# The LearningOnline Network with CAPA
#
# $Id: lonsubmissiontimeanalysis.pm,v 1.35.2.2 2012/12/17 02:22:12 raeburn 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::lonsubmissiontimeanalysis;
use strict;
use Apache::lonnet;
use Apache::loncommon();
use Apache::lonhtmlcommon();
use Apache::loncoursedata();
use Apache::lonstatistics;
use Apache::lonstathelpers;
use Apache::lonlocal;
use HTML::Entities();
use Time::Local();
my $plotcolors = ['#33ff00',
'#ff33cc', '#990000', '#aaaa66', '#663399', '#ff9933',
'#66ccff', '#ff9999', '#cccc33', '#660000', '#33cc66',
];
my @SubmitButtons = (
{ name => 'PrevProblemAnalysis',
text => 'Previous Problem' },
{ name => 'ProblemAnalysis',
text => 'Analyze Problem Again' },
{ name => 'NextProblemAnalysis',
text => 'Next Problem' },
{ name => 'SelectAnother',
text => 'Choose a different Problem' },
);
sub BuildSubmissionTimePage {
my ($r,$c)=@_;
#
my %Saveable_Parameters = ('Status' => 'scalar',
'Section' => 'array');
&Apache::loncommon::store_course_settings('submissiontime_analysis',
\%Saveable_Parameters);
&Apache::loncommon::restore_course_settings('submissiontime_analysis',
\%Saveable_Parameters);
#
&Apache::lonstatistics::PrepareClasslist();
#
$r->print(&Apache::lonhtmlcommon::breadcrumbs('Submission Time Plots'));
$r->print(&CreateInterface());
#
my @Students = @Apache::lonstatistics::Students;
#
if (@Students < 1) {
$r->print('
'
.&mt('There are no students in the sections selected.')
.'
'
);
}
#
my @CacheButtonHTML =
&Apache::lonstathelpers::manage_caches($r,'Statistics','stats_status');
$r->rflush();
#
if (! exists($env{'form.problemchoice'}) ||
exists($env{'form.SelectAnother'})) {
my $submit_button = '';
&mt('Generate Graph').'" />';
$r->print($submit_button.' 'x5);
$r->print('
'.&mt('Please select a problem to analyze').'
');
$r->print(&Apache::lonstathelpers::problem_selector('.',
$submit_button));
} else {
foreach my $button (@SubmitButtons) {
$r->print('{'text'}).'" />');
$r->print(' 'x5);
}
foreach my $html (@CacheButtonHTML) {
$r->print($html.(' 'x5));
}
$r->rflush();
#
# Determine which problem we are to analyze
my $current_problem = &Apache::lonstathelpers::get_target_from_id
($env{'form.problemchoice'});
#
my ($navmap,$prev,$curr,$next) =
&Apache::lonstathelpers::get_prev_curr_next($current_problem,
'.',
'part');
if (exists($env{'form.PrevProblemAnalysis'}) && defined($prev)) {
$current_problem = $prev;
} elsif (exists($env{'form.NextProblemAnalysis'}) && 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('');
#
$r->print('');
$r->rflush();
#
my $resource = $current_problem->{'resource'};
if (! defined($resource)) {
$r->print('
');
$r->rflush();
$r->print(&Apache::lonstathelpers::render_resource($resource));
$r->print(' ');
$r->rflush();
if (@Students) {
$r->print(&analyze_times($r,$resource->symb,\@Students,
$current_problem->{'part'}));
}
}
$r->print('');
}
}
#########################################################
#########################################################
##
## Time Analysis
##
#########################################################
#########################################################
sub get_week_start {
my ($randomtime) = @_;
my ($sec,$min,$hour,$mday,$month,$year,$wday,$yday,$isdst) =
localtime($randomtime);
$randomtime -= $wday * 86400;
($sec,$min,$hour,$mday,$month,$year,$wday,$yday,$isdst) =
localtime($randomtime);
my $week_start = &Time::Local::timelocal(0,0,0,$mday,$month,$year);
return $week_start;
}
sub analyze_times {
my ($r,$symb,$students,$part) = @_;
my $htmltable;
#
# Convenience arrays
my @FullWeekDay = (qw/Sunday Monday Tuesday Wednesday Thursday Friday
Saturday/);
my @WeekDay = (qw/SUN MON TUE WED THU FRI SAT SUN/);
my @Month = (qw/Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec/);
#
my $html; # holds results of analysis
# Get the data
my $SubData = &Apache::loncoursedata::get_response_time_data
([&Apache::lonstatistics::get_selected_sections()],
[&Apache::lonstatistics::get_selected_groups()],
$Apache::lonstatistics::enrollment_status,
$symb,$part);
if (! defined($SubData) || ! ref($SubData)) {
$html.= '
'
.&mt('There is no submission data for this problem at all.')
.'
';
return $html;
}
my $NumSub = scalar(@{$SubData});
if (! @{$SubData}) {
$html.= '
'
.&mt('There is no submission data for this problem.')
.'
';
return $html;
}
# Process the data
#
my (undef,undef,undef,$mday,$month,$year,$wday,$yday,$isdst) =
localtime(&get_time_from_row($SubData->[0]));
my $day_start = &Time::Local::timelocal(0,0,0,$mday,$month,$year);
#
# Configure the bins used to store the data.
my $binsize = 3600; # seconds
my $bins_per_day = 86400/$binsize;
my $bincount = 0;
my $endtime = $day_start;
#
# Initialize loop variables
my $max; # The sum of @Ydata
my @Ydata=(0); # number of submissions
my @AnsData=(0); # number of correct submissions
my @Xlabel=($WeekDay[$wday]); # Labels of itmes
my @BinEnd; # The end time of each bin
my $cumulative_answers = 0; # The sum of @AnsData
my %students; # which students have attempted the problem?
#
foreach my $row (@$SubData) {
my $subtime = &get_time_from_row($row);
while ($subtime > $endtime && $endtime < time) {
# Create a new bin
$bincount++;
$Ydata[$bincount] = 0;
$AnsData[$bincount] = 0;
$endtime += $binsize;
push(@BinEnd,$endtime);
if ($bincount % (86400/$binsize) == 0) {
$wday++;
$wday %= 7;
$Xlabel[$bincount] = $WeekDay[$wday];
} else {
$Xlabel[$bincount] = '';
}
}
$Ydata[$bincount]++;
$max = $Ydata[$bincount] if ($max < $Ydata[$bincount]);
$AnsData[$bincount] += &successful_submission($row);
$cumulative_answers += &successful_submission($row);
$students{$row->[&Apache::loncoursedata::RT_student_id()]}++;
}
#
# Pad the data to a full day
while ($bincount % $bins_per_day != 0) {
$bincount++;
$Ydata[$bincount]=0;
$AnsData[$bincount]=0;
$endtime += $binsize;
push(@BinEnd,$endtime);
if ($bincount % (86400/$binsize) == 0) {
$wday ++;
$wday %= 7;
$Xlabel[$bincount] = $WeekDay[$wday];
} else {
$Xlabel[$bincount] = '';
}
}
my $numstudents = scalar(keys(%students));
#
# Determine a nice maximum value to use
foreach my $maximum (10,15,20,25,30,40,50,60,70,80,90,100,
120,150,200,250,300,350,400,450,500,
600,700,800,900,1000,1100,1200,1500,2000,
2500,3000,4000,5000) {
if ($max < $maximum) {
$max = $maximum;
last;
}
}
#
# Build the data table
$htmltable = '