Annotation of loncom/homework/lonhomework.pm, revision 1.52
1.52 ! albertel 1: # The LON-CAPA Homework handler
! 2: # Guy Albertelli
1.17 www 3: # 11/30 Gerd Kortemeyer
1.25 www 4: # 6/1 Gerd Kortemeyer
1.1 albertel 5:
6: package Apache::lonhomework;
7: use strict;
8: use Apache::style;
9: use Apache::lonxml;
1.2 albertel 10: use Apache::lonnet;
11: use Apache::inputtags;
12: use Apache::structuretags;
1.9 albertel 13: use Apache::response;
1.22 albertel 14: use Apache::hint;
1.31 albertel 15: use Apache::outputtags;
1.26 www 16: use Apache::Constants qw(:common);
1.47 albertel 17: #use Time::HiRes qw( gettimeofday tv_interval );
1.43 albertel 18:
19: sub BEGIN {
20: &Apache::lonxml::register_insert();
21: }
22:
1.5 albertel 23: sub get_target {
1.52 ! albertel 24: if ( $ENV{'request.state'} eq "published") {
! 25: if ( defined $ENV{'form.submitted'}) {
! 26: return ('grade', 'web');
! 27: } else {
! 28: return ('web');
! 29: }
! 30: } elsif ($ENV{'request.state'} eq "construct") {
! 31: if ( defined $ENV{'form.preview'}) {
! 32: if ( defined $ENV{'form.submitted'}) {
! 33: return ('grade', 'web');
! 34: } else {
! 35: return ('web');
! 36: }
! 37: } else {
! 38: if ( $ENV{'form.problemmode'} eq 'View' ) {
1.42 albertel 39: if ( defined $ENV{'form.submitted'}) {
1.52 ! albertel 40: return ('grade', 'web');
1.42 albertel 41: } else {
1.52 ! albertel 42: return ('web');
1.42 albertel 43: }
1.52 ! albertel 44: } elsif ( $ENV{'form.problemmode'} eq 'Edit' ) {
! 45: if ( $ENV{'form.submitted'} eq 'edit' ) {
! 46: return ('modified','edit');
1.42 albertel 47: } else {
1.52 ! albertel 48: return ('edit');
1.42 albertel 49: }
1.52 ! albertel 50: } else {
! 51: return ('web');
! 52: }
1.15 albertel 53: }
1.52 ! albertel 54: }
! 55: return ();
1.5 albertel 56: }
57:
1.3 albertel 58: sub setup_vars {
1.52 ! albertel 59: my ($target) = @_;
! 60: return ';'
1.11 albertel 61: # return ';$external::target='.$target.';';
1.2 albertel 62: }
63:
64: sub send_header {
1.52 ! albertel 65: my ($request)= @_;
! 66: $request->print(&Apache::lontexconvert::header());
1.16 albertel 67: # $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
1.2 albertel 68: }
69:
1.36 albertel 70: sub createmenu {
1.52 ! albertel 71: my ($which,$request)=@_;
! 72: if ($which eq 'grade') {
! 73: $request->print('<script language="JavaScript">
! 74: hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
! 75: "height=350,width=150,menubar=no");
! 76: </script>');
! 77: }
1.36 albertel 78: }
79:
1.2 albertel 80: sub send_footer {
1.52 ! albertel 81: my ($request)= @_;
1.16 albertel 82: # $request->print('</form>');
1.52 ! albertel 83: $request->print(&Apache::lontexconvert::footer());
1.2 albertel 84: }
85:
1.52 ! albertel 86: $Apache::lonxml::browse='';
1.20 albertel 87: sub check_date {
1.52 ! albertel 88: my ($id) = @_;
! 89: my $date ='';
! 90: my $status = '';
! 91: my $datemsg = '';
! 92: my $lastdate = '';
! 93: my $temp;
! 94: my $type;
! 95: my $passed;
! 96: &Apache::lonxml::debug("checking for part :$id:");
! 97: foreach $temp ("opendate","duedate","answerdate") {
! 98: $lastdate = $date;
! 99: $date = &Apache::lonnet::EXT("resource.$id.$temp");
! 100: &Apache::lonxml::debug("found :$date: for :$temp:");
! 101: if ($date eq '') {
! 102: $date = "an unknown date"; $passed = 0;
! 103: } elsif ($date eq 'con_lost') {
! 104: $date = "an indeterminate date"; $passed = 0;
! 105: } else {
! 106: if (time < $date) { $passed = 0; } else { $passed = 1; }
! 107: $date = localtime $date;
1.51 harris41 108: }
1.52 ! albertel 109: if (!$passed) { $type=$temp; last; }
! 110: }
! 111: &Apache::lonxml::debug("have :$type:$passed:");
! 112: if ($passed) {
! 113: $status='SHOW_ANSWER';
! 114: $datemsg=$date;
! 115: } elsif ($type eq 'opendate') {
! 116: $status='CLOSED';
! 117: $datemsg = "will open on $date";
! 118: } elsif ($type eq 'duedate') {
! 119: $status='CAN_ANSWER';
! 120: $datemsg = "is due at $date";
! 121: } elsif ($type eq 'answerdate') {
! 122: $status='CLOSED';
! 123: $datemsg = "was due on $lastdate, and answers will be available on $date";
! 124: }
! 125: if ($status eq 'CAN_ANSWER') {
! 126: #check #tries
! 127: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
! 128: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
! 129: if ( $tries eq '' ) { $tries = '0'; }
! 130: if ( $maxtries eq '' ) { $maxtries = '2'; }
! 131: if ($tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
! 132: }
! 133: &Apache::lonxml::debug("sending back :$status:$datemsg:");
! 134: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
! 135: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
! 136: $status='CAN_ANSWER';
! 137: $datemsg='is closed but you are allowed to view it';
! 138: }
! 139: if ($ENV{'request.state'} eq "construct") {
! 140: &Apache::lonxml::debug("in construction ignoring dates");
! 141: $status='CAN_ANSWER';
! 142: $datemsg='is in under construction';
! 143: }
! 144: return ($status,$datemsg);
1.20 albertel 145: }
146:
1.41 albertel 147: sub showhash {
1.52 ! albertel 148: my (%hash) = @_;
! 149: my $resultkey;
! 150: foreach $resultkey (sort keys %hash) {
! 151: &Apache::lonxml::debug("$resultkey ---- $hash{$resultkey}");
! 152: }
! 153: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
! 154: return '';
1.41 albertel 155: }
156:
157: sub setuppermissions {
1.52 ! albertel 158: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
! 159: $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
! 160: return ''
1.41 albertel 161: }
162:
163: sub setupheader {
1.52 ! albertel 164: my $request=$_[0];
! 165: if ($ENV{'browser.mathml'}) {
! 166: $request->content_type('text/xml');
! 167: } else {
! 168: $request->content_type('text/html');
! 169: }
! 170: $request->send_http_header;
! 171: return OK if $request->header_only;
! 172: return ''
1.41 albertel 173: }
1.35 albertel 174:
1.47 albertel 175: sub handle_save_or_undo {
1.52 ! albertel 176: my ($request,$problem,$result) = @_;
! 177: my $fileout = &Apache::lonnet::filelocation("",$request->uri);
! 178: my $filesave=$fileout.".bak";
! 179:
! 180: if ($ENV{'form.Undo'} eq 'undo') {
! 181: if (copy($filesave,$fileout)) {
! 182: $request->print("<b>Undid changes, Copied $filesave to $fileout<br /></b>");
! 183: } else {
! 184: $request->print("<font color=\"red\" size=\"+1\"><b>Unable to undo, unable to copy $filesave to $fileout<br /></b></font>");
! 185: }
! 186: } else {
! 187: my $fs=Apache::File->new(">$filesave");
! 188: if (defined($fs)) {
! 189: print $fs $$problem;
! 190: $request->print("<b>Making Backup to $filesave</b><br />");
! 191: } else {
! 192: $request->print("<font color=\"red\" size=\"+1\"><b>Unable to make backup $filesave</b></font>");
! 193: }
! 194: my $fh=Apache::File->new(">$fileout");
! 195: if (defined($fh)) {
! 196: print $fh $$result;
! 197: $request->print("<b>Saving Modifications to $fileout</b><br />");
1.47 albertel 198: } else {
1.52 ! albertel 199: $request->print("<font color=\"red\" size=\"+1\"><b>Unable to write to $fileout</b></font>");
1.47 albertel 200: }
1.52 ! albertel 201: }
1.47 albertel 202: }
203:
1.41 albertel 204: sub renderpage {
1.52 ! albertel 205: my ($request,$file) = @_;
! 206:
! 207: my (@targets) = &get_target();
! 208: foreach my $target (@targets) {
! 209: #my $t0 = [&gettimeofday()];
! 210: my $problem=&Apache::lonnet::getfile($file);
! 211: if ($problem == -1) {
! 212: &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
! 213: $problem='';
! 214: }
! 215:
! 216: my %mystyle;
! 217: my $result = '';
! 218: &Apache::inputtags::initialize_inputtags;
! 219: &Apache::edit::initialize_edit;
! 220: %Apache::lonhomework::results=();
! 221: %Apache::lonhomework::history=&Apache::lonnet::restore();
! 222: #ignore error conditions
! 223: my ($temp)=keys %Apache::lonhomework::history ;
! 224: if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
! 225: if ($target eq 'web') {
! 226: if (&Apache::lonnet::symbread() eq '') {
! 227: if ($ENV{'request.state'} eq "construct") {
! 228: $request->print("In construction space, submissions ignored<br />");
1.36 albertel 229: } else {
1.52 ! albertel 230: $request->print("Browsing or <a href=\"/adm/ambiguous\">ambiguous</a> reference, submissions ignored<br />");
1.51 harris41 231: }
1.52 ! albertel 232: }
! 233: #if ($Apache::lonhomework::viewgrades eq 'F') {&createmenu('grade',$request); }
! 234: }
! 235: if ($target eq 'grade') { &showhash(%Apache::lonhomework::history); }
! 236:
! 237: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
! 238: if ($default == -1) {
! 239: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
! 240: $default='';
! 241: }
! 242: $result = &Apache::lonxml::xmlparse($target, $problem,
! 243: $default.&setup_vars($target),%mystyle);
! 244:
! 245: #$request->print("Result follows:");
! 246: if ($target eq 'modified') {
! 247: &handle_save_or_undo($request,\$problem,\$result);
! 248: } else {
! 249: #my $td=&tv_interval($t0);
! 250: #if ( $Apache::lonxml::debug) {
! 251: #$result =~ s:</body>::;
! 252: #$result.="<br />Spent $td seconds processing target $target\n</body>";
! 253: #}
! 254: $request->print($result);
! 255: }
! 256: #$request->print(":Result ends");
! 257: if ($target eq 'grade') { &showhash(%Apache::lonhomework::results); }
! 258:
! 259: #store new values
! 260: my ($temp) = keys %Apache::lonhomework::results;
! 261: if ( $temp ne '' ) {
! 262: &Apache::lonxml::debug("Store return message:".
! 263: &Apache::lonnet::cstore(\%Apache::lonhomework::results));
1.20 albertel 264: }
1.52 ! albertel 265: #my $td=&tv_interval($t0);
! 266: }
1.41 albertel 267: }
268:
1.42 albertel 269: # with no arg it returns a HTML <option> list of the template titles
270: # with one arg it returns the filename associated with the arg passed
271: sub get_template_list {
1.52 ! albertel 272: my ($namewanted,$extension) = @_;
! 273: my $result;
! 274: &Apache::lonxml::debug("Looking for :$extension:");
! 275: foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
! 276: my $name=&Apache::lonnet::metadata($file,'title');
! 277: if ($namewanted && ($name eq $namewanted)) {
! 278: $result=$file;
! 279: last;
! 280: } else {
! 281: $result.="<option>$name</option>";
1.42 albertel 282: }
1.52 ! albertel 283: }
! 284: return $result;
1.42 albertel 285: }
286:
287: sub newproblem {
1.52 ! albertel 288: my ($request) = @_;
! 289:
! 290: my $extension=$request->uri;
! 291: $extension=~s:^.*\.([\w]+)$:$1:;
! 292: &Apache::lonxml::debug("Looking for :$extension:");
! 293: if ($ENV{'form.template'}) {
! 294: use File::Copy;
! 295: my $file = &get_template_list($ENV{'form.template'},$extension);
! 296: my $dest = &Apache::lonnet::filelocation("",$request->uri);
! 297: copy($file,$dest);
! 298: &renderpage($request,$file);
! 299: } else {
! 300: my $templatelist=&get_template_list('',$extension);
! 301: my $url=$request->uri;
! 302: my $dest = &Apache::lonnet::filelocation("",$request->uri);
! 303: $request->print(<<ENDNEWPROBLEM);
1.42 albertel 304: <body bgcolor="#FFFFFF">
1.50 albertel 305: The request file $url doesn\'t exist. You can create a new $extension <br />
1.42 albertel 306: <form action="$url" method="POST">
1.50 albertel 307: <input type="submit" value="New $extension"><br />
1.42 albertel 308: <select name="template">
309: $templatelist
310: </select>
311: </form>
312: </body>
313: ENDNEWPROBLEM
314: }
315:
316: return '';
317: }
318:
319: sub view_or_edit_menu {
1.52 ! albertel 320: my ($request) = @_;
! 321: my $url=$request->uri;
! 322: $request->print(<<EDITMENU);
1.42 albertel 323: <body bgcolor="#FFFFFF">
324: <form action="$url" method="POST">
325: Would you like to <input type="submit" name="problemmode" value="View"> or
326: <input type="submit" name="problemmode" value="Edit"> the problem.
327: </form>
328: </body>
329: EDITMENU
330: }
331:
1.41 albertel 332: sub handler {
1.52 ! albertel 333: #my $t0 = [&gettimeofday()];
! 334: my $request=$_[0];
1.41 albertel 335:
1.52 ! albertel 336: if ( $ENV{'user.name'} eq 'albertel' ) {$Apache::lonxml::debug=1;}
1.41 albertel 337:
338: if (&setupheader($request)) { return OK; }
1.52 ! albertel 339: $ENV{'request.uri'}=$request->uri;
1.41 albertel 340:
341: #setup permissions
1.52 ! albertel 342: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
! 343: $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
! 344: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
! 345:
! 346: my $file=&Apache::lonnet::filelocation("",$request->uri);
! 347:
! 348: #check if we know where we are
! 349: if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) {
! 350: # if we are browsing we might not be able to know where we are
! 351: if ($Apache::lonhomework::browse ne 'F') {
! 352: #should know where we are, so ask
! 353: $request->internal_redirect('/adm/ambiguous'); return;
1.41 albertel 354: }
1.52 ! albertel 355: }
1.41 albertel 356:
1.52 ! albertel 357: if ($ENV{'request.state'} eq "construct") {
! 358: if ( -e $file ) {
! 359: if (!(defined $ENV{'form.problemmode'})) {
! 360: #first visit to problem in construction space
! 361: &view_or_edit_menu($request);
! 362: #&renderpage($request,$file);
! 363: } else {
! 364: &renderpage($request,$file);
1.41 albertel 365: }
366: } else {
1.52 ! albertel 367: # requested file doesn't exist in contruction space
! 368: &newproblem($request);
1.41 albertel 369: }
1.52 ! albertel 370: } else {
! 371: # just render the page normally outside of construction space
! 372: &renderpage($request,$file);
! 373: }
! 374: #my $td=&tv_interval($t0);
! 375: #&Apache::lonxml::debug("Spent $td seconds processing");
! 376: # &Apache::lonhomework::send_footer($request);
! 377: # always turn off debug messages
! 378: $Apache::lonxml::debug=0;
! 379: return OK;
! 380:
1.1 albertel 381: }
382:
383: 1;
384: __END__
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