Annotation of loncom/homework/lonhomework.pm, revision 1.79
1.63 albertel 1: # The LearningOnline Network with CAPA
1.52 albertel 2: # The LON-CAPA Homework handler
1.63 albertel 3: #
1.78 albertel 4: # $Id: lonhomework.pm,v 1.77 2002/04/11 16:02:32 albertel Exp $
1.63 albertel 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: #
1.52 albertel 28: # Guy Albertelli
1.17 www 29: # 11/30 Gerd Kortemeyer
1.56 www 30: # 6/1,8/17,8/18 Gerd Kortemeyer
1.1 albertel 31:
32: package Apache::lonhomework;
33: use strict;
1.73 albertel 34: use Apache::style();
35: use Apache::lonxml();
36: use Apache::lonnet();
37: use Apache::lonplot();
38: use Apache::inputtags();
39: use Apache::structuretags();
40: use Apache::randomlabel();
41: use Apache::response();
42: use Apache::hint();
43: use Apache::outputtags();
1.26 www 44: use Apache::Constants qw(:common);
1.73 albertel 45: use HTML::Entities();
1.47 albertel 46: #use Time::HiRes qw( gettimeofday tv_interval );
1.43 albertel 47:
1.69 harris41 48: BEGIN {
1.43 albertel 49: &Apache::lonxml::register_insert();
50: }
51:
1.5 albertel 52: sub get_target {
1.52 albertel 53: if ( $ENV{'request.state'} eq "published") {
1.66 albertel 54: if ( defined($ENV{'form.grade_target'})
55: && ($Apache::lonhomework::viewgrades == 'F' )) {
56: return ($ENV{'form.grade_target'});
57: }
1.62 albertel 58: if ( defined($ENV{'form.submitted'})) {
1.52 albertel 59: return ('grade', 'web');
60: } else {
61: return ('web');
62: }
63: } elsif ($ENV{'request.state'} eq "construct") {
1.74 albertel 64: if ( defined($ENV{'form.grade_target'}) ) {
65: return ($ENV{'form.grade_target'});
66: }
1.62 albertel 67: if ( defined($ENV{'form.preview'})) {
68: if ( defined($ENV{'form.submitted'})) {
1.52 albertel 69: return ('grade', 'web');
70: } else {
71: return ('web');
72: }
73: } else {
74: if ( $ENV{'form.problemmode'} eq 'View' ) {
1.62 albertel 75: if ( defined($ENV{'form.submitted'}) &&
76: (!defined($ENV{'form.resetdata'})) ) {
1.60 albertel 77: return ('grade', 'web','answer');
1.42 albertel 78: } else {
1.60 albertel 79: return ('web','answer');
1.42 albertel 80: }
1.52 albertel 81: } elsif ( $ENV{'form.problemmode'} eq 'Edit' ) {
82: if ( $ENV{'form.submitted'} eq 'edit' ) {
83: return ('modified','edit');
1.42 albertel 84: } else {
1.52 albertel 85: return ('edit');
1.42 albertel 86: }
1.52 albertel 87: } else {
88: return ('web');
89: }
1.15 albertel 90: }
1.52 albertel 91: }
92: return ();
1.5 albertel 93: }
94:
1.3 albertel 95: sub setup_vars {
1.52 albertel 96: my ($target) = @_;
97: return ';'
1.11 albertel 98: # return ';$external::target='.$target.';';
1.2 albertel 99: }
100:
101: sub send_header {
1.52 albertel 102: my ($request)= @_;
103: $request->print(&Apache::lontexconvert::header());
1.16 albertel 104: # $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
1.2 albertel 105: }
106:
1.36 albertel 107: sub createmenu {
1.52 albertel 108: my ($which,$request)=@_;
109: if ($which eq 'grade') {
110: $request->print('<script language="JavaScript">
111: hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
112: "height=350,width=150,menubar=no");
113: </script>');
114: }
1.36 albertel 115: }
116:
1.2 albertel 117: sub send_footer {
1.52 albertel 118: my ($request)= @_;
1.16 albertel 119: # $request->print('</form>');
1.52 albertel 120: $request->print(&Apache::lontexconvert::footer());
1.2 albertel 121: }
122:
1.52 albertel 123: $Apache::lonxml::browse='';
1.53 www 124:
125: sub check_access {
1.52 albertel 126: my ($id) = @_;
127: my $date ='';
128: my $status = '';
129: my $datemsg = '';
130: my $lastdate = '';
131: my $temp;
132: my $type;
133: my $passed;
134: &Apache::lonxml::debug("checking for part :$id:");
1.73 albertel 135: &Apache::lonxml::debug("time:".time);
1.52 albertel 136: foreach $temp ("opendate","duedate","answerdate") {
137: $lastdate = $date;
138: $date = &Apache::lonnet::EXT("resource.$id.$temp");
139: &Apache::lonxml::debug("found :$date: for :$temp:");
140: if ($date eq '') {
141: $date = "an unknown date"; $passed = 0;
142: } elsif ($date eq 'con_lost') {
143: $date = "an indeterminate date"; $passed = 0;
144: } else {
145: if (time < $date) { $passed = 0; } else { $passed = 1; }
146: $date = localtime $date;
1.51 harris41 147: }
1.52 albertel 148: if (!$passed) { $type=$temp; last; }
149: }
150: &Apache::lonxml::debug("have :$type:$passed:");
151: if ($passed) {
152: $status='SHOW_ANSWER';
153: $datemsg=$date;
154: } elsif ($type eq 'opendate') {
155: $status='CLOSED';
156: $datemsg = "will open on $date";
157: } elsif ($type eq 'duedate') {
158: $status='CAN_ANSWER';
159: $datemsg = "is due at $date";
160: } elsif ($type eq 'answerdate') {
161: $status='CLOSED';
162: $datemsg = "was due on $lastdate, and answers will be available on $date";
163: }
164: if ($status eq 'CAN_ANSWER') {
165: #check #tries
166: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
167: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
168: if ( $tries eq '' ) { $tries = '0'; }
169: if ( $maxtries eq '' ) { $maxtries = '2'; }
170: if ($tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
171: }
1.54 www 172:
1.56 www 173: if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
174: (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
1.54 www 175: return ('UNCHECKEDOUT','needs to be checked out');
176: }
177:
178:
1.52 albertel 179: &Apache::lonxml::debug("sending back :$status:$datemsg:");
180: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
181: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
182: $status='CAN_ANSWER';
183: $datemsg='is closed but you are allowed to view it';
184: }
185: if ($ENV{'request.state'} eq "construct") {
186: &Apache::lonxml::debug("in construction ignoring dates");
187: $status='CAN_ANSWER';
188: $datemsg='is in under construction';
189: }
190: return ($status,$datemsg);
1.20 albertel 191: }
192:
1.41 albertel 193: sub showhash {
1.52 albertel 194: my (%hash) = @_;
1.79 ! albertel 195: &showhashsubset(\%hash,'');
! 196: return '';
! 197: }
! 198:
! 199: sub showhashsubset {
! 200: my ($hash,$keyre) = @_;
1.52 albertel 201: my $resultkey;
1.79 ! albertel 202: foreach $resultkey (sort keys %$hash) {
! 203: if ($resultkey =~ /$keyre/) {
! 204: if (ref($$hash{$resultkey})) {
! 205: if ($$hash{$resultkey} =~ /ARRAY/ ) {
! 206: my $string="$resultkey ---- (";
! 207: foreach my $elm (@{ $$hash{$resultkey} }) {
! 208: $string.="$elm,";
! 209: }
! 210: chop($string);
! 211: &Apache::lonxml::debug("$string)");
! 212: } else {
! 213: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
1.73 albertel 214: }
215: } else {
1.79 ! albertel 216: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
1.73 albertel 217: }
218: }
1.52 albertel 219: }
220: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
221: return '';
1.41 albertel 222: }
223:
224: sub setuppermissions {
1.52 albertel 225: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
226: $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
227: return ''
1.41 albertel 228: }
229:
230: sub setupheader {
1.52 albertel 231: my $request=$_[0];
232: if ($ENV{'browser.mathml'}) {
233: $request->content_type('text/xml');
234: } else {
235: $request->content_type('text/html');
236: }
1.68 albertel 237: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
238: &Apache::loncommon::no_cache($request);
239: }
1.52 albertel 240: $request->send_http_header;
241: return OK if $request->header_only;
242: return ''
1.41 albertel 243: }
1.35 albertel 244:
1.47 albertel 245: sub handle_save_or_undo {
1.52 albertel 246: my ($request,$problem,$result) = @_;
1.70 albertel 247: my $file = &Apache::lonnet::filelocation("",$request->uri);
248: my $filebak =$file.".bak";
249: my $filetmp =$file.".tmp";
1.64 albertel 250: my $error=0;
1.52 albertel 251:
252: if ($ENV{'form.Undo'} eq 'undo') {
1.70 albertel 253: my $error=0;
254: if (!copy($file,$filetmp)) { $error=1; }
255: if ((!$error) && (!copy($filebak,$file))) { $error=1; }
256: if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
257: if (!$error) {
258: $request->print("<p><b>Undid changes, Switched $filebak and $file</b></p>");
1.52 albertel 259: } else {
1.70 albertel 260: $request->print("<p><font color=\"red\" size=\"+1\"><b>Unable to undo, unable to switch $filebak and $file</b></font></p>");
1.64 albertel 261: $error=1;
1.52 albertel 262: }
263: } else {
1.70 albertel 264: my $fs=Apache::File->new(">$filebak");
1.52 albertel 265: if (defined($fs)) {
266: print $fs $$problem;
1.70 albertel 267: $request->print("<b>Making Backup to $filebak</b><br />");
1.52 albertel 268: } else {
1.70 albertel 269: $request->print("<font color=\"red\" size=\"+1\"><b>Unable to make backup $filebak</b></font>");
1.64 albertel 270: $error=2;
1.52 albertel 271: }
1.70 albertel 272: my $fh=Apache::File->new(">$file");
1.52 albertel 273: if (defined($fh)) {
274: print $fh $$result;
1.70 albertel 275: $request->print("<b>Saving Modifications to $file</b><br />");
1.47 albertel 276: } else {
1.70 albertel 277: $request->print("<font color=\"red\" size=\"+1\"><b>Unable to write to $file</b></font>");
1.64 albertel 278: $error|=4;
1.47 albertel 279: }
1.52 albertel 280: }
1.64 albertel 281: return $error;
282: }
283:
1.74 albertel 284: sub analyze {
285: my ($request,$file) = @_;
286: &Apache::lonxml::debug("Analyze");
287: my $result=&Apache::lonnet::ssi($request->uri,('grade_target' => 'analyze'));
288: &Apache::lonxml::debug(":$result:");
289: (my $garbage,$result)=split(/_HASH_REF__/,$result,2);
290: &showhash(&Apache::lonnet::str2hash($result));
291: return $result;
292: }
293:
1.64 albertel 294: sub editxmlmode {
295: my ($request,$file) = @_;
296: my $result;
297: my $problem=&Apache::lonnet::getfile($file);
298: if ($problem == -1) {
299: &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
300: $problem='';
301: }
302: if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) {
303: my $error=&handle_save_or_undo($request,\$problem,
304: \$ENV{'form.editxmltext'});
305: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
306: }
307: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
308: if ($cols > 80) { $cols = 80; }
309: $result.='<html><body bgcolor="#FFFFFF">
310: <form name="lonhomework" method="POST" action="'.
311: $ENV{'request.uri'}.'">
312: <input type="hidden" name="problemmode" value="EditXML" />
313: <input type="submit" name="problemmode" value="View" />
314: <input type="submit" name="problemmode" value="Edit" />
315: <hr />
316: <input type="submit" name="submit" value="Submit Changes" />
317: <input type="submit" name="Undo" value="undo" />
318: <hr />
319: <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
1.73 albertel 320: &HTML::Entities::encode($problem).'</textarea>
1.64 albertel 321: </form></body></html>';
322: $request->print($result);
323: return '';
1.47 albertel 324: }
325:
1.41 albertel 326: sub renderpage {
1.52 albertel 327: my ($request,$file) = @_;
328:
329: my (@targets) = &get_target();
1.70 albertel 330: &Apache::lonxml::debug("Running targets ".join(':',@targets));
1.52 albertel 331: foreach my $target (@targets) {
332: #my $t0 = [&gettimeofday()];
333: my $problem=&Apache::lonnet::getfile($file);
334: if ($problem == -1) {
335: &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
336: $problem='';
337: }
338:
339: my %mystyle;
340: my $result = '';
341: &Apache::inputtags::initialize_inputtags;
342: &Apache::edit::initialize_edit;
1.74 albertel 343: if ($target eq 'analyze') { %Apache::lonhomework::anaylze=(); }
1.52 albertel 344: if ($target eq 'web') {
1.76 albertel 345: my ($symb)=&Apache::lonxml::whichuser();
346: if ($symb eq '') {
1.52 albertel 347: if ($ENV{'request.state'} eq "construct") {
1.36 albertel 348: } else {
1.52 albertel 349: $request->print("Browsing or <a href=\"/adm/ambiguous\">ambiguous</a> reference, submissions ignored<br />");
1.51 harris41 350: }
1.52 albertel 351: }
352: #if ($Apache::lonhomework::viewgrades eq 'F') {&createmenu('grade',$request); }
353: }
1.64 albertel 354: #if ($target eq 'grade') { &showhash(%Apache::lonhomework::history); }
1.79 ! albertel 355: #if ($target eq 'web') { &showhash(%ENV); }
1.52 albertel 356:
357: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
358: if ($default == -1) {
359: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
360: $default='';
361: }
1.70 albertel 362: &Apache::lonxml::debug("Should be parsing now");
1.78 albertel 363: $result = &Apache::lonxml::xmlparse($request, $target, $problem,
1.52 albertel 364: $default.&setup_vars($target),%mystyle);
365:
366: #$request->print("Result follows:");
367: if ($target eq 'modified') {
368: &handle_save_or_undo($request,\$problem,\$result);
369: } else {
1.74 albertel 370: if ($target eq 'analyze') {
371: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
1.75 albertel 372: undef(%Apache::lonhomework::analyze);
1.74 albertel 373: }
1.52 albertel 374: #my $td=&tv_interval($t0);
375: #if ( $Apache::lonxml::debug) {
376: #$result =~ s:</body>::;
377: #$result.="<br />Spent $td seconds processing target $target\n</body>";
378: #}
379: $request->print($result);
380: }
381: #$request->print(":Result ends");
382: #my $td=&tv_interval($t0);
383: }
1.41 albertel 384: }
385:
1.42 albertel 386: # with no arg it returns a HTML <option> list of the template titles
387: # with one arg it returns the filename associated with the arg passed
388: sub get_template_list {
1.52 albertel 389: my ($namewanted,$extension) = @_;
390: my $result;
391: &Apache::lonxml::debug("Looking for :$extension:");
392: foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
393: my $name=&Apache::lonnet::metadata($file,'title');
394: if ($namewanted && ($name eq $namewanted)) {
395: $result=$file;
396: last;
397: } else {
398: $result.="<option>$name</option>";
1.42 albertel 399: }
1.52 albertel 400: }
401: return $result;
1.42 albertel 402: }
403:
404: sub newproblem {
1.65 matthew 405: my ($request) = @_;
406: my $extension=$request->uri;
407: $extension=~s:^.*\.([\w]+)$:$1:;
408: &Apache::lonxml::debug("Looking for :$extension:");
409: if ($ENV{'form.template'}) {
410: use File::Copy;
411: my $file = &get_template_list($ENV{'form.template'},$extension);
412: my $dest = &Apache::lonnet::filelocation("",$request->uri);
413: copy($file,$dest);
414: &renderpage($request,$dest);
415: } elsif($ENV{'form.newfile'}) {
416: # I don't like hard-coded filenames but for now, this will work.
417: use File::Copy;
418: my $templatefilename =
1.66 albertel 419: $request->dir_config('lonIncludes').'/templates/blank.problem';
420: &Apache::lonxml::debug("$templatefilename");
1.65 matthew 421: my $dest = &Apache::lonnet::filelocation("",$request->uri);
422: copy($templatefilename,$dest);
423: &renderpage($request,$dest);
424: }else {
425: my $templatelist=&get_template_list('',$extension);
426: my $url=$request->uri;
427: my $dest = &Apache::lonnet::filelocation("",$request->uri);
428: if (!defined($templatelist)) {
429: # We didn't find a template, so just create a blank problem.
430: $request->print(<<ENDNEWPROBLEM);
431: <body bgcolor="#FFFFFF">
432: The requested file $url doesn\'t exist. You can create a new $extension <br />
433: <form action="$url" method="POST">
434: <input type="submit" name="newfile" value="New $extension"><br />
435: </form>
436: </body>
437: ENDNEWPROBLEM
438: return '';
439: }
440: $request->print(<<ENDNEWPROBLEM);
1.42 albertel 441: <body bgcolor="#FFFFFF">
1.65 matthew 442: The requested file $url doesn\'t exist. You can create a new $extension <br />
1.42 albertel 443: <form action="$url" method="POST">
1.50 albertel 444: <input type="submit" value="New $extension"><br />
1.42 albertel 445: <select name="template">
446: $templatelist
447: </select>
448: </form>
449: </body>
450: ENDNEWPROBLEM
1.65 matthew 451: }
452: return '';
1.42 albertel 453: }
454:
455: sub view_or_edit_menu {
1.52 albertel 456: my ($request) = @_;
457: my $url=$request->uri;
458: $request->print(<<EDITMENU);
1.42 albertel 459: <body bgcolor="#FFFFFF">
460: <form action="$url" method="POST">
461: Would you like to <input type="submit" name="problemmode" value="View"> or
462: <input type="submit" name="problemmode" value="Edit"> the problem.
463: </form>
464: </body>
465: EDITMENU
466: }
467:
1.41 albertel 468: sub handler {
1.52 albertel 469: #my $t0 = [&gettimeofday()];
470: my $request=$_[0];
1.41 albertel 471:
1.52 albertel 472: if ( $ENV{'user.name'} eq 'albertel' ) {$Apache::lonxml::debug=1;}
1.41 albertel 473:
474: if (&setupheader($request)) { return OK; }
1.52 albertel 475: $ENV{'request.uri'}=$request->uri;
1.41 albertel 476:
477: #setup permissions
1.52 albertel 478: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
479: $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
480: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
1.71 albertel 481: # some times multiple problemmodes are submitted, need to select
482: # the last one
1.72 albertel 483: if ( defined($ENV{'form.problemmode'}) &&
1.77 albertel 484: ref($ENV{'form.problemmode'}) ) {
1.72 albertel 485: my $mode=$ENV{'form.problemmode'}->[-1];
1.71 albertel 486: undef $ENV{'form.problemmode'};
1.72 albertel 487: $ENV{'form.problemmode'}=$mode;
1.71 albertel 488: }
1.64 albertel 489: &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
1.52 albertel 490: my $file=&Apache::lonnet::filelocation("",$request->uri);
491:
492: #check if we know where we are
493: if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) {
494: # if we are browsing we might not be able to know where we are
495: if ($Apache::lonhomework::browse ne 'F') {
496: #should know where we are, so ask
497: $request->internal_redirect('/adm/ambiguous'); return;
1.41 albertel 498: }
1.52 albertel 499: }
1.41 albertel 500:
1.52 albertel 501: if ($ENV{'request.state'} eq "construct") {
1.62 albertel 502: if ($ENV{'form.resetdata'} eq 'Reset Submissions') {
503: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
504: &Apache::lonnet::tmpreset($symb,'',$domain,$name);
505: }
1.52 albertel 506: if ( -e $file ) {
507: if (!(defined $ENV{'form.problemmode'})) {
508: #first visit to problem in construction space
1.64 albertel 509: #&view_or_edit_menu($request);
510: $ENV{'form.problemmode'}='View';
511: &renderpage($request,$file);
512: } elsif ($ENV{'form.problemmode'} eq 'EditXML') {
513: &editxmlmode($request,$file);
1.74 albertel 514: } elsif ($ENV{'form.problemmode'} eq 'Answer Distribution') {
515: &analyze($request,$file);
1.52 albertel 516: } else {
517: &renderpage($request,$file);
1.41 albertel 518: }
519: } else {
1.52 albertel 520: # requested file doesn't exist in contruction space
521: &newproblem($request);
1.41 albertel 522: }
1.52 albertel 523: } else {
524: # just render the page normally outside of construction space
1.74 albertel 525: &Apache::lonxml::debug("not construct");
1.52 albertel 526: &renderpage($request,$file);
527: }
528: #my $td=&tv_interval($t0);
529: #&Apache::lonxml::debug("Spent $td seconds processing");
530: # &Apache::lonhomework::send_footer($request);
531: # always turn off debug messages
532: $Apache::lonxml::debug=0;
533: return OK;
534:
1.1 albertel 535: }
536:
537: 1;
538: __END__
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