'.$resource->{'title'}.'

# The LearningOnline Network with CAPA
#
# $Id: lonsurveyreports.pm,v 1.2 2004/07/06 15:56:42 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/
#
package Apache::lonsurveyreports;

use strict;
use Apache::lonnet();
use Apache::loncommon();
use Apache::lonhtmlcommon();
use Apache::loncoursedata();
use Apache::lonstatistics;
use Apache::lonlocal;
use Apache::lonstathelpers;
use HTML::Entities();
use Time::Local();

my @SubmitButtons = ({ name => 'PrevProblem',
                       text => 'Previous Survey' },
                     { name => 'NextProblem',
                       text => 'Next Survey' },
                     { name => 'break'},
                     { name => 'SelectAnother',
                       text => 'Choose a different Survey Problem' },
                     { name => 'Generate',
                       text => 'Generate Report'},
                     );

sub BuildSurveyReportsPage {
    my ($r,$c)=@_;
    #
    my %Saveable_Parameters = ('Status' => 'scalar',
                               'Section' => 'array',
                               'NumPlots' => 'scalar',
                               );
    &Apache::loncommon::store_course_settings('survey_reports',
                                              \%Saveable_Parameters);
    &Apache::loncommon::restore_course_settings('survey_resports',
                                                \%Saveable_Parameters);
    #
    &Apache::lonstatistics::PrepareClasslist();
    #
    $r->print(&CreateInterface());
    #
    my @Students = @Apache::lonstatistics::Students;
    #
    if (@Students < 1) {
        $r->print('<h2>There are no students in the sections selected</h2>');
    }
    #
    my @CacheButtonHTML = 
        &Apache::lonstathelpers::manage_caches($r,'Statistics','stats_status');
    $r->rflush();
    #
    if (exists($ENV{'form.problemchoice'}) && 
        ! exists($ENV{'form.SelectAnother'})) {
        foreach my $button (@SubmitButtons) {
            if ($button->{'name'} eq 'break') {
                $r->print("<br />\n");
            } else {
                $r->print('<input type="submit" name="'.$button->{'name'}.'" '.
                          'value="'.&mt($button->{'text'}).'" />');
                $r->print('&nbsp;'x5);
            }
        }
        foreach my $html (@CacheButtonHTML) {
            $r->print($html.('&nbsp;'x5));
        }
        #
        $r->print('<hr />');
        $r->rflush();
        #
        # Determine which problem we are to analyze
        my $current_problem = &Apache::lonstathelpers::get_target_from_id
            ($ENV{'form.problemchoice'});
        #
        my ($prev,$curr,$next) = 
            &Apache::lonstathelpers::get_prev_curr_next($current_problem,
                                                        '.',
                                                        'part_survey',
                                                        );
        if (exists($ENV{'form.PrevProblem'}) && defined($prev)) {
            $current_problem = $prev;
        } elsif (exists($ENV{'form.NextProblem'}) && defined($next)) {
            $current_problem = $next;
        } else {
            $current_problem = $curr;
        }
        #
        # Store the current problem choice and send it out in the form
        $ENV{'form.problemchoice'} = 
            &Apache::lonstathelpers::make_target_id($current_problem);
        $r->print('<input type="hidden" name="problemchoice" value="'.
                  $ENV{'form.problemchoice'}.'" />');
        #
        if (! defined($current_problem->{'resource'})) {
            $r->print('resource is undefined');
        } else {
            my $resource = $current_problem->{'resource'};
            $r->print('<h1>'.$resource->{'title'}.'</h1>');
            $r->print('<h3>'.$resource->{'src'}.'</h3>');
            $r->print(&Apache::lonstathelpers::render_resource($resource));
            $r->rflush();
            my %Data = &Apache::lonstathelpers::get_problem_data
                ($resource->{'src'});
            &make_HTML_report($r,$current_problem,\%Data,\@Students);
        }
        $r->print('<hr />');
    } else {
        $r->print('<input type="submit" name="Generate" value="'.
                  &mt('Generate Survey Report').'" />');
        $r->print('&nbsp;'x5);
        $r->print('<h3>'.&mt('Please select a Survey to analyze').'</h3>');
        $r->print(&SurveyProblemSelector());
    }
}

##########################################################
##########################################################
##
## SurveyProblemSelector
##
##########################################################
##########################################################
sub SurveyProblemSelector {
    my $Str = '';
    my @SurveyProblems;
    foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess('all')) {
        next if ($seq->{'num_assess'}<1);
        foreach my $res (@{$seq->{'contents'}}) {
            next if ($res->{'type'} ne 'assessment');
            foreach my $part (@{$res->{'parts'}}) {
                if ($res->{'partdata'}->{$part}->{'Survey'}) {
                    push(@SurveyProblems,{res=>$res,seq=>$seq,part=>$part});
                    last;
                }
            }
        }
    }
    if (! scalar(@SurveyProblems)) {
        $Str = '<h1>'.
            &mt('There are no survey problems in this course').
            '</h1>'.$/;
        return $Str;
    }
    $Str .= '<table>'.$/;
    $Str .= '<tr>'.'<td></td>'.
        '<th>'.&mt('Sequence').'</th>'.
        '<th>'.&mt('Problem').'</th>'.
        '</tr>'.$/;
    foreach my $problem (@SurveyProblems) {
        my $value = &Apache::lonstathelpers::make_target_id
            ({symb=>$problem->{'res'}->{'symb'},
              part=>$problem->{'part'},
              respid=>undef,
              resptype=>undef});
        my $checked = '';
        if ($ENV{'form.problemchoice'} eq $value) {
            $checked = 'checked ';
        }
        $Str .= '<tr>'.'<td>'.
            '<input type="radio" name="problemchoice" '.
                   'value="'.$value.'" '.$checked.'/>'.'</td>'.
            '<td>'.$problem->{'seq'}->{'title'}.'</td>'.
            '<td>'.$problem->{'res'}->{'title'}.'</td>'.
            '</tr>'.$/;
    }
    $Str .= '</table>';
    return $Str;
}

#########################################################
#########################################################
##
## Compile Student Answers
##
#########################################################
#########################################################
sub Compile_Student_Answers {
    my ($problem,$ProblemData,$Students) = @_;
    my $resource = $problem->{'resource'};
    foreach my $student (@$Students) {
        foreach my $partid (@{$resource->{'parts'}}) {
            my $partdata = $resource->{'partdata'}->{$partid};
            for (my $i=0;$i<=@{$partdata->{'ResponseIds'}};$i++) {
                my $respid = $partdata->{'ResponseIds'}->[$i];
                my $resptype = $partdata->{'ResponseTypes'}->[$i];
                my $results = 
                    &Apache::loncoursedata::get_response_data_by_student
                    ($student,$resource->{'symb'},$respid);
                next if (! defined($results) || ref($results) ne 'ARRAY' || 
                         ref($results->[0]) ne 'ARRAY');
                my $student_response = 
                    $results->[0]->[&Apache::loncoursedata::RDs_submission()];
                $problem->{'responsedata'}->{$partid}->{$respid}->{'_count'}++;
                my $data = $problem->{'responsedata'}->{$partid}->{$respid};
                if ($resptype =~ /^(radiobutton|optionresponse)$/) {
                    # Restricted response type can be categorized.
                    #
                    # Assume responses were not randomized and the order 
                    # represents their value.  This is probably a dumb thing
                    # to do...
                    #
                    my ($foil,$value) = split('=',$student_response);
                    $value += 1;  # explicitly increment it...
                    $data->{'foil_responses'}->{$foil}++;
                    $data->{'foil_values'}->{$value}++;
                    if (! exists($data->{'map'}->{$value})) {
                        $data->{'map'}->{$value} = $foil;
                    }
                } else {
                    # Variable stuff (essays, raw numbers, strings) go here
                    push(@{$data->{'responses'}},$student_response);
                }
            }
        }
    }
    return;
}

#########################################################
#########################################################
##
## make_HTML_report
##
#########################################################
#########################################################
sub make_HTML_report {
    my ($r,$problem,$ProblemData,$Students) = @_;
    &Compile_Student_Answers($problem,$ProblemData,$Students);
    # &output_hash('',$ProblemData);
    my $resource = $problem->{'resource'};
    foreach my $partid (@{$resource->{'parts'}}) {
        my $partdata = $resource->{'partdata'}->{$partid};
        for (my $i=0;$i<=@{$partdata->{'ResponseIds'}};$i++) {
            my $Str = '<table>'.$/;
            my $respid = $partdata->{'ResponseIds'}->[$i];
            my $resptype = $partdata->{'ResponseTypes'}->[$i];
            my $data = $problem->{'responsedata'}->{$partid}->{$respid};
            next if (! defined($data) || ref($data) ne 'HASH');
            # Debugging code
#            $Str .= '<tr>'.
#                '<td>'.$partid.'</td>'.
#                '<td>'.$respid.'</td>'.
#                '<td>'.$resptype.'</td>'.
#                '</tr>'.$/;
            $Str .= '<tr>'.
                '<td><b>'.&mt('Total').'</b></td>'.
                '<td>'.$data->{'_count'}.'</td>'.
                '<td>'.&mt('Part [_1], Response [_2]',$partid,$respid).'</td>'.
                '</tr>'.$/;
            if (exists($data->{'responses'}) && 
                ref($data->{'responses'}) eq 'ARRAY') {
                &randomize_array($data->{'responses'});
                foreach my $response (@{$data->{'responses'}}) {
                    $response =~ s/\\r\\n/\n/g;
                    $response =~ s/\\'/'/g;
                    $response =~ s/\\"/"/g;
                    $Str .= '<tr>'.
                        '<td colspan="3"><pre>'.
                        &HTML::Entities::encode($response,'<>&').
                        '</pre><hr /></td>'.
                        '</tr>'.$/;
                }
            } elsif (exists($data->{'_count'})      && 
                     exists($data->{'foil_values'}) && 
                     exists($data->{'map'})) {
                # This is an option or radiobutton survey response
                my $total = $data->{'_count'};
                my $sum = 0;
                my $tmp;
                foreach my $value (sort(keys(%{$data->{'foil_values'}}))) {
                    my $count = $data->{'foil_values'}->{$value};
                    my $foilid = $data->{'map'}->{$value};
                    my $foiltext = $ProblemData->{$partid.'.'.$respid}->{'_Foils'}->{$foilid}->{'text'};
                    my $foilname = $ProblemData->{$partid.'.'.$respid}->{'_Foils'}->{$foilid}->{'name'};
                    $sum = $value * $data->{'foil_values'}->{$value};
                    $tmp .= '<tr>'.
                        '<td>'.$foilname.'</td>'.
                        '<td>'.$foiltext.'</td>'.
                        '<td align="right">'.$count.'</td>'.
                        '<td align="right">'.
                            sprintf("%.2f",$count/$total*100).'%</td>'.
                        '</tr>'.$/;
                }
                $Str .= '<tr>'.
                    '<th>'.&mt('Foil Name').'</th>'.
                    '<th>'.&mt('Text').'</th>'.
                    '<th>'.&mt('Freq').'</th>'.
                    '<th>'.&mt('Percent').'</th>'.
                    '</tr>'.$/.
                    $tmp;
            }
            $Str.= '</table><hr />';
            $r->print($Str);
            $r->rflush();
        }
    }
    return;
}

sub randomize_array {
    # Fisher Yates shuffle, lifted from p 121 of "The Perl Cookbook"
    my ($array) = @_;
    for (my $i=scalar(@$array);--$i;) {
        my $j = int(rand($i+1));
        next if ($i == $j);
        @$array[$i,$j]=@$array[$j,$i];
    }
}

#########################################################
#########################################################
##
##   Generic Interface Routines
##
#########################################################
#########################################################
sub CreateInterface {
    ##
    ## Environment variable initialization
    my $Str = '';
    $Str .= &Apache::lonhtmlcommon::breadcrumbs
        (undef,'Student Submission Reports');
    $Str .= '<p>';
    $Str .= '<table cellspacing="5">'."\n";
    $Str .= '<tr>';
    $Str .= '<td align="center"><b>'.&mt('Sections').'</b></td>';
    $Str .= '<td align="center"><b>'.&mt('Enrollment Status').'</b></td>';
    $Str .= '</tr>'."\n";
    #
    $Str .= '<tr><td align="center">'."\n";
    $Str .= &Apache::lonstatistics::SectionSelect('Section','multiple',5);
    $Str .= '</td>';
    #
    $Str .= '<td align="center">';
    $Str .= &Apache::lonhtmlcommon::StatusOptions(undef,undef,5);
    $Str .= '</td>';
    #
    $Str .= '</tr>'."\n";
    $Str .= '</table>'."\n";
    #
    $Str .= '<nobr>'.&mt('Status: [_1]',
                         '<input type="text" '.
                         'name="stats_status" size="60" value="" />').
            '</nobr>'.'</p>';    
    ##
    return $Str;
}


1;

__END__
	'.&mt('Sequence').'	'.&mt('Problem').'
'. ''.'	'.$problem->{'seq'}->{'title'}.'	'.$problem->{'res'}->{'title'}.'
'.&mt('Foil Name').'	'.&mt('Text').'	'.&mt('Freq').'	'.&mt('Percent').'
'.$partid.'	'.$respid.'	'.$resptype.'
'.&mt('Total').'	'.$data->{'_count'}.'	'.&mt('Part [_1], Response [_2]',$partid,$respid).'
'. &HTML::Entities::encode($response,'<>&'). '
'.$foilname.'	'.$foiltext.'	'.$count.'	'. sprintf("%.2f",$count/$total*100).'%
'.&mt('Sections').'	'.&mt('Enrollment Status').'
'."\n"; $Str .= &Apache::lonstatistics::SectionSelect('Section','multiple',5); $Str .= '	'; $Str .= &Apache::lonhtmlcommon::StatusOptions(undef,undef,5); $Str .= '