/*
 * Copyright (C) 2022 Mikhail Burakov. This file is part of toolbox.
 *
 * toolbox is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * toolbox is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with toolbox.  If not, see <https://www.gnu.org/licenses/>.
 */

#ifndef TOOLBOX_MQTT_PARSER_H_
#define TOOLBOX_MQTT_PARSER_H_

#include <stdbool.h>
#include <stddef.h>

#ifdef __cplusplus
extern "C" {
#endif  // __cplusplus

enum MqttParserResult {
  kMqttParserResultFinished = 0,
  kMqttParserResultWantMore,
  kMqttParserResultError,
};

struct MqttParserCallbacks {
  void (*on_connect_ack)(void* user, bool success);
  void (*on_subscribe_ack)(void* user, bool success);
  void (*on_publish)(void* user, const char* topic, size_t topic_size,
                     const void* payload, size_t payload_size);
  void (*on_finished)(void* user, size_t offset);
};

enum MqttParserResult MqttParserParse(
    const void* buffer, size_t buffer_size,
    const struct MqttParserCallbacks* callbacks, void* user);

#ifdef __cplusplus
}  // extern "C"
#endif  // __cplusplus

#endif  // TOOLBOX_MQTT_PARSER_H_