<?php

/* For licensing terms, see /license.txt */

/**
 * This tool allows platform admins to export courses to CSV file.
 */
$cidReset = true;

require_once __DIR__.'/../inc/global.inc.php';

$this_section = SECTION_PLATFORM_ADMIN;
api_protect_admin_script();

$tool_name = get_lang('ExportCourses');
$interbreadcrumb[] = ['url' => 'index.php', 'name' => get_lang('PlatformAdmin')];

set_time_limit(0);

$course_list = CourseManager::get_courses_list(
    0,
    0,
    'title',
    'ASC',
    -1,
    '',
    api_get_current_access_url_id()
);
$formSent = null;
$courses = $selected_courses = [];

if (isset($_POST['formSent']) && $_POST['formSent']) {
    $formSent = $_POST['formSent'];
    $select_type = (int) ($_POST['select_type']);
    $file_type = $_POST['file_type'];
    $includeUsers = (empty($_POST['include_users']) ? false : true);
    $includeExtraFields = (isset($_POST['include_extrafields']) && 1 === (int) $_POST['include_extrafields']);

    if (2 == $select_type) {
        // Get selected courses from courses list in form sent
        $selected_courses = $_POST['course_code'];
        if (is_array($selected_courses)) {
            foreach ($course_list as $course) {
                if (!in_array($course['code'], $selected_courses)) {
                    continue;
                }
                $courses[$course['real_id']] = $course;
            }
        }
    } else {
        // Get all courses
        foreach ($course_list as $course) {
            $courses[$course['real_id']] = $course;
        }
    }

    if (!empty($courses)) {
        $archiveFile = 'export_courses_list_'.api_get_local_time();
        $listToExport[] = [
            'Code',
            'Title',
            'CourseCategory',
            'CourseCategoryName',
            'Teacher',
            'Language',
            'Visibility',
        ];
        if ($includeUsers) {
            $listToExport[0][] = 'Users';
            $listToExport[0][] = 'OtherTeachers';
        }
        if ($includeExtraFields) {
            $extraField = new ExtraField('course');
            $allExtraFields = $extraField->get_all();
            foreach ($allExtraFields as $extra) {
                $listToExport[0][] = $extra['display_text'];
            }
        }
        $dataToExport = [];
        foreach ($courses as $courseId => $course) {
            $dataToExport['code'] = str_replace(';', ',', $course['code']);
            $dataToExport['title'] = str_replace(';', ',', $course['title']);
            $dataToExport['category_code'] = str_replace(';', ',', $course['category_code']);
            $categoryInfo = CourseCategory::getCategory($course['category_code']);
            if ($categoryInfo) {
                $dataToExport['category_name'] = str_replace(';', ',', $categoryInfo['name']);
            } else {
                $dataToExport['category_name'] = '';
            }
            $dataToExport['tutor_name'] = str_replace(';', ',', $course['tutor_name']);
            $dataToExport['course_language'] = str_replace(';', ',', $course['course_language']);
            $dataToExport['visibility'] = str_replace(';', ',', $course['visibility']);

            if ($includeUsers) {
                $dataToExport['students'] = '';
                $dataToExport['teachers'] = '';
                $usersInCourse = CourseManager::get_user_list_from_course_code($course['code']);

                if (is_array($usersInCourse) && !empty($usersInCourse)) {
                    foreach ($usersInCourse as $user) {
                        if ($user['status_rel'] == COURSEMANAGER) {
                            $dataToExport['teachers'] .= $user['username'].'|';
                        } else {
                            $dataToExport['students'] .= $user['username'].'|';
                        }
                    }
                }
                $dataToExport['students'] = substr($dataToExport['students'], 0, -1);
                $dataToExport['teachers'] = substr($dataToExport['teachers'], 0, -1);
            }
            $listToExport[$courseId] = $dataToExport;
        }

        if ($includeExtraFields) {
            foreach ($allExtraFields as $extra) {
                $default = $extraField->getDefaultValueByFieldId($extra['id']);
                $fieldValues = $extraField->getAllValuesByFieldId($extra['id']);
                foreach ($listToExport as $courseId => &$values) {
                    if ($courseId === 0) {
                        continue;
                    }
                    if (isset($fieldValues[$courseId])) {
                        if (is_array($fieldValues[$courseId])) {
                            $values['extra_'.$extra['variable']] = $fieldValues[$courseId];
                        } else {
                            $values[$extra['variable']] = $fieldValues[$courseId];
                        }
                    } else {
                        $values[$extra['variable']] = $default;
                    }
                }
            }
        }

        switch ($file_type) {
            case 'xml':
                // Remove header
                unset($listToExport[0]);
                Export::arrayToXml($listToExport, $archiveFile);
                break;
            case 'csv':
                Export::arrayToCsv($listToExport, $archiveFile);
                break;
            case 'xls':
                Export::arrayToXls($listToExport, $archiveFile);
                break;
        }
    } else {
        Display::addFlash(
            Display::return_message(
                get_lang('ThereAreNotSelectedCoursesOrCoursesListIsEmpty')
            )
        );
    }
}

Display::display_header($tool_name);

$form = new FormValidator('export', 'post', api_get_self());
$form->addHeader($tool_name);
$form->addHidden('formSent', 1);
$form->addElement(
    'radio',
    'select_type',
    get_lang('Option'),
    get_lang('ExportAllCoursesList'),
    '1',
    ['onclick' => "javascript: if(this.checked){document.getElementById('div-course-list').style.display='none';}"]
);

$form->addElement(
    'radio',
    'select_type',
    '',
    get_lang('ExportSelectedCoursesFromCoursesList'),
    '2',
    ['onclick' => "javascript: if(this.checked){document.getElementById('div-course-list').style.display='block';}"]
);

if (!empty($course_list)) {
    $form->addHtml('<div id="div-course-list" style="display:none">');
    $coursesInList = [];
    foreach ($course_list as $course) {
        $coursesInList[$course['code']] = $course['title'].' ('.$course['code'].')';
    }

    $form->addSelect(
        'course_code',
        get_lang('WhichCoursesToExport'),
        $coursesInList,
        ['multiple' => 'multiple']
    );

    $form->addHtml('</div>');
}

$form->addElement('radio', 'file_type', get_lang('OutputFileType'), 'CSV', 'csv', null);
$form->addElement('radio', 'file_type', '', 'XLS', 'xls', null);
$form->addElement('radio', 'file_type', null, 'XML', 'xml', null, ['id' => 'file_type_xml']);

$form->addElement('checkbox', 'include_users', get_lang('ExportUsers'), '', '1');

$form->addElement('checkbox', 'include_extrafields', get_lang('ExportExtraFields'), '', '1');

$form->setDefaults(['select_type' => '1', 'file_type' => 'csv', 'include_users' => '1', 'include_extrafields' => 0]);

$form->addButtonExport(get_lang('ExportCourses'));
$form->display();

Display::display_footer();