#
# $Id: studentcalc.pm,v 1.34 2005/08/05 20:06:22 albertel Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#
# The LearningOnline Network with CAPA
# Spreadsheet/Grades Display Handler
#
# POD required stuff:
=head1 NAME
studentcalc
=head1 SYNOPSIS
=head1 DESCRIPTION
=over 4
=cut
###################################################
### StudentSheet ###
###################################################
package Apache::studentcalc;
use warnings FATAL=>'all';
no warnings 'uninitialized';
use strict;
use Apache::Constants qw(:common :http);
use Apache::lonnet;
use Apache::loncommon();
use Apache::loncoursedata();
use Apache::lonnavmaps;
use Apache::Spreadsheet();
use Apache::assesscalc();
use HTML::Entities();
use Time::HiRes;
use Apache::lonlocal;
@Apache::studentcalc::ISA = ('Apache::Spreadsheet');
my @Sequences = ();
my $navmap;
my %Exportrows = ();
my $current_course;
sub initialize {
&initialize_sequence_cache();
&Apache::assesscalc::initialize($navmap);
}
sub initialize_package {
$current_course = $env{'request.course.id'};
&initialize_sequence_cache();
&load_cached_export_rows();
}
sub ensure_correct_sequence_data {
if ($current_course ne $env{'request.course.id'}) {
&initialize_sequence_cache();
$current_course = $env{'request.course.id'};
}
return;
}
sub initialize_sequence_cache {
#
# Set up the sequences and assessments
undef(@Sequences);
undef($navmap);
$navmap = Apache::lonnavmaps::navmap->new();
if (!defined($navmap)) {
&Apache::lonnet::logthis('student spreadsheet:Can not open Coursemap');
}
my @all_sequences = $navmap->retrieveResources(undef,
sub { shift->is_map(); },1,0,1);
for my $sequence ($navmap->getById('0.0'), @all_sequences) {
if ($navmap->hasResource($sequence,sub { shift->is_problem(); }, 0)){
push(@Sequences,$sequence);
&get_resources($sequence);
}
}
}
my %res_memoize;
sub get_resources {
my ($seq) = @_;
if (exists($res_memoize{$seq->symb()})) {
return @{$res_memoize{$seq->symb()}};
}
return () if (! defined($navmap) || ! ref($navmap));
my @resources = $navmap->retrieveResources($seq,
sub { shift->is_problem(); },
0,0,0);
$res_memoize{$seq->symb()}=\@resources;
return @resources;
}
sub clear_package {
undef(@Sequences);
undef(%Exportrows);
undef(%res_memoize);
undef($navmap);
&Apache::assesscalc::clear_package();
}
sub get_title {
my $self = shift;
my @title = ();
#
# Determine the students name
my $name = &Apache::loncommon::plainname($self->{'name'},
$self->{'domain'});
push (@title,$name);
push (@title,$self->{'coursedesc'});
push (@title,&Apache::lonlocal::locallocaltime(time));
return @title;
}
sub get_html_title {
my $self = shift;
my ($name,$desc,$time) = $self->get_title();
my $title = '<h1>'.$name;
if ($env{'user.name'} ne $self->{'name'} &&
$env{'user.domain'} ne $self->{'domain'}) {
$title .= ' '.&Apache::loncommon::aboutmewrapper
($self->{'name'}.'@'.$self->{'domain'},
$self->{'name'},$self->{'domain'});
}
$title .= "</h1>\n";
$title .= '<h2>'.$desc."</h2>\n";
$title .= '<h3>'.$time.'</h3>';
return $title;
}
sub parent_link {
my $self = shift;
return '<p><a href="/adm/classcalc">'.&mt('Course level sheet').'</a></p>'."\n";
}
sub convenience_links {
my $self = shift;
my ($resource) = @_;
my $result=&Apache::loncommon::submlink('<img src="/adm/lonMisc/subm_button.gif" border="0" />',$self->{'name'},$self->{'domain'},$resource->symb,'LONcatInfo');
$result .= &Apache::loncommon::pgrdlink('<img src="/adm/lonMisc/pgrd_button.gif" border="0" />',$self->{'name'},$self->{'domain'},$resource->symb,'LONcatInfo');
$result .= &Apache::loncommon::pprmlink('<img src="/adm/lonMisc/pprm_button.gif" border="0" />',$self->{'name'},$self->{'domain'},$resource->symb,'LONcatInfo');
return $result;
}
sub outsheet_html {
my $self = shift;
my ($r) = @_;
my $importcolor = '#FFFFAA';
my $exportcolor = '#88FF88';
####################################
# Get the list of assessment files #
####################################
my @AssessFileNames = $self->othersheets('assesscalc');
my $editing_is_allowed = &Apache::lonnet::allowed('mgr',
$env{'request.course.id'});
####################################
# Report any calculation errors #
####################################
$r->print($self->html_report_error());
####################################
# Determine table structure #
####################################
my $num_uneditable = 26;
my $num_left = 52-$num_uneditable;
my %lt=&Apache::lonlocal::texthash(
'st' => 'Student',
'im' => 'Import',
'ca' => 'Calculations',
'as' => 'Assessment',
'ro' => 'Row',
);
my $tableheader =<<"END";
<p>
<table border="2">
<tr>
<th colspan="2" rowspan="2"><font size="+2">$lt{'st'}</font></th>
<td bgcolor="$importcolor" colspan="$num_uneditable">
<b><font size="+1">$lt{'im'}</font></b></td>
<td colspan="$num_left">
<b><font size="+1">$lt{'ca'}</font></b></td>
</tr><tr>
END
my $label_num = 0;
foreach (split(//,'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz')){
if ($label_num<$num_uneditable) {
$tableheader .='<td bgcolor="'.$importcolor.'">';
} else {
$tableheader .='<td>';
}
$tableheader .="<b><font size=+1>$_</font></b></td>";
$label_num++;
}
$tableheader .="</tr>\n";
if ($self->blackout()) {
$r->print('<font color="red" size="+2"><p>'.
&mt('Some computations are not available at this time.').'<br />'.
&mt('There are problems whose status you are not allowed to view.').
'</font></p>'."\n");
} else {
$r->print($tableheader);
#
# Print out template row
if (exists($env{'request.role.adv'}) && $env{'request.role.adv'}) {
$r->print('<tr><td>Template</td><td> </td>'.
$self->html_template_row($num_uneditable,
$importcolor)."</tr>\n");
}
#
# Print out summary/export row
$r->print('<tr><td>'.&mt('Summary').'</td><td>0</td>'.
$self->html_export_row($exportcolor)."</tr>\n");
}
$r->print("</table>\n");
#
# Prepare to output rows
if (exists($env{'request.role.adv'}) && $env{'request.role.adv'}) {
$tableheader =<<"END";
</p><p>
<table border="2">
<tr><th>$lt{'ro'}</th><th> </th><th>$lt{'as'}</th>
END
} else {
$tableheader =<<"END";
</p><p>
<table border="2">
<tr><th> </th><th>$lt{'as'}</th>
END
}
foreach (split(//,'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz')){
if ($label_num<$num_uneditable) {
$tableheader.='<td bgcolor="#FFDDDD">';
} else {
$tableheader.='<td>';
}
$tableheader.="<b><font size=+1>$_</font></b></td>";
}
$tableheader.="\n";
#
my $num_output = 1;
if (scalar(@Sequences)< 1) {
&initialize_sequence_cache();
}
foreach my $Sequence (@Sequences) {
$r->print("<h3>".$Sequence->compTitle."</h3>\n");
$r->print($tableheader);
foreach my $resource (&get_resources($Sequence)) {
my $rownum = $self->get_row_number_from_key($resource->symb);
my $assess_filename = $self->{'row_source'}->{$rownum};
my $row_output = '<tr>';
if ($editing_is_allowed) {
$row_output .= '<td>'.$rownum.'</td>';
$row_output .= '<td>'.$self->convenience_links($resource).'</td>';
$row_output .= '<td>'.
'<a href="/adm/assesscalc?sname='.$self->{'name'}.
'&sdomain='.$self->{'domain'}.
'&filename='.$assess_filename.
'&usymb='.&Apache::lonnet::escape($resource->symb).
'">'.$resource->compTitle.'</a><br />';
$row_output .= &assess_file_selector($rownum,
$assess_filename,
\@AssessFileNames).
'</td>';
} else {
$row_output .= '<td><a href="'.$resource->src.'?symb='.
&Apache::lonnet::escape($resource->symb).
'">Go To</a>';
$row_output .= '</td><td>'.$resource->compTitle.'</td>';
}
if ($self->blackout() && $self->{'blackout_rows'}->{$rownum}>0) {
$row_output .=
'<td colspan="52">'.&mt('Unavailable at this time').'</td></tr>'."\n";
} else {
$row_output .= $self->html_row($num_uneditable,$rownum,
$exportcolor,$importcolor).
"</tr>\n";
}
$r->print($row_output);
}
$r->print("</table>\n");
}
$r->print("</p>\n");
return;
}
########################################################
########################################################
=pod
=item &assess_file_selector()
=cut
########################################################
########################################################
sub assess_file_selector {
my ($row,$default,$AssessFiles)=@_;
if (!defined($AssessFiles) || ! @$AssessFiles) {
return '';
}
return '' if (! &Apache::lonnet::allowed('mgr',$env{'request.course.id'}));
my $element_name = 'FileSelect_'.$row;
my $load_dialog = '<select size="1" name="'.$element_name.'" '.
'onchange="'.
"document.sheet.cell.value='source_$row';".
"document.sheet.newformula.value=document.sheet.$element_name\.value;".
'document.sheet.submit()" '.'>'."\n";
foreach my $file (@{$AssessFiles}) {
$load_dialog .= ' <option name="'.$file.'"';
$load_dialog .= ' selected' if ($default eq $file);
$load_dialog .= '>'.$file."</option>\n";
}
$load_dialog .= "</select>\n";
return $load_dialog;
}
sub modify_cell {
my $self = shift;
my ($cell,$formula) = @_;
if ($cell =~ /^source_(\d+)$/) {
# Need to make sure $formula is a valid filename....
my $row = $1;
$cell = 'A'.$row;
$self->{'row_source'}->{$row} = $formula;
my $original_source = $self->formula($cell);
if ($original_source =~ /__&&&__/) {
($original_source,undef) = split('__&&&__',$original_source);
}
$formula = $original_source.'__&&&__'.$formula;
} elsif ($cell =~ /([A-z])\-/) {
$cell = 'template_'.$1;
} elsif ($cell !~ /^([A-z](\d+)|template_[A-z])$/) {
return;
}
$self->set_formula($cell,$formula);
$self->rebuild_stats();
return;
}
sub csv_rows {
# writes the meat of the spreadsheet to an excel worksheet. Called
# by Spreadsheet::outsheet_excel;
my $self = shift;
my ($connection,$filehandle) = @_;
#
# Write a header row
$self->csv_output_row($filehandle,undef,
(&mt('Sequence or Folder'),&mt('Assessment title')));
#
# Write each assessments row
if (scalar(@Sequences)< 1) {
&initialize_sequence_cache();
}
foreach my $Sequence (@Sequences) {
foreach my $resource (&get_resources($Sequence)) {
my $rownum = $self->get_row_number_from_key($resource->symb);
my @assessdata = ($Sequence->compTitle,
$resource->compTitle);
$self->csv_output_row($filehandle,$rownum,@assessdata);
}
}
return;
}
sub excel_rows {
# writes the meat of the spreadsheet to an excel worksheet. Called
# by Spreadsheet::outsheet_excel;
my $self = shift;
my ($connection,$worksheet,$cols_output,$rows_output,$format) = @_;
#
# Write a header row
$cols_output = 0;
foreach my $value ('Container','Assessment title') {
$worksheet->write($rows_output,$cols_output++,&mt($value),$format->{'h4'});
}
$rows_output++;
#
# Write each assessments row
if (scalar(@Sequences)< 1) {
&initialize_sequence_cache();
}
foreach my $Sequence (@Sequences) {
foreach my $resource (&get_resources($Sequence)) {
my $rownum = $self->get_row_number_from_key($resource->symb);
my @assessdata = ($Sequence->compTitle,
$resource->compTitle);
$self->excel_output_row($worksheet,$rownum,$rows_output++,
@assessdata);
}
}
return;
}
sub outsheet_recursive_excel {
my $self = shift;
my ($r) = @_;
}
##
## Routines to deal with sequences in the safe space
##
sub get_rows_in_sequence {
my $self = shift();
my ($sequence) = @_;
my @Rows;
my @resources = &get_resources($sequence);
foreach my $resource (@resources) {
my $rownum = $self->get_row_number_from_key($resource->symb);
push (@Rows,$rownum);
}
return @Rows;
}
sub remove_sequence_data_from_safe_space {
my $self = shift();
my $command = 'undef(%Sequence_Rows);';
$self->{'safe'}->reval($command);
}
sub put_sequence_data_in_safe_space {
my $self = shift();
my $data = 'undef(%Sequence_Rows);';
# Build up the %Sequence_Rows hash - each sequence title is associated with
# an array pointer, which holds the rows in the sequence.
foreach my $seq (@Sequences) {
my @Rows = $self->get_rows_in_sequence($seq);
#
# Potential problems with sequence titles:
# 1. duplicate titles - they get the total for the titles
# 2. control characters in titles - use q{} around the string to
# deal with it.
my $title = &HTML::Entities::decode($seq->title());
$title =~ s/&\#058;/:/g;
if (@Rows) {
$data .= 'push(@{$Sequence_Rows{"'.quotemeta($title).'"}},'.
'('.join(',',@Rows).'));'."\n";;
}
}
my $new_code = $data.<<'END';
sub SUMSEQ {
my ($col,@titles) = @_;
return 'bad column: '.$col if ($col !~ /^[A-z]$/);
my $sum = 0;
foreach my $title (@titles) {
while (my ($seq_title,$rows) = each(%Sequence_Rows)) {
my $regexp;
if ($title =~ /^regexp:(.*)$/) {
$regexp = $1;
} elsif (lc($title) eq 'all') {
$regexp = '.';
}
if (defined($regexp)) {
next if ($seq_title !~ /$regexp/);
} else {
next if ($seq_title ne $title);
}
foreach my $rownum (@{$rows}) {
my $cell = $col.$rownum;
if (exists($sheet_values{$cell})) {
$sum += $sheet_values{$cell};
}
}
}
}
return $sum;
}
END
$self->{'safe'}->reval($new_code);
return;
}
##
## Main computation method
##
sub compute {
my $self = shift;
my ($r) = @_;
if (! defined($current_course) ||
$current_course ne $env{'request.course.id'} ||
! @Sequences ) {
$current_course = $env{'request.course.id'};
&clear_package();
&initialize_sequence_cache();
}
$self->initialize_safe_space();
&Apache::assesscalc::initialize_package($self->{'name'},$self->{'domain'},
$navmap);
my %f = $self->formulas();
#
# Process the formulas list -
# the formula for the A column of a row is symb__&&__filename
my %c = $self->constants();
foreach my $seq (@Sequences) {
foreach my $resource (&get_resources($seq)) {
my $rownum = $self->get_row_number_from_key($resource->symb);
my $cell = 'A'.$rownum;
my $assess_filename = 'Default';
if (exists($self->{'row_source'}->{$rownum})) {
$assess_filename = $self->{'row_source'}->{$rownum};
} else {
$self->{'row_source'}->{$rownum} = $assess_filename;
}
$f{$cell} = $resource->symb.'__&&&__'.$assess_filename;
my $assessSheet;
$assessSheet = Apache::assesscalc->new($self->{'name'},
$self->{'domain'},
$assess_filename,
$resource->symb);
my @exportdata = $assessSheet->export_data($r);
#
if ($assessSheet->badcalc()) {
$self->set_calcerror(
&mt('Error computing row for assessment "[_1]" (row [_2]):[_3]',
$assessSheet->get_title(),$rownum,$assessSheet->calcerror()));
}
#
if ($assessSheet->blackout()) {
$self->blackout(1);
$self->{'blackout_rows'}->{$rownum} = 1;
}
#
# Be sure not to disturb the formulas in the 'A' column
my $data = shift(@exportdata);
$c{$cell} = $data if (defined($data));
#
# Deal with the remaining columns
my $i=0;
foreach (split(//,'BCDEFGHIJKLMNOPQRSTUVWXYZ')) {
my $cell = $_.$rownum;
my $data = shift(@exportdata);
if (defined($data)) {
$f{$cell} = 'import';
$c{$cell} = $data;
}
$i++;
}
}
}
$self->constants(\%c);
$self->formulas(\%f);
$self->put_sequence_data_in_safe_space();
$self->calcsheet();
$self->remove_sequence_data_from_safe_space();
#
# Store export row in cache
my @exportarray=$self->exportrow();
my $student = $self->{'name'}.':'.$self->{'domain'};
$Exportrows{$student}->{'time'} = time;
$Exportrows{$student}->{'data'} = \@exportarray;
# save export row
$self->save_export_data();
#
$self->save() if ($self->need_to_save());
return;
}
sub set_row_sources {
my $self = shift;
while (my ($cell,$value) = each(%{$self->{'formulas'}})) {
next if ($cell !~ /^A(\d+)$/ || $1 < 1);
my $row = $1;
(undef,$value) = split('__&&&__',$value);
$value = 'Default' if (! defined($value));
$self->{'row_source'}->{$row} = $value;
}
return;
}
sub set_row_numbers {
my $self = shift;
while (my ($cell,$formula) = each(%{$self->{'formulas'}})) {
next if ($cell !~ /^A(\d+)/);
my $row = $1;
next if ($row == 0);
my ($symb,undef) = split('__&&&__',$formula);
$self->{'row_numbers'}->{$symb} = $row;
$self->{'maxrow'} = $row if ($row > $self->{'maxrow'});
}
}
sub get_row_number_from_symb {
my $self = shift;
my ($key) = @_;
($key,undef) = split('__&&&__',$key) if ($key =~ /__&&&__/);
return $self->get_row_number_from_key($key);
}
#############################################
#############################################
=pod
=item &load_cached_export_rows
Retrieves and parsers the export rows of the student spreadsheets.
These rows are saved in the courses directory in the format:
sname:sdom:studentcalc:.time => time
sname:sdom:studentcalc => ___=___Adata___;___Bdata___;___Cdata___;___ .....
=cut
#############################################
#############################################
sub load_cached_export_rows {
undef(%Exportrows);
my @tmp = &Apache::lonnet::dump('nohist_calculatedsheets',
$env{'course.'.$env{'request.course.id'}.'.domain'},
$env{'course.'.$env{'request.course.id'}.'.num'},undef);
my %Selected_Assess_Sheet;
if ($tmp[0] =~ /^error/) {
&Apache::lonnet::logthis('unable to read cached student export rows '.
'for course '.$env{'request.course.id'});
return;
}
my %tmp = @tmp;
while (my ($key,$sheetdata) = each(%tmp)) {
my ($sname,$sdom,$sheettype,$remainder) = split(':',$key);
my $student = $sname.':'.$sdom;
if ($remainder =~ /\.time/) {
$Exportrows{$student}->{'time'} = $sheetdata;
} else {
$sheetdata =~ s/^___=___//;
my @Data = split('___;___',$sheetdata);
$Exportrows{$student}->{'data'} = \@Data;
}
}
}
#############################################
#############################################
=pod
=item &save_export_data()
Writes the export data for this student to the course cache.
=cut
#############################################
#############################################
sub save_export_data {
my $self = shift;
my $student = $self->{'name'}.':'.$self->{'domain'};
return if ($self->temporary());
if ($self->badcalc()){
# do not save data away when calculations have not been done properly.
delete($Exportrows{$student});
return;
}
return if (! exists($Exportrows{$student}));
&Apache::assesscalc::save_cached_export_rows($self->{'name'},
$self->{'domain'});
return if (! $self->is_default());
my $key = join(':',($self->{'name'},$self->{'domain'},'studentcalc')).':';
my $timekey = $key.'.time';
my $newstore = join('___;___',
@{$Exportrows{$student}->{'data'}});
$newstore = '___=___'.$newstore;
my $result= &Apache::lonnet::put('nohist_calculatedsheets',
{ $key => $newstore,
$timekey => $Exportrows{$student}->{'time'} },
$self->{'cdom'},
$self->{'cnum'});
return;
}
#############################################
#############################################
=pod
=item &export_data()
Returns the export data associated with the spreadsheet. Computes the
spreadsheet only if necessary.
=cut
#############################################
#############################################
sub export_data {
my $self = shift;
my ($r) = @_;
my $connection = $r->connection();
my $student = $self->{'name'}.':'.$self->{'domain'};
if (! exists($Exportrows{$student}) ||
! defined($Exportrows{$student}) ||
! exists($Exportrows{$student}->{'data'}) ||
! defined($Exportrows{$student}->{'data'}) ||
! exists($Exportrows{$student}->{'time'}) ||
! defined($Exportrows{$student}->{'time'}) ||
! $self->check_expiration_time($Exportrows{$student}->{'time'})) {
$self->compute($r);
}
if ($connection->aborted()) { $self->cleanup(); return; }
my @Data;
if ($self->badcalc()) {
@Data = ();
} else {
@Data = @{$Exportrows{$student}->{'data'}};
for (my $i=0; $i<=$#Data;$i++) {
if ($Data[$i]=~/\D/ && defined($Data[$i])) {
$Data[$i]="'".$Data[$i]."'";
}
}
}
return @Data;
}
1;
__END__
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