/php/main/mySpace/course.php

<?php
/* For licensing terms, see /license.txt */
/**
 * Courses reporting
 * @package chamilo.reporting
 */
/**
 * Code
 */
ob_start();
$nameTools = 'Cours';
// name of the language file that needs to be included
$language_file = array ('admin', 'registration', 'index', 'tracking');
$cidReset = true;

require_once '../inc/global.inc.php';
require_once api_get_path(LIBRARY_PATH).'export.lib.inc.php';
require_once api_get_path(LIBRARY_PATH).'thematic.lib.php';

$this_section = SECTION_TRACKING;
$id_session = intval($_GET['id_session']);

api_block_anonymous_users();
$interbreadcrumb[] = array ("url" => "index.php", "name" => get_lang('MySpace'));

if (isset($_GET["id_session"]) && $_GET["id_session"] != "") {
	$interbreadcrumb[] = array ("url" => "session.php", "name" => get_lang('Sessions'));
}

if (isset($_GET["user_id"]) && $_GET["user_id"] != "" && isset($_GET["type"]) && $_GET["type"] == "coach") {
	 $interbreadcrumb[] = array ("url" => "coaches.php", "name" => get_lang('Tutors'));
}

if (isset($_GET["user_id"]) && $_GET["user_id"] != "" && isset($_GET["type"]) && $_GET["type"] == "student") {
	 $interbreadcrumb[] = array ("url" => "student.php", "name" => get_lang('Students'));
}

if (isset($_GET["user_id"]) && $_GET["user_id"] != "" && !isset($_GET["type"])) {
	 $interbreadcrumb[] = array ("url" => "teachers.php", "name" => get_lang('Teachers'));
}

function count_courses() {
	global $nb_courses;
	return $nb_courses;
}

//checking if the current coach is the admin coach
$show_import_icon = false;

if (api_get_setting('add_users_by_coach') == 'true') {
	if (!api_is_platform_admin()) {
		$sql = 'SELECT id_coach FROM '.Database :: get_main_table(TABLE_MAIN_SESSION).' WHERE id='.$id_session;
		$rs = Database::query($sql);
		if (Database::result($rs, 0, 0) != $_user['user_id']) {
			api_not_allowed(true);
		} else {
			$show_import_icon=true;
		}
	}
}

Display :: display_header($nameTools);

$a_courses = array();
if (api_is_drh() || api_is_session_admin() || api_is_platform_admin()) {

	$title = '';
	if (empty($id_session)) {
		if (isset($_GET['user_id'])) {
			$user_id = intval($_GET['user_id']);
			$user_info = api_get_user_info($user_id);
			$title = get_lang('AssignedCoursesTo').' '.api_get_person_name($user_info['firstname'], $user_info['lastname']);
			$courses  = CourseManager::get_course_list_of_user_as_course_admin($user_id);
		} else {
			$title = get_lang('YourCourseList');
			$courses = CourseManager::get_courses_followed_by_drh($_user['user_id']);
		}
	} else {
		$session_name = api_get_session_name($id_session);
		$title = api_htmlentities($session_name,ENT_QUOTES,$charset).' : '.get_lang('CourseListInSession');
		$courses = Tracking::get_courses_list_from_session($id_session);
	}

	$a_courses = array_keys($courses);

	if (!api_is_session_admin()) {		
		$menu_items[] = Display::url(Display::return_icon('stats.png', get_lang('MyStats'),'',ICON_SIZE_MEDIUM),api_get_path(WEB_CODE_PATH)."auth/my_progress.php" );
		$menu_items[] = Display::url(Display::return_icon('user.png', get_lang('Students'), array(), 32), "index.php?view=drh_students&amp;display=yourstudents");
		$menu_items[] = Display::url(Display::return_icon('teacher.png', get_lang('Trainers'), array(), 32), 'teachers.php');
		$menu_items[] = Display::return_icon('course_na.png', get_lang('Courses'), array(), 32);
		$menu_items[] = Display::url(Display::return_icon('session.png', get_lang('Sessions'), array(), 32), 'session.php');
	}

	echo '<div class="actions">';
	$nb_menu_items = count($menu_items);
	if ($nb_menu_items > 1) {
		foreach ($menu_items as $key => $item) {
			echo $item;		
		}
	}
	if (count($a_courses) > 0) {
		echo '<span style="float:right">';
		echo Display::url(Display::return_icon('printer.png', get_lang('Print'), array(), 32), 'javascript: void(0);', array('onclick'=>'javascript: window.print();'));
		echo '</span>';
	}
	echo '</div>';
	echo Display::page_header($title);
}

// Database Table Definitions
$tbl_session_course_user 	= Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
$tbl_user_course            = Database::get_main_table(TABLE_MAIN_COURSE_USER);

if (isset($_GET['action'])) {
	if ($_GET['action'] == 'show_message') {
		Display :: display_normal_message(stripslashes($_GET['message']), false);
	}

	if ($_GET['action'] == 'error_message') {
		Display :: display_error_message(stripslashes($_GET['message']), false);
	}
}

if ($show_import_icon) {
	echo "<div align=\"right\">";
	echo '<a href="user_import.php?id_session='.$id_session.'&action=export&amp;type=xml">'.Display::return_icon('excel.gif', get_lang('ImportUserListXMLCSV')).'&nbsp;'.get_lang('ImportUserListXMLCSV').'</a>';
	echo "</div><br />";
}

if (!api_is_drh() && !api_is_session_admin() && !api_is_platform_admin()) {
	$courses = Tracking::get_courses_followed_by_coach($_user['user_id'], $id_session);
	$a_courses = array_keys($courses);
}

$nb_courses = count($a_courses);

$table = new SortableTable('tracking_list_course', 'count_courses');
$table -> set_header(0, get_lang('CourseTitle'), false);
$table -> set_header(1, get_lang('NbStudents'), false);
$table -> set_header(2, get_lang('TimeSpentInTheCourse').Display :: return_icon('info3.gif', get_lang('TimeOfActiveByTraining'), array('align' => 'absmiddle', 'hspace' => '3px')), false);
$table -> set_header(3, get_lang('ThematicAdvance'), false);
$table -> set_header(4, get_lang('AvgStudentsProgress').Display :: return_icon('info3.gif', get_lang('AvgAllUsersInAllCourses'), array('align' => 'absmiddle', 'hspace' => '3px')), false);
$table -> set_header(5, get_lang('AvgCourseScore').Display :: return_icon('info3.gif', get_lang('AvgAllUsersInAllCourses'), array('align' => 'absmiddle', 'hspace' => '3px')), false);
//$table -> set_header(5, get_lang('AvgExercisesScore'), false);// no code for this?
$table -> set_header(6, get_lang('AvgMessages'), false);
$table -> set_header(7, get_lang('AvgAssignments'), false);
$table -> set_header(8, get_lang('Details'), false);

$csv_header[] = array(
	get_lang('CourseTitle', ''),
	get_lang('NbStudents', ''),
	get_lang('TimeSpentInTheCourse', ''),
	get_lang('ThematicAdvance', ''),
	get_lang('AvgStudentsProgress', ''),
	get_lang('AvgCourseScore', ''),
	//get_lang('AvgExercisesScore', ''),
	get_lang('AvgMessages', ''),
	get_lang('AvgAssignments', '')
);

if (is_array($a_courses)) {
	foreach ($a_courses as $course_code) {
		$nb_students_in_course = 0;
		$course = CourseManager :: get_course_information($course_code);
		$avg_assignments_in_course = $avg_messages_in_course = $avg_progress_in_course = $avg_score_in_course = $avg_time_spent_in_course = 0;

		// students directly subscribed to the course
		if (empty($id_session)) {
			$sql = "SELECT user_id FROM $tbl_user_course as course_rel_user WHERE course_rel_user.status='5' AND course_rel_user.course_code='$course_code'";
		} else {
			$sql = "SELECT id_user as user_id FROM $tbl_session_course_user srcu WHERE  srcu. course_code='$course_code' AND id_session = '$id_session' AND srcu.status<>2";
		}

		$rs = Database::query($sql);
		$users = array();
		while ($row = Database::fetch_array($rs)) { $users[] = $row['user_id']; }

		if (count($users) > 0) {
			$nb_students_in_course = count($users);
			// tracking datas
			$avg_progress_in_course = Tracking :: get_avg_student_progress ($users, $course_code, array(), $id_session);
			$avg_score_in_course = Tracking :: get_avg_student_score ($users, $course_code, array(), $id_session);
			$avg_time_spent_in_course = Tracking :: get_time_spent_on_the_course ($users, $course_code, $id_session);
			$messages_in_course = Tracking :: count_student_messages ($users, $course_code, $id_session);
			$assignments_in_course = Tracking :: count_student_assignments ($users, $course_code, $id_session);

			$avg_time_spent_in_course = api_time_to_hms($avg_time_spent_in_course / $nb_students_in_course);
			$avg_progress_in_course = round($avg_progress_in_course / $nb_students_in_course, 2);
			
			if (is_numeric($avg_score_in_course)) {
				$avg_score_in_course = round($avg_score_in_course / $nb_students_in_course, 2).'%';
			}

		} else {
			$avg_time_spent_in_course = null;
			$avg_progress_in_course = null;
			$avg_score_in_course = null;
			$messages_in_course = null;
			$assignments_in_course = null;
		}

		$tematic_advance_progress = 0;
		$thematic = new Thematic();
		$tematic_advance = $thematic->get_total_average_of_thematic_advances($course_code, $id_session);		

		if (!empty($tematic_advance)) {
			$tematic_advance_csv = $tematic_advance_progress.'%';
			$tematic_advance_progress = '<a title="'.get_lang('GoToThematicAdvance').'" href="'.api_get_path(WEB_CODE_PATH).'course_progress/index.php?cidReq='.$course_code.'&id_session='.$id_session.'">'.$tematic_advance.'%</a>';
		} else {
			$tematic_advance_progress = '-';
		}

		$table_row = array();
		$table_row[] = $course['title'];
		$table_row[] = $nb_students_in_course;
		$table_row[] = is_null($avg_time_spent_in_course)?'-':$avg_time_spent_in_course;
		$table_row[] = $tematic_advance_progress;
		$table_row[] = is_null($avg_progress_in_course) ? '-' : $avg_progress_in_course.'%';
		$table_row[] = is_null($avg_score_in_course) ? '-' : $avg_score_in_course;
		$table_row[] = is_null($messages_in_course)?'-':$messages_in_course;
		$table_row[] = is_null($assignments_in_course)?'-':$assignments_in_course;
		$table_row[] = '<a href="../tracking/courseLog.php?cidReq='.$course_code.'&id_session='.$id_session.'"><img src="'.api_get_path(WEB_IMG_PATH).'2rightarrow.gif" border="0" /></a>';

		$csv_content[] = array (
			$course['title'],
			$nb_students_in_course,
			$avg_time_spent_in_course,
			$tematic_advance_csv,
			is_null($avg_progress_in_course) ? null : $avg_progress_in_course.'%',
			is_null($avg_score_in_course) ? null : $avg_score_in_course,
			$messages_in_course,
			$assignments_in_course,
		);

		$table -> addRow($table_row, 'align="right"');
	}

	// $csv_content = array_merge($csv_header, $csv_content); // Before this statement you are allowed to sort (in different way) the array $csv_content.
}
//$table -> setColAttributes(0);
//$table -> setColAttributes(7);
$table -> display();

Display :: display_footer();