\$result);
528: } else {
529: if ($target eq 'analyze') {
530: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
531: undef(%Apache::lonhomework::analyze);
532: }
533: #my $td=&tv_interval($t0);
534: #if ( $Apache::lonxml::debug) {
535: #$result =~ s:</body>::;
536: #$result.="<br />Spent $td seconds processing target $target\n</body>";
537: #}
538: $request->print($result);
539: $request->rflush();
540: }
541: #$request->print(":Result ends");
542: #my $td=&tv_interval($t0);
543: }
544: }
545:
546: # with no arg it returns a HTML <option> list of the template titles
547: # with one arg it returns the filename associated with the arg passed
548: sub get_template_list {
549: my ($namewanted,$extension) = @_;
550: my $result;
551: my @allnames;
552: &Apache::lonxml::debug("Looking for :$extension:");
553: foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
554: my $name=&Apache::lonnet::metadata($file,'title');
555: if ($namewanted && ($name eq $namewanted)) {
556: $result=$file;
557: last;
558: } else {
559: if ($name) { push (@allnames, $name); }
560: }
561: }
562: if (@allnames && !$result) {
563: $result="<option>".&mt("Select a")." $extension ".&mt('template')."</option>\n<option>".
564: join('</option><option>',sort(@allnames)).'</option>';
565: }
566: return $result;
567: }
568:
569: sub newproblem {
570: my ($request) = @_;
571: my $extension=$request->uri;
572: $extension=~s:^.*\.([\w]+)$:$1:;
573: &Apache::lonxml::debug("Looking for :$extension:");
574: my $templatelist=&get_template_list('',$extension);
575: if ($ENV{'form.template'} &&
576: $ENV{'form.template'} ne "Select a $extension template") {
577: use File::Copy;
578: my $file = &get_template_list($ENV{'form.template'},$extension);
579: my $dest = &Apache::lonnet::filelocation("",$request->uri);
580: copy($file,$dest);
581: &renderpage($request,$dest);
582: } elsif($ENV{'form.newfile'} && !$templatelist) {
583: # I don't like hard-coded filenames but for now, this will work.
584: use File::Copy;
585: my $templatefilename =
586: $request->dir_config('lonIncludes').'/templates/blank.problem';
587: &Apache::lonxml::debug("$templatefilename");
588: my $dest = &Apache::lonnet::filelocation("",$request->uri);
589: copy($templatefilename,$dest);
590: &renderpage($request,$dest);
591: } else {
592: my $url=$request->uri;
593: my $dest = &Apache::lonnet::filelocation("",$request->uri);
594: my $errormsg;
595: if ($ENV{'form.newfile'}) {
596: $errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";
597: }
598: my $instructions;
599: if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}
600: my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',
601: 'resource' => 'resource',
602: 'requested' => 'The requested file',
603: 'not exist' => 'currently does not exist',
604: 'createnew' => 'To create a new',
605: 'click' => 'click on the',
606: 'Create' => 'Create',
607: 'button' => 'button');
608: $request->print(<<ENDNEWPROBLEM);
609: <body bgcolor="#FFFFFF">
610: <h1>$lt{'create'} $extension $lt{'resource'}</h1>
611: $errormsg
612: $lt{'requested'} <tt>$url</tt> $lt{'not exist'}.
613: <p>
614: <b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>
615: </p>
616: <p><form action="$url" method="POST">
617: ENDNEWPROBLEM
618: if (defined($templatelist)) {
619: $request->print("<select name=\"template\">$templatelist</select>");
620: }
621: $request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");
622: $request->print("</form></p></body>");
623: }
624: return '';
625: }
626:
627: sub view_or_edit_menu {
628: my ($request) = @_;
629: my $url=$request->uri;
630: my %lt=&Apache::lonlocal::texthash( 'would' => 'Would you like to',
631: 'view' => 'View',
632: 'Edit' => 'edit',
633: 'or' => 'or',
634: 'the problem' => 'the problem');
635: $request->print(<<EDITMENU);
636: <body bgcolor="#FFFFFF">
637: <form action="$url" method="POST">
638: $lt{'would'} <input type="submit" name="problemmode" value="<{'view'}">
639: <{'or'} <input type="submit" name="problemmode" value="<{'Edit'}">
640: <{'the problem'}.
641: </form>
642: </body>
643: EDITMENU
644: }
645:
646: sub handler {
647: #my $t0 = [&gettimeofday()];
648: my $request=$_[0];
649:
650: $Apache::lonxml::debug=$ENV{'user.debug'};
651:
652: if (&setupheader($request)) { return OK; }
653: $ENV{'request.uri'}=$request->uri;
654:
655: #setup permissions
656: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
657: $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
658: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
659: # some times multiple problemmodes are submitted, need to select
660: # the last one
661: &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
662: if ( defined($ENV{'form.problemmode'}) &&
663: ref($ENV{'form.problemmode'}) ) {
664: &Apache::lonxml::debug("Problem Mode ".join(",",@$ENV{'form.problemmode'}));
665: my $mode=$ENV{'form.problemmode'}->[-1];
666: undef $ENV{'form.problemmode'};
667: $ENV{'form.problemmode'}=$mode;
668: }
669: &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
670: my $file=&Apache::lonnet::filelocation("",$request->uri);
671:
672: #check if we know where we are
673: if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) {
674: # if we are browsing we might not be able to know where we are
675: if ($Apache::lonhomework::browse ne 'F') {
676: #should know where we are, so ask
677: if ( &Apache::lonnet::mod_perl_version() == 2 ) {
678: &Apache::lonnet::cleanenv();
679: }
680: $request->internal_redirect('/adm/ambiguous'); return;
681: }
682: }
683:
684: my ($symb) = &Apache::lonxml::whichuser();
685: &Apache::lonxml::debug('symb is '.$symb);
686: if ($ENV{'request.state'} eq "construct" || $symb eq '') {
687: if ($ENV{'form.resetdata'} eq &mt('Reset Submissions') ||
688: $ENV{'form.resetdata'} eq &mt('New Problem Variation') ||
689: $ENV{'form.newrandomization'} eq &mt('New Randomization')) {
690: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
691: &Apache::lonnet::tmpreset($symb,'',$domain,$name);
692: &Apache::lonxml::debug("Attempt reset");
693: }
694: }
695: if ($ENV{'request.state'} eq "construct") {
696: if ( -e $file ) {
697: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
698: ['problemmode']);
699: if (!(defined $ENV{'form.problemmode'})) {
700: #first visit to problem in construction space
701: #&view_or_edit_menu($request);
702: $ENV{'form.problemmode'}='View';
703: &renderpage($request,$file);
704: } elsif ($ENV{'form.problemmode'} eq &mt('EditXML')) {
705: &editxmlmode($request,$file);
706: } elsif ($ENV{'form.problemmode'} eq &mt('Calculate answers')) {
707: &analyze($request,$file);
708: } else {
709: &renderpage($request,$file);
710: }
711: } else {
712: # requested file doesn't exist in contruction space
713: &newproblem($request);
714: }
715: } else {
716: # just render the page normally outside of construction space
717: &Apache::lonxml::debug("not construct");
718: &renderpage($request,$file);
719: }
720: #my $td=&tv_interval($t0);
721: #&Apache::lonxml::debug("Spent $td seconds processing");
722: # &Apache::lonhomework::send_footer($request);
723: # always turn off debug messages
724: $Apache::lonxml::debug=0;
725: return OK;
726:
727: }
728:
729: 1;
730: __END__
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