1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.167 2004/02/16 19:19:31 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: if ($ENV{'form.problemstate'}) {
205: if ($ENV{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
206: if ( ! ($ENV{'form.problemstate'} eq 'CANNOT_ANSWER_correct' &&
207: lc($Apache::lonhomework::problemstatus) eq 'no')) {
208: return ('CANNOT_ANSWER','is in this state by royal decree.');
209: }
210: } else {
211: return ($ENV{'form.problemstate'},
212: 'is in this state by royal decree.');
213: }
214: }
215: &Apache::lonxml::debug("in construction ignoring dates");
216: $status='CAN_ANSWER';
217: $datemsg=&mt('is in under construction');
218: # return ($status,$datemsg);
219: }
220:
221: &Apache::lonxml::debug("checking for part :$id:");
222: &Apache::lonxml::debug("time:".time);
223:
224: if ($ENV{'request.state'} ne "construct") {
225: my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
226: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
227: $status='INVALID_ACCESS';
228: $date=&mt("can not be accessed from your location.");
229: return($status,$date);
230: }
231:
232: foreach $temp ("opendate","duedate","answerdate") {
233: $lastdate = $date;
234: $date = &Apache::lonnet::EXT("resource.$id.$temp");
235: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
236: if ($thistype =~ /^(con_lost|no_such_host)/ ||
237: $date =~ /^(con_lost|no_such_host)/) {
238: $status='UNAVAILABLE';
239: $date=&mt("may open later.");
240: return($status,$date);
241: }
242: if ($thistype eq 'date_interval') {
243: if ($temp eq 'opendate') {
244: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
245: }
246: if ($temp eq 'answerdate') {
247: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
248: }
249: }
250: &Apache::lonxml::debug("found :$date: for :$temp:");
251: if ($date eq '') {
252: $date = &mt("an unknown date"); $passed = 0;
253: } elsif ($date eq 'con_lost') {
254: $date = &mt("an indeterminate date"); $passed = 0;
255: } else {
256: if (time < $date) { $passed = 0; } else { $passed = 1; }
257: $date = localtime $date;
258: }
259: if (!$passed) { $type=$temp; last; }
260: }
261: &Apache::lonxml::debug("have :$type:$passed:");
262: if ($passed) {
263: $status='SHOW_ANSWER';
264: $datemsg=$date;
265: } elsif ($type eq 'opendate') {
266: $status='CLOSED';
267: $datemsg = &mt("will open on")." $date";
268: } elsif ($type eq 'duedate') {
269: $status='CAN_ANSWER';
270: $datemsg = &mt("is due at")." $date";
271: } elsif ($type eq 'answerdate') {
272: $status='CLOSED';
273: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
274: }
275: }
276: if ($status eq 'CAN_ANSWER') {
277: #check #tries, and if correct.
278: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
279: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
280: if ( $tries eq '' ) { $tries = '0'; }
281: if ( $maxtries eq '' &&
282: $ENV{'request.state'} ne 'construct') { $maxtries = '2'; }
283: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
284: # if (correct and show prob status) or excused then CANNOT_ANSWER
285: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
286: &&
287: lc($Apache::lonhomework::problemstatus) ne 'no')
288: ||
289: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
290: $status = 'CANNOT_ANSWER';
291: }
292: }
293:
294: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
295: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
296: # return ('UNCHECKEDOUT','needs to be checked out');
297: #}
298:
299:
300: &Apache::lonxml::debug("sending back :$status:$datemsg:");
301: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
302: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
303: $status='CAN_ANSWER';
304: $datemsg=&mt('is closed but you are allowed to view it');
305: }
306:
307: return ($status,$datemsg);
308: }
309:
310: sub showhash {
311: my (%hash) = @_;
312: &showhashsubset(\%hash,'.');
313: return '';
314: }
315:
316: sub showarray {
317: my ($array)=@_;
318: my $string="(";
319: foreach my $elm (@{ $array }) {
320: if (ref($elm)) {
321: if ($elm =~ /ARRAY/ ) {
322: $string.=&showarray($elm);
323: }
324: } else {
325: $string.="$elm,"
326: }
327: }
328: chop($string);
329: $string.=")";
330: return $string;
331: }
332:
333: sub showhashsubset {
334: my ($hash,$keyre) = @_;
335: my $resultkey;
336: foreach $resultkey (sort keys %$hash) {
337: if ($resultkey =~ /$keyre/) {
338: if (ref($$hash{$resultkey})) {
339: if ($$hash{$resultkey} =~ /ARRAY/ ) {
340: &Apache::lonxml::debug("$resultkey ---- ".
341: &showarray($$hash{$resultkey}));
342: } elsif ($$hash{$resultkey} =~ /HASH/ ) {
343: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
344: &showhashsubset($$hash{$resultkey},'.');
345: } else {
346: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
347: }
348: } else {
349: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
350: }
351: }
352: }
353: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
354: return '';
355: }
356:
357: sub setuppermissions {
358: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
359: my $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
360: if (! $viewgrades &&
361: exists($ENV{'request.course.sec'}) &&
362: $ENV{'request.course.sec'} !~ /^\s*$/) {
363: $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}.
364: '/'.$ENV{'request.course.sec'});
365: }
366: $Apache::lonhomework::viewgrades = $viewgrades;
367: return ''
368: }
369:
370: sub setupheader {
371: my $request=$_[0];
372: if ($ENV{'browser.mathml'}) {
373: &Apache::loncommon::content_type($request,'text/xml');
374: } else {
375: &Apache::loncommon::content_type($request,'text/html');
376: }
377: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
378: &Apache::loncommon::no_cache($request);
379: }
380: $request->send_http_header;
381: return OK if $request->header_only;
382: return ''
383: }
384:
385: sub handle_save_or_undo {
386: my ($request,$problem,$result) = @_;
387: my $file = &Apache::lonnet::filelocation("",$request->uri);
388: my $filebak =$file.".bak";
389: my $filetmp =$file.".tmp";
390: my $error=0;
391:
392: &Apache::lonnet::correct_line_ends($result);
393:
394: if ($ENV{'form.Undo'} eq &mt('undo')) {
395: my $error=0;
396: if (!copy($file,$filetmp)) { $error=1; }
397: if ((!$error) && (!copy($filebak,$file))) { $error=1; }
398: if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
399: if (!$error) {
400: $request->print("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");
401: } else {
402: $request->print("<p><font color=\"red\" size=\"+1\"><b>".&mt("Unable to undo, unable to switch")." $filebak ".&mt("and")." $file</b></font></p>");
403: $error=1;
404: }
405: } else {
406: my $fs=Apache::File->new(">$filebak");
407: if (defined($fs)) {
408: print $fs $$problem;
409: $request->print("<b>".&mt("Making Backup to").
410: " $filebak</b><br />");
411: } else {
412: $request->print("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");
413: $error=2;
414: }
415: my $fh=Apache::File->new(">$file");
416: if (defined($fh)) {
417: print $fh $$result;
418: $request->print("<b>".&mt("Saving Modifications to").
419: " $file</b><br />");
420: } else {
421: $request->print("<font color=\"red\" size=\"+1\"><b>".
422: &mt("Unable to write to")." $file</b></font>");
423: $error|=4;
424: }
425: }
426: return $error;
427: }
428:
429: sub analyze_header {
430: my ($request) = @_;
431: my $result.='<html>
432: <head><title>'.&mt("Analyzing a problem").'</title></head>
433: <body bgcolor="#FFFFFF">
434: <form name="lonhomework" method="POST" action="'.
435: $ENV{'request.uri'}.'">
436: <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
437: <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
438: <hr />
439: <input type="submit" name="submit" value="'.&mt("View").'" />
440: <hr />
441: '.&mt('List of possible answers').':
442: </form>';
443: $request->print($result);
444: $request->rflush();
445: }
446:
447: sub analyze_footer {
448: my ($request) = @_;
449: my $result='</body></html>';
450: $request->print($result);
451: $request->rflush();
452: }
453:
454: sub analyze {
455: my ($request,$file) = @_;
456: &Apache::lonxml::debug("Analyze");
457: my $result;
458: my %overall;
459: my %allparts;
460: my $rndseed=$ENV{'form.rndseed'};
461: &analyze_header($request);
462: my %prog_state=
463: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
464: &mt('Getting Problem Variants'),
465: $ENV{'form.numtoanalyze'});
466: for(my $i=1;$i<$ENV{'form.numtoanalyze'}+1;$i++) {
467: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
468: &mt('last problem'));
469: my $subresult=&Apache::lonnet::ssi($request->uri,
470: ('grade_target' => 'analyze'),
471: ('rndseed' => $i+$rndseed));
472: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
473: my %analyze=&Apache::lonnet::str2hash($subresult);
474: my @parts;
475: if (defined(@{ $analyze{'parts'} })) {
476: @parts=@{ $analyze{'parts'} };
477: }
478: foreach my $part (@parts) {
479: if (!exists($allparts{$part})) {$allparts{$part}=1;};
480: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
481: $analyze{$part.'.type'} eq 'stringresponse' ||
482: $analyze{$part.'.type'} eq 'formularesponse' ) {
483: push( @{ $overall{$part.'.answer'} },
484: [@{ $analyze{$part.'.answer'} }]);
485: }
486: }
487: }
488: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
489: &mt('Analyzing Results'));
490: foreach my $part (sort(keys(%allparts))) {
491: if (defined(@{ $overall{$part.'.answer'} })) {
492: my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
493: $request->print('<table><tr><td colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</td></tr>');
494: my %frequency;
495: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
496: $frequency{join("\0",@{ $answer })}++;
497: }
498: $request->print('<tr><td colspan="'.($num_cols).'">'.&mt('Answer').'</td><td>'.&mt('Frequency').'</td></tr>');
499: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
500: $request->print('<tr><td align="right">'.
501: join('</td><td align="right">',split("\0",$answer)).
502: '</td><td>('.$frequency{$answer}.
503: ')</td></tr>');
504: }
505: $request->print('</table>');
506: } else {
507: $request->print('<p>'.&mt('Response').' '.$part.' '.
508: &mt('is not analyzable at this time').'</p>');
509: }
510: }
511: if (scalar(keys(%allparts)) == 0 ) {
512: $request->print('<p>'.&mt('Found no analyzable respones in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
513: }
514: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
515: &analyze_footer($request);
516: &Apache::lonhomework::showhash(%overall);
517: return $result;
518: }
519:
520: sub editxmlmode {
521: my ($request,$file) = @_;
522: my $result;
523: my $problem=&Apache::lonnet::getfile($file);
524: if ($problem eq -1) {
525: &Apache::lonxml::error("<b> ".&mt('Unable to find').
526: " <i>$file</i></b>");
527: $problem='';
528: }
529: if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) {
530: my $error=&handle_save_or_undo($request,\$problem,
531: \$ENV{'form.editxmltext'});
532: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
533: }
534: &Apache::lonhomework::showhashsubset(\%ENV,'^form');
535: if ( $ENV{'form.submit'} eq &mt('Submit Changes and View') ) {
536: &Apache::lonhomework::showhashsubset(\%ENV,'^form');
537: $ENV{'form.problemmode'}='View';
538: &renderpage($request,$file);
539: } else {
540: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
541: my $xml_help = '<table><tr><td>'.
542: &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
543: "Problem Editing Help").
544: '</td><td>'.
545: &Apache::loncommon::help_open_faq(5).
546: &Apache::loncommon::help_open_bug('Authoring').'</td></tr></table>';
547: if ($cols > 80) { $cols = 80; }
548: if ($cols < 70) { $cols = 70; }
549: if ($rows < 20) { $rows = 20; }
550: $result.='<html><body bgcolor="#FFFFFF">
551: <form name="lonhomework" method="POST" action="'.
552: $ENV{'request.uri'}.'">
553: <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
554: <input type="submit" name="problemmode" value="'.&mt('Discard Edits and View').'" />
555: <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
556: <hr />
557: <input type="submit" name="submit" value="'.&mt('Submit Changes').'" />
558: <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />
559: <input type="submit" name="Undo" value="'.&mt('undo').'" />
560: <hr />
561: ' . $xml_help . '
562: <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
563: &HTML::Entities::encode($problem).'</textarea>
564: </form></body></html>';
565: $request->print($result);
566: }
567: return '';
568: }
569:
570: sub renderpage {
571: my ($request,$file) = @_;
572:
573: my (@targets) = &get_target();
574: &Apache::lonhomework::showhashsubset(\%ENV,'form.');
575: &Apache::lonxml::debug("Running targets ".join(':',@targets));
576: foreach my $target (@targets) {
577: #my $t0 = [&gettimeofday()];
578: my $problem=&Apache::lonnet::getfile($file);
579: if ($problem eq -1) {
580: &Apache::lonxml::error("<b> ".&mt('Unable to find')." <i>$file</i></b>");
581: $problem='';
582: }
583:
584: my %mystyle;
585: my $result = '';
586: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
587: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
588: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%ENV,'^form');}
589:
590: &Apache::lonxml::debug("Should be parsing now");
591: $result = &Apache::lonxml::xmlparse($request, $target, $problem,
592: &setup_vars($target),%mystyle);
593: undef($Apache::lonhomework::parsing_a_problem);
594: #$request->print("Result follows:");
595: if ($target eq 'modified') {
596: &handle_save_or_undo($request,\$problem,\$result);
597: } else {
598: if ($target eq 'analyze') {
599: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
600: undef(%Apache::lonhomework::analyze);
601: }
602: #my $td=&tv_interval($t0);
603: #if ( $Apache::lonxml::debug) {
604: #$result =~ s:</body>::;
605: #$result.="<br />Spent $td seconds processing target $target\n</body>";
606: #}
607: $request->print($result);
608: $request->rflush();
609: }
610: #$request->print(":Result ends");
611: #my $td=&tv_interval($t0);
612: }
613: }
614:
615: # with no arg it returns a HTML <option> list of the template titles
616: # with one arg it returns the filename associated with the arg passed
617: sub get_template_list {
618: my ($namewanted,$extension) = @_;
619: my $result;
620: my @allnames;
621: &Apache::lonxml::debug("Looking for :$extension:");
622: foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
623: my $name=&Apache::lonnet::metadata($file,'title');
624: if ($namewanted && ($name eq $namewanted)) {
625: $result=$file;
626: last;
627: } else {
628: if ($name) { push (@allnames, $name); }
629: }
630: }
631: if (@allnames && !$result) {
632: $result="<option>".&mt("Select a")." $extension ".&mt('template')."</option>\n<option>".
633: join('</option><option>',sort(@allnames)).'</option>';
634: }
635: return $result;
636: }
637:
638: sub newproblem {
639: my ($request) = @_;
640: my $extension=$request->uri;
641: $extension=~s:^.*\.([\w]+)$:$1:;
642: &Apache::lonxml::debug("Looking for :$extension:");
643: my $templatelist=&get_template_list('',$extension);
644: if ($ENV{'form.template'} &&
645: $ENV{'form.template'} ne "Select a $extension template") {
646: use File::Copy;
647: my $file = &get_template_list($ENV{'form.template'},$extension);
648: my $dest = &Apache::lonnet::filelocation("",$request->uri);
649: copy($file,$dest);
650: &renderpage($request,$dest);
651: } elsif($ENV{'form.newfile'} && !$templatelist) {
652: # I don't like hard-coded filenames but for now, this will work.
653: use File::Copy;
654: my $templatefilename =
655: $request->dir_config('lonIncludes').'/templates/blank.problem';
656: &Apache::lonxml::debug("$templatefilename");
657: my $dest = &Apache::lonnet::filelocation("",$request->uri);
658: copy($templatefilename,$dest);
659: &renderpage($request,$dest);
660: } else {
661: my $url=$request->uri;
662: my $shownurl=$url;
663: $shownurl=~s-^/~-/priv/-;
664: my $dest = &Apache::lonnet::filelocation("",$request->uri);
665: my $errormsg;
666: if ($ENV{'form.newfile'}) {
667: $errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";
668: }
669: my $instructions;
670: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
671: if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}
672: my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',
673: 'resource' => 'resource',
674: 'requested' => 'The requested file',
675: 'not exist' => 'currently does not exist',
676: 'createnew' => 'To create a new',
677: 'click' => 'click on the',
678: 'Create' => 'Create',
679: 'button' => 'button');
680: $request->print(<<ENDNEWPROBLEM);
681: $bodytag
682: <h1>$lt{'create'} $extension $lt{'resource'}</h1>
683: $errormsg
684: $lt{'requested'} <tt>$shownurl</tt> $lt{'not exist'}.
685: <p>
686: <b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>
687: </p>
688: <p><form action="$url" method="POST">
689: ENDNEWPROBLEM
690: if (defined($templatelist)) {
691: $request->print("<select name=\"template\">$templatelist</select>");
692: }
693: $request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");
694: $request->print("</form></p></body>");
695: }
696: return '';
697: }
698:
699: sub view_or_edit_menu {
700: my ($request) = @_;
701: my $url=$request->uri;
702: my %lt=&Apache::lonlocal::texthash( 'would' => 'Would you like to',
703: 'view' => 'View',
704: 'Edit' => 'edit',
705: 'or' => 'or',
706: 'the problem' => 'the problem');
707: $request->print(<<EDITMENU);
708: <body bgcolor="#FFFFFF">
709: <form action="$url" method="POST">
710: $lt{'would'} <input type="submit" name="problemmode" value="<{'view'}">
711: <{'or'} <input type="submit" name="problemmode" value="<{'Edit'}">
712: <{'the problem'}.
713: </form>
714: </body>
715: EDITMENU
716: }
717:
718: sub handler {
719: #my $t0 = [&gettimeofday()];
720: my $request=$_[0];
721:
722: $Apache::lonxml::debug=$ENV{'user.debug'};
723: if (&setupheader($request)) { return OK; }
724: $ENV{'request.uri'}=$request->uri;
725:
726: #setup permissions
727: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
728: $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
729: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
730: # some times multiple problemmodes are submitted, need to select
731: # the last one
732: &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
733: if ( defined($ENV{'form.problemmode'}) &&
734: ref($ENV{'form.problemmode'}) ) {
735: &Apache::lonxml::debug("Problem Mode ".join(",",@$ENV{'form.problemmode'}));
736: my $mode=$ENV{'form.problemmode'}->[-1];
737: undef $ENV{'form.problemmode'};
738: $ENV{'form.problemmode'}=$mode;
739: }
740: &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
741: my $file=&Apache::lonnet::filelocation("",$request->uri);
742:
743: #check if we know where we are
744: if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) {
745: # if we are browsing we might not be able to know where we are
746: if ($Apache::lonhomework::browse ne 'F') {
747: #should know where we are, so ask
748: if ( &Apache::lonnet::mod_perl_version() == 2 ) {
749: &Apache::lonnet::cleanenv();
750: }
751: $request->internal_redirect('/adm/ambiguous'); return;
752: }
753: }
754:
755: my ($symb) = &Apache::lonxml::whichuser();
756: &Apache::lonxml::debug('symb is '.$symb);
757: if ($ENV{'request.state'} eq "construct" || $symb eq '') {
758: if ($ENV{'form.resetdata'} eq &mt('Reset Submissions') ||
759: $ENV{'form.resetdata'} eq &mt('New Problem Variation') ||
760: $ENV{'form.newrandomization'} eq &mt('New Randomization')) {
761: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
762: &Apache::lonnet::tmpreset($symb,'',$domain,$name);
763: &Apache::lonxml::debug("Attempt reset");
764: }
765: }
766: if ($ENV{'request.state'} eq "construct") {
767: if ( -e $file ) {
768: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
769: ['problemmode']);
770: if (!(defined $ENV{'form.problemmode'})) {
771: #first visit to problem in construction space
772: #&view_or_edit_menu($request);
773: $ENV{'form.problemmode'}='View';
774: &renderpage($request,$file);
775: } elsif ($ENV{'form.problemmode'} eq &mt('EditXML')) {
776: &editxmlmode($request,$file);
777: } elsif ($ENV{'form.problemmode'} eq &mt('Calculate answers')) {
778: &analyze($request,$file);
779: } else {
780: &renderpage($request,$file);
781: }
782: } else {
783: # requested file doesn't exist in contruction space
784: &newproblem($request);
785: }
786: } else {
787: # just render the page normally outside of construction space
788: &Apache::lonxml::debug("not construct");
789: &renderpage($request,$file);
790: }
791: #my $td=&tv_interval($t0);
792: #&Apache::lonxml::debug("Spent $td seconds processing");
793: # &Apache::lonhomework::send_footer($request);
794: # always turn off debug messages
795: $Apache::lonxml::debug=0;
796: return OK;
797:
798: }
799:
800: 1;
801: __END__
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