<?php
    require_once(dirname(dirname(dirname(dirname(__FILE__))))."/engine/engine.php");
    
    $testfolder = get_input('id', false);
    $next = get_input('Next', false);
    $previous = get_input('Previous', false);
    $home = get_input('Home', false);
    $end = get_input('End', false);
    $maxpage = get_input('max', 0) - 1;
    $test_shooter_id = get_input('test_shooter_id', false);

    if ($testfolder && $home) {
        $_SESSION['test_preview'][$testfolder] = 0;
    } else if ($testfolder && $end) {
        $_SESSION['test_preview'][$testfolder] = $maxpage;
    } else if ($testfolder && $next) {
        if (
            isset($_SESSION['test_preview']) &&
            isset($_SESSION['test_preview'][$testfolder]) &&
            is_numeric($_SESSION['test_preview'][$testfolder]) &&
            $_SESSION['test_preview'][$testfolder] <= ($maxpage - 1)
        ) {
            $_SESSION['test_preview'][$testfolder]++;
        } else {
            $_SESSION['test_preview'][$testfolder] = 1;
        }
    } else if ($testfolder && $previous) {
        if (
            isset($_SESSION['test_preview']) &&
            isset($_SESSION['test_preview'][$testfolder]) &&
            is_numeric($_SESSION['test_preview'][$testfolder]) &&
            $_SESSION['test_preview'][$testfolder] > 0
        ) {
            $_SESSION['test_preview'][$testfolder]--;
        } else {
            $_SESSION['test_preview'][$testfolder] = 0;
        }
    } else {
	    $TeKe->add_system_message(_("Action failed"), 'error');
    }
    $params = "";
    if ($test_shooter_id) {
        $params = "?test_shooter_id=".$test_shooter_id;
    }
    forward(WWW_ROOT."tests/TestFolder/".$testfolder."/preview".$params);
?>