// Copyright 2020-2026 The NATS Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Adapted from server/mqtt.go in the NATS server Go source.

using ZB.MOM.NatsNet.Server.Mqtt;

namespace ZB.MOM.NatsNet.Server;

// ============================================================================
// ClientConnection — MQTT partial (Sub-batch E, features 2257-2384)
// ============================================================================

public sealed partial class ClientConnection
{
    // ------------------------------------------------------------------
    // MQTT state field
    // ------------------------------------------------------------------

    /// <summary>
    /// Per-connection MQTT handler, non-null only for MQTT client connections.
    /// Mirrors Go <c>client.mqtt *mqtt</c> field in server/mqtt.go.
    /// </summary>
    internal MqttHandler? Mqtt { get; private set; }

    /// <summary>
    /// Attaches an MQTT handler to this connection.
    /// Called during CONNECT processing.
    /// </summary>
    internal void InitMqtt(MqttHandler handler) => Mqtt = handler;
}