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Diff for /loncom/homework/lonhomework.pm between versions 1.20 and 1.51

version 1.20, 2000/12/12 22:35:52 version 1.51, 2001/08/06 18:24:37
Line 1 Line 1
 # The LON-CAPA Homework handler  # The LON-CAPA homework handler
 # Guy Albertelli  # 
   # Handles homework.
   #
   # YEAR=2000
   # 7/25,8/2,8/7,8/8,8/11,9/14,9/19,10/2,10/5,10/11,11/7,11/21 Guy Albertelli
 # 11/30 Gerd Kortemeyer  # 11/30 Gerd Kortemeyer
   # 12/4,12/8,12/12,12/15,12/19,12/21 Guy Albertelli
   # YEAR=2001
   # 1/6,1/8,1/9,1/10,1/11,1/12,1/15,1/25,2/7,2/13,2/19,4/16,4/26 Guy Albertelli
   # 5/4,5/13,5/21 Guy Albertelli
   # 6/1 Gerd Kortemeyer
   # 6/5,6/12,6/26,7/2,7/18 Guy Albertelli
   # 8/6 Scott Harrison
   
 package Apache::lonhomework;  package Apache::lonhomework;
 use strict;  use strict;
Line 10  use Apache::lonnet; Line 21  use Apache::lonnet;
 use Apache::inputtags;  use Apache::inputtags;
 use Apache::structuretags;  use Apache::structuretags;
 use Apache::response;  use Apache::response;
   use Apache::hint;
   use Apache::outputtags;
   use Apache::Constants qw(:common);
   #use Time::HiRes qw( gettimeofday tv_interval );
   
   # ======================================================================= BEGIN
   sub BEGIN {
     &Apache::lonxml::register_insert();
   }
   
   # =============================================== Get target (returns an array)
 sub get_target {  sub get_target {
   if ( $ENV{'request.state'} eq "published") {      if ( $ENV{'request.state'} eq "published") {
     if ( defined $ENV{'form.submit'}) {   if ( defined $ENV{'form.submitted'}) {
       return ('grade', 'web');      return ('grade','web');
     } else {   } else {
       return ('web');      return ('web');
    }
       } elsif ($ENV{'request.state'} eq "construct") {
    if ( defined $ENV{'form.preview'}) {
       if ( defined $ENV{'form.submitted'}) {
    return ('grade','web');
       } else {
    return ('web');
       }
    } else {
       if ( $ENV{'form.problemmode'} eq 'View' ) {
    if ( defined $ENV{'form.submitted'}) {
       return ('grade','web');
    } else {
       return ('web');
    }
       } elsif ( $ENV{'form.problemmode'} eq 'Edit' ) {
    if ( $ENV{'form.submitted'} eq 'edit' ) {
       return ('modified','edit');
    } else {
       return ('edit');
    }
       } else {
    return ('web');
       }
    }
     }      }
   } elsif ($ENV{'request.state'} eq "construct") {      return ();
     if ( defined $ENV{'form.preview'}) {  
       if ( defined $ENV{'form.submit'}) {  
  return ('grade', 'web');  
       } else {  
  return ('web');  
       }  
     } else {  
       return ('edit');  
     }  
   }  
   return ();  
 }  }
   
   # ===================================== Set up variables (return scalar string)
 sub setup_vars {  sub setup_vars {
   my ($target) = @_;      my ($target) = @_;
   return ';'      return ';'
 #  return ';$external::target='.$target.';';  #  return ';$external::target='.$target.';';
 }  }
   
   # ================================================================= Send header
 sub send_header {  sub send_header {
   my ($request)= @_;      my ($request) = @_;
   $request->print(&Apache::lontexconvert::header());      $request->print(&Apache::lontexconvert::header());
   $ENV{'request.uri'}=$request->uri;  
 #  $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');  #  $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
 }  }
   
   # ================================================================= Create menu
   sub createmenu {
       my ($which,$request) = @_;
       if ($which eq 'grade') {
    $request->print('<script language="JavaScript">'."\n".
           'hwkmenu=window.open("/res/adm/pages/homeworkmenu.html'.
         '","homeworkremote","height=350,width=150,menubar=no");'.
         '</script>');
       }
   }
   
   # ================================================================= Send footer
 sub send_footer {  sub send_footer {
   my ($request)= @_;      my ($request) = @_;
 #  $request->print('</form>');  #  $request->print('</form>');
   $request->print(&Apache::lontexconvert::footer());      $request->print(&Apache::lontexconvert::footer());
 }  }
   
   $Apache::lonxml::browse = '';
   
   # =============================================== Check date (returns an array)
 sub check_date {  sub check_date {
   my ($type,$id) = @_;      my ($id) = @_;
   my $date ='';      my $date ='';
   my $passed = '';      my $status = '';
   &Apache::lonxml::debug("checking :$type: for part :$id:");      my $datemsg = '';
   if ($type eq 'OPEN_DATE') {      my $lastdate = '';
     $date = &Apache::lonnet::EXT("resource.$id.opendate");      my $temp;
   } elsif ($type eq 'DUE_DATE') {      my $type;
     $date = &Apache::lonnet::EXT("resource.$id.duedate");      my $passed;
   } elsif ($type eq 'START_DATE') {      &Apache::lonxml::debug("checking for part :$id:");
     $date = &Apache::lonnet::EXT("resource.$id.duedate");      foreach $temp ("opendate","duedate","answerdate") {
   } else {   $lastdate = $date;
     &Apache::lonxml::error("Unknown date request $type");   $date = &Apache::lonnet::EXT("resource.$id.$temp");
     $date = '';   &Apache::lonxml::debug("found :$date: for :$temp:");
   }   if ($date eq '') {
   &Apache::lonxml::debug("found :$date:");      $date = "an unknown date"; $passed = 0;
   if ($date eq '') {   } elsif ($date eq 'con_lost') {
     $date = "an unknown date"; $passed = 0;      $date = "an indeterminate date"; $passed = 0;
   } else {   } else {
     if (time < $date) { $passed = 0; } else { $passed = 1; }      if (time < $date) { $passed = 0; } else { $passed = 1; }
     $date = localtime $date;      $date = localtime $date;
   }   }
   &Apache::lonxml::debug("sending back :$date:$passed:");   if (!$passed) { $type = $temp; last; }
   return ($date,$passed);      }
       &Apache::lonxml::debug("have :$type:$passed:");
       if ($passed) {
    $status = 'SHOW_ANSWER';
    $datemsg = $date;
       } elsif ($type eq 'opendate') {
    $status = 'CLOSED';
    $datemsg = "will open on $date";
       } elsif ($type eq 'duedate') {
    $status = 'CAN_ANSWER';
    $datemsg = "is due at $date";
       } elsif ($type eq 'answerdate') {
    $status = 'CLOSED';
    $datemsg = "was due on $lastdate, and answers will be available on ".
              "$date";
       }
       if ($status eq 'CAN_ANSWER') {
    #check #tries
    my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
    if ( $tries eq '' ) { $tries = '0'; }
    if ( $maxtries eq '' ) { $maxtries = '2'; } 
    if ($tries >= $maxtries) { $status = 'CANNOT_ANSWER'; } 
       }
       &Apache::lonxml::debug("sending back :$status:$datemsg:");
       if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
    &Apache::lonxml::debug("should be allowed to browse a resource when ".
          "closed");
    $status = 'CAN_ANSWER';
    $datemsg = 'is closed but you are allowed to view it';
       }
       if ($ENV{'request.state'} eq "construct") {
    &Apache::lonxml::debug("in construction ignoring dates");
    $status = 'CAN_ANSWER';
    $datemsg = 'is in under construction';
       }
       return ($status,$datemsg);
 }  }
   
 sub handler {  # ================================================================== Shows hash
   my $request=$_[0];  sub showhash {
       my (%hash) = @_;
       my $resultkey;
       foreach $resultkey (sort keys %hash) {
    &Apache::lonxml::debug("$resultkey ---- $hash{$resultkey}");
       }
       &Apache::lonxml::debug("\n<br />restored values^</br>\n");
       return '';
   }
   
   if ( $ENV{'user.name'} eq 'albertel' ) { $Apache::lonxml::debug=1; }  # =========================================================== Setup permissions
     sub setuppermissions {
   my (@targets) = &get_target();      $Apache::lonhomework::browse = &Apache::lonnet::allowed('bre',
        $ENV{'request.filename'});
   if ($ENV{'browser.mathml'}) {      $Apache::lonhomework::viewgrades = &Apache::lonnet::allowed('vgr',
     $request->content_type('text/xml');      $ENV{'request.course.id'});
   } else {      return '';
     $request->content_type('text/html');  }
   }  
   $request->send_http_header;  # ================================================================ Setup header
   return 'OK' if $request->header_only;  sub setupheader {
         my $request = $_[0];
   &Apache::lonhomework::send_header($request);      if ($ENV{'browser.mathml'}) {
      $request->content_type('text/xml');
   #check if allowed to see      } else {
      $request->content_type('text/html');
   foreach my $target (@targets) {      }
     my $file=&Apache::lonnet::filelocation("",$request->uri);      $request->send_http_header;
     my $problem=&Apache::lonnet::getfile($file);      return OK if $request->header_only;
     if ($problem == -1) {      return '';
       &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");  }
       $problem='';  
   # ========================================================= Handle save or undo
   sub handle_save_or_undo {
       my ($request,$problem,$result) = @_;
       my $fileout = &Apache::lonnet::filelocation("",$request->uri);
       my $filesave = $fileout.".bak";
       if ($ENV{'form.Undo'} eq 'undo') {
    if (copy($filesave,$fileout)) {
       $request->print("<b>Undid changes, Copied $filesave to $fileout".
       "<br /></b>");
    } else {
       $request->print("<font color=\"red\" size=\"+1\"><b>Unable to ".
       "undo, unable to copy $filesave to $fileout<br ".
       "/></b></font>");
    }
       } else {
    my $fs=Apache::File->new(">$filesave");
    if (defined($fs)) {
       print $fs $$problem;
       $request->print("<b>Making Backup to $filesave</b><br />");
    } else {
       $request->print("<font color=\"red\" size=\"+1\"><b>Unable to ".
       "make backup $filesave</b></font>");
    }
    my $fh=Apache::File->new(">$fileout");
    if (defined($fh)) {
       print $fh $$result;
       $request->print("<b>Saving Modifications to $fileout</b><br />");
    } else {
       $request->print("<font color=\"red\" size=\"+1\"><b>Unable to ".
       "write to $fileout</b></font>");
    }
     }      }
   }
   
   # ================================================================= Render page
   sub renderpage {
       my ($request,$file) = @_;
           
     my %mystyle;      my (@targets) = &get_target();
     my $result = '';      foreach my $target (@targets) {
     &Apache::inputtags::initialize_inputtags;   #my $t0 = [&gettimeofday()];
     %Apache::lonhomework::results=();   my $problem=&Apache::lonnet::getfile($file);
     %Apache::lonhomework::history=&Apache::lonnet::restore;   if ($problem == -1) {
     #ignore error conditions      &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
     my ($temp)=keys %Apache::lonhomework::history ;      $problem='';
     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }    }
     if ($target eq 'web' && &Apache::lonnet::symbread() eq '') {  
       $request->print("Vieiwing this problem as not a student, submissions will be ignored.");   my %mystyle;
     }   my $result = '';
     if ($target eq 'grade') {   &Apache::inputtags::initialize_inputtags;
       my $resultkey;   &Apache::edit::initialize_edit;
       foreach $resultkey (sort keys %Apache::lonhomework::history) {   %Apache::lonhomework::results=();
  &Apache::lonxml::debug("$resultkey ---- $Apache::lonhomework::history{$resultkey}");   %Apache::lonhomework::history=&Apache::lonnet::restore();
       }   #ignore error conditions
       &Apache::lonxml::debug("\n<br>restored values^</br>\n");   my ($temp)=keys %Apache::lonhomework::history ;
    if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); } 
    if ($target eq 'web') {
       if (&Apache::lonnet::symbread() eq '') {
    if ($ENV{'request.state'} eq "construct") {
       $request->print("In construction space, submissions ".
       "ignored<br />");
    } else {
       $request->print("Browsing or <a href=\"/adm/ambiguous\">".
       "ambiguous</a> reference, submissions ".
       "ignored<br />");
    }
       }
       #if ($Apache::lonhomework::viewgrades eq 'F') {&createmenu('grade',$request); }
    }
    if ($target eq 'grade') { &showhash(%Apache::lonhomework::history); }
   
    my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/'.
        'includes/default_homework.lcpm');
    if ($default == -1) {
       &Apache::lonxml::error("<b>Unable to find <i>default_homework.".
      "lcpm</i></b>");
       $default='';
    }
    $result = &Apache::lonxml::xmlparse($target, $problem,
       $default.&setup_vars($target),
       %mystyle);
    #$request->print("Result follows:");
    if ($target eq 'modified') {
       &handle_save_or_undo($request,\$problem,\$result);
    } else {
       #my $td=&tv_interval($t0);
       #if ( $Apache::lonxml::debug) {
       #$result =~ s:</body>::;
       #$result.="<br />Spent $td seconds processing target $target\n</body>";
       #}
       $request->print($result);
    }
    #$request->print(":Result ends");
    if ($target eq 'grade') { &showhash(%Apache::lonhomework::results); }
   
    #store new values
    my ($temp) = keys %Apache::lonhomework::results;
    if ( $temp ne '' ) {
       &Apache::lonxml::debug("Store return message:".
         &Apache::lonnet::cstore(\%Apache::lonhomework::results));
    }
    #my $td=&tv_interval($t0);
     }      }
     my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');  }
     if ($default == -1) {  
       &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");  # =========================================================== Get template list
       $default='';  # with no arg it returns a HTML <option> list of the template titles
   # with one arg it returns the filename associated with the arg passed
   sub get_template_list {
       my ($namewanted,$extension) = @_;
       my $result;
       &Apache::lonxml::debug("Looking for :$extension:");
       foreach my $file
    (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
    my $name=&Apache::lonnet::metadata($file,'title');
    if ($namewanted && ($name eq $namewanted)) {
       $result=$file;
       last;
    } else {
       $result.="<option>$name</option>";
    }
     }      }
     if ( $target eq 'grade') {       return $result;
       $Apache::lonxml::textredirection = 0;   }
   
   # ================================================================= New problem
   sub newproblem {
       my ($request) = @_;
       my $extension = $request->uri;
       $extension =~ s:^.*\.([\w]+)$:$1:;
       &Apache::lonxml::debug("Looking for :$extension:");
       if ($ENV{'form.template'}) {
    use File::Copy;
    my $file = &get_template_list($ENV{'form.template'},$extension);
    my $dest = &Apache::lonnet::filelocation("",$request->uri);
    copy($file,$dest);
    &renderpage($request,$file);
     } else {      } else {
       $Apache::lonxml::textredirection = 1;    my $templatelist = &get_template_list('',$extension);
    my $url = $request->uri;
    my $dest = &Apache::lonnet::filelocation("",$request->uri);
    $request->print(<<ENDNEWPROBLEM);
   <body bgcolor="#FFFFFF">
   The request file $url doesn\'t exist. You can create a new $extension <br />
   <form action="$url" method="POST">
   <input type="submit" value="New $extension"><br />
   <select name="template">
   $templatelist
   </select>
   </form>
   </body>
   ENDNEWPROBLEM
     }
   
     return '';
   }
   
   sub view_or_edit_menu {
       my ($request) = @_;
       my $url = $request->uri;
       $request->print(<<EDITMENU);
   <body bgcolor="#FFFFFF">
   <form action="$url" method="POST">
   Would you like to <input type="submit" name="problemmode" value="View"> or
   <input type="submit" name="problemmode" value="Edit"> the problem.
   </form>
   </body>
   EDITMENU
   }
   
   # ===================================================================== Handler
   sub handler {
       #my $t0 = [&gettimeofday()];
       my $request = $_[0];
   
       if ( $ENV{'user.name'} eq 'albertel' ) {$Apache::lonxml::debug = 1;}
   
     if (&setupheader($request)) { return OK; }
     $ENV{'request.uri'} = $request->uri;
   
     #setup permissions
       $Apache::lonhomework::browse = &Apache::lonnet::allowed('bre',
        $ENV{'request.filename'});
       $Apache::lonhomework::viewgrades = &Apache::lonnet::allowed('vgr',
       $ENV{'request.course.id'});
       &Apache::lonxml::debug("Permissions:".
      $Apache::lonhomework::browse.":".
      $Apache::lonhomework::viewgrades.":");
   
       my $file = &Apache::lonnet::filelocation("",$request->uri);
   
       #check if we know where we are
       if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) { 
    # if we are browsing we might not be able to know where we are
    if ($Apache::lonhomework::browse ne 'F') {
       #should know where we are, so ask
       $request->internal_redirect('/adm/ambiguous'); return;
    }
     }      }
     $result = &Apache::lonxml::xmlparse($target, $problem,  
  $default.&setup_vars($target),%mystyle);  
   
     #$request->print("Result follows:");      if ($ENV{'request.state'} eq "construct") {
     $request->print($result);   if ( -e $file ) {
     #$request->print(":Result ends");      if (!(defined $ENV{'form.problemmode'})) {
     if ($target eq 'grade') {   #first visit to problem in construction space
       my $resultkey;   &view_or_edit_menu($request);
       foreach $resultkey (sort keys %Apache::lonhomework::results) {   #&renderpage($request,$file);
  &Apache::lonxml::debug("$resultkey ---- $Apache::lonhomework::results{$resultkey}");      } else {
    &renderpage($request,$file);
       }        }
       &Apache::lonxml::debug("\n<br>storing values^</br>\n");   } else {
     }      # requested file doesn't exist in contruction space
           &newproblem($request);
     my ($temp) = keys %Apache::lonhomework::results;   }
     if ( $temp ne '' ) {      } else {
       &Apache::lonxml::debug("Store return message:".&Apache::lonnet::cstore(%Apache::lonhomework::results));   # just render the page normally outside of construction space
    &renderpage($request,$file);
     }      }
   }      #my $td=&tv_interval($t0);
   &Apache::lonhomework::send_footer($request);      #&Apache::lonxml::debug("Spent $td seconds processing");
         # &Apache::lonhomework::send_footer($request);
   return 'OK';      # always turn off debug messages
       $Apache::lonxml::debug=0;
       return OK;
 }  }
   
 1;  1;
   
 __END__  __END__
Removed from v.1.20  
changed lines
  Added in v.1.51

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