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339 lines
12 KiB
339 lines
12 KiB
<?php
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// $Id: index.php 8216 2006-11-3 18:03:15 NushiFirefox $
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/*
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==============================================================================
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Dokeos - elearning and course management software
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Copyright (c) 2006 Bart Mollet <bart.mollet@hogent.be>
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For a full list of contributors, see "credits.txt".
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The full license can be read in "license.txt".
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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See the GNU General Public License for more details.
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Contact: Dokeos, 181 rue Royale, B-1000 Brussels, Belgium, info@dokeos.com
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==============================================================================
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*/
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require_once (api_get_path(LIBRARY_PATH).'formvalidator/FormValidator.class.php');
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/**
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==============================================================================
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* This class provides some functions for statistics
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* @package dokeos.statistics
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==============================================================================
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*/
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class Statistics
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{
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/**
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* Converts a number of bytes in a formatted string
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* @param int $size
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* @return string Formatted file size
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*/
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function make_size_string($size) {
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if ($size < pow(2,10)) return $size." bytes";
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if ($size >= pow(2,10) && $size < pow(2,20)) return round($size / pow(2,10), 0)." KB";
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if ($size >= pow(2,20) && $size < pow(2,30)) return round($size / pow(2,20), 1)." MB";
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if ($size > pow(2,30)) return round($size / pow(2,30), 2)." GB";
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}
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/**
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* Count courses
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* @param string $category_code Code of a course category. Default: count
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* all courses.
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* @return int Number of courses counted
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*/
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function count_courses($category_code = NULL)
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{
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$course_table = Database :: get_main_table(TABLE_MAIN_COURSE);
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$sql = "SELECT COUNT(*) AS number FROM ".$course_table." ";
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if (isset ($category_code))
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{
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$sql .= " WHERE category_code = '".mysql_real_escape_string($category_code)."'";
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}
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$res = api_sql_query($sql, __FILE__, __LINE__);
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$obj = mysql_fetch_object($res);
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return $obj->number;
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}
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/**
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* Count users
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* @param int $status COURSEMANAGER or STUDENT
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* @param string $category_code Code of a course category. Default: count
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* all users.
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* @return int Number of users counted
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*/
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function count_users($status, $category_code = NULL, $count_invisible_courses = true)
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{
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// Database table definitions
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$course_user_table = Database :: get_main_table(TABLE_MAIN_COURSE_USER);
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$course_table = Database :: get_main_table(TABLE_MAIN_COURSE);
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$user_table = Database :: get_main_table(TABLE_MAIN_USER);
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$sql = "SELECT COUNT(DISTINCT(user_id)) AS number FROM $user_table WHERE status = ".intval(mysql_real_escape_string($status))." ";
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if (isset ($category_code))
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{
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$sql = "SELECT COUNT(DISTINCT(cu.user_id)) AS number FROM $course_user_table cu, $course_table c WHERE cu.status = ".intval(mysql_real_escape_string($status))." AND c.code = cu.course_code AND c.category_code = '".mysql_real_escape_string($category_code)."'";
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}
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$res = api_sql_query($sql, __FILE__, __LINE__);
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$obj = mysql_fetch_object($res);
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return $obj->number;
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}
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/**
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* Get all course categories
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* @return array All course categories (code => name)
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*/
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function get_course_categories()
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{
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$category_table = Database :: get_main_table(TABLE_MAIN_CATEGORY);
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$sql = "SELECT * FROM $category_table ORDER BY tree_pos";
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$res = api_sql_query($sql, __FILE__, __LINE__);
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$categories = array ();
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while ($category = mysql_fetch_object($res))
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{
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$categories[$category->code] = $category->name;
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}
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return $categories;
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}
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/**
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* Rescale data
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* @param array $data The data that should be rescaled
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* @param int $max The maximum value in the rescaled data (default = 500);
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* @return array The rescaled data, same key as $data
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*/
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function rescale($data, $max = 500)
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{
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$data_max = 1;
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foreach ($data as $index => $value)
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{
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$data_max = ($data_max < $value ? $value : $data_max);
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}
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reset($data);
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$result = array ();
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$delta = $max / $data_max;
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foreach ($data as $index => $value)
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{
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$result[$index] = (int) round($value * $delta);
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}
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return $result;
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}
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/**
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* Show statistics
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* @param string $title The title
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* @param array $stats
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* @param bool $show_total
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* @param bool $is_file_size
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*/
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function print_stats($title, $stats, $show_total = true, $is_file_size = false)
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{
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$total = 0;
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$data = Statistics::rescale($stats);
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echo '<table class="data_table" cellspacing="0" cellpadding="3">
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<tr><th colspan="'.($show_total ? '4' : '3').'">'.$title.'</th></tr>';
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$i = 0;
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foreach($stats as $subtitle => $number)
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{
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$total += $number;
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}
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foreach ($stats as $subtitle => $number)
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{
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$i = $i % 13;
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if (api_strlen($subtitle) > 30)
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{
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$subtitle = '<acronym title="'.$subtitle.'">'.api_substr($subtitle, 0, 27).'...</acronym>';
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}
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if(!$is_file_size)
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{
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$number_label = number_format($number, 0, ',', '.');
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}
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else
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{
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$number_label = Statistics::make_size_string($number);
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}
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echo '<tr class="row_'.($i%2 == 0 ? 'odd' : 'even').'">
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<td width="150">'.$subtitle.'</td>
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<td width="550">
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'.Display::return_icon('bar_1u.gif', get_lang('Statistics') ,array('width' => $data[$subtitle], 'height' => '10')).'
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</td>
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<td align="right">'.$number_label.'</td>';
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if($show_total)
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{
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echo '<td align="right"> '.number_format(100*$number/$total, 1, ',', '.').'%</td>';
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}
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echo '</tr>';
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$i ++;
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}
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if ($show_total)
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{
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if(!$is_file_size)
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{
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$total_label = number_format($total, 0, ',', '.');
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}
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else
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{
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$total_label = Statistics::make_size_string($total);
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}
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echo '<tr><th colspan="4" align="right">'.get_lang('Total').': '.$total_label.'</td></tr>';
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}
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echo '</table>';
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}
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/**
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* Show some stats about the number of logins
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* @param string $type month, hour or day
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*/
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function print_login_stats($type)
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{
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$table = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_LOGIN);
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switch($type)
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{
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case 'month':
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$period = get_lang('PeriodMonth');
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$sql = "SELECT DATE_FORMAT( login_date, '%Y %b' ) AS stat_date , count( login_id ) AS number_of_logins FROM ".$table." GROUP BY stat_date ORDER BY login_date ";
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break;
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case 'hour':
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$period = get_lang('PeriodHour');
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$sql = "SELECT DATE_FORMAT( login_date, '%H' ) AS stat_date , count( login_id ) AS number_of_logins FROM ".$table." GROUP BY stat_date ORDER BY stat_date ";
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break;
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case 'day':
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$period = get_lang('PeriodDay');
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$sql = "SELECT DATE_FORMAT( login_date, '%a' ) AS stat_date , count( login_id ) AS number_of_logins FROM ".$table." GROUP BY stat_date ORDER BY DATE_FORMAT( login_date, '%w' ) ";
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break;
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}
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$res = api_sql_query($sql,__FILE__,__LINE__);
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$result = array();
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while($obj = mysql_fetch_object($res))
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{
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$result[$obj->stat_date] = $obj->number_of_logins;
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}
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Statistics::print_stats(get_lang('Logins').' ('.$period.')',$result,true);
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}
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/**
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* Print the number of recent logins
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*/
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function print_recent_login_stats()
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{
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$total_logins = array();
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$table = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_LOGIN);
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$sql[get_lang('Thisday')] = "SELECT count(login_user_id) AS number FROM $table WHERE DATE_ADD(login_date, INTERVAL 1 DAY) >= NOW()";
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$sql[get_lang('Last7days')] = "SELECT count(login_user_id) AS number FROM $table WHERE DATE_ADD(login_date, INTERVAL 7 DAY) >= NOW()";
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$sql[get_lang('Last31days')] = "SELECT count(login_user_id) AS number FROM $table WHERE DATE_ADD(login_date, INTERVAL 31 DAY) >= NOW()";
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$sql[get_lang('Total')] = "SELECT count(login_user_id) AS number FROM $table";
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foreach($sql as $index => $query)
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{
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$res = api_sql_query($query,__FILE__,__LINE__);
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$obj = mysql_fetch_object($res);
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$total_logins[$index] = $obj->number;
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}
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Statistics::print_stats(get_lang('Logins'),$total_logins,false);
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}
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/**
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* Show some stats about the accesses to the different course tools
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*/
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function print_tool_stats()
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{
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$table = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_ACCESS);
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$tools = array('announcement','assignment','calendar_event','chat','conference','course_description','document','dropbox','group','learnpath','link','quiz','student_publication','user','bb_forum');
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$sql = "SELECT access_tool, count( access_id ) AS number_of_logins FROM $table WHERE access_tool IN ('".implode("','",$tools)."') GROUP BY access_tool ";
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$res = api_sql_query($sql,__FILE__,__LINE__);
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$result = array();
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while($obj = mysql_fetch_object($res))
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{
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$result[$obj->access_tool] = $obj->number_of_logins;
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}
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Statistics::print_stats(get_lang('PlatformToolAccess'),$result,true);
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}
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/**
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* Show some stats about the number of courses per language
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*/
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function print_course_by_language_stats()
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{
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$table = Database::get_main_table(TABLE_MAIN_COURSE);
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$sql = "SELECT course_language, count( code ) AS number_of_courses FROM $table GROUP BY course_language ";
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$res = api_sql_query($sql,__FILE__,__LINE__);
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$result = array();
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while($obj = mysql_fetch_object($res))
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{
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$result[$obj->course_language] = $obj->number_of_courses;
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}
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Statistics::print_stats(get_lang('CountCourseByLanguage'),$result,true);
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}
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/**
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* Shows the number of users having their picture uploaded in Dokeos.
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*/
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function print_user_pictures_stats()
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{
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$user_table = Database :: get_main_table(TABLE_MAIN_USER);
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$sql = "SELECT COUNT(*) AS n FROM $user_table";
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$res = api_sql_query($sql,__FILE__,__LINE__);
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$count1 = mysql_fetch_object($res);
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$sql = "SELECT COUNT(*) AS n FROM $user_table WHERE LENGTH(picture_uri) > 0";
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$res = api_sql_query($sql,__FILE__,__LINE__);
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$count2 = mysql_fetch_object($res);
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$result[get_lang('No')] = $count1->n;
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$result[get_lang('Yes')] = $count2->n;
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Statistics::print_stats(get_lang('CountUsers').' ('.get_lang('UserPicture').')',$result,true);
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}
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/**
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* Shows statistics about the time of last visit to each course.
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*/
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function print_course_last_visit()
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{
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$columns[0] = 'access_cours_code';
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$columns[1] = 'access_date';
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$sql_order[SORT_ASC] = 'ASC';
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$sql_order[SORT_DESC] = 'DESC';
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$per_page = isset($_GET['per_page']) ? $_GET['per_page'] : 10;
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$page_nr = isset($_GET['page_nr']) ? $_GET['page_nr'] : 1;
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$column = isset($_GET['column']) ? $_GET['column'] : 0;
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$date_diff = isset($_GET['date_diff']) ? $_GET['date_diff'] : 60;
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$direction = isset($_GET['direction']) ? $_GET['direction'] : SORT_ASC;
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$form = new FormValidator('courselastvisit','get');
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$form->addElement('hidden','action','courselastvisit');
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$form->add_textfield('date_diff',get_lang('Days'),true);
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$form->addRule('date_diff','InvalidNumber','numeric');
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$form->addElement('submit','ok',get_lang('Ok'));
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$defaults['date_diff'] = 60;
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$form->setDefaults($defaults);
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if($form->validate())
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{
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$form->display();
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$values = $form->exportValues();
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$date_diff = $values['date_diff'];
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$table = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_LASTACCESS);
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$sql = "SELECT * FROM $table GROUP BY access_cours_code HAVING access_cours_code <> '' AND DATEDIFF( NOW() , access_date ) >= ". $date_diff;
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$res = api_sql_query($sql,__FILE__,__LINE__);
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$number_of_courses = mysql_num_rows($res);
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$sql .= ' ORDER BY '.$columns[$column].' '.$sql_order[$direction];
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$from = ($page_nr -1) * $per_page;
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$sql .= ' LIMIT '.$from.','.$per_page;
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echo '<p>'.get_lang('LastAccess').' >= '.$date_diff.' '.get_lang('Days').'</p>';
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$res = api_sql_query($sql, __FILE__, __LINE__);
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if (mysql_num_rows($res) > 0)
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{
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$courses = array ();
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while ($obj = mysql_fetch_object($res))
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{
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$course = array ();
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$course[]= '<a href="'.api_get_path(WEB_PATH).'courses/'.$obj->access_cours_code.'">'.$obj->access_cours_code.' <a>';
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$course[] = $obj->access_date;
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$courses[] = $course;
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}
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$parameters['action'] = 'courselastvisit';
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$parameters['date_diff'] = $date_diff;
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$table_header[] = array ("Coursecode", true);
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$table_header[] = array ("Last login", true);
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Display :: display_sortable_table($table_header, $courses, array ('column'=>$column,'direction'=>$direction), array (), $parameters);
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}
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else
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{
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echo get_lang('NoSearchResults');
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}
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}
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else
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{
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$form->display();
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}
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}
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}
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?>
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