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Diff for /loncom/interface/loncoursedata.pm between versions 1.43 and 1.49

version 1.43, 2003/01/31 22:34:38 version 1.49, 2003/02/20 14:28:25
Line 261  with stopping downloading then can not t Line 261  with stopping downloading then can not t
   
 # ----- PROCESSING FUNCTIONS ---------------------------------------  # ----- PROCESSING FUNCTIONS ---------------------------------------
   
   
   
   =pod
   
   =item &get_sequence_assessment_data()
   
   AT THIS TIME THE USE OF THIS FUNCTION IS *NOT* RECOMMENDED
   
   Use lonnavmaps to build a data structure describing the order and 
   assessment contents of each sequence in the current course.
   
   The returned structure is a hash reference. 
   
   { title  => 'title',
     symb   => 'symb',
     source => '/s/o/u/r/c/e',
     type  => (container|assessment),
     contents     => [ {},{},{},{} ], # only for container
     parts        => [11,13,15],      # only for assessment
     response_ids => [12,14,16]       # only for assessment
   }
   
   Also returned are array references to the symbs and assessments contained
   in the sequence.
   
   $hash->{'contents'} is a reference to an array of hashes of the same structure.
   
   =cut
   
   sub get_sequence_assessment_data {
       return undef;
       my $fn=$ENV{'request.course.fn'};
       &Apache::lonnet::logthis('filename = '.$fn);
       ##
       ## use navmaps
       my $navmap = Apache::lonnavmaps::navmap->new($fn.".db",$fn."_parms.db",
                                                    1,0);
       if (!defined($navmap)) {
           return 'Can not open Coursemap';
       }
       my $iterator = $navmap->getIterator(undef, undef, undef, 1);
       ##
       ## Prime the pump 
       ## 
       ## We are going to loop until we run out of sequences/pages to explore for
       ## resources.  This means we have to start out with something to look
       ## at.
       my $curRes = $iterator->next(); # BEGIN_MAP
       $curRes = $iterator->next(); # The sequence itself
       #
       my $title = $curRes->title();
       my $symb  = $curRes->symb();
       my $src   = $curRes->src();
       #
       my @Sequences; 
       my @Assessments;
       my @Nested_Sequences = ();   # Stack of sequences, keeps track of depth
       my $top = { title    => $title,
                   symb     => $symb,
                   type     => 'container',
                   num_assess => 0,
                   contents   => [], };
       push (@Sequences,$top);
       push (@Nested_Sequences, $top);
       #
       # We need to keep track of which sequences contain homework problems
       # 
       while (scalar(@Nested_Sequences)) {
           $curRes = $iterator->next();
           my $currentmap = $Nested_Sequences[-1]; # Last one on the stack
           if ($curRes == $iterator->BEGIN_MAP()) {
               # get the map itself, instead of BEGIN_MAP
               $curRes = $iterator->next(); 
               $title = $curRes->title();
               $symb  = $curRes->symb();
               $src   = $curRes->src();
               my $newmap = { title    => $title,
                              src      => $src,
                              symb     => $symb,
                              type     => 'container',
                              num_assess => 0,
                              contents   => [],
                          };
               push (@{$currentmap->{'contents'}},$newmap); # this is permanent
               push (@Sequences,$newmap);
               push (@Nested_Sequences, $newmap); # this is a stack
               next;
           }
           if ($curRes == $iterator->END_MAP()) {
               pop(@Nested_Sequences);
               next;
           }
           next if (! ref($curRes));
           next if (! $curRes->is_problem() && !$curRes->randomout);
           # Okay, from here on out we only deal with assessments
           $title = $curRes->title();
           $symb  = $curRes->symb();
           $src   = $curRes->src();
           my $parts = $curRes->parts();
           my $assessment = { title => $title,
                              src   => $src,
                              symb  => $symb,
                              type  => 'assessment',
                          };
           push(@Assessments,$assessment);
           push(@{$currentmap->{'contents'}},$assessment);
           $currentmap->{'num_assess'}++;
       }
       return ($top,\@Sequences,\@Assessments);
   }
   
 =pod  =pod
   
 =item &ProcessTopResourceMap()  =item &ProcessTopResourceMap()
Line 522  sub ProcessTopResourceMap { Line 633  sub ProcessTopResourceMap {
             $errorMessage .= 'loncoursedata::ProcessTopLevelMap.';              $errorMessage .= 'loncoursedata::ProcessTopLevelMap.';
             $errorMessage .= "  bighash to_$currentResourceID not defined!";              $errorMessage .= "  bighash to_$currentResourceID not defined!";
             &Apache::lonnet::logthis($errorMessage);              &Apache::lonnet::logthis($errorMessage);
     last;      if (!defined($currentResourceID)) {last;}
  }   }
  my @nextResources=();   my @nextResources=();
  foreach (split(/\,/,$hash{'to_'.$currentResourceID})) {   foreach (split(/\,/,$hash{'to_'.$currentResourceID})) {
Line 1244  sub DownloadStudentCourseData { Line 1355  sub DownloadStudentCourseData {
   
 sub DownloadStudentCourseDataSeparate {  sub DownloadStudentCourseDataSeparate {
     my ($students,$checkDate,$cacheDB,$extract,$status,$courseID,$r,$c)=@_;      my ($students,$checkDate,$cacheDB,$extract,$status,$courseID,$r,$c)=@_;
     my $residualFile = '/home/httpd/perl/tmp/'.$courseID.'DownloadFile.db';      my $residualFile = $Apache::lonnet::tmpdir.$courseID.'DownloadFile.db';
     my $title = 'LON-CAPA Statistics';      my $title = 'LON-CAPA Statistics';
     my $heading = 'Download Course Data';      my $heading = 'Download Course Data';
   
     my $WhatIWant;      my $WhatIWant;
     $WhatIWant = '(^version:|';      $WhatIWant = '(^version:|';
     $WhatIWant .= '^\d+:.+?:(resource\.\d+\.';      $WhatIWant .= '^\d+:.+?:(resource\.\d+\.';
     $WhatIWant .= '(solved|tries|previous|awarded|(\d+\.submission))\s*$';      $WhatIWant .= '(solved|tries|previous|awarded|(\d+\.submission))\s*$';#'
     $WhatIWant .= '|timestamp)';      $WhatIWant .= '|timestamp)';
     $WhatIWant .= ')';      $WhatIWant .= ')';
   
Line 1325  sub DownloadStudentCourseDataSeparate { Line 1436  sub DownloadStudentCourseDataSeparate {
 sub CheckForResidualDownload {  sub CheckForResidualDownload {
     my ($cacheDB,$extract,$status,$courseID,$r,$c)=@_;      my ($cacheDB,$extract,$status,$courseID,$r,$c)=@_;
   
     my $residualFile = '/home/httpd/perl/tmp/'.$courseID.'DownloadFile.db';      my $residualFile = $Apache::lonnet::tmpdir.$courseID.'DownloadFile.db';
     if(!-e $residualFile) {      if(!-e $residualFile) {
         return 'OK';          return 'OK';
     }      }
Line 1389  sub CheckForResidualDownload { Line 1500  sub CheckForResidualDownload {
     return 'OK';      return 'OK';
 }  }
   
   
   ################################################
   ################################################
   
   =pod
   
   =item &make_into_hash($values);
   
   Returns a reference to a hash as described by $values.  $values is
   assumed to be the result of 
       join(':',map {&Apache::lonnet::escape($_)} %orighash;
   
   This is a helper function for get_current_state.
   
   =cut
   
   ################################################
   ################################################
   sub make_into_hash {
       my $values = shift;
       my %tmp = map { &Apache::lonnet::unescape($_); }
                                              split(':',$values);
       return \%tmp;
   }
   
   
   ################################################
   ################################################
   
   =pod
   
   =item &get_current_state($sname,$sdom,$symb,$courseid);
   
   Retrieve the current status of a students performance.  $sname and
   $sdom are the only required parameters.  If $symb is undef the results
   of an &Apache::lonnet::currentdump() will be returned.  
   If $courseid is undef it will be retrieved from the environment.
   
   The return structure is based on &Apache::lonnet::currentdump.  If
   $symb is unspecified, all the students data is returned in a hash of
   the form:
   ( 
     symb1 => { param1 => value1, param2 => value2 ... },
     symb2 => { param1 => value1, param2 => value2 ... },
   )
   
   If $symb is specified, a hash of 
   (
     param1 => value1, 
     param2 => value2,
   )
   is returned.
   
   If no data is found for $symb, or if the student has not performance data,
   an empty list is returned.
   
   =cut
   
   ################################################
   ################################################
   sub get_current_state {
       my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_;
       return () if (! defined($sname) || ! defined($sdom));
       #
       $courseid = $ENV{'request.course.id'} if (! defined($courseid));
       #
       my $cachefilename = $Apache::lonnet::tmpdir.$ENV{'user.name'}.'_'.
                                                   $ENV{'user.domain'}.'_'.
                                                   $courseid.'_student_data.db';
       my %cache;
       #
       my %student_data; # return values go here
       #
       my $updatetime = 0;
       my $key = &Apache::lonnet::escape($sname).':'.
                 &Apache::lonnet::escape($sdom).':';
       # Open the cache file
       if (tie(%cache,'GDBM_File',$cachefilename,&GDBM_READER(),0640)) {
           if (exists($cache{$key.'time'})) {
               $updatetime = $cache{$key.'time'};
   #            &Apache::lonnet::logthis('got updatetime of '.$updatetime);
           }
           untie(%cache);
       }
       # timestamp/devalidation 
       my $modifiedtime = 1;
       # Take whatever steps are neccessary at this point to give $modifiedtime a
       # new value
       #
       if (($updatetime < $modifiedtime) || 
           (defined($forcedownload) && $forcedownload)) {
   #        &Apache::lonnet::logthis("loading data");
           # Get all the students current data
           my $time_of_retrieval = time;
           my @tmp = &Apache::lonnet::currentdump($courseid,$sdom,$sname);
           if ((scalar(@tmp) > 0) && ($tmp[0] =~ /^error:/)) {
               &Apache::lonnet::logthis('error getting data for '.
                                        $sname.':'.$sdom.' in course '.$courseid.
                                        ':'.$tmp[0]);
               return ();
           }
           %student_data = @tmp;
           #
           # Store away the data
           #
           # The cache structure is colon deliminated.  
           # $uname:$udom:time  => timestamp
           # $uname:$udom:$symb => $parm1:$val1:$parm2:$val2 ...
           #
           # BEWARE: The colons are NOT escaped so can search with escaped 
           #         keys instead of unescaping every key.
           #
           if (tie(%cache,'GDBM_File',$cachefilename,&GDBM_WRCREAT(),0640)) {
   #            &Apache::lonnet::logthis("writing data");
               while (my ($current_symb,$param_hash) = each(%student_data)) {
                   my @Parameters = %{$param_hash};
                   my $value = join(':',map { &Apache::lonnet::escape($_); } 
                                    @Parameters);
                   # Store away the values
                   $cache{$key.&Apache::lonnet::escape($current_symb)}=$value;
               }
               $cache{$key.'time'}=$time_of_retrieval;
               untie(%cache);
           }
       } else {
           &Apache::lonnet::logthis('retrieving cached data ');
           if (tie(%cache,'GDBM_File',$cachefilename,&GDBM_READER(),0640)) {
               if (defined($symb)) {
                   my  $searchkey = $key.&Apache::lonnet::escape($symb);
                   if (exists($cache{$searchkey})) {
                       $student_data{$symb} = &make_into_hash($cache{$searchkey});
                   }
               } else {
                   my $searchkey = '^'.$key.'(.*)$';#'
                   while (my ($testkey,$params)=each(%cache)) {
                       if ($testkey =~ /$searchkey/) { # \Q \E?  May be necc.
                           my $tmpsymb = $1;
                           next if ($tmpsymb =~ 'time');
   #                        &Apache::lonnet::logthis('found '.$tmpsymb.':');
                           $student_data{&Apache::lonnet::unescape($tmpsymb)} = 
                               &make_into_hash($params);
                       }
                   }
               }
               untie(%cache);
           }
       }
       if (! defined($symb)) {
   #        &Apache::lonnet::logthis("returning all data");
           return %student_data;
       } elsif (exists($student_data{$symb})) {
   #        &Apache::lonnet::logthis("returning data for symb=".$symb);
           return %{$student_data{$symb}};
       } else {
           return ();
       }
   }
   
 ################################################  ################################################
 ################################################  ################################################
   
Removed from v.1.43  
changed lines
  Added in v.1.49

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