.-.-.-.-.-

<?php
/**
 * @copyright (C) 2016 iJoomla, Inc. - All rights reserved.
 * @license GNU General Public License, version 2 (http://www.gnu.org/licenses/gpl-2.0.html)
 * @author iJoomla.com <webmaster@ijoomla.com>
 * @url https://www.jomsocial.com/license-agreement
 * The PHP code portions are distributed under the GPL license. If not otherwise stated, all images, manuals, cascading style sheets, and included JavaScript *are NOT GPL, and are released under the IJOOMLA Proprietary Use License v1.0
 * More info at https://www.jomsocial.com/license-agreement
 */

use Joomla\CMS\Factory;
use Joomla\CMS\Table\Table;

defined('_JEXEC') or die('Restricted access');

class CTableGroupChat extends Table
{
    var $id	= null;
    var $created_by = null;
    var $params	= null;

/**
     * Constructor
     */
    public function __construct( &$db )
    {
        parent::__construct( '#__community_group_chat', 'id', $db );
    }

/**
     * Handle all sorts of load error
     */
    public function load( $id=null, $reset = true )
    {
        parent::load( $id , $reset);
        return;
    }

/**
     * we always store a new one because edit is not possible in chat
     * @param bool $updateNulls
     * @return bool
     */
    public function store($updateNulls = false)
    {
        //only create this entry if there is no such records
        if(!$this->id){

$this->created_by		= $this->created_by;
            parent::store($updateNulls);
            /*
            $db		=  $this->getDBO();
            $obj			= new stdClass();
            $obj->from		= $this->from;
            $obj->to	= $this->to;
            $this->load($db->insertObject( '#__community_chat' , $obj ));
            return $this;
            */
             return true;
        }

$this->updated_at = date('Y-m-d H:i:s');
        parent::store($updateNulls);
    }

public function setReadBy($userId, $groupChatReplyId){
        $params = new CParameter($this->params);
        $readByArray = $params->get('read_by');
        $readByArray->$userId = $groupChatReplyId;
        $params->set('read_by', $readByArray);
        $this->params = $params->toString();
    }

/**
     * get the list of user that read the message at which group_chat_reply_id
     */
    public function getReadBy(){
        $params = new CParameter($this->params);
        $readByObj = $params->get('read_by');
        return $readByObj;
    }

/**
     * Remove all chat entries
     * @param $chatId
     */
    public function removeAllChat($chatId){
        $db = Factory::getDbo();
        $query = "DELETE FROM ".$db->quoteName('#__community_group_chat')." WHERE "
            .$db->quoteName('id')."=".$db->quote($chatId);
        $db->setQuery($query);
        $db->execute();
    }

public function delete($id = null)
    {

}
}

/var/www/html/1c732/../1c732/./../components/com_community/tables/groupchat.php