Annotation of loncom/homework/lonhomework.pm, revision 1.66
1.63 albertel 1: # The LearningOnline Network with CAPA
1.52 albertel 2: # The LON-CAPA Homework handler
1.63 albertel 3: #
1.66 ! albertel 4: # $Id: lonhomework.pm,v 1.65 2001/12/06 16:19:05 matthew 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;
34: use Apache::style;
35: use Apache::lonxml;
1.2 albertel 36: use Apache::lonnet;
37: use Apache::inputtags;
38: use Apache::structuretags;
1.59 tsai 39: use Apache::randomlabel;
1.9 albertel 40: use Apache::response;
1.22 albertel 41: use Apache::hint;
1.31 albertel 42: use Apache::outputtags;
1.26 www 43: use Apache::Constants qw(:common);
1.47 albertel 44: #use Time::HiRes qw( gettimeofday tv_interval );
1.43 albertel 45:
46: sub BEGIN {
47: &Apache::lonxml::register_insert();
48: }
49:
1.5 albertel 50: sub get_target {
1.52 albertel 51: if ( $ENV{'request.state'} eq "published") {
1.66 ! albertel 52: if ( defined($ENV{'form.grade_target'})
! 53: && ($Apache::lonhomework::viewgrades == 'F' )) {
! 54: return ($ENV{'form.grade_target'});
! 55: }
1.62 albertel 56: if ( defined($ENV{'form.submitted'})) {
1.52 albertel 57: return ('grade', 'web');
58: } else {
59: return ('web');
60: }
61: } elsif ($ENV{'request.state'} eq "construct") {
1.62 albertel 62: if ( defined($ENV{'form.preview'})) {
63: if ( defined($ENV{'form.submitted'})) {
1.52 albertel 64: return ('grade', 'web');
65: } else {
66: return ('web');
67: }
68: } else {
69: if ( $ENV{'form.problemmode'} eq 'View' ) {
1.62 albertel 70: if ( defined($ENV{'form.submitted'}) &&
71: (!defined($ENV{'form.resetdata'})) ) {
1.60 albertel 72: return ('grade', 'web','answer');
1.42 albertel 73: } else {
1.60 albertel 74: return ('web','answer');
1.42 albertel 75: }
1.52 albertel 76: } elsif ( $ENV{'form.problemmode'} eq 'Edit' ) {
77: if ( $ENV{'form.submitted'} eq 'edit' ) {
78: return ('modified','edit');
1.42 albertel 79: } else {
1.52 albertel 80: return ('edit');
1.42 albertel 81: }
1.52 albertel 82: } else {
83: return ('web');
84: }
1.15 albertel 85: }
1.52 albertel 86: }
87: return ();
1.5 albertel 88: }
89:
1.3 albertel 90: sub setup_vars {
1.52 albertel 91: my ($target) = @_;
92: return ';'
1.11 albertel 93: # return ';$external::target='.$target.';';
1.2 albertel 94: }
95:
96: sub send_header {
1.52 albertel 97: my ($request)= @_;
98: $request->print(&Apache::lontexconvert::header());
1.16 albertel 99: # $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
1.2 albertel 100: }
101:
1.36 albertel 102: sub createmenu {
1.52 albertel 103: my ($which,$request)=@_;
104: if ($which eq 'grade') {
105: $request->print('<script language="JavaScript">
106: hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
107: "height=350,width=150,menubar=no");
108: </script>');
109: }
1.36 albertel 110: }
111:
1.2 albertel 112: sub send_footer {
1.52 albertel 113: my ($request)= @_;
1.16 albertel 114: # $request->print('</form>');
1.52 albertel 115: $request->print(&Apache::lontexconvert::footer());
1.2 albertel 116: }
117:
1.52 albertel 118: $Apache::lonxml::browse='';
1.53 www 119:
120: sub check_access {
1.52 albertel 121: my ($id) = @_;
122: my $date ='';
123: my $status = '';
124: my $datemsg = '';
125: my $lastdate = '';
126: my $temp;
127: my $type;
128: my $passed;
129: &Apache::lonxml::debug("checking for part :$id:");
130: foreach $temp ("opendate","duedate","answerdate") {
131: $lastdate = $date;
132: $date = &Apache::lonnet::EXT("resource.$id.$temp");
133: &Apache::lonxml::debug("found :$date: for :$temp:");
134: if ($date eq '') {
135: $date = "an unknown date"; $passed = 0;
136: } elsif ($date eq 'con_lost') {
137: $date = "an indeterminate date"; $passed = 0;
138: } else {
139: if (time < $date) { $passed = 0; } else { $passed = 1; }
140: $date = localtime $date;
1.51 harris41 141: }
1.52 albertel 142: if (!$passed) { $type=$temp; last; }
143: }
144: &Apache::lonxml::debug("have :$type:$passed:");
145: if ($passed) {
146: $status='SHOW_ANSWER';
147: $datemsg=$date;
148: } elsif ($type eq 'opendate') {
149: $status='CLOSED';
150: $datemsg = "will open on $date";
151: } elsif ($type eq 'duedate') {
152: $status='CAN_ANSWER';
153: $datemsg = "is due at $date";
154: } elsif ($type eq 'answerdate') {
155: $status='CLOSED';
156: $datemsg = "was due on $lastdate, and answers will be available on $date";
157: }
158: if ($status eq 'CAN_ANSWER') {
159: #check #tries
160: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
161: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
162: if ( $tries eq '' ) { $tries = '0'; }
163: if ( $maxtries eq '' ) { $maxtries = '2'; }
164: if ($tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
165: }
1.54 www 166:
1.56 www 167: if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
168: (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
1.54 www 169: return ('UNCHECKEDOUT','needs to be checked out');
170: }
171:
172:
1.52 albertel 173: &Apache::lonxml::debug("sending back :$status:$datemsg:");
174: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
175: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
176: $status='CAN_ANSWER';
177: $datemsg='is closed but you are allowed to view it';
178: }
179: if ($ENV{'request.state'} eq "construct") {
180: &Apache::lonxml::debug("in construction ignoring dates");
181: $status='CAN_ANSWER';
182: $datemsg='is in under construction';
183: }
184: return ($status,$datemsg);
1.20 albertel 185: }
186:
1.41 albertel 187: sub showhash {
1.52 albertel 188: my (%hash) = @_;
189: my $resultkey;
190: foreach $resultkey (sort keys %hash) {
191: &Apache::lonxml::debug("$resultkey ---- $hash{$resultkey}");
192: }
193: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
194: return '';
1.41 albertel 195: }
196:
197: sub setuppermissions {
1.52 albertel 198: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
199: $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
200: return ''
1.41 albertel 201: }
202:
203: sub setupheader {
1.52 albertel 204: my $request=$_[0];
205: if ($ENV{'browser.mathml'}) {
206: $request->content_type('text/xml');
207: } else {
208: $request->content_type('text/html');
209: }
1.64 albertel 210: if (!$Apache::lonxml::debug) { &Apache::loncommon::no_cache($request); }
1.52 albertel 211: $request->send_http_header;
212: return OK if $request->header_only;
213: return ''
1.41 albertel 214: }
1.35 albertel 215:
1.47 albertel 216: sub handle_save_or_undo {
1.52 albertel 217: my ($request,$problem,$result) = @_;
218: my $fileout = &Apache::lonnet::filelocation("",$request->uri);
219: my $filesave=$fileout.".bak";
1.64 albertel 220: my $error=0;
1.52 albertel 221:
222: if ($ENV{'form.Undo'} eq 'undo') {
223: if (copy($filesave,$fileout)) {
224: $request->print("<b>Undid changes, Copied $filesave to $fileout<br /></b>");
225: } else {
226: $request->print("<font color=\"red\" size=\"+1\"><b>Unable to undo, unable to copy $filesave to $fileout<br /></b></font>");
1.64 albertel 227: $error=1;
1.52 albertel 228: }
229: } else {
230: my $fs=Apache::File->new(">$filesave");
231: if (defined($fs)) {
232: print $fs $$problem;
233: $request->print("<b>Making Backup to $filesave</b><br />");
234: } else {
235: $request->print("<font color=\"red\" size=\"+1\"><b>Unable to make backup $filesave</b></font>");
1.64 albertel 236: $error=2;
1.52 albertel 237: }
238: my $fh=Apache::File->new(">$fileout");
239: if (defined($fh)) {
240: print $fh $$result;
241: $request->print("<b>Saving Modifications to $fileout</b><br />");
1.47 albertel 242: } else {
1.52 albertel 243: $request->print("<font color=\"red\" size=\"+1\"><b>Unable to write to $fileout</b></font>");
1.64 albertel 244: $error|=4;
1.47 albertel 245: }
1.52 albertel 246: }
1.64 albertel 247: return $error;
248: }
249:
250: sub editxmlmode {
251: my ($request,$file) = @_;
252: my $result;
253: my $problem=&Apache::lonnet::getfile($file);
254: if ($problem == -1) {
255: &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
256: $problem='';
257: }
258: if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) {
259: my $error=&handle_save_or_undo($request,\$problem,
260: \$ENV{'form.editxmltext'});
261: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
262: }
263: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
264: if ($cols > 80) { $cols = 80; }
265: $result.='<html><body bgcolor="#FFFFFF">
266: <form name="lonhomework" method="POST" action="'.
267: $ENV{'request.uri'}.'">
268: <input type="hidden" name="problemmode" value="EditXML" />
269: <input type="submit" name="problemmode" value="View" />
270: <input type="submit" name="problemmode" value="Edit" />
271: <hr />
272: <input type="submit" name="submit" value="Submit Changes" />
273: <input type="submit" name="Undo" value="undo" />
274: <hr />
275: <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
276: $problem.'</textarea>
277: </form></body></html>';
278: $request->print($result);
279: return '';
1.47 albertel 280: }
281:
1.41 albertel 282: sub renderpage {
1.52 albertel 283: my ($request,$file) = @_;
284:
285: my (@targets) = &get_target();
286: foreach my $target (@targets) {
287: #my $t0 = [&gettimeofday()];
288: my $problem=&Apache::lonnet::getfile($file);
289: if ($problem == -1) {
290: &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
291: $problem='';
292: }
293:
294: my %mystyle;
295: my $result = '';
296: &Apache::inputtags::initialize_inputtags;
297: &Apache::edit::initialize_edit;
298: if ($target eq 'web') {
299: if (&Apache::lonnet::symbread() eq '') {
300: if ($ENV{'request.state'} eq "construct") {
1.36 albertel 301: } else {
1.52 albertel 302: $request->print("Browsing or <a href=\"/adm/ambiguous\">ambiguous</a> reference, submissions ignored<br />");
1.51 harris41 303: }
1.52 albertel 304: }
305: #if ($Apache::lonhomework::viewgrades eq 'F') {&createmenu('grade',$request); }
306: }
1.64 albertel 307: #if ($target eq 'grade') { &showhash(%Apache::lonhomework::history); }
1.52 albertel 308:
309: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
310: if ($default == -1) {
311: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
312: $default='';
313: }
314: $result = &Apache::lonxml::xmlparse($target, $problem,
315: $default.&setup_vars($target),%mystyle);
316:
317: #$request->print("Result follows:");
318: if ($target eq 'modified') {
319: &handle_save_or_undo($request,\$problem,\$result);
320: } else {
321: #my $td=&tv_interval($t0);
322: #if ( $Apache::lonxml::debug) {
323: #$result =~ s:</body>::;
324: #$result.="<br />Spent $td seconds processing target $target\n</body>";
325: #}
326: $request->print($result);
327: }
328: #$request->print(":Result ends");
329: #my $td=&tv_interval($t0);
330: }
1.41 albertel 331: }
332:
1.42 albertel 333: # with no arg it returns a HTML <option> list of the template titles
334: # with one arg it returns the filename associated with the arg passed
335: sub get_template_list {
1.52 albertel 336: my ($namewanted,$extension) = @_;
337: my $result;
338: &Apache::lonxml::debug("Looking for :$extension:");
339: foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
340: my $name=&Apache::lonnet::metadata($file,'title');
341: if ($namewanted && ($name eq $namewanted)) {
342: $result=$file;
343: last;
344: } else {
345: $result.="<option>$name</option>";
1.42 albertel 346: }
1.52 albertel 347: }
348: return $result;
1.42 albertel 349: }
350:
351: sub newproblem {
1.65 matthew 352: my ($request) = @_;
353: my $extension=$request->uri;
354: $extension=~s:^.*\.([\w]+)$:$1:;
355: &Apache::lonxml::debug("Looking for :$extension:");
356: if ($ENV{'form.template'}) {
357: use File::Copy;
358: my $file = &get_template_list($ENV{'form.template'},$extension);
359: my $dest = &Apache::lonnet::filelocation("",$request->uri);
360: copy($file,$dest);
361: &renderpage($request,$dest);
362: } elsif($ENV{'form.newfile'}) {
363: # I don't like hard-coded filenames but for now, this will work.
364: use File::Copy;
365: my $templatefilename =
1.66 ! albertel 366: $request->dir_config('lonIncludes').'/templates/blank.problem';
! 367: &Apache::lonxml::debug("$templatefilename");
1.65 matthew 368: my $dest = &Apache::lonnet::filelocation("",$request->uri);
369: copy($templatefilename,$dest);
370: &renderpage($request,$dest);
371: }else {
372: my $templatelist=&get_template_list('',$extension);
373: my $url=$request->uri;
374: my $dest = &Apache::lonnet::filelocation("",$request->uri);
375: if (!defined($templatelist)) {
376: # We didn't find a template, so just create a blank problem.
377: $request->print(<<ENDNEWPROBLEM);
378: <body bgcolor="#FFFFFF">
379: The requested file $url doesn\'t exist. You can create a new $extension <br />
380: <form action="$url" method="POST">
381: <input type="submit" name="newfile" value="New $extension"><br />
382: </form>
383: </body>
384: ENDNEWPROBLEM
385: return '';
386: }
387: $request->print(<<ENDNEWPROBLEM);
1.42 albertel 388: <body bgcolor="#FFFFFF">
1.65 matthew 389: The requested file $url doesn\'t exist. You can create a new $extension <br />
1.42 albertel 390: <form action="$url" method="POST">
1.50 albertel 391: <input type="submit" value="New $extension"><br />
1.42 albertel 392: <select name="template">
393: $templatelist
394: </select>
395: </form>
396: </body>
397: ENDNEWPROBLEM
1.65 matthew 398: }
399: return '';
1.42 albertel 400: }
401:
402: sub view_or_edit_menu {
1.52 albertel 403: my ($request) = @_;
404: my $url=$request->uri;
405: $request->print(<<EDITMENU);
1.42 albertel 406: <body bgcolor="#FFFFFF">
407: <form action="$url" method="POST">
408: Would you like to <input type="submit" name="problemmode" value="View"> or
409: <input type="submit" name="problemmode" value="Edit"> the problem.
410: </form>
411: </body>
412: EDITMENU
413: }
414:
1.41 albertel 415: sub handler {
1.52 albertel 416: #my $t0 = [&gettimeofday()];
417: my $request=$_[0];
1.41 albertel 418:
1.52 albertel 419: if ( $ENV{'user.name'} eq 'albertel' ) {$Apache::lonxml::debug=1;}
1.41 albertel 420:
421: if (&setupheader($request)) { return OK; }
1.52 albertel 422: $ENV{'request.uri'}=$request->uri;
1.41 albertel 423:
424: #setup permissions
1.52 albertel 425: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
426: $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
427: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
1.64 albertel 428: &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
1.52 albertel 429: my $file=&Apache::lonnet::filelocation("",$request->uri);
430:
431: #check if we know where we are
432: if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) {
433: # if we are browsing we might not be able to know where we are
434: if ($Apache::lonhomework::browse ne 'F') {
435: #should know where we are, so ask
436: $request->internal_redirect('/adm/ambiguous'); return;
1.41 albertel 437: }
1.52 albertel 438: }
1.41 albertel 439:
1.52 albertel 440: if ($ENV{'request.state'} eq "construct") {
1.62 albertel 441: if ($ENV{'form.resetdata'} eq 'Reset Submissions') {
442: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
443: &Apache::lonnet::tmpreset($symb,'',$domain,$name);
444: }
1.52 albertel 445: if ( -e $file ) {
446: if (!(defined $ENV{'form.problemmode'})) {
447: #first visit to problem in construction space
1.64 albertel 448: #&view_or_edit_menu($request);
449: $ENV{'form.problemmode'}='View';
450: &renderpage($request,$file);
451: } elsif ($ENV{'form.problemmode'} eq 'EditXML') {
452: &editxmlmode($request,$file);
1.52 albertel 453: } else {
454: &renderpage($request,$file);
1.41 albertel 455: }
456: } else {
1.52 albertel 457: # requested file doesn't exist in contruction space
458: &newproblem($request);
1.41 albertel 459: }
1.52 albertel 460: } else {
461: # just render the page normally outside of construction space
462: &renderpage($request,$file);
463: }
464: #my $td=&tv_interval($t0);
465: #&Apache::lonxml::debug("Spent $td seconds processing");
466: # &Apache::lonhomework::send_footer($request);
467: # always turn off debug messages
468: $Apache::lonxml::debug=0;
469: return OK;
470:
1.1 albertel 471: }
472:
473: 1;
474: __END__
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