1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.341 2014/01/10 17:03:30 bisitz 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::functionplotresponse();
51: use Apache::drawimage();
52: use Apache::Constants qw(:common);
53: use Apache::loncommon();
54: use Apache::lonlocal;
55: use Time::HiRes qw( gettimeofday tv_interval );
56: use HTML::Entities();
57: use File::Copy();
58:
59: # FIXME - improve commenting
60:
61:
62: BEGIN {
63: &Apache::lonxml::register_insert();
64: }
65:
66:
67: =pod
68:
69: =item set_bubble_lines()
70:
71: Called at analysis time to set the bubble lines
72: hash for the problem.. This should be called in the
73: end_problemtype tag in analysis mode.
74:
75: We fetch the hash of part id counters from lonxml
76: and push them into analyze:{part_id.bubble_lines}.
77:
78: =cut
79:
80: sub set_bubble_lines {
81: my %bubble_counters = &Apache::lonxml::get_bubble_line_hash();
82:
83: foreach my $key (keys(%bubble_counters)) {
84: $Apache::lonhomework::analyze{"$key.bubble_lines"} =
85: $bubble_counters{"$key"};
86: }
87: }
88:
89: #
90: # Decides what targets to render for.
91: # Implicit inputs:
92: # Various session environment variables:
93: # request.state - published - is a /res/ resource
94: # uploaded - is a /uploaded/ resource
95: # contruct - is a /priv/ resource
96: # form.grade_target - a form parameter requesting a specific target
97: sub get_target {
98: &Apache::lonxml::debug("request.state = $env{'request.state'}");
99: if( defined($env{'form.grade_target'})) {
100: &Apache::lonxml::debug("form.grade_target= $env{'form.grade_target'}");
101: } else {
102: &Apache::lonxml::debug("form.grade_target <undefined>");
103: }
104: if (($env{'request.state'} eq "published") ||
105: ($env{'request.state'} eq "uploaded")) {
106: if ( defined($env{'form.grade_target'} )
107: && ($env{'form.grade_target'} eq 'tex')) {
108: return ($env{'form.grade_target'});
109: } elsif ( defined($env{'form.grade_target'} )
110: && ($Apache::lonhomework::viewgrades eq 'F' )) {
111: return ($env{'form.grade_target'});
112: } elsif ( $env{'form.grade_target'} eq 'webgrade'
113: && ($Apache::lonhomework::queuegrade eq 'F' )) {
114: return ($env{'form.grade_target'});
115: } elsif ($env{'form.grade_target'} eq 'answer') {
116: if ($env{'form.answer_output_mode'} eq 'tex') {
117: return ($env{'form.grade_target'});
118: }
119: }
120: if ($env{'form.webgrade'} &&
121: ($Apache::lonhomework::modifygrades eq 'F'
122: || $Apache::lonhomework::queuegrade eq 'F' )) {
123: return ('grade','webgrade');
124: }
125: if ( defined($env{'form.submitted'}) &&
126: ( !defined($env{'form.newrandomization'}))) {
127: return ('grade', 'web');
128: } else {
129: return ('web');
130: }
131: } elsif ($env{'request.state'} eq "construct") {
132: #
133: # We are in construction space, editing and testing problems
134: #
135: if ( defined($env{'form.grade_target'}) ) {
136: return ($env{'form.grade_target'});
137: }
138: if ( defined($env{'form.preview'})) {
139: if ( defined($env{'form.submitted'})) {
140: #
141: # We are doing a problem preview
142: #
143: return ('grade', 'web');
144: } else {
145: return ('web');
146: }
147: } else {
148: if ($env{'form.problemstate'} eq 'WEB_GRADE') {
149: return ('grade','webgrade','answer');
150: } elsif ($env{'form.problemmode'} eq 'view') {
151: return ('grade','web','answer');
152: } elsif ($env{'form.problemmode'} eq 'saveview') {
153: return ('modified','web','answer');
154: } elsif ($env{'form.problemmode'} eq 'discard') {
155: return ('web','answer');
156: } elsif (($env{'form.problemmode'} eq 'saveedit') ||
157: ($env{'form.problemmode'} eq 'undo')) {
158: return ('modified','no_output_web','edit');
159: } elsif ($env{'form.problemmode'} eq 'edit') {
160: return ('no_output_web','edit');
161: } else {
162: return ('web');
163: }
164: }
165: #
166: # End of Authoring Space
167: #
168: }
169: #
170: # Huh? We are nowhere, so do nothing.
171: #
172: return ();
173: }
174:
175: sub setup_vars {
176: my ($target) = @_;
177: return ';'
178: # return ';$external::target='.$target.';';
179: }
180:
181: sub proctor_checked_in {
182: my ($slot_name,$slot,$type)=@_;
183: my @possible_proctors=split(",",$slot->{'proctor'});
184:
185: return 1 if (!@possible_proctors);
186:
187: my $key;
188: if ($type eq 'Task') {
189: my $version=$Apache::lonhomework::history{'resource.0.version'};
190: $key ="resource.$version.0.checkedin";
191: } elsif ($type eq 'problem') {
192: $key ='resource.0.checkedin';
193: }
194: # backward compatability, used to be username@domain,
195: # now is username:domain
196: my $who = $Apache::lonhomework::history{$key};
197: if ($who !~ /:/) {
198: $who =~ tr/@/:/;
199: }
200: foreach my $possible (@possible_proctors) {
201: if ($who eq $possible
202: && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) {
203: return 1;
204: }
205: }
206:
207: return 0;
208: }
209:
210: sub check_slot_access {
211: my ($id,$type)=@_;
212:
213: # does it pass normal muster
214: my ($status,$datemsg)=&check_access($id);
215:
216: my $useslots = &Apache::lonnet::EXT("resource.0.useslots");
217: if ($useslots ne 'resource' && $useslots ne 'map'
218: && $useslots ne 'map_map') {
219: return ($status,$datemsg);
220: }
221:
222: if ($status eq 'SHOW_ANSWER' ||
223: $status eq 'CLOSED' ||
224: $status eq 'INVALID_ACCESS' ||
225: $status eq 'UNAVAILABLE') {
226: return ($status,$datemsg);
227: }
228: if ($env{'request.state'} eq "construct") {
229: return ($status,$datemsg);
230: }
231:
232: if ($type eq 'Task') {
233: my $version=$Apache::lonhomework::history{'resource.version'};
234: if ($Apache::lonhomework::history{"resource.$version.0.checkedin"} &&
235: $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') {
236: return ('SHOW_ANSWER');
237: }
238: }
239:
240: my $availablestudent = &Apache::lonnet::EXT("resource.0.availablestudent");
241: my $available = &Apache::lonnet::EXT("resource.0.available");
242: my @slots= (split(':',$availablestudent),split(':',$available));
243:
244: # if (!@slots) {
245: # return ($status,$datemsg);
246: # }
247: my $slotstatus='NOT_IN_A_SLOT';
248: my ($returned_slot,$slot_name);
249: my $now = time;
250: my $num_usable_slots = 0;
251: foreach my $slot (@slots) {
252: $slot =~ s/(^\s*|\s*$)//g;
253: &Apache::lonxml::debug("getting $slot");
254: my %slot=&Apache::lonnet::get_slot($slot);
255: &Apache::lonhomework::showhash(%slot);
256: next if ($slot{'endtime'} < $now);
257: $num_usable_slots ++;
258: if ($slot{'starttime'} < $now &&
259: $slot{'endtime'} > $now &&
260: &Apache::loncommon::check_ip_acc($slot{'ip'})) {
261: &Apache::lonxml::debug("$slot is good");
262: $slotstatus='NEEDS_CHECKIN';
263: $returned_slot=\%slot;
264: $slot_name=$slot;
265: last;
266: }
267: }
268: if ($slotstatus eq 'NEEDS_CHECKIN' &&
269: &proctor_checked_in($slot_name,$returned_slot,$type)) {
270: &Apache::lonxml::debug("proctor checked in");
271: $slotstatus=$status;
272: }
273:
274: my ($is_correct,$got_grade,$checkedin);
275: if ($type eq 'Task') {
276: my $version=$Apache::lonhomework::history{'resource.0.version'};
277: $got_grade =
278: ($Apache::lonhomework::history{"resource.$version.0.status"}
279: =~ /^(?:pass|fail)$/);
280: $is_correct =
281: ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass'
282: || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ );
283: $checkedin =
284: $Apache::lonhomework::history{"resource.$version.0.checkedin"};
285: } elsif ($type eq 'problem') {
286: $got_grade = 1;
287: $checkedin = $Apache::lonhomework::history{"resource.0.checkedin"};
288: $is_correct =
289: ($Apache::lonhomework::history{"resource.0.solved"} =~/^correct_/);
290: }
291:
292: &Apache::lonxml::debug(" slot is $slotstatus checkedin ($checkedin) got_grade ($got_grade) is_correct ($is_correct)");
293:
294: # no slot is currently open, and has been checked in for this version
295: # but hasn't got a grade, therefore must be awaiting a grade
296: if (!defined($slot_name)
297: && $checkedin
298: && !$got_grade) {
299: return ('WAITING_FOR_GRADE');
300: }
301:
302: # Previously used slot is no longer open, and has been checked in for this version.
303: # However, the problem is not closed, and potentially, another slot might be
304: # used to gain access to it to work on it, until the due date is reached, and the
305: # problem then becomes CLOSED. Therefore return the slotstatus -
306: # (which will be one of: NOT_IN_A_SLOT, RESERVABLE, RESERVABLE_LATER, or NOTRESERVABLE.
307: if (!defined($slot_name) && $type eq 'problem') {
308: if ($slotstatus eq 'NOT_IN_A_SLOT') {
309: if (!$num_usable_slots) {
310: if ($env{'request.course.id'}) {
311: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
312: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
313: my ($symb)=&Apache::lonnet::whichuser();
314: $slotstatus = 'NOTRESERVABLE';
315: my ($reservable_now_order,$reservable_now,$reservable_future_order,
316: $reservable_future) =
317: &Apache::loncommon::get_future_slots($cnum,$cdom,$now,$symb);
318: if ((ref($reservable_now_order) eq 'ARRAY') && (ref($reservable_now) eq 'HASH')) {
319: if (@{$reservable_now_order} > 0) {
320: $slotstatus = 'RESERVABLE';
321: $datemsg = $reservable_now->{$reservable_now_order->[-1]}{'endreserve'};
322: }
323: }
324: unless ($slotstatus eq 'RESERVABLE') {
325: if ((ref($reservable_future_order) eq 'ARRAY') && (ref($reservable_future) eq 'HASH')) {
326: if (@{$reservable_future_order} > 0) {
327: $slotstatus = 'RESERVABLE_LATER';
328: $datemsg = $reservable_future->{$reservable_future_order->[0]}{'startreserve'};
329: }
330: }
331: }
332: }
333: }
334: }
335: return ($slotstatus,$datemsg);
336: }
337:
338: if ($slotstatus eq 'NOT_IN_A_SLOT'
339: && $checkedin ) {
340:
341: if ($got_grade) {
342: return ('SHOW_ANSWER');
343: } else {
344: return ('WAITING_FOR_GRADE');
345: }
346:
347: }
348:
349: if ( $is_correct) {
350: if ($type eq 'problem') {
351: return ($status);
352: }
353: return ('SHOW_ANSWER');
354: }
355:
356: if ( $status eq 'CANNOT_ANSWER' &&
357: ($slotstatus ne 'NEEDS_CHECKIN' && $slotstatus ne 'NOT_IN_A_SLOT')) {
358: return ($status,$datemsg);
359: }
360:
361: return ($slotstatus,$datemsg,$slot_name,$returned_slot);
362: }
363:
364: # JB, 9/24/2002: Any changes in this function may require a change
365: # in lonnavmaps::resource::getDateStatus.
366: sub check_access {
367: my ($id) = @_;
368: my $date ='';
369: my $status;
370: my $datemsg = '';
371: my $lastdate = '';
372: my $type;
373: my $passed;
374:
375: if ($env{'request.state'} eq "construct") {
376: if ($env{'form.problemstate'}) {
377: if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
378: if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct'
379: && &hide_problem_status())) {
380: return ('CANNOT_ANSWER',
381: &mt('is in this state due to author settings.'));
382: }
383: } else {
384: return ($env{'form.problemstate'},
385: &mt('is in this state due to author settings.'));
386: }
387: }
388: &Apache::lonxml::debug("in construction ignoring dates");
389: $status='CAN_ANSWER';
390: $datemsg=&mt('is in under construction');
391: # return ($status,$datemsg);
392: }
393:
394: &Apache::lonxml::debug("checking for part :$id:");
395: &Apache::lonxml::debug("time:".time);
396:
397: my ($symb)=&Apache::lonnet::whichuser();
398: &Apache::lonxml::debug("symb:".$symb);
399: #if ($env{'request.state'} ne "construct" && $symb ne '') {
400: if ($env{'request.state'} ne "construct") {
401: my $idacc = &Apache::lonnet::EXT("resource.$id.acc");
402: my $allowed=&Apache::loncommon::check_ip_acc($idacc);
403: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
404: $status='INVALID_ACCESS';
405: $date=&mt("can not be accessed from your location.");
406: return($status,$date);
407: }
408: if ($env{'form.grade_imsexport'}) {
409: if (($env{'request.course.id'}) &&
410: (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
411: return ('SHOW_ANSWER');
412: }
413: }
414: foreach my $temp ("opendate","duedate","answerdate") {
415: $lastdate = $date;
416: if ($temp eq 'duedate') {
417: $date = &due_date($id);
418: } else {
419: $date = &Apache::lonnet::EXT("resource.$id.$temp");
420: }
421:
422: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
423: if ($thistype =~ /^(con_lost|no_such_host)/ ||
424: $date =~ /^(con_lost|no_such_host)/) {
425: $status='UNAVAILABLE';
426: $date=&mt("may open later.");
427: return($status,$date);
428: }
429: if ($thistype eq 'date_interval') {
430: if ($temp eq 'opendate') {
431: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
432: }
433: if ($temp eq 'answerdate') {
434: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
435: }
436: }
437: &Apache::lonxml::debug("found :$date: for :$temp:");
438: if ($date eq '') {
439: $date = &mt("an unknown date"); $passed = 0;
440: } elsif ($date eq 'con_lost') {
441: $date = &mt("an indeterminate date"); $passed = 0;
442: } else {
443: if (time < $date) { $passed = 0; } else { $passed = 1; }
444: $date = &Apache::lonlocal::locallocaltime($date);
445: }
446: if (!$passed) { $type=$temp; last; }
447: }
448: &Apache::lonxml::debug("have :$type:$passed:");
449: if ($passed) {
450: $status='SHOW_ANSWER';
451: $datemsg=$date;
452: } elsif ($type eq 'opendate') {
453: $status='CLOSED';
454: $datemsg = &mt("will open on")." $date";
455: } elsif ($type eq 'duedate') {
456: $status='CAN_ANSWER';
457: $datemsg = &mt("is due at")." $date";
458: } elsif ($type eq 'answerdate') {
459: $status='CLOSED';
460: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
461: }
462: }
463: if ($status eq 'CAN_ANSWER' ||
464: (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
465: #check #tries, and if correct.
466: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
467: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
468: if ( $tries eq '' ) { $tries = '0'; }
469: if ( $maxtries eq '' &&
470: $env{'request.state'} ne 'construct') { $maxtries = '2'; }
471: $Apache::lonhomework::results{'resource.'.$id.'.maxtries'}=$maxtries;
472: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
473: # if (correct and show prob status) or excused then CANNOT_ANSWER
474: if ( ($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/)
475: && (&show_problem_status()) ) {
476: if (($Apache::lonhomework::history{"resource.$id.awarded"} >= 1) ||
477: (&Apache::lonnet::EXT("resource.$id.retrypartial") !~/^1|on|yes$/i)) {
478: $status = 'CANNOT_ANSWER';
479: }
480: } elsif ($Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
481: $status = 'CANNOT_ANSWER';
482: }
483: if ($status eq 'CANNOT_ANSWER'
484: && &show_answer_problem_status()) {
485: $status = 'SHOW_ANSWER';
486: }
487: }
488: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
489: my @interval=&Apache::lonnet::EXT("resource.$id.interval");
490: &Apache::lonxml::debug("looking for interval @interval");
491: if ($interval[0]) {
492: my $first_access=&Apache::lonnet::get_first_access($interval[1]);
493: &Apache::lonxml::debug("looking for accesstime $first_access");
494: if (!$first_access) {
495: $status='NOT_YET_VIEWED';
496: my $due_date = &due_date($id);
497: my $seconds_left = $due_date - time;
498: if ($seconds_left > $interval[0] || $due_date eq '') {
499: $seconds_left = $interval[0];
500: }
501: $datemsg=&seconds_to_human_length($seconds_left);
502: }
503: }
504: }
505:
506: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
507: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
508: # return ('UNCHECKEDOUT','needs to be checked out');
509: #}
510:
511: &Apache::lonxml::debug("sending back :$status:$datemsg:");
512: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
513: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
514: $status='CAN_ANSWER';
515: $datemsg=&mt('is closed but you are allowed to view it');
516: }
517:
518: return ($status,$datemsg);
519: }
520: # this should work exactly like the copy in lonnavmaps.pm
521: sub due_date {
522: my ($part_id,$symb,$udom,$uname)=@_;
523: my $date;
524: my @interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb,
525: $udom,$uname);
526: &Apache::lonxml::debug("looking for interval $part_id $symb @interval");
527: my $due_date= &Apache::lonnet::EXT("resource.$part_id.duedate",$symb,
528: $udom,$uname);
529: &Apache::lonxml::debug("looking for due_date $part_id $symb $due_date");
530: if ($interval[0] =~ /\d+/) {
531: my $first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
532: &Apache::lonxml::debug("looking for first_access $first_access ($interval[1])");
533: if (defined($first_access)) {
534: my $interval = $first_access+$interval[0];
535: $date = (!$due_date || $interval < $due_date) ? $interval
536: : $due_date;
537: } else {
538: $date = $due_date;
539: }
540: } else {
541: $date = $due_date;
542: }
543: return $date
544: }
545:
546: sub seconds_to_human_length {
547: my ($length)=@_;
548:
549: my $seconds=$length%60; $length=int($length/60);
550: my $minutes=$length%60; $length=int($length/60);
551: my $hours=$length%24; $length=int($length/24);
552: my $days=$length;
553:
554: my $timestr;
555: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
556: if ($hours > 0) { $timestr.=($timestr?", ":"").
557: &mt('[quant,_1,hour]',$hours); }
558: if ($minutes > 0) { $timestr.=($timestr?", ":"").
559: &mt('[quant,_1,minute]',$minutes); }
560: if ($seconds > 0) { $timestr.=($timestr?", ":"").
561: &mt('[quant,_1,second]',$seconds); }
562: return $timestr;
563: }
564:
565: sub showhash {
566: my (%hash) = @_;
567: &showhashsubset(\%hash,'.');
568: return '';
569: }
570:
571: sub showarray {
572: my ($array)=@_;
573: my $string="(";
574: foreach my $elm (@{ $array }) {
575: if (ref($elm) eq 'ARRAY') {
576: $string.=&showarray($elm);
577: } elsif (ref($elm) eq 'HASH') {
578: $string.= "HASH --- \n<br />";
579: $string.= &showhashsubset($elm,'.');
580: } else {
581: $string.="$elm,"
582: }
583: }
584: chop($string);
585: $string.=")";
586: return $string;
587: }
588:
589: sub showhashsubset {
590: my ($hash,$keyre) = @_;
591: my $resultkey;
592: foreach $resultkey (sort keys %$hash) {
593: if ($resultkey !~ /$keyre/) { next; }
594: if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
595: &Apache::lonxml::debug("$resultkey ---- ".
596: &showarray($$hash{$resultkey}));
597: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
598: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
599: &showhashsubset($$hash{$resultkey},'.');
600: } else {
601: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
602: }
603: }
604: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
605: return '';
606: }
607:
608: sub setuppermissions {
609: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
610: unless ($Apache::lonhomework::browse eq 'F') {
611: $Apache::lonhomework::browse=&Apache::lonnet::allowed('bro',$env{'request.filename'});
612: }
613: my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
614: if (! $viewgrades &&
615: exists($env{'request.course.sec'}) &&
616: $env{'request.course.sec'} !~ /^\s*$/) {
617: $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
618: '/'.$env{'request.course.sec'});
619: }
620: $Apache::lonhomework::viewgrades = $viewgrades;
621:
622: if ($Apache::lonhomework::browse eq 'F' &&
623: $env{'form.devalidatecourseresdata'} eq 'on') {
624: my (undef,$courseid) = &Apache::lonnet::whichuser();
625: &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
626: $env{"course.$courseid.domain"});
627: }
628:
629: my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
630: if (! $modifygrades &&
631: exists($env{'request.course.sec'}) &&
632: $env{'request.course.sec'} !~ /^\s*$/) {
633: $modifygrades =
634: &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
635: '/'.$env{'request.course.sec'});
636: }
637: $Apache::lonhomework::modifygrades = $modifygrades;
638:
639: my $queuegrade = &Apache::lonnet::allowed('mqg',$env{'request.course.id'});
640: if (! $queuegrade &&
641: exists($env{'request.course.sec'}) &&
642: $env{'request.course.sec'} !~ /^\s*$/) {
643: $queuegrade =
644: &Apache::lonnet::allowed('qgr',$env{'request.course.id'}.
645: '/'.$env{'request.course.sec'});
646: }
647: $Apache::lonhomework::queuegrade = $queuegrade;
648: return '';
649: }
650:
651: sub unset_permissions {
652: undef($Apache::lonhomework::queuegrade);
653: undef($Apache::lonhomework::modifygrades);
654: undef($Apache::lonhomework::viewgrades);
655: undef($Apache::lonhomework::browse);
656: }
657:
658: sub setupheader {
659: my $request=$_[0];
660: &Apache::loncommon::content_type($request,'text/html');
661: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
662: &Apache::loncommon::no_cache($request);
663: }
664: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
665: # 'lastrevisiondate'));
666: $request->send_http_header;
667: return OK if $request->header_only;
668: return ''
669: }
670:
671: sub handle_save_or_undo {
672: my ($request,$problem,$result,$getobjref) = @_;
673:
674: my $file = &Apache::lonnet::filelocation("",$request->uri);
675: my $filebak =$file.".bak";
676: my $filetmp =$file.".tmp";
677: my $error=0;
678: if (($env{'form.problemmode'} eq 'undo') || ($env{'form.problemmode'} eq 'undoxml')) {
679: my $error=0;
680: if (!&File::Copy::copy($file,$filetmp)) { $error=1; }
681: if ((!$error) && (!&File::Copy::copy($filebak,$file))) { $error=1; }
682: if ((!$error) && (!&File::Copy::move($filetmp,$filebak))) { $error=1; }
683: if (!$error) {
684: &Apache::lonxml::info("<p><b>".
685: &mt("Undid changes, Switched [_1] and [_2]",
686: '<span class="LC_filename">'.$filebak.
687: '</span>',
688: '<span class="LC_filename">'.$file.
689: '</span>')."</b></p>");
690: } else {
691: &Apache::lonxml::info("<p><span class=\"LC_error\">".
692: &mt("Unable to undo, unable to switch [_1] and [_2]",
693: '<span class="LC_filename">'.
694: $filebak.'</span>',
695: '<span class="LC_filename">'.
696: $file.'</span>')."</span></p>");
697: $error=1;
698: }
699: } else {
700: &Apache::lonnet::correct_line_ends($result);
701:
702: my $fs=Apache::File->new(">$filebak");
703: if (defined($fs)) {
704: print $fs $$problem;
705: } else {
706: &Apache::lonxml::info("<span class=\"LC_error\">".
707: &mt("Unable to make backup [_1]",
708: '<span class="LC_filename">'.
709: $filebak.'</span>')."</span>");
710: $error=2;
711: }
712: my $fh=Apache::File->new(">$file");
713: if (defined($fh)) {
714: print $fh $$result;
715: if (ref($getobjref) eq 'SCALAR') {
716: if ($file =~ m{([^/]+)\.(html?)$}) {
717: my $fname = $1;
718: my $ext = $2;
719: my $path = $file;
720: $path =~ s/\Q$fname\E\.\Q$ext\E$//;
721: my (%allfiles,%codebase);
722: &Apache::lonnet::extract_embedded_items($file,\%allfiles,
723: \%codebase,$result);
724: if (keys(%allfiles) > 0) {
725: my $url = $request->uri;
726: my $state = <<STATE;
727: <input type="hidden" name="action" value="upload_embedded" />
728: <input type="hidden" name="url" value="$url" />
729: STATE
730: $$getobjref = "<h3>".&mt("Reference Warning")."</h3>".
731: "<p>".&mt("Completed upload of the file. This file contained references to other files.")."</p>".
732: "<p>".&mt("Please select the locations from which the referenced files are to be uploaded.")."</p>".
733: &Apache::loncommon::ask_for_embedded_content($url,$state,\%allfiles,\%codebase,
734: {'error_on_invalid_names' => 1,
735: 'ignore_remote_references' => 1,});
736: }
737: }
738: }
739: } else {
740: &Apache::lonxml::info('<span class="LC_error">'.
741: &mt("Unable to write to [_1]",
742: '<span class="LC_filename">'.
743: $file.'</span>').
744: '</span>');
745: $error|=4;
746: }
747: }
748: return $error;
749: }
750:
751: sub analyze_header {
752: my ($request) = @_;
753: my $js = &Apache::structuretags::setmode_javascript();
754:
755: # Breadcrumbs
756: my $brcrum = [{'href' => &Apache::loncommon::authorspace($request->uri),
757: 'text' => 'Authoring Space'},
758: {'href' => '',
759: 'text' => 'Problem Testing'},
760: {'href' => '',
761: 'text' => 'Analyzing a problem'}];
762:
763: my $result =
764: &Apache::loncommon::start_page('Analyzing a problem',
765: $js,
766: {'bread_crumbs' => $brcrum,})
767: .&Apache::loncommon::head_subbox(
768: &Apache::loncommon::CSTR_pageheader());
769: $result .=
770: &Apache::lonxml::message_location().'
771: <form name="lonhomework" method="post" action="'.
772: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
773: '<input type="hidden" name="problemmode" value="'.
774: $env{'form.problemmode'}.'" />'.
775: &Apache::structuretags::remember_problem_state().'
776: <div class="LC_edit_problem_analyze_header">
777: <input type="button" name="submitmode" value="'.&mt("EditXML").'" '.
778: 'onclick="javascript:setmode(this.form,'."'editxml'".')" />
779: <input type="button" name="submitmode" value="'.&mt('Edit').'" '.
780: 'onclick="javascript:setmode(this.form,'."'edit'".')" />
781: <hr />
782: <input type="button" name="submitmode" value="'.&mt("View").'" '.
783: 'onclick="javascript:setmode(this.form,'."'view'".')" />
784: <hr />
785: </div>
786: </form>';
787: &Apache::lonxml::add_messages(\$result);
788: $request->print($result);
789: $request->rflush();
790: }
791:
792: sub analyze_footer {
793: my ($request) = @_;
794: $request->print(&Apache::loncommon::end_page());
795: $request->rflush();
796: }
797:
798: sub analyze {
799: my ($request,$file) = @_;
800: &Apache::lonxml::debug("Analyze");
801: my $result;
802: my %overall;
803: my %seedexample;
804: my %allparts;
805: my $rndseed=$env{'form.rndseed'};
806: &analyze_header($request);
807: my %prog_state=
808: &Apache::lonhtmlcommon::Create_PrgWin($request,$env{'form.numtoanalyze'});
809: for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
810: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,'last problem');
811: if (&Apache::loncommon::connection_aborted($request)) { return; }
812: my $thisseed=$i+$rndseed;
813: my $subresult=&Apache::lonnet::ssi($request->uri,
814: ('grade_target' => 'analyze'),
815: ('rndseed' => $thisseed));
816: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
817: my %analyze=&Apache::lonnet::str2hash($subresult);
818: my @parts;
819: if (ref($analyze{'parts'}) eq 'ARRAY') {
820: @parts=@{ $analyze{'parts'} };
821: }
822: foreach my $part (@parts) {
823: if (!exists($allparts{$part})) {$allparts{$part}=1;};
824: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
825: $analyze{$part.'.type'} eq 'stringresponse' ||
826: $analyze{$part.'.type'} eq 'formularesponse' ) {
827: foreach my $name (keys(%{ $analyze{$part.'.answer'} })) {
828: my $i=0;
829: foreach my $answer_part (@{ $analyze{$part.'.answer'}{$name} }) {
830: push( @{ $overall{$part.'.answer'}[$i] },
831: $answer_part);
832: my $concatanswer= join("\0",@{ $answer_part });
833: if (($concatanswer eq '') || ($concatanswer=~/^\@/)) {
834: $answer_part = ['<span class="LC_error">'.&mt('Error').'</span>'];
835: }
836: $seedexample{join("\0",$part,$i,@{$answer_part})}=
837: $thisseed;
838: $i++;
839: }
840: }
841: if (!keys(%{ $analyze{$part.'.answer'} })) {
842: my $answer_part =
843: ['<span class="LC_error">'.&mt('Error').'</span>'];
844: $seedexample{join("\0",$part,0,@{$answer_part})}=
845: $thisseed;
846: push( @{ $overall{$part.'.answer'}[0] },
847: $answer_part);
848: }
849: }
850: }
851: }
852: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,&mt('Analyzing Results'));
853: $request->print('<hr />'
854: .'<h3>'
855: .&mt('List of possible answers')
856: .'</h3>'
857: );
858: foreach my $part (sort(keys(%allparts))) {
859: if ((ref($overall{$part.'.answer'}) eq 'ARRAY') &&
860: (@{$overall{$part.'.answer'}} > 0)) {
861: for (my $i=0;$i<scalar(@{ $overall{$part.'.answer'} });$i++) {
862: my $num_cols=scalar(@{ $overall{$part.'.answer'}[$i][0] });
863: $request->print(&Apache::loncommon::start_data_table()
864: .&Apache::loncommon::start_data_table_header_row()
865: .'<th colspan="'.($num_cols+1).'">'
866: .&mt('Part').' '.$part
867: );
868: if (scalar(@{ $overall{$part.'.answer'} }) > 1) {
869: $request->print(' '.&mt('Answer [_1]',$i+1));
870: }
871: $request->print('</th>'
872: .&Apache::loncommon::end_data_table_header_row()
873: );
874: my %frequency;
875: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'}[$i] })) {
876: $frequency{join("\0",@{ $answer })}++;
877: }
878: $request->print(&Apache::loncommon::start_data_table_header_row()
879: .'<th colspan="'.($num_cols).'">'.&mt('Answer').'</th>'
880: .'<th>'.&mt('Frequency').'<br />'
881: .'('.&mt('click for example').')</th>'
882: .&Apache::loncommon::end_data_table_header_row()
883: );
884: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
885: $request->print(&Apache::loncommon::start_data_table_row()
886: .'<td>'
887: .join('</td><td>',split("\0",$answer))
888: .'</td>'
889: .'<td>'
890: .'<a href="'.$request->uri.'?rndseed='.$seedexample{join("\0",$part,$i,$answer)}.'">'.$frequency{$answer}.'</a>'
891: .'</td>'
892: .&Apache::loncommon::end_data_table_row()
893: );
894: }
895: $request->print(&Apache::loncommon::end_data_table());
896: }
897: } else {
898: $request->print('<p class="LC_warning">'
899: .&mt('Response [_1] is not analyzable at this time.',$part)
900: .'</p>'
901: );
902: }
903: }
904: if (scalar(keys(%allparts)) == 0 ) {
905: $request->print('<p class="LC_warning">'
906: .&mt('Found no analyzable responses in this problem.'
907: .' Currently only Numerical, Formula and String response styles are supported.')
908: .'</p>'
909: );
910: }
911: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
912: &analyze_footer($request);
913: &Apache::lonhomework::showhash(%overall);
914: return $result;
915: }
916:
917: {
918: my $show_problem_status;
919: sub reset_show_problem_status {
920: undef($show_problem_status);
921: }
922:
923: sub set_show_problem_status {
924: my ($new_status) = @_;
925: $show_problem_status = lc($new_status);
926: }
927:
928: sub hide_problem_status {
929: return ($show_problem_status eq 'no'
930: || $show_problem_status eq 'no_feedback_ever');
931: }
932:
933: sub show_problem_status {
934: return ($show_problem_status eq 'yes'
935: || $show_problem_status eq 'answer'
936: || $show_problem_status eq '');
937: }
938:
939: sub show_some_problem_status {
940: return ($show_problem_status eq 'no');
941: }
942:
943: sub show_no_problem_status {
944: return ($show_problem_status eq 'no_feedback_ever');
945: }
946:
947: sub show_answer_problem_status {
948: return ($show_problem_status eq 'answer');
949: }
950: }
951:
952: sub editxmlmode {
953: my ($request,$file) = @_;
954: my $result;
955: my $problem=&Apache::lonnet::getfile($file);
956: if ($problem eq -1) {
957: &Apache::lonxml::error(
958: '<p class="LC_error">'
959: .&mt('Unable to find [_1]',
960: '<span class="LC_filename">'.$file.'</span>')
961: .'</p>');
962:
963: $problem='';
964: }
965:
966: if (($env{'form.problemmode'} eq 'saveeditxml') ||
967: ($env{'form.problemmode'} eq 'saveviewxml') ||
968: ($env{'form.problemmode'} eq 'undoxml')) {
969: my $error=&handle_save_or_undo($request,\$problem,
970: \$env{'form.editxmltext'});
971: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
972: }
973: &Apache::lonhomework::showhashsubset(\%env,'^form');
974: if ($env{'form.problemmode'} eq 'saveviewxml') {
975: &Apache::lonhomework::showhashsubset(\%env,'^form');
976: $env{'form.problemmode'}='view';
977: &renderpage($request,$file);
978: } else {
979: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
980: if ($cols > 80) { $cols = 80; }
981: if ($cols < 70) { $cols = 70; }
982: if ($rows < 20) { $rows = 20; }
983: my $js =
984: &Apache::edit::js_change_detection().
985: &Apache::loncommon::resize_textarea_js().
986: &Apache::structuretags::setmode_javascript().
987: &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
988:
989: # Breadcrumbs
990: my $brcrum = [{'href' => &Apache::loncommon::authorspace($request->uri),
991: 'text' => 'Authoring Space'},
992: {'href' => '',
993: 'text' => 'Problem Editing'}];
994:
995: my $start_page =
996: &Apache::loncommon::start_page(&mt("EditXML [_1]",$file),$js,
997: {'no_auto_mt_title' => 1,
998: 'only_body' => 0,
999: 'add_entries' => {
1000: 'onresize' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
1001: 'onload' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
1002: },
1003: 'bread_crumbs' => $brcrum,
1004: });
1005:
1006: $result=$start_page
1007: .&Apache::loncommon::head_subbox(
1008: &Apache::loncommon::CSTR_pageheader());
1009: $result.=&renderpage($request,$file,['no_output_web'],1).
1010: '<form '.&Apache::edit::form_change_detection().' name="lonhomework" method="post" action="'.
1011: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
1012: &Apache::structuretags::remember_problem_state().'
1013: <div class="LC_edit_problem_editxml_header">
1014: <table class="LC_edit_problem_header_title"><tr><td>
1015: <h2>'.&mt('Problem Editing').' '.&Apache::loncommon::help_open_topic('Problem_Editor_XML_Index').'</h2>
1016: </td><td align="right">
1017: '.&Apache::loncommon::helpLatexCheatsheet('Problem_LON-CAPA_Functions','Script Functions').'
1018: </td></tr>
1019: </table>';
1020:
1021: $result.='<input type="hidden" name="problemmode" value="saveedit" />'.
1022: &Apache::structuretags::problem_edit_buttons('editxml');
1023:
1024: $result.='<hr style="clear:both;" />'.&Apache::lonxml::message_location().'</div>'.
1025: '<textarea '.&Apache::edit::element_change_detection().
1026: ' rows="'.$rows.'" cols="'.$cols.'" style="width:100%" '.
1027: ' name="editxmltext" id="LC_editxmltext">'.
1028: &HTML::Entities::encode($problem,'<>&"').'</textarea>
1029: <div id="LC_aftertextarea">
1030: </div>
1031: </form>'.&Apache::loncommon::end_page();
1032: &Apache::lonxml::add_messages(\$result);
1033: $request->print($result);
1034: }
1035: return '';
1036: }
1037:
1038: #
1039: # Render the page in whatever target desired.
1040: #
1041: sub renderpage {
1042: my ($request,$file,$targets,$return_string) = @_;
1043:
1044: my @targets = @{$targets || [&get_target()]};
1045: &Apache::lonhomework::showhashsubset(\%env,'form.');
1046: &Apache::lonxml::debug("Running targets ".join(':',@targets));
1047:
1048: my $overall_result;
1049: foreach my $target (@targets) {
1050: # FIXME need to do something intelligent when a problem goes
1051: # from viewable to not viewable due to map conditions
1052: #&setuppermissions();
1053: #if ( $Apache::lonhomework::browse ne '2'
1054: # && $Apache::lonhomework::browse ne 'F' ) {
1055: # $request->print(" You most likely shouldn't see me.");
1056: #}
1057: #my $t0 = [&gettimeofday()];
1058: my $output=1;
1059: if ($target eq 'no_output_web') {
1060: $target = 'web'; $output=0;
1061: }
1062: my $problem=&Apache::lonnet::getfile($file);
1063: my $result;
1064: if ($problem eq -1) {
1065: $problem='';
1066: my $filename=(split('/',$file))[-1];
1067: my $error =
1068: &mt('Unable to find [_1]',
1069: '<span class="LC_filename">'.$filename.'</span>');
1070: $result.=
1071: &Apache::loncommon::simple_error_page($request,'Not available',
1072: $error,{'no_auto_mt_msg' => 1});
1073: return;
1074: }
1075:
1076: my %mystyle;
1077: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
1078: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
1079: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
1080:
1081: &Apache::lonxml::debug("Should be parsing now");
1082: $result .= &Apache::lonxml::xmlparse($request, $target, $problem,
1083: &setup_vars($target),%mystyle);
1084: &finished_parsing();
1085: if (!$output) { $result = ''; }
1086: #$request->print("Result follows:");
1087: if ($target eq 'modified') {
1088: &handle_save_or_undo($request,\$problem,\$result);
1089: } else {
1090: if ($target eq 'analyze') {
1091: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
1092: undef(%Apache::lonhomework::analyze);
1093: }
1094: #my $td=&tv_interval($t0);
1095: #if ( $Apache::lonxml::debug) {
1096: #$result =~ s:</body>::;
1097: #$result.="<br />Spent $td seconds processing target $target\n</body>";
1098: #}
1099: # $request->print($result);
1100: $overall_result.=$result;
1101: # $request->rflush();
1102: }
1103: #$request->print(":Result ends");
1104: #my $td=&tv_interval($t0);
1105: }
1106: if (!$return_string) {
1107: &Apache::lonxml::add_messages(\$overall_result);
1108: $request->print($overall_result);
1109: $request->rflush();
1110: } else {
1111: return $overall_result;
1112: }
1113: }
1114:
1115: sub finished_parsing {
1116: undef($Apache::lonhomework::parsing_a_problem);
1117: undef($Apache::lonhomework::parsing_a_task);
1118: }
1119:
1120: sub get_template_list {
1121: my ($extension) = @_;
1122: my $result;
1123: my @allnames;
1124: &Apache::lonxml::debug("Looking for :$extension:");
1125: my $glob_extension = $extension;
1126: if ($extension eq 'survey' || $extension eq 'exam') {
1127: $glob_extension = 'problem';
1128: }
1129: my @files = glob($Apache::lonnet::perlvar{'lonIncludes'}.
1130: '/templates/*.'.$glob_extension);
1131: @files = map {[$_,&mt(&Apache::lonnet::metadata($_, 'title')),
1132: (&Apache::lonnet::metadata($_, 'category')?&mt(&Apache::lonnet::metadata($_, 'category')):&mt('Miscellaneous')),
1133: &mt(&Apache::lonnet::metadata($_, 'help'))]} (@files);
1134: @files = sort {$a->[2].$a->[1] cmp $b->[2].$b->[1]} (@files);
1135: my ($midpoint,$seconddiv,$numfiles);
1136: my @noexamplelink = ('blank.problem','blank.library','script.library');
1137: $numfiles = 0;
1138: foreach my $file (@files) {
1139: next if ($file->[1] !~ /\S/);
1140: $numfiles ++;
1141: }
1142: if ($numfiles > 0) {
1143: $result = '<div class="LC_left_float">';
1144: $midpoint = int($numfiles/2);
1145: if ($numfiles%2) {
1146: $midpoint ++;
1147: }
1148: }
1149: my $count = 0;
1150: my $currentcategory='';
1151: my $first = 1;
1152: my $londocroot = $Apache::lonnet::perlvar{'lonDocRoot'};
1153: foreach my $file (@files) {
1154: next if ($file->[1] !~ /\S/);
1155: if ($file->[2] ne $currentcategory) {
1156: $currentcategory=$file->[2];
1157: if ((!$seconddiv) && ($count >= $midpoint)) {
1158: $result .= '</div></div>'."\n".'<div class="LC_left_float">'."\n";
1159: $seconddiv = 1;
1160: } elsif (!$first) {
1161: $result.='</div>'."\n";
1162: } else {
1163: $first = 0;
1164: }
1165: $result.= '<div class="LC_Box">'."\n"
1166: .'<h3 class="LC_hcell">'.$currentcategory.'</h3>'."\n";
1167: $count++;
1168: }
1169: $result .=
1170: '<label><input type="radio" name="template" value="'.$file->[0].'" />'.
1171: $file->[1].'</label>';
1172: if ($file->[3]) {
1173: $result.=&Apache::loncommon::help_open_topic($file->[3]);
1174: }
1175: # Provide example link
1176: my $filename=$file->[0];
1177: $filename=~s{^\Q$londocroot\E}{};
1178: if (!(grep $filename =~ $_, @noexamplelink)) {
1179: $result .= ' <span class="LC_fontsize_small">'
1180: .&Apache::loncommon::modal_link(
1181: $filename.'?inhibitmenu=yes',&mt('Example'),600,420,'sample')
1182: .'</span>';
1183: };
1184: $result .= '<br />'."\n";
1185: $count ++;
1186: }
1187: if ($numfiles > 0) {
1188: $result .= '</div></div>'."\n".'<div class="LC_clear_float_footer"></div>'."\n";
1189: }
1190: return $result;
1191: }
1192:
1193: sub newproblem {
1194: my ($request) = @_;
1195:
1196: if ($env{'form.template'}) {
1197: my $file = $env{'form.template'};
1198: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1199: &File::Copy::copy($file,$dest);
1200: &renderpage($request,$dest);
1201: return;
1202: }
1203:
1204: my ($extension) = ($request->uri =~ m/\.(\w+)$/);
1205: &Apache::lonxml::debug("Looking for :$extension:");
1206: my $templatelist=&get_template_list($extension);
1207: if ($env{'form.newfile'} && !$templatelist) {
1208: # no templates found
1209: my $templatefilename =
1210: $request->dir_config('lonIncludes').'/templates/blank.'.$extension;
1211: &Apache::lonxml::debug("$templatefilename");
1212: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1213: &File::Copy::copy($templatefilename,$dest);
1214: &renderpage($request,$dest);
1215: } else {
1216: my $url=&HTML::Entities::encode($request->uri,'<>&"');
1217: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1218: my $errormsg;
1219: my $instructions;
1220: my $brcrum = [{'href' => &Apache::loncommon::authorspace($request->uri),
1221: 'text' => 'Authoring Space'},
1222: {'href' => '',
1223: 'text' => "Create New $extension"}];
1224: my $start_page =
1225: &Apache::loncommon::start_page("Create New $extension",
1226: undef,
1227: {'bread_crumbs' => $brcrum,});
1228: $request->print(
1229: $start_page
1230: .&Apache::loncommon::head_subbox(
1231: &Apache::loncommon::CSTR_pageheader())
1232: .'<h1>'.&mt("Creating a new $extension resource.")."</h1>
1233: $errormsg
1234: ".&mt("The requested file [_1] currently does not exist.",
1235: '<span class="LC_filename">'.$url.'</span>').'
1236: <p class="LC_info">
1237: '.&mt("To create a new $extension, select a template from the".
1238: " list below. Then click on the \"Create $extension\" button.").'
1239: </p><div><form action="'.$url.'" method="post">');
1240:
1241: if (defined($templatelist)) {
1242: $request->print($templatelist);
1243: }
1244: $request->print('<br /><input type="submit" name="newfile" value="'.
1245: &mt("Create $extension").'" />');
1246: $request->print('</form></div>'.&Apache::loncommon::end_page());
1247: }
1248: return;
1249: }
1250:
1251: sub update_construct_style {
1252: if ($env{'request.state'} eq "construct"
1253: && $env{'form.problemmode'} eq 'view'
1254: && defined($env{'form.submitted'})
1255: && !defined($env{'form.resetdata'})
1256: && !defined($env{'form.newrandomization'})) {
1257: if ((!$env{'form.style_file'} && $env{'construct.style'})
1258: ||$env{'form.clear_style_file'}) {
1259: &Apache::lonnet::delenv('construct.style');
1260: } elsif ($env{'form.style_file'}
1261: && $env{'construct.style'} ne $env{'form.style_file'}) {
1262: &Apache::lonnet::appenv({'construct.style' =>
1263: $env{'form.style_file'}});
1264: }
1265: }
1266: }
1267:
1268:
1269: sub handler {
1270: #my $t0 = [&gettimeofday()];
1271: my $request=$_[0];
1272: $Apache::lonxml::request=$request;
1273: $Apache::lonxml::debug=$env{'user.debug'};
1274: $env{'request.uri'}=$request->uri;
1275: &setuppermissions();
1276:
1277: my $file=&Apache::lonnet::filelocation("",$request->uri);
1278:
1279: #check if we know where we are
1280: if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) {
1281: # if we are browsing we might not be able to know where we are
1282: if ($Apache::lonhomework::browse ne 'F' &&
1283: $env{'request.state'} ne "construct") {
1284: #should know where we are, so ask
1285: &unset_permissions();
1286: $request->internal_redirect('/adm/ambiguous');
1287: return OK;
1288: }
1289: }
1290: if (&setupheader($request)) {
1291: &unset_permissions();
1292: return OK;
1293: }
1294: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:$Apache::lonhomework::modifygrades:$Apache::lonhomework::queuegrade");
1295: &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
1296: my ($symb) = &Apache::lonnet::whichuser();
1297: &Apache::lonxml::debug('symb is '.$symb);
1298: if ($env{'request.state'} eq "construct") {
1299: if ( -e $file ) {
1300: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1301: ['problemmode']);
1302: if (!(defined $env{'form.problemmode'})) {
1303: #first visit to problem in construction space
1304: $env{'form.problemmode'}= 'view';
1305: &renderpage($request,$file);
1306: } elsif (($env{'form.problemmode'} eq 'editxml') ||
1307: ($env{'form.problemmode'} eq 'saveeditxml') ||
1308: ($env{'form.problemmode'} eq 'saveviewxml') ||
1309: ($env{'form.problemmode'} eq 'undoxml')) {
1310: &editxmlmode($request,$file);
1311: } elsif ($env{'form.problemmode'} eq 'calcanswers') {
1312: &analyze($request,$file);
1313: } else {
1314: &update_construct_style();
1315: &renderpage($request,$file);
1316: }
1317: } else {
1318: # requested file doesn't exist in contruction space
1319: &newproblem($request);
1320: }
1321: } else {
1322: # just render the page normally outside of construction space
1323: &Apache::lonxml::debug("not construct");
1324: &renderpage($request,$file);
1325: }
1326: #my $td=&tv_interval($t0);
1327: #&Apache::lonxml::debug("Spent $td seconds processing");
1328: # always turn off debug messages
1329: $Apache::lonxml::debug=0;
1330: &unset_permissions();
1331: return OK;
1332:
1333: }
1334:
1335: 1;
1336: __END__
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