<?php
/****************************************************************/
/* ATutor                                                       */
/****************************************************************/
/* Copyright (c) 2002-2010                                      */
/* Inclusive Design Institute                                   */
/* http://atutor.ca                                             */
/*                                                              */
/* This program is free software. You can redistribute it and/or*/
/* modify it under the terms of the GNU General Public License  */
/* as published by the Free Software Foundation.                */
/****************************************************************/
// $Id$

/*
 * This script accept these _GET variables:
 * tid: test id
 * cid: this test is the pre-requisite of the content id cid.
 *      It's embedded as hidden value and passed into take_test pages.
 * in_cid: this test is the post test of the content id cid.
 *     Also embedded as hidden value and passed into take_test pages.
 * Only one of cid or in_cid should be presented.
 * If cid or in_cid is presented, the script flow is,
 * If the user passes the pre-requisite test, the page is re-directed 
 * back to the content page of cid. Otherwise, re-take the test.
 */

define('AT_INCLUDE_PATH', '../../../include/');
require(AT_INCLUDE_PATH.'vitals.inc.php');
require(AT_INCLUDE_PATH.'../mods/_standard/tests/lib/test_result_functions.inc.php');

// test authentication
if (isset($_GET['tid']))
    $tid = intval($_GET['tid']);
else if (isset($_POST['tid']))
    $tid = intval($_POST['tid']);

if (isset($_REQUEST['cid']))
{
    $cid = intval($_REQUEST['cid']);
    $msg->addInfo('PRETEST');
}

// this test is the post test of content in_cid
if (isset($_REQUEST['in_cid']))
{
    $in_cid = intval($_REQUEST['in_cid']);
    
    // Check if the content has pre-requisite tests that the member has not passed.
    // If there is, 
    // 1. Instructors: see the message that a pretest is associated with this content and proceed to display the post test
    // 2. Students: re-direct to pre-test, when pass the pre-test, direct to parent content page. The students must go thru
    //              the content to get to the post test. 
    if ($in_cid > 0) {
        $pretest = $contentManager->getPretest($in_cid);

        if ($pretest > 0) {
            if (authenticate(AT_PRIV_CONTENT, AT_PRIV_RETURN)) {
                $msg->addInfo('PRETEST');
            }
            else {
                header('Location: '.url_rewrite('mods/_standard/tests/test_intro.php?tid='.$pretest.SEP.'cid='.$in_cid, AT_PRETTY_URL_IS_HEADER));
                exit;
            }
        } else if ($pretest == -1) { // pretest exists but cannot access because the pretest has expired.
            require(AT_INCLUDE_PATH.'header.inc.php');
            $msg->printAll();
            require(AT_INCLUDE_PATH.'footer.inc.php');
            exit;
        }
    }
}

// make sure max attempts not reached, and still on going
$sql        = "SELECT *, UNIX_TIMESTAMP(start_date) AS start_date2, UNIX_TIMESTAMP(end_date) AS end_date2 FROM ".TABLE_PREFIX."tests WHERE test_id=".$tid." AND course_id=".$_SESSION['course_id'];
$result = mysql_query($sql, $db);
$test_row = mysql_fetch_assoc($result);
/* check to make sure we can access this test: */
if (!$test_row['guests'] && ($_SESSION['enroll'] == AT_ENROLL_NO || $_SESSION['enroll'] == AT_ENROLL_ALUMNUS)) {
    require(AT_INCLUDE_PATH.'header.inc.php');
    $msg->printInfos('NOT_ENROLLED');
    require(AT_INCLUDE_PATH.'footer.inc.php');
    exit;
}
if (!$test_row['guests'] && !authenticate_test($tid)) {
    header('Location: my_tests.php');
    exit;
}

// checks one/all questions per page, and forward user to the correct one
if (isset($_POST['cancel'])) 
{
    if (isset($cid))
    {
        require(AT_INCLUDE_PATH.'header.inc.php');
        $msg->printInfos(array('PRETEST_FAILED', $test_row['title']));
        require(AT_INCLUDE_PATH.'footer.inc.php');
        exit;
    }
    //Retrieve last visited page
    if (isset($_SESSION['last_visited_page'])){
        $_last_visited_page = $_SESSION['last_visited_page'];
        unset($_SESSION['last_visited_page']);
    } else {
        $_last_visited_page = url_rewrite('mods/_standard/tests/my_tests.php', AT_PRETTY_URL_IS_HEADER);
    }

    $msg->addFeedback('CANCELLED');    
    header('Location: '.$_last_visited_page);
    exit;
} 
else if (isset($_POST['submit'])) 
{
    $guest_name = $addslashes(trim($_POST["guest_name"]));
    $organization = $addslashes(trim($_POST["organization"]));
    $location = $addslashes(trim($_POST["location"]));
    $role = $addslashes(trim($_POST["role"]));
    $focus = $addslashes(trim($_POST["focus"]));
    
    if ($guest_name <> "" || $organization <> "" || $location <> "" || $role <> "" || $focus <> "")
    {
        $guest_id = get_next_guest_id();

        $sql    = "INSERT INTO ".TABLE_PREFIX."guests (guest_id, name, organization, location, role, focus)
                         VALUES ('$guest_id', '$guest_name', '$organization', '$location', '$role', '$focus')";
        $result = mysql_query($sql, $db);
        $result_id = mysql_insert_id($db);
    }
    $gid_str = (isset($guest_id)) ? SEP."gid=".$guest_id : "";
    if (isset($cid)) $gid_str .= SEP.'cid='.$cid;

    if ($test_row['display']) {
        header('Location: '.url_rewrite('mods/_standard/tests/take_test_q.php?tid='.$tid.$gid_str, AT_PRETTY_URL_IS_HEADER));
    } else {
        header('Location: '.url_rewrite('mods/_standard/tests/take_test.php?tid='.$tid.$gid_str, AT_PRETTY_URL_IS_HEADER));
    }
    exit;
}

/* 
 * If max attempted reached, then stop it.
 * @3300
 */
$sql = "SELECT COUNT(*) AS cnt FROM ".TABLE_PREFIX."tests_results WHERE status=1 AND test_id=".$tid." AND member_id='".$_SESSION['member_id']."'";
$takes_result = mysql_query($sql, $db);
$takes = mysql_fetch_assoc($takes_result);
if ( (($test_row['start_date2'] > time()) || ($test_row['end_date2'] < time())) || 
   ( ($test_row['num_takes'] != AT_TESTS_TAKE_UNLIMITED) && ($takes['cnt'] >= $test_row['num_takes']) )  ) {
    require(AT_INCLUDE_PATH.'header.inc.php');
    $msg->printInfos('MAX_ATTEMPTS');
    
    require(AT_INCLUDE_PATH.'footer.inc.php');
    exit;
}

require(AT_INCLUDE_PATH.'header.inc.php');

// get number of attempts
$sql    = "SELECT COUNT(test_id) AS cnt FROM ".TABLE_PREFIX."tests_results WHERE status=1 AND test_id=$tid AND member_id='".$_SESSION['member_id']."'";
$result = mysql_query($sql, $db);
if ($row = mysql_fetch_assoc($result)) {
    $num_takes = $row['cnt'];
} else {
    $num_takes = 0;
}

$sql    = "SELECT COUNT(*) AS num_questions FROM ".TABLE_PREFIX."tests_questions_assoc WHERE test_id=$tid";
$result = mysql_query($sql, $db);
$row = mysql_fetch_assoc($result);
if (!$test_row['random'] || $test_row['num_questions'] > $row['num_questions']) {
    $test_row['num_questions'] = $row['num_questions'];
}

// Add header to notify users that Remedial Content is available
$remedial_content = render_remedial_content($_SESSION['member_id'], $tid);
if ($remedial_content && count($remedial_content) > 0) {
    $msg->addInfo(array('REMEDIAL_CONTENT_AVAILABLE', sprintf('<a href="#" onclick="ATutor.mods.tests.jumpTo(\'a[name=remedial_content]\'); return false;">%s</a>', _AT('remedial_content_goto_link'))));
    $msg->printInfos();
}
?>

<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post" name="form">
<input type="hidden" name="tid" value="<?php echo $tid; ?>" />
<?php if (isset($cid)) { ?><input type="hidden" name="cid" value="<?php echo $cid; ?>" /> <?php } ?>

<div class="input-form">
    <fieldset class="group_form"><legend class="group_form"><?php echo $test_row['title']; ?></legend><div class="row">

<?php if ($test_row['guests'] && $test_row['show_guest_form'] && !$_SESSION['member_id']): ?>
    <fieldset class="group_form"><legend class="group_form"><?php echo _AT("test_description"); ?></legend><div class="row">
<?php endif; ?>
    <table>
<?php if ($test_row['description']<>""): ?>
        <tr>
            <td><?php echo _AT('test_description'); ?></td>
            <td><?php echo empty($test_row['description']) ? '&nbsp;' : $test_row['description']; ?></td>
        </tr>
<?php endif; ?>

        <tr>
            <td><?php echo _AT('questions'); ?></td>
            <td><?php echo $test_row['num_questions']; ?></td>
        </tr>

        <tr>
            <td><?php echo _AT('out_of'); ?></td>
            <td><?php echo $test_row['out_of']; ?></td>
        </tr>
    
        <tr>
            <td><?php echo _AT('attempts'); ?></td>
            <td><?php echo $num_takes; ?> / <?php echo ($test_row['num_takes'] == AT_TESTS_TAKE_UNLIMITED) ? _AT('unlimited') : $test_row['num_takes']; ?></td>
        </tr>
            
        <tr>
            <td><?php echo _AT('start_date'); ?></td>
            <td><?php echo AT_date(    _AT('startend_date_long_format'), $test_row['start_date'], AT_DATE_MYSQL_DATETIME); ?></td>
        </tr>

        <tr>
            <td><?php echo _AT('end_date'); ?></td>
            <td><?php echo AT_date(    _AT('startend_date_long_format'), $test_row['end_date'], AT_DATE_MYSQL_DATETIME); ?></td>
        </tr>

        <tr>
            <td><?php echo _AT('anonymous'); ?></td>
            <td><?php echo $test_row['anonymous'] ? _AT('yes') : _AT('no'); ?></td>
        </tr>

        <tr>
            <td><?php echo _AT('display'); ?></td>
            <td><?php echo $test_row['display'] ? _AT('one_question_per_page') : _AT('all_questions_on_page'); ?></td>
        </tr>

        <tr>
            <td><?php echo _AT('instructions'); ?></td>
            <td><?php echo nl2br($test_row['instructions']); ?></td>
        </tr>
        </table>
<?php if ($test_row['guests'] && !$_SESSION['member_id']): ?>
    </fieldset>
<?php endif; ?>

<?php if (($test_row['guests']) && $test_row['show_guest_form'] && !$_SESSION['member_id']): ?>
    <fieldset class="group_form"><legend class="group_form"><?php echo _AT("guest_information").' ('._AT('optional').')'; ?></legend><div class="row">

    <table class="none" width="100%">
    <tr>
        <td width="20%"><label for="guest_name" style="float:right;"><?php echo _AT('guest_name'); ?></label></td>
        <td width="80%"><input id="guest_name" name="guest_name" size="50" type="text" value="<?php echo stripslashes(htmlspecialchars($_POST['guest_name'])); ?>"/></td>
    </tr>

    <tr>
        <td><label for="organization" style="float:right;"><?php echo _AT('organization'); ?></label></td>
        <td><input id="organization" name="organization" size="50" type="text" value="<?php echo stripslashes(htmlspecialchars($_POST['organization'])); ?>" /></td>
    </tr>

    <tr>
        <td><label for="location" style="float:right;"><?php echo _AT('location'); ?></label></td>
        <td><input id="location" name="location" size="50" type="text" value="<?php echo stripslashes(htmlspecialchars($_POST['location'])); ?>" /></td>
    </tr>

    <tr>
        <td><label for="role" style="float:right;"><?php echo _AT('role'); ?></label></td>
        <td><input id="role" name="role" size="50" type="text" value="<?php echo stripslashes(htmlspecialchars($_POST['role'])); ?>" /></td>
    </tr>

    <tr>
        <td><label for="focus" style="float:right;"><?php echo _AT('focus'); ?></label></td>
        <td><input id="focus" name="focus"  size="50" type="text" value="<?php echo stripslashes(htmlspecialchars($_POST['focus'])); ?>" /></td>

    </tr>
    </table>

    </fieldset>



<?php endif; ?>
</div>
    
    <div class="row buttons">
        <input type="submit" name="submit" value=" <?php echo _AT('start_test'); ?> " accesskey="s" class="button"/>
        <input type="submit" name="cancel" value=" <?php echo _AT('cancel'); ?> "  class="button" />
    </div>

    </fieldset>
</div>

<?php echo $remedial_content; ?>

</form>

<?php require(AT_INCLUDE_PATH.'footer.inc.php'); ?>