1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.183 2004/11/13 20:40:32 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27:
28:
29: package Apache::lonhomework;
30: use strict;
31: use Apache::style();
32: use Apache::lonxml();
33: use Apache::lonnet();
34: use Apache::lonplot();
35: use Apache::inputtags();
36: use Apache::structuretags();
37: use Apache::randomlabel();
38: use Apache::response();
39: use Apache::hint();
40: use Apache::outputtags();
41: use Apache::caparesponse();
42: use Apache::radiobuttonresponse();
43: use Apache::optionresponse();
44: use Apache::imageresponse();
45: use Apache::essayresponse();
46: use Apache::externalresponse();
47: use Apache::rankresponse();
48: use Apache::matchresponse();
49: use Apache::chemresponse();
50: use Apache::drawimage();
51: use Apache::Constants qw(:common);
52: use HTML::Entities();
53: use Apache::loncommon();
54: use Apache::lonlocal;
55: use Time::HiRes qw( gettimeofday tv_interval );
56:
57: BEGIN {
58: &Apache::lonxml::register_insert();
59: }
60:
61: sub get_target {
62: if (($ENV{'request.state'} eq "published") ||
63: ($ENV{'request.state'} eq "uploaded")) {
64: if ( defined($ENV{'form.grade_target'} )
65: && ($ENV{'form.grade_target'} eq 'tex')) {
66: return ($ENV{'form.grade_target'});
67: } elsif ( defined($ENV{'form.grade_target'} )
68: && ($Apache::lonhomework::viewgrades eq 'F' )) {
69: return ($ENV{'form.grade_target'});
70: }
71:
72: if ( defined($ENV{'form.submitted'}) &&
73: ( !defined($ENV{'form.resetdata'})) &&
74: ( !defined($ENV{'form.newrandomization'}))) {
75: return ('grade', 'web');
76: } else {
77: return ('web');
78: }
79: } elsif ($ENV{'request.state'} eq "construct") {
80: if ( defined($ENV{'form.grade_target'}) ) {
81: return ($ENV{'form.grade_target'});
82: }
83: if ( defined($ENV{'form.preview'})) {
84: if ( defined($ENV{'form.submitted'})) {
85: return ('grade', 'web');
86: } else {
87: return ('web');
88: }
89: } else {
90: if ( $ENV{'form.problemmode'} eq &mt('View') ||
91: $ENV{'form.problemmode'} eq &mt('Discard Edits and View')) {
92: if ( defined($ENV{'form.submitted'}) &&
93: (!defined($ENV{'form.resetdata'})) &&
94: (!defined($ENV{'form.newrandomization'}))) {
95: return ('grade', 'web','answer');
96: } else {
97: return ('web','answer');
98: }
99: } elsif ( $ENV{'form.problemmode'} eq &mt('Edit') ) {
100: if ( $ENV{'form.submitted'} eq 'edit' ) {
101: if ( $ENV{'form.submit'} eq &mt('Submit Changes and View') ) {
102: return ('modified','web','answer');
103: } else {
104: return ('modified','edit');
105: }
106: } else {
107: return ('edit');
108: }
109: } else {
110: return ('web');
111: }
112: }
113: }
114: return ();
115: }
116:
117: sub setup_vars {
118: my ($target) = @_;
119: return ';'
120: # return ';$external::target='.$target.';';
121: }
122:
123: sub send_header {
124: my ($request)= @_;
125: $request->print(&Apache::lontexconvert::header());
126: # $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
127: }
128:
129: sub createmenu {
130: my ($which,$request)=@_;
131: if ($which eq 'grade') {
132: $request->print('<script language="JavaScript">
133: hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
134: "height=350,width=150,menubar=no");
135: </script>');
136: }
137: }
138:
139: sub send_footer {
140: my ($request)= @_;
141: # $request->print('</form>');
142: $request->print(&Apache::lontexconvert::footer());
143: }
144:
145: $Apache::lonxml::browse='';
146:
147: sub check_ip_acc {
148: my ($acc)=@_;
149: if (!defined($acc) || $acc =~ /^\s*$/) { return 1; }
150: my $allowed=0;
151: my $ip=$ENV{'REMOTE_ADDR'};
152: my $name;
153: foreach my $pattern (split(',',$acc)) {
154: if ($pattern =~ /\*$/) {
155: #35.8.*
156: $pattern=~s/\*//;
157: if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
158: } elsif ($pattern =~ /(\d+\.\d+\.\d+)\.\[(\d+)-(\d+)\]$/) {
159: #35.8.3.[34-56]
160: my $low=$2;
161: my $high=$3;
162: $pattern=$1;
163: if ($ip =~ /^\Q$pattern\E/) {
164: my $last=(split(/\./,$ip))[3];
165: if ($last <=$high && $last >=$low) { $allowed=1; }
166: }
167: } elsif ($pattern =~ /^\*/) {
168: #*.msu.edu
169: $pattern=~s/\*//;
170: if (!defined($name)) {
171: use Socket;
172: my $netaddr=inet_aton($ip);
173: ($name)=gethostbyaddr($netaddr,AF_INET);
174: }
175: if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
176: } elsif ($pattern =~ /\d+\.\d+\.\d+\.\d+/) {
177: #127.0.0.1
178: if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
179: } else {
180: #some.name.com
181: if (!defined($name)) {
182: use Socket;
183: my $netaddr=inet_aton($ip);
184: ($name)=gethostbyaddr($netaddr,AF_INET);
185: }
186: if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
187: }
188: if ($allowed) { last; }
189: }
190: return $allowed;
191: }
192: # JB, 9/24/2002: Any changes in this function may require a change
193: # in lonnavmaps::resource::getDateStatus.
194: sub check_access {
195: my ($id) = @_;
196: my $date ='';
197: my $status;
198: my $datemsg = '';
199: my $lastdate = '';
200: my $temp;
201: my $type;
202: my $passed;
203:
204: if ($ENV{'request.state'} eq "construct") {
205: if ($ENV{'form.problemstate'}) {
206: if ($ENV{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
207: if ( ! ($ENV{'form.problemstate'} eq 'CANNOT_ANSWER_correct' &&
208: lc($Apache::lonhomework::problemstatus) eq 'no')) {
209: return ('CANNOT_ANSWER',
210: &mt('is in this state due to author settings.'));
211: }
212: } else {
213: return ($ENV{'form.problemstate'},
214: &mt('is in this state due to author settings.'));
215: }
216: }
217: &Apache::lonxml::debug("in construction ignoring dates");
218: $status='CAN_ANSWER';
219: $datemsg=&mt('is in under construction');
220: # return ($status,$datemsg);
221: }
222:
223: &Apache::lonxml::debug("checking for part :$id:");
224: &Apache::lonxml::debug("time:".time);
225:
226: if ($ENV{'request.state'} ne "construct") {
227: my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
228: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
229: $status='INVALID_ACCESS';
230: $date=&mt("can not be accessed from your location.");
231: return($status,$date);
232: }
233:
234: foreach $temp ("opendate","duedate","answerdate") {
235: $lastdate = $date;
236: $date = &Apache::lonnet::EXT("resource.$id.$temp");
237: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
238: if ($thistype =~ /^(con_lost|no_such_host)/ ||
239: $date =~ /^(con_lost|no_such_host)/) {
240: $status='UNAVAILABLE';
241: $date=&mt("may open later.");
242: return($status,$date);
243: }
244: if ($thistype eq 'date_interval') {
245: if ($temp eq 'opendate') {
246: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
247: }
248: if ($temp eq 'answerdate') {
249: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
250: }
251: }
252: &Apache::lonxml::debug("found :$date: for :$temp:");
253: if ($date eq '') {
254: $date = &mt("an unknown date"); $passed = 0;
255: } elsif ($date eq 'con_lost') {
256: $date = &mt("an indeterminate date"); $passed = 0;
257: } else {
258: if (time < $date) { $passed = 0; } else { $passed = 1; }
259: $date = localtime $date;
260: }
261: if (!$passed) { $type=$temp; last; }
262: }
263: &Apache::lonxml::debug("have :$type:$passed:");
264: if ($passed) {
265: $status='SHOW_ANSWER';
266: $datemsg=$date;
267: } elsif ($type eq 'opendate') {
268: $status='CLOSED';
269: $datemsg = &mt("will open on")." $date";
270: } elsif ($type eq 'duedate') {
271: $status='CAN_ANSWER';
272: $datemsg = &mt("is due at")." $date";
273: } elsif ($type eq 'answerdate') {
274: $status='CLOSED';
275: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
276: }
277: }
278: if ($status eq 'CAN_ANSWER') {
279: #check #tries, and if correct.
280: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
281: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
282: if ( $tries eq '' ) { $tries = '0'; }
283: if ( $maxtries eq '' &&
284: $ENV{'request.state'} ne 'construct') { $maxtries = '2'; }
285: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
286: # if (correct and show prob status) or excused then CANNOT_ANSWER
287: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
288: &&
289: lc($Apache::lonhomework::problemstatus) ne 'no')
290: ||
291: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
292: $status = 'CANNOT_ANSWER';
293: }
294: }
295: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
296: my $interval=&Apache::lonnet::EXT("resource.$id.interval");
297: &Apache::lonxml::debug("looking for interval $interval");
298: if ($interval) {
299: my $first_access=&Apache::lonnet::get_first_access('map');
300: &Apache::lonxml::debug("looking for accesstime $first_access");
301: if (!$first_access) {
302: $status='NOT_YET_VIEWED';
303: $datemsg=' '.$interval.' seconds';
304: } else {
305: my $newdate=localtime($first_access+$interval);
306: if (time > ($first_access+$interval)) {
307: $status='CLOSED';
308: $datemsg = &mt("was due on")." $newdate".&mt(", and answers will be available on")." $date";
309: } else {
310: $datemsg = &mt("is due at")." $newdate";
311: }
312: }
313: }
314: }
315: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
316: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
317: # return ('UNCHECKEDOUT','needs to be checked out');
318: #}
319:
320:
321: &Apache::lonxml::debug("sending back :$status:$datemsg:");
322: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
323: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
324: $status='CAN_ANSWER';
325: $datemsg=&mt('is closed but you are allowed to view it');
326: }
327:
328: return ($status,$datemsg);
329: }
330:
331: sub showhash {
332: my (%hash) = @_;
333: &showhashsubset(\%hash,'.');
334: return '';
335: }
336:
337: sub showarray {
338: my ($array)=@_;
339: my $string="(";
340: foreach my $elm (@{ $array }) {
341: if (ref($elm)) {
342: if ($elm =~ /ARRAY/ ) {
343: $string.=&showarray($elm);
344: }
345: } else {
346: $string.="$elm,"
347: }
348: }
349: chop($string);
350: $string.=")";
351: return $string;
352: }
353:
354: sub showhashsubset {
355: my ($hash,$keyre) = @_;
356: my $resultkey;
357: foreach $resultkey (sort keys %$hash) {
358: if ($resultkey =~ /$keyre/) {
359: if (ref($$hash{$resultkey})) {
360: if ($$hash{$resultkey} =~ /ARRAY/ ) {
361: &Apache::lonxml::debug("$resultkey ---- ".
362: &showarray($$hash{$resultkey}));
363: } elsif ($$hash{$resultkey} =~ /HASH/ ) {
364: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
365: &showhashsubset($$hash{$resultkey},'.');
366: } else {
367: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
368: }
369: } else {
370: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
371: }
372: }
373: }
374: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
375: return '';
376: }
377:
378: sub setuppermissions {
379: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
380: my $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
381: if (! $viewgrades &&
382: exists($ENV{'request.course.sec'}) &&
383: $ENV{'request.course.sec'} !~ /^\s*$/) {
384: $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}.
385: '/'.$ENV{'request.course.sec'});
386: }
387: $Apache::lonhomework::viewgrades = $viewgrades;
388: return ''
389: }
390:
391: sub setupheader {
392: my $request=$_[0];
393: if ($ENV{'browser.mathml'}) {
394: &Apache::loncommon::content_type($request,'text/xml');
395: } else {
396: &Apache::loncommon::content_type($request,'text/html');
397: }
398: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
399: &Apache::loncommon::no_cache($request);
400: }
401: $request->send_http_header;
402: return OK if $request->header_only;
403: return ''
404: }
405:
406: sub handle_save_or_undo {
407: my ($request,$problem,$result) = @_;
408: my $file = &Apache::lonnet::filelocation("",$request->uri);
409: my $filebak =$file.".bak";
410: my $filetmp =$file.".tmp";
411: my $error=0;
412:
413: &Apache::lonnet::correct_line_ends($result);
414:
415: if ($ENV{'form.Undo'} eq &mt('undo')) {
416: my $error=0;
417: if (!copy($file,$filetmp)) { $error=1; }
418: if ((!$error) && (!copy($filebak,$file))) { $error=1; }
419: if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
420: if (!$error) {
421: &Apache::lonxml::info("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");
422: } else {
423: &Apache::lonxml::info("<p><font color=\"red\" size=\"+1\"><b>".&mt("Unable to undo, unable to switch")." $filebak ".&mt("and")." $file</b></font></p>");
424: $error=1;
425: }
426: } else {
427: my $fs=Apache::File->new(">$filebak");
428: if (defined($fs)) {
429: print $fs $$problem;
430: &Apache::lonxml::info("<b>".&mt("Making Backup to").
431: " $filebak</b>");
432: } else {
433: &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");
434: $error=2;
435: }
436: my $fh=Apache::File->new(">$file");
437: if (defined($fh)) {
438: print $fh $$result;
439: &Apache::lonxml::info("<b>".&mt("Saving Modifications to").
440: " $file</b>");
441: } else {
442: &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".
443: &mt("Unable to write to")." $file</b></font>");
444: $error|=4;
445: }
446: }
447: return $error;
448: }
449:
450: sub analyze_header {
451: my ($request) = @_;
452: my $bodytag='<body bgcolor="#ffffff">';
453: if ($ENV{'environment.remote'} eq 'off') {
454: $bodytag=&Apache::loncommon::bodytag();
455: }
456: my $result.='<html>
457: <head><title>'.&mt("Analyzing a problem").'</title></head>
458: '.$bodytag.&Apache::lonxml::message_location().'
459: <form name="lonhomework" method="POST" action="'.
460: &HTML::Entities::encode($ENV{'request.uri'},'<>&"').'">'.
461: &Apache::structuretags::remember_problem_state().'
462: <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
463: <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
464: <hr />
465: <input type="submit" name="submit" value="'.&mt("View").'" />
466: <hr />
467: </form>';
468: &Apache::lonxml::add_messages(\$result);
469: $request->print($result);
470: $request->rflush();
471: }
472:
473: sub analyze_footer {
474: my ($request) = @_;
475: my $result='</body></html>';
476: $request->print($result);
477: $request->rflush();
478: }
479:
480: sub analyze {
481: my ($request,$file) = @_;
482: &Apache::lonxml::debug("Analyze");
483: my $result;
484: my %overall;
485: my %allparts;
486: my $rndseed=$ENV{'form.rndseed'};
487: &analyze_header($request);
488: my %prog_state=
489: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
490: &mt('Getting Problem Variants'),
491: $ENV{'form.numtoanalyze'},
492: 'inline',undef);
493: for(my $i=1;$i<$ENV{'form.numtoanalyze'}+1;$i++) {
494: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
495: &mt('last problem'));
496: if (&Apache::loncommon::connection_aborted($request)) { return; }
497: my $subresult=&Apache::lonnet::ssi($request->uri,
498: ('grade_target' => 'analyze'),
499: ('rndseed' => $i+$rndseed));
500: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
501: my %analyze=&Apache::lonnet::str2hash($subresult);
502: my @parts;
503: if (defined(@{ $analyze{'parts'} })) {
504: @parts=@{ $analyze{'parts'} };
505: }
506: foreach my $part (@parts) {
507: if (!exists($allparts{$part})) {$allparts{$part}=1;};
508: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
509: $analyze{$part.'.type'} eq 'stringresponse' ||
510: $analyze{$part.'.type'} eq 'formularesponse' ) {
511: push( @{ $overall{$part.'.answer'} },
512: [@{ $analyze{$part.'.answer'} }]);
513: }
514: }
515: }
516: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
517: &mt('Analyzing Results'));
518: $request->print('<hr />'.&mt('List of possible answers').': ');
519: foreach my $part (sort(keys(%allparts))) {
520: if (defined(@{ $overall{$part.'.answer'} })) {
521: my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
522: $request->print('<table><tr><td colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</td></tr>');
523: my %frequency;
524: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
525: $frequency{join("\0",@{ $answer })}++;
526: }
527: $request->print('<tr><td colspan="'.($num_cols).'">'.&mt('Answer').'</td><td>'.&mt('Frequency').'</td></tr>');
528: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
529: $request->print('<tr><td align="right">'.
530: join('</td><td align="right">',split("\0",$answer)).
531: '</td><td>('.$frequency{$answer}.
532: ')</td></tr>');
533: }
534: $request->print('</table>');
535: } else {
536: $request->print('<p>'.&mt('Response').' '.$part.' '.
537: &mt('is not analyzable at this time').'</p>');
538: }
539: }
540: if (scalar(keys(%allparts)) == 0 ) {
541: $request->print('<p>'.&mt('Found no analyzable respones in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
542: }
543: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
544: &analyze_footer($request);
545: &Apache::lonhomework::showhash(%overall);
546: return $result;
547: }
548:
549: sub editxmlmode {
550: my ($request,$file) = @_;
551: my $result;
552: my $problem=&Apache::lonnet::getfile($file);
553: if ($problem eq -1) {
554: &Apache::lonxml::error("<b> ".&mt('Unable to find').
555: " <i>$file</i></b>");
556: $problem='';
557: }
558: if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) {
559: my $error=&handle_save_or_undo($request,\$problem,
560: \$ENV{'form.editxmltext'});
561: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
562: }
563: &Apache::lonhomework::showhashsubset(\%ENV,'^form');
564: if ( $ENV{'form.submit'} eq &mt('Submit Changes and View') ) {
565: &Apache::lonhomework::showhashsubset(\%ENV,'^form');
566: $ENV{'form.problemmode'}='View';
567: &renderpage($request,$file);
568: } else {
569: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
570: my $xml_help = '<table><tr><td>'.
571: &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
572: "Problem Editing Help").
573: '</td><td>'.
574: &Apache::loncommon::help_open_menu('',undef,undef,undef,5,'Authoring').
575: '</td></tr></table>';
576: if ($cols > 80) { $cols = 80; }
577: if ($cols < 70) { $cols = 70; }
578: if ($rows < 20) { $rows = 20; }
579: my $bodytag='<body bgcolor="#ffffff">';
580: if ($ENV{'environment.remote'} eq 'off') {
581: $bodytag=&Apache::loncommon::bodytag();
582: }
583: $result.='<html>'.$bodytag.&Apache::lonxml::message_location().'
584: <form name="lonhomework" method="POST" action="'.
585: &HTML::Entities::encode($ENV{'request.uri'},'<>&"').'">'.
586: &Apache::structuretags::remember_problem_state().'
587: <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
588: <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
589: <input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
590: <hr />
591: <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
592: <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
593: <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
594: <hr />
595: ' . $xml_help . '
596: <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
597: &HTML::Entities::encode($problem,'<>&"').'</textarea>
598: </form></body></html>';
599: &Apache::lonxml::add_messages(\$result);
600: $request->print($result);
601: }
602: return '';
603: }
604:
605: sub renderpage {
606: my ($request,$file) = @_;
607:
608: my (@targets) = &get_target();
609: &Apache::lonhomework::showhashsubset(\%ENV,'form.');
610: &Apache::lonxml::debug("Running targets ".join(':',@targets));
611: my $overall_result;
612: foreach my $target (@targets) {
613: # FIXME need to do something intelligent when a problem goes
614: # from viewable to not viewable due to map conditions
615: #&setuppermissions();
616: #if ( $Apache::lonhomework::browse ne '2'
617: # && $Apache::lonhomework::browse ne 'F' ) {
618: # $request->print(" You most likely shouldn't see me.");
619: #}
620: #my $t0 = [&gettimeofday()];
621: my $problem=&Apache::lonnet::getfile($file);
622: if ($problem eq -1) {
623: &Apache::lonxml::error("<b> ".&mt('Unable to find')." <i>$file</i></b>");
624: $problem='';
625: }
626:
627: my %mystyle;
628: my $result = '';
629: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
630: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
631: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%ENV,'^form');}
632:
633: &Apache::lonxml::debug("Should be parsing now");
634: $result = &Apache::lonxml::xmlparse($request, $target, $problem,
635: &setup_vars($target),%mystyle);
636: undef($Apache::lonhomework::parsing_a_problem);
637: #$request->print("Result follows:");
638: if ($target eq 'modified') {
639: &handle_save_or_undo($request,\$problem,\$result);
640: } else {
641: if ($target eq 'analyze') {
642: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
643: undef(%Apache::lonhomework::analyze);
644: }
645: #my $td=&tv_interval($t0);
646: #if ( $Apache::lonxml::debug) {
647: #$result =~ s:</body>::;
648: #$result.="<br />Spent $td seconds processing target $target\n</body>";
649: #}
650: # $request->print($result);
651: $overall_result.=$result;
652: # $request->rflush();
653: }
654: #$request->print(":Result ends");
655: #my $td=&tv_interval($t0);
656: }
657: &Apache::lonxml::add_messages(\$overall_result);
658: $request->print($overall_result);
659: $request->rflush();
660: }
661:
662: # with no arg it returns a HTML <option> list of the template titles
663: # with one arg it returns the filename associated with the arg passed
664: sub get_template_list {
665: my ($namewanted,$extension) = @_;
666: my $result;
667: my @allnames;
668: &Apache::lonxml::debug("Looking for :$extension:");
669: foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
670: my $name=&Apache::lonnet::metadata($file,'title');
671: if ($namewanted && ($name eq $namewanted)) {
672: $result=$file;
673: last;
674: } else {
675: if ($name) { push (@allnames, $name); }
676: }
677: }
678: if (@allnames && !$result) {
679: $result="<option>".&mt("Select a")." $extension ".&mt('template')."</option>\n<option>".
680: join('</option><option>',sort(@allnames)).'</option>';
681: }
682: return $result;
683: }
684:
685: sub newproblem {
686: my ($request) = @_;
687: my $extension=$request->uri;
688: $extension=~s:^.*\.([\w]+)$:$1:;
689: &Apache::lonxml::debug("Looking for :$extension:");
690: my $templatelist=&get_template_list('',$extension);
691: if ($ENV{'form.template'} &&
692: $ENV{'form.template'} ne "Select a $extension template") {
693: use File::Copy;
694: my $file = &get_template_list($ENV{'form.template'},$extension);
695: my $dest = &Apache::lonnet::filelocation("",$request->uri);
696: copy($file,$dest);
697: &renderpage($request,$dest);
698: } elsif($ENV{'form.newfile'} && !$templatelist) {
699: # I don't like hard-coded filenames but for now, this will work.
700: use File::Copy;
701: my $templatefilename =
702: $request->dir_config('lonIncludes').'/templates/blank.problem';
703: &Apache::lonxml::debug("$templatefilename");
704: my $dest = &Apache::lonnet::filelocation("",$request->uri);
705: copy($templatefilename,$dest);
706: &renderpage($request,$dest);
707: } else {
708: my $url=&HTML::Entities::encode($request->uri,'<>&"');
709: my $shownurl=$url;
710: $shownurl=~s-^/~-/priv/-;
711: my $dest = &Apache::lonnet::filelocation("",$request->uri);
712: my $errormsg;
713: if ($ENV{'form.newfile'}) {
714: $errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";
715: }
716: my $instructions;
717: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
718: if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}
719: my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',
720: 'resource' => 'resource',
721: 'requested' => 'The requested file',
722: 'not exist' => 'currently does not exist',
723: 'createnew' => 'To create a new',
724: 'click' => 'click on the',
725: 'Create' => 'Create',
726: 'button' => 'button');
727: $request->print(<<ENDNEWPROBLEM);
728: $bodytag
729: <h1>$lt{'create'} $extension $lt{'resource'}</h1>
730: $errormsg
731: $lt{'requested'} <tt>$shownurl</tt> $lt{'not exist'}.
732: <p>
733: <b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>
734: </p>
735: <p><form action="$url" method="POST">
736: ENDNEWPROBLEM
737: if (defined($templatelist)) {
738: $request->print("<select name=\"template\">$templatelist</select>");
739: }
740: $request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");
741: $request->print("</form></p></body>");
742: }
743: return '';
744: }
745:
746: sub view_or_edit_menu {
747: my ($request) = @_;
748: my $url=&HTML::Entities::encode($request->uri,'<>&"');
749: my %lt=&Apache::lonlocal::texthash( 'would' => 'Would you like to',
750: 'view' => 'View',
751: 'Edit' => 'edit',
752: 'or' => 'or',
753: 'the problem' => 'the problem');
754: $request->print(<<EDITMENU);
755: <body bgcolor="#FFFFFF">
756: <form action="$url" method="POST">
757: $lt{'would'} <input type="submit" name="problemmode" accesskey="v" value="<{'view'}">
758: <{'or'} <input type="submit" name="problemmode" accesskey="e" value="<{'Edit'}">
759: <{'the problem'}.
760: </form>
761: </body>
762: EDITMENU
763: }
764:
765: sub handler {
766: #my $t0 = [&gettimeofday()];
767: my $request=$_[0];
768:
769: $Apache::lonxml::debug=$ENV{'user.debug'};
770: if (&setupheader($request)) { return OK; }
771: $ENV{'request.uri'}=$request->uri;
772: &setuppermissions();
773: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
774: # some times multiple problemmodes are submitted, need to select
775: # the last one
776: &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
777: if ( defined($ENV{'form.problemmode'}) &&
778: ref($ENV{'form.problemmode'}) ) {
779: &Apache::lonxml::debug("Problem Mode ".join(",",@$ENV{'form.problemmode'}));
780: my $mode=$ENV{'form.problemmode'}->[-1];
781: undef $ENV{'form.problemmode'};
782: $ENV{'form.problemmode'}=$mode;
783: }
784: &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
785: my $file=&Apache::lonnet::filelocation("",$request->uri);
786:
787: #check if we know where we are
788: if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) {
789: # if we are browsing we might not be able to know where we are
790: if ($Apache::lonhomework::browse ne 'F' &&
791: $ENV{'request.state'} ne "construct") {
792: #should know where we are, so ask
793: if ( &Apache::lonnet::mod_perl_version() == 2 ) {
794: &Apache::lonnet::cleanenv();
795: }
796: $request->internal_redirect('/adm/ambiguous'); return;
797: }
798: }
799:
800: my ($symb) = &Apache::lonxml::whichuser();
801: &Apache::lonxml::debug('symb is '.$symb);
802: if ($ENV{'request.state'} eq "construct" || $symb eq '') {
803: if ($ENV{'form.resetdata'} eq &mt('Reset Submissions') ||
804: $ENV{'form.resetdata'} eq &mt('New Problem Variation') ||
805: $ENV{'form.newrandomization'} eq &mt('New Randomization')) {
806: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
807: &Apache::lonnet::tmpreset($symb,'',$domain,$name);
808: &Apache::lonxml::debug("Attempt reset");
809: }
810: }
811: if ($ENV{'request.state'} eq "construct") {
812: if ( -e $file ) {
813: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
814: ['problemmode']);
815: if (!(defined $ENV{'form.problemmode'})) {
816: #first visit to problem in construction space
817: #&view_or_edit_menu($request);
818: $ENV{'form.problemmode'}='View';
819: &renderpage($request,$file);
820: } elsif ($ENV{'form.problemmode'} eq &mt('EditXML')) {
821: &editxmlmode($request,$file);
822: } elsif ($ENV{'form.problemmode'} eq &mt('Calculate answers')) {
823: &analyze($request,$file);
824: } else {
825: &renderpage($request,$file);
826: }
827: } else {
828: # requested file doesn't exist in contruction space
829: &newproblem($request);
830: }
831: } else {
832: # just render the page normally outside of construction space
833: &Apache::lonxml::debug("not construct");
834: &renderpage($request,$file);
835: }
836: #my $td=&tv_interval($t0);
837: #&Apache::lonxml::debug("Spent $td seconds processing");
838: # &Apache::lonhomework::send_footer($request);
839: # always turn off debug messages
840: $Apache::lonxml::debug=0;
841: return OK;
842:
843: }
844:
845: 1;
846: __END__
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