Annotation of loncom/homework/lonhomework.pm, revision 1.94
1.63 albertel 1: # The LearningOnline Network with CAPA
1.52 albertel 2: # The LON-CAPA Homework handler
1.63 albertel 3: #
1.94 ! bowersj2 4: # $Id: lonhomework.pm,v 1.93 2002/10/14 16:43:58 bowersj2 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 ='';
147: my $status = '';
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.$temp.type");
159: if ($thistype eq 'date_interval') {
160: if ($temp eq 'opendate') {
161: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
162: }
163: if ($temp eq 'answerdate') {
164: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
165: }
166: }
1.52 albertel 167: &Apache::lonxml::debug("found :$date: for :$temp:");
168: if ($date eq '') {
169: $date = "an unknown date"; $passed = 0;
170: } elsif ($date eq 'con_lost') {
171: $date = "an indeterminate date"; $passed = 0;
172: } else {
173: if (time < $date) { $passed = 0; } else { $passed = 1; }
174: $date = localtime $date;
1.51 harris41 175: }
1.52 albertel 176: if (!$passed) { $type=$temp; last; }
177: }
178: &Apache::lonxml::debug("have :$type:$passed:");
179: if ($passed) {
180: $status='SHOW_ANSWER';
181: $datemsg=$date;
182: } elsif ($type eq 'opendate') {
183: $status='CLOSED';
184: $datemsg = "will open on $date";
185: } elsif ($type eq 'duedate') {
186: $status='CAN_ANSWER';
187: $datemsg = "is due at $date";
188: } elsif ($type eq 'answerdate') {
189: $status='CLOSED';
190: $datemsg = "was due on $lastdate, and answers will be available on $date";
191: }
192: if ($status eq 'CAN_ANSWER') {
193: #check #tries
194: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
195: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
196: if ( $tries eq '' ) { $tries = '0'; }
197: if ( $maxtries eq '' ) { $maxtries = '2'; }
198: if ($tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
199: }
1.54 www 200:
1.56 www 201: if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
202: (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
1.54 www 203: return ('UNCHECKEDOUT','needs to be checked out');
204: }
205:
206:
1.52 albertel 207: &Apache::lonxml::debug("sending back :$status:$datemsg:");
208: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
1.91 albertel 209: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
1.52 albertel 210: $status='CAN_ANSWER';
211: $datemsg='is closed but you are allowed to view it';
212: }
213: if ($ENV{'request.state'} eq "construct") {
214: &Apache::lonxml::debug("in construction ignoring dates");
215: $status='CAN_ANSWER';
216: $datemsg='is in under construction';
217: }
218: return ($status,$datemsg);
1.20 albertel 219: }
220:
1.41 albertel 221: sub showhash {
1.52 albertel 222: my (%hash) = @_;
1.79 albertel 223: &showhashsubset(\%hash,'');
224: return '';
225: }
226:
227: sub showhashsubset {
228: my ($hash,$keyre) = @_;
1.52 albertel 229: my $resultkey;
1.79 albertel 230: foreach $resultkey (sort keys %$hash) {
231: if ($resultkey =~ /$keyre/) {
232: if (ref($$hash{$resultkey})) {
233: if ($$hash{$resultkey} =~ /ARRAY/ ) {
234: my $string="$resultkey ---- (";
235: foreach my $elm (@{ $$hash{$resultkey} }) {
236: $string.="$elm,";
237: }
238: chop($string);
239: &Apache::lonxml::debug("$string)");
240: } else {
241: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
1.73 albertel 242: }
243: } else {
1.79 albertel 244: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
1.73 albertel 245: }
246: }
1.52 albertel 247: }
248: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
249: return '';
1.41 albertel 250: }
251:
252: sub setuppermissions {
1.52 albertel 253: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
254: $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
255: return ''
1.41 albertel 256: }
257:
258: sub setupheader {
1.52 albertel 259: my $request=$_[0];
260: if ($ENV{'browser.mathml'}) {
261: $request->content_type('text/xml');
262: } else {
263: $request->content_type('text/html');
264: }
1.68 albertel 265: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
266: &Apache::loncommon::no_cache($request);
267: }
1.52 albertel 268: $request->send_http_header;
269: return OK if $request->header_only;
270: return ''
1.41 albertel 271: }
1.35 albertel 272:
1.47 albertel 273: sub handle_save_or_undo {
1.52 albertel 274: my ($request,$problem,$result) = @_;
1.70 albertel 275: my $file = &Apache::lonnet::filelocation("",$request->uri);
276: my $filebak =$file.".bak";
277: my $filetmp =$file.".tmp";
1.64 albertel 278: my $error=0;
1.52 albertel 279:
280: if ($ENV{'form.Undo'} eq 'undo') {
1.70 albertel 281: my $error=0;
282: if (!copy($file,$filetmp)) { $error=1; }
283: if ((!$error) && (!copy($filebak,$file))) { $error=1; }
284: if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
285: if (!$error) {
286: $request->print("<p><b>Undid changes, Switched $filebak and $file</b></p>");
1.52 albertel 287: } else {
1.70 albertel 288: $request->print("<p><font color=\"red\" size=\"+1\"><b>Unable to undo, unable to switch $filebak and $file</b></font></p>");
1.64 albertel 289: $error=1;
1.52 albertel 290: }
291: } else {
1.70 albertel 292: my $fs=Apache::File->new(">$filebak");
1.52 albertel 293: if (defined($fs)) {
294: print $fs $$problem;
1.70 albertel 295: $request->print("<b>Making Backup to $filebak</b><br />");
1.52 albertel 296: } else {
1.70 albertel 297: $request->print("<font color=\"red\" size=\"+1\"><b>Unable to make backup $filebak</b></font>");
1.64 albertel 298: $error=2;
1.52 albertel 299: }
1.70 albertel 300: my $fh=Apache::File->new(">$file");
1.52 albertel 301: if (defined($fh)) {
302: print $fh $$result;
1.70 albertel 303: $request->print("<b>Saving Modifications to $file</b><br />");
1.47 albertel 304: } else {
1.70 albertel 305: $request->print("<font color=\"red\" size=\"+1\"><b>Unable to write to $file</b></font>");
1.64 albertel 306: $error|=4;
1.47 albertel 307: }
1.52 albertel 308: }
1.64 albertel 309: return $error;
310: }
311:
1.74 albertel 312: sub analyze {
313: my ($request,$file) = @_;
314: &Apache::lonxml::debug("Analyze");
315: my $result=&Apache::lonnet::ssi($request->uri,('grade_target' => 'analyze'));
316: &Apache::lonxml::debug(":$result:");
317: (my $garbage,$result)=split(/_HASH_REF__/,$result,2);
318: &showhash(&Apache::lonnet::str2hash($result));
319: return $result;
320: }
321:
1.64 albertel 322: sub editxmlmode {
323: my ($request,$file) = @_;
324: my $result;
325: my $problem=&Apache::lonnet::getfile($file);
326: if ($problem == -1) {
327: &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
328: $problem='';
329: }
330: if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) {
331: my $error=&handle_save_or_undo($request,\$problem,
332: \$ENV{'form.editxmltext'});
333: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
334: }
1.80 albertel 335: &Apache::lonhomework::showhashsubset(\%ENV,'^form');
336: if ( $ENV{'form.submit'} eq 'Submit Changes and View' ) {
337: &Apache::lonhomework::showhashsubset(\%ENV,'^form');
338: $ENV{'form.problemmode'}='View';
339: &renderpage($request,$file);
340: } else {
341: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
1.82 bowersj2 342: my $xml_help = Apache::loncommon::help_open_topic("Problem_Editor_XML_Index");
1.80 albertel 343: if ($cols > 80) { $cols = 80; }
1.89 albertel 344: if ($cols < 70) { $cols = 70; }
345: if ($rows < 20) { $rows = 20; }
1.80 albertel 346: $result.='<html><body bgcolor="#FFFFFF">
1.64 albertel 347: <form name="lonhomework" method="POST" action="'.
348: $ENV{'request.uri'}.'">
349: <input type="hidden" name="problemmode" value="EditXML" />
1.80 albertel 350: <input type="submit" name="problemmode" value="Discard Edits and View" />
1.64 albertel 351: <input type="submit" name="problemmode" value="Edit" />
352: <hr />
353: <input type="submit" name="submit" value="Submit Changes" />
1.80 albertel 354: <input type="submit" name="submit" value="Submit Changes and View" />
1.64 albertel 355: <input type="submit" name="Undo" value="undo" />
356: <hr />
1.82 bowersj2 357: ' . $xml_help . ' Problem Help<br>
1.64 albertel 358: <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
1.73 albertel 359: &HTML::Entities::encode($problem).'</textarea>
1.64 albertel 360: </form></body></html>';
1.80 albertel 361: $request->print($result);
362: }
1.64 albertel 363: return '';
1.47 albertel 364: }
365:
1.41 albertel 366: sub renderpage {
1.52 albertel 367: my ($request,$file) = @_;
368:
369: my (@targets) = &get_target();
1.70 albertel 370: &Apache::lonxml::debug("Running targets ".join(':',@targets));
1.52 albertel 371: foreach my $target (@targets) {
372: #my $t0 = [&gettimeofday()];
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:
379: my %mystyle;
380: my $result = '';
381: &Apache::inputtags::initialize_inputtags;
382: &Apache::edit::initialize_edit;
1.74 albertel 383: if ($target eq 'analyze') { %Apache::lonhomework::anaylze=(); }
1.52 albertel 384: if ($target eq 'web') {
1.76 albertel 385: my ($symb)=&Apache::lonxml::whichuser();
386: if ($symb eq '') {
1.52 albertel 387: if ($ENV{'request.state'} eq "construct") {
1.36 albertel 388: } else {
1.84 bowersj2 389: my $help = Apache::loncommon::help_open_topic("Ambiguous_Reference");
390: $request->print("Browsing or <a href=\"/adm/ambiguous\">ambiguous</a> reference, submissions ignored $help<br />");
1.51 harris41 391: }
1.52 albertel 392: }
393: #if ($Apache::lonhomework::viewgrades eq 'F') {&createmenu('grade',$request); }
394: }
1.85 albertel 395: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
396: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%ENV,'^form');}
1.52 albertel 397:
1.91 albertel 398: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
1.52 albertel 399: if ($default == -1) {
1.91 albertel 400: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
1.52 albertel 401: $default='';
402: }
1.70 albertel 403: &Apache::lonxml::debug("Should be parsing now");
1.78 albertel 404: $result = &Apache::lonxml::xmlparse($request, $target, $problem,
1.52 albertel 405: $default.&setup_vars($target),%mystyle);
406:
407: #$request->print("Result follows:");
408: if ($target eq 'modified') {
409: &handle_save_or_undo($request,\$problem,\$result);
410: } else {
1.74 albertel 411: if ($target eq 'analyze') {
412: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
1.75 albertel 413: undef(%Apache::lonhomework::analyze);
1.74 albertel 414: }
1.52 albertel 415: #my $td=&tv_interval($t0);
416: #if ( $Apache::lonxml::debug) {
417: #$result =~ s:</body>::;
418: #$result.="<br />Spent $td seconds processing target $target\n</body>";
419: #}
420: $request->print($result);
421: }
422: #$request->print(":Result ends");
423: #my $td=&tv_interval($t0);
424: }
1.41 albertel 425: }
426:
1.42 albertel 427: # with no arg it returns a HTML <option> list of the template titles
428: # with one arg it returns the filename associated with the arg passed
429: sub get_template_list {
1.52 albertel 430: my ($namewanted,$extension) = @_;
431: my $result;
1.85 albertel 432: my @allnames;
1.52 albertel 433: &Apache::lonxml::debug("Looking for :$extension:");
1.91 albertel 434: foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
1.52 albertel 435: my $name=&Apache::lonnet::metadata($file,'title');
436: if ($namewanted && ($name eq $namewanted)) {
437: $result=$file;
438: last;
439: } else {
1.85 albertel 440: push (@allnames, $name);
1.42 albertel 441: }
1.52 albertel 442: }
1.86 albertel 443: if (@allnames && !$result) {
1.85 albertel 444: $result="<option>Select a $extension type</option>\n<option>".
445: join('</option><option>',sort(@allnames)).'</option>';
446: }
1.52 albertel 447: return $result;
1.42 albertel 448: }
449:
450: sub newproblem {
1.65 matthew 451: my ($request) = @_;
452: my $extension=$request->uri;
453: $extension=~s:^.*\.([\w]+)$:$1:;
454: &Apache::lonxml::debug("Looking for :$extension:");
1.85 albertel 455: if ($ENV{'form.template'} &&
456: $ENV{'form.template'} ne "Select a $extension type") {
1.65 matthew 457: use File::Copy;
458: my $file = &get_template_list($ENV{'form.template'},$extension);
459: my $dest = &Apache::lonnet::filelocation("",$request->uri);
460: copy($file,$dest);
461: &renderpage($request,$dest);
462: } elsif($ENV{'form.newfile'}) {
463: # I don't like hard-coded filenames but for now, this will work.
464: use File::Copy;
465: my $templatefilename =
1.66 albertel 466: $request->dir_config('lonIncludes').'/templates/blank.problem';
467: &Apache::lonxml::debug("$templatefilename");
1.65 matthew 468: my $dest = &Apache::lonnet::filelocation("",$request->uri);
469: copy($templatefilename,$dest);
470: &renderpage($request,$dest);
1.85 albertel 471: } else {
1.65 matthew 472: my $templatelist=&get_template_list('',$extension);
473: my $url=$request->uri;
474: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1.85 albertel 475: my $instructions;
476: if ($templatelist) { $instructions=", select a template from the pull-down menu below. Then";}
1.65 matthew 477: $request->print(<<ENDNEWPROBLEM);
1.42 albertel 478: <body bgcolor="#FFFFFF">
1.85 albertel 479: The requested file $url doesn\'t exist. <br />
480: To create a new $extension$instructions click on the Create $extension button.
1.42 albertel 481: <form action="$url" method="POST">
482: ENDNEWPROBLEM
1.85 albertel 483: if (defined($templatelist)) {
484: $request->print("<select name=\"template\">$templatelist</select>");
485: }
486: $request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"Create $extension\" />");
487: $request->print("</form></body>");
1.65 matthew 488: }
489: return '';
1.42 albertel 490: }
491:
492: sub view_or_edit_menu {
1.52 albertel 493: my ($request) = @_;
494: my $url=$request->uri;
495: $request->print(<<EDITMENU);
1.42 albertel 496: <body bgcolor="#FFFFFF">
497: <form action="$url" method="POST">
498: Would you like to <input type="submit" name="problemmode" value="View"> or
499: <input type="submit" name="problemmode" value="Edit"> the problem.
500: </form>
501: </body>
502: EDITMENU
503: }
504:
1.41 albertel 505: sub handler {
1.52 albertel 506: #my $t0 = [&gettimeofday()];
507: my $request=$_[0];
1.41 albertel 508:
1.94 ! bowersj2 509: #if ( $ENV{'user.name'} eq 'albertel' ) {$Apache::lonxml::debug=1;}
1.41 albertel 510:
511: if (&setupheader($request)) { return OK; }
1.52 albertel 512: $ENV{'request.uri'}=$request->uri;
1.41 albertel 513:
514: #setup permissions
1.52 albertel 515: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
516: $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
517: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
1.71 albertel 518: # some times multiple problemmodes are submitted, need to select
519: # the last one
1.80 albertel 520: &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
1.72 albertel 521: if ( defined($ENV{'form.problemmode'}) &&
1.77 albertel 522: ref($ENV{'form.problemmode'}) ) {
1.80 albertel 523: &Apache::lonxml::debug("Problem Mode ".join(",",@$ENV{'form.problemmode'}));
1.72 albertel 524: my $mode=$ENV{'form.problemmode'}->[-1];
1.71 albertel 525: undef $ENV{'form.problemmode'};
1.72 albertel 526: $ENV{'form.problemmode'}=$mode;
1.71 albertel 527: }
1.64 albertel 528: &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
1.52 albertel 529: my $file=&Apache::lonnet::filelocation("",$request->uri);
530:
531: #check if we know where we are
532: if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) {
533: # if we are browsing we might not be able to know where we are
534: if ($Apache::lonhomework::browse ne 'F') {
535: #should know where we are, so ask
536: $request->internal_redirect('/adm/ambiguous'); return;
1.41 albertel 537: }
1.52 albertel 538: }
1.41 albertel 539:
1.52 albertel 540: if ($ENV{'request.state'} eq "construct") {
1.62 albertel 541: if ($ENV{'form.resetdata'} eq 'Reset Submissions') {
542: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
543: &Apache::lonnet::tmpreset($symb,'',$domain,$name);
544: }
1.52 albertel 545: if ( -e $file ) {
546: if (!(defined $ENV{'form.problemmode'})) {
547: #first visit to problem in construction space
1.64 albertel 548: #&view_or_edit_menu($request);
549: $ENV{'form.problemmode'}='View';
550: &renderpage($request,$file);
551: } elsif ($ENV{'form.problemmode'} eq 'EditXML') {
552: &editxmlmode($request,$file);
1.74 albertel 553: } elsif ($ENV{'form.problemmode'} eq 'Answer Distribution') {
554: &analyze($request,$file);
1.52 albertel 555: } else {
556: &renderpage($request,$file);
1.41 albertel 557: }
558: } else {
1.52 albertel 559: # requested file doesn't exist in contruction space
560: &newproblem($request);
1.41 albertel 561: }
1.52 albertel 562: } else {
563: # just render the page normally outside of construction space
1.74 albertel 564: &Apache::lonxml::debug("not construct");
1.52 albertel 565: &renderpage($request,$file);
566: }
567: #my $td=&tv_interval($t0);
568: #&Apache::lonxml::debug("Spent $td seconds processing");
569: # &Apache::lonhomework::send_footer($request);
570: # always turn off debug messages
571: $Apache::lonxml::debug=0;
572: return OK;
573:
1.1 albertel 574: }
575:
576: 1;
577: __END__
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