<?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
 *
 */

define('IN_SCRIPT',1);
define('HESK_PATH','../');

define('INSTALL_PAGE', 'update.php');
require(HESK_PATH . 'install/install_functions.inc.php');

// Convert old database settings
if (isset($hesk_settings['database_user']))
{
	$hesk_settings['db_user'] = $hesk_settings['database_user'];
	$hesk_settings['db_name'] = $hesk_settings['database_name'];
	$hesk_settings['db_pass'] = $hesk_settings['database_pass'];
	$hesk_settings['db_host'] = $hesk_settings['database_host'];
}

// Set the table prefix to default for versions older than 2.0
if ( ! isset($hesk_settings['db_pfix']))
{
	$hesk_settings['db_pfix'] = 'hesk_';
}

// If no step is defined, start with step 1
if ( ! isset($_SESSION['step']) )
{
    $_SESSION['step']=1;
}
// Check if the license has been agreed to and verify sessions are working
elseif ($_SESSION['step']==1)
{
    $agree = hesk_POST('agree', '');
    if ($agree == 'YES')
    {
		// Are sessions working?
		if ( empty($_SESSION['works']) )
        {
        	hesk_iSessionError();
        }

		// All OK, continue
        $_SESSION['license_agree']=1;
        $_SESSION['step']=2;
    }
    else
    {
        $_SESSION['step']=1;
    }
}

// Test database connection?
if ($_SESSION['step'] == 3)
{
    // Test MySQL connection
    if (isset($_POST['dbtest']))
    {
        // Get timezone info
        $hesk_settings['timezone'] = hesk_input( hesk_POST('timezone') );
        if ( ! in_array($hesk_settings['timezone'], timezone_identifiers_list()) )
        {
            $hesk_settings['timezone'] = 'UTC';
        }

        // Test MySQL connection using provided data
        $hesk_db_link = hesk_iTestDatabaseConnection();
    }
    else
    {
       // Force selecting a timezone for versions prior to 2.8.0
       if (version_compare(HESK_NEW_VERSION,'2.8.0','<='))
       {
           hesk_iDatabase(6);
       }

       // Test MySQL connection using saved data
       $hesk_db_link = hesk_iTestDatabaseConnection(true);
    }

	// Detect which version we are updating from
	$hesk_settings['update_from'] = hesk_iDetectVersion();

	// Is the installed version current?
	if ($hesk_settings['update_from'] == HESK_NEW_VERSION)
    {
		hesk_iDatabase(4);
    }

	// All ok, let's save settings
	hesk_iSaveSettings();

	// Now update HESK database tables
	hesk_iUpdateTables();

    // Do we need to migrate customers?
    $ticket_count = hesk_dbQuery("SELECT 1 FROM `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` LIMIT 1");
    $any_tickets = hesk_dbNumRows($ticket_count) > 0;

    if ($any_tickets) {
        $_SESSION['step']=4;
    } else {
        hesk_iDropOldPreCustomerColumns();
        $_SESSION['step']=5;
    }
}

if ($_SESSION['step'] == 4) {
    // Have customer accounts been migrated?
    if (hesk_REQUEST('migration-complete')) {
        $_SESSION['step'] = 5;
    } else {
        $reply_name_column_gone = hesk_dbQuery("SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS 
         WHERE TABLE_SCHEMA = '" . hesk_dbEscape($hesk_settings['db_name']) . "' 
           AND TABLE_NAME = '" . hesk_dbEscape($hesk_settings['db_pfix']) . "replies' 
           AND COLUMN_NAME = 'name'");

        if (hesk_dbNumRows($reply_name_column_gone) === 0) {
            $_SESSION['step'] = 5;
        }
    }
}

// Which step are we at?
switch ($_SESSION['step'])
{
	case 2:
	   hesk_iCheckSetup();
	   break;
	case 3:
	   hesk_iDatabase();
	   break;
    case 4:
       hesk_iCustomerMigrationIntro();
       break;
	case 5:
	   hesk_iFinish();
	   break;
	default:
	   hesk_iStart();
}


// ******* FUNCTIONS ******* //


function hesk_iFinish()
{
    global $hesk_settings;
    hesk_purge_cache();
    hesk_iHeader();
	?>

	<h3>Update database tables</h3>

	<br />
	<?php hesk_show_success('Congratulations, your HESK has been updated to ' . HESK_NEW_VERSION); ?>

    <?php
    if (defined('RECAPTCHA_V1'))
    {
        hesk_show_notice('reCaptcha V1 is no longer supported and has been disabled.<br /><br />Please enable a different anti-SPAM measure in HESK settings.');
    }
    ?>

    <h3>Things to do next:</h3>

    <ol>

    <li><span style="color:#ff0000">Delete the <b>/install</b> folder from your server!</span><br />&nbsp;</li>

    <li>Login to HESK administration panel and make sure everything works fine.<br /><br />

	<form action="<?php echo HESK_PATH . $hesk_settings['admin_dir']; ?>/admin_main.php" method="get">
	<input type="submit" value="Continue to admin panel &raquo;" class="orangebutton" onmouseover="hesk_btn(this,'orangebuttonover');" onmouseout="hesk_btn(this,'orangebutton');" /></p>
	</form>

    </li>

    </ol>

    <p>&nbsp;</p>

	<?php
    hesk_iFooter();
} // End hesk_iFinish()


function hesk_iUpdateTables()
{
	global $hesk_db_link, $hesk_settings, $hesklang;

    $update_all_next = 0;

    // Force update possible MySQL strict issues before attempting anything else
    if (in_array($hesk_settings['update_from'], array('2.6', '2.5', '2.4', '2.3', '2.2', '2.1', '2.0', '0.94.1', '0.94', '0.91-0.93.1', '0.90')))
    {
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` CHANGE `dt` `dt` timestamp NOT NULL DEFAULT '2000-01-01 00:00:00'");
    }

	// Updating version 0.90 to 0.91
	if ($hesk_settings['update_from'] == '0.90')
	{
		hesk_dbQuery("ALTER TABLE `hesk_users` ADD `notify` CHAR( 1 ) DEFAULT '1' NOT NULL");
        $update_all_next = 1;
	} // END version 0.90 to 0.91


	// Updating versions 0.91 through 0.93.1 to 0.94
	if ($update_all_next || $hesk_settings['update_from'] == '0.91-0.93.1')
	{
		hesk_dbQuery("CREATE TABLE `hesk_attachments` (
		  `att_id` mediumint(8) unsigned NOT NULL auto_increment,
		  `ticket_id` varchar(10) NOT NULL default '',
		  `saved_name` varchar(255) NOT NULL default '',
		  `real_name` varchar(255) NOT NULL default '',
		  `size` int(10) unsigned NOT NULL default '0',
		  PRIMARY KEY  (`att_id`),
		  KEY `ticket_id` (`ticket_id`)
		) ENGINE=MyISAM");

		hesk_dbQuery("CREATE TABLE `hesk_std_replies` (
		`id` smallint(5) unsigned NOT NULL auto_increment,
		`title` varchar(70) NOT NULL default '',
		`message` text NOT NULL,
		`reply_order` smallint(5) unsigned NOT NULL default '0',
		PRIMARY KEY  (`id`)
		) ENGINE=MyISAM");

		hesk_dbQuery("ALTER TABLE `hesk_categories`
		CHANGE `name` `name` varchar(60) NOT NULL default '',
		ADD `cat_order` smallint(5) unsigned NOT NULL default '0'");

		hesk_dbQuery("ALTER TABLE `hesk_replies`
		CHANGE `name` `name` varchar(50) NOT NULL default '',
		ADD `attachments` TEXT");

		hesk_dbQuery("ALTER TABLE `hesk_tickets`
		CHANGE `name` `name` varchar(50) NOT NULL default '',
		CHANGE `category` `category` SMALLINT(5) UNSIGNED NOT NULL DEFAULT '1',
		CHANGE `priority` `priority` enum('1','2','3') NOT NULL default '3',
		CHANGE `subject` `subject` varchar(70) NOT NULL default '',
		ADD `lastchange` datetime NOT NULL AFTER `dt`,
		CHANGE `status` `status` enum('0','1','2','3') default '1',
		ADD `lastreplier` enum('0','1') NOT NULL default '0',
		ADD `archive` enum('0','1') NOT NULL default '0',
		ADD `attachments` text,
		ADD `custom1` VARCHAR( 255 ) NOT NULL default '',
		ADD `custom2` VARCHAR( 255 ) NOT NULL default '',
		ADD `custom3` VARCHAR( 255 ) NOT NULL default '',
		ADD `custom4` VARCHAR( 255 ) NOT NULL default '',
		ADD `custom5` VARCHAR( 255 ) NOT NULL default '',
		ADD INDEX `archive` ( `archive` )");

		// Change status of closed tickets to the new "Resolved" status
		hesk_dbQuery("UPDATE `hesk_tickets` SET `status`='3' WHERE `status`='0'");

		// Populate lastchange
		hesk_dbQuery("UPDATE `hesk_tickets` SET `lastchange`=`dt`");

		// Update categories with order values
		$res = hesk_dbQuery("SELECT `id` FROM `hesk_categories`");
		$i = 10;
		while ($mycat=hesk_dbFetchAssoc($res))
		{
			hesk_dbQuery("UPDATE `hesk_categories` SET `cat_order`=$i WHERE `id`=" . intval($mycat['id']));
			$i += 10;
		}

        $update_all_next = 1;
	} // END versions 0.91 through 0.93.1 to 0.94


    // Updating version 0.94 to 0.94.1
    if ($hesk_settings['update_from'] == '0.94')
    {
		hesk_dbQuery("CREATE TABLE `hesk_attachments` (
		  `att_id` mediumint(8) unsigned NOT NULL auto_increment,
		  `ticket_id` varchar(10) NOT NULL default '',
		  `saved_name` varchar(255) NOT NULL default '',
		  `real_name` varchar(255) NOT NULL default '',
		  `size` int(10) unsigned NOT NULL default '0',
		  PRIMARY KEY  (`att_id`),
		  KEY `ticket_id` (`ticket_id`)
		) ENGINE=MyISAM");

		if ($hesk_settings['attachments']['use'])
		{
			/* Update attachments for tickets */
			$res = hesk_dbQuery("SELECT * FROM `hesk_tickets` WHERE `attachments` != '' ");
			while ($ticket = hesk_dbFetchAssoc($res))
			{
				$att=explode('#####',substr($ticket['attachments'], 0, -5));
				$myattachments = '';
				foreach ($att as $myatt)
				{
					$name = substr(strstr($myatt, $ticket['trackid']),16);
					$saved_name = strstr($myatt, $ticket['trackid']);
					$size = filesize($hesk_settings['server_path'].'/attachments/'.$saved_name);

					hesk_dbQuery("INSERT INTO `hesk_attachments` (`ticket_id`,`saved_name`,`real_name`,`size`) VALUES ('".hesk_dbEscape($ticket['trackid'])."', '".hesk_dbEscape($saved_name)."', '".hesk_dbEscape($name)."', '".intval($size)."')");
					$myattachments .= hesk_dbInsertID() . '#' . $name .',';
				}

				hesk_dbQuery("UPDATE `hesk_tickets` SET `attachments` = '".hesk_dbEscape($myattachments)."' WHERE `id` = ".intval($ticket['id']));
			}

			// Update attachments for replies
			$res = hesk_dbQuery("SELECT * FROM `hesk_replies` WHERE `attachments` != '' ");
			while ($ticket = hesk_dbFetchAssoc($res))
			{
				$res2 = hesk_dbQuery("SELECT `trackid` FROM `hesk_tickets` WHERE `id` = '".intval($ticket['replyto'])."' LIMIT 1");
				$trackingID = hesk_dbResult($res2,0,0);

				$att=explode('#####',substr($ticket['attachments'], 0, -5));
				$myattachments = '';
				foreach ($att as $myatt)
                {
					$name = substr(strstr($myatt, $trackingID),16);
					$saved_name = strstr($myatt, $trackingID);
					$size = filesize($hesk_settings['server_path'].'/attachments/'.$saved_name);

					hesk_dbQuery("INSERT INTO `hesk_attachments` (`ticket_id`,`saved_name`,`real_name`,`size`) VALUES ('".hesk_dbEscape($trackingID)."', '".hesk_dbEscape($saved_name)."', '".hesk_dbEscape($name)."', '".intval($size)."')");
					$myattachments .= hesk_dbInsertID() . '#' . $name .',';
				}

				hesk_dbQuery("UPDATE `hesk_replies` SET `attachments` = '".hesk_dbEscape($myattachments)."' WHERE `id` = ".intval($ticket['id']));
			}
		}  // END if attachments use

        $update_all_next = 1;
    } // END version 0.94 to 0.94.1


	// Updating version 0.94.1 to 2.0
	if ($update_all_next || $hesk_settings['update_from'] == '0.94.1')
	{
		hesk_dbQuery("CREATE TABLE `hesk_kb_articles` (
		  `id` smallint(5) unsigned NOT NULL auto_increment,
		  `catid` smallint(5) unsigned NOT NULL default '0',
		  `dt` timestamp NOT NULL default CURRENT_TIMESTAMP,
		  `author` smallint(5) unsigned NOT NULL default '0',
		  `subject` varchar(255) NOT NULL default '',
		  `content` text NOT NULL,
		  `rating` float NOT NULL default '0',
		  `votes` mediumint(8) unsigned NOT NULL default '0',
		  `views` mediumint(8) unsigned NOT NULL default '0',
		  `type` enum('0','1','2') NOT NULL default '0',
		  `html` enum('0','1') NOT NULL default '0',
		  `art_order` smallint(5) unsigned NOT NULL default '0',
		  `history` text NOT NULL,
		  PRIMARY KEY  (`id`),
		  KEY `catid` (`catid`),
		  KEY `type` (`type`),
		  FULLTEXT KEY `subject` (`subject`,`content`)
		) ENGINE=MyISAM");

		hesk_dbQuery("CREATE TABLE `hesk_kb_categories` (
		  `id` smallint(5) unsigned NOT NULL auto_increment,
		  `name` varchar(255) NOT NULL default '',
		  `parent` smallint(5) unsigned NOT NULL default '0',
		  `articles` smallint(5) unsigned NOT NULL default '0',
		  `cat_order` smallint(5) unsigned NOT NULL default '0',
		  `type` enum('0','1') NOT NULL default '0',
		  PRIMARY KEY  (`id`),
		  KEY `type` (`type`)
		) ENGINE=MyISAM");

		hesk_dbQuery("INSERT INTO `hesk_kb_categories` VALUES (1, 'Knowledgebase', 0, 0, 10, '0')");

		hesk_dbQuery("CREATE TABLE `hesk_notes` (
		  `id` mediumint(8) unsigned NOT NULL auto_increment,
		  `ticket` mediumint(8) unsigned NOT NULL default '0',
		  `who` smallint(5) unsigned NOT NULL default '0',
		  `dt` datetime NOT NULL,
		  `message` text NOT NULL,
		  PRIMARY KEY  (`id`),
		  KEY `ticketid` (`ticket`)
		) ENGINE=MyISAM");

	    $sql = array();
		$sql[] = "ALTER TABLE `hesk_replies` ADD `staffid` SMALLINT UNSIGNED NOT NULL DEFAULT '0'";
		$sql[] = "ALTER TABLE `hesk_replies` ADD `rating` ENUM( '1', '5' ) default NULL";

		$sql[] = "ALTER TABLE `hesk_tickets` ADD INDEX `categories` ( `category` )";
		$sql[] = "ALTER TABLE `hesk_tickets` ADD INDEX `statuses` ( `status` ) ";
		$sql[] = "ALTER TABLE `hesk_tickets` CHANGE `custom1` `custom1` text NOT NULL";
		$sql[] = "ALTER TABLE `hesk_tickets` CHANGE `custom2` `custom2` text NOT NULL";
		$sql[] = "ALTER TABLE `hesk_tickets` CHANGE `custom3` `custom3` text NOT NULL";
		$sql[] = "ALTER TABLE `hesk_tickets` CHANGE `custom4` `custom4` text NOT NULL";
		$sql[] = "ALTER TABLE `hesk_tickets` CHANGE `custom5` `custom5` text NOT NULL";
		$sql[] = "ALTER TABLE `hesk_tickets` ADD `custom6` text NOT NULL";
		$sql[] = "ALTER TABLE `hesk_tickets` ADD `custom7` text NOT NULL";
		$sql[] = "ALTER TABLE `hesk_tickets` ADD `custom8` text NOT NULL";
		$sql[] = "ALTER TABLE `hesk_tickets` ADD `custom9` text NOT NULL";
		$sql[] = "ALTER TABLE `hesk_tickets` ADD `custom10` text NOT NULL";

		$sql[] = "ALTER TABLE `hesk_users` CHANGE `pass` `pass` CHAR( 40 ) NOT NULL";
		$sql[] = "ALTER TABLE `hesk_users` CHANGE `isadmin` `isadmin` ENUM( '0', '1' ) NOT NULL DEFAULT '0'";
		$sql[] = "ALTER TABLE `hesk_users` CHANGE `notify` `notify` ENUM( '0', '1' ) NOT NULL DEFAULT '1'";
		$sql[] = "ALTER TABLE `hesk_users` ADD `heskprivileges` VARCHAR( 255 ) NOT NULL";
		$sql[] = "ALTER TABLE `hesk_users` ADD `ratingneg` mediumint(8) unsigned NOT NULL default '0'";
		$sql[] = "ALTER TABLE `hesk_users` ADD `ratingpos` mediumint(8) unsigned NOT NULL default '0'";
		$sql[] = "ALTER TABLE `hesk_users` ADD `rating` float NOT NULL default '0'";
		$sql[] = "ALTER TABLE `hesk_users` ADD `replies` mediumint(8) unsigned NOT NULL default '0'";

		$sql[] = "ALTER TABLE `hesk_std_replies` CHANGE `title` `title` VARCHAR( 100 ) NOT NULL";

		foreach ($sql as $s)
	    {
			hesk_dbQuery($s);
	    }

	    // Update passwords to the new type and hesk privileges for non-admins */
		$res = hesk_dbQuery('SELECT `id`,`pass`,`isadmin` FROM `hesk_users` ORDER BY `id` ASC');

	    $sql = array();
		while ($row=hesk_dbFetchAssoc($res))
		{
			$new_pass = hesk_password_hash($row['pass']);
	        $s = "UPDATE `hesk_users` SET `pass`='".hesk_dbEscape($new_pass)."' ";
	        if ($row['isadmin'] == 0)
	        {
	        	$s .= ", `heskprivileges`='can_view_tickets,can_reply_tickets,can_change_cat,' ";
	        }
	        $s.= "WHERE `id`=".intval($row['id']);
	        $sql[] = $s;
		}

		foreach ($sql as $s)
	    {
			hesk_dbQuery($s);
	    }

        $update_all_next = 1;
    } // END version 0.94.1 to 2.0


	// Updating version 2.0 to 2.1
	if ($update_all_next || $hesk_settings['update_from'] == '2.0')
	{
		hesk_dbQuery("CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."kb_attachments` (
		  `att_id` mediumint(8) unsigned NOT NULL AUTO_INCREMENT,
		  `saved_name` varchar(255) NOT NULL DEFAULT '',
		  `real_name` varchar(255) NOT NULL DEFAULT '',
		  `size` int(10) unsigned NOT NULL DEFAULT '0',
		  PRIMARY KEY (`att_id`)
		) ENGINE=MyISAM");

		$sql = array();
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."kb_articles` ADD `attachments` TEXT NOT NULL";

    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` ADD `custom11` text NOT NULL";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` ADD `custom12` text NOT NULL";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` ADD `custom13` text NOT NULL";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` ADD `custom14` text NOT NULL";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` ADD `custom15` text NOT NULL";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` ADD `custom16` text NOT NULL";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` ADD `custom17` text NOT NULL";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` ADD `custom18` text NOT NULL";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` ADD `custom19` text NOT NULL";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` ADD `custom20` text NOT NULL";

    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` ADD `afterreply` ENUM( '0', '1', '2' ) NOT NULL DEFAULT '0' AFTER `categories`";

		foreach ($sql as $s)
	    {
			hesk_dbQuery($s);
	    }

        $update_all_next = 1;
	} // END version 2.0 to 2.1


	// Updating version 2.1 to 2.2
	if ($update_all_next || $hesk_settings['update_from'] == '2.1')
	{
		hesk_dbQuery("
		CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."mail` (
		  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
		  `from` smallint(5) unsigned NOT NULL,
		  `to` smallint(5) unsigned NOT NULL,
		  `subject` varchar(255) NOT NULL,
		  `message` text NOT NULL,
		  `dt` datetime NOT NULL,
		  `read` enum('0','1') NOT NULL DEFAULT '0',
		  `deletedby` smallint(5) unsigned NOT NULL DEFAULT '0',
		  PRIMARY KEY (`id`),
		  KEY `recipients` (`from`,`to`)
		) ENGINE=MyISAM
		");

		$sql = array();

    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` ADD `replierid` SMALLINT UNSIGNED NULL AFTER `lastreplier`";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` ADD `owner` SMALLINT UNSIGNED NOT NULL DEFAULT '0' AFTER `status`";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` ADD `locked` ENUM( '0', '1' ) NOT NULL DEFAULT '0' AFTER `archive`";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` ADD `history` TEXT NOT NULL AFTER `attachments`";

    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` CHANGE `notify` `notify_new_unassigned` ENUM( '0', '1' ) NOT NULL DEFAULT '1'";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` ADD `notify_new_my` ENUM( '0', '1' ) NOT NULL DEFAULT '1' AFTER `notify_new_unassigned`";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` ADD `notify_reply_unassigned` ENUM( '0', '1' ) NOT NULL DEFAULT '1' AFTER `notify_new_my`";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` ADD `notify_reply_my` ENUM( '0', '1' ) NOT NULL DEFAULT '1' AFTER `notify_reply_unassigned`";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` ADD `notify_assigned` ENUM( '0', '1' ) NOT NULL DEFAULT '1' AFTER `notify_reply_my`";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` ADD `notify_pm` ENUM( '0', '1' ) NOT NULL DEFAULT '1' AFTER `notify_assigned`";

        $sql[] = "UPDATE  `".hesk_dbEscape($hesk_settings['db_pfix'])."users` SET `categories` = TRIM(TRAILING ',' FROM `categories`)";
        $sql[] = "UPDATE  `".hesk_dbEscape($hesk_settings['db_pfix'])."users` SET `heskprivileges` = TRIM(TRAILING ',' FROM `heskprivileges`)";

		foreach ($sql as $s)
	    {
			hesk_dbQuery($s);
	    }

		// Update privileges - anyone can assign ticket to himself/herself by default
		hesk_dbQuery("UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` SET `heskprivileges`=CONCAT(`heskprivileges`,',can_assign_self') WHERE `isadmin`!='1' ");

        $update_all_next = 1;
	} // END version 2.1 to 2.2


	// Updating version 2.2 to 2.3
	if ($update_all_next || $hesk_settings['update_from'] == '2.2')
	{
    	// Logins table
		hesk_dbQuery("
		CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."logins` (
		  `ip` varchar(46) NOT NULL,
		  `number` tinyint(3) unsigned NOT NULL DEFAULT '1',
		  `last_attempt` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
		  UNIQUE KEY `ip` (`ip`)
		) ENGINE=MyISAM
		");

        // Online table
		hesk_dbQuery("
		CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."online` (
		  `user_id` smallint(5) unsigned NOT NULL,
		  `dt` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
		  `tmp` int(11) unsigned NOT NULL DEFAULT '0',
		  UNIQUE KEY `user_id` (`user_id`),
		  KEY `dt` (`dt`)
		) ENGINE=MyISAM
		");

		$sql = array();

    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` CHANGE `trackid` `trackid` VARCHAR( 13 ) NOT NULL";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` CHANGE `priority` `priority` ENUM( '0', '1', '2', '3' ) NOT NULL DEFAULT '3'";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` CHANGE `status` `status` ENUM('0','1','2','3','4','5') NOT NULL DEFAULT '0'";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` CHANGE `ip` `ip` VARCHAR( 46 ) NOT NULL DEFAULT ''";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` CHANGE `lastchange` `lastchange` TIMESTAMP on update CURRENT_TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` CHANGE `email` `email` VARCHAR(255) NOT NULL";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` ADD INDEX (`owner`) ";

    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` CHANGE `heskprivileges` `heskprivileges` TEXT NOT NULL";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` ADD `autoassign` ENUM('0','1') NOT NULL DEFAULT '1' AFTER `notify_pm`";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` ADD `default_list` VARCHAR( 255) NOT NULL DEFAULT '' AFTER `notify_pm`";
    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` ADD INDEX (`autoassign`) ";

    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."attachments` CHANGE `ticket_id` `ticket_id` VARCHAR(13) NOT NULL DEFAULT ''";

    	$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."replies` CHANGE `replyto` `replyto` MEDIUMINT(8) UNSIGNED NOT NULL DEFAULT '0'";

		foreach ($sql as $s)
	    {
			hesk_dbQuery($s);
	    }

        // Update staff with new permissions (allowed by default)
		$res = hesk_dbQuery("SELECT `id`,`heskprivileges` FROM `".hesk_dbEscape($hesk_settings['db_pfix'])."users` WHERE `isadmin` != '1' ");
		while ($row=hesk_dbFetchAssoc($res))
		{
			// Not admin, is user allowed to view tickets?
			if (strpos($row['heskprivileges'], 'can_view_tickets') !== false)
			{
				hesk_dbQuery("UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` SET `heskprivileges`=CONCAT(`heskprivileges`,',can_view_unassigned,can_view_online') WHERE `id`=".intval($row['id']));
			}
            else
            {
				hesk_dbQuery("UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` SET `heskprivileges`=CONCAT(`heskprivileges`,',can_view_online') WHERE `id`=".intval($row['id']));
            }
		}

        $update_all_next = 1;
	} // END version 2.2 to 2.3


	// Updating version 2.3 to 2.4
	if ($update_all_next || $hesk_settings['update_from'] == '2.3')
	{
    	// Email loops table
		hesk_dbQuery("
		CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."pipe_loops` (
		  `email` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
		  `hits` smallint(1) unsigned NOT NULL DEFAULT '0',
		  `message_hash` char(32) COLLATE utf8_unicode_ci NOT NULL,
		  `dt` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
		  KEY `email` (`email`,`hits`)
		) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
		");

		$sql = array();

		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."attachments` CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."categories` CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."kb_articles` CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."kb_attachments` CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."kb_categories` CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."logins` CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."mail` CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."notes` CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."online` CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."replies` CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."std_replies` CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci";

		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` ADD `language` VARCHAR(50) NULL DEFAULT NULL AFTER `ip`";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` ADD `merged` MEDIUMTEXT NOT NULL AFTER `attachments`";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` ADD `time_worked` TIME NOT NULL DEFAULT '00:00:00' AFTER `owner`";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` CHANGE `status` `status` ENUM( '0', '1', '2', '3', '4', '5' ) NOT NULL DEFAULT '0'";

		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` ADD `language` VARCHAR(50) NULL DEFAULT NULL AFTER `signature`";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` ADD `notify_note` ENUM( '0', '1' ) NOT NULL DEFAULT '1' AFTER `notify_pm`";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` ADD `autostart` ENUM( '0', '1' ) NOT NULL DEFAULT '1' AFTER `afterreply`";

		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."categories` ADD `autoassign` ENUM( '0', '1' ) NOT NULL DEFAULT '1', ADD `type` ENUM( '0', '1' ) NOT NULL DEFAULT '0', ADD INDEX ( `type` )";

		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."kb_articles` ADD `keywords` MEDIUMTEXT NOT NULL AFTER `content`";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."kb_articles` ADD `sticky` ENUM( '0', '1' ) NOT NULL DEFAULT '0' AFTER `html` , ADD INDEX ( `sticky` )";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."kb_articles` DROP INDEX `subject` , ADD FULLTEXT `subject` (`subject` , `content` , `keywords`)";

		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."replies` ADD `read` ENUM( '0', '1' ) NOT NULL DEFAULT '1'";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."replies` CHANGE `read` `read` ENUM( '0', '1' ) NOT NULL DEFAULT '0'";

		foreach ($sql as $s)
	    {
			hesk_dbQuery($s);
	    }

        // Update staff with new permissions (allowed by default)
		$res = hesk_dbQuery("SELECT `id`,`heskprivileges` FROM `".hesk_dbEscape($hesk_settings['db_pfix'])."users` WHERE `isadmin` != '1' ");
		while ($row=hesk_dbFetchAssoc($res))
		{
			// Not admin, is user allowed to view tickets?
			if (strpos($row['heskprivileges'], 'can_edit_tickets') !== false)
			{
				hesk_dbQuery("UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` SET `heskprivileges`=CONCAT(`heskprivileges`,',can_merge_tickets') WHERE `id`=".intval($row['id']));
			}
		}

        $update_all_next = 1;
	} // END version 2.3 to 2.4


    // Upgrade version 2.4.x to 2.5.0
	if ($update_all_next || $hesk_settings['update_from'] == '2.4')
	{
		$sql = array();

		// Make sure the 2.4 to 2.4.1 change is made
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."pipe_loops` CHANGE `hits` `hits` SMALLINT( 1 ) UNSIGNED NOT NULL DEFAULT '0' ";

		// 2.4.2 to 2.5.0 specific changes
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."kb_categories` CHANGE `articles` `articles` SMALLINT( 5 ) UNSIGNED NOT NULL DEFAULT '0'";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."kb_categories` ADD `articles_private` SMALLINT UNSIGNED NOT NULL DEFAULT '0' AFTER `articles` , ADD `articles_draft` SMALLINT UNSIGNED NOT NULL DEFAULT '0' AFTER `articles_private`";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."kb_categories` ADD INDEX ( `parent` )";

		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."mail` DROP INDEX `recipients`";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."mail` ADD INDEX ( `to`, `read`, `deletedby` )";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."mail` ADD INDEX ( `from` )";

		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."replies` CHANGE `rating` `rating` ENUM( '0', '1', '5' ) DEFAULT '0' ";
		$sql[] = "UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."replies` SET `rating` = '0' WHERE `rating` IS NULL OR `rating` = '' ";

		foreach ($sql as $s)
	    {
			hesk_dbQuery($s);
	    }

        // Update knowledgebase category article counts to reflect new fields
		$update_these = array();

		// Get a count of all articles grouped by category and type
		$res = hesk_dbQuery('SELECT `catid`, `type`, COUNT(*) AS `num` FROM `'.hesk_dbEscape($hesk_settings['db_pfix']).'kb_articles` GROUP BY `catid`, `type`');
		while ( $row = hesk_dbFetchAssoc($res) )
		{
	    	switch ($row['type'])
	        {
	        	case 0:
	            	$update_these[$row['catid']]['articles'] = $row['num'];
	                break;
	        	case 1:
	            	$update_these[$row['catid']]['articles_private'] = $row['num'];
	                break;
	        	default:
	            	$update_these[$row['catid']]['articles_draft'] = $row['num'];
	        }
		}

	    // Set all article counts to 0
		hesk_dbQuery("UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."kb_categories` SET `articles`=0, `articles_private`=0, `articles_draft`=0");

	    // Now update categories that have articles with correct values
	    foreach ($update_these as $catid => $value)
	    {
	    	$value['articles'] = isset($value['articles']) ? $value['articles'] : 0;
	    	$value['articles_private'] = isset($value['articles_private']) ? $value['articles_private'] : 0;
	    	$value['articles_draft'] = isset($value['articles_draft']) ? $value['articles_draft'] : 0;
			hesk_dbQuery("UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."kb_categories` SET `articles`={$value['articles']}, `articles_private`={$value['articles_private']}, `articles_draft`={$value['articles_draft']} WHERE `id`='{$catid}'");

			// Force order articles
			$res = hesk_dbQuery("SELECT `id`, `sticky` FROM `".hesk_dbEscape($hesk_settings['db_pfix'])."kb_articles` WHERE `catid`='{$catid}' ORDER BY `sticky` DESC, `art_order` ASC");

			$i = 10;
			$previous_sticky = 1;

			while ( $article = hesk_dbFetchAssoc($res) )
			{
				if ($previous_sticky != $article['sticky'])
				{
					$i = 10;
					$previous_sticky = $article['sticky'];
				}
				hesk_dbQuery("UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."kb_articles` SET `art_order`=".intval($i)." WHERE `id`='".intval($article['id'])."'");
				$i += 10;
			}
	    }

		// Force order categories
		$res = hesk_dbQuery('SELECT `id`, `parent` FROM `'.hesk_dbEscape($hesk_settings['db_pfix']).'kb_categories` ORDER BY `parent` ASC, `cat_order` ASC');
		$i = 10;

		while ( $category = hesk_dbFetchAssoc($res) )
		{
			hesk_dbQuery("UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."kb_categories` SET `cat_order`=".intval($i)." WHERE `id`='".intval($category['id'])."'");
			$i += 10;
		}

		$update_all_next = 1;
	} // END version 2.4.0 to 2.5.0

	// 2.5.1 no changes
    // 2.5.2 no changes
    // 2.5.3 no changes
	// 2.5.4 no changes
	// 2.5.5 no changes

	// Upgrade version 2.5.x to 2.6.0
	if ($update_all_next || $hesk_settings['update_from'] == '2.5')
	{
		// -> Banned emails
		hesk_dbQuery("
		CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."banned_emails` (
		  `id` smallint(5) unsigned NOT NULL AUTO_INCREMENT,
		  `email` varchar(255) NOT NULL,
		  `banned_by` smallint(5) unsigned NOT NULL,
		  `dt` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
		  PRIMARY KEY (`id`),
		  KEY `email` (`email`)
		) ENGINE=MyISAM  DEFAULT CHARSET=utf8
		");

		// -> Banned IPs
		hesk_dbQuery("
		CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."banned_ips` (
		  `id` smallint(5) unsigned NOT NULL AUTO_INCREMENT,
		  `ip_from` int(10) unsigned NOT NULL DEFAULT '0',
		  `ip_to` int(10) unsigned NOT NULL DEFAULT '0',
		  `ip_display` varchar(100) NOT NULL,
		  `banned_by` smallint(5) unsigned NOT NULL,
		  `dt` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
		  PRIMARY KEY (`id`)
		) ENGINE=MyISAM  DEFAULT CHARSET=utf8
		");

		// -> Reply drafts
		hesk_dbQuery("
		CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."reply_drafts` (
		  `owner` smallint(5) unsigned NOT NULL,
		  `ticket` mediumint(8) unsigned NOT NULL,
		  `message` mediumtext CHARACTER SET utf8 NOT NULL,
		  `dt` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
		  KEY `owner` (`owner`),
		  KEY `ticket` (`ticket`)
		) ENGINE=MyISAM  DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
		");

		// -> Reset password
		hesk_dbQuery("
		CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."reset_password` (
		  `id` mediumint(8) unsigned NOT NULL AUTO_INCREMENT,
		  `user` smallint(5) unsigned NOT NULL,
		  `hash` char(40) NOT NULL,
		  `ip` varchar(45) NOT NULL,
		  `dt` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
		  PRIMARY KEY (`id`),
		  KEY `user` (`user`)
		) ENGINE=MyISAM  DEFAULT CHARSET=utf8;
		");

		// -> Service messages
		hesk_dbQuery("
		CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."service_messages` (
		  `id` smallint(5) unsigned NOT NULL AUTO_INCREMENT,
		  `dt` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
		  `author` smallint(5) unsigned NOT NULL,
		  `title` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
		  `message` mediumtext COLLATE utf8_unicode_ci NOT NULL,
		  `style` enum('0','1','2','3','4') COLLATE utf8_unicode_ci NOT NULL DEFAULT '0',
		  `type` enum('0','1') COLLATE utf8_unicode_ci NOT NULL DEFAULT '0',
		  `order` smallint(5) unsigned NOT NULL DEFAULT '0',
		  PRIMARY KEY (`id`),
		  KEY `type` (`type`)
		) ENGINE=MyISAM  DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
		");

		// -> Ticket templates
		hesk_dbQuery("
		CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."ticket_templates` (
		  `id` smallint(5) unsigned NOT NULL AUTO_INCREMENT,
		  `title` varchar(100) COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
		  `message` mediumtext COLLATE utf8_unicode_ci NOT NULL,
		  `tpl_order` smallint(5) unsigned NOT NULL DEFAULT '0',
		  PRIMARY KEY (`id`)
		) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
		");

		// 2.6.0 table changes
		$sql = array();

		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."mail` CHANGE `dt` `dt` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."notes` CHANGE `dt` `dt` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP";
		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."replies` CHANGE `dt` `dt` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP";

		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."attachments` ADD `type` ENUM( '0', '1' ) NOT NULL DEFAULT '0'";

		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."categories` ADD `priority` ENUM( '0', '1', '2', '3' ) NOT NULL DEFAULT '3'";

		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."kb_categories` CHANGE `type` `type` ENUM('0','1') CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL DEFAULT '0'";

		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."logins` CHANGE `ip` `ip` VARCHAR(45) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL";

		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."notes` ADD `attachments` MEDIUMTEXT NOT NULL";

		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."pipe_loops` CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci";

		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."replies` CHANGE `rating` `rating` ENUM('1','5') CHARACTER SET utf8 COLLATE utf8_unicode_ci NULL DEFAULT NULL, ADD INDEX(`dt`),  ADD INDEX(`staffid`)";

		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets`
					CHANGE `email` `email` VARCHAR( 1000 ) NOT NULL DEFAULT '',
					CHANGE `ip` `ip` VARCHAR(45) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
					ADD `firstreply` TIMESTAMP NULL DEFAULT NULL AFTER `lastchange`,
					ADD `closedat` TIMESTAMP NULL DEFAULT NULL AFTER `firstreply`,
					ADD `articles` VARCHAR(255) NULL DEFAULT NULL AFTER `closedat`,
					ADD `openedby` MEDIUMINT(8) DEFAULT '0' AFTER `status`,
					ADD `firstreplyby` SMALLINT(5) UNSIGNED NULL DEFAULT NULL AFTER `openedby`,
					ADD `closedby` MEDIUMINT(8) NULL DEFAULT NULL AFTER `firstreplyby`,
					ADD `replies` SMALLINT(5) UNSIGNED NOT NULL DEFAULT '0' AFTER `closedby`,
					ADD `staffreplies` SMALLINT( 5 ) UNSIGNED NOT NULL DEFAULT '0' AFTER `replies`,
					ADD INDEX ( `openedby` , `firstreplyby` , `closedby` ),
					ADD INDEX(`dt`)";

		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users`
					CHANGE `signature` `signature` VARCHAR( 1000 ) NOT NULL DEFAULT '',
					CHANGE `heskprivileges` `heskprivileges` VARCHAR(1000) CHARACTER SET utf8 COLLATE utf8_unicode_ci NULL DEFAULT NULL,
					CHANGE `categories` `categories` VARCHAR(500) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
					ADD `notify_customer_new` ENUM('0','1') NOT NULL DEFAULT '1' AFTER `autostart`,
					ADD `notify_customer_reply` ENUM('0','1') NOT NULL DEFAULT '1'  AFTER `notify_customer_new`,
					ADD `show_suggested` ENUM('0','1') NOT NULL DEFAULT '1'  AFTER `notify_customer_reply`";

		foreach ($sql as $s)
	    {
			hesk_dbQuery($s);
	    }

		// ==> Populate new fields where available

		// Get list of valid ticket categories
		$cat = array();
		$res = hesk_dbQuery("SELECT `id` FROM `".hesk_dbEscape($hesk_settings['db_pfix'])."categories`");
		while ($row=hesk_dbFetchAssoc($res))
		{
			$cat[]=$row['id'];
		}


		// Update tickets
		$res = hesk_dbQuery("SELECT `id`, `category` FROM `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets`");
		while ($ticket = hesk_dbFetchAssoc($res) )
		{
			$sql = array();

			// Verify that the category is valid
			if ( ! in_array($ticket['category'], $cat) )
			{
				$sql[] = " `category`=1 ";
			}


			// Update number of staff replies
			$res2 = hesk_dbQuery("SELECT COUNT(*) as `cnt`, (CASE WHEN `staffid` = 0 THEN 0 ELSE 1 END) AS `staffcnt` FROM `".hesk_dbEscape($hesk_settings['db_pfix'])."replies` WHERE `replyto`=".intval($ticket['id'])." GROUP BY `staffcnt`");

			$total			= 0;
			$staffreplies	= 0;

			while ( $row = hesk_dbFetchAssoc($res2) )
			{
				$total += $row['cnt'];
				$staffreplies += ($row['staffcnt'] ? $row['cnt'] : 0);
			}

			if ( $total > 0 )
			{
				$sql[] = " `replies`={$total}, `staffreplies`={$staffreplies} ";
			}

			// If we have staff replies, find the first one
			if ( $staffreplies > 0 )
			{
				$res2 = hesk_dbQuery("SELECT `dt`, `staffid` FROM `".hesk_dbEscape($hesk_settings['db_pfix'])."replies` WHERE `replyto`={$ticket['id']} AND `staffid`>0 ORDER BY `id` ASC LIMIT 1");

				if ( hesk_dbNumRows($res2) == 1)
				{
					$reply = hesk_dbFetchAssoc($res2);
					$sql[] = " `firstreply`='".hesk_dbEscape($reply['dt'])."', `firstreplyby`={$reply['staffid']} ";
				}
			}

			// Do we need to update the ticket?
			if ( count($sql) )
			{
				hesk_dbQuery("UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` SET " . implode(',', $sql) . ", `lastchange`=`lastchange` WHERE `id`={$ticket['id']}");
			}
		}

		$update_all_next = 1;
	} // END version 2.5.x to 2.6.0

	// 2.6.1 no changes

	// 2.6.2 change `closedby` type for all 2.6.x to be sure
	if ($hesk_settings['update_from'] == '2.6')
	{
		hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` CHANGE `closedby` `closedby` MEDIUMINT(8) NULL DEFAULT NULL");
	}

	// 2.6.3 no changes
	// 2.6.4 no changes
	// 2.6.5 no changes
	// 2.6.6 no changes
	// 2.6.7 no changes

	// Updating version 2.6 to 2.7
	if ($update_all_next || $hesk_settings['update_from'] == '2.6')
	{
        // Delete old export folder
        $export_dir = HESK_PATH.$hesk_settings['attach_dir'].'/export/';
        if (is_dir($export_dir))
        {
            $files = glob($export_dir.'*', GLOB_NOSORT);
            if (is_array($files))
            {
                array_walk($files, 'hesk_unlink_callable');
            }
            @rmdir($export_dir);
        }

        // Delete old __latest.txt file
        hesk_unlink(HESK_PATH.$hesk_settings['attach_dir'].'/__latest.txt');

        // Delete HTMLPurifier cache
        if (is_dir(HESK_PATH.'inc/htmlpurifier/standalone/HTMLPurifier/DefinitionCache/Serializer'))
        {
            hesk_rrmdir(HESK_PATH.'inc/htmlpurifier/standalone/HTMLPurifier/DefinitionCache/Serializer', true);
        }

		$sql = array();

		$sql[] = "ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` ADD `autoreload` SMALLINT UNSIGNED NOT NULL DEFAULT '0' AFTER `autostart`";

		foreach ($sql as $s)
		{
			hesk_dbQuery($s);
		}

		// Add new custom field columns and make sure all are set to mediumtext
		$sql = array();
		$table = array();

		// Is the status column an enum type? (HESK < 2.7.0) If no, don't subtract 1 later on
		$res = hesk_dbQuery("SELECT DATA_TYPE FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = '".hesk_dbEscape($hesk_settings['db_name'])."' AND TABLE_NAME = '".hesk_dbEscape($hesk_settings['db_pfix'])."tickets' AND COLUMN_NAME = 'status'");
		$adjust_status_column = false;
		if (hesk_dbResult($res) == 'enum') {
			$adjust_status_column = true;
		}
		// Change the type regardless
		$sql[] = "CHANGE `status` `status` TINYINT UNSIGNED NOT NULL DEFAULT '0'";

		$res = hesk_dbQuery("DESCRIBE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets`");
		while($row = hesk_dbFetchAssoc($res))
		{
			$table[$row['Field']] = $row['Type'];
		}

		for ($i=1; $i<=50; $i++)
		{
			if (isset($table['custom'.$i]))
			{
                if (strtolower($table['custom'.$i]) != 'mediumtext')
                {
		            $sql[] = 'CHANGE `custom'.$i.'` `custom'.$i.'` MEDIUMTEXT CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL';
                }
			}
			else
			{
		    	$sql[] = 'ADD `custom'.$i.'` MEDIUMTEXT CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL';
			}
		}

		hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` " . implode(',', $sql));

		// A tweak to fix converting enum to int
		if ($adjust_status_column) {
			hesk_dbQuery("UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` SET `status`=`status`-1, `lastchange`=`lastchange`");
		}

		// -> Custom fields
		hesk_dbQuery("
		CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."custom_fields` (
		  `id` tinyint(3) UNSIGNED NOT NULL,
		  `use` enum('0','1','2') NOT NULL DEFAULT '0',
		  `place` enum('0','1') NOT NULL DEFAULT '0',
		  `type` varchar(20) NOT NULL DEFAULT 'text',
		  `req` enum('0','1','2') NOT NULL DEFAULT '0',
		  `category` text,
		  `name` text,
		  `value` text,
		  `order` smallint(5) UNSIGNED NOT NULL DEFAULT '10',
		  PRIMARY KEY (`id`),
		  KEY `useType` (`use`,`type`)
		) ENGINE=MyISAM  DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
		");

		// ---> Insert empty custom fields
		hesk_dbQuery("
		INSERT INTO `".hesk_dbEscape($hesk_settings['db_pfix'])."custom_fields` (`id`, `use`, `place`, `type`, `req`, `category`, `name`, `value`, `order`) VALUES
		(1, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(2, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(3, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(4, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(5, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(6, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(7, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(8, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(9, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(10, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(11, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(12, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(13, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(14, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(15, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(16, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(17, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(18, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(19, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(20, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(21, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(22, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(23, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(24, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(25, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(26, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(27, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(28, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(29, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(30, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(31, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(32, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(33, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(34, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(35, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(36, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(37, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(38, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(39, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(40, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(41, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(42, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(43, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(44, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(45, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(46, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(47, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(48, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(49, '0', '0', 'text', '0', NULL, '', NULL, 1000),
		(50, '0', '0', 'text', '0', NULL, '', NULL, 1000)
		");

		// ---> Update custom fields with current values
		if (isset($hesk_settings['custom_fields']))
		{
			foreach ($hesk_settings['custom_fields'] as $k => $v)
			{
				if ( ! $v['use'])
				{
			    	continue;
				}

				$cf = array();

				// ID
				$id = intval(str_replace('custom', '', $k));

				// Name
				$cf['names'][$hesk_settings['language']] = $v['name'];
				$cf['names'] = addslashes(json_encode($cf['names']));

				// Type and value
				$cf['type'] = $v['type'];
				switch ($cf['type'])
				{
					case 'textarea':
						$size = explode('#',$v['value']);
						$cf['rows'] = empty($size[0]) ? 5 : intval($size[0]);
						$cf['cols'] = empty($size[1]) ? 30 : intval($size[1]);
						$cf['value'] = array('rows' => $cf['rows'], 'cols' => $cf['cols']);
						break;

					case 'radio':
						$options = explode('#HESK#',$v['value']);
						$cf['value'] = array('radio_options' => $options);
						break;

					case 'select':
						$v['value'] = str_replace('{HESK_SELECT}', '', $v['value'], $num);
						$options = explode('#HESK#',$v['value']);
						$cf['value'] = array('show_select' => ($num ? 1 : 0), 'select_options' => $options);
						break;

					case 'checkbox':
						$options = explode('#HESK#',$v['value']);
						$cf['value'] = array('checkbox_options' => $options);
						break;

					default:
						$cf['type'] = 'text';
						$cf['max_length'] = intval($v['maxlen']);
						$cf['default_value'] = $v['value'];
						$cf['value'] = array('max_length' => $cf['max_length'], 'default_value' => $cf['default_value']);
				}

				$cf['value'] = addslashes(json_encode($cf['value']));

				// Update custom_fields table with this field settings
				hesk_dbQuery("UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."custom_fields` SET
				`use`      = '1',
				`place`    = '".($v['place'] ? '1' : '0')."',
				`type`     = '{$cf['type']}',
				`req`      = '".($v['req'] ? '1' : '0')."',
				`name`     = '".hesk_dbEscape($cf['names'])."',
				`value`    = ".(strlen($cf['value']) ? "'".hesk_dbEscape($cf['value'])."'" : 'NULL')."
				WHERE `id`={$id}");
			}
		}

		// -> Custom statuses
		hesk_dbQuery("
		CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."custom_statuses` (
		`id` tinyint(3) UNSIGNED NOT NULL,
		`name` text NOT NULL,
		`color` varchar(6) NOT NULL,
		`can_customers_change` enum('0','1') NOT NULL DEFAULT '1',
		`order` smallint(5) UNSIGNED NOT NULL DEFAULT '10',
		PRIMARY KEY (`id`)
		) ENGINE=MyISAM  DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
		");

		// Update staff with new permissions (allowed by default)
		hesk_dbQuery("UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` SET `heskprivileges`=CONCAT(`heskprivileges`,',can_resolve,can_submit_any_cat') WHERE `isadmin` = '0' AND `heskprivileges` LIKE '%can_reply_tickets%' ");

		$update_all_next = 1;
	} // END version 2.6 to 2.7

	// Updating version 2.7 to 2.8
	if ($update_all_next || $hesk_settings['update_from'] == '2.7')
	{
    	// Modify tickets table
		hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` ADD `assignedby` MEDIUMINT NULL DEFAULT NULL AFTER `owner`, ADD INDEX (`assignedby`)");

		$update_all_next = 1;
    } // END version 2.7 to 2.8

    // Updating 2.8 to 2.8.2
    if ($update_all_next || $hesk_settings['update_from'] == '2.8')
    {
        // Modify service_messages table
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."service_messages` ADD `language` VARCHAR(50) NULL DEFAULT NULL AFTER `message`");

        $update_all_next = 1;
    } // END version 2.8 to 2.8.2

    // Updating 2.8.2 to 2.8.3
    if ($update_all_next || $hesk_settings['update_from'] == '2.8.2')
    {
        // Modify tickets table
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` CHANGE `name` `name` VARCHAR(255) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL DEFAULT '', CHANGE `subject` `subject` VARCHAR(255) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL DEFAULT ''");

        $update_all_next = 1;
    } // END version 2.8.2 to 2.8.3

    // 2.8.4 no changes
    // 2.8.5 no changes
    // 3.0.0 no changes
    // 3.0.1 no changes
    // 3.0.2 no changes
    // 3.0.3 no changes
    // 3.1.0 no changes
    // 3.1.1 no changes
    // 3.1.2 no changes

    // Updating 2.8.3 through 3.1.1 to 3.2.0
    if ($update_all_next || $hesk_settings['update_from'] == '2.8.3') {
        // Modify tickets table with due date-related fields only if it doesn't exist (MfH users will already have these columns)
        $existing_column_rs = hesk_dbQuery("SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS
            WHERE table_name = '".hesk_dbEscape($hesk_settings['db_pfix'])."tickets'
            AND table_schema = '".hesk_dbEscape($hesk_settings['db_name'])."'
            AND column_name = 'due_date'");

        if (hesk_dbNumRows($existing_column_rs) === 0) {
            hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` ADD COLUMN `message_html` mediumtext DEFAULT NULL AFTER `message`, ADD COLUMN `due_date` timestamp NULL DEFAULT NULL, ADD COLUMN `overdue_email_sent` tinyint(1) DEFAULT '0'");
            hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` ADD COLUMN `notify_overdue_unassigned` enum('0','1') COLLATE utf8_unicode_ci NOT NULL DEFAULT '1' AFTER `notify_note`");
            hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` ADD COLUMN `notify_overdue_my` enum('0','1') COLLATE utf8_unicode_ci NOT NULL DEFAULT '1' AFTER `notify_overdue_unassigned`");
        } else {
            hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` ADD COLUMN `message_html` mediumtext DEFAULT NULL AFTER `message`");
        }

        hesk_dbQuery("UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` SET `message_html` = `message`, `lastchange`=`lastchange`");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."replies` CHANGE `name` `name` varchar(255) COLLATE utf8_unicode_ci NOT NULL DEFAULT '', ADD COLUMN `message_html` mediumtext DEFAULT NULL AFTER `message`");
        hesk_dbQuery("UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."replies` SET `message_html` = `message`");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."reply_drafts` ADD COLUMN `message_html` mediumtext COLLATE utf8_unicode_ci NULL AFTER `message`");
        hesk_dbQuery("UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."reply_drafts` SET `message_html` = `message`");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."std_replies` ADD COLUMN `message_html` mediumtext COLLATE utf8_unicode_ci NULL AFTER `message`");
        hesk_dbQuery("UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."std_replies` SET `message_html` = `message`");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."ticket_templates` ADD COLUMN `message_html` mediumtext COLLATE utf8_unicode_ci NULL AFTER `message`");
        hesk_dbQuery("UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."ticket_templates` SET `message_html` = `message`");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` CHANGE `name` `name` varchar(255) COLLATE utf8_unicode_ci NOT NULL DEFAULT ''");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."categories` CHANGE `name` `name` varchar(255) COLLATE utf8_unicode_ci NOT NULL DEFAULT ''");

        // -> Log of overdue tickets
        hesk_dbQuery("
        CREATE TABLE IF NOT EXISTS `".hesk_dbEscape($hesk_settings['db_pfix'])."log_overdue` (
          `id` int(10) UNSIGNED NOT NULL AUTO_INCREMENT,
          `dt` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
          `ticket` mediumint(8) UNSIGNED NOT NULL,
          `category` smallint(5) UNSIGNED NOT NULL,
          `priority` enum('0','1','2','3') NOT NULL,
          `status` tinyint(3) UNSIGNED NOT NULL,
          `owner` smallint(5) UNSIGNED NOT NULL DEFAULT '0',
          `due_date` timestamp NOT NULL DEFAULT '2000-01-01 00:00:00',
          `comments` varchar(255) DEFAULT NULL,
          PRIMARY KEY (`id`),
          KEY `ticket` (`ticket`),
          KEY `category` (`category`),
          KEY `priority` (`priority`),
          KEY `status` (`status`),
          KEY `owner` (`owner`)
        ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
        ");

        $update_all_next = 1;
    }

    // Updating 3.2.0 and 3.2.1 to 3.2.2
    if ($update_all_next || $hesk_settings['update_from'] == '3.2.0') {
        // Fix any missing HTML messages from merged tickets
        hesk_dbQuery("UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."replies` SET `message_html` = `message` WHERE `message_html` IS NULL");
        $update_all_next = 1;
    }

    // 3.2.3 no changes
    // 3.2.4 no changes
    // 3.2.5 no changes

    // Updating 3.2.x to 3.3.0
    if ($update_all_next || $hesk_settings['update_from'] == '3.2.0') {
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users`
                    CHANGE `user` `user` VARCHAR(255) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
                    CHANGE `pass` `pass` VARCHAR(255) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL DEFAULT ''
        ");

        // -> Authentication tokens
        hesk_dbQuery("
        CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."auth_tokens` (
          `id` int(11) UNSIGNED NOT NULL AUTO_INCREMENT,
          `selector` char(12) DEFAULT NULL,
          `token` char(64) DEFAULT NULL,
          `user_id` smallint(5) UNSIGNED NOT NULL,
          `created` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
          `expires` timestamp NULL DEFAULT NULL,
          PRIMARY KEY (`id`)
        ) ENGINE=MyISAM DEFAULT CHARSET=utf8;
        ");

        // Category-default due dates
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."categories`
                    ADD `autoassign_config` varchar(1000) COLLATE utf8_unicode_ci DEFAULT NULL AFTER `autoassign`,
                    ADD `default_due_date_amount` int(11) DEFAULT NULL AFTER `priority`,
                    ADD `default_due_date_unit` varchar(10) COLLATE utf8_unicode_ci DEFAULT NULL AFTER `default_due_date_amount`
        ");

        // MFA
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users`
                    ADD `mfa_enrollment` smallint(5) UNSIGNED NOT NULL DEFAULT 0 AFTER `replies`,
                    ADD `mfa_secret` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL AFTER `mfa_enrollment`
        ");
        hesk_dbQuery("
        CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."mfa_verification_tokens` (
          `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
          `user_id` smallint(5) UNSIGNED NOT NULL,
          `verification_token` varchar(255) NOT NULL,
          `expires_at` timestamp NOT NULL DEFAULT '2000-01-01 00:00:00',
          PRIMARY KEY (`id`),
          KEY `user_id` (`user_id`),
          KEY `verification_token` (`verification_token`)
        ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
        ");
        hesk_dbQuery("
        CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."mfa_backup_codes` (
          `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
          `dt` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
          `user_id` smallint(5) UNSIGNED NOT NULL,
          `code` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
          PRIMARY KEY (`id`)
        ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
        ");

        // Add id columns
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."logins` ADD `id` INT UNSIGNED NOT NULL AUTO_INCREMENT FIRST, ADD PRIMARY KEY (`id`)");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."online` ADD `id` INT UNSIGNED NOT NULL AUTO_INCREMENT FIRST, ADD PRIMARY KEY (`id`)");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."pipe_loops` ADD `id` INT UNSIGNED NOT NULL AUTO_INCREMENT FIRST, ADD PRIMARY KEY (`id`)");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."reply_drafts` ADD `id` INT UNSIGNED NOT NULL AUTO_INCREMENT FIRST, ADD PRIMARY KEY (`id`)");

        // Ticket satisfaction - two steps, to ignore all existing tickets
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets`
                    ADD `satisfaction_email_sent` TINYINT(1) DEFAULT '1' AFTER `overdue_email_sent`,
                    ADD `satisfaction_email_dt` TIMESTAMP NULL DEFAULT NULL AFTER `satisfaction_email_sent`
        ");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` CHANGE `satisfaction_email_sent` `satisfaction_email_sent` TINYINT(1) DEFAULT '0'");

        // -> Temporary Attachments (Drag & Drop)
        hesk_dbQuery("
        CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."temp_attachments` (
            `att_id` mediumint(8) unsigned NOT NULL AUTO_INCREMENT,
            `unique_id` varchar(255) COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
            `saved_name` varchar(255) COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
            `real_name` varchar(255) COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
            `size` int(10) unsigned NOT NULL DEFAULT '0',
            `expires_at` timestamp NOT NULL,
            PRIMARY KEY (`att_id`)
        ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
        ");
        hesk_dbQuery("
        CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."temp_attachments_limits` (
            `ip` varchar(45) COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
            `upload_count` int(10) unsigned NOT NULL DEFAULT 1,
            `last_upload_at` timestamp NOT NULL DEFAULT NOW(),
            PRIMARY KEY (`ip`)
        ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
        ");

        $update_all_next = 1;
    }

    // copy new_ticket.txt into new_ticket_by_staff.txt
    $eml_fp = HESK_PATH . 'language/' . $hesk_settings['languages'][$hesk_settings['language']]['folder'] . '/emails/';
    if (file_exists($eml_fp . 'new_ticket.txt') &&
        file_exists($eml_fp . 'new_ticket_by_staff.txt') &&
        is_writable($eml_fp . 'new_ticket_by_staff.txt')
    ) {
        $eml = file_get_contents($eml_fp . 'new_ticket.txt');
        file_put_contents($eml_fp . 'new_ticket_by_staff.txt', $eml);
    }

    // 3.3.1 no changes
    // 3.3.2 no changes

    // Updating 3.3.x to 3.4.0
    if ($update_all_next || $hesk_settings['update_from'] == '3.3.0') {
        // -> OAuth tokens
        hesk_dbQuery("
        CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."oauth_providers` (
          `id` int(11) UNSIGNED NOT NULL AUTO_INCREMENT,
          `name` varchar(255) NOT NULL,
          `authorization_url` text NOT NULL,
          `token_url` text NOT NULL,
          `client_id` text NOT NULL,
          `client_secret` text NOT NULL,
          `scope` text NOT NULL,
          `no_val_ssl` tinyint(4) NOT NULL DEFAULT '0',
          `verified` smallint NOT NULL DEFAULT 0,
          PRIMARY KEY (`id`)
        ) ENGINE=MyISAM DEFAULT CHARSET=utf8;
        ");
        hesk_dbQuery("
        CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."oauth_tokens` (
          `id` int(11) UNSIGNED NOT NULL AUTO_INCREMENT,
          `provider_id` int(11) NOT NULL,
          `token_value` text DEFAULT NULL,
          `token_type` varchar(32) NOT NULL,
          `created` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
          `expires` timestamp NULL DEFAULT NULL,
          PRIMARY KEY (`id`)
        ) ENGINE=MyISAM DEFAULT CHARSET=utf8;
        ");

        // Add the new 'can_due_date' permission to existing users who had that permission
        hesk_dbQuery("UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."users` SET `heskprivileges`=CONCAT(`heskprivileges`,',can_due_date') WHERE `isadmin` = '0' AND `heskprivileges` REGEXP 'can_reply_tickets|can_edit_tickets' ");

        $update_all_next = 1;
    }

    // 3.4.1 no changes
    // 3.4.2 no changes
    // 3.4.3 no changes
    // 3.4.4 no changes
    // 3.4.5 no changes
    // 3.4.6 no changes

    // Updating 3.4.x to 3.5.0
    if ($update_all_next || $hesk_settings['update_from'] == '3.4.0') {
        // -> Customer Accounts
        hesk_dbQuery("
        CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."customers` (
          `id` mediumint(8) unsigned NOT NULL AUTO_INCREMENT,
          `pass` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
          `name` varchar(255) COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
          `email` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
          `language` varchar(50) COLLATE utf8_unicode_ci DEFAULT NULL,
          `verified` smallint(1) UNSIGNED NOT NULL DEFAULT 0,
          `verification_token` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
          `verification_email_sent_at` timestamp NULL,
          `mfa_enrollment` smallint(5) UNSIGNED NOT NULL DEFAULT 0,
          `mfa_secret` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
          PRIMARY KEY (`id`),
          KEY `email` (`email`)
        ) ENGINE=MyISAM  DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
        ");
        hesk_dbQuery("
        CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."pending_customer_email_changes` (
          `id` mediumint(8) unsigned NOT NULL AUTO_INCREMENT,
          `customer_id` mediumint(8) unsigned NOT NULL,
          `new_email` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
          `verification_token` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
          `expires_at` timestamp NOT NULL DEFAULT '2000-01-01 00:00:00',
          PRIMARY KEY (`id`),
          KEY `email` (`new_email`)
        ) ENGINE=MyISAM  DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
        ");
        hesk_dbQuery("
        CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."ticket_to_customer` (
          `id` mediumint(8) unsigned NOT NULL AUTO_INCREMENT,
          `ticket_id` mediumint(8) unsigned NOT NULL,
          `customer_id` mediumint(8) unsigned NOT NULL,
          `customer_type` varchar(9) COLLATE utf8_unicode_ci NOT NULL DEFAULT 'REQUESTER',
          PRIMARY KEY (`id`),
          KEY `ticket_id` (`ticket_id`),
          KEY `customer_id` (`customer_id`)
        ) ENGINE=MyISAM  DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
        ");
        // -> Bookmarks
        hesk_dbQuery("
        CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."bookmarks` (
          `id` mediumint(8) unsigned NOT NULL AUTO_INCREMENT,
          `user_id` smallint(5) unsigned NOT NULL,
          `ticket_id` mediumint(8) unsigned NOT NULL,
          PRIMARY KEY (`id`),
          KEY `ticket_id` (`ticket_id`,`user_id`),
          KEY `user_id` (`user_id`,`ticket_id`)
        ) ENGINE=MyISAM DEFAULT CHARSET=utf8;
        ");

        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets`
                    ADD `eid` varchar(1000) NULL DEFAULT NULL AFTER `satisfaction_email_dt`,
                    CHANGE `name` `u_name` varchar(255) NOT NULL default '',
                    CHANGE `email` `u_email` varchar(1000) NOT NULL default ''");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."replies`
                    ADD `customer_id` mediumint(8) unsigned NULL DEFAULT NULL AFTER `staffid`,
                    ADD `eid` varchar(1000) NULL DEFAULT NULL AFTER `read`;");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."reset_password`
                    ADD `user_type` varchar(8) NOT NULL DEFAULT 'STAFF' AFTER `dt`");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."mfa_verification_tokens`
                    ADD `user_type` varchar(8) NOT NULL DEFAULT 'STAFF' AFTER `user_id`");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."mfa_backup_codes`
                    ADD `user_type` varchar(8) NOT NULL DEFAULT 'STAFF' AFTER `user_id`");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."auth_tokens`
                    ADD `user_type` varchar(8) NOT NULL DEFAULT 'STAFF' AFTER `user_id`");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."service_messages`
                    ADD `location` varchar(255) NULL DEFAULT NULL AFTER `order`");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users`
                    ADD `notify_customer_approval` ENUM('0','1') NOT NULL DEFAULT '0' AFTER `notify_overdue_my`,
                    CHANGE `default_list` `default_list` VARCHAR(1000) NOT NULL DEFAULT ''");
        hesk_dbQuery("
        CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."pipe_rejections` (
          `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
          `timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
          `email` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
          PRIMARY KEY (`id`),
          KEY `email` (`email`)
        ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
        ");

        // Increase custom fields to 100; try preserving current custom fields
        $sql = array();
        $sql_custom = array();
        $res = hesk_dbQuery("DESCRIBE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets`");
        while($row = hesk_dbFetchAssoc($res)) {
            $table[$row['Field']] = $row['Type'];
        }
        for ($i=51; $i<=100; $i++) {
            if (isset($table['custom'.$i])) {
                if (strtolower($table['custom'.$i]) != 'mediumtext') {
                    $sql[] = 'CHANGE `custom'.$i.'` `custom'.$i.'` MEDIUMTEXT CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL';
                }
            } else {
                $sql[] = 'ADD `custom'.$i.'` MEDIUMTEXT CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL';
                $sql_custom[] = "({$i}, '0', '0', 'text', '0', NULL, '', NULL, 1000)";
            }
        }
        if (count($sql)) {
            hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` " . implode(',', $sql));
        }
        if (count($sql_custom)) {
            hesk_dbQuery("INSERT INTO `".hesk_dbEscape($hesk_settings['db_pfix'])."custom_fields` (`id`, `use`, `place`, `type`, `req`, `category`, `name`, `value`, `order`) VALUES ".implode(',', $sql_custom)."");
        }

        $update_all_next = 1;
    }

    // 3.5.1 no changes

    // Updating 3.5.x to 3.5.2
    if ($update_all_next || $hesk_settings['update_from'] == '3.5.0') {
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."replies` CHANGE `eid` `eid` VARCHAR(1000) NULL DEFAULT NULL, ADD KEY `customer_id` (`customer_id`)");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` CHANGE `eid` `eid` VARCHAR(1000) NULL DEFAULT NULL");

        $update_all_next = 1;
    }

    // 3.5.3 no changes

    // Updating 3.5.3 to 3.6.0
    if ($update_all_next || $hesk_settings['update_from'] == '3.5.2') {
        hesk_dbQuery("
        CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."ticket_to_collaborator` (
          `id` int UNSIGNED NOT NULL AUTO_INCREMENT,
          `ticket_id` mediumint UNSIGNED NOT NULL,
          `user_id` smallint UNSIGNED NOT NULL,
          PRIMARY KEY (`id`),
          KEY `ticket_id` (`ticket_id`),
          KEY `user_id` (`user_id`)
        ) ENGINE=MyISAM DEFAULT CHARSET=utf8;
        ");

        hesk_dbQuery("
        ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."users`
        ADD `notify_collaborator_added` ENUM('0','1') COLLATE utf8mb3_unicode_ci NOT NULL DEFAULT '1' AFTER `notify_customer_approval`,
        ADD `notify_collaborator_customer_reply` ENUM('0','1') COLLATE utf8mb3_unicode_ci NOT NULL DEFAULT '1' AFTER `notify_collaborator_added`,
        ADD `notify_collaborator_staff_reply` ENUM('0','1') COLLATE utf8mb3_unicode_ci NOT NULL DEFAULT '0' AFTER `notify_collaborator_customer_reply`,
        ADD `notify_collaborator_note` ENUM('0','1') COLLATE utf8mb3_unicode_ci NOT NULL DEFAULT '1' AFTER `notify_collaborator_staff_reply`,
        ADD `notify_collaborator_resolved` ENUM('0','1') COLLATE utf8mb3_unicode_ci NOT NULL DEFAULT '0' AFTER `notify_collaborator_note`,
        ADD `notify_collaborator_overdue` ENUM('0','1') COLLATE utf8mb3_unicode_ci NOT NULL DEFAULT '1' AFTER `notify_collaborator_resolved`
        ");

        // -> Linked Tickets Table
        hesk_dbQuery("
        CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."linked_tickets` (
          `id` mediumint(8) NOT NULL AUTO_INCREMENT,
          `ticket_id1` mediumint(8) NOT NULL,
          `ticket_id2` mediumint(8) NOT NULL,
          `dt_created` datetime NOT NULL,
          PRIMARY KEY (`id`),
          KEY `ticket_id1` (`ticket_id1`),
          KEY `ticket_id2` (`ticket_id2`)
        ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
        ");

        // -> Custom Priorities
        hesk_dbQuery("
        CREATE TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."custom_priorities` (
          `id` tinyint(3) UNSIGNED NOT NULL,
          `name` text NOT NULL,
          `color` varchar(6) NOT NULL,
          `can_customers_select` enum('0','1') NOT NULL DEFAULT '1',
          `priority_order` smallint(5) UNSIGNED NOT NULL DEFAULT '10',
          PRIMARY KEY (`id`)
        ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
        ");

        hesk_dbQuery("
        INSERT INTO `".hesk_dbEscape($hesk_settings['db_pfix'])."custom_priorities` (`id`, `name`, `color`, `can_customers_select`, `priority_order`) VALUES
        (0, '{\"English\":\"NULL\"}', 'e74441', '0', 4),
        (1, '{\"English\":\"NULL\"}', 'fac500', '1', 3),
        (2, '{\"English\":\"NULL\"}', '3abb7a', '1', 2),
        (3, '{\"English\":\"NULL\"}', '71a5ec', '1', 1)
        ");

        //Change categories table priority column datatype
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."categories` ADD COLUMN `old_priority` tinyint(3)");
        hesk_dbQuery("UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."categories`
            SET `old_priority` =
                CASE `priority`
                    WHEN '0' THEN 0
                    WHEN '1' THEN 1
                    WHEN '2' THEN 2
                    WHEN '3' THEN 3
                END
        ");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."categories` DROP COLUMN `priority`");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."categories` CHANGE  `old_priority` `priority` tinyint(3)");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."categories` MODIFY `priority` tinyint(3) UNSIGNED NOT NULL DEFAULT '3' AFTER `type`");

        //Change tickets table priority column datatype
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` ADD COLUMN `old_priority` tinyint(3)");
        hesk_dbQuery("UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets`
            SET `old_priority` =
                CASE `priority`
                    WHEN '0' THEN 0
                    WHEN '1' THEN 1
                    WHEN '2' THEN 2
                    WHEN '3' THEN 3
                END,
            `lastchange`=`lastchange`
        ");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` DROP COLUMN `priority`");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` CHANGE  `old_priority` `priority` tinyint(3)");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` MODIFY `priority` tinyint(3) UNSIGNED NOT NULL DEFAULT '3' AFTER `category`");

        //Change log_overdue table priority column datatype
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."log_overdue` ADD COLUMN `old_priority` tinyint(3)");
        hesk_dbQuery("UPDATE `".hesk_dbEscape($hesk_settings['db_pfix'])."log_overdue`
            SET `old_priority` =
                CASE `priority`
                    WHEN '0' THEN 0
                    WHEN '1' THEN 1
                    WHEN '2' THEN 2
                    WHEN '3' THEN 3
                END
        ");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."log_overdue` DROP INDEX `priority`");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."log_overdue` DROP COLUMN `priority`");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."log_overdue` CHANGE  `old_priority` `priority` tinyint(3)");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."log_overdue` MODIFY `priority` tinyint(3) UNSIGNED NOT NULL AFTER `category`");
        hesk_dbQuery("ALTER TABLE `".hesk_dbEscape($hesk_settings['db_pfix'])."log_overdue` ADD INDEX(`priority`)");

        $update_all_next = 1;
    }

    // 3.6.1 no changes
    // 3.6.2 no changes
    // 3.6.3 no changes

	// Insert the "HESK updated to latest version" mail for the administrator
    $offer_license = file_exists(HESK_PATH.'hesk_license.php') ? "" : "<h3>&raquo; Look professional</h3>\r\n\r\n<p><a href=\"https://www.hesk.com/get/hesk3-license\">Remove &quot;Powered by&quot; links</a> to support Hesk development and make it look more professional.</p>\r\n\r\n";
    hesk_dbQuery("INSERT INTO `".hesk_dbEscape($hesk_settings['db_pfix'])."mail` (`id`, `from`, `to`, `subject`, `message`, `dt`, `read`, `deletedby`) VALUES (NULL, 9999, 1, 'Hesk updated to version ".HESK_NEW_VERSION."', '".hesk_dbEscape("</p><div style=\"text-align:justify; padding-left: 10px; padding-right: 10px;\">\r\n\r\n<h2 style=\"padding-left:0px\">Congratulations, your Hesk has been successfully updated! Now is your chance to:</h2>\r\n\r\n<h3>&raquo; Rate us</h3>\r\n\r\n<p>Positive ratings and reviews motivate us to continue developing Hesk. Please take a moment to:</p>\r\n\r\n<ul>\r\n<li>rate or review Hesk at <a href=\"https://softaculous.com/rate/HESK\" rel=\"nofollow\">Softaculous</a></li>\r\n<li>rate or review Hesk at <a href=\"https://alternativeto.net/software/hesk/about/\" rel=\"nofollow\">AlternativeTo</a></li>\r\n</ul>\r\n\r\n<h3>&raquo; Stay updated</h3>\r\n\r\n<p>Hesk regularly receives improvements and bug fixes; make sure you know about them!</p>\r\n<ul>\r\n<li>for fast notifications, <a href=\"https://x.com/HESKdotCOM\" rel=\"nofollow\">follow Hesk on <b>X</b></a></li>\r\n<li>for email notifications, subscribe to our low-volume, zero-spam <a href=\"https://www.hesk.com/newsletter.php\">newsletter</a></li>\r\n</ul>\r\n\r\n<h3>&raquo; Look professional</h3>\r\n\r\n<p><a href=\"https://www.hesk.com/get/hesk3-license\">Remove &quot;Powered by&quot; links</a> to support Hesk development and make it look more professional.</p>\r\n\r\n&nbsp;\r\n\r\n<h3>&raquo; Tired of manual updates? Upgrade to Hesk Cloud!</h3>\r\n\r\n<p>Experience the best of Hesk by moving your help desk into the Hesk Cloud:</p>\r\n<ul>\r\n<li>exclusive advanced modules,</li>\r\n<li>automated updates,</li>\r\n<li>free migration of your existing Hesk tickets and settings,</li>\r\n<li>we take care of maintenance, server setup and optimization, backups, and more!</li>\r\n</ul>\r\n\r\n<p>&nbsp;<br><a href=\"https://www.hesk.com/get/hesk3-cloud\" class=\"btn btn--blue-border\" style=\"text-decoration:none\">Click here to learn more about Hesk Cloud</a></p>\r\n\r\n<p>&nbsp;</p>\r\n\r\n<p>Best regards,</p>\r\n\r\n<p>Klemen Stirn<br>\r\nFounder<br>\r\n<a href=\"https://www.hesk.com\">https://www.hesk.com</a></p>\r\n\r\n<p>&nbsp;</p>\r\n\r\n</div><p>")."', NOW(), '0', 9999)");

	return true;

} // End hesk_iUpdateTables()


function hesk_iSaveSettings()
{
    global $hesk_settings, $hesklang;

    // Get default settings
	$hesk_default = hesk_defaultSettings();

    // Set a new version number
    $hesk_settings['hesk_version'] = HESK_NEW_VERSION;

	// Correct typos in variable names before 2.4
	if ( isset($hesk_settings['stmp_host_port']) )
	{
		$hesk_settings['smtp_host_port'] = isset($hesk_settings['stmp_host_port']) ? $hesk_settings['stmp_host_port'] : 25;
		$hesk_settings['smtp_timeout']   = isset($hesk_settings['stmp_timeout']) ? $hesk_settings['stmp_timeout'] : 10;
		$hesk_settings['smtp_user']      = isset($hesk_settings['stmp_user']) ? $hesk_settings['stmp_user'] : '';
		$hesk_settings['smtp_password']  = isset($hesk_settings['stmp_password']) ? $hesk_settings['stmp_password'] : '';
	}

    // Try to convert Hesk < 3.3.0 timestamp to 3.3.0 format
    if (isset($hesk_settings['timeformat'])) {
        $hesk_settings['format_timestamp'] = $hesk_settings['timeformat'];
        if ( ! isset($hesk_settings['format_time']) && isset($hesk_settings['timeformat']) && substr_count($hesk_settings['timeformat'], ' ') === 1) {
            list($hesk_settings['format_date'], $hesk_settings['format_time']) = explode(' ', $hesk_settings['timeformat']);
        }
    }

    // Convert Hesk < 3.3.2 settings
    if ( ! isset($hesk_settings['smtp_enc'])) {
        if ($hesk_settings['smtp_tls']) {
            $hesk_settings['smtp_enc'] = 'tls';
        } elseif ($hesk_settings['smtp_ssl'] || stripos($hesk_settings['smtp_host_name'], 'ssl://') === 0) {
            $hesk_settings['smtp_enc'] = 'ssl';
        } else {
            $hesk_settings['smtp_enc'] = '';
        }
    }

    // Fix wrongly saved host name
    if (stripos($hesk_settings['smtp_host_name'], 'ssl://') === 0) {
        $hesk_settings['smtp_host_name'] = substr($hesk_settings['smtp_host_name'], 6);
        if ($hesk_settings['smtp_enc'] == '') {
            $hesk_settings['smtp_enc'] = 'ssl';
        }
    }

	// Assign all required values
    foreach ($hesk_default as $k => $v)
    {
    	if (is_array($v))
        {
        	// Arrays will be processed separately
        	continue;
        }
    	if ( ! isset($hesk_settings[$k]))
        {
			$hesk_settings[$k] = $v;
        }
    }

	// Arrays need special care
    $hesk_settings['barcode'] = isset($hesk_settings['barcode']) ? $hesk_settings['barcode'] : $hesk_default['barcode'];
    $hesk_settings['attachments'] = isset($hesk_settings['attachments']) ? $hesk_settings['attachments'] : $hesk_default['attachments'];
    $hesk_settings['email_providers'] = isset($hesk_settings['email_providers']) ? array_unique(array_merge($hesk_settings['email_providers'], $hesk_default['email_providers'])) : $hesk_default['email_providers'];
    $hesk_settings['notify_spam_tags'] = isset($hesk_settings['notify_spam_tags']) ? $hesk_settings['notify_spam_tags'] : $hesk_default['notify_spam_tags'];
    $hesk_settings['ticket_list'] = isset($hesk_settings['ticket_list']) ? $hesk_settings['ticket_list'] : $hesk_default['ticket_list'];

    // Attachments max size must be multiplied by 1024 since version 2.4
    if ($hesk_settings['attachments']['max_size'] < 102400)
    {
		$hesk_settings['attachments']['max_size'] = $hesk_settings['attachments']['max_size'] * 1024;
    }

    // Encode and escape characters
    $set = $hesk_settings;
    foreach ($hesk_settings as $k=> $v)
    {
    	if (is_array($v) || is_object($v))
        {
        	continue;
        }
    	$set[$k] = addslashes($v);
    }
    $set['debug_mode'] = 0;

    $set['email_providers'] = count($hesk_settings['email_providers']) ?  "'" . implode("','", $hesk_settings['email_providers']) . "'" : '';
    $set['notify_spam_tags'] = count($hesk_settings['notify_spam_tags']) ?  "'" . implode("','", $hesk_settings['notify_spam_tags']) . "'" : '';
    $set['ip_whois'] = str_replace('http://whois.domaintools.com', 'https://whois.domaintools.com', $set['ip_whois']);

    // reCaptcha v1 has been removed in 2.8, disable it
    if ($set['recaptcha_use'] == 1 && version_compare($hesk_settings['update_from'], '2.8', '<'))
    {
        $set['recaptcha_use'] = 0;
        define('RECAPTCHA_V1', true);
    }

	hesk_iSaveSettingsFile($set);

	return true;

} // End hesk_iSaveSettings()


function hesk_defaultSettings()
{
	$spam_question = hesk_generate_SPAM_question();

	$secimg_sum = '';
	for ($i=1;$i<=10;$i++)
	{
	    $secimg_sum .= substr('AEUYBDGHJLMNPQRSTVWXZ123456789', rand(0,29), 1);
	}

	// --> General settings
	$hesk_settings['site_title']='Website';
	$hesk_settings['site_url']='https://www.example.com';
	$hesk_settings['hesk_title']='Help Desk';
	$hesk_settings['hesk_url']='https://www.example.com/helpdesk';
	$hesk_settings['webmaster_mail']='support@example.com';
    $hesk_settings['site_theme']='hesk3';
    $hesk_settings['admin_css']=0;
    $hesk_settings['admin_css_url']='https://www.example.com/hesk-style.css';
    $hesk_settings['admin_js']=0;
    $hesk_settings['admin_js_url']='https://www.example.com/hesk-script.js';

	// --> Language settings
	$hesk_settings['can_sel_lang']=0;
	$hesk_settings['language']='English';
	$hesk_settings['languages']=array(
	'English' => array('folder'=>'en','hr'=>'------ Reply above this line ------'),
	);

	// --> Database settings
	$hesk_settings['db_host']='localhost';
	$hesk_settings['db_name']='hesk';
	$hesk_settings['db_user']='test';
	$hesk_settings['db_pass']='test';
	$hesk_settings['db_pfix']='hesk_';


	// ==> HELP DESK

	// --> Help desk settings
	$hesk_settings['admin_dir']='admin';
	$hesk_settings['attach_dir']='attachments';
	$hesk_settings['cache_dir']='cache';
	$hesk_settings['max_listings']=20;
	$hesk_settings['print_font_size']=12;
	$hesk_settings['autoclose']=0;
	$hesk_settings['max_open']=0;
	$hesk_settings['due_soon']=7;
	$hesk_settings['new_top']=0;
	$hesk_settings['reply_top']=0;
    $hesk_settings['hide_replies']=0;
    $hesk_settings['limit_width']=800;

	// --> Features
	$hesk_settings['autologin']=1;
	$hesk_settings['autoassign']=1;
	$hesk_settings['require_email']=1;
	$hesk_settings['require_owner']=0;
	$hesk_settings['require_subject']=1;
	$hesk_settings['require_message']=1;
	$hesk_settings['custclose']=1;
	$hesk_settings['custopen']=1;
	$hesk_settings['rating']=1;
	$hesk_settings['cust_urgency']=1;
	$hesk_settings['sequential']=1;
	$hesk_settings['time_worked']=1;
	$hesk_settings['spam_notice']=1;
	$hesk_settings['list_users']=0;
	$hesk_settings['debug_mode']=0;
	$hesk_settings['short_link']=0;
    $hesk_settings['submitting_wait']=1;
	$hesk_settings['select_cat']=0;
	$hesk_settings['select_pri']=0;
	$hesk_settings['cat_show_select']=15;
	$hesk_settings['staff_ticket_formatting']=0;

    // --> Barcode
    $hesk_settings['barcode']=array(
        'print' => 0,
        'staff_only' => 0,
        'type' => 'C128',
        'format' => 'svg',
        'width' => 300,
        'height' => 80,
        'color' => 'black',
        'bg' => 'white',
    );

    // --> Customer Accounts
    $hesk_settings['customer_accounts']=0;
    $hesk_settings['customer_accounts_required']=0;
    $hesk_settings['customer_accounts_customer_self_register']=1;
    $hesk_settings['customer_accounts_admin_approvals']=0;
    $hesk_settings['customer_autologin']=1;
    $hesk_settings['customer_accounts_allow_email_changes']=1;
    $hesk_settings['customer_accounts_verify_email_cooldown']=15;

	// --> SPAM Prevention
	$hesk_settings['secimg_use']=1;
	$hesk_settings['secimg_sum']=$secimg_sum;
	$hesk_settings['recaptcha_use']=0;
	$hesk_settings['recaptcha_public_key']='';
	$hesk_settings['recaptcha_private_key']='';
	$hesk_settings['question_use']=0;
	$hesk_settings['question_ask']=$spam_question[0];
	$hesk_settings['question_ans']=$spam_question[1];

	// --> Security
	$hesk_settings['attempt_limit']=6;
	$hesk_settings['attempt_banmin']=60;
    $hesk_settings['flood']=3;
	$hesk_settings['reset_pass']=1;
	$hesk_settings['email_view_ticket']=1;
	$hesk_settings['x_frame_opt']=1;
    $hesk_settings['samesite']='Lax';
	$hesk_settings['force_ssl']=0;
    $hesk_settings['url_key']='';
    $hesk_settings['require_mfa']=0;
    $hesk_settings['require_mfa_customers']=0;
    $hesk_settings['elevator_duration']='60M';

	// --> Attachments
	$hesk_settings['attachments']=array (
	'use' =>  1,
	'max_number' => 2,
	'max_size' => 2097152,
	'allowed_types' => array('.gif','.jpg','.png','.zip','.rar','.csv','.doc','.docx','.xls','.xlsx','.txt','.pdf'),
	'attachment_in_email_type' => 0,
	'direct_attachment_in_email' => 0,
	'direct_attachment_in_email_no_of_files' => 2,
	'first_x_attachments' => 2,
	'file_max_size' => 512000,
	);


	// ==> KNOWLEDGEBASE

	// --> Knowledgebase settings
	$hesk_settings['kb_enable']=1;
	$hesk_settings['kb_wysiwyg']=1;
	$hesk_settings['kb_search']=2;
	$hesk_settings['kb_search_limit']=10;
	$hesk_settings['kb_views']=0;
	$hesk_settings['kb_date']=0;
	$hesk_settings['kb_recommendanswers']=1;
	$hesk_settings['kb_rating']=1;
	$hesk_settings['kb_substrart']=200;
	$hesk_settings['kb_cols']=2;
	$hesk_settings['kb_numshow']=3;
	$hesk_settings['kb_popart']=6;
	$hesk_settings['kb_latest']=6;
	$hesk_settings['kb_index_popart']=6;
	$hesk_settings['kb_index_latest']=0;
	$hesk_settings['kb_related']=5;


	// ==> EMAIL

	// --> Email sending
	$hesk_settings['noreply_mail']='noreply@example.com';
	$hesk_settings['noreply_name']='Help Desk';
	$hesk_settings['email_max_recipients']=50;
	$hesk_settings['email_formatting']=0;
	$hesk_settings['smtp']=0;
	$hesk_settings['smtp_host_name']='mail.example.com';
	$hesk_settings['smtp_host_port']=587;
	$hesk_settings['smtp_timeout']=10;
	$hesk_settings['smtp_enc']='tls';
	$hesk_settings['smtp_noval_cert']=0;
	$hesk_settings['smtp_user']='';
	$hesk_settings['smtp_password']='';
    $hesk_settings['smtp_conn_type']='basic';
    $hesk_settings['smtp_oauth_provider']=0;

	// --> Email piping
	$hesk_settings['email_piping']=0;

	// --> IMAP Fetching
	$hesk_settings['imap']=0;
	$hesk_settings['imap_job_wait']=15;
	$hesk_settings['imap_host_name']='mail.example.com';
	$hesk_settings['imap_host_port']=993;
	$hesk_settings['imap_enc']='ssl';
	$hesk_settings['imap_noval_cert']=0;
    $hesk_settings['imap_disable_GSSAPI']=0;
	$hesk_settings['imap_keep']=0;
	$hesk_settings['imap_user']='';
	$hesk_settings['imap_password']='';
    $hesk_settings['imap_conn_type']='basic';
    $hesk_settings['imap_oauth_provider']=0;
	$hesk_settings['imap_mailbox']='INBOX';

	// --> POP3 Fetching
	$hesk_settings['pop3']=0;
	$hesk_settings['pop3_job_wait']=15;
	$hesk_settings['pop3_host_name']='mail.example.com';
	$hesk_settings['pop3_host_port']=110;
	$hesk_settings['pop3_tls']=0;
	$hesk_settings['pop3_keep']=0;
	$hesk_settings['pop3_user']='';
	$hesk_settings['pop3_password']='';
    $hesk_settings['pop3_conn_type']='basic';
    $hesk_settings['pop3_oauth_provider']=0;

	$hesk_settings['strip_quoted']=1;
	$hesk_settings['eml_req_msg']=0;
	$hesk_settings['save_embedded']=1;

    // --> Ignore emails
    $hesk_settings['pipe_block_noreply']=1;
    $hesk_settings['pipe_block_returned']=1;
    $hesk_settings['pipe_block_duplicate']=1;
	$hesk_settings['loop_hits']=6;
	$hesk_settings['loop_time']=300;
    $hesk_settings['pipe_customer_rejection_notification']=1;
    $hesk_settings['pipe_customer_rejection_email_cooldown_hours']=24;

	// --> Detect email typos
	$hesk_settings['detect_typos']=1;
	$hesk_settings['email_providers']=array('aim.com','aol.co.uk','aol.com','att.net','bellsouth.net','blueyonder.co.uk','bt.com','btinternet.com','btopenworld.com','charter.net','comcast.net','cox.net','earthlink.net','email.com','facebook.com','fastmail.fm','free.fr','freeserve.co.uk','gmail.com','gmx.at','gmx.ch','gmx.com','gmx.de','gmx.fr','gmx.net','gmx.us','googlemail.com','hotmail.be','hotmail.co.uk','hotmail.com','hotmail.com.ar','hotmail.com.mx','hotmail.de','hotmail.es','hotmail.fr','hushmail.com','icloud.com','inbox.com','laposte.net','lavabit.com','list.ru','live.be','live.co.uk','live.com','live.com.ar','live.com.mx','live.de','live.fr','love.com','lycos.com','mac.com','mail.com','mail.ru','me.com','msn.com','nate.com','naver.com','neuf.fr','ntlworld.com','o2.co.uk','online.de','orange.fr','orange.net','outlook.com','pobox.com','prodigy.net.mx','qq.com','rambler.ru','rocketmail.com','safe-mail.net','sbcglobal.net','t-online.de','talktalk.co.uk','tiscali.co.uk','verizon.net','virgin.net','virginmedia.com','wanadoo.co.uk','wanadoo.fr','yahoo.co.id','yahoo.co.in','yahoo.co.jp','yahoo.co.kr','yahoo.co.uk','yahoo.com','yahoo.com.ar','yahoo.com.mx','yahoo.com.ph','yahoo.com.sg','yahoo.de','yahoo.fr','yandex.com','yandex.ru','ymail.com');

	// --> Notify customer when
	$hesk_settings['notify_new']=1;
	$hesk_settings['notify_skip_spam']=1;
	$hesk_settings['notify_spam_tags']=array('Spam?}','***SPAM***','[SPAM]','SPAM-LOW:','SPAM-MED:');
	$hesk_settings['notify_closed']=1;

	// --> Other
	$hesk_settings['multi_eml']=0;
	$hesk_settings['confirm_email']=0;
	$hesk_settings['open_only']=1;

	// ==> TICKET LIST

	$hesk_settings['ticket_list']=array('trackid','lastchange','name','subject','status','lastreplier');

	// --> Other
	$hesk_settings['submittedformat']=2;
	$hesk_settings['updatedformat']=2;
    $hesk_settings['format_submitted']='Y-m-d H:i:s';
    $hesk_settings['format_updated']='Y-m-d H:i:s';


	// ==> MISC

	// --> Date & Time
	$hesk_settings['timezone']=date_default_timezone_get();
    $hesk_settings['format_time']='H:i:s';
    $hesk_settings['format_date']='Y-m-d';
    $hesk_settings['format_timestamp']='Y-m-d H:i:s';
    $hesk_settings['time_display']=1;
    $hesk_settings['format_datepicker_js']='mm/dd/yyyy';
    $hesk_settings['format_datepicker_php']='m/d/Y';

	// --> Other
	$hesk_settings['ip_whois']='https://whois.domaintools.com/{IP}';
	$hesk_settings['maintenance_mode']=0;
	$hesk_settings['alink']=1;
	$hesk_settings['submit_notice']=0;
	$hesk_settings['online']=0;
	$hesk_settings['online_min']=10;
	$hesk_settings['check_updates']=1;

	return $hesk_settings;
} // END hesk_defaultSettings()


function hesk_iDetectVersion()
{
	global $hesk_settings, $hesklang;

    // Get a list of tables from the database
    $tables = array();
    $res = hesk_dbQuery('SHOW TABLES FROM `'.hesk_dbEscape($hesk_settings['db_name']).'`');
    while ($row = hesk_dbFetchRow($res))
    {
        $tables[] = $row[0];
    }

    // If we don't have four basic tables this is not a valid HESK install
    if ( ! in_array($hesk_settings['db_pfix'].'categories', $tables) || ! in_array($hesk_settings['db_pfix'].'replies', $tables) || ! in_array($hesk_settings['db_pfix'].'tickets', $tables) || ! in_array($hesk_settings['db_pfix'].'users', $tables) )
    {
        hesk_iDatabase(3);
    }

    // Version 3.6.0 tables installed?
    if (in_array($hesk_settings['db_pfix'].'ticket_to_collaborator', $tables))
    {
        return '3.6.0';
    }

    // Version 3.5.0 tables installed?
    if (in_array($hesk_settings['db_pfix'].'customers', $tables))
    {
        // Version 3.5.2 tables installed?
        $res = hesk_dbQuery("SELECT CHARACTER_MAXIMUM_LENGTH FROM INFORMATION_SCHEMA.COLUMNS WHERE table_name = '".hesk_dbEscape($hesk_settings['db_pfix'])."tickets' AND table_schema = '".hesk_dbEscape($hesk_settings['db_name'])."' AND column_name = 'eid' LIMIT 0, 1");
        $row = hesk_dbFetchRow($res);
        if ($row[0] == 1000)
        {
            return '3.5.2';
        }

        return '3.5.0';
    }

    // Version 3.4.0 tables installed?
    if (in_array($hesk_settings['db_pfix'].'oauth_providers', $tables))
    {
        return '3.4.0';
    }

    // Version 3.3.0 tables installed?
    if (in_array($hesk_settings['db_pfix'].'auth_tokens', $tables))
    {
        return '3.3.0';
    }

    // Version 3.2.0 tables installed?
    if (in_array($hesk_settings['db_pfix'].'log_overdue', $tables))
    {
        return '3.2.0';
    }

    // Version 2.8.3 tables installed?
    $res = hesk_dbQuery("SELECT CHARACTER_MAXIMUM_LENGTH FROM INFORMATION_SCHEMA.COLUMNS WHERE table_name = '".hesk_dbEscape($hesk_settings['db_pfix'])."tickets' AND table_schema = '".hesk_dbEscape($hesk_settings['db_name'])."' AND column_name = 'name' LIMIT 0, 1");
    $row = hesk_dbFetchRow($res);
    if ($row[0] == 255)
    {
        return '2.8.3';
    }

    // Version 2.8.2 tables installed?
    if (in_array($hesk_settings['db_pfix'].'service_messages', $tables))
    {
        $res = hesk_dbQuery("SHOW COLUMNS FROM `".hesk_dbEscape($hesk_settings['db_pfix'])."service_messages` LIKE 'language'");
        if (hesk_dbNumRows($res))
        {
            return '2.8.2';
        }
    }

    // Version 2.8 tables installed?
    $res = hesk_dbQuery("SHOW COLUMNS FROM `".hesk_dbEscape($hesk_settings['db_pfix'])."tickets` LIKE 'assignedby'");
    if (hesk_dbNumRows($res))
    {
        return '2.8';
    }

	// Version 2.7 tables installed?
	if (
		in_array($hesk_settings['db_pfix'].'custom_fields', $tables) ||
        in_array($hesk_settings['db_pfix'].'custom_statuses', $tables)
		)
	{
		return '2.7';
	}

	// Version 2.6 tables installed?
	if (
		in_array($hesk_settings['db_pfix'].'banned_emails', $tables) ||
		in_array($hesk_settings['db_pfix'].'banned_ips', $tables) ||
		in_array($hesk_settings['db_pfix'].'reply_drafts', $tables) ||
		in_array($hesk_settings['db_pfix'].'reset_password', $tables) ||
		in_array($hesk_settings['db_pfix'].'service_messages', $tables) ||
		in_array($hesk_settings['db_pfix'].'ticket_templates', $tables)
		)
	{
		return '2.6';
	}

	// Version 2.4/2.5 tables installed?
	elseif (in_array($hesk_settings['db_pfix'].'pipe_loops', $tables))
	{
		// Version 2.4 didn't have articles_private in kb_categories
		$res = hesk_dbQuery("SELECT * FROM `".hesk_dbEscape($hesk_settings['db_pfix'])."kb_categories` WHERE `id`=1 LIMIT 1");
		$row = hesk_dbFetchAssoc($res);
		if (isset($row['articles_private']))
		{
			// This is one of the 2.5.x version
            // Database is 100% compatible, so let's be safe and return 2.5
            return '2.5';
		}
		else
		{
			return '2.4';
		}
	}

	// Version 2.3 tables installed?
	elseif (in_array($hesk_settings['db_pfix'].'online', $tables) || in_array($hesk_settings['db_pfix'].'logins', $tables))
	{
		return '2.3';
	}

	// Version 2.2 tables installed?
	elseif (in_array($hesk_settings['db_pfix'].'mail', $tables))
	{
		return '2.2';
	}

	// Version 2.1 tables installed?
	elseif (in_array($hesk_settings['db_pfix'].'kb_attachments', $tables))
	{
		return '2.1';
	}

	// Version 2.0 tables installed?
	elseif (in_array($hesk_settings['db_pfix'].'kb_articles', $tables))
	{
		return '2.0';
	}

	// Version 0.94.1 tables installed?
	elseif (in_array('hesk_attachments', $tables))
	{
		return '0.94.1';
	}

	// Version 0.94 tables installed?
	elseif (in_array('hesk_std_replies', $tables))
	{
		return '0.94';
	}

	// It's a version older than 0.94 or no tables found
	else
	{
		// Version 0.90 didn't have the notify column in users table
		$res = hesk_dbQuery("SELECT * FROM `hesk_users` WHERE `id`=1 LIMIT 1");
		$row = hesk_dbFetchAssoc($res);
		if (isset($row['notify']))
		{
			return '0.91-0.93.1';
		}
		else
		{
        	// Wow, we found someone using the very first HESK version :-)
			return '0.90';
		}
	}

} // END hesk_iDetectVersion()
?>

