<?php
/* For licensing terms, see /license.txt */
/**
 * Student report
 * @package chamilo.reporting
 */

 // name of the language file that needs to be included
$language_file = array ('tracking', 'admin');
$cidReset = true;

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

$nameTools = get_lang('Students');

$export_csv = isset($_GET['export']) && $_GET['export'] == 'csv' ? true : false;
$keyword = isset($_GET['keyword']) ? Security::remove_XSS($_GET['keyword']) : null;
$active = isset($_GET['active']) ? intval($_GET['active']) : 1;
$sleepingDays = isset($_GET['sleeping_days']) ? intval($_GET['sleeping_days']) : null;

api_block_anonymous_users();

$this_section = SECTION_TRACKING;

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

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

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

function get_count_users()
{
    $keyword = isset($_GET['keyword']) ? Security::remove_XSS($_GET['keyword']) : null;
    $active = isset($_GET['active']) ? intval($_GET['active']) : 1;
    $sleepingDays = isset($_GET['sleeping_days']) ? intval($_GET['sleeping_days']) : null;

    $lastConnectionDate = null;
    if (!empty($sleepingDays)) {
        $lastConnectionDate = api_get_utc_datetime(strtotime($sleepingDays.' days ago'));
    }
    $count = SessionManager::getCountUserTracking(
        $keyword,
        $active,
        $lastConnectionDate,
        null,
        null,
        api_is_student_boss() ? null : STUDENT
    );
    return $count;
}

function get_users($from, $limit, $column, $direction)
{
    $active = isset($_GET['active']) ? $_GET['active'] : 1;
    $keyword = isset($_GET['keyword']) ? Security::remove_XSS($_GET['keyword']) : null;
    $sleepingDays = isset($_GET['sleeping_days']) ? intval($_GET['sleeping_days']) : null;

    $lastConnectionDate = null;
    if (!empty($sleepingDays)) {
        $lastConnectionDate = api_get_utc_datetime(strtotime($sleepingDays.' days ago'));
    }
    $is_western_name_order = api_is_western_name_order();
    $coach_id = api_get_user_id();

    $drhLoaded = false;

    if (api_is_drh()) {
        $column = 'u.user_id';
        if (api_drh_can_access_all_session_content()) {
            $students = SessionManager::getAllUsersFromCoursesFromAllSessionFromStatus(
                'drh_all',
                api_get_user_id(),
                false,
                $from,
                $limit,
                $column,
                $direction,
                $keyword,
                $active,
                $lastConnectionDate,
                null,
                null,
                api_is_student_boss() ? null : STUDENT
            );
            $drhLoaded = true;
        }
    }

    if ($drhLoaded == false) {
        $students = UserManager::getUsersFollowedByUser(
            api_get_user_id(),
            api_is_student_boss() ? null : STUDENT,
            false,
            false,
            false,
            $from,
            $limit,
            $column,
            $direction,
            $active,
            $lastConnectionDate,
            api_is_student_boss() ? STUDENT_BOSS : COURSEMANAGER,
            $keyword
        );
    }

    $all_datas = array();

    foreach ($students as $student_data) {
        $student_id = $student_data['user_id'];
        if (isset($_GET['id_session'])) {
            $courses = Tracking :: get_course_list_in_session_from_student($student_id, $_GET['id_session']);
        }

        $avg_time_spent = $avg_student_score = $avg_student_progress = $total_assignments = $total_messages = 0;
        $nb_courses_student = 0;
        if (!empty($courses)) {
            foreach ($courses as $course_code) {
                $courseInfo = api_get_course_info($course_code);
                $courseId = $courseInfo['real_id'];
                if (CourseManager :: is_user_subscribed_in_course($student_id, $course_code, true)) {
                    $avg_time_spent 	+= Tracking :: get_time_spent_on_the_course($student_id, $courseId, $_GET['id_session']);
                    $my_average 		 = Tracking :: get_avg_student_score($student_id, $course_code);
                    if (is_numeric($my_average)) {
                        $avg_student_score += $my_average;
                    }
                    $avg_student_progress += Tracking :: get_avg_student_progress($student_id, $course_code);
                    $total_assignments += Tracking :: count_student_assignments($student_id, $course_code);
                    $total_messages += Tracking :: count_student_messages($student_id, $course_code);
                    $nb_courses_student++;
                }
            }
        }

        if ($nb_courses_student > 0) {
            $avg_time_spent = $avg_time_spent / $nb_courses_student;
            $avg_student_score = $avg_student_score / $nb_courses_student;
            $avg_student_progress = $avg_student_progress / $nb_courses_student;
        } else {
            $avg_time_spent = null;
            $avg_student_score = null;
            $avg_student_progress = null;
        }

        $row = array();
        if ($is_western_name_order) {
            $row[] = $student_data['firstname'];
            $row[] = $student_data['lastname'];
        } else {
            $row[] = $student_data['lastname'];
            $row[] = $student_data['firstname'];
        }
        $string_date = Tracking::get_last_connection_date($student_id, true);
        $first_date = Tracking::get_first_connection_date($student_id);
        $row[] = $first_date;
        $row[] = $string_date;

        if (isset($_GET['id_coach']) && intval($_GET['id_coach']) != 0) {
            $detailsLink = '<a href="myStudents.php?student='.$student_id.'&id_coach='.$coach_id.'&id_session='.$_GET['id_session'].'">
				          <img src="'.api_get_path(WEB_IMG_PATH).'2rightarrow.gif" border="0" /></a>';
        } else {
            $detailsLink =  '<a href="myStudents.php?student='.$student_id.'">
				             <img src="'.api_get_path(WEB_IMG_PATH).'2rightarrow.gif" border="0" /></a>';
        }
        $row[] = $detailsLink;
        $all_datas[] = $row;
    }
    return $all_datas;
}

if ($export_csv) {
    $is_western_name_order = api_is_western_name_order(PERSON_NAME_DATA_EXPORT);
} else {
    $is_western_name_order = api_is_western_name_order();
}

$sort_by_first_name = api_sort_by_first_name();
$actions = '<div class="actions">';

if (api_is_drh()) {
    $menu_items = array(
        Display::url(Display::return_icon('stats.png', get_lang('MyStats'), '', ICON_SIZE_MEDIUM), api_get_path(WEB_CODE_PATH)."auth/my_progress.php" ),
        Display::url(Display::return_icon('user_na.png', get_lang('Students'), array(), ICON_SIZE_MEDIUM), '#'),
        Display::url(Display::return_icon('teacher.png', get_lang('Trainers'), array(), ICON_SIZE_MEDIUM), 'teachers.php'),
        Display::url(Display::return_icon('course.png', get_lang('Courses'), array(), ICON_SIZE_MEDIUM), 'course.php'),
        Display::url(Display::return_icon('session.png', get_lang('Sessions'), array(), ICON_SIZE_MEDIUM), 'session.php'),
        Display::url(
            Display::return_icon('skills.png', get_lang('Skills'), array(), ICON_SIZE_MEDIUM),
            'skills.php'
        )
    );

    $nb_menu_items = count($menu_items);
    if ($nb_menu_items > 1) {
        foreach ($menu_items as $key => $item) {
            $actions .= $item;
        }
    }
} else if (api_is_student_boss()) {
    $actions .= Display::url(
        Display::return_icon('stats.png', get_lang('MyStats'), '', ICON_SIZE_MEDIUM),
        api_get_path(WEB_CODE_PATH)."auth/my_progress.php"
    );
    $actions .= Display::url(
        Display::return_icon('user_na.png', get_lang('Students'), array(), ICON_SIZE_MEDIUM),
        '#'
    );
    $actions .= Display::url(
        Display::return_icon("statistics.png", get_lang("CompanyReport"), array(), ICON_SIZE_MEDIUM),
        api_get_path(WEB_CODE_PATH) . "mySpace/company_reports.php"
    );
}

$actions .= '<span style="float:right">';
$actions .= Display::url(
    Display::return_icon('printer.png', get_lang('Print'), array(), ICON_SIZE_MEDIUM), 'javascript: void(0);',
    array('onclick'=>'javascript: window.print();')
);
$actions .= Display::url(
    Display::return_icon('export_csv.png', get_lang('ExportAsCSV'), array(), ICON_SIZE_MEDIUM),
    api_get_self().'?export=csv&keyword='.$keyword
);
$actions .= '</span>';
$actions .= '</div>';

$table = new SortableTable(
    'tracking_student',
    'get_count_users',
    'get_users',
    ($is_western_name_order xor $sort_by_first_name) ? 1 : 0,
    10
);

$params = array(
    'keyword' => $keyword,
    'active' => $active,
    'sleeping_days' => $sleepingDays
);
$table->set_additional_parameters($params);

if ($is_western_name_order) {
    $table->set_header(0, get_lang('FirstName'), false);
    $table->set_header(1, get_lang('LastName'), false);
} else {
    $table->set_header(0, get_lang('LastName'), false);
    $table->set_header(1, get_lang('FirstName'), false);
}

$table->set_header(2, get_lang('FirstLogin'), false);
$table->set_header(3, get_lang('LastConnexion'), false);
$table->set_header(4, get_lang('Details'), false);

if ($export_csv) {
    if ($is_western_name_order) {
        $csv_header[] = array(
            get_lang('FirstName'),
            get_lang('LastName'),
            get_lang('FirstLogin'),
            get_lang('LastConnexion')
        );
    } else {
        $csv_header[] = array(
            get_lang('LastName'),
            get_lang('FirstName'),
            get_lang('FirstLogin'),
            get_lang('LastConnexion')
        );
    }
}

$form = new FormValidator('search_user', 'get', api_get_path(WEB_CODE_PATH).'mySpace/student.php');
$form = Tracking::setUserSearchForm($form);
$form->setDefaults($params);

if ($export_csv) {
    // send the csv file if asked
    $content = $table->get_table_data();

    foreach ($content as &$row) {
        unset($row[4]);
    }
    $csv_content = array_merge($csv_header, $content);
    ob_end_clean();
    Export :: export_table_csv($csv_content, 'reporting_student_list');
    exit;
} else {
    Display::display_header($nameTools);
    echo $actions;
    $page_title = get_lang('Students');
    echo Display::page_subheader($page_title);
    if (isset($active)) {
        if ($active) {
            $activeLabel = get_lang('ActiveUsers');
        } else {
            $activeLabel = get_lang('InactiveUsers');
        }
        echo Display::page_subheader2($activeLabel);
    }
    $form->display();
    $table->display();
}

Display :: display_footer();