version 1.6, 2004/03/08 19:12:18
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version 1.11, 2004/04/01 22:13:39
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Line 59 use Apache::lonlocal;
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Line 59 use Apache::lonlocal;
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use HTML::Entities(); |
use HTML::Entities(); |
use Time::Local(); |
use Time::Local(); |
use Spreadsheet::WriteExcel(); |
use Spreadsheet::WriteExcel(); |
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use GDBM_File; |
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use Storable qw(freeze thaw); |
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#################################################### |
#################################################### |
#################################################### |
#################################################### |
Line 343 sub get_prev_curr_next {
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Line 345 sub get_prev_curr_next {
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=pod |
=pod |
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=item GetStudentAnswers($r,$problem,$Students) |
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Determines the correct answer for a set of students on a given problem. |
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The students answers are stored in the student hashes pointed to by the |
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array @$Students under the key 'answer'. |
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Inputs: $r |
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$problem: hash reference containing the keys 'resource', 'part', and 'respid'. |
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$Students: reference to array containing student hashes (need 'username', |
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'domain'). |
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Returns: nothing |
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=cut |
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##################################################### |
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##################################################### |
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sub GetStudentAnswers { |
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my ($r,$problem,$Students) = @_; |
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my $c = $r->connection(); |
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my %Answers; |
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my ($resource,$partid,$respid) = ($problem->{'resource'}, |
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$problem->{'part'}, |
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$problem->{'respid'}); |
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# Read in the cache (if it exists) before we start timing things. |
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&Apache::lonstathelpers::ensure_proper_cache($resource->{'symb'}); |
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# Open progress window |
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my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin |
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($r,'Student Answer Compilation Status', |
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'Student Answer Compilation Progress', scalar(@$Students)); |
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$r->rflush(); |
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foreach my $student (@$Students) { |
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last if ($c->aborted()); |
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my $sname = $student->{'username'}; |
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my $sdom = $student->{'domain'}; |
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my $answer = &Apache::lonstathelpers::analyze_problem_as_student |
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($resource,$sname,$sdom,$partid,$respid); |
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&Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state, |
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&mt('last student')); |
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$student->{'answer'} = $answer; |
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} |
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&Apache::lonstathelpers::write_answer_cache(); |
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return if ($c->aborted()); |
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$r->rflush(); |
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# close progress window |
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&Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state); |
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return; |
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} |
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##################################################### |
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##################################################### |
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=pod |
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=item analyze_problem_as_student |
=item analyze_problem_as_student |
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Analyzes a homework problem for a student and returns the correct answer |
Analyzes a homework problem for a student and returns the correct answer |
Line 369 sub analyze_problem_as_student {
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Line 425 sub analyze_problem_as_student {
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my $returnvalue; |
my $returnvalue; |
my $url = $resource->{'src'}; |
my $url = $resource->{'src'}; |
my $symb = $resource->{'symb'}; |
my $symb = $resource->{'symb'}; |
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my $answer = &get_from_answer_cache($sname,$sdom,$symb,$partid,$respid); |
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if (defined($answer)) { |
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return($answer); |
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} |
my $courseid = $ENV{'request.course.id'}; |
my $courseid = $ENV{'request.course.id'}; |
my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze', |
my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze', |
'grade_domain' => $sdom, |
'grade_domain' => $sdom, |
Line 378 sub analyze_problem_as_student {
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Line 438 sub analyze_problem_as_student {
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(my $garbage,$Answ)=split(/_HASH_REF__/,$Answ,2); |
(my $garbage,$Answ)=split(/_HASH_REF__/,$Answ,2); |
my %Answer=&Apache::lonnet::str2hash($Answ); |
my %Answer=&Apache::lonnet::str2hash($Answ); |
# |
# |
if (! defined($partid)) { |
undef($answer); |
# If you do not specify a partid, you get them all. |
foreach my $partid (@{$resource->{'parts'}}) { |
foreach my $partid (@{$resource->{'parts'}}) { |
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my $partdata = $resource->{'partdata'}->{$partid}; |
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foreach my $respid (@{$partdata->{'ResponseIds'}}) { |
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my $prefix = $partid.'.'.$respid; |
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my $key = $prefix.'.answer'; |
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$returnvalue->{$key} = &get_answer($prefix,$key,%Answer); |
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} |
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} |
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} elsif (! defined($respid)) { |
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my $partdata = $resource->{'partdata'}->{$partid}; |
my $partdata = $resource->{'partdata'}->{$partid}; |
foreach my $respid (@{$partdata->{'ResponseIds'}}) { |
foreach my $respid (@{$partdata->{'ResponseIds'}}) { |
my $prefix = $partid.'.'.$respid; |
my $prefix = $partid.'.'.$respid; |
my $key = $prefix.'.answer'; |
my $key = $prefix.'.answer'; |
$returnvalue->{$key} = &get_answer($prefix,$key,%Answer); |
$answer->{$partid}->{$respid} = &get_answer($prefix,$key,%Answer); |
} |
} |
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} |
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&store_answer($sname,$sdom,$symb,undef,undef,$answer); |
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if (! defined($partid)) { |
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$returnvalue = $answer; |
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} elsif (! defined($respid)) { |
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$returnvalue = $answer->{$partid}; |
} else { |
} else { |
my $prefix = $partid.'.'.$respid; |
$returnvalue = $answer->{$partid}->{$respid}; |
my $key = $prefix.'.answer'; |
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$returnvalue = &get_answer($prefix,$key,%Answer); |
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} |
} |
return $returnvalue; |
return $returnvalue; |
} |
} |
Line 423 sub get_answer {
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Line 478 sub get_answer {
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} |
} |
foreach my $foil (@{$Answer{$prefix.'.shown'}}) { |
foreach my $foil (@{$Answer{$prefix.'.shown'}}) { |
if (ref($values{$foil}) eq 'ARRAY') { |
if (ref($values{$foil}) eq 'ARRAY') { |
$returnvalue.=&HTML::Entities::encode($foil).'='. |
$returnvalue.=&HTML::Entities::encode($foil,'<>&"').'='. |
join(',',map {&HTML::Entities::encode($_)} @{$values{$foil}}).'&'; |
join(',',map {&HTML::Entities::encode($_,'<>&"')} @{$values{$foil}}).'&'; |
} else { |
} else { |
$returnvalue.=&HTML::Entities::encode($foil).'='. |
$returnvalue.=&HTML::Entities::encode($foil,'<>&"').'='. |
&HTML::Entities::encode($values{$foil}).'&'; |
&HTML::Entities::encode($values{$foil},'<>&"').'&'; |
} |
} |
} |
} |
$returnvalue =~ s/ /\%20/g; |
$returnvalue =~ s/ /\%20/g; |
Line 437 sub get_answer {
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Line 492 sub get_answer {
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return $returnvalue; |
return $returnvalue; |
} |
} |
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##################################################### |
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##################################################### |
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=pod |
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=item Caching routines |
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=over 4 |
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=item &load_answer_cache($symb) |
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Loads the cache for the given symb into memory from disk. |
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Requires the cache filename be set. |
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Only should be called by &ensure_proper_cache. |
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=cut |
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##################################################### |
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##################################################### |
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{ |
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my $cache_filename = undef; |
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my $current_symb = undef; |
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my %cache; |
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sub load_answer_cache { |
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my ($symb) = @_; |
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return if (! defined($cache_filename)); |
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if (! defined($current_symb) || $current_symb ne $symb) { |
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undef(%cache); |
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my $storedstring; |
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my %cache_db; |
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if (tie(%cache_db,'GDBM_File',$cache_filename,&GDBM_READER(),0640)) { |
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$storedstring = $cache_db{&Apache::lonnet::escape($symb)}; |
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untie(%cache_db); |
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} |
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if (defined($storedstring)) { |
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%cache = %{thaw($storedstring)}; |
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} |
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} |
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return; |
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} |
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##################################################### |
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##################################################### |
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=pod |
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=item &get_from_answer_cache($sname,$sdom,$symb,$partid,$respid) |
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Returns the appropriate data from the cache, or undef if no data exists. |
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If $respid is undefined, a hash ref containing the answers for the given |
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$partid is returned. If $partid is undefined, a hash ref containing answers |
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for all of the parts is returned. |
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=cut |
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##################################################### |
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##################################################### |
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sub get_from_answer_cache { |
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my ($sname,$sdom,$symb,$partid,$respid) = @_; |
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&ensure_proper_cache($symb); |
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my $returnvalue; |
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if (exists($cache{$sname.':'.$sdom}) && |
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ref($cache{$sname.':'.$sdom}) eq 'HASH') { |
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if (defined($partid) && |
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exists($cache{$sname.':'.$sdom}->{$partid})) { |
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if (defined($respid) && |
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exists($cache{$sname.':'.$sdom}->{$partid}->{$respid})) { |
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$returnvalue = $cache{$sname.':'.$sdom}->{$partid}->{$respid}; |
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} else { |
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$returnvalue = $cache{$sname.':'.$sdom}->{$partid}; |
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} |
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} else { |
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$returnvalue = $cache{$sname.':'.$sdom}; |
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} |
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} else { |
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$returnvalue = undef; |
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} |
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return $returnvalue; |
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} |
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##################################################### |
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##################################################### |
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=pod |
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=item &write_answer_cache($symb) |
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Writes the in memory cache to disk so that it can be read in with |
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&load_answer_cache($symb). |
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=cut |
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##################################################### |
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##################################################### |
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sub write_answer_cache { |
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return if (! defined($current_symb) || ! defined($cache_filename)); |
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my %cache_db; |
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my $key = &Apache::lonnet::escape($current_symb); |
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if (tie(%cache_db,'GDBM_File',$cache_filename,&GDBM_WRCREAT(),0640)) { |
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my $storestring = freeze(\%cache); |
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$cache_db{$key}=$storestring; |
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$cache_db{$key.'.time'}=time; |
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untie(%cache_db); |
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} |
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undef(%cache); |
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undef($current_symb); |
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undef($cache_filename); |
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return; |
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} |
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##################################################### |
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##################################################### |
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=pod |
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=item &ensure_proper_cache($symb) |
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Called to make sure we have the proper cache set up. This is called |
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prior to every answer lookup. |
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=cut |
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##################################################### |
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##################################################### |
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sub ensure_proper_cache { |
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my ($symb) = @_; |
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my $cid = $ENV{'request.course.id'}; |
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my $new_filename = '/home/httpd/perl/tmp/'. |
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'problemanalsysis_'.$cid.'answer_cache.db'; |
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if (! defined($cache_filename) || |
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$cache_filename ne $new_filename || |
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! defined($current_symb) || |
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$current_symb ne $symb) { |
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$cache_filename = $new_filename; |
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# Notice: $current_symb is not set to $symb until after the cache is |
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# loaded. This is what tells &load_answer_cache to load in a new |
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# symb cache. |
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&load_answer_cache($symb); |
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$current_symb = $symb; |
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} |
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} |
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##################################################### |
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##################################################### |
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=pod |
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=item &store_answer($sname,$sdom,$symb,$partid,$respid,$dataset) |
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Stores the answer data in the in memory cache. |
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=cut |
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##################################################### |
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##################################################### |
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sub store_answer { |
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my ($sname,$sdom,$symb,$partid,$respid,$dataset) = @_; |
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return if ($symb ne $current_symb); |
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if (defined($partid)) { |
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if (defined($respid)) { |
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$cache{$sname.':'.$sdom}->{$partid}->{$respid} = $dataset; |
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} else { |
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$cache{$sname.':'.$sdom}->{$partid} = $dataset; |
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} |
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} else { |
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$cache{$sname.':'.$sdom}=$dataset; |
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} |
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return; |
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} |
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} |
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##################################################### |
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##################################################### |
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=pod |
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=back |
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=cut |
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##################################################### |
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##################################################### |
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## |
## |
## The following is copied from datecalc1.pl, part of the |
## The following is copied from datecalc1.pl, part of the |
## Spreadsheet::WriteExcel CPAN module. |
## Spreadsheet::WriteExcel CPAN module. |
Line 644 sub get_problem_data {
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Line 884 sub get_problem_data {
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while (my($key,$value) = each(%Answer)) { |
while (my($key,$value) = each(%Answer)) { |
# |
# |
# Logging code: |
# Logging code: |
if (1) { |
if (0) { |
&Apache::lonnet::logthis($part.' got key "'.$key.'"'); |
&Apache::lonnet::logthis($part.' got key "'.$key.'"'); |
if (ref($value) eq 'ARRAY') { |
if (ref($value) eq 'ARRAY') { |
&Apache::lonnet::logthis(' @'.join(',',@$value)); |
&Apache::lonnet::logthis(' @'.join(',',@$value)); |
Line 761 sub get_time_limits {
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Line 1001 sub get_time_limits {
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return ($starttime,$endtime); |
return ($starttime,$endtime); |
} |
} |
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#################################################### |
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#################################################### |
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=pod |
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=item sections_description |
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Inputs: @Sections, an array of sections |
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Returns: A text description of the sections selected. |
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=cut |
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#################################################### |
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#################################################### |
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sub sections_description { |
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my @Sections = @_; |
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my $sectionstring = ''; |
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if (scalar(@Sections) > 1) { |
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if (scalar(@Sections) > 2) { |
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my $last = pop(@Sections); |
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$sectionstring = "Sections ".join(', ',@Sections).', and '.$last; |
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} else { |
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$sectionstring = "Sections ".join(' and ',@Sections); |
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} |
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} else { |
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if ($Sections[0] eq 'all') { |
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$sectionstring = "All sections"; |
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} else { |
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$sectionstring = "Section ".$Sections[0]; |
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} |
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} |
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return $sectionstring; |
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} |
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#################################################### |
#################################################### |
#################################################### |
#################################################### |
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