Return to studentcalc.pm CVS log

Up to [LON-CAPA] / loncom / interface / spreadsheet

Added 'blackout' support.  A blackout occurs when an assessment has a part
flagged with 'problemstatus' equal to 'no'.  This prevents the display of
the students performance on the part until the answerdate has passed.

Spreadsheet.pm contains &blackout, which returns the blackout status of
the current spreadsheet.

assesscalc.pm contains code which
    a) causes the computation of the spreadsheet to determine the
       blackout status
    b) forces the recomputation of the spreadsheet if the user is a student.
  Obviously (b) is less than ideal and a new approach should be found.

studentcalc.pm's outsheet_html subroutine now supresses the display of the
export (aka 'summary') row, as well as the rows of any assessments which
are under blackout.

#
# $Id: studentcalc.pm,v 1.4 2003/05/22 21:16:35 matthew 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 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 Spreadsheet::WriteExcel;
use Time::HiRes;

@Apache::studentcalc::ISA = ('Apache::Spreadsheet');

my @Sequences = ();
my %Exportrows = ();

my $current_course;

sub initialize_package {
    $current_course = $ENV{'request.course.id'};
    &initialize_sequence_cache();
    &load_cached_export_rows();
}

sub initialize_sequence_cache {
    #
    # Set up the sequences and assessments
    @Sequences = ();
    my ($top,$sequences,$assessments) = 
        &Apache::loncoursedata::get_sequence_assessment_data();
    if (! defined($top) || ! ref($top)) {
        # There has been an error, better report it
        &Apache::lonnet::logthis('top is undefined (studentcalc.pm)');
        return;
    }
    @Sequences = @{$sequences} if (ref($sequences) eq 'ARRAY');
}

sub clear_package {
    @Sequences = undef;
    %Exportrows = undef;
}

sub get_title {
    my $self = shift;
    my $title = '';
    my %userenv = &Apache::loncoursedata::GetUserName($self->{'name'},
                                                      $self->{'domain'});
    &Apache::lonnet::logthis('userenv = '.join(' ',%userenv));
    my $name = 
        join(' ',@userenv{'firstname','middlename','lastname','generation'});
    $name =~ s/\s+$//;
    $title .= '<h1>'.$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";
    $title .= '<h2>'.$self->{'coursedesc'}."</h2>\n";
    $title .= '<h3>'.localtime(time).'</h3>';
    return $title;
}

sub parent_link {
    my $self = shift;
    my $link .= '<p><a href="/adm/classcalc?'.
        'sname='.$self->{'name'}.
            '&sdomain='.$self->{'domain'}.'">'.
                'Course level sheet</a></p>'."\n";
    return $link;
}

sub outsheet_html {
    my $self = shift;
    my ($r) = @_;
    ####################################
    # Get the list of assessment files #
    ####################################
    my @AssessFileNames = $self->othersheets('assesscalc');
    my $editing_is_allowed = &Apache::lonnet::allowed('mgr',
                                                $ENV{'request.course.id'});
    ####################################
    # Determine table structure        #
    ####################################
    my $num_uneditable = 26;
    my $num_left = 52-$num_uneditable;
    my $tableheader =<<"END";
<p>
<table border="2">
<tr>
  <th colspan="2" rowspan="2"><font size="+2">Student</font></th>
  <td bgcolor="#FFDDDD" colspan="$num_uneditable">
      <b><font size="+1">Import</font></b></td>
  <td colspan="$num_left">
      <b><font size="+1">Calculations</font></b></td>
</tr><tr>
END
    my $label_num = 0;
    foreach (split(//,'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz')){
        if ($label_num<$num_uneditable) { 
            $tableheader .='<td bgcolor="#FFDDDD">';
        } 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>'.
                  'Some computations are not available at this time.<br />'.
                  'There are problems whose status you are 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>&nbsp;</td>'.
                      $self->html_template_row($num_uneditable)."</tr>\n");
        }
        #
        # Print out summary/export row
        $r->print('<tr><td>Summary</td><td>0</td>'.
                  $self->html_export_row()."</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>Row</th><th>Assessment</th>
END
    } else {
        $tableheader =<<"END";
</p><p>
<table border="2">
<tr><th>&nbsp;</th><th>Assessment</th>
END
    }
    foreach (split(//,'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz')){
	if ($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 $Sequence (@Sequences) {
	next if ($Sequence->{'num_assess'} < 1);
	$r->print("<h3>".$Sequence->{'title'}."</h3>\n");
 	$r->print($tableheader);
	foreach my $resource (@{$Sequence->{'contents'}}) {
	    next if ($resource->{'type'} ne 'assessment');
	    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>';
                $row_output .= '<td>'.
                    '<a href="/adm/assesscalc?sname='.$self->{'name'}.
                    '&sdomain='.$self->{'domain'}.
                    '&filename='.$assess_filename.
                    '&usymb='.&Apache::lonnet::escape($resource->{'symb'}).
                    '">'.$resource->{'title'}.'</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&nbsp;To</a>';
                $row_output .= '</td><td>'.$resource->{'title'}.'</td>';
            }
            if ($self->blackout() && $self->{'blackout_rows'}->{$rownum}>0) {
                $row_output .= 
                    '<td colspan="52">Unavailable at this time</td></tr>'."\n";
            } else {
                $row_output .= $self->html_row($num_uneditable,$rownum).
                    "</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 outsheet_csv {
    my $self = shift;
    my ($r) = @_;
}
sub outsheet_excel {
    my $self = shift;
    my ($r) = @_;
}
sub outsheet_recursive_excel {
    my $self = shift;
    my ($r) = @_;
} 

sub display {
    my $self = shift;
    my ($r) = @_;
    $self->compute();
    $self->outsheet_html($r);
    return;
}

sub set_row_sources {
    my $self = shift;
    while (my ($cell,$value) = each(%{$self->{'formulas'}})) {
        next if ($cell !~ /^A(\d+)/ && $1 > 0);
        my $row = $1;
        (undef,$value) = split('__&&&__',$value);
        $value = 'Default' if (! defined($value));
        $self->{'row_source'}->{$row} = $value;
    }
    return;
}

sub compute {
    my $self = shift;
    $self->logthis('computing');
    if (! defined($current_course) ||
        $current_course ne $ENV{'request.course.id'}) {
        $current_course = $ENV{'request.course.id'};
        &clear_package();
        &initialize_sequence_cache();
    }
    $self->initialize_safe_space();
    my @sequences = @Sequences;
    if (@sequences < 1) {
        my ($top,$sequences,$assessments) = 
            &Apache::loncoursedata::get_sequence_assessment_data();
        if (! defined($top) || ! ref($top)) {
            &Apache::lonnet::logthis('top is undefined');
            return;
        }
        @sequences = @{$sequences} if (ref($sequences) eq 'ARRAY');
    }
    &Apache::assesscalc::initialize_package($self->{'name'},$self->{'domain'});
    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 $seq (@sequences) {
        next if ($seq->{'num_assess'}<1);
        foreach my $resource (@{$seq->{'contents'}}) {
            next if ($resource->{'type'} ne 'assessment');
            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 $assessSheet = Apache::assesscalc->new($self->{'name'},
                                                      $self->{'domain'},
                                                      $assess_filename,
                                                      $resource->{'symb'});
            my @exportdata = $assessSheet->export_data();
            if ($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);
    $self->calcsheet();
    #
    # Store export row in cache
    my @exportarray=$self->exportrow();
    my $student = $self->{'name'}.':'.$self->{'domain'};
    $Exportrows{$student}->{'time'} = time;
    $Exportrows{$student}->{'data'} = \@exportarray;
    # save export row
    $self->save_export_data();
    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;
    }
}

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 {
    %Exportrows = undef;
    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 (! exists($Exportrows{$student}));
    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;
    &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 $student = $self->{'name'}.':'.$self->{'domain'};
    if (! exists($Exportrows{$student}) ||
        ! $self->check_expiration_time($Exportrows{$student}->{'time'})) {
        $self->compute();
    }
    my @Data = @{$Exportrows{$student}->{'data'}};
    for (my $i=0; $i<=$#Data;$i++) {
        $Data[$i]="'".$Data[$i]."'" if ($Data[$i]=~/\D/ && defined($Data[$i]));
    }
    return @Data;
}

1;

__END__