function ChatHeader($id){

    global $sqlConnect;
    global $url;
    $MyID = GetUserSession();
    $query = mysqli_query($sqlConnect, "SELECT relation_arr FROM " .  T_FOLLOWS . " WHERE `user_id` = '" . $MyID . "'");
    $fetched_data = mysqli_fetch_assoc($query);

    $arr = $fetched_data['relation_arr'];
    $arr = unserialize($arr);
    $content = '';

    if(in_array($id,$arr, TRUE)){
        $awsbucketurl = "https://yozax-main-bucket.s3.amazonaws.com/";
        $data = mysqli_query($sqlConnect, "SELECT * FROM " .  T_USERS . " WHERE `user_id` = '" . $id . "'");
        $fetched_user = mysqli_fetch_assoc($data);
        $content .= '<img class="shotimgonlistHeader"  src="'.$awsbucketurl . $fetched_user['avatar'].'">';
        $content .= '<div>';
        $content .= '<h2 class="onlistName">'.$fetched_user['username'].'</h2>';
        $content .= '</div>';


    }

    return $content;

}


function AddMessage($toid,$msg){
    global $sqlConnect;
    $MyID = GetUserSession();

    if (empty($toid) || empty($msg)) {
        return false;
    }

    $query = mysqli_query($sqlConnect, "SELECT user_id FROM " .  T_USERS . " WHERE `user_id` = '" .$toid. "'");
    $fetched_data = mysqli_fetch_assoc($query);

    if (empty($fetched_data['user_id'])) {
        return false;
    }

    if($MyID == $toid){
        return false;
    }

    $fields = $fields = 'from_id,to_id,msg,date';
    $now = date("Y-m-d H:i:s");

    $query = mysqli_query($sqlConnect, "INSERT INTO " . T_MSG . " ({$fields}) VALUES ('{$MyID}','{$toid}','{$msg}','{$now}')") or die(mysqli_error($sqlConnect));

    return true;


}


function LoadChat($id){
    global $sqlConnect;
    $MyID = GetUserSession();
    $query = mysqli_query($sqlConnect, "SELECT relation_arr FROM " .  T_FOLLOWS . " WHERE `user_id` = '" . $MyID . "'");
    $fetched_data = mysqli_fetch_assoc($query);

    $arr = $fetched_data['relation_arr'];
    $arr = unserialize($arr);
    $content = '';

    if(in_array($id,$arr, TRUE)){

        $query = mysqli_query($sqlConnect, "SELECT * FROM " .  T_MSG . " WHERE `from_id` = '" . $MyID . "' and `to_id` = '" . $id . "' OR  `from_id` = '" . $id . "' and `to_id` = '" . $MyID . "'");

        while ($v = mysqli_fetch_assoc($query)) {
            if($v['from_id'] == $MyID){
                $content .='<li class="me">';
                $content .='<div class="entete">';
                $content .='<h3>'.$v['date'].'</h3>';
                $content .='<span class="status blue"</span>';
                $content .='</div>';
                $content .='<div class="triangle"></div>';
                $content .='<div class="message">';
                $content .=$v['msg'];
                $content .='</div>';
                $content .='</li>';
            }else{
                $content .='<li class="you">';
                $content .='<div class="entete">';
                $content .='<h3>'.$v['date'].'</h3>';
                $content .='<span class="status green"</span>';
                $content .='</div>';
                $content .='<div class="triangle"></div>';
                $content .='<div class="message">';
                $content .=$v['msg'];
                $content .='</div>';
                $content .='</li>';
            }
        }

    }

    return $content;
}

///////////////////////////////////////////////////////////////////////////
THE AJAX FILE

  if( $_GET['type'] === 'chatheader'){
        if(isset($_POST['id'])){
            $content = ChatHeader($_POST['id']);
            $data = array(
                'status' =>  true,
                'content' => $content
            );
            echo json_encode($data);
            exit;
        }
    }
    if( $_GET['type'] === 'addmsg'){
        if(isset($_POST['id'])){
            if(isset($_POST['msg'])){
                    $return = AddMessage($_POST['id'],$_POST['msg']);
                    $data = array(
                        'status' =>  $return
                    );
                    echo json_encode($data);
                    exit;
            }
        }
    }
    if( $_GET['type'] === 'chatlist'){
        if(isset($_POST['id'])){

                    $content = LoadChat($_POST['id']);
                    $data = array(
                        'content' =>$content,
                        'status' =>  true
                    );
                    echo json_encode($data);
                    exit;

        }
    }