<?php
// $Id: index.php 8216 2006-11-3 18:03:15 NushiFirefox $
/*
==============================================================================
Dokeos - elearning and course management software
Copyright (c) 2006 Bart Mollet < bart.mollet @ hogent . be >
For a full list of contributors, see "credits.txt".
The full license can be read in "license.txt".
This program 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.
See the GNU General Public License for more details.
Contact: Dokeos, 181 rue Royale, B-1000 Brussels, Belgium, info@dokeos.com
==============================================================================
*/
/**
==============================================================================
* This class provides some functions for statistics
* @package dokeos.statistics
==============================================================================
*/
class Statistics
{
/**
* Converts a number of bytes in a formatted string
* @param int $size
* @return string Formatted file size
*/
function make_size_string($size) {
if ($size < pow ( 2 , 10 ) ) return $ size . " bytes " ;
if ($size >= pow(2,10) & & $size < pow ( 2 , 20 ) ) return round ( $ size / pow ( 2 , 10 ) , 0 ) . " KB " ;
if ($size >= pow(2,20) & & $size < pow ( 2 , 30 ) ) return round ( $ size / pow ( 2 , 20 ) , 1 ) . " MB " ;
if ($size > pow(2,30)) return round($size / pow(2,30), 2)." GB";
}
/**
* Count courses
* @param bool $curriculum True if only curriculum-courses should be counted
* @param $string faculty Code of a faculty. Default: count all courses.
* @return int Number of courses counted
*/
function count_courses($faculty = NULL)
{
$course_table = Database :: get_main_table(MAIN_COURSE_TABLE);
$sql = "SELECT COUNT(*) AS number FROM ".$course_table." ";
if (isset ($faculty))
{
$sql .= " WHERE category_code = '$faculty'";
}
$res = api_sql_query($sql, __FILE__, __LINE__);
$obj = mysql_fetch_object($res);
return $obj->number;
}
/**
* Count users
* @param int $status COURSEMANAGER or STUDENT
* @param $string faculty Code of a faculty. Default: count all students.
* @return int Number of students counted
*/
function count_users($status, $faculty = NULL, $count_invisible_courses = true)
{
$course_user_table = Database :: get_main_table(MAIN_COURSE_USER_TABLE);
$course_table = Database :: get_main_table(MAIN_COURSE_TABLE);
$sql = "SELECT COUNT(DISTINCT(cu.user_id)) AS number FROM $course_user_table cu, $course_table c WHERE cu.status = $status AND cu.course_code = c.code";
if (isset ($faculty))
{
$sql = "SELECT COUNT(DISTINCT(cu.user_id)) AS number FROM $course_user_table cu, $course_table c WHERE cu.status = $status AND c.code = cu.course_code AND c.category_code = '$faculty'";
}
$res = api_sql_query($sql, __FILE__, __LINE__);
$obj = mysql_fetch_object($res);
return $obj->number;
}
/**
* Get all faculties
* @return array All faculties (code => name)
*/
function get_faculties()
{
$category_table = Database :: get_main_table(MAIN_CATEGORY_TABLE);
$sql = "SELECT * FROM $category_table ORDER BY tree_pos";
$res = api_sql_query($sql, __FILE__, __LINE__);
$faculties = array ();
while ($fac = mysql_fetch_object($res))
{
$faculties[$fac->code] = $fac->name;
}
return $faculties;
}
/**
* Rescale data
* @param array $data The data that should be rescaled
* @param int $max The maximum value in the rescaled data (default = 500);
* @return array The rescaled data, same key as $data
*/
function rescale($data, $max = 500)
{
$data_max = 1;
foreach ($data as $index => $value)
{
$data_max = ($data_max < $value ? $value : $data_max);
}
reset($data);
$result = array ();
$delta = $max / $data_max;
foreach ($data as $index => $value)
{
$result[$index] = (int) round($value * $delta);
}
return $result;
}
/**
* Show statistics
* @param string $title The title
* @param array $stats
* @param bool $show_total
* @param bool $is_file_size
*/
function print_stats($title, $stats, $show_total = true, $is_file_size = false)
{
$total = 0;
$data = Statistics::rescale($stats);
echo '< table class = "statTable data_table" cellspacing = "0" cellpadding = "3" >
< tr > < th colspan = "4" class = "statHeader" > '.$title.'< / th > < / tr > ';
$i = 0;
foreach($stats as $subtitle => $number)
{
$total += $number;
}
foreach ($stats as $subtitle => $number)
{
$i = $i % 13;
$short_subtitle = str_replace(get_lang('Statistics_Departement'),'',$subtitle);
$short_subtitle = str_replace(get_lang('Statistics_Central_Administration'),'',$short_subtitle);
$short_subtitle = trim($short_subtitle);
if (strlen($subtitle) > 20)
{
$short_subtitle = '< acronym title = "'.$subtitle.'" > '.substr($short_subtitle, 0, 17).'...< / acronym > ';
}
if(!$is_file_size)
{
$number_label = number_format($number, 0, ',', '.');
}
else
{
$number_label = Statistics::make_size_string($number);
}
echo '< tr class = "row_'.($i%2 == 0 ? 'odd' : 'even').'" >
< td width = "150" > '.$short_subtitle.'< / td >
< td width = "550" >
< img src = "../../img/bar_1u.gif" width = "'.$data[$subtitle].'" height = "10" / >
< / td >
< td align = "right" > '.$number_label.'< / td >
< td align = "right" > '.number_format(100*$number/$total, 1, ',', '.').'%< / td >
< / tr > ';
$i ++;
}
if ($show_total)
{
if(!$is_file_size)
{
$total_label = number_format($total, 0, ',', '.');
}
else
{
$total_label = Statistics::make_size_string($total);
}
echo '< tr > < th colspan = "4" align = "right" > '.get_lang('Total').': '.$total_label.'< / td > < / tr > ';
}
echo '< / table > ';
}
/**
* Show statistics about the number of curriculum courses per year
*/
function print_curriculum_courses_stats_by_year()
{
$faculties = Statistics::get_faculties();
for($year = CURRENT_ACADEMIC_YEAR; $year >= FIRST_ACADEMIC_YEAR; $year--)
{
$cdb = 'cdb'.($year != CURRENT_ACADEMIC_YEAR ? $year : '');
$sql = 'SELECT c.category_code AS cat_code,COUNT(c.code) AS number_of_courses FROM dokeos_main.course c, '.$cdb.'.vak v WHERE c.visual_code = v.vak GROUP BY c.category_code';
$res = api_sql_query($sql,__FILE__,__LINE__);
$result = array();
while($obj = mysql_fetch_object($res))
{
$result[$faculties[$obj->cat_code]] = $obj->number_of_courses;
}
Statistics::print_stats(get_lang('Statistics_NumberOfCourses').$year.'-'.($year+1),$result,true);
}
}
/**
* Show statistics about the number of curriculum courses per year per department
*/
function print_curriculum_courses_stats_by_category()
{
$result = array();
$faculties = Statistics::get_faculties();
for($year = CURRENT_ACADEMIC_YEAR; $year >= FIRST_ACADEMIC_YEAR; $year--)
{
$cdb = 'cdb'.($year != CURRENT_ACADEMIC_YEAR ? $year : '');
$sql = 'SELECT c.category_code AS cat_code,COUNT(c.code) AS number_of_courses FROM dokeos_main.course c, '.$cdb.'.vak v WHERE c.visual_code = v.vak GROUP BY c.category_code';
$res = api_sql_query($sql,__FILE__,__LINE__);
while($obj = mysql_fetch_object($res))
{
$result[$faculties[$obj->cat_code]][$year.'-'.($year+1)] = $obj->number_of_courses;
}
}
foreach($result as $faculty => $stats)
{
Statistics::print_stats(get_lang('Statistics_CurriculumCourses').$faculty,$stats,true);
}
}
/**
* Show some stats about the number of logins
* @param string $type month, hour or day
*/
function print_login_stats($type)
{
switch($type)
{
case 'month':
$period = get_lang('PeriodMonth');
$sql = "SELECT DATE_FORMAT( login_date, '%Y %b' ) AS stat_date , count( login_id ) AS number_of_logins FROM dokeos_stats.track_e_login GROUP BY stat_date ORDER BY login_date ";
break;
case 'hour':
$period = get_lang('PeriodHour');
$sql = "SELECT DATE_FORMAT( login_date, '%H' ) AS stat_date , count( login_id ) AS number_of_logins FROM dokeos_stats.track_e_login GROUP BY stat_date ORDER BY stat_date ";
break;
case 'day':
$period = get_lang('PeriodDay');
$sql = "SELECT DATE_FORMAT( login_date, '%a' ) AS stat_date , count( login_id ) AS number_of_logins FROM dokeos_stats.track_e_login GROUP BY stat_date ORDER BY DATE_FORMAT( login_date, '%w' ) ";
break;
}
$res = api_sql_query($sql,__FILE__,__LINE__);
$result = array();
while($obj = mysql_fetch_object($res))
{
$result[$obj->stat_date] = $obj->number_of_logins;
}
Statistics::print_stats(get_lang('Logins').' ('.$period.')',$result,true);
}
/**
* Print the number of resent logins (last minute, hour, day, month)
*/
function print_recent_login_stats()
{
$total_logins = 0;
$sql['... ' & get_lang('Statistics_the_past_minute')] = "SELECT count(DISTINCT access_user_id) AS number FROM dokeos_stats.track_e_lastaccess WHERE DATE_ADD(access_date, INTERVAL 1 MINUTE) >= NOW()";
$sql['... ' & get_lang('Statistics_the_past_hour')] = "SELECT count(DISTINCT access_user_id) AS number FROM dokeos_stats.track_e_lastaccess WHERE DATE_ADD(access_date, INTERVAL 1 HOUR) >= NOW()";
$sql['... ' & get_lang('Statistics_the_past_day')] = "SELECT count(DISTINCT access_user_id) AS number FROM dokeos_stats.track_e_lastaccess WHERE DATE_ADD(access_date, INTERVAL 1 DAY) >= NOW()";
$sql['... ' & get_lang('Statistics_the_past_month')] = "SELECT count(DISTINCT access_user_id) AS number FROM dokeos_stats.track_e_lastaccess WHERE DATE_ADD(access_date, INTERVAL 1 MONTH) >= NOW()";
foreach($sql as $index => $query)
{
#
#$index.': ';
$res = api_sql_query($query,__FILE__,__LINE__);
$obj = mysql_fetch_object($res);
/*
* echo number_format($obj->number, 0, ',', '.');
* echo '< br / > ';
*/
$total_logins += number_format($obj->number, 0, ',', '.');
}
Statistics::print_stats(get_lang('Statistics_Number_of_active_users_on_dokeos'),$total_logins,true);
}
/**
* Show some stats about the accesses to the different course tools
*/
function print_tool_stats()
{
$tools = array('announcement','assignment','calendar_event','chat','conference','course_description','document','dropbox','group','learnpath','link','quiz','student_publication','user','bb_forum');
$sql = "SELECT access_tool, count( access_id ) AS number_of_logins FROM dokeos_stats.track_e_access WHERE access_tool IN ('".implode("','",$tools)."') GROUP BY access_tool ";
$res = api_sql_query($sql,__FILE__,__LINE__);
$result = array();
while($obj = mysql_fetch_object($res))
{
$result[$obj->access_tool] = $obj->number_of_logins;
}
Statistics::print_stats(get_lang('Statistics_Acces_to_coursemodules_hits'),$result,true);
$sql = "SELECT access_tool, count( access_id ) AS number_of_logins FROM dokeos_stats.track_e_lastaccess WHERE access_tool IN ('".implode("','",$tools)."') GROUP BY access_tool ";
$res = api_sql_query($sql,__FILE__,__LINE__);
$result = array();
while($obj = mysql_fetch_object($res))
{
$result[$obj->access_tool] = $obj->number_of_logins;
}
Statistics::print_stats(get_lang('Statistics_Acces_to_coursemodules_use'),$result,true);
}
/**
* Show some stats about the access to old course tools
*/
function print_access_to_old_courses_stats()
{
$currentDate = getDate();
$my_year = $currentDate["year"];
$sql = "SELECT count( access_id ) AS number,
IF( LOCATE( 'ALG', access_cours_code ) ,
'Algemene cursus',
IF( LENGTH( access_cours_code ) =14, 'Curr. " + my_year-2 + "-" + my_year-1 + "', 'Curr. "+my_year-1 +"-"+ my_year +")
) AS type
FROM dokeos_stats.track_e_access
GROUP BY TYPE";
$res = api_sql_query($sql,__FILE__,__LINE__);
$result = array();
while($obj = mysql_fetch_object($res))
{
$result[$obj->type] = $obj->number;
}
Statistics::print_stats(get_lang('Statistics_Acces_to_old_curriculum_courses'),$result,true);
}
/**
* Shows the number of users having their picture uploaded in Dokeos.
*/
function print_user_pictures_stats()
{
$user_table = Database :: get_main_table(MAIN_USER_TABLE);
$sql = "SELECT COUNT(*) AS n FROM $user_table";
$res = api_sql_query($sql,__FILE__,__LINE__);
$count1 = mysql_fetch_object($res);
$sql = "SELECT COUNT(*) AS n FROM $user_table WHERE LENGTH(picture_uri) > 0";
$res = api_sql_query($sql,__FILE__,__LINE__);
$count2 = mysql_fetch_object($res);
$result[get_lang('No')] = $count1->n;
$result[get_lang('Yes')] = $count2->n;
Statistics::print_stats(get_lang('CountUsers').' ('.get_lang('UserPicture').')',$result,true);
# echo $count2->n.' ' & get_lang('Statistics_user_who_have_picture_in_dokeos') & '('.number_format(($count2->n/$count1->n*100), 0, ',', '.').'%)';
}
/**
* Shows statistics about the time of last visit to each course.
*/
function print_course_last_visit()
{
$columns[0] = 'access_cours_code';
$columns[1] = 'access_date';
$sql_order[SORT_ASC] = 'ASC';
$sql_order[SORT_DESC] = 'DESC';
$per_page = isset($_GET['per_page']) ? $_GET['per_page'] : 10;
$page_nr = isset($_GET['page_nr']) ? $_GET['page_nr'] : 1;
$column = isset($_GET['column']) ? $_GET['column'] : 0;
$date_diff = isset($_GET['date_diff']) ? $_GET['date_diff'] : 60;
$direction = isset($_GET['direction']) ? $_GET['direction'] : SORT_ASC;
?>
< form method = "get" action = "index.php" >
< input type = "hidden" name = "action" value = "courselastvisit" / >
< input type = "text" name = "date_diff" value = " <?php echo $date_diff ; ?> " />
< input type = "submit" value = " <?php echo get_lang ( 'Search' ); ?> " />
< / form >
<?php
$sql = "SELECT * FROM dokeos_stats.track_e_lastaccess GROUP BY access_cours_code HAVING access_cours_code < > '' AND DATEDIFF( NOW() , access_date ) > ". $date_diff;
$res = api_sql_query($sql,__FILE__,__LINE__);
$number_of_courses = mysql_num_rows($res);
$sql .= ' ORDER BY '.$columns[$column].' '.$sql_order[$direction];
$from = ($page_nr -1) * $per_page;
$sql .= ' LIMIT '.$from.','.$per_page;
echo Get_lang('Statistics_Last_login_more_than').$date_diff.get_lang('Statistics_Days_ago');
$res = api_sql_query($sql, __FILE__, __LINE__);
if (mysql_num_rows($res) > 0)
{
$courses = array ();
while ($obj = mysql_fetch_object($res))
{
$course = array ();
$course[]= '< a href = "http://dokeos.hogent.be/courses/'.$obj->access_cours_code.'" > '.$obj->access_cours_code.' < a > ';
$course[] = $obj->access_date;
$courses[] = $course;
}
$table_header[] = array ("Coursecode", true);
$table_header[] = array ("Last login", true);
HoGent::display_page_navigation($number_of_courses,$per_page, $page_nr,array_merge($parameters,$_GET));
Display :: display_sortable_table($table_header, $courses, array ('column'=>$column,'direction'=>$direction), array (), $parameters);
HoGent::display_page_navigation($number_of_courses,$per_page, $page_nr,array_merge($parameters,$_GET));
foreach(array_merge($parameters,$_GET) as $id => $value)
{
if ($id!='selectall'){
$link .= $id.'='.$value.'& ';
}
}
}
else
{
echo get_lang('NoSearchResults');
}
}
}
?>
