chamilo-lms/main/work/upload.php

<?php
/* For licensing terms, see /license.txt */

require_once '../inc/global.inc.php';
$current_course_tool  = TOOL_STUDENTPUBLICATION;

api_protect_course_script(true);

// Including necessary files
require_once 'work.lib.php';

$this_section = SECTION_COURSES;

$work_id = isset($_REQUEST['id']) ? intval($_REQUEST['id']) : null;

$is_allowed_to_edit = api_is_allowed_to_edit();
$course_id = api_get_course_int_id();
$user_id = api_get_user_id();
$userInfo = api_get_user_info();
$session_id = api_get_session_id();
$course_info = api_get_course_info();
$course_code = $course_info['code'];
$group_id = api_get_group_id();

if (empty($work_id)) {
    api_not_allowed(true);
}

protectWork($course_info, $work_id);
$workInfo = get_work_data_by_id($work_id);
$is_course_member = CourseManager::is_user_subscribed_in_real_or_linked_course(
    $user_id,
    $course_id,
    $session_id
);
$is_course_member = $is_course_member || api_is_platform_admin();

if ($is_course_member == false || api_is_invitee()) {
    api_not_allowed(true);
}

$check = Security::check_token('post');
$token = Security::get_token();

$student_can_edit_in_session = api_is_allowed_to_session_edit(false, true);

//  @todo add an option to allow/block multiple attempts.
/*
if (!empty($workInfo) && !empty($workInfo['qualification'])) {
    $count =  get_work_count_by_student($user_id, $work_id);
    if ($count >= 1) {
        Display::display_header();
        if (api_get_course_setting('student_delete_own_publication') == '1') {
            Display::display_warning_message(get_lang('CantUploadDeleteYourPaperFirst'));
        } else {
            Display::display_warning_message(get_lang('YouAlreadySentAPaperYouCantUpload'));
        }
        Display::display_footer();
        exit;
    }
}*/

$homework = get_work_assignment_by_id($workInfo['id']);
$validationStatus = getWorkDateValidationStatus($homework);

$interbreadcrumb[] = array(
    'url' => api_get_path(WEB_CODE_PATH).'work/work.php?'.api_get_cidreq(),
    'name' => get_lang('StudentPublications'),
);
$interbreadcrumb[] = array(
    'url' => api_get_path(WEB_CODE_PATH).'work/work_list.php?'.api_get_cidreq().'&id='.$work_id,
    'name' => $workInfo['title'],
);
$interbreadcrumb[] = array('url' => '#', 'name' => get_lang('UploadADocument'));

$form = new FormValidator(
    'form',
    'POST',
    api_get_self()."?".api_get_cidreq()."&id=".$work_id,
    '',
    array('enctype' => "multipart/form-data")
);

setWorkUploadForm($form, $workInfo['allow_text_assignment']);

$form->addElement('hidden', 'id', $work_id);
$form->addElement('hidden', 'sec_token', $token);

$succeed = false;
if ($form->validate()) {

    if ($student_can_edit_in_session && $check) {
        $values = $form->getSubmitValues();
        // Process work
        processWorkForm(
            $workInfo,
            $values,
            $course_info,
            $session_id,
            $group_id,
            $user_id
        );
        $script = 'work_list.php';
        if ($is_allowed_to_edit) {
            $script = 'work_list_all.php';
        }
        header('Location: '.api_get_path(WEB_CODE_PATH).'work/'.$script.'?'.api_get_cidreq().'&id='.$work_id);
        exit;
    } else {
        // Bad token or can't add works
        Display::addFlash(
            Display::return_message(get_lang('IsNotPosibleSaveTheDocument'), 'error')
        );
    }
}

$url = api_get_path(WEB_AJAX_PATH).'work.ajax.php?'.api_get_cidreq().'&a=upload_file&id='.$work_id;

$htmlHeadXtra[] = api_get_jquery_libraries_js(array('jquery-ui', 'jquery-upload'));
$htmlHeadXtra[] = to_javascript_work();
Display :: display_header(null);

$headers = array(
    get_lang('Upload'),
    get_lang('Upload').' ('.get_lang('Simple').')',
);

$multipleForm = new FormValidator('post');
$multipleForm->addMultipleUpload($url);

$tabs = Display::tabs($headers, array($multipleForm->returnForm(), $form->returnForm()), 'tabs');

if (!empty($work_id)) {
    echo $validationStatus['message'];
    if ($is_allowed_to_edit) {
        if (api_resource_is_locked_by_gradebook($work_id, LINK_STUDENTPUBLICATION)) {
            echo Display::display_warning_message(get_lang('ResourceLockedByGradebook'));
        } else {
            echo $tabs;
        }
    } elseif ($student_can_edit_in_session && $validationStatus['has_ended'] == false) {
        echo $tabs;
    } else {
        Display::addFlash(Display::return_message(get_lang('ActionNotAllowed'), 'error'));
    }
} else {
    Display::addFlash(Display::return_message(get_lang('ActionNotAllowed'), 'error'));
}

Display :: display_footer();