Esempio n. 1
0
 static function download()
 {
     global $wpdb, $user_ID;
     // only do this when the URL contains watupro_download_file=$file_id
     if (empty($_GET['watupro_download_file']) or empty($_GET['id']) or !is_numeric($_GET['id'])) {
         return true;
     }
     if (!is_user_logged_in()) {
         wp_die(__('Only logged in users can download uploaded files.', 'watupro'));
     }
     // select the uploaded file
     $file = $wpdb->get_row($wpdb->prepare("SELECT ID, user_id, user_answer_id, filename, filesize, filetype \n\t\t\tFROM " . WATUPRO_USER_FILES . " WHERE ID=%d", $_GET['id']));
     if (empty($file->ID)) {
         wp_die(__('The file has been deleted.', 'watupro'));
     }
     // check access
     if ($file->user_id != $user_ID) {
         if (!current_user_can(WATUPRO_MANAGE_CAPS)) {
             wp_die(__('You can only download your own files.', 'watupro'));
         }
         // manager. Let's see if he's allowed to see this file
         $multiuser_access = 'all';
         if (watupro_intel()) {
             $multiuser_access = WatuPROIMultiUser::check_access('exams_access');
         }
         if ($multiuser_access == 'own') {
             $exam_id = $wpdb->get_var($wpdb->prepare("SELECT exam_id FROM " . WATUPRO_STUDENT_ANSWERS . " WHERE\n\t\t\t\t\tID=%d", $file->user_answer_id));
             $editor_id = $wpdb->get_var($wpdb->prepare("SELECT editor_id FROM \n\t\t\t\t\t" . WATUPRO_EXAMS . " WHERE ID=%d", $exam_id));
             if ($editor_id != $user_ID) {
                 wp_die(__('You can download only files of your own students.', 'watupro'));
             }
         }
     }
     // all good, let's download
     $content = $wpdb->get_var($wpdb->prepare("SELECT BINARY filecontents \n\t\t\tFROM " . WATUPRO_USER_FILES . " WHERE ID=%d", $file->ID));
     header("Content-Length: " . strlen($content));
     header("Content-Description: File Transfer");
     header("Content-type: application/octet-stream");
     header("Content-Disposition: attachment; filename=\"" . $file->filename . "\"");
     header("Content-Transfer-Encoding: binary");
     echo $content;
     exit;
 }
Esempio n. 2
0
function watupro_question_cats()
{
    global $wpdb, $user_ID;
    $multiuser_access = 'all';
    if (watupro_intel()) {
        $multiuser_access = WatuPROIMultiUser::check_access('qcats_access');
    }
    $error = false;
    if (!empty($_POST['add'])) {
        if (!WTPCategory::add($_POST['name'], $_POST['description'])) {
            $error = __('Another category with this name already exists.', 'watupro');
        }
    }
    if (!empty($_POST['save'])) {
        if ($multiuser_access == 'own') {
            $cat = $wpdb->get_row($wpdb->prepare("SELECT * FROM " . WATUPRO_QCATS . " WHERE ID=%d", $_POST['id']));
            if ($cat->editor_id != $user_ID) {
                wp_die(__('You can manage only your own categories', 'watupro'));
            }
        }
        if (!WTPCategory::save($_POST['name'], $_POST['id'], $_POST['description'])) {
            $error = __('Another category with this name already exists.', 'watupro');
        }
    }
    if (!empty($_POST['del'])) {
        if ($multiuser_access == 'own') {
            $cat = $wpdb->get_row($wpdb->prepare("SELECT * FROM " . WATUPRO_QCATS . " WHERE ID=%d", $_POST['id']));
            if ($cat->editor_id != $user_ID) {
                wp_die(__('You can manage only your own categories', 'watupro'));
            }
        }
        WTPCategory::delete($_POST['id']);
    }
    // select all question categories
    $own_sql = $multiuser_access == 'own' ? $wpdb->prepare(" WHERE editor_id = %d ", $user_ID) : "";
    $cats = $wpdb->get_results("SELECT * FROM " . WATUPRO_QCATS . " {$own_sql} ORDER BY ID");
    if (@file_exists(get_stylesheet_directory() . '/watupro/question_cats.php')) {
        require get_stylesheet_directory() . '/watupro/question_cats.php';
    } else {
        require WATUPRO_PATH . "/views/question_cats.php";
    }
}
Esempio n. 3
0
function watupro_default_grades()
{
    global $wpdb, $user_ID;
    $in_default_grades = true;
    $percentage_based = intval(@$_GET['percentage_based']);
    $exam = (object) array("ID" => 0, "name" => "", "grades_by_percent" => $percentage_based);
    // check access
    $multiuser_access = 'all';
    $userid_sql = '';
    if (watupro_intel()) {
        $multiuser_access = WatuPROIMultiUser::check_access('exams_access');
    }
    // change the common gradecat design
    if (!empty($_POST['save_design']) and $multiuser_access == 'all') {
        update_option('watupro_gradecat_design', $_POST['gradecat_design']);
    }
    // prepare the default gradecat design
    $gradecat_design = get_option('watupro_gradecat_design');
    if (empty($gradecat_design)) {
        $gradecat_design = "<p>" . __('For category <strong>%%CATEGORY%%</strong> you got grade <strong>%%GTITLE%%</strong>.', 'watupro') . "</p>\n\t\t\t<p>%%GDESC%%</p><hr>";
        update_option('watupro_gradecat_design', $gradecat_design);
    }
    // select question categories
    $cats = $wpdb->get_results("SELECT * FROM " . WATUPRO_QCATS . " WHERE name!='' ORDER BY name");
    if (!empty($_POST['add'])) {
        $wpdb->query($wpdb->prepare("INSERT INTO " . WATUPRO_GRADES . " SET\n\t\t\texam_id=0, gtitle=%s, gdescription=%s, gfrom=%s, gto=%s, certificate_id=%d, \n\t\t\tcat_id=%d, editor_id=%d, percentage_based=%d", $_POST['gtitle'], $_POST['gdescription'], $_POST['gfrom'], $_POST['gto'], @$_POST['certificate_id'], $_POST['cat_id'], $user_ID, $percentage_based));
    }
    if (!empty($_POST['del'])) {
        if ($multiuser_access == 'own') {
            $userid_sql = $wpdb->prepare(" AND editor_id=%d ", $user_ID);
        }
        $wpdb->query($wpdb->prepare("DELETE FROM " . WATUPRO_GRADES . " WHERE ID=%d {$userid_sql}", $_POST['id']));
    }
    if (!empty($_POST['save'])) {
        if ($multiuser_access == 'own') {
            $userid_sql = $wpdb->prepare(" AND editor_id=%d ", $user_ID);
        }
        $wpdb->query($wpdb->prepare("UPDATE " . WATUPRO_GRADES . " SET\n\t\t\tgtitle=%s, gdescription=%s, gfrom=%s, gto=%s, certificate_id=%d\n\t\t\tWHERE ID=%d {$userid_sql}", $_POST['gtitle'], $_POST['gdescription' . $_POST['id']], $_POST['gfrom'], $_POST['gto'], @$_POST['certificate_id'], $_POST['id']));
    }
    $cat_id = empty($_POST['cat_id']) ? 0 : $_POST['cat_id'];
    // select all grades of the selected category
    $grades = $wpdb->get_results($wpdb->prepare("SELECT * FROM " . WATUPRO_GRADES . " \n\t\tWHERE exam_id=0 AND cat_id=%d AND percentage_based=%d", $cat_id, $percentage_based));
    // for the moment certificates will be used only on non-category grades
    if (!$cat_id) {
        // select certificates if any
        $certificates = $wpdb->get_results("SELECT * FROM " . WATUPRO_CERTIFICATES . " ORDER BY title");
        $cnt_certificates = sizeof($certificates);
    }
    if (@file_exists(get_stylesheet_directory() . '/watupro/grades.php')) {
        require get_stylesheet_directory() . '/watupro/grades.php';
    } else {
        require WATUPRO_PATH . "/views/grades.php";
    }
}
Esempio n. 4
0
function watupro_user_certificates()
{
    global $wpdb, $user_ID;
    $certificate = $wpdb->get_row($wpdb->prepare("SELECT * FROM " . WATUPRO_CERTIFICATES . " WHERE ID=%d", $_GET['id']));
    // check access
    $multiuser_access = 'all';
    if (watupro_intel()) {
        $multiuser_access = WatuPROIMultiUser::check_access('certificates_access');
    }
    if ($multiuser_access == 'own') {
        if ($certificate->editor_id != $user_ID) {
            wp_die(__('You can manage only your own certificates', 'watupro'));
        }
    }
    if (!empty($_GET['approve'])) {
        $wpdb->query($wpdb->prepare("UPDATE " . WATUPRO_USER_CERTIFICATES . " SET pending_approval = 0 WHERE ID=%d", $_GET['user_certificate_id']));
        // send email to user?
        if ($certificate->approval_notify_user) {
            WatuPROCertificate::approval_notify($certificate, $_GET['user_certificate_id']);
        }
        watupro_redirect("admin.php?page=watupro_user_certificates&id=" . $_GET['id']);
    }
    if (!empty($_GET['delete'])) {
        $wpdb->query($wpdb->prepare("DELETE FROM " . WATUPRO_USER_CERTIFICATES . " WHERE ID=%d", $_GET['user_certificate_id']));
    }
    // select users
    $users = $wpdb->get_results($wpdb->prepare("SELECT tUC.ID as user_certificate_id, tU.user_nicename as user_nicename, tU.user_email as user_email, \n\ttE.name as exam_name, tUC.pending_approval as pending_approval, tT.ID as taking_id, tT.date as taking_date, tT.result as taking_result,\n\ttE.ID as exam_id\n\tFROM " . WATUPRO_USER_CERTIFICATES . " tUC \n\tJOIN {$wpdb->users} tU ON tUC.user_id = tU.ID  \n\tJOIN " . WATUPRO_TAKEN_EXAMS . " tT ON tT.user_id = tU.ID AND tT.ID = tUC.taking_id\n\tJOIN " . WATUPRO_EXAMS . " tE ON tE.ID = tT.exam_id AND tE.ID = tUC.exam_id\n\tWHERE tUC.certificate_id=%d\n\tORDER BY tT.ID DESC", $certificate->ID));
    $dateformat = get_option('date_format');
    $is_admin = true;
    wp_enqueue_script('thickbox', null, array('jquery'));
    wp_enqueue_style('thickbox.css', '/' . WPINC . '/js/thickbox/thickbox.css', null, '1.0');
    if (@file_exists(get_stylesheet_directory() . '/watupro/users-earned-certificate.html.php')) {
        require get_stylesheet_directory() . '/watupro/users-earned-certificate.html.php';
    } else {
        require WATUPRO_PATH . "/views/users-earned-certificate.html.php";
    }
}
Esempio n. 5
0
function watupro_add_menu_links()
{
    global $wp_version, $_registered_pages;
    $page = 'tools.php';
    $student_caps = current_user_can(WATUPRO_MANAGE_CAPS) ? WATUPRO_MANAGE_CAPS : 'read';
    // used to be watupro_exams
    // multiuser settings - let's first default all to WATUPRO_MANAGE_CAPS in case of no Intelligence module
    $exam_caps = $certificate_caps = $cat_caps = $ugroup_caps = $qcat_caps = $setting_caps = WATUPRO_MANAGE_CAPS;
    if (watupro_intel() and !current_user_can('administrator')) {
        if (!WatuPROIMultiUser::check_access('exams_access', true)) {
            $exam_caps = 'administrator';
        }
        if (!WatuPROIMultiUser::check_access('certificates_access', true)) {
            $certificate_caps = 'administrator';
        }
        if (!WatuPROIMultiUser::check_access('cats_access', true)) {
            $cat_caps = 'administrator';
        }
        if (!WatuPROIMultiUser::check_access('usergroups_access', true)) {
            $ugroup_caps = 'administrator';
        }
        if (!WatuPROIMultiUser::check_access('qcats_access', true)) {
            $qcat_caps = 'administrator';
        }
        if (!WatuPROIMultiUser::check_access('settings_access', true)) {
            $setting_caps = 'administrator';
        }
    }
    // students part
    if (!get_option('watupro_nodisplay_myquizzes')) {
        add_menu_page(sprintf(__('My %s', 'watupro'), __('Quizzes', 'watupro')), sprintf(__('My %s', 'watupro'), __('Quizzes', 'watupro')), $student_caps, "my_watupro_exams", 'watupro_my_exams');
    } else {
        add_submenu_page(null, sprintf(__('My %s', 'watupro'), __('Quizzes', 'watupro')), sprintf(__('My %s', 'watupro'), __('Quizzes', 'watupro')), $exam_caps, "my_watupro_exams", 'watupro_my_exams');
    }
    if (!get_option('watupro_nodisplay_mycertificates')) {
        add_submenu_page('my_watupro_exams', __("My Certificates", 'watupro'), __("My Certificates", 'watupro'), $student_caps, 'watupro_my_certificates', 'watupro_my_certificates');
    } else {
        add_submenu_page(null, __("My Certificates", 'watupro'), __("My Certificates", 'watupro'), $exam_caps, 'watupro_my_certificates', 'watupro_my_certificates');
    }
    do_action('watupro_user_menu');
    if (!get_option('watupro_nodisplay_mysettings')) {
        add_submenu_page('my_watupro_exams', sprintf(__("%s Settings", 'watupro'), __('Quiz', 'watupro')), sprintf(__("%s Settings", 'watupro'), __('Quiz', 'watupro')), $student_caps, 'watupro_my_options', 'watupro_my_options');
    }
    // admin menus
    // "watupro_exams" menu is always accessible to WATUPRO_MANAGE_CAPS because it's the main menu item
    add_menu_page(__('Watu PRO', 'watupro'), __('Watu PRO', 'watupro'), WATUPRO_MANAGE_CAPS, "watupro_exams", 'watupro_exams');
    add_submenu_page('watupro_exams', __('Quizzes', 'watupro'), __('Quizzes', 'watupro'), WATUPRO_MANAGE_CAPS, "watupro_exams", 'watupro_exams');
    add_submenu_page('watupro_exams', __("Watu PRO Certificates", 'watupro'), __("Certificates", 'watupro'), $certificate_caps, 'watupro_certificates', 'watupro_certificates');
    add_submenu_page('watupro_exams', __('Quiz Categories', 'watupro'), __('Quiz Categories', 'watupro'), $cat_caps, "watupro_cats", "watupro_cats");
    add_submenu_page('watupro_exams', __('User Groups', 'watupro'), __('User Groups', 'watupro'), $ugroup_caps, "watupro_groups", "watupro_groups");
    add_submenu_page('watupro_exams', __('Question Categories', 'watupro'), __('Question Categories', 'watupro'), $qcat_caps, "watupro_question_cats", "watupro_question_cats");
    add_submenu_page('watupro_exams', __('Default Grades', 'watupro'), __('Default Grades', 'watupro'), $exam_caps, "watupro_default_grades", "watupro_default_grades");
    // accessible only to superadmin
    add_submenu_page('watupro_exams', __('Modules', 'watupro'), __('Modules', 'watupro'), 'manage_options', "watupro_modules", "watupro_modules");
    add_submenu_page('watupro_exams', __('Settings', 'watupro'), __('Settings', 'watupro'), $setting_caps, "watupro_options", "watupro_options");
    do_action('watupro_admin_menu');
    // always accessible to WATUPRO_MANAGE_CAPS
    add_submenu_page('watupro_exams', __('Help', 'watupro'), __('Help', 'watupro'), WATUPRO_MANAGE_CAPS, "watupro_help", "watupro_help");
    // not visible in menu - add/edit exam
    add_submenu_page(NULL, __('Add/Edit Exam', 'watupro'), __('Add/Edit Exam', 'watupro'), $exam_caps, "watupro_exam", "watupro_exam");
    add_submenu_page(NULL, __('Add/Edit Question', 'watupro'), __('Add/Edit Question', 'watupro'), $exam_caps, "watupro_question", "watupro_question");
    // add/edit question
    add_submenu_page(NULL, __('Manage Questions', 'watupro'), __('Manage Questions', 'watupro'), $exam_caps, "watupro_questions", "watupro_questions");
    // manage questions
    add_submenu_page(NULL, __('Taken Exam Data', 'watupro'), __('Taken Exam Data', 'watupro'), $exam_caps, "watupro_takings", "watupro_takings");
    // view takings
    add_submenu_page(NULL, __('Manage Grades', 'watupro'), __('Manage Grades', 'watupro'), $exam_caps, "watupro_grades", "watupro_grades");
    // manage grades
    add_submenu_page(NULL, __('Copy Exam', 'watupro'), __('Copy Exam', 'watupro'), $exam_caps, "watupro_copy_exam", "watupro_copy_exam");
    // copy exam
    add_submenu_page(NULL, __('Users Who Earned Certificate', 'watupro'), __('Users Who Earned Certificate', 'watupro'), $certificate_caps, "watupro_user_certificates", "watupro_user_certificates");
    // view/approve user certificates
    add_submenu_page(NULL, __('Editing an answer to question', 'watupro'), __('Editing an answer to question', 'watupro'), $exam_caps, "watupro_edit_choice", "watupro_edit_choice");
    add_submenu_page(NULL, __('Advanced questions import', 'watupro'), __('Advanced questions import', 'watupro'), $exam_caps, "watupro_advanced_import", array('WatuPROImport', 'dispatch'));
}
Esempio n. 6
0
function watupro_copy_exam()
{
    global $wpdb, $user_ID;
    $multiuser_access = 'all';
    if (watupro_intel()) {
        $multiuser_access = WatuPROIMultiUser::check_access('exams_access');
    }
    $own_sql = $multiuser_access == 'own' ? $wpdb->prepare(" AND editor_id=%d ", $user_ID) : "";
    $exam = $wpdb->get_row($wpdb->prepare("SELECT * FROM " . WATUPRO_EXAMS . " WHERE ID=%d", $_GET['id']));
    $grades = $wpdb->get_results($wpdb->prepare("SELECT * FROM " . WATUPRO_GRADES . " WHERE  exam_id=%d order by ID ", $exam->ID));
    $questions = $wpdb->get_results($wpdb->prepare("SELECT cat_id, question, ID FROM " . WATUPRO_QUESTIONS . " WHERE exam_id=%d ORDER BY sort_order, ID", $exam->ID));
    $cids = array(0);
    foreach ($questions as $question) {
        if (!in_array($question->cat_id, $cids)) {
            $cids[] = $question->cat_id;
        }
    }
    $cidsql = implode(", ", $cids);
    // select question categories to group questions by cats
    $qcats = $wpdb->get_results("SELECT * FROM " . WATUPRO_QCATS . " WHERE ID IN ({$cidsql}) ORDER BY name");
    // add Uncategorized
    $qcats[] = (object) array("ID" => 0, "name" => __('Uncategorized', 'watupro'));
    $other_exams = $wpdb->get_results("SELECT * FROM " . WATUPRO_EXAMS . " WHERE ID!='" . $exam->ID . "' {$own_sql} ORDER BY name");
    if (!empty($_POST['copy_exam'])) {
        try {
            $copy_to = $_POST['copy_option'] == 'new' ? 0 : $_POST['copy_to'];
            WTPExam::copy($exam->ID, $copy_to);
            $_SESSION['flash'] = __("The exam was successfully copied!", 'watupro');
            watupro_redirect("admin.php?page=watupro_exams");
        } catch (Exception $e) {
            $error = $e->getMessage();
        }
    }
    if (@file_exists(get_stylesheet_directory() . '/watupro/copy-exam-form.html.php')) {
        require get_stylesheet_directory() . '/watupro/copy-exam-form.html.php';
    } else {
        require WATUPRO_PATH . "/views/copy-exam-form.html.php";
    }
}
Esempio n. 7
0
function watupro_cats()
{
    global $wpdb, $wp_roles, $user_ID;
    $groups_table = WATUPRO_GROUPS;
    $multiuser_access = 'all';
    if (watupro_intel()) {
        $multiuser_access = WatuPROIMultiUser::check_access('cats_access');
    }
    // are we using WP Roles or Watupro groups
    $use_wp_roles = get_option('watupro_use_wp_roles');
    // select all groups
    if (!$use_wp_roles) {
        $groups = $wpdb->get_results("SELECT * FROM " . WATUPRO_GROUPS . " ORDER BY name");
    } else {
        $roles = $wp_roles->roles;
    }
    switch (@$_GET['do']) {
        case 'add':
            if (!empty($_POST['ok'])) {
                $wpdb->query($wpdb->prepare("INSERT INTO " . WATUPRO_CATS . " (name, ugroups, editor_id)\n\t\t\t\t\tVALUES (%s, %s, %d)", $_POST['name'], "|" . @implode("|", $_POST['ugroups']) . "|", $user_ID));
                echo "<meta http-equiv='refresh' content='0;url=admin.php?page=watupro_cats' />";
                exit;
            }
            if (@file_exists(get_stylesheet_directory() . '/watupro/cat.php')) {
                require get_stylesheet_directory() . '/watupro/cat.php';
            } else {
                require WATUPRO_PATH . "/views/cat.php";
            }
            break;
        case 'edit':
            if ($multiuser_access == 'own') {
                $cat = $wpdb->get_row($wpdb->prepare("SELECT * FROM " . WATUPRO_CATS . " WHERE ID=%d", $_GET['id']));
                if ($cat->editor_id != $user_ID) {
                    wp_die(__('You can manage only your own categories', 'watupro'));
                }
            }
            if (!empty($_POST['del'])) {
                $wpdb->query($wpdb->prepare("DELETE FROM " . WATUPRO_CATS . " WHERE ID=%d", $_GET['id']));
                // set cat_id=0 to all exams that were in this cat
                $wpdb->query($wpdb->prepare("UPDATE " . WATUPRO_EXAMS . " SET cat_id=0 WHERE cat_id=%d", $_GET['id']));
                echo "<meta http-equiv='refresh' content='0;url=admin.php?page=watupro_cats' />";
                exit;
            }
            if (!empty($_POST['ok'])) {
                $wpdb->query($wpdb->prepare("UPDATE " . WATUPRO_CATS . " SET\n\t\t\t\t\tname=%s, ugroups=%s WHERE ID=%d", $_POST['name'], "|" . @implode("|", $_POST['ugroups']) . "|", $_GET['id']));
                echo "<meta http-equiv='refresh' content='0;url=admin.php?page=watupro_cats' />";
                exit;
            }
            $cat = $wpdb->get_row($wpdb->prepare("SELECT * FROM " . WATUPRO_CATS . " WHERE ID=%d", $_GET['id']));
            if (@file_exists(get_stylesheet_directory() . '/watupro/cat.php')) {
                require get_stylesheet_directory() . '/watupro/cat.php';
            } else {
                require WATUPRO_PATH . "/views/cat.php";
            }
            break;
        default:
            // select my cats
            $own_sql = $multiuser_access == 'own' ? $wpdb->prepare(" WHERE editor_id = %d ", $user_ID) : "";
            $cats = $wpdb->get_results("SELECT * FROM " . WATUPRO_CATS . " {$own_sql} ORDER BY name");
            if (@file_exists(get_stylesheet_directory() . '/watupro/cats.php')) {
                require get_stylesheet_directory() . '/watupro/cats.php';
            } else {
                require WATUPRO_PATH . "/views/cats.php";
            }
            break;
    }
}
Esempio n. 8
0
function watupro_takings()
{
    global $wpdb, $wp_roles, $user_ID;
    $roles = $wp_roles->roles;
    $multiuser_access = 'all';
    if (watupro_intel()) {
        $multiuser_access = WatuPROIMultiUser::check_access('exams_access');
    }
    // select user groups
    $groups = $wpdb->get_results("SELECT * FROM " . WATUPRO_GROUPS . " ORDER BY name");
    // shows data for a taken exam
    $ob = empty($_GET['ob']) ? "id" : $_GET['ob'];
    $dir = !empty($_GET['dir']) ? $_GET['dir'] : "DESC";
    $odir = $dir == 'ASC' ? 'DESC' : 'ASC';
    $offset = empty($_GET['offset']) ? 0 : $_GET['offset'];
    // select exam
    $exam = $wpdb->get_row($wpdb->prepare("SELECT * FROM " . WATUPRO_EXAMS . " WHERE ID=%d", $_GET['exam_id']));
    if (!empty($_POST['cleanup']) or !empty($_POST['blankout'])) {
        if ($multiuser_access == 'own' and $exam->editor_id != $user_ID) {
            wp_die(__('You can manage only the results on exams created by you.', 'watupro'));
        }
        if (!empty($_POST['cleanup'])) {
            // now cleanup
            $wpdb->query($wpdb->prepare("DELETE FROM " . WATUPRO_TAKEN_EXAMS . " WHERE exam_id=%d", $exam->ID));
            $wpdb->query($wpdb->prepare("DELETE FROM " . WATUPRO_STUDENT_ANSWERS . " WHERE exam_id=%d", $exam->ID));
        }
        if (!empty($_POST['blankout'])) {
            $wpdb->query($wpdb->prepare("UPDATE " . WATUPRO_TAKEN_EXAMS . " \n\t\t\t\tSET details='data removed', catgrades='data removed' WHERE exam_id=%d", $exam->ID));
            $wpdb->query($wpdb->prepare("UPDATE " . WATUPRO_STUDENT_ANSWERS . " \n\t\t\t\tSET question_text='data removed', snapshot='data removed' WHERE exam_id=%d", $exam->ID));
        }
    }
    // check access
    if ($multiuser_access == 'own') {
        if ($exam->editor_id != $user_ID) {
            wp_die(__('You can only view results on your own quizzes.', 'watupro'));
        }
    }
    // search/filter
    $filters = array();
    $joins = array();
    $filter_sql = $left_join_sql = $role_join_sql = $group_join_sql = $left_join = "";
    $join_sql = "LEFT JOIN {$wpdb->users} tU ON tU.ID=tT.user_id";
    // add filters and joins
    // display name
    if (!empty($_GET['dn'])) {
        switch ($_GET['dnf']) {
            case 'contains':
                $like = "%{$_GET['dn']}%";
                break;
            case 'starts':
                $like = "{$_GET['dn']}%";
                break;
            case 'ends':
                $like = "%{$_GET['dn']}";
                break;
            case 'equals':
            default:
                $like = $_GET['dn'];
                break;
        }
        $joins[] = $wpdb->prepare(" display_name LIKE %s ", $like);
    }
    // email
    if (!empty($_GET['email'])) {
        switch ($_GET['emailf']) {
            case 'contains':
                $like = "%{$_GET['email']}%";
                break;
            case 'starts':
                $like = "{$_GET['email']}%";
                break;
            case 'ends':
                $like = "%{$_GET['email']}";
                break;
            case 'equals':
            default:
                $like = $_GET['email'];
                break;
        }
        $joins[] = $wpdb->prepare(" user_email LIKE %s ", $like);
        $filters[] = $wpdb->prepare(" ((user_id=0 AND email LIKE %s) OR (user_id!=0 AND user_email LIKE %s)) ", $like, $like);
        $left_join = 'LEFT';
        // when email is selected, do left join because it might be without logged user
    }
    // WP user role - when selected role the join always becomes right join
    if (!empty($_GET['role'])) {
        $left_join = '';
        $blog_prefix = $wpdb->get_blog_prefix();
        $role_join_sql = "JOIN {$wpdb->usermeta} tUM ON tUM.user_id = tU.id \n\t\t\tAND tUM.meta_key = '{$blog_prefix}capabilities' AND tUM.meta_value LIKE '%:" . '"' . $_GET['role'] . '"' . ";%'";
    }
    // Watupro user group
    if (!empty($_GET['ugroup'])) {
        $left_join = '';
        $group_join_sql = "JOIN {$wpdb->usermeta} tUM2 ON tUM2.user_id = tU.id \n\t\t\tAND tUM2.meta_key = 'watupro_groups' AND tUM2.meta_value LIKE '%:" . '"' . $_GET['ugroup'] . '"' . ";%'";
    } else {
        $group_join_sql = "LEFT JOIN {$wpdb->usermeta} tUM2 ON tUM2.user_id = tU.id \n\t\t\tAND tUM2.meta_key = 'watupro_groups' ";
    }
    // IP
    if (!empty($_GET['ip'])) {
        switch ($_GET['ipf']) {
            case 'contains':
                $like = "%{$_GET['ip']}%";
                break;
            case 'starts':
                $like = "{$_GET['ip']}%";
                break;
            case 'ends':
                $like = "%{$_GET['ip']}";
                break;
            case 'equals':
            default:
                $like = $_GET['ip'];
                break;
        }
        $filters[] = $wpdb->prepare(" ip LIKE %s ", $like);
    }
    // Date
    if (!empty($_GET['date'])) {
        switch ($_GET['datef']) {
            case 'after':
                $filters[] = $wpdb->prepare(" date>%s ", $_GET['date']);
                break;
            case 'before':
                $filters[] = $wpdb->prepare(" date<%s ", $_GET['date']);
                break;
            case 'equals':
            default:
                $filters[] = $wpdb->prepare(" date=%s ", $_GET['date']);
                break;
        }
    }
    // Points
    if (!empty($_GET['points'])) {
        switch ($_GET['pointsf']) {
            case 'less':
                $filters[] = $wpdb->prepare(" points<%d ", $_GET['points']);
                break;
            case 'more':
                $filters[] = $wpdb->prepare(" points>%d ", $_GET['points']);
                break;
            case 'equals':
            default:
                $filters[] = $wpdb->prepare(" points=%d ", $_GET['points']);
                break;
        }
    }
    // % correct
    if (!empty($_GET['percent_correct'])) {
        switch ($_GET['percentf']) {
            case 'less':
                $filters[] = $wpdb->prepare(" percent_correct < %d ", $_GET['percent_correct']);
                break;
            case 'more':
                $filters[] = $wpdb->prepare(" percent_correct > %d ", $_GET['percent_correct']);
                break;
            case 'equals':
            default:
                $filters[] = $wpdb->prepare(" percent_correct = %d ", $_GET['percent_correct']);
                break;
        }
    }
    // passed taking ID from the manage user-certificates page
    if (!empty($_GET['taking_id'])) {
        $filters[] = $wpdb->prepare(" tT.ID=%d ", $_GET['taking_id']);
    }
    // Grade
    if (!empty($_GET['grade'])) {
        $filters[] = $wpdb->prepare(" grade_id=%d ", $_GET['grade']);
    }
    // construct filter & join SQLs
    if (sizeof($filters)) {
        $filter_sql = " AND " . implode(" AND ", $filters);
    }
    if (sizeof($joins)) {
        $join_sql = " {$left_join} JOIN {$wpdb->users} tU ON tU.ID=tT.user_id AND " . implode(" AND ", $joins);
    }
    $limit_sql = "LIMIT {$offset},10";
    if (!empty($_GET['export'])) {
        $limit_sql = "";
    }
    // select takings
    $in_progress = empty($_GET['in_progress']) ? 0 : 1;
    // completed or "in progress" takings
    $q = "SELECT SQL_CALC_FOUND_ROWS tT.*, tU.display_name as display_name, tU.user_email as user_email,\n\ttUM2.meta_value as user_groups\n\tFROM " . WATUPRO_TAKEN_EXAMS . " tT \n\t{$join_sql} {$role_join_sql} {$group_join_sql}\n\tWHERE tT.exam_id={$exam->ID} AND tT.in_progress={$in_progress} {$filter_sql}\n\tORDER BY {$ob} {$dir} {$limit_sql}";
    // echo $q;
    $takings = $wpdb->get_results($q);
    $count = $wpdb->get_var("SELECT FOUND_ROWS()");
    // fill user groups
    foreach ($takings as $cnt => $taking) {
        if (empty($taking->user_groups)) {
            continue;
        }
        $ugroups = unserialize($taking->user_groups);
        $ugroup_names = array();
        foreach ($groups as $group) {
            if (in_array($group->ID, $ugroups)) {
                $ugroup_names[] = $group->name;
            }
        }
        $takings[$cnt]->user_groups = implode(', ', $ugroup_names);
    }
    // end filling user groups info
    // select number of in_progress takings unless we are showing them now
    if (!$in_progress) {
        $num_unfinished = $wpdb->get_var($wpdb->prepare("SELECT COUNT(ID) FROM " . WATUPRO_TAKEN_EXAMS . "\n\t\t\tWHERE exam_id = %d AND in_progress=1", $exam->ID));
    }
    if (!empty($_GET['export'])) {
        $_record = new WTPRecord();
        $_record->export($takings, $exam);
    }
    // grades for the dropdown
    $grades = WTPGrade::get_grades($exam);
    // this var will be added to links at the view
    $filters_url = "dn=" . @$_GET['dn'] . "&dnf=" . @$_GET['dnf'] . "&email=" . @$_GET['email'] . "&emailf=" . @$_GET['emailf'] . "&ip=" . @$_GET['ip'] . "&ipf=" . @$_GET['ipf'] . "&date=" . @$_GET['date'] . "&datef=" . @$_GET['datef'] . "&points=" . @$_GET['points'] . "&pointsf=" . @$_GET['pointsf'] . "&grade=" . @$_GET['grade'] . "&role=" . @$_GET['role'] . "&ugroup=" . @$_GET['ugroup'] . "&percent_correct=" . @$_GET['percent_correct'] . "&percentf=" . @$_GET['percentf'];
    $display_filters = (!sizeof($filters) and !sizeof($joins) and empty($role_join_sql) and empty($_GET['ugroup'])) ? false : true;
    wp_enqueue_script('thickbox', null, array('jquery'));
    wp_enqueue_style('thickbox.css', '/' . WPINC . '/js/thickbox/thickbox.css', null, '1.0');
    if (@file_exists(get_stylesheet_directory() . '/watupro/takings.php')) {
        require get_stylesheet_directory() . '/watupro/takings.php';
    } else {
        require WATUPRO_PATH . "/views/takings.php";
    }
}