mdns_cache.h

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/***************************************************************************
 *   Copyright (C) 2024  Alec Leamas                                       *
 *                                                                         *
 *   This program 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 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program 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 this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
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 **************************************************************************/
 
#ifndef MDNS_CACHE_H
#define MDNS_CACHE_H
 
#include <mutex>
#include <string>
#include <vector>
 
class MdnsCache {
public:
  struct Entry {
    std::string service_instance;
    std::string hostname;
    std::string ip;
    std::string port;
    Entry(const std::string& service, const std::string host,
          const std::string& _ip, const std::string _port)
        : service_instance(service), hostname(host), ip(_ip), port(_port) {}
  };
 
  static MdnsCache& GetInstance();
 
  MdnsCache& operator=(MdnsCache&) = delete;
  MdnsCache(const MdnsCache&) = delete;
 
  void Validate();
 
  bool Add(const Entry& entry);
 
  bool Add(const std::string& service, const std::string& host,
           const std::string& _ip, const std::string& _port);
 
  bool Add(const std::string& _ip, const std::string& _port);
 
  const std::vector<Entry>& GetCache() const { return m_cache; }
 
private:
  mutable std::mutex m_mutex;
  std::vector<Entry> m_cache;
 
  MdnsCache() = default;
};
 
#endif  // MDNS_CACHE_H