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Minor: applied new coding conventions: tab->4spaces

Yannick Warnier vor 14 Jahren
Ursprung
Commit
ae3d8b5a59
1 geänderte Dateien mit 587 neuen und 587 gelöschten Zeilen
  1. 587 587
      main/admin/statistics/statistics.lib.php

+ 587 - 587
main/admin/statistics/statistics.lib.php

@@ -6,623 +6,623 @@ require_once api_get_path(LIBRARY_PATH).'formvalidator/FormValidator.class.php';
 * @package chamilo.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 string $category_code  Code of a course category. Default: count
-	 * all courses.
-	 * @return int Number of courses counted
-	 */
-	function count_courses($category_code = NULL) {
-		global $_configuration;
-		$course_table = Database :: get_main_table(TABLE_MAIN_COURSE);
-		$access_url_rel_course_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
-		$current_url_id = api_get_current_access_url_id();
-		if ($_configuration['multiple_access_urls']) {
-			$sql = "SELECT COUNT(*) AS number FROM ".$course_table." as c, ".$access_url_rel_course_table." as u WHERE u.course_code=c.code AND access_url_id='".$current_url_id."'";
-			if (isset ($category_code)) {
-				$sql .= " AND category_code = '".Database::escape_string($category_code)."'";
-			}
-		} else {
-			$sql = "SELECT COUNT(*) AS number FROM ".$course_table." ";
-			if (isset ($category_code)) {
-				$sql .= " WHERE category_code = '".Database::escape_string($category_code)."'";
-			}
-		}
-		$res = Database::query($sql);
-		$obj = Database::fetch_object($res);
-		return $obj->number;
-	}
+    /**
+     * 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 string $category_code  Code of a course category. Default: count
+     * all courses.
+     * @return int Number of courses counted
+     */
+    function count_courses($category_code = NULL) {
+        global $_configuration;
+        $course_table = Database :: get_main_table(TABLE_MAIN_COURSE);
+        $access_url_rel_course_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
+        $current_url_id = api_get_current_access_url_id();
+        if ($_configuration['multiple_access_urls']) {
+            $sql = "SELECT COUNT(*) AS number FROM ".$course_table." as c, ".$access_url_rel_course_table." as u WHERE u.course_code=c.code AND access_url_id='".$current_url_id."'";
+            if (isset ($category_code)) {
+                $sql .= " AND category_code = '".Database::escape_string($category_code)."'";
+            }
+        } else {
+            $sql = "SELECT COUNT(*) AS number FROM ".$course_table." ";
+            if (isset ($category_code)) {
+                $sql .= " WHERE category_code = '".Database::escape_string($category_code)."'";
+            }
+        }
+        $res = Database::query($sql);
+        $obj = Database::fetch_object($res);
+        return $obj->number;
+    }
 
-	/**
-	 * Count users
-	 * @param int 	 optional, user status (COURSEMANAGER or STUDENT), if it's not setted it'll count all users.
-	 * @param string optional, code of a course category. Default: count only users without filtering category
-	 * @todo count invisible courses
-	 * @return int Number of users counted
-	 */
-	function count_users($status = null, $category_code = null, $count_invisible_courses = true) {
+    /**
+     * Count users
+     * @param int      optional, user status (COURSEMANAGER or STUDENT), if it's not setted it'll count all users.
+     * @param string optional, code of a course category. Default: count only users without filtering category
+     * @todo count invisible courses
+     * @return int Number of users counted
+     */
+    function count_users($status = null, $category_code = null, $count_invisible_courses = true) {
 
-		global $_configuration;
-		// Database table definitions
-		$course_user_table 	= Database :: get_main_table(TABLE_MAIN_COURSE_USER);
-		$course_table 		= Database :: get_main_table(TABLE_MAIN_COURSE);
-		$user_table 		= Database :: get_main_table(TABLE_MAIN_USER);
-		$access_url_rel_user_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
-		$current_url_id = api_get_current_access_url_id();
+        global $_configuration;
+        // Database table definitions
+        $course_user_table     = Database :: get_main_table(TABLE_MAIN_COURSE_USER);
+        $course_table         = Database :: get_main_table(TABLE_MAIN_COURSE);
+        $user_table         = Database :: get_main_table(TABLE_MAIN_USER);
+        $access_url_rel_user_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
+        $current_url_id = api_get_current_access_url_id();
 
-		if ($_configuration['multiple_access_urls']) {
+        if ($_configuration['multiple_access_urls']) {
 
-			$status_filter = isset($status)?' AND status = '.intval($status):'';
-			$sql = "SELECT COUNT(DISTINCT(u.user_id)) AS number FROM $user_table as u, $access_url_rel_user_table as url WHERE u.user_id=url.user_id AND access_url_id='".$current_url_id."' $status_filter ";
-			if (isset ($category_code)) {
-				$sql = "SELECT COUNT(DISTINCT(cu.user_id)) AS number FROM $course_user_table cu, $course_table c, $access_url_rel_user_table as url WHERE c.code = cu.course_code AND c.category_code = '".Database::escape_string($category_code)."' AND cu.user_id=url.user_id AND access_url_id='".$current_url_id."' $status_filter ";
-			}
+            $status_filter = isset($status)?' AND status = '.intval($status):'';
+            $sql = "SELECT COUNT(DISTINCT(u.user_id)) AS number FROM $user_table as u, $access_url_rel_user_table as url WHERE u.user_id=url.user_id AND access_url_id='".$current_url_id."' $status_filter ";
+            if (isset ($category_code)) {
+                $sql = "SELECT COUNT(DISTINCT(cu.user_id)) AS number FROM $course_user_table cu, $course_table c, $access_url_rel_user_table as url WHERE c.code = cu.course_code AND c.category_code = '".Database::escape_string($category_code)."' AND cu.user_id=url.user_id AND access_url_id='".$current_url_id."' $status_filter ";
+            }
 
-		} else {
-			$status_filter = isset($status)?' WHERE status = '.intval($status):'';
-			$sql = "SELECT COUNT(DISTINCT(user_id)) AS number FROM $user_table $status_filter ";
-			if (isset ($category_code)) {
-				$status_filter = isset($status)?' AND status = '.intval($status):'';
-				$sql = "SELECT COUNT(DISTINCT(cu.user_id)) AS number FROM $course_user_table cu, $course_table c WHERE c.code = cu.course_code AND c.category_code = '".Database::escape_string($category_code)."' $status_filter ";
-			}
-		}
+        } else {
+            $status_filter = isset($status)?' WHERE status = '.intval($status):'';
+            $sql = "SELECT COUNT(DISTINCT(user_id)) AS number FROM $user_table $status_filter ";
+            if (isset ($category_code)) {
+                $status_filter = isset($status)?' AND status = '.intval($status):'';
+                $sql = "SELECT COUNT(DISTINCT(cu.user_id)) AS number FROM $course_user_table cu, $course_table c WHERE c.code = cu.course_code AND c.category_code = '".Database::escape_string($category_code)."' $status_filter ";
+            }
+        }
 
-		$res = Database::query($sql);
-		$obj = Database::fetch_object($res);
-		return $obj->number;
-	}
+        $res = Database::query($sql);
+        $obj = Database::fetch_object($res);
+        return $obj->number;
+    }
 
-	/**
-	 * Count activities from track_e_default_table
-	 * @return int Number of activities counted
-	 */
-	function get_number_of_activities() {
-		// Database table definitions
-		global $_configuration;
-		$track_e_default  = Database :: get_statistic_table(TABLE_STATISTIC_TRACK_E_DEFAULT);
-		$table_user = Database::get_main_table(TABLE_MAIN_USER);
-		$access_url_rel_user_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
-		$current_url_id = api_get_current_access_url_id();
-		if ($_configuration['multiple_access_urls']) {
-			$sql = "SELECT count(default_id) AS total_number_of_items FROM $track_e_default, $table_user user, $access_url_rel_user_table url WHERE default_user_id = user.user_id AND user.user_id=url.user_id AND access_url_id='".$current_url_id."'";
-		} else {
-			$sql = "SELECT count(default_id) AS total_number_of_items FROM $track_e_default, $table_user user WHERE default_user_id = user.user_id ";
-		}
+    /**
+     * Count activities from track_e_default_table
+     * @return int Number of activities counted
+     */
+    function get_number_of_activities() {
+        // Database table definitions
+        global $_configuration;
+        $track_e_default  = Database :: get_statistic_table(TABLE_STATISTIC_TRACK_E_DEFAULT);
+        $table_user = Database::get_main_table(TABLE_MAIN_USER);
+        $access_url_rel_user_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
+        $current_url_id = api_get_current_access_url_id();
+        if ($_configuration['multiple_access_urls']) {
+            $sql = "SELECT count(default_id) AS total_number_of_items FROM $track_e_default, $table_user user, $access_url_rel_user_table url WHERE default_user_id = user.user_id AND user.user_id=url.user_id AND access_url_id='".$current_url_id."'";
+        } else {
+            $sql = "SELECT count(default_id) AS total_number_of_items FROM $track_e_default, $table_user user WHERE default_user_id = user.user_id ";
+        }
 
-		if (isset($_GET['keyword'])) {
-			$keyword = Database::escape_string(trim($_GET['keyword']));
-			$sql .= " AND (user.username LIKE '%".$keyword."%' OR default_event_type LIKE '%".$keyword."%' OR default_value_type LIKE '%".$keyword."%' OR default_value LIKE '%".$keyword."%') ";
-		}
+        if (isset($_GET['keyword'])) {
+            $keyword = Database::escape_string(trim($_GET['keyword']));
+            $sql .= " AND (user.username LIKE '%".$keyword."%' OR default_event_type LIKE '%".$keyword."%' OR default_value_type LIKE '%".$keyword."%' OR default_value LIKE '%".$keyword."%') ";
+        }
 
-		$res = Database::query($sql);
-		$obj = Database::fetch_object($res);
-		return $obj->total_number_of_items;
-	}
-	/**
-	 * Get activities data to display
-	 */
-	function get_activities_data($from, $number_of_items, $column, $direction) {
-		global $dateTimeFormatLong, $_configuration;
-		$track_e_default 	= Database :: get_statistic_table(TABLE_STATISTIC_TRACK_E_DEFAULT);
-		$table_user = Database::get_main_table(TABLE_MAIN_USER);
-		$table_course = Database::get_main_table(TABLE_MAIN_COURSE);
-		$access_url_rel_user_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
-		$current_url_id = api_get_current_access_url_id();
+        $res = Database::query($sql);
+        $obj = Database::fetch_object($res);
+        return $obj->total_number_of_items;
+    }
+    /**
+     * Get activities data to display
+     */
+    function get_activities_data($from, $number_of_items, $column, $direction) {
+        global $dateTimeFormatLong, $_configuration;
+        $track_e_default     = Database :: get_statistic_table(TABLE_STATISTIC_TRACK_E_DEFAULT);
+        $table_user = Database::get_main_table(TABLE_MAIN_USER);
+        $table_course = Database::get_main_table(TABLE_MAIN_COURSE);
+        $access_url_rel_user_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
+        $current_url_id = api_get_current_access_url_id();
 
-		$column 		 = intval($column);
-		$from 			 = intval($from);
-		$number_of_items = intval($number_of_items);
+        $column          = intval($column);
+        $from              = intval($from);
+        $number_of_items = intval($number_of_items);
 
-		if (!in_array($direction, array('ASC','DESC'))) {
-       	            $direction = 'DESC';
-		}
-		if ($_configuration['multiple_access_urls']) {
-			$sql = "SELECT
-			 	default_event_type  as col0,
-				default_value_type	as col1,
-				default_value		as col2,
-				user.username 		as col3,
-				default_date 		as col4
-			FROM $track_e_default as track_default, $table_user as user, $access_url_rel_user_table as url
-			WHERE track_default.default_user_id = user.user_id AND url.user_id=user.user_id AND access_url_id='".$current_url_id."'";
-		} else {
-			$sql = "SELECT
-			 	default_event_type  as col0,
-				default_value_type	as col1,
-				default_value		as col2,
-				user.username 		as col3,
-				default_date 		as col4
-			FROM $track_e_default track_default, $table_user user
-			WHERE track_default.default_user_id = user.user_id ";
-		}
+        if (!in_array($direction, array('ASC','DESC'))) {
+                       $direction = 'DESC';
+        }
+        if ($_configuration['multiple_access_urls']) {
+            $sql = "SELECT
+                 default_event_type  as col0,
+                default_value_type    as col1,
+                default_value        as col2,
+                user.username         as col3,
+                default_date         as col4
+            FROM $track_e_default as track_default, $table_user as user, $access_url_rel_user_table as url
+            WHERE track_default.default_user_id = user.user_id AND url.user_id=user.user_id AND access_url_id='".$current_url_id."'";
+        } else {
+            $sql = "SELECT
+                 default_event_type  as col0,
+                default_value_type    as col1,
+                default_value        as col2,
+                user.username         as col3,
+                default_date         as col4
+            FROM $track_e_default track_default, $table_user user
+            WHERE track_default.default_user_id = user.user_id ";
+        }
 
-		if (isset($_GET['keyword'])) {
-		    $keyword = Database::escape_string(trim($_GET['keyword']));
-		    $sql .= " AND (user.username LIKE '%".$keyword."%' OR default_event_type LIKE '%".$keyword."%' OR default_value_type LIKE '%".$keyword."%' OR default_value LIKE '%".$keyword."%') ";
-		}
+        if (isset($_GET['keyword'])) {
+            $keyword = Database::escape_string(trim($_GET['keyword']));
+            $sql .= " AND (user.username LIKE '%".$keyword."%' OR default_event_type LIKE '%".$keyword."%' OR default_value_type LIKE '%".$keyword."%' OR default_value LIKE '%".$keyword."%') ";
+        }
 
-		if (!empty($column) && !empty($direction)) {
-			$sql .=	" ORDER BY col$column $direction";
-		} else {
-			$sql .=	" ORDER BY col4 DESC ";
-		}
-		$sql .=	" LIMIT $from,$number_of_items ";
+        if (!empty($column) && !empty($direction)) {
+            $sql .=    " ORDER BY col$column $direction";
+        } else {
+            $sql .=    " ORDER BY col4 DESC ";
+        }
+        $sql .=    " LIMIT $from,$number_of_items ";
 
-		$res = Database::query($sql);
-		$activities = array ();
-		while ($row = Database::fetch_row($res)) {
-			$row[4] = api_get_local_time($row[4], null, date_default_timezone_get());
-			$activities[] = $row;
-		}
-		return $activities;
-	}
+        $res = Database::query($sql);
+        $activities = array ();
+        while ($row = Database::fetch_row($res)) {
+            $row[4] = api_get_local_time($row[4], null, date_default_timezone_get());
+            $activities[] = $row;
+        }
+        return $activities;
+    }
 
-	/**
-	 * Get all course categories
-	 * @return array All course categories (code => name)
-	 */
-	function get_course_categories() {
-		$category_table = Database :: get_main_table(TABLE_MAIN_CATEGORY);
-		$sql = "SELECT code, name FROM $category_table ORDER BY tree_pos";
-		$res = Database::query($sql);
-		$categories = array ();
-		while ($category = Database::fetch_object($res)) {
-			$categories[$category->code] = $category->name;
-		}
-		return $categories;
-	}
-	/**
-	 * 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);
+    /**
+     * Get all course categories
+     * @return array All course categories (code => name)
+     */
+    function get_course_categories() {
+        $category_table = Database :: get_main_table(TABLE_MAIN_CATEGORY);
+        $sql = "SELECT code, name FROM $category_table ORDER BY tree_pos";
+        $res = Database::query($sql);
+        $categories = array ();
+        while ($category = Database::fetch_object($res)) {
+            $categories[$category->code] = $category->name;
+        }
+        return $categories;
+    }
+    /**
+     * 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="data_table" cellspacing="0" cellpadding="3">
-			  		  <tr><th colspan="'.($show_total ? '4' : '3').'">'.$title.'</th></tr>';
-		$i = 0;
-		foreach ($stats as $subtitle => $number) {
-			$total += $number;
-		}
-		foreach ($stats as $subtitle => $number) {
-			//$i = $i % 13;
-			/*if (api_strlen($subtitle) > 30) {
-				$subtitle = '<acronym title="'.$subtitle.'">'.$subtitle.'</acronym>';
-			}*/
-			if (!$is_file_size) {
-				$number_label = number_format($number, 0, ',', '.');
-			} else {
-				$number_label = Statistics::make_size_string($number);
-			}
+        echo '<table class="data_table" cellspacing="0" cellpadding="3">
+                        <tr><th colspan="'.($show_total ? '4' : '3').'">'.$title.'</th></tr>';
+        $i = 0;
+        foreach ($stats as $subtitle => $number) {
+            $total += $number;
+        }
+        foreach ($stats as $subtitle => $number) {
+            //$i = $i % 13;
+            /*if (api_strlen($subtitle) > 30) {
+                $subtitle = '<acronym title="'.$subtitle.'">'.$subtitle.'</acronym>';
+            }*/
+            if (!$is_file_size) {
+                $number_label = number_format($number, 0, ',', '.');
+            } else {
+                $number_label = Statistics::make_size_string($number);
+            }
 
-			echo '<tr class="row_'.($i%2 == 0 ? 'odd' : 'even').'">
-								<td width="150">'.$subtitle.'</td>
-								<td width="550">
-						 			'.Display::return_icon('bar_1u.gif', get_lang('Statistics') ,array('width' => $data[$subtitle], 'height' => '10')).'
-								</td>
-								<td align="right">'.$number_label.'</td>';
-			if ($show_total) {
-				echo '<td align="right"> '.($total>0?number_format(100*$number/$total, 1, ',', '.'):'0').'%</td>';
-			}
-			echo '</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 some stats about the number of logins
-	 * @param string $type month, hour or day
-	 */
-	function print_login_stats($type) {
-		global $_configuration;
-		$table = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_LOGIN);
-		$access_url_rel_user_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
-		$current_url_id = api_get_current_access_url_id();
-		if ($_configuration['multiple_access_urls']) {
-			$table_url = ", $access_url_rel_user_table";
-			$where_url = " WHERE login_user_id=user_id AND access_url_id='".$current_url_id."'";
-			$where_url_last = ' AND login_date > DATE_SUB(NOW(),INTERVAL 1 %s)';
-		} else {
-			$table_url = '';
-			$where_url = '';
-			$where_url_last = ' WHERE login_date > DATE_SUB(NOW(),INTERVAL 1 %s)';
-		}
-		switch ($type) {
-			case 'month':
-				$months = api_get_months_long();
-				$period = get_lang('PeriodMonth');
-				$sql = "SELECT DATE_FORMAT( login_date, '%Y-%m' ) AS stat_date , count( login_id ) AS number_of_logins FROM ".$table.$table_url.$where_url." GROUP BY stat_date ORDER BY login_date ";
-				$sql_last_x = "SELECT DATE_FORMAT( login_date, '%Y-%m' ) AS stat_date , count( login_id ) AS number_of_logins FROM ".$table.$table_url.$where_url.sprintf($where_url_last,'YEAR')." GROUP BY stat_date ORDER BY login_date ";
-				break;
-			case 'hour':
-				$period = get_lang('PeriodHour');
-				$sql = "SELECT DATE_FORMAT( login_date, '%H' ) AS stat_date , count( login_id ) AS number_of_logins FROM ".$table.$table_url.$where_url." GROUP BY stat_date ORDER BY stat_date ";
-				$sql_last_x = "SELECT DATE_FORMAT( login_date, '%H' ) AS stat_date , count( login_id ) AS number_of_logins FROM ".$table.$table_url.$where_url.sprintf($where_url_last,'DAY')." GROUP BY stat_date ORDER BY stat_date ";
-				break;
-			case 'day':
-				$week_days = api_get_week_days_long();
-				$period = get_lang('PeriodDay');
-				$sql = "SELECT DATE_FORMAT( login_date, '%w' ) AS stat_date , count( login_id ) AS number_of_logins FROM ".$table.$table_url.$where_url." GROUP BY stat_date ORDER BY DATE_FORMAT( login_date, '%w' ) ";
-				$sql_last_x = "SELECT DATE_FORMAT( login_date, '%w' ) AS stat_date , count( login_id ) AS number_of_logins FROM ".$table.$table_url.$where_url.sprintf($where_url_last,'WEEK')." GROUP BY stat_date ORDER BY DATE_FORMAT( login_date, '%w' ) ";
-				break;
-		}
-		$res_last_x = Database::query($sql_last_x);
-		$result_last_x = array();
-		while ($obj = Database::fetch_object($res_last_x)) {
-			$stat_date = $obj->stat_date;
-			switch ($type) {
-				case 'month':
-					$stat_date = explode('-', $stat_date);
-					$stat_date[1] = $months[$stat_date[1] - 1];
-					$stat_date = implode(' ', $stat_date);
-					break;
-				case 'day':
-					$stat_date = $week_days[$stat_date];
-					break;
-			}
-			$result_last_x[$stat_date] = $obj->number_of_logins;
-		}
-		Statistics::print_stats(get_lang('LastLogins').' ('.$period.')', $result_last_x, true);
-		flush(); //flush web request at this point to see something already while the full data set is loading
-		echo '<br />';
-		$res = Database::query($sql);
-		$result = array();
-		while ($obj = Database::fetch_object($res)) {
-			$stat_date = $obj->stat_date;
-			switch ($type) {
-				case 'month':
-					$stat_date = explode('-', $stat_date);
-					$stat_date[1] = $months[$stat_date[1] - 1];
-					$stat_date = implode(' ', $stat_date);
-					break;
-				case 'day':
-					$stat_date = $week_days[$stat_date];
-					break;
-			}
-			$result[$stat_date] = $obj->number_of_logins;
-		}
-		Statistics::print_stats(get_lang('AllLogins').' ('.$period.')', $result, true);
-	}
-	/**
-	 * Print the number of recent logins
-	 */
-	function print_recent_login_stats() {
-		global $_configuration;
-		$total_logins = array();
-		$table = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_LOGIN);
-		$access_url_rel_user_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
-		$current_url_id = api_get_current_access_url_id();
-		if ($_configuration['multiple_access_urls']) {
-			$table_url = ", $access_url_rel_user_table";
-			$where_url = " AND login_user_id=user_id AND access_url_id='".$current_url_id."'";
-		} else {
-			$table_url = '';
-			$where_url='';
-		}
-		$sql[get_lang('Thisday')] 	 = "SELECT count(login_user_id) AS number FROM $table $table_url WHERE DATE_ADD(login_date, INTERVAL 1 DAY) >= NOW() $where_url";
-		$sql[get_lang('Last7days')]  = "SELECT count(login_user_id) AS number  FROM $table $table_url WHERE DATE_ADD(login_date, INTERVAL 7 DAY) >= NOW() $where_url";
-		$sql[get_lang('Last31days')] = "SELECT count(login_user_id) AS number  FROM $table $table_url WHERE DATE_ADD(login_date, INTERVAL 31 DAY) >= NOW() $where_url";
-		$sql[get_lang('Total')] 	 = "SELECT count(login_user_id) AS number  FROM $table $table_url WHERE 1=1 $where_url";
-		foreach ($sql as $index => $query) {
-			$res = Database::query($query);
-			$obj = Database::fetch_object($res);
-			$total_logins[$index] = $obj->number;
-		}
-		Statistics::print_stats(get_lang('Logins'),$total_logins,false);
-	}
-	/**
-	 * Show some stats about the accesses to the different course tools
-	 */
-	function print_tool_stats() {
-		global $_configuration;
-		$table = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_ACCESS);
-		$access_url_rel_course_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
-		$current_url_id = api_get_current_access_url_id();
+            echo '<tr class="row_'.($i%2 == 0 ? 'odd' : 'even').'">
+                                <td width="150">'.$subtitle.'</td>
+                                <td width="550">
+                                     '.Display::return_icon('bar_1u.gif', get_lang('Statistics') ,array('width' => $data[$subtitle], 'height' => '10')).'
+                                </td>
+                                <td align="right">'.$number_label.'</td>';
+            if ($show_total) {
+                echo '<td align="right"> '.($total>0?number_format(100*$number/$total, 1, ',', '.'):'0').'%</td>';
+            }
+            echo '</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 some stats about the number of logins
+     * @param string $type month, hour or day
+     */
+    function print_login_stats($type) {
+        global $_configuration;
+        $table = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_LOGIN);
+        $access_url_rel_user_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
+        $current_url_id = api_get_current_access_url_id();
+        if ($_configuration['multiple_access_urls']) {
+            $table_url = ", $access_url_rel_user_table";
+            $where_url = " WHERE login_user_id=user_id AND access_url_id='".$current_url_id."'";
+            $where_url_last = ' AND login_date > DATE_SUB(NOW(),INTERVAL 1 %s)';
+        } else {
+            $table_url = '';
+            $where_url = '';
+            $where_url_last = ' WHERE login_date > DATE_SUB(NOW(),INTERVAL 1 %s)';
+        }
+        switch ($type) {
+            case 'month':
+                $months = api_get_months_long();
+                $period = get_lang('PeriodMonth');
+                $sql = "SELECT DATE_FORMAT( login_date, '%Y-%m' ) AS stat_date , count( login_id ) AS number_of_logins FROM ".$table.$table_url.$where_url." GROUP BY stat_date ORDER BY login_date ";
+                $sql_last_x = "SELECT DATE_FORMAT( login_date, '%Y-%m' ) AS stat_date , count( login_id ) AS number_of_logins FROM ".$table.$table_url.$where_url.sprintf($where_url_last,'YEAR')." GROUP BY stat_date ORDER BY login_date ";
+                break;
+            case 'hour':
+                $period = get_lang('PeriodHour');
+                $sql = "SELECT DATE_FORMAT( login_date, '%H' ) AS stat_date , count( login_id ) AS number_of_logins FROM ".$table.$table_url.$where_url." GROUP BY stat_date ORDER BY stat_date ";
+                $sql_last_x = "SELECT DATE_FORMAT( login_date, '%H' ) AS stat_date , count( login_id ) AS number_of_logins FROM ".$table.$table_url.$where_url.sprintf($where_url_last,'DAY')." GROUP BY stat_date ORDER BY stat_date ";
+                break;
+            case 'day':
+                $week_days = api_get_week_days_long();
+                $period = get_lang('PeriodDay');
+                $sql = "SELECT DATE_FORMAT( login_date, '%w' ) AS stat_date , count( login_id ) AS number_of_logins FROM ".$table.$table_url.$where_url." GROUP BY stat_date ORDER BY DATE_FORMAT( login_date, '%w' ) ";
+                $sql_last_x = "SELECT DATE_FORMAT( login_date, '%w' ) AS stat_date , count( login_id ) AS number_of_logins FROM ".$table.$table_url.$where_url.sprintf($where_url_last,'WEEK')." GROUP BY stat_date ORDER BY DATE_FORMAT( login_date, '%w' ) ";
+                break;
+        }
+        $res_last_x = Database::query($sql_last_x);
+        $result_last_x = array();
+        while ($obj = Database::fetch_object($res_last_x)) {
+            $stat_date = $obj->stat_date;
+            switch ($type) {
+                case 'month':
+                    $stat_date = explode('-', $stat_date);
+                    $stat_date[1] = $months[$stat_date[1] - 1];
+                    $stat_date = implode(' ', $stat_date);
+                    break;
+                case 'day':
+                    $stat_date = $week_days[$stat_date];
+                    break;
+            }
+            $result_last_x[$stat_date] = $obj->number_of_logins;
+        }
+        Statistics::print_stats(get_lang('LastLogins').' ('.$period.')', $result_last_x, true);
+        flush(); //flush web request at this point to see something already while the full data set is loading
+        echo '<br />';
+        $res = Database::query($sql);
+        $result = array();
+        while ($obj = Database::fetch_object($res)) {
+            $stat_date = $obj->stat_date;
+            switch ($type) {
+                case 'month':
+                    $stat_date = explode('-', $stat_date);
+                    $stat_date[1] = $months[$stat_date[1] - 1];
+                    $stat_date = implode(' ', $stat_date);
+                    break;
+                case 'day':
+                    $stat_date = $week_days[$stat_date];
+                    break;
+            }
+            $result[$stat_date] = $obj->number_of_logins;
+        }
+        Statistics::print_stats(get_lang('AllLogins').' ('.$period.')', $result, true);
+    }
+    /**
+     * Print the number of recent logins
+     */
+    function print_recent_login_stats() {
+        global $_configuration;
+        $total_logins = array();
+        $table = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_LOGIN);
+        $access_url_rel_user_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
+        $current_url_id = api_get_current_access_url_id();
+        if ($_configuration['multiple_access_urls']) {
+            $table_url = ", $access_url_rel_user_table";
+            $where_url = " AND login_user_id=user_id AND access_url_id='".$current_url_id."'";
+        } else {
+            $table_url = '';
+            $where_url='';
+        }
+        $sql[get_lang('Thisday')]      = "SELECT count(login_user_id) AS number FROM $table $table_url WHERE DATE_ADD(login_date, INTERVAL 1 DAY) >= NOW() $where_url";
+        $sql[get_lang('Last7days')]  = "SELECT count(login_user_id) AS number  FROM $table $table_url WHERE DATE_ADD(login_date, INTERVAL 7 DAY) >= NOW() $where_url";
+        $sql[get_lang('Last31days')] = "SELECT count(login_user_id) AS number  FROM $table $table_url WHERE DATE_ADD(login_date, INTERVAL 31 DAY) >= NOW() $where_url";
+        $sql[get_lang('Total')]      = "SELECT count(login_user_id) AS number  FROM $table $table_url WHERE 1=1 $where_url";
+        foreach ($sql as $index => $query) {
+            $res = Database::query($query);
+            $obj = Database::fetch_object($res);
+            $total_logins[$index] = $obj->number;
+        }
+        Statistics::print_stats(get_lang('Logins'),$total_logins,false);
+    }
+    /**
+     * Show some stats about the accesses to the different course tools
+     */
+    function print_tool_stats() {
+        global $_configuration;
+        $table = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_ACCESS);
+        $access_url_rel_course_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
+        $current_url_id = api_get_current_access_url_id();
 
-		$tools = array('announcement','assignment','calendar_event',
-			'chat','conference','course_description','document',
-			'dropbox','group','learnpath','link','quiz',
-			'student_publication','user','forum');
-		$tool_names = array();
-		foreach ($tools as $tool) {
-			$tool_names[$tool] = get_lang(ucfirst($tool), '');
-		}
-		if ($_configuration['multiple_access_urls']) {
-			$sql = "SELECT access_tool, count( access_id )
-				AS number_of_logins FROM $table, $access_url_rel_course_table
-				WHERE access_tool IN ('".implode("','",$tools)."') AND  course_code = access_cours_code AND access_url_id='".$current_url_id."'
-				GROUP BY access_tool ";
-		} else {
-			$sql = "SELECT access_tool, count( access_id )
-				AS number_of_logins FROM $table
-				WHERE access_tool IN ('".implode("','",$tools)."')
-				GROUP BY access_tool ";
-		}
-		$res = Database::query($sql);
-		$result = array();
-		while ($obj = Database::fetch_object($res)) {
-			$result[$tool_names[$obj->access_tool]] = $obj->number_of_logins;
-		}
-		Statistics::print_stats(get_lang('PlatformToolAccess'),$result,true);
-	}
-	/**
-	 * Show some stats about the number of courses per language
-	 */
-	function print_course_by_language_stats() {
-		global $_configuration;
-		$table = Database :: get_main_table(TABLE_MAIN_COURSE);
-		$access_url_rel_course_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
-		$current_url_id = api_get_current_access_url_id();
-		if ($_configuration['multiple_access_urls']) {
-			$sql = "SELECT course_language, count( c.code )
-			AS number_of_courses
-			FROM $table as c, $access_url_rel_course_table as u WHERE u.course_code=c.code AND access_url_id='".$current_url_id."' GROUP BY course_language";
-		} else {
-			$sql = "SELECT course_language, count( code )
-			AS number_of_courses
-			FROM $table GROUP BY course_language ";
-		}
-		$res = Database::query($sql);
-		$result = array();
-		while ($obj = Database::fetch_object($res)) {
-			$result[$obj->course_language] = $obj->number_of_courses;
-		}
-		Statistics::print_stats(get_lang('CountCourseByLanguage'),$result,true);
-	}
-	/**
-	 * Shows the number of users having their picture uploaded in Dokeos.
-	 */
-	function print_user_pictures_stats() {
-		global $_configuration;
-		$user_table = Database :: get_main_table(TABLE_MAIN_USER);
-		$access_url_rel_user_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
-		$current_url_id = api_get_current_access_url_id();
-		if ($_configuration['multiple_access_urls']) {
-			$url_condition =  ", $access_url_rel_user_table as url WHERE url.user_id=u.user_id AND access_url_id='".$current_url_id."'";
-			$url_condition2 = " AND url.user_id=u.user_id AND access_url_id='".$current_url_id."'";
-			$table = ", $access_url_rel_user_table as url ";
-		}
-		$sql = "SELECT COUNT(*) AS n FROM $user_table as u ".$url_condition;
-		$res = Database::query($sql);
-		$count1 = Database::fetch_object($res);
-		$sql = "SELECT COUNT(*) AS n FROM $user_table as u $table
-			WHERE LENGTH(picture_uri) > 0 $url_condition2";
+        $tools = array('announcement','assignment','calendar_event',
+            'chat','conference','course_description','document',
+            'dropbox','group','learnpath','link','quiz',
+            'student_publication','user','forum');
+        $tool_names = array();
+        foreach ($tools as $tool) {
+            $tool_names[$tool] = get_lang(ucfirst($tool), '');
+        }
+        if ($_configuration['multiple_access_urls']) {
+            $sql = "SELECT access_tool, count( access_id )
+                AS number_of_logins FROM $table, $access_url_rel_course_table
+                WHERE access_tool IN ('".implode("','",$tools)."') AND  course_code = access_cours_code AND access_url_id='".$current_url_id."'
+                GROUP BY access_tool ";
+        } else {
+            $sql = "SELECT access_tool, count( access_id )
+                AS number_of_logins FROM $table
+                WHERE access_tool IN ('".implode("','",$tools)."')
+                GROUP BY access_tool ";
+        }
+        $res = Database::query($sql);
+        $result = array();
+        while ($obj = Database::fetch_object($res)) {
+            $result[$tool_names[$obj->access_tool]] = $obj->number_of_logins;
+        }
+        Statistics::print_stats(get_lang('PlatformToolAccess'),$result,true);
+    }
+    /**
+     * Show some stats about the number of courses per language
+     */
+    function print_course_by_language_stats() {
+        global $_configuration;
+        $table = Database :: get_main_table(TABLE_MAIN_COURSE);
+        $access_url_rel_course_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
+        $current_url_id = api_get_current_access_url_id();
+        if ($_configuration['multiple_access_urls']) {
+            $sql = "SELECT course_language, count( c.code )
+            AS number_of_courses
+            FROM $table as c, $access_url_rel_course_table as u WHERE u.course_code=c.code AND access_url_id='".$current_url_id."' GROUP BY course_language";
+        } else {
+            $sql = "SELECT course_language, count( code )
+            AS number_of_courses
+            FROM $table GROUP BY course_language ";
+        }
+        $res = Database::query($sql);
+        $result = array();
+        while ($obj = Database::fetch_object($res)) {
+            $result[$obj->course_language] = $obj->number_of_courses;
+        }
+        Statistics::print_stats(get_lang('CountCourseByLanguage'),$result,true);
+    }
+    /**
+     * Shows the number of users having their picture uploaded in Dokeos.
+     */
+    function print_user_pictures_stats() {
+        global $_configuration;
+        $user_table = Database :: get_main_table(TABLE_MAIN_USER);
+        $access_url_rel_user_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
+        $current_url_id = api_get_current_access_url_id();
+        if ($_configuration['multiple_access_urls']) {
+            $url_condition =  ", $access_url_rel_user_table as url WHERE url.user_id=u.user_id AND access_url_id='".$current_url_id."'";
+            $url_condition2 = " AND url.user_id=u.user_id AND access_url_id='".$current_url_id."'";
+            $table = ", $access_url_rel_user_table as url ";
+        }
+        $sql = "SELECT COUNT(*) AS n FROM $user_table as u ".$url_condition;
+        $res = Database::query($sql);
+        $count1 = Database::fetch_object($res);
+        $sql = "SELECT COUNT(*) AS n FROM $user_table as u $table
+            WHERE LENGTH(picture_uri) > 0 $url_condition2";
 
 
-		$res = Database::query($sql);
-		$count2 = Database::fetch_object($res);
-		// #users without picture
-		$result[get_lang('No')] = $count1->n - $count2->n;
-		$result[get_lang('Yes')] = $count2->n; // #users with picture
-		Statistics::print_stats(get_lang('CountUsers').' ('.get_lang('UserPicture').')',$result,true);
-	}
+        $res = Database::query($sql);
+        $count2 = Database::fetch_object($res);
+        // #users without picture
+        $result[get_lang('No')] = $count1->n - $count2->n;
+        $result[get_lang('Yes')] = $count2->n; // #users with picture
+        Statistics::print_stats(get_lang('CountUsers').' ('.get_lang('UserPicture').')',$result,true);
+    }
 
-	function print_activities_stats() {
+    function print_activities_stats() {
 
-		echo '<h4>'.get_lang('ImportantActivities').'</h4>';
+        echo '<h4>'.get_lang('ImportantActivities').'</h4>';
 
-		// Create a search-box
-		$form = new FormValidator('search_simple','get',api_get_path(WEB_CODE_PATH).'admin/statistics/index.php?action=activities','','width=200px',false);
-		$renderer =& $form->defaultRenderer();
-		$renderer->setElementTemplate('<span>{element}</span> ');
-		$form->addElement('hidden','action','activities');
-		$form->addElement('hidden','activities_direction','DESC');
-		$form->addElement('hidden','activities_column','4');
-		$form->addElement('text','keyword',get_lang('keyword'));
-		$form->addElement('style_submit_button', 'submit', get_lang('SearchActivities'),'class="search"');
-		echo '<div class="actions">';
-			$form->display();
-		echo '</div>';
+        // Create a search-box
+        $form = new FormValidator('search_simple','get',api_get_path(WEB_CODE_PATH).'admin/statistics/index.php?action=activities','','width=200px',false);
+        $renderer =& $form->defaultRenderer();
+        $renderer->setElementTemplate('<span>{element}</span> ');
+        $form->addElement('hidden','action','activities');
+        $form->addElement('hidden','activities_direction','DESC');
+        $form->addElement('hidden','activities_column','4');
+        $form->addElement('text','keyword',get_lang('keyword'));
+        $form->addElement('style_submit_button', 'submit', get_lang('SearchActivities'),'class="search"');
+        echo '<div class="actions">';
+            $form->display();
+        echo '</div>';
 
 
-		$table = new SortableTable('activities', array('Statistics','get_number_of_activities'), array('Statistics','get_activities_data'),4,50,'DESC');
-		$parameters = array();
+        $table = new SortableTable('activities', array('Statistics','get_number_of_activities'), array('Statistics','get_activities_data'),4,50,'DESC');
+        $parameters = array();
 
-		$parameters['action'] = 'activities';
-		if (isset($_GET['keyword'])) {
-			$parameters['keyword'] = Security::remove_XSS($_GET['keyword']);
-		}
+        $parameters['action'] = 'activities';
+        if (isset($_GET['keyword'])) {
+            $parameters['keyword'] = Security::remove_XSS($_GET['keyword']);
+        }
 
-		$table->set_additional_parameters($parameters);
-		$table->set_header(0, get_lang('EventType'));
-		$table->set_header(1, get_lang('DataType'));
-		$table->set_header(2, get_lang('Value'));
-		$table->set_header(3, get_lang('UserName'));
-		$table->set_header(4, get_lang('Date'));
-		$table->display();
-	}
+        $table->set_additional_parameters($parameters);
+        $table->set_header(0, get_lang('EventType'));
+        $table->set_header(1, get_lang('DataType'));
+        $table->set_header(2, get_lang('Value'));
+        $table->set_header(3, get_lang('UserName'));
+        $table->set_header(4, get_lang('Date'));
+        $table->display();
+    }
 
-	/**
-	 * Shows statistics about the time of last visit to each course.
-	 */
-	function print_course_last_visit() {
-		global $_configuration;
-		$access_url_rel_course_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
-		$current_url_id = api_get_current_access_url_id();
+    /**
+     * Shows statistics about the time of last visit to each course.
+     */
+    function print_course_last_visit() {
+        global $_configuration;
+        $access_url_rel_course_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
+        $current_url_id = api_get_current_access_url_id();
 
-		$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'])?intval($_GET['per_page']) : 10;
-		$page_nr = isset($_GET['page_nr'])?intval($_GET['page_nr']) : 1;
-		$column = isset($_GET['column'])?intval($_GET['column']) : 0;
-		$date_diff = isset($_GET['date_diff'])?intval($_GET['date_diff']) : 60;
-	        if (!in_array($_GET['direction'],array(SORT_ASC,SORT_DESC))) {
-	    	    $direction = SORT_ASC;
-	        } else {
-	    	    $direction = isset($_GET['direction']) ? $_GET['direction'] : SORT_ASC;
-	        }
-		$form = new FormValidator('courselastvisit','get');
-		$form->addElement('hidden','action','courselastvisit');
-		$form->add_textfield('date_diff',get_lang('Days'),true);
-		$form->addRule('date_diff','InvalidNumber','numeric');
-		$form->addElement('style_submit_button', 'submit', get_lang('Search'),'class="search"');
-		if (!isset($_GET['date_diff'])) {
-			$defaults['date_diff'] = 60;
-		} else {
-			$defaults['date_diff'] = Security::remove_XSS($_GET['date_diff']);
-		}
-		$form->setDefaults($defaults);
-		$form->display();
-		$values = $form->exportValues();
-		$date_diff = $values['date_diff'];
-		$table = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_LASTACCESS);
-		if ($_configuration['multiple_access_urls']) {
-			$sql = "SELECT * FROM $table, $access_url_rel_course_table WHERE course_code = access_cours_code AND access_url_id='".$current_url_id."'
-				GROUP BY access_cours_code
-				HAVING access_cours_code <> ''
-				AND DATEDIFF( '".date('Y-m-d h:i:s')."' , access_date ) <= ". $date_diff;
-		} else {
-			$sql = "SELECT * FROM $table
-				GROUP BY access_cours_code
-				HAVING access_cours_code <> ''
-				AND DATEDIFF( '".date('Y-m-d h:i:s')."' , access_date ) <= ". $date_diff;
-		}
-		$res = Database::query($sql);
-		$number_of_courses = Database::num_rows($res);
-		$sql .= ' ORDER BY '.$columns[$column].' '.$sql_order[$direction];
-		$from = ($page_nr -1) * $per_page;
-		$sql .= ' LIMIT '.$from.','.$per_page;
-		echo '<p>'.get_lang('LastAccess').' &gt;= '.$date_diff.' '.get_lang('Days').'</p>';
-		$res = Database::query($sql);
-		if (Database::num_rows($res) > 0) {
-			$courses = array ();
-			while ($obj = Database::fetch_object($res)) {
-				$course = array ();
-				$course[]= '<a href="'.api_get_path(WEB_PATH).'courses/'.$obj->access_cours_code.'">'.$obj->access_cours_code.' <a>';
+        $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'])?intval($_GET['per_page']) : 10;
+        $page_nr = isset($_GET['page_nr'])?intval($_GET['page_nr']) : 1;
+        $column = isset($_GET['column'])?intval($_GET['column']) : 0;
+        $date_diff = isset($_GET['date_diff'])?intval($_GET['date_diff']) : 60;
+            if (!in_array($_GET['direction'],array(SORT_ASC,SORT_DESC))) {
+                $direction = SORT_ASC;
+            } else {
+                $direction = isset($_GET['direction']) ? $_GET['direction'] : SORT_ASC;
+            }
+        $form = new FormValidator('courselastvisit','get');
+        $form->addElement('hidden','action','courselastvisit');
+        $form->add_textfield('date_diff',get_lang('Days'),true);
+        $form->addRule('date_diff','InvalidNumber','numeric');
+        $form->addElement('style_submit_button', 'submit', get_lang('Search'),'class="search"');
+        if (!isset($_GET['date_diff'])) {
+            $defaults['date_diff'] = 60;
+        } else {
+            $defaults['date_diff'] = Security::remove_XSS($_GET['date_diff']);
+        }
+        $form->setDefaults($defaults);
+        $form->display();
+        $values = $form->exportValues();
+        $date_diff = $values['date_diff'];
+        $table = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_LASTACCESS);
+        if ($_configuration['multiple_access_urls']) {
+            $sql = "SELECT * FROM $table, $access_url_rel_course_table WHERE course_code = access_cours_code AND access_url_id='".$current_url_id."'
+                GROUP BY access_cours_code
+                HAVING access_cours_code <> ''
+                AND DATEDIFF( '".date('Y-m-d h:i:s')."' , access_date ) <= ". $date_diff;
+        } else {
+            $sql = "SELECT * FROM $table
+                GROUP BY access_cours_code
+                HAVING access_cours_code <> ''
+                AND DATEDIFF( '".date('Y-m-d h:i:s')."' , access_date ) <= ". $date_diff;
+        }
+        $res = Database::query($sql);
+        $number_of_courses = Database::num_rows($res);
+        $sql .= ' ORDER BY '.$columns[$column].' '.$sql_order[$direction];
+        $from = ($page_nr -1) * $per_page;
+        $sql .= ' LIMIT '.$from.','.$per_page;
+        echo '<p>'.get_lang('LastAccess').' &gt;= '.$date_diff.' '.get_lang('Days').'</p>';
+        $res = Database::query($sql);
+        if (Database::num_rows($res) > 0) {
+            $courses = array ();
+            while ($obj = Database::fetch_object($res)) {
+                $course = array ();
+                $course[]= '<a href="'.api_get_path(WEB_PATH).'courses/'.$obj->access_cours_code.'">'.$obj->access_cours_code.' <a>';
                                 //Allow sort by date hiding the numerical date
-				$course[] = '<span style="display:none;">'.$obj->access_date.'</span>'.api_convert_and_format_date($obj->access_date).'';
-				$courses[] = $course;
-			}
-			$parameters['action'] = 'courselastvisit';
-			$parameters['date_diff'] = $date_diff;
-			$parameters['action'] = 'courselastvisit';
-			$table_header[] = array (get_lang("CourseCode"), true);
-			$table_header[] = array (get_lang("LastAccess"), true);
-			Display :: display_sortable_table($table_header, $courses, array ('column'=>$column,'direction'=>$direction), array (), $parameters);
-		} else {
-			echo get_lang('NoSearchResults');
-		}
-	}
+                $course[] = '<span style="display:none;">'.$obj->access_date.'</span>'.api_convert_and_format_date($obj->access_date);
+                $courses[] = $course;
+            }
+            $parameters['action'] = 'courselastvisit';
+            $parameters['date_diff'] = $date_diff;
+            $parameters['action'] = 'courselastvisit';
+            $table_header[] = array (get_lang("CourseCode"), true);
+            $table_header[] = array (get_lang("LastAccess"), true);
+            Display :: display_sortable_table($table_header, $courses, array ('column'=>$column,'direction'=>$direction), array (), $parameters);
+        } else {
+            echo get_lang('NoSearchResults');
+        }
+    }
 
-	/**
-	 * Displays the statistics of the messages sent and received by each user in the social network
-	 * @param string	Type of message: 'sent' or 'received'
-	 * @return array	Message list
-	 */
-	function get_messages($message_type) {
-		global $_configuration;
-		$message_table = Database::get_main_table(TABLE_MAIN_MESSAGE);
-		$user_table = Database::get_main_table(TABLE_MAIN_USER);
-		$access_url_rel_user_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
-		$current_url_id = api_get_current_access_url_id();
-		switch ($message_type) {
-			case 'sent':
-				$field = 'user_sender_id';
-				break;
-			case 'received':
-				$field = 'user_receiver_id';
-				break;
-		}
-		if ($_configuration['multiple_access_urls']) {
-			$sql = "SELECT lastname, firstname, username,
-				COUNT($field) AS count_message
-				FROM ".$access_url_rel_user_table." as url, ".$message_table." m
-				LEFT JOIN ".$user_table." u ON m.$field = u.user_id
-				WHERE  url.user_id = m.$field AND  access_url_id='".$current_url_id."'
-				GROUP BY m.$field";
-		} else {
-			$sql = "SELECT lastname, firstname, username,
-				COUNT($field) AS count_message
-				FROM ".$message_table." m
-				LEFT JOIN ".$user_table." u ON m.$field = u.user_id
-				GROUP BY m.$field";
-		}
-		$res = Database::query($sql);
-		$messages_sent = array();
-		while ($messages = Database::fetch_array($res)) {
-			if (empty($messages['username'])) {
-				$messages['username'] = get_lang('Unknown');
-			}
-			$users = api_get_person_name($messages['firstname'], $messages['lastname']).'<br />('.$messages['username'].')';
-			$messages_sent[$users] = $messages['count_message'];
-		}
-		return $messages_sent;
-	}
+    /**
+     * Displays the statistics of the messages sent and received by each user in the social network
+     * @param string    Type of message: 'sent' or 'received'
+     * @return array    Message list
+     */
+    function get_messages($message_type) {
+        global $_configuration;
+        $message_table = Database::get_main_table(TABLE_MAIN_MESSAGE);
+        $user_table = Database::get_main_table(TABLE_MAIN_USER);
+        $access_url_rel_user_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
+        $current_url_id = api_get_current_access_url_id();
+        switch ($message_type) {
+            case 'sent':
+                $field = 'user_sender_id';
+                break;
+            case 'received':
+                $field = 'user_receiver_id';
+                break;
+        }
+        if ($_configuration['multiple_access_urls']) {
+            $sql = "SELECT lastname, firstname, username,
+                COUNT($field) AS count_message
+                FROM ".$access_url_rel_user_table." as url, ".$message_table." m
+                LEFT JOIN ".$user_table." u ON m.$field = u.user_id
+                WHERE  url.user_id = m.$field AND  access_url_id='".$current_url_id."'
+                GROUP BY m.$field";
+        } else {
+            $sql = "SELECT lastname, firstname, username,
+                COUNT($field) AS count_message
+                FROM ".$message_table." m
+                LEFT JOIN ".$user_table." u ON m.$field = u.user_id
+                GROUP BY m.$field";
+        }
+        $res = Database::query($sql);
+        $messages_sent = array();
+        while ($messages = Database::fetch_array($res)) {
+            if (empty($messages['username'])) {
+                $messages['username'] = get_lang('Unknown');
+            }
+            $users = api_get_person_name($messages['firstname'], $messages['lastname']).'<br />('.$messages['username'].')';
+            $messages_sent[$users] = $messages['count_message'];
+        }
+        return $messages_sent;
+    }
 
-	/**
-	 * Count the number of friends for social network users
-	 */
-	function get_friends() {
-		global $_configuration;
-		$user_friend_table = Database::get_main_table(TABLE_MAIN_USER_REL_USER);
-		$user_table = Database::get_main_table(TABLE_MAIN_USER);
-		$access_url_rel_user_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
-		$current_url_id = api_get_current_access_url_id();
-		if ($_configuration['multiple_access_urls']) {
-			$sql = "SELECT lastname, firstname, username,
-				COUNT(friend_user_id) AS count_friend
-				FROM ".$access_url_rel_user_table." as url, ".$user_friend_table." uf
-				LEFT JOIN ".$user_table." u ON uf.user_id = u.user_id
-				WHERE uf.relation_type <> '".USER_RELATION_TYPE_RRHH."' AND uf.user_id = url.user_id AND  access_url_id='".$current_url_id."'
-				GROUP BY uf.user_id";
-		} else {
-			$sql = "SELECT lastname, firstname, username,
-				COUNT(friend_user_id) AS count_friend
-				FROM ".$user_friend_table." uf
-				LEFT JOIN ".$user_table." u ON uf.user_id = u.user_id
-				WHERE uf.relation_type <> '".USER_RELATION_TYPE_RRHH."'
-				GROUP BY uf.user_id";
-		}
-		$res = Database::query($sql);
-		$list_friends = array();
-		while ($friends = Database::fetch_array($res)) {
-			$users = api_get_person_name($friends['firstname'], $friends['lastname']).'<br />('.$friends['username'].')';
-			$list_friends[$users] = $friends['count_friend'];
-		}
-		return $list_friends;
-	}
+    /**
+     * Count the number of friends for social network users
+     */
+    function get_friends() {
+        global $_configuration;
+        $user_friend_table = Database::get_main_table(TABLE_MAIN_USER_REL_USER);
+        $user_table = Database::get_main_table(TABLE_MAIN_USER);
+        $access_url_rel_user_table= Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
+        $current_url_id = api_get_current_access_url_id();
+        if ($_configuration['multiple_access_urls']) {
+            $sql = "SELECT lastname, firstname, username,
+                COUNT(friend_user_id) AS count_friend
+                FROM ".$access_url_rel_user_table." as url, ".$user_friend_table." uf
+                LEFT JOIN ".$user_table." u ON uf.user_id = u.user_id
+                WHERE uf.relation_type <> '".USER_RELATION_TYPE_RRHH."' AND uf.user_id = url.user_id AND  access_url_id='".$current_url_id."'
+                GROUP BY uf.user_id";
+        } else {
+            $sql = "SELECT lastname, firstname, username,
+                COUNT(friend_user_id) AS count_friend
+                FROM ".$user_friend_table." uf
+                LEFT JOIN ".$user_table." u ON uf.user_id = u.user_id
+                WHERE uf.relation_type <> '".USER_RELATION_TYPE_RRHH."'
+                GROUP BY uf.user_id";
+        }
+        $res = Database::query($sql);
+        $list_friends = array();
+        while ($friends = Database::fetch_array($res)) {
+            $users = api_get_person_name($friends['firstname'], $friends['lastname']).'<br />('.$friends['username'].')';
+            $list_friends[$users] = $friends['count_friend'];
+        }
+        return $list_friends;
+    }
 }