1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.163 2004/02/13 21:21:30 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::Constants qw(:common);
51: use HTML::Entities();
52: use Apache::loncommon();
53: use Apache::lonlocal;
54: #use Time::HiRes qw( gettimeofday tv_interval );
55:
56: BEGIN {
57: &Apache::lonxml::register_insert();
58: }
59:
60: sub get_target {
61: if (($ENV{'request.state'} eq "published") ||
62: ($ENV{'request.state'} eq "uploaded")) {
63: if ( defined($ENV{'form.grade_target'} )
64: && ($ENV{'form.grade_target'} eq 'tex')) {
65: return ($ENV{'form.grade_target'});
66: } elsif ( defined($ENV{'form.grade_target'} )
67: && ($Apache::lonhomework::viewgrades eq 'F' )) {
68: return ($ENV{'form.grade_target'});
69: }
70:
71: if ( defined($ENV{'form.submitted'}) &&
72: ( !defined($ENV{'form.resetdata'})) &&
73: ( !defined($ENV{'form.newrandomization'}))) {
74: return ('grade', 'web');
75: } else {
76: return ('web');
77: }
78: } elsif ($ENV{'request.state'} eq "construct") {
79: if ( defined($ENV{'form.grade_target'}) ) {
80: return ($ENV{'form.grade_target'});
81: }
82: if ( defined($ENV{'form.preview'})) {
83: if ( defined($ENV{'form.submitted'})) {
84: return ('grade', 'web');
85: } else {
86: return ('web');
87: }
88: } else {
89: if ( $ENV{'form.problemmode'} eq &mt('View') ||
90: $ENV{'form.problemmode'} eq &mt('Discard Edits and View')) {
91: if ( defined($ENV{'form.submitted'}) &&
92: (!defined($ENV{'form.resetdata'})) &&
93: (!defined($ENV{'form.newrandomization'}))) {
94: return ('grade', 'web','answer');
95: } else {
96: return ('web','answer');
97: }
98: } elsif ( $ENV{'form.problemmode'} eq &mt('Edit') ) {
99: if ( $ENV{'form.submitted'} eq 'edit' ) {
100: if ( $ENV{'form.submit'} eq &mt('Submit Changes and View') ) {
101: return ('modified','web','answer');
102: } else {
103: return ('modified','edit');
104: }
105: } else {
106: return ('edit');
107: }
108: } else {
109: return ('web');
110: }
111: }
112: }
113: return ();
114: }
115:
116: sub setup_vars {
117: my ($target) = @_;
118: return ';'
119: # return ';$external::target='.$target.';';
120: }
121:
122: sub send_header {
123: my ($request)= @_;
124: $request->print(&Apache::lontexconvert::header());
125: # $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
126: }
127:
128: sub createmenu {
129: my ($which,$request)=@_;
130: if ($which eq 'grade') {
131: $request->print('<script language="JavaScript">
132: hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
133: "height=350,width=150,menubar=no");
134: </script>');
135: }
136: }
137:
138: sub send_footer {
139: my ($request)= @_;
140: # $request->print('</form>');
141: $request->print(&Apache::lontexconvert::footer());
142: }
143:
144: $Apache::lonxml::browse='';
145:
146: sub check_ip_acc {
147: my ($acc)=@_;
148: if (!defined($acc) || $acc =~ /^\s*$/) { return 1; }
149: my $allowed=0;
150: my $ip=$ENV{'REMOTE_ADDR'};
151: my $name;
152: foreach my $pattern (split(',',$acc)) {
153: if ($pattern =~ /\*$/) {
154: #35.8.*
155: $pattern=~s/\*//;
156: if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
157: } elsif ($pattern =~ /(\d+\.\d+\.\d+)\.\[(\d+)-(\d+)\]$/) {
158: #35.8.3.[34-56]
159: my $low=$2;
160: my $high=$3;
161: $pattern=$1;
162: if ($ip =~ /^\Q$pattern\E/) {
163: my $last=(split(/\./,$ip))[3];
164: if ($last <=$high && $last >=$low) { $allowed=1; }
165: }
166: } elsif ($pattern =~ /^\*/) {
167: #*.msu.edu
168: $pattern=~s/\*//;
169: if (!defined($name)) {
170: use Socket;
171: my $netaddr=inet_aton($ip);
172: ($name)=gethostbyaddr($netaddr,AF_INET);
173: }
174: if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
175: } elsif ($pattern =~ /\d+\.\d+\.\d+\.\d+/) {
176: #127.0.0.1
177: if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
178: } else {
179: #some.name.com
180: if (!defined($name)) {
181: use Socket;
182: my $netaddr=inet_aton($ip);
183: ($name)=gethostbyaddr($netaddr,AF_INET);
184: }
185: if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
186: }
187: if ($allowed) { last; }
188: }
189: return $allowed;
190: }
191: # JB, 9/24/2002: Any changes in this function may require a change
192: # in lonnavmaps::resource::getDateStatus.
193: sub check_access {
194: my ($id) = @_;
195: my $date ='';
196: my $status;
197: my $datemsg = '';
198: my $lastdate = '';
199: my $temp;
200: my $type;
201: my $passed;
202:
203: if ($ENV{'request.state'} eq "construct") {
204: &Apache::lonxml::debug("in construction ignoring dates");
205: $status='CAN_ANSWER';
206: $datemsg=&mt('is in under construction');
207: # return ($status,$datemsg);
208: }
209:
210: &Apache::lonxml::debug("checking for part :$id:");
211: &Apache::lonxml::debug("time:".time);
212:
213: if ($ENV{'request.state'} ne "construct") {
214: my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
215: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
216: $status='INVALID_ACCESS';
217: $date=&mt("can not be accessed from your location.");
218: return($status,$date);
219: }
220:
221: foreach $temp ("opendate","duedate","answerdate") {
222: $lastdate = $date;
223: $date = &Apache::lonnet::EXT("resource.$id.$temp");
224: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
225: if ($thistype =~ /^(con_lost|no_such_host)/ ||
226: $date =~ /^(con_lost|no_such_host)/) {
227: $status='UNAVAILABLE';
228: $date=&mt("may open later.");
229: return($status,$date);
230: }
231: if ($thistype eq 'date_interval') {
232: if ($temp eq 'opendate') {
233: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
234: }
235: if ($temp eq 'answerdate') {
236: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
237: }
238: }
239: &Apache::lonxml::debug("found :$date: for :$temp:");
240: if ($date eq '') {
241: $date = &mt("an unknown date"); $passed = 0;
242: } elsif ($date eq 'con_lost') {
243: $date = &mt("an indeterminate date"); $passed = 0;
244: } else {
245: if (time < $date) { $passed = 0; } else { $passed = 1; }
246: $date = localtime $date;
247: }
248: if (!$passed) { $type=$temp; last; }
249: }
250: &Apache::lonxml::debug("have :$type:$passed:");
251: if ($passed) {
252: $status='SHOW_ANSWER';
253: $datemsg=$date;
254: } elsif ($type eq 'opendate') {
255: $status='CLOSED';
256: $datemsg = &mt("will open on")." $date";
257: } elsif ($type eq 'duedate') {
258: $status='CAN_ANSWER';
259: $datemsg = &mt("is due at")." $date";
260: } elsif ($type eq 'answerdate') {
261: $status='CLOSED';
262: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
263: }
264: }
265: if ($status eq 'CAN_ANSWER') {
266: #check #tries, and if correct.
267: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
268: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
269: if ( $tries eq '' ) { $tries = '0'; }
270: if ( $maxtries eq '' ) { $maxtries = '2'; }
271: if ($tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
272: # if (correct and show prob status) or excused then CANNOT_ANSWER
273: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
274: &&
275: lc($Apache::lonhomework::problemstatus) ne 'no')
276: ||
277: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
278: $status = 'CANNOT_ANSWER';
279: }
280: }
281:
282: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
283: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
284: # return ('UNCHECKEDOUT','needs to be checked out');
285: #}
286:
287:
288: &Apache::lonxml::debug("sending back :$status:$datemsg:");
289: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
290: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
291: $status='CAN_ANSWER';
292: $datemsg=&mt('is closed but you are allowed to view it');
293: }
294:
295: return ($status,$datemsg);
296: }
297:
298: sub showhash {
299: my (%hash) = @_;
300: &showhashsubset(\%hash,'.');
301: return '';
302: }
303:
304: sub showarray {
305: my ($array)=@_;
306: my $string="(";
307: foreach my $elm (@{ $array }) {
308: if (ref($elm)) {
309: if ($elm =~ /ARRAY/ ) {
310: $string.=&showarray($elm);
311: }
312: } else {
313: $string.="$elm,"
314: }
315: }
316: chop($string);
317: $string.=")";
318: return $string;
319: }
320:
321: sub showhashsubset {
322: my ($hash,$keyre) = @_;
323: my $resultkey;
324: foreach $resultkey (sort keys %$hash) {
325: if ($resultkey =~ /$keyre/) {
326: if (ref($$hash{$resultkey})) {
327: if ($$hash{$resultkey} =~ /ARRAY/ ) {
328: &Apache::lonxml::debug("$resultkey ---- ".
329: &showarray($$hash{$resultkey}));
330: } elsif ($$hash{$resultkey} =~ /HASH/ ) {
331: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
332: &showhashsubset($$hash{$resultkey},'.');
333: } else {
334: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
335: }
336: } else {
337: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
338: }
339: }
340: }
341: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
342: return '';
343: }
344:
345: sub setuppermissions {
346: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
347: my $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
348: if (! $viewgrades &&
349: exists($ENV{'request.course.sec'}) &&
350: $ENV{'request.course.sec'} !~ /^\s*$/) {
351: $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}.
352: '/'.$ENV{'request.course.sec'});
353: }
354: $Apache::lonhomework::viewgrades = $viewgrades;
355: return ''
356: }
357:
358: sub setupheader {
359: my $request=$_[0];
360: if ($ENV{'browser.mathml'}) {
361: &Apache::loncommon::content_type($request,'text/xml');
362: } else {
363: &Apache::loncommon::content_type($request,'text/html');
364: }
365: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
366: &Apache::loncommon::no_cache($request);
367: }
368: $request->send_http_header;
369: return OK if $request->header_only;
370: return ''
371: }
372:
373: sub handle_save_or_undo {
374: my ($request,$problem,$result) = @_;
375: my $file = &Apache::lonnet::filelocation("",$request->uri);
376: my $filebak =$file.".bak";
377: my $filetmp =$file.".tmp";
378: my $error=0;
379:
380: &Apache::lonnet::correct_line_ends($result);
381:
382: if ($ENV{'form.Undo'} eq &mt('undo')) {
383: my $error=0;
384: if (!copy($file,$filetmp)) { $error=1; }
385: if ((!$error) && (!copy($filebak,$file))) { $error=1; }
386: if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
387: if (!$error) {
388: $request->print("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");
389: } else {
390: $request->print("<p><font color=\"red\" size=\"+1\"><b>".&mt("Unable to undo, unable to switch")." $filebak ".&mt("and")." $file</b></font></p>");
391: $error=1;
392: }
393: } else {
394: my $fs=Apache::File->new(">$filebak");
395: if (defined($fs)) {
396: print $fs $$problem;
397: $request->print("<b>".&mt("Making Backup to").
398: " $filebak</b><br />");
399: } else {
400: $request->print("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");
401: $error=2;
402: }
403: my $fh=Apache::File->new(">$file");
404: if (defined($fh)) {
405: print $fh $$result;
406: $request->print("<b>".&mt("Saving Modifications to").
407: " $file</b><br />");
408: } else {
409: $request->print("<font color=\"red\" size=\"+1\"><b>".
410: &mt("Unable to write to")." $file</b></font>");
411: $error|=4;
412: }
413: }
414: return $error;
415: }
416:
417: sub analyze_header {
418: my ($request) = @_;
419: my $result.='<html>
420: <head><title>'.&mt("Analyzing a problem").'</title></head>
421: <body bgcolor="#FFFFFF">
422: <form name="lonhomework" method="POST" action="'.
423: $ENV{'request.uri'}.'">
424: <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
425: <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
426: <hr />
427: <input type="submit" name="submit" value="'.&mt("View").'" />
428: <hr />
429: '.&mt('List of possible answers').':
430: </form>';
431: $request->print($result);
432: $request->rflush();
433: }
434:
435: sub analyze_footer {
436: my ($request) = @_;
437: my $result='</body></html>';
438: $request->print($result);
439: $request->rflush();
440: }
441:
442: sub analyze {
443: my ($request,$file) = @_;
444: &Apache::lonxml::debug("Analyze");
445: my $result;
446: my %overall;
447: my %allparts;
448: my $rndseed=$ENV{'form.rndseed'};
449: &analyze_header($request);
450: my %prog_state=
451: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
452: &mt('Getting Problem Variants'),
453: $ENV{'form.numtoanalyze'});
454: for(my $i=1;$i<$ENV{'form.numtoanalyze'}+1;$i++) {
455: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
456: &mt('last problem'));
457: my $subresult=&Apache::lonnet::ssi($request->uri,
458: ('grade_target' => 'analyze'),
459: ('rndseed' => $i+$rndseed));
460: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
461: my %analyze=&Apache::lonnet::str2hash($subresult);
462: my @parts;
463: if (defined(@{ $analyze{'parts'} })) {
464: @parts=@{ $analyze{'parts'} };
465: }
466: foreach my $part (@parts) {
467: if (!exists($allparts{$part})) {$allparts{$part}=1;};
468: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
469: $analyze{$part.'.type'} eq 'stringresponse' ||
470: $analyze{$part.'.type'} eq 'formularesponse' ) {
471: push( @{ $overall{$part.'.answer'} },
472: [@{ $analyze{$part.'.answer'} }]);
473: }
474: }
475: }
476: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
477: &mt('Analyzing Results'));
478: foreach my $part (sort(keys(%allparts))) {
479: if (defined(@{ $overall{$part.'.answer'} })) {
480: my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
481: $request->print('<table><tr><td colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</td></tr>');
482: my %frequency;
483: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
484: $frequency{join("\0",@{ $answer })}++;
485: }
486: $request->print('<tr><td colspan="'.($num_cols).'">'.&mt('Answer').'</td><td>'.&mt('Frequency').'</td></tr>');
487: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
488: $request->print('<tr><td align="right">'.
489: join('</td><td align="right">',split("\0",$answer)).
490: '</td><td>('.$frequency{$answer}.
491: ')</td></tr>');
492: }
493: $request->print('</table>');
494: } else {
495: $request->print('<p>'.&mt('Response').' '.$part.' '.
496: &mt('is not analyzable at this time').'</p>');
497: }
498: }
499: if (scalar(keys(%allparts)) == 0 ) {
500: $request->print('<p>'.&mt('Found no analyzable respones in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
501: }
502: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
503: &analyze_footer($request);
504: &Apache::lonhomework::showhash(%overall);
505: return $result;
506: }
507:
508: sub editxmlmode {
509: my ($request,$file) = @_;
510: my $result;
511: my $problem=&Apache::lonnet::getfile($file);
512: if ($problem eq -1) {
513: &Apache::lonxml::error("<b> ".&mt('Unable to find').
514: " <i>$file</i></b>");
515: $problem='';
516: }
517: if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) {
518: my $error=&handle_save_or_undo($request,\$problem,
519: \$ENV{'form.editxmltext'});
520: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
521: }
522: &Apache::lonhomework::showhashsubset(\%ENV,'^form');
523: if ( $ENV{'form.submit'} eq &mt('Submit Changes and View') ) {
524: &Apache::lonhomework::showhashsubset(\%ENV,'^form');
525: $ENV{'form.problemmode'}='View';
526: &renderpage($request,$file);
527: } else {
528: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
529: my $xml_help = '<table><tr><td>'.
530: &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
531: "Problem Editing Help").
532: '</td><td>'.
533: &Apache::loncommon::help_open_faq(5).
534: &Apache::loncommon::help_open_bug('Authoring').'</td></tr></table>';
535: if ($cols > 80) { $cols = 80; }
536: if ($cols < 70) { $cols = 70; }
537: if ($rows < 20) { $rows = 20; }
538: $result.='<html><body bgcolor="#FFFFFF">
539: <form name="lonhomework" method="POST" action="'.
540: $ENV{'request.uri'}.'">
541: <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
542: <input type="submit" name="problemmode" value="'.&mt('Discard Edits and View').'" />
543: <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
544: <hr />
545: <input type="submit" name="submit" value="'.&mt('Submit Changes').'" />
546: <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />
547: <input type="submit" name="Undo" value="'.&mt('undo').'" />
548: <hr />
549: ' . $xml_help . '
550: <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
551: &HTML::Entities::encode($problem).'</textarea>
552: </form></body></html>';
553: $request->print($result);
554: }
555: return '';
556: }
557:
558: sub renderpage {
559: my ($request,$file) = @_;
560:
561: my (@targets) = &get_target();
562: &Apache::lonhomework::showhashsubset(\%ENV,'form.');
563: &Apache::lonxml::debug("Running targets ".join(':',@targets));
564: foreach my $target (@targets) {
565: #my $t0 = [&gettimeofday()];
566: my $problem=&Apache::lonnet::getfile($file);
567: if ($problem eq -1) {
568: &Apache::lonxml::error("<b> ".&mt('Unable to find')." <i>$file</i></b>");
569: $problem='';
570: }
571:
572: my %mystyle;
573: my $result = '';
574: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
575: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
576: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%ENV,'^form');}
577:
578: &Apache::lonxml::debug("Should be parsing now");
579: $result = &Apache::lonxml::xmlparse($request, $target, $problem,
580: &setup_vars($target),%mystyle);
581: undef($Apache::lonhomework::parsing_a_problem);
582: #$request->print("Result follows:");
583: if ($target eq 'modified') {
584: &handle_save_or_undo($request,\$problem,\$result);
585: } else {
586: if ($target eq 'analyze') {
587: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
588: undef(%Apache::lonhomework::analyze);
589: }
590: #my $td=&tv_interval($t0);
591: #if ( $Apache::lonxml::debug) {
592: #$result =~ s:</body>::;
593: #$result.="<br />Spent $td seconds processing target $target\n</body>";
594: #}
595: $request->print($result);
596: $request->rflush();
597: }
598: #$request->print(":Result ends");
599: #my $td=&tv_interval($t0);
600: }
601: }
602:
603: # with no arg it returns a HTML <option> list of the template titles
604: # with one arg it returns the filename associated with the arg passed
605: sub get_template_list {
606: my ($namewanted,$extension) = @_;
607: my $result;
608: my @allnames;
609: &Apache::lonxml::debug("Looking for :$extension:");
610: foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
611: my $name=&Apache::lonnet::metadata($file,'title');
612: if ($namewanted && ($name eq $namewanted)) {
613: $result=$file;
614: last;
615: } else {
616: if ($name) { push (@allnames, $name); }
617: }
618: }
619: if (@allnames && !$result) {
620: $result="<option>".&mt("Select a")." $extension ".&mt('template')."</option>\n<option>".
621: join('</option><option>',sort(@allnames)).'</option>';
622: }
623: return $result;
624: }
625:
626: sub newproblem {
627: my ($request) = @_;
628: my $extension=$request->uri;
629: $extension=~s:^.*\.([\w]+)$:$1:;
630: &Apache::lonxml::debug("Looking for :$extension:");
631: my $templatelist=&get_template_list('',$extension);
632: if ($ENV{'form.template'} &&
633: $ENV{'form.template'} ne "Select a $extension template") {
634: use File::Copy;
635: my $file = &get_template_list($ENV{'form.template'},$extension);
636: my $dest = &Apache::lonnet::filelocation("",$request->uri);
637: copy($file,$dest);
638: &renderpage($request,$dest);
639: } elsif($ENV{'form.newfile'} && !$templatelist) {
640: # I don't like hard-coded filenames but for now, this will work.
641: use File::Copy;
642: my $templatefilename =
643: $request->dir_config('lonIncludes').'/templates/blank.problem';
644: &Apache::lonxml::debug("$templatefilename");
645: my $dest = &Apache::lonnet::filelocation("",$request->uri);
646: copy($templatefilename,$dest);
647: &renderpage($request,$dest);
648: } else {
649: my $url=$request->uri;
650: my $shownurl=$url;
651: $shownurl=~s-^/~-/priv/-;
652: my $dest = &Apache::lonnet::filelocation("",$request->uri);
653: my $errormsg;
654: if ($ENV{'form.newfile'}) {
655: $errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";
656: }
657: my $instructions;
658: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
659: if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}
660: my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',
661: 'resource' => 'resource',
662: 'requested' => 'The requested file',
663: 'not exist' => 'currently does not exist',
664: 'createnew' => 'To create a new',
665: 'click' => 'click on the',
666: 'Create' => 'Create',
667: 'button' => 'button');
668: $request->print(<<ENDNEWPROBLEM);
669: $bodytag
670: <h1>$lt{'create'} $extension $lt{'resource'}</h1>
671: $errormsg
672: $lt{'requested'} <tt>$shownurl</tt> $lt{'not exist'}.
673: <p>
674: <b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>
675: </p>
676: <p><form action="$url" method="POST">
677: ENDNEWPROBLEM
678: if (defined($templatelist)) {
679: $request->print("<select name=\"template\">$templatelist</select>");
680: }
681: $request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");
682: $request->print("</form></p></body>");
683: }
684: return '';
685: }
686:
687: sub view_or_edit_menu {
688: my ($request) = @_;
689: my $url=$request->uri;
690: my %lt=&Apache::lonlocal::texthash( 'would' => 'Would you like to',
691: 'view' => 'View',
692: 'Edit' => 'edit',
693: 'or' => 'or',
694: 'the problem' => 'the problem');
695: $request->print(<<EDITMENU);
696: <body bgcolor="#FFFFFF">
697: <form action="$url" method="POST">
698: $lt{'would'} <input type="submit" name="problemmode" value="<{'view'}">
699: <{'or'} <input type="submit" name="problemmode" value="<{'Edit'}">
700: <{'the problem'}.
701: </form>
702: </body>
703: EDITMENU
704: }
705:
706: sub handler {
707: #my $t0 = [&gettimeofday()];
708: my $request=$_[0];
709:
710: $Apache::lonxml::debug=$ENV{'user.debug'};
711: if (&setupheader($request)) { return OK; }
712: $ENV{'request.uri'}=$request->uri;
713:
714: #setup permissions
715: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
716: $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
717: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
718: # some times multiple problemmodes are submitted, need to select
719: # the last one
720: &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
721: if ( defined($ENV{'form.problemmode'}) &&
722: ref($ENV{'form.problemmode'}) ) {
723: &Apache::lonxml::debug("Problem Mode ".join(",",@$ENV{'form.problemmode'}));
724: my $mode=$ENV{'form.problemmode'}->[-1];
725: undef $ENV{'form.problemmode'};
726: $ENV{'form.problemmode'}=$mode;
727: }
728: &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
729: my $file=&Apache::lonnet::filelocation("",$request->uri);
730:
731: #check if we know where we are
732: if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) {
733: # if we are browsing we might not be able to know where we are
734: if ($Apache::lonhomework::browse ne 'F') {
735: #should know where we are, so ask
736: if ( &Apache::lonnet::mod_perl_version() == 2 ) {
737: &Apache::lonnet::cleanenv();
738: }
739: $request->internal_redirect('/adm/ambiguous'); return;
740: }
741: }
742:
743: my ($symb) = &Apache::lonxml::whichuser();
744: &Apache::lonxml::debug('symb is '.$symb);
745: if ($ENV{'request.state'} eq "construct" || $symb eq '') {
746: if ($ENV{'form.resetdata'} eq &mt('Reset Submissions') ||
747: $ENV{'form.resetdata'} eq &mt('New Problem Variation') ||
748: $ENV{'form.newrandomization'} eq &mt('New Randomization')) {
749: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
750: &Apache::lonnet::tmpreset($symb,'',$domain,$name);
751: &Apache::lonxml::debug("Attempt reset");
752: }
753: }
754: if ($ENV{'request.state'} eq "construct") {
755: if ( -e $file ) {
756: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
757: ['problemmode']);
758: if (!(defined $ENV{'form.problemmode'})) {
759: #first visit to problem in construction space
760: #&view_or_edit_menu($request);
761: $ENV{'form.problemmode'}='View';
762: &renderpage($request,$file);
763: } elsif ($ENV{'form.problemmode'} eq &mt('EditXML')) {
764: &editxmlmode($request,$file);
765: } elsif ($ENV{'form.problemmode'} eq &mt('Calculate answers')) {
766: &analyze($request,$file);
767: } else {
768: &renderpage($request,$file);
769: }
770: } else {
771: # requested file doesn't exist in contruction space
772: &newproblem($request);
773: }
774: } else {
775: # just render the page normally outside of construction space
776: &Apache::lonxml::debug("not construct");
777: &renderpage($request,$file);
778: }
779: #my $td=&tv_interval($t0);
780: #&Apache::lonxml::debug("Spent $td seconds processing");
781: # &Apache::lonhomework::send_footer($request);
782: # always turn off debug messages
783: $Apache::lonxml::debug=0;
784: return OK;
785:
786: }
787:
788: 1;
789: __END__
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