Annotation of loncom/homework/lonhomework.pm, revision 1.105
1.63 albertel 1: # The LearningOnline Network with CAPA
1.52 albertel 2: # The LON-CAPA Homework handler
1.63 albertel 3: #
1.105 ! www 4: # $Id: lonhomework.pm,v 1.104 2002/12/11 14:44:24 www 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
1.82 bowersj2 31: # 7/18 Jeremy Bowers
1.1 albertel 32:
33: package Apache::lonhomework;
34: use strict;
1.73 albertel 35: use Apache::style();
36: use Apache::lonxml();
37: use Apache::lonnet();
38: use Apache::lonplot();
39: use Apache::inputtags();
40: use Apache::structuretags();
41: use Apache::randomlabel();
42: use Apache::response();
43: use Apache::hint();
44: use Apache::outputtags();
1.83 albertel 45: use Apache::caparesponse();
46: use Apache::radiobuttonresponse();
47: use Apache::optionresponse();
48: use Apache::imageresponse();
49: use Apache::essayresponse();
50: use Apache::externalresponse();
1.26 www 51: use Apache::Constants qw(:common);
1.73 albertel 52: use HTML::Entities();
1.83 albertel 53: use Apache::loncommon();
1.47 albertel 54: #use Time::HiRes qw( gettimeofday tv_interval );
1.43 albertel 55:
1.69 harris41 56: BEGIN {
1.43 albertel 57: &Apache::lonxml::register_insert();
58: }
59:
1.5 albertel 60: sub get_target {
1.52 albertel 61: if ( $ENV{'request.state'} eq "published") {
1.90 sakharuk 62: if ( defined($ENV{'form.grade_target'} )
63: && ($ENV{'form.grade_target'} eq 'tex')) {
64: return ($ENV{'form.grade_target'});
65: } elsif ( defined($ENV{'form.grade_target'} )
1.66 albertel 66: && ($Apache::lonhomework::viewgrades == 'F' )) {
67: return ($ENV{'form.grade_target'});
68: }
1.90 sakharuk 69:
1.62 albertel 70: if ( defined($ENV{'form.submitted'})) {
1.52 albertel 71: return ('grade', 'web');
72: } else {
73: return ('web');
74: }
75: } elsif ($ENV{'request.state'} eq "construct") {
1.74 albertel 76: if ( defined($ENV{'form.grade_target'}) ) {
77: return ($ENV{'form.grade_target'});
78: }
1.62 albertel 79: if ( defined($ENV{'form.preview'})) {
80: if ( defined($ENV{'form.submitted'})) {
1.52 albertel 81: return ('grade', 'web');
82: } else {
83: return ('web');
84: }
85: } else {
1.88 albertel 86: if ( $ENV{'form.problemmode'} eq 'View' ||
87: $ENV{'form.problemmode'} eq 'Discard Edits and View') {
1.62 albertel 88: if ( defined($ENV{'form.submitted'}) &&
89: (!defined($ENV{'form.resetdata'})) ) {
1.60 albertel 90: return ('grade', 'web','answer');
1.42 albertel 91: } else {
1.60 albertel 92: return ('web','answer');
1.42 albertel 93: }
1.52 albertel 94: } elsif ( $ENV{'form.problemmode'} eq 'Edit' ) {
95: if ( $ENV{'form.submitted'} eq 'edit' ) {
1.80 albertel 96: if ( $ENV{'form.submit'} eq 'Submit Changes and View' ) {
1.81 albertel 97: return ('modified','web','answer');
1.80 albertel 98: } else {
99: return ('modified','edit');
100: }
1.42 albertel 101: } else {
1.52 albertel 102: return ('edit');
1.42 albertel 103: }
1.52 albertel 104: } else {
105: return ('web');
106: }
1.15 albertel 107: }
1.52 albertel 108: }
109: return ();
1.5 albertel 110: }
111:
1.3 albertel 112: sub setup_vars {
1.52 albertel 113: my ($target) = @_;
114: return ';'
1.11 albertel 115: # return ';$external::target='.$target.';';
1.2 albertel 116: }
117:
118: sub send_header {
1.52 albertel 119: my ($request)= @_;
120: $request->print(&Apache::lontexconvert::header());
1.16 albertel 121: # $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
1.2 albertel 122: }
123:
1.36 albertel 124: sub createmenu {
1.52 albertel 125: my ($which,$request)=@_;
126: if ($which eq 'grade') {
127: $request->print('<script language="JavaScript">
1.91 albertel 128: hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
1.52 albertel 129: "height=350,width=150,menubar=no");
130: </script>');
131: }
1.36 albertel 132: }
133:
1.2 albertel 134: sub send_footer {
1.52 albertel 135: my ($request)= @_;
1.16 albertel 136: # $request->print('</form>');
1.52 albertel 137: $request->print(&Apache::lontexconvert::footer());
1.2 albertel 138: }
139:
1.52 albertel 140: $Apache::lonxml::browse='';
1.53 www 141:
1.92 bowersj2 142: # JB, 9/24/2002: Any changes in this function may require a change
143: # in lonnavmaps::resource::getDateStatus.
1.53 www 144: sub check_access {
1.52 albertel 145: my ($id) = @_;
146: my $date ='';
1.103 albertel 147: my $status;
1.52 albertel 148: my $datemsg = '';
149: my $lastdate = '';
150: my $temp;
151: my $type;
152: my $passed;
153: &Apache::lonxml::debug("checking for part :$id:");
1.73 albertel 154: &Apache::lonxml::debug("time:".time);
1.52 albertel 155: foreach $temp ("opendate","duedate","answerdate") {
156: $lastdate = $date;
157: $date = &Apache::lonnet::EXT("resource.$id.$temp");
1.87 www 158: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
1.103 albertel 159: if ($thistype =~ /^(con_lost|no_such_host)/ ||
160: $date =~ /^(con_lost|no_such_host)/) {
161: $status='UNAVAILABLE';
162: $date="may open later.";
163: return($status,$date);
164: }
1.87 www 165: if ($thistype eq 'date_interval') {
166: if ($temp eq 'opendate') {
167: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
168: }
169: if ($temp eq 'answerdate') {
170: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
171: }
172: }
1.52 albertel 173: &Apache::lonxml::debug("found :$date: for :$temp:");
174: if ($date eq '') {
175: $date = "an unknown date"; $passed = 0;
176: } elsif ($date eq 'con_lost') {
177: $date = "an indeterminate date"; $passed = 0;
178: } else {
179: if (time < $date) { $passed = 0; } else { $passed = 1; }
180: $date = localtime $date;
1.51 harris41 181: }
1.52 albertel 182: if (!$passed) { $type=$temp; last; }
183: }
184: &Apache::lonxml::debug("have :$type:$passed:");
185: if ($passed) {
186: $status='SHOW_ANSWER';
187: $datemsg=$date;
188: } elsif ($type eq 'opendate') {
189: $status='CLOSED';
190: $datemsg = "will open on $date";
191: } elsif ($type eq 'duedate') {
192: $status='CAN_ANSWER';
193: $datemsg = "is due at $date";
194: } elsif ($type eq 'answerdate') {
195: $status='CLOSED';
196: $datemsg = "was due on $lastdate, and answers will be available on $date";
197: }
198: if ($status eq 'CAN_ANSWER') {
199: #check #tries
200: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
201: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
202: if ( $tries eq '' ) { $tries = '0'; }
203: if ( $maxtries eq '' ) { $maxtries = '2'; }
204: if ($tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
205: }
1.54 www 206:
1.56 www 207: if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
208: (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
1.54 www 209: return ('UNCHECKEDOUT','needs to be checked out');
210: }
211:
212:
1.52 albertel 213: &Apache::lonxml::debug("sending back :$status:$datemsg:");
214: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
1.91 albertel 215: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
1.52 albertel 216: $status='CAN_ANSWER';
217: $datemsg='is closed but you are allowed to view it';
218: }
219: if ($ENV{'request.state'} eq "construct") {
220: &Apache::lonxml::debug("in construction ignoring dates");
221: $status='CAN_ANSWER';
222: $datemsg='is in under construction';
223: }
224: return ($status,$datemsg);
1.20 albertel 225: }
226:
1.41 albertel 227: sub showhash {
1.52 albertel 228: my (%hash) = @_;
1.99 albertel 229: &showhashsubset(\%hash,'.');
1.79 albertel 230: return '';
231: }
232:
233: sub showhashsubset {
234: my ($hash,$keyre) = @_;
1.52 albertel 235: my $resultkey;
1.79 albertel 236: foreach $resultkey (sort keys %$hash) {
237: if ($resultkey =~ /$keyre/) {
238: if (ref($$hash{$resultkey})) {
239: if ($$hash{$resultkey} =~ /ARRAY/ ) {
240: my $string="$resultkey ---- (";
241: foreach my $elm (@{ $$hash{$resultkey} }) {
242: $string.="$elm,";
243: }
244: chop($string);
245: &Apache::lonxml::debug("$string)");
246: } else {
247: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
1.73 albertel 248: }
249: } else {
1.79 albertel 250: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
1.73 albertel 251: }
252: }
1.52 albertel 253: }
254: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
255: return '';
1.41 albertel 256: }
257:
258: sub setuppermissions {
1.52 albertel 259: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
260: $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
261: return ''
1.41 albertel 262: }
263:
264: sub setupheader {
1.52 albertel 265: my $request=$_[0];
266: if ($ENV{'browser.mathml'}) {
267: $request->content_type('text/xml');
268: } else {
269: $request->content_type('text/html');
270: }
1.68 albertel 271: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
272: &Apache::loncommon::no_cache($request);
273: }
1.52 albertel 274: $request->send_http_header;
275: return OK if $request->header_only;
276: return ''
1.41 albertel 277: }
1.35 albertel 278:
1.47 albertel 279: sub handle_save_or_undo {
1.52 albertel 280: my ($request,$problem,$result) = @_;
1.70 albertel 281: my $file = &Apache::lonnet::filelocation("",$request->uri);
282: my $filebak =$file.".bak";
283: my $filetmp =$file.".tmp";
1.64 albertel 284: my $error=0;
1.52 albertel 285:
286: if ($ENV{'form.Undo'} eq 'undo') {
1.70 albertel 287: my $error=0;
288: if (!copy($file,$filetmp)) { $error=1; }
289: if ((!$error) && (!copy($filebak,$file))) { $error=1; }
290: if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
291: if (!$error) {
292: $request->print("<p><b>Undid changes, Switched $filebak and $file</b></p>");
1.52 albertel 293: } else {
1.70 albertel 294: $request->print("<p><font color=\"red\" size=\"+1\"><b>Unable to undo, unable to switch $filebak and $file</b></font></p>");
1.64 albertel 295: $error=1;
1.52 albertel 296: }
297: } else {
1.70 albertel 298: my $fs=Apache::File->new(">$filebak");
1.52 albertel 299: if (defined($fs)) {
300: print $fs $$problem;
1.70 albertel 301: $request->print("<b>Making Backup to $filebak</b><br />");
1.52 albertel 302: } else {
1.70 albertel 303: $request->print("<font color=\"red\" size=\"+1\"><b>Unable to make backup $filebak</b></font>");
1.64 albertel 304: $error=2;
1.52 albertel 305: }
1.70 albertel 306: my $fh=Apache::File->new(">$file");
1.52 albertel 307: if (defined($fh)) {
308: print $fh $$result;
1.70 albertel 309: $request->print("<b>Saving Modifications to $file</b><br />");
1.47 albertel 310: } else {
1.70 albertel 311: $request->print("<font color=\"red\" size=\"+1\"><b>Unable to write to $file</b></font>");
1.64 albertel 312: $error|=4;
1.47 albertel 313: }
1.52 albertel 314: }
1.64 albertel 315: return $error;
316: }
317:
1.101 albertel 318: sub analyze_header {
319: my ($request) = @_;
320: my $result.='<html><body bgcolor="#FFFFFF">
321: <form name="lonhomework" method="POST" action="'.
322: $ENV{'request.uri'}.'">
323: <input type="submit" name="problemmode" value="EditXML" />
324: <input type="submit" name="problemmode" value="Edit" />
325: <hr />
326: <input type="submit" name="submit" value="View" />
327: <hr />
328: List of possible answers:
329: </form>';
330: $request->print($result);
331: $request->rflush();
332: }
333:
1.74 albertel 334: sub analyze {
1.101 albertel 335: my ($request,$file) = @_;
336: &Apache::lonxml::debug("Analyze");
337: my $result;
338: my %overall;
339: my %allparts;
340: my $rndseed=$ENV{'form.rndseed'};
341: &analyze_header($request);
1.102 albertel 342: for(my $i=1;$i<$ENV{'form.numtoanalyze'}+1;$i++) {
1.101 albertel 343: my $subresult=&Apache::lonnet::ssi($request->uri,
344: ('grade_target' => 'analyze'),
1.102 albertel 345: ('rndseed' => $i));
346: &Apache::lonxml::debug(":$subresult:");
1.101 albertel 347: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
348: my %analyze=&Apache::lonnet::str2hash($subresult);
349: &Apache::lonhomework::showhash(%analyze);
350: my @parts = @{ $analyze{'parts'} };
351: foreach my $part (@parts) {
352: if (!exists($allparts{$part})) {$allparts{$part}=1;};
353: if ($analyze{$part.'.type'} eq 'numericalresponse') {
354: push( @{ $overall{$part.'.answer'} },
355: [@{ $analyze{$part.'.answer'} }]);
356: }
357: }
358: }
359: foreach my $part (keys(%allparts)) {
360: $request->print('<table><tr><td>Part '.$part.'</td></tr>');
361: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
362: $request->print('<tr><td>'.join('</td><td>',@{ $answer }).
363: '</td></tr>');
364: }
365: }
366: &Apache::lonhomework::showhash(%overall);
367: return $result;
1.74 albertel 368: }
369:
1.64 albertel 370: sub editxmlmode {
371: my ($request,$file) = @_;
372: my $result;
373: my $problem=&Apache::lonnet::getfile($file);
374: if ($problem == -1) {
375: &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
376: $problem='';
377: }
378: if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) {
379: my $error=&handle_save_or_undo($request,\$problem,
380: \$ENV{'form.editxmltext'});
381: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
382: }
1.80 albertel 383: &Apache::lonhomework::showhashsubset(\%ENV,'^form');
384: if ( $ENV{'form.submit'} eq 'Submit Changes and View' ) {
385: &Apache::lonhomework::showhashsubset(\%ENV,'^form');
386: $ENV{'form.problemmode'}='View';
387: &renderpage($request,$file);
388: } else {
389: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
1.82 bowersj2 390: my $xml_help = Apache::loncommon::help_open_topic("Problem_Editor_XML_Index");
1.80 albertel 391: if ($cols > 80) { $cols = 80; }
1.89 albertel 392: if ($cols < 70) { $cols = 70; }
393: if ($rows < 20) { $rows = 20; }
1.80 albertel 394: $result.='<html><body bgcolor="#FFFFFF">
1.64 albertel 395: <form name="lonhomework" method="POST" action="'.
396: $ENV{'request.uri'}.'">
397: <input type="hidden" name="problemmode" value="EditXML" />
1.80 albertel 398: <input type="submit" name="problemmode" value="Discard Edits and View" />
1.64 albertel 399: <input type="submit" name="problemmode" value="Edit" />
400: <hr />
401: <input type="submit" name="submit" value="Submit Changes" />
1.80 albertel 402: <input type="submit" name="submit" value="Submit Changes and View" />
1.64 albertel 403: <input type="submit" name="Undo" value="undo" />
404: <hr />
1.82 bowersj2 405: ' . $xml_help . ' Problem Help<br>
1.64 albertel 406: <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
1.73 albertel 407: &HTML::Entities::encode($problem).'</textarea>
1.64 albertel 408: </form></body></html>';
1.80 albertel 409: $request->print($result);
410: }
1.64 albertel 411: return '';
1.47 albertel 412: }
413:
1.41 albertel 414: sub renderpage {
1.52 albertel 415: my ($request,$file) = @_;
416:
417: my (@targets) = &get_target();
1.70 albertel 418: &Apache::lonxml::debug("Running targets ".join(':',@targets));
1.52 albertel 419: foreach my $target (@targets) {
420: #my $t0 = [&gettimeofday()];
421: my $problem=&Apache::lonnet::getfile($file);
422: if ($problem == -1) {
423: &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
424: $problem='';
425: }
426:
427: my %mystyle;
428: my $result = '';
1.97 albertel 429: &Apache::inputtags::initialize_inputtags();
430: &Apache::outputtags::initialize_outputtags();
431: &Apache::edit::initialize_edit();
1.74 albertel 432: if ($target eq 'analyze') { %Apache::lonhomework::anaylze=(); }
1.85 albertel 433: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
434: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%ENV,'^form');}
1.52 albertel 435:
1.70 albertel 436: &Apache::lonxml::debug("Should be parsing now");
1.78 albertel 437: $result = &Apache::lonxml::xmlparse($request, $target, $problem,
1.98 albertel 438: &setup_vars($target),%mystyle);
1.52 albertel 439:
440: #$request->print("Result follows:");
441: if ($target eq 'modified') {
442: &handle_save_or_undo($request,\$problem,\$result);
443: } else {
1.74 albertel 444: if ($target eq 'analyze') {
445: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
1.75 albertel 446: undef(%Apache::lonhomework::analyze);
1.74 albertel 447: }
1.52 albertel 448: #my $td=&tv_interval($t0);
449: #if ( $Apache::lonxml::debug) {
450: #$result =~ s:</body>::;
451: #$result.="<br />Spent $td seconds processing target $target\n</body>";
452: #}
453: $request->print($result);
454: }
455: #$request->print(":Result ends");
456: #my $td=&tv_interval($t0);
457: }
1.41 albertel 458: }
459:
1.42 albertel 460: # with no arg it returns a HTML <option> list of the template titles
461: # with one arg it returns the filename associated with the arg passed
462: sub get_template_list {
1.52 albertel 463: my ($namewanted,$extension) = @_;
464: my $result;
1.85 albertel 465: my @allnames;
1.52 albertel 466: &Apache::lonxml::debug("Looking for :$extension:");
1.91 albertel 467: foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
1.52 albertel 468: my $name=&Apache::lonnet::metadata($file,'title');
469: if ($namewanted && ($name eq $namewanted)) {
470: $result=$file;
471: last;
472: } else {
1.104 www 473: if ($name) { push (@allnames, $name); }
1.42 albertel 474: }
1.52 albertel 475: }
1.86 albertel 476: if (@allnames && !$result) {
1.85 albertel 477: $result="<option>Select a $extension type</option>\n<option>".
478: join('</option><option>',sort(@allnames)).'</option>';
479: }
1.52 albertel 480: return $result;
1.42 albertel 481: }
482:
483: sub newproblem {
1.65 matthew 484: my ($request) = @_;
485: my $extension=$request->uri;
486: $extension=~s:^.*\.([\w]+)$:$1:;
487: &Apache::lonxml::debug("Looking for :$extension:");
1.85 albertel 488: if ($ENV{'form.template'} &&
489: $ENV{'form.template'} ne "Select a $extension type") {
1.65 matthew 490: use File::Copy;
491: my $file = &get_template_list($ENV{'form.template'},$extension);
492: my $dest = &Apache::lonnet::filelocation("",$request->uri);
493: copy($file,$dest);
494: &renderpage($request,$dest);
495: } elsif($ENV{'form.newfile'}) {
496: # I don't like hard-coded filenames but for now, this will work.
497: use File::Copy;
498: my $templatefilename =
1.66 albertel 499: $request->dir_config('lonIncludes').'/templates/blank.problem';
500: &Apache::lonxml::debug("$templatefilename");
1.65 matthew 501: my $dest = &Apache::lonnet::filelocation("",$request->uri);
502: copy($templatefilename,$dest);
503: &renderpage($request,$dest);
1.85 albertel 504: } else {
1.65 matthew 505: my $templatelist=&get_template_list('',$extension);
506: my $url=$request->uri;
507: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1.85 albertel 508: my $instructions;
1.105 ! www 509: if ($templatelist) { $instructions=", select a template from the pull-down menu below.<br />Then";}
1.65 matthew 510: $request->print(<<ENDNEWPROBLEM);
1.42 albertel 511: <body bgcolor="#FFFFFF">
1.105 ! www 512: <h1>Creating a new $extension resource</h1>
! 513: The requested file <tt>$url</tt> currently does not exist.
! 514: <p>
! 515: To create a new $extension$instructions click on the "Create $extension" button.
! 516: </p>
! 517: <p><form action="$url" method="POST">
1.42 albertel 518: ENDNEWPROBLEM
1.85 albertel 519: if (defined($templatelist)) {
520: $request->print("<select name=\"template\">$templatelist</select>");
521: }
522: $request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"Create $extension\" />");
1.105 ! www 523: $request->print("</form></p></body>");
1.65 matthew 524: }
525: return '';
1.42 albertel 526: }
527:
528: sub view_or_edit_menu {
1.52 albertel 529: my ($request) = @_;
530: my $url=$request->uri;
531: $request->print(<<EDITMENU);
1.42 albertel 532: <body bgcolor="#FFFFFF">
533: <form action="$url" method="POST">
534: Would you like to <input type="submit" name="problemmode" value="View"> or
535: <input type="submit" name="problemmode" value="Edit"> the problem.
536: </form>
537: </body>
538: EDITMENU
539: }
540:
1.41 albertel 541: sub handler {
1.52 albertel 542: #my $t0 = [&gettimeofday()];
543: my $request=$_[0];
1.41 albertel 544:
1.95 albertel 545: # if ( $ENV{'user.name'} eq 'albertel' ) {$Apache::lonxml::debug=1;}
546: $Apache::lonxml::debug=$ENV{'user.debug'};
1.41 albertel 547:
548: if (&setupheader($request)) { return OK; }
1.52 albertel 549: $ENV{'request.uri'}=$request->uri;
1.41 albertel 550:
551: #setup permissions
1.52 albertel 552: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
553: $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
554: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
1.71 albertel 555: # some times multiple problemmodes are submitted, need to select
556: # the last one
1.80 albertel 557: &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
1.72 albertel 558: if ( defined($ENV{'form.problemmode'}) &&
1.77 albertel 559: ref($ENV{'form.problemmode'}) ) {
1.80 albertel 560: &Apache::lonxml::debug("Problem Mode ".join(",",@$ENV{'form.problemmode'}));
1.72 albertel 561: my $mode=$ENV{'form.problemmode'}->[-1];
1.71 albertel 562: undef $ENV{'form.problemmode'};
1.72 albertel 563: $ENV{'form.problemmode'}=$mode;
1.71 albertel 564: }
1.64 albertel 565: &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
1.52 albertel 566: my $file=&Apache::lonnet::filelocation("",$request->uri);
567:
568: #check if we know where we are
569: if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) {
570: # if we are browsing we might not be able to know where we are
571: if ($Apache::lonhomework::browse ne 'F') {
572: #should know where we are, so ask
573: $request->internal_redirect('/adm/ambiguous'); return;
1.41 albertel 574: }
1.52 albertel 575: }
1.41 albertel 576:
1.52 albertel 577: if ($ENV{'request.state'} eq "construct") {
1.62 albertel 578: if ($ENV{'form.resetdata'} eq 'Reset Submissions') {
579: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
580: &Apache::lonnet::tmpreset($symb,'',$domain,$name);
581: }
1.52 albertel 582: if ( -e $file ) {
583: if (!(defined $ENV{'form.problemmode'})) {
584: #first visit to problem in construction space
1.64 albertel 585: #&view_or_edit_menu($request);
586: $ENV{'form.problemmode'}='View';
587: &renderpage($request,$file);
588: } elsif ($ENV{'form.problemmode'} eq 'EditXML') {
589: &editxmlmode($request,$file);
1.74 albertel 590: } elsif ($ENV{'form.problemmode'} eq 'Answer Distribution') {
591: &analyze($request,$file);
1.52 albertel 592: } else {
593: &renderpage($request,$file);
1.41 albertel 594: }
595: } else {
1.52 albertel 596: # requested file doesn't exist in contruction space
597: &newproblem($request);
1.41 albertel 598: }
1.52 albertel 599: } else {
600: # just render the page normally outside of construction space
1.74 albertel 601: &Apache::lonxml::debug("not construct");
1.52 albertel 602: &renderpage($request,$file);
603: }
604: #my $td=&tv_interval($t0);
605: #&Apache::lonxml::debug("Spent $td seconds processing");
606: # &Apache::lonhomework::send_footer($request);
607: # always turn off debug messages
608: $Apache::lonxml::debug=0;
609: return OK;
610:
1.1 albertel 611: }
612:
613: 1;
614: __END__
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