1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.160 2004/01/15 03:44:01 www 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: my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
214: if (!$allowed) {
215: $status='INVALID_ACCESS';
216: $date=&mt("can not be accessed from your location.");
217: return($status,$date);
218: }
219:
220: foreach $temp ("opendate","duedate","answerdate") {
221: $lastdate = $date;
222: $date = &Apache::lonnet::EXT("resource.$id.$temp");
223: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
224: if ($thistype =~ /^(con_lost|no_such_host)/ ||
225: $date =~ /^(con_lost|no_such_host)/) {
226: $status='UNAVAILABLE';
227: $date=&mt("may open later.");
228: return($status,$date);
229: }
230: if ($thistype eq 'date_interval') {
231: if ($temp eq 'opendate') {
232: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
233: }
234: if ($temp eq 'answerdate') {
235: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
236: }
237: }
238: &Apache::lonxml::debug("found :$date: for :$temp:");
239: if ($date eq '') {
240: $date = &mt("an unknown date"); $passed = 0;
241: } elsif ($date eq 'con_lost') {
242: $date = &mt("an indeterminate date"); $passed = 0;
243: } else {
244: if (time < $date) { $passed = 0; } else { $passed = 1; }
245: $date = localtime $date;
246: }
247: if (!$passed) { $type=$temp; last; }
248: }
249: &Apache::lonxml::debug("have :$type:$passed:");
250: if ($passed) {
251: $status='SHOW_ANSWER';
252: $datemsg=$date;
253: } elsif ($type eq 'opendate') {
254: $status='CLOSED';
255: $datemsg = &mt("will open on")." $date";
256: } elsif ($type eq 'duedate') {
257: $status='CAN_ANSWER';
258: $datemsg = &mt("is due at")." $date";
259: } elsif ($type eq 'answerdate') {
260: $status='CLOSED';
261: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
262: }
263: if ($status eq 'CAN_ANSWER') {
264: #check #tries, and if correct.
265: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
266: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
267: if ( $tries eq '' ) { $tries = '0'; }
268: if ( $maxtries eq '' ) { $maxtries = '2'; }
269: if ($tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
270: # if (correct and show prob status) or excused then CANNOT_ANSWER
271: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
272: &&
273: lc($Apache::lonhomework::problemstatus) ne 'no')
274: ||
275: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
276: $status = 'CANNOT_ANSWER';
277: }
278: }
279:
280: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
281: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
282: # return ('UNCHECKEDOUT','needs to be checked out');
283: #}
284:
285:
286: &Apache::lonxml::debug("sending back :$status:$datemsg:");
287: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
288: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
289: $status='CAN_ANSWER';
290: $datemsg=&mt('is closed but you are allowed to view it');
291: }
292:
293: return ($status,$datemsg);
294: }
295:
296: sub showhash {
297: my (%hash) = @_;
298: &showhashsubset(\%hash,'.');
299: return '';
300: }
301:
302: sub showarray {
303: my ($array)=@_;
304: my $string="(";
305: foreach my $elm (@{ $array }) {
306: if (ref($elm)) {
307: if ($elm =~ /ARRAY/ ) {
308: $string.=&showarray($elm);
309: }
310: } else {
311: $string.="$elm,"
312: }
313: }
314: chop($string);
315: $string.=")";
316: return $string;
317: }
318:
319: sub showhashsubset {
320: my ($hash,$keyre) = @_;
321: my $resultkey;
322: foreach $resultkey (sort keys %$hash) {
323: if ($resultkey =~ /$keyre/) {
324: if (ref($$hash{$resultkey})) {
325: if ($$hash{$resultkey} =~ /ARRAY/ ) {
326: &Apache::lonxml::debug("$resultkey ---- ".
327: &showarray($$hash{$resultkey}));
328: } elsif ($$hash{$resultkey} =~ /HASH/ ) {
329: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
330: &showhashsubset($$hash{$resultkey},'.');
331: } else {
332: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
333: }
334: } else {
335: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
336: }
337: }
338: }
339: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
340: return '';
341: }
342:
343: sub setuppermissions {
344: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
345: my $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
346: if (! $viewgrades &&
347: exists($ENV{'request.course.sec'}) &&
348: $ENV{'request.course.sec'} !~ /^\s*$/) {
349: $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}.
350: '/'.$ENV{'request.course.sec'});
351: }
352: $Apache::lonhomework::viewgrades = $viewgrades;
353: return ''
354: }
355:
356: sub setupheader {
357: my $request=$_[0];
358: if ($ENV{'browser.mathml'}) {
359: &Apache::loncommon::content_type($request,'text/xml');
360: } else {
361: &Apache::loncommon::content_type($request,'text/html');
362: }
363: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
364: &Apache::loncommon::no_cache($request);
365: }
366: $request->send_http_header;
367: return OK if $request->header_only;
368: return ''
369: }
370:
371: sub handle_save_or_undo {
372: my ($request,$problem,$result) = @_;
373: my $file = &Apache::lonnet::filelocation("",$request->uri);
374: my $filebak =$file.".bak";
375: my $filetmp =$file.".tmp";
376: my $error=0;
377:
378: &Apache::lonnet::correct_line_ends($result);
379:
380: if ($ENV{'form.Undo'} eq &mt('undo')) {
381: my $error=0;
382: if (!copy($file,$filetmp)) { $error=1; }
383: if ((!$error) && (!copy($filebak,$file))) { $error=1; }
384: if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
385: if (!$error) {
386: $request->print("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");
387: } else {
388: $request->print("<p><font color=\"red\" size=\"+1\"><b>".&mt("Unable to undo, unable to switch")." $filebak ".&mt("and")." $file</b></font></p>");
389: $error=1;
390: }
391: } else {
392: my $fs=Apache::File->new(">$filebak");
393: if (defined($fs)) {
394: print $fs $$problem;
395: $request->print("<b>".&mt("Making Backup to").
396: " $filebak</b><br />");
397: } else {
398: $request->print("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");
399: $error=2;
400: }
401: my $fh=Apache::File->new(">$file");
402: if (defined($fh)) {
403: print $fh $$result;
404: $request->print("<b>".&mt("Saving Modifications to").
405: " $file</b><br />");
406: } else {
407: $request->print("<font color=\"red\" size=\"+1\"><b>".
408: &mt("Unable to write to")." $file</b></font>");
409: $error|=4;
410: }
411: }
412: return $error;
413: }
414:
415: sub analyze_header {
416: my ($request) = @_;
417: my $result.='<html>
418: <head><title>'.&mt("Analyzing a problem").'</title></head>
419: <body bgcolor="#FFFFFF">
420: <form name="lonhomework" method="POST" action="'.
421: $ENV{'request.uri'}.'">
422: <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
423: <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
424: <hr />
425: <input type="submit" name="submit" value="'.&mt("View").'" />
426: <hr />
427: '.&mt('List of possible answers').':
428: </form>';
429: $request->print($result);
430: $request->rflush();
431: }
432:
433: sub analyze_footer {
434: my ($request) = @_;
435: my $result='</body></html>';
436: $request->print($result);
437: $request->rflush();
438: }
439:
440: sub analyze {
441: my ($request,$file) = @_;
442: &Apache::lonxml::debug("Analyze");
443: my $result;
444: my %overall;
445: my %allparts;
446: my $rndseed=$ENV{'form.rndseed'};
447: &analyze_header($request);
448: my %prog_state=
449: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
450: &mt('Getting Problem Variants'),
451: $ENV{'form.numtoanalyze'});
452: for(my $i=1;$i<$ENV{'form.numtoanalyze'}+1;$i++) {
453: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
454: &mt('last problem'));
455: my $subresult=&Apache::lonnet::ssi($request->uri,
456: ('grade_target' => 'analyze'),
457: ('rndseed' => $i+$rndseed));
458: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
459: my %analyze=&Apache::lonnet::str2hash($subresult);
460: my @parts;
461: if (defined(@{ $analyze{'parts'} })) {
462: @parts=@{ $analyze{'parts'} };
463: }
464: foreach my $part (@parts) {
465: if (!exists($allparts{$part})) {$allparts{$part}=1;};
466: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
467: $analyze{$part.'.type'} eq 'stringresponse' ||
468: $analyze{$part.'.type'} eq 'formularesponse' ) {
469: push( @{ $overall{$part.'.answer'} },
470: [@{ $analyze{$part.'.answer'} }]);
471: }
472: }
473: }
474: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
475: &mt('Analyzing Results'));
476: foreach my $part (sort(keys(%allparts))) {
477: if (defined(@{ $overall{$part.'.answer'} })) {
478: my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
479: $request->print('<table><tr><td colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</td></tr>');
480: my %frequency;
481: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
482: $frequency{join("\0",@{ $answer })}++;
483: }
484: $request->print('<tr><td colspan="'.($num_cols).'">'.&mt('Answer').'</td><td>'.&mt('Frequency').'</td></tr>');
485: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
486: $request->print('<tr><td align="right">'.
487: join('</td><td align="right">',split("\0",$answer)).
488: '</td><td>('.$frequency{$answer}.
489: ')</td></tr>');
490: }
491: $request->print('</table>');
492: } else {
493: $request->print('<p>'.&mt('Part').' '.$part.' '.
494: &mt('is not analyzable at this time').'</p>');
495: }
496: }
497: if (scalar(keys(%allparts)) == 0 ) {
498: $request->print('<p>'.&mt('Found no analyzable parts in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
499: }
500: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
501: &analyze_footer($request);
502: &Apache::lonhomework::showhash(%overall);
503: return $result;
504: }
505:
506: sub editxmlmode {
507: my ($request,$file) = @_;
508: my $result;
509: my $problem=&Apache::lonnet::getfile($file);
510: if ($problem eq -1) {
511: &Apache::lonxml::error("<b> ".&mt('Unable to find').
512: " <i>$file</i></b>");
513: $problem='';
514: }
515: if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) {
516: my $error=&handle_save_or_undo($request,\$problem,
517: \$ENV{'form.editxmltext'});
518: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
519: }
520: &Apache::lonhomework::showhashsubset(\%ENV,'^form');
521: if ( $ENV{'form.submit'} eq &mt('Submit Changes and View') ) {
522: &Apache::lonhomework::showhashsubset(\%ENV,'^form');
523: $ENV{'form.problemmode'}='View';
524: &renderpage($request,$file);
525: } else {
526: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
527: my $xml_help = '<table><tr><td>'.
528: &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
529: "Problem Editing Help").
530: '</td><td>'.
531: &Apache::loncommon::help_open_faq(5).
532: &Apache::loncommon::help_open_bug('Authoring').'</td></tr></table>';
533: if ($cols > 80) { $cols = 80; }
534: if ($cols < 70) { $cols = 70; }
535: if ($rows < 20) { $rows = 20; }
536: $result.='<html><body bgcolor="#FFFFFF">
537: <form name="lonhomework" method="POST" action="'.
538: $ENV{'request.uri'}.'">
539: <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
540: <input type="submit" name="problemmode" value="'.&mt('Discard Edits and View').'" />
541: <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
542: <hr />
543: <input type="submit" name="submit" value="'.&mt('Submit Changes').'" />
544: <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />
545: <input type="submit" name="Undo" value="'.&mt('undo').'" />
546: <hr />
547: ' . $xml_help . '
548: <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
549: &HTML::Entities::encode($problem).'</textarea>
550: </form></body></html>';
551: $request->print($result);
552: }
553: return '';
554: }
555:
556: sub renderpage {
557: my ($request,$file) = @_;
558:
559: my (@targets) = &get_target();
560: &Apache::lonxml::debug("Running targets ".join(':',@targets));
561: foreach my $target (@targets) {
562: #my $t0 = [&gettimeofday()];
563: my $problem=&Apache::lonnet::getfile($file);
564: if ($problem eq -1) {
565: &Apache::lonxml::error("<b> ".&mt('Unable to find')." <i>$file</i></b>");
566: $problem='';
567: }
568:
569: my %mystyle;
570: my $result = '';
571: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
572: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
573: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%ENV,'^form');}
574:
575: &Apache::lonxml::debug("Should be parsing now");
576: $result = &Apache::lonxml::xmlparse($request, $target, $problem,
577: &setup_vars($target),%mystyle);
578: undef($Apache::lonhomework::parsing_a_problem);
579: #$request->print("Result follows:");
580: if ($target eq 'modified') {
581: &handle_save_or_undo($request,\$problem,\$result);
582: } else {
583: if ($target eq 'analyze') {
584: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
585: undef(%Apache::lonhomework::analyze);
586: }
587: #my $td=&tv_interval($t0);
588: #if ( $Apache::lonxml::debug) {
589: #$result =~ s:</body>::;
590: #$result.="<br />Spent $td seconds processing target $target\n</body>";
591: #}
592: $request->print($result);
593: $request->rflush();
594: }
595: #$request->print(":Result ends");
596: #my $td=&tv_interval($t0);
597: }
598: }
599:
600: # with no arg it returns a HTML <option> list of the template titles
601: # with one arg it returns the filename associated with the arg passed
602: sub get_template_list {
603: my ($namewanted,$extension) = @_;
604: my $result;
605: my @allnames;
606: &Apache::lonxml::debug("Looking for :$extension:");
607: foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
608: my $name=&Apache::lonnet::metadata($file,'title');
609: if ($namewanted && ($name eq $namewanted)) {
610: $result=$file;
611: last;
612: } else {
613: if ($name) { push (@allnames, $name); }
614: }
615: }
616: if (@allnames && !$result) {
617: $result="<option>".&mt("Select a")." $extension ".&mt('template')."</option>\n<option>".
618: join('</option><option>',sort(@allnames)).'</option>';
619: }
620: return $result;
621: }
622:
623: sub newproblem {
624: my ($request) = @_;
625: my $extension=$request->uri;
626: $extension=~s:^.*\.([\w]+)$:$1:;
627: &Apache::lonxml::debug("Looking for :$extension:");
628: my $templatelist=&get_template_list('',$extension);
629: if ($ENV{'form.template'} &&
630: $ENV{'form.template'} ne "Select a $extension template") {
631: use File::Copy;
632: my $file = &get_template_list($ENV{'form.template'},$extension);
633: my $dest = &Apache::lonnet::filelocation("",$request->uri);
634: copy($file,$dest);
635: &renderpage($request,$dest);
636: } elsif($ENV{'form.newfile'} && !$templatelist) {
637: # I don't like hard-coded filenames but for now, this will work.
638: use File::Copy;
639: my $templatefilename =
640: $request->dir_config('lonIncludes').'/templates/blank.problem';
641: &Apache::lonxml::debug("$templatefilename");
642: my $dest = &Apache::lonnet::filelocation("",$request->uri);
643: copy($templatefilename,$dest);
644: &renderpage($request,$dest);
645: } else {
646: my $url=$request->uri;
647: my $shownurl=$url;
648: $shownurl=~s-^/~-/priv/-;
649: my $dest = &Apache::lonnet::filelocation("",$request->uri);
650: my $errormsg;
651: if ($ENV{'form.newfile'}) {
652: $errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";
653: }
654: my $instructions;
655: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
656: if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}
657: my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',
658: 'resource' => 'resource',
659: 'requested' => 'The requested file',
660: 'not exist' => 'currently does not exist',
661: 'createnew' => 'To create a new',
662: 'click' => 'click on the',
663: 'Create' => 'Create',
664: 'button' => 'button');
665: $request->print(<<ENDNEWPROBLEM);
666: $bodytag
667: <h1>$lt{'create'} $extension $lt{'resource'}</h1>
668: $errormsg
669: $lt{'requested'} <tt>$shownurl</tt> $lt{'not exist'}.
670: <p>
671: <b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>
672: </p>
673: <p><form action="$url" method="POST">
674: ENDNEWPROBLEM
675: if (defined($templatelist)) {
676: $request->print("<select name=\"template\">$templatelist</select>");
677: }
678: $request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");
679: $request->print("</form></p></body>");
680: }
681: return '';
682: }
683:
684: sub view_or_edit_menu {
685: my ($request) = @_;
686: my $url=$request->uri;
687: my %lt=&Apache::lonlocal::texthash( 'would' => 'Would you like to',
688: 'view' => 'View',
689: 'Edit' => 'edit',
690: 'or' => 'or',
691: 'the problem' => 'the problem');
692: $request->print(<<EDITMENU);
693: <body bgcolor="#FFFFFF">
694: <form action="$url" method="POST">
695: $lt{'would'} <input type="submit" name="problemmode" value="<{'view'}">
696: <{'or'} <input type="submit" name="problemmode" value="<{'Edit'}">
697: <{'the problem'}.
698: </form>
699: </body>
700: EDITMENU
701: }
702:
703: sub handler {
704: #my $t0 = [&gettimeofday()];
705: my $request=$_[0];
706:
707: $Apache::lonxml::debug=$ENV{'user.debug'};
708:
709: if (&setupheader($request)) { return OK; }
710: $ENV{'request.uri'}=$request->uri;
711:
712: #setup permissions
713: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
714: $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
715: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
716: # some times multiple problemmodes are submitted, need to select
717: # the last one
718: &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
719: if ( defined($ENV{'form.problemmode'}) &&
720: ref($ENV{'form.problemmode'}) ) {
721: &Apache::lonxml::debug("Problem Mode ".join(",",@$ENV{'form.problemmode'}));
722: my $mode=$ENV{'form.problemmode'}->[-1];
723: undef $ENV{'form.problemmode'};
724: $ENV{'form.problemmode'}=$mode;
725: }
726: &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
727: my $file=&Apache::lonnet::filelocation("",$request->uri);
728:
729: #check if we know where we are
730: if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) {
731: # if we are browsing we might not be able to know where we are
732: if ($Apache::lonhomework::browse ne 'F') {
733: #should know where we are, so ask
734: if ( &Apache::lonnet::mod_perl_version() == 2 ) {
735: &Apache::lonnet::cleanenv();
736: }
737: $request->internal_redirect('/adm/ambiguous'); return;
738: }
739: }
740:
741: my ($symb) = &Apache::lonxml::whichuser();
742: &Apache::lonxml::debug('symb is '.$symb);
743: if ($ENV{'request.state'} eq "construct" || $symb eq '') {
744: if ($ENV{'form.resetdata'} eq &mt('Reset Submissions') ||
745: $ENV{'form.resetdata'} eq &mt('New Problem Variation') ||
746: $ENV{'form.newrandomization'} eq &mt('New Randomization')) {
747: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
748: &Apache::lonnet::tmpreset($symb,'',$domain,$name);
749: &Apache::lonxml::debug("Attempt reset");
750: }
751: }
752: if ($ENV{'request.state'} eq "construct") {
753: if ( -e $file ) {
754: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
755: ['problemmode']);
756: if (!(defined $ENV{'form.problemmode'})) {
757: #first visit to problem in construction space
758: #&view_or_edit_menu($request);
759: $ENV{'form.problemmode'}='View';
760: &renderpage($request,$file);
761: } elsif ($ENV{'form.problemmode'} eq &mt('EditXML')) {
762: &editxmlmode($request,$file);
763: } elsif ($ENV{'form.problemmode'} eq &mt('Calculate answers')) {
764: &analyze($request,$file);
765: } else {
766: &renderpage($request,$file);
767: }
768: } else {
769: # requested file doesn't exist in contruction space
770: &newproblem($request);
771: }
772: } else {
773: # just render the page normally outside of construction space
774: &Apache::lonxml::debug("not construct");
775: &renderpage($request,$file);
776: }
777: #my $td=&tv_interval($t0);
778: #&Apache::lonxml::debug("Spent $td seconds processing");
779: # &Apache::lonhomework::send_footer($request);
780: # always turn off debug messages
781: $Apache::lonxml::debug=0;
782: return OK;
783:
784: }
785:
786: 1;
787: __END__
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