<?php
/**
 *
 * This file is part of HESK - PHP Help Desk Software.
 *
 * (c) Copyright Klemen Stirn. All rights reserved.
 * https://www.hesk.com
 *
 * For the full copyright and license agreement information visit
 * https://www.hesk.com/eula.php
 *
 */

/* Check if this is a valid include */
if (!defined('IN_SCRIPT')) {die('Invalid attempt');} 

/*** FUNCTIONS ***/


function hesk_translate_timezone_list($timezone_list)
{
    global $hesklang;

    $translate_months_short = array(
        'Jan' => $hesklang['ms01'],
        'Feb' => $hesklang['ms02'],
        'Mar' => $hesklang['ms03'],
        'Apr' => $hesklang['ms04'],
        'May' => $hesklang['ms05'],
        'Jun' => $hesklang['ms06'],
        'Jul' => $hesklang['ms07'],
        'Aug' => $hesklang['ms08'],
        'Sep' => $hesklang['ms09'],
        'Oct' => $hesklang['ms10'],
        'Nov' => $hesklang['ms11'],
        'Dec' => $hesklang['ms12']
    );

    return str_replace(array_keys($translate_months_short), array_values($translate_months_short), $timezone_list);
} // END hesk_translate_timezone_list()


function hesk_generate_timezone_list()
{
    static $regions = array(
        DateTimeZone::AFRICA,
        DateTimeZone::AMERICA,
        DateTimeZone::ANTARCTICA,
        DateTimeZone::ASIA,
        DateTimeZone::ATLANTIC,
        DateTimeZone::AUSTRALIA,
        DateTimeZone::EUROPE,
        DateTimeZone::INDIAN,
        DateTimeZone::PACIFIC,
    );

    $timezones = array();
    foreach( $regions as $region )
    {
        $timezones = array_merge( $timezones, DateTimeZone::listIdentifiers( $region ) );
    }

    $timezone_offsets = array();
    foreach( $timezones as $timezone )
    {
        $tz = new DateTimeZone($timezone);
        $timezone_offsets[$timezone] = $tz->getOffset(new DateTime);
    }

    // sort timezone by timezone name
    ksort($timezone_offsets);
    //asort($timezone_offsets); // <-- use this to sort by time offset from UTC instead

    // Add UTC as the first element
    $timezone_offsets = array('UTC' => 0) + $timezone_offsets;

    $timezone_list = array();
    foreach( $timezone_offsets as $timezone => $offset )
    {
        $offset_prefix = $offset < 0 ? '-' : '+';
        $offset_formatted = gmdate( 'H:i', abs($offset) );

        $pretty_offset = "UTC{$offset_prefix}{$offset_formatted}";

        $t = new DateTimeZone($timezone);
        $c = new DateTime(null, $t);
        $current_time = $c->format('d M Y, H:i');

        $timezone_list[$timezone] = "{$timezone} - {$current_time}";
    }

    return $timezone_list;
} // END hesk_generate_timezone_list()


function hesk_testMySQL()
{
	global $hesk_settings, $hesklang, $set, $mysql_error, $mysql_log;

	define('REQUIRE_MYSQL_VERSION','5.0.7');

	// Use MySQLi extension to connect?
	$use_mysqli = function_exists('mysqli_connect') ? true : false;

	// Get variables
	$set['db_host'] = hesk_input( hesk_POST('s_db_host'), $hesklang['err_dbhost']);
	$set['db_name'] = hesk_input( hesk_POST('s_db_name'), $hesklang['err_dbname']);
	$set['db_user'] = hesk_input( hesk_POST('s_db_user'), $hesklang['err_dbuser']);
	$set['db_pass'] = hesk_input( hesk_POST('s_db_pass') );
	$set['db_pfix'] = preg_replace('/[^0-9a-zA-Z_]/', '', hesk_POST('s_db_pfix', 'hesk_') );

	// Allow & in password
    $set['db_pass'] = str_replace('&amp;', '&', $set['db_pass']);

	// MySQL tables used by HESK
	$tables = array(
		$set['db_pfix'].'attachments',
		$set['db_pfix'].'banned_emails',
		$set['db_pfix'].'banned_ips',
		$set['db_pfix'].'categories',
		$set['db_pfix'].'kb_articles',
		$set['db_pfix'].'kb_attachments',
		$set['db_pfix'].'kb_categories',
		$set['db_pfix'].'logins',
		$set['db_pfix'].'mail',
		$set['db_pfix'].'notes',
		$set['db_pfix'].'online',
		$set['db_pfix'].'pipe_loops',
		$set['db_pfix'].'replies',
		$set['db_pfix'].'reply_drafts',
		$set['db_pfix'].'reset_password',
		$set['db_pfix'].'service_messages',
		$set['db_pfix'].'std_replies',
		$set['db_pfix'].'tickets',
		$set['db_pfix'].'ticket_templates',
		$set['db_pfix'].'users',
	);

	$connection_OK = false;
    $mysql_error = '';

	ob_start();

	// Connect to MySQL
	if ($use_mysqli)
	{
		// Do we need a special port? Check and connect to the database
		if ( strpos($set['db_host'], ':') )
		{
			list($set['db_host_no_port'], $set['db_port']) = explode(':', $set['db_host']);
			$set_link = mysqli_connect($set['db_host_no_port'], $set['db_user'], $set['db_pass'], $set['db_name'], intval($set['db_port']) );
		}
		else
		{
			$set_link = mysqli_connect($set['db_host'], $set['db_user'], $set['db_pass'], $set['db_name']);
		}

		if ( ! $set_link)
		{
			ob_end_clean();
			$mysql_error = $hesklang['err_dbconn'];
			$mysql_log = "(".mysqli_connect_errno().") ".mysqli_connect_error();
			return false;
		}

		$res = mysqli_query($set_link, 'SHOW TABLES FROM `'.mysqli_real_escape_string($set_link, $set['db_name']).'`');
		while ($row = mysqli_fetch_row($res))
		{
			foreach($tables as $k => $v)
			{
				if ($v == $row[0])
				{
					unset($tables[$k]);
					break;
				}
			}
		}

		// Get MySQL version
		$mysql_version = mysqli_fetch_assoc( mysqli_query($set_link, 'SELECT VERSION() AS version') );

		// Close connections
		mysqli_close($set_link);
	}
	else
	{
		$set_link = mysql_connect($set['db_host'], $set['db_user'], $set['db_pass']);

		if ( ! $set_link)
		{
			ob_end_clean();
			$mysql_error = $hesklang['err_dbconn'];
			$mysql_log = mysql_error();
			return false;
		}

		// Select database
		if ( ! mysql_select_db($set['db_name'], $set_link) )
		{
			ob_end_clean();
			$mysql_error = $hesklang['err_dbsele'];
			$mysql_log = mysql_error();
			return false;
		}

		$res = mysql_query('SHOW TABLES FROM `'.mysql_real_escape_string($set['db_name']).'`', $set_link);
		while ($row = mysql_fetch_row($res))
		{
			foreach($tables as $k => $v)
			{
				if ($v == $row[0])
				{
					unset($tables[$k]);
					break;
				}
			}
		}

		// Get MySQL version
		$mysql_version = mysql_fetch_assoc( mysql_query('SELECT VERSION() AS version') );

		// Close connections
		mysql_close($set_link);
	}

	// Check MySQL version
	if ( version_compare($mysql_version['version'], REQUIRE_MYSQL_VERSION, '<') )
	{
		ob_end_clean();
		$mysql_error = $hesklang['err_dbversion'] . ' ' . $mysql_version['version'];
		$mysql_log = '';
		return false;
	}

	// Check PHP version for the mysql(i)_set_charset function
	$set['db_vrsn'] = ( version_compare(PHP_VERSION, '5.2.3') >= 0 ) ? 1 : 0;

	// Some tables weren't found, show an error
	if (count($tables) > 0)
	{
    	ob_end_clean();
		$mysql_error = $hesklang['err_dpi2'].'<br /><br />'.implode(',<br />', $tables);
		$mysql_log = '';
		return false;
	}
    else
    {
    	$connection_OK = true;
    }

    ob_end_clean();

    return $connection_OK;
} // END hesk_testMySQL()


function hesk_testPOP3($check_old_settings=false)
{
	global $hesk_settings, $hesklang, $set;

	$set['pop3_host_name']	= hesk_input( hesk_POST('s_pop3_host_name', 'mail.example.com') );
	$set['pop3_host_port']	= intval( hesk_POST('s_pop3_host_port', 110) );
	$set['pop3_tls']		= empty($_POST['s_pop3_tls']) ? 0 : 1;
    $set['pop3_keep']		= empty($_POST['s_pop3_keep']) ? 0 : 1;
	$set['pop3_user']		= hesk_input( hesk_POST('s_pop3_user') );
	$set['pop3_password']	= hesk_input( hesk_POST('s_pop3_password') );

	// Are new settings the same as old? If yes, skip testing connection, assume it works
	if ($check_old_settings)
	{
		$set['tmp_pop3_host_name']	= hesk_input( hesk_POST('tmp_pop3_host_name', 'mail.example.com') );
		$set['tmp_pop3_host_port']	= intval( hesk_POST('tmp_pop3_host_port', 110) );
		$set['tmp_pop3_tls']		= empty($_POST['tmp_pop3_tls']) ? 0 : 1;
		$set['tmp_pop3_keep']		= empty($_POST['tmp_pop3_keep']) ? 0 : 1;
		$set['tmp_pop3_user']		= hesk_input( hesk_POST('tmp_pop3_user') );
		$set['tmp_pop3_password']	= hesk_input( hesk_POST('tmp_pop3_password') );

		if (
			$set['tmp_pop3_host_name'] != 'mail.example.com'      && // Default setting
			$set['tmp_pop3_host_name'] == $set['pop3_host_name'] &&
			$set['tmp_pop3_host_port'] == $set['pop3_host_port'] &&
			$set['tmp_pop3_tls']       == $set['pop3_tls']       &&
			$set['tmp_pop3_keep']      == $set['pop3_keep']      &&
			$set['tmp_pop3_user']      == $set['pop3_user']      &&
			$set['tmp_pop3_password']  == $set['pop3_password']
		)
		{
			return true;
		}
	}

	// Initiate POP3 class and set parameters
	require_once(HESK_PATH . 'inc/mail/pop3.php');
	$pop3 = new pop3_class;
	$pop3->hostname	= $set['pop3_host_name'];
	$pop3->port		= $set['pop3_host_port'];
	$pop3->tls		= $set['pop3_tls'];
	$pop3->debug	= 1;

	$connection_OK = false;

	ob_start();

	// Connect to POP3
	if(($error=$pop3->Open())=="")
	{
		// Authenticate
		if(($error=$pop3->Login($set['pop3_user'], hesk_htmlspecialchars_decode(stripslashes($set['pop3_password']))))=="")
		{
			if(($error=$pop3->Close()) == "")
			{
				// Connection OK
				$connection_OK = true;
			}
		}
	}

	if($error != '')
	{
    	global $pop3_error, $pop3_log;
        $pop3_error = $error;
		$pop3_log   = ob_get_contents();
	}

	ob_end_clean();

    return $connection_OK;
} // END hesk_testPOP3()


function hesk_testSMTP($check_old_settings=false)
{
	global $hesk_settings, $hesklang, $set;

	// Get variables
	$set['smtp_host_name']	= hesk_input( hesk_POST('s_smtp_host_name', 'localhost') );
	$set['smtp_host_port']	= intval( hesk_POST('s_smtp_host_port', 25) );
	$set['smtp_timeout']	= intval( hesk_POST('s_smtp_timeout', 10) );
	$set['smtp_ssl']		= empty($_POST['s_smtp_ssl']) ? 0 : 1;
	$set['smtp_tls']		= empty($_POST['s_smtp_tls']) ? 0 : 1;
	$set['smtp_user']		= hesk_input( hesk_POST('s_smtp_user') );
	$set['smtp_password']	= hesk_input( hesk_POST('s_smtp_password') );

	// Are new settings the same as old? If yes, skip testing connection, assume it works
	if ($check_old_settings)
	{
		$set['tmp_smtp_host_name']	= hesk_input( hesk_POST('tmp_smtp_host_name', 'localhost') );
		$set['tmp_smtp_host_port']	= intval( hesk_POST('tmp_smtp_host_port', 25) );
		$set['tmp_smtp_timeout']	= intval( hesk_POST('tmp_smtp_timeout', 10) );
		$set['tmp_smtp_ssl']		= empty($_POST['tmp_smtp_ssl']) ? 0 : 1;
		$set['tmp_smtp_tls']		= empty($_POST['tmp_smtp_tls']) ? 0 : 1;
		$set['tmp_smtp_user']		= hesk_input( hesk_POST('tmp_smtp_user') );
		$set['tmp_smtp_password']	= hesk_input( hesk_POST('tmp_smtp_password') );

		if (
			$set['tmp_smtp_host_name'] != 'mail.example.com'      && // Default setting
			$set['tmp_smtp_host_name'] == $set['smtp_host_name'] &&
			$set['tmp_smtp_host_port'] == $set['smtp_host_port'] &&
			$set['tmp_smtp_timeout']   == $set['smtp_timeout']   &&
			$set['tmp_smtp_ssl']       == $set['smtp_ssl']       &&
			$set['tmp_smtp_tls']       == $set['smtp_tls']       &&
			$set['tmp_smtp_user']      == $set['smtp_user']      &&
			$set['tmp_smtp_password']  == $set['smtp_password']
		)
		{
			return true;
		}
	}    

	// Initiate SMTP class and set parameters
	require_once(HESK_PATH . 'inc/mail/smtp.php');
	$smtp = new smtp_class;
	$smtp->host_name	= $set['smtp_host_name'];
	$smtp->host_port	= $set['smtp_host_port'];
	$smtp->timeout		= $set['smtp_timeout'];
	$smtp->ssl			= $set['smtp_ssl'];
	$smtp->start_tls	= $set['smtp_tls'];
	$smtp->user			= $set['smtp_user'];
	$smtp->password		= hesk_htmlspecialchars_decode(stripslashes($set['smtp_password']));
	$smtp->debug		= 1;

	if (strlen($set['smtp_user']) || strlen($set['smtp_password']))
	{
		require_once(HESK_PATH . 'inc/mail/sasl/sasl.php');
	}

	$connection_OK = false;

	ob_start();

	// Test connection
	if ($smtp->Connect())
	{
		// SMTP connect successful
	    $connection_OK = true;
		$smtp->Disconnect();
	}
    else
    {
    	global $smtp_error, $smtp_log;
        $smtp_error = ucfirst($smtp->error);
		$smtp_log   = ob_get_contents();
    }

    $smtp_log   = ob_get_contents();
	ob_end_clean();

    return $connection_OK;
} // END hesk_testSMTP()


function hesk_testIMAP($check_old_settings=false)
{
	global $hesk_settings, $hesklang, $set;

	$set['imap_host_name']	= hesk_input( hesk_POST('s_imap_host_name', 'mail.example.com') );
	$set['imap_host_port']	= intval( hesk_POST('s_imap_host_port', 993) );
	$set['imap_enc']		= hesk_POST('s_imap_enc');
	$set['imap_enc']        = ($set['imap_enc'] == 'ssl' || $set['imap_enc'] == 'tls') ? $set['imap_enc'] : '';
	$set['imap_keep']		= empty($_POST['s_imap_keep']) ? 0 : 1;
	$set['imap_user']		= hesk_input( hesk_POST('s_imap_user') );
	$set['imap_password']	= hesk_input( hesk_POST('s_imap_password') );

	// Are new settings the same as old? If yes, skip testing connection, assume it works
	if ($check_old_settings)
	{
		$set['tmp_imap_host_name']	= hesk_input( hesk_POST('tmp_imap_host_name', 'mail.example.com') );
		$set['tmp_imap_host_port']	= intval( hesk_POST('tmp_imap_host_port', 993) );
		$set['tmp_imap_enc']		= hesk_POST('s_imap_enc');
		$set['tmp_imap_enc']        = ($set['tmp_imap_enc'] == 'ssl' || $set['tmp_imap_enc'] == 'tls') ? $set['tmp_imap_enc'] : '';
		$set['tmp_imap_keep']		= empty($_POST['tmp_imap_keep']) ? 0 : 1;
		$set['tmp_imap_user']		= hesk_input( hesk_POST('tmp_imap_user') );
		$set['tmp_imap_password']	= hesk_input( hesk_POST('tmp_imap_password') );

		if (
			$set['tmp_imap_host_name'] != 'mail.example.com'      && // Default setting
			$set['tmp_imap_host_name'] == $set['imap_host_name'] &&
			$set['tmp_imap_host_port'] == $set['imap_host_port'] &&
			$set['tmp_imap_enc']       == $set['imap_enc']       &&
			$set['tmp_imap_keep']      == $set['imap_keep']      &&
			$set['tmp_imap_user']      == $set['imap_user']      &&
			$set['tmp_imap_password']  == $set['imap_password']
		)
		{
			return true;
		}
	}

    $connection_OK = false;

    ob_start();

    // IMAP mailbox based on required encryption
    switch ($set['imap_enc'])
    {
        case 'ssl':
            $set['imap_mailbox'] = '{'.$set['imap_host_name'].':'.$set['imap_host_port'].'/imap/ssl/novalidate-cert}';
            break;
        case 'tls':
            $set['imap_mailbox'] = '{'.$set['imap_host_name'].':'.$set['imap_host_port'].'/imap/tls/novalidate-cert}';
            break;
        default:
            $set['imap_mailbox'] = '{'.$set['imap_host_name'].':'.$set['imap_host_port'].'}';
    }

    $set['imap_password'] = hesk_htmlspecialchars_decode(stripslashes($set['imap_password']));

    // Connect to IMAP
    $imap = @imap_open($set['imap_mailbox'], $set['imap_user'], $set['imap_password']);

    // Connection successful?
    if ($imap !== false)
    {
        // Try reading the mailbox
        imap_search($imap, 'UNSEEN');

        // Close IMAP connection
        imap_close($imap);
    }

    // Any error messages?
    if($errors = imap_errors())
    {
        global $imap_error, $imap_log;

        $imap_error = end($errors);
        reset($errors);

        $imap_log = '';

        foreach ($errors as $error)
        {
            $imap_log .= hesk_htmlspecialchars($error) . "\n";
        }
    }
    else
    {
        // Connection OK
        $connection_OK = true;
    }

    ob_end_clean();

    return $connection_OK;
} // END hesk_testIMAP()


function hesk_generate_SPAM_question()
{
	$useChars = 'AEUYBDGHJLMNPRSTVWXZ23456789';
	$ac = $useChars[mt_rand(0,27)];
	for($i=1;$i<5;$i++)
	{
	    $ac .= $useChars[mt_rand(0,27)];
	}

    $animals = array('dog','cat','cow','pig','elephant','tiger','chicken','bird','fish','alligator','monkey','mouse','lion','turtle','crocodile','duck','gorilla','horse','penguin','dolphin','rabbit','sheep','snake','spider');
    $not_animals = array('ball','window','house','tree','earth','money','rocket','sun','star','shirt','snow','rain','air','candle','computer','desk','coin','TV','paper','bell','car','baloon','airplane','phone','water','space');

    $keys = array_rand($animals,2);
    $my_animals[] = $animals[$keys[0]];
    $my_animals[] = $animals[$keys[1]];

    $keys = array_rand($not_animals,2);
    $my_not_animals[] = $not_animals[$keys[0]];
    $my_not_animals[] = $not_animals[$keys[1]];

	$my_animals[] = $my_not_animals[0];
    $my_not_animals[] = $my_animals[0];

    $e = mt_rand(1,9);
    $f = $e + 1;
    $d = mt_rand(1,9);
    $s = intval($e + $d);

    if ($e == $d)
    {
    	$d ++;
    	$h = $d;
        $l = $e;
    }
    elseif ($e < $d)
    {
    	$h = $d;
        $l = $e;
    }
    else
    {
    	$h = $e;
        $l = $d;
    }

    $spam_questions = array(
    	$f => 'What is the next number after '.$e.'? (Use only digits to answer)',
    	'white' => 'What color is snow? (give a 1 word answer to show you are a human)',
    	'green' => 'What color is grass? (give a 1 word answer to show you are a human)',
    	'blue' => 'What color is water? (give a 1 word answer to show you are a human)',
    	$ac => 'Access code (type <b>'.$ac.'</b> here):',
    	$ac => 'Type <i>'.$ac.'</i> here to fight SPAM:',
    	$s => 'Solve this equation to show you are human: '.$e.' + '.$d.' = ',
    	$my_animals[2] => 'Which of these is not an animal: ' . implode(', ',hesk_randomize_array($my_animals)),
    	$my_not_animals[2] => 'Which of these is an animal: ' . implode(', ',hesk_randomize_array($my_not_animals)),
    	$h => 'Which number is higher <b>'.$e.'</b> or <b>'.$d.'</b>:',
    	$l => 'Which number is lower <b>'.$e.'</b> or <b>'.$d.'</b>:',
        'no' => 'Are you a robot? (yes or no)',
        'yes' => 'Are you a human? (yes or no)'
    );

    $r = array_rand($spam_questions);
	$ask = $spam_questions[$r];
    $ans = $r;

    return array($ask,$ans);
} // END hesk_generate_SPAM_question()


function hesk_randomize_array($array)
{
	$rand_items = array_rand($array, count($array));
	$new_array = array();
	foreach($rand_items as $value)
	{
	    $new_array[$value] = $array[$value];
	}

	return $new_array;
} // END hesk_randomize_array()


function hesk_checkMinMax($myint,$min,$max,$defval)
{
	if ($myint > $max || $myint < $min)
	{
		return $defval;
	}
	return $myint;
} // END hesk_checkMinMax()
