Message.h

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#ifndef LINTEL_MESSAGE_H
#define LINTEL_MESSAGE_H
 
#include <lintel/config.h>
 
#include <chrono>
#include <string>
 
namespace lintel {
class Message
{
private:
  char m_receiver[MSG_QUEUE_NAME_SIZE]{};
  char m_sender[MSG_QUEUE_NAME_SIZE]{};
  char m_content[MSG_QUEUE_CONTENT_SIZE]{};
  time_t m_sendTime{};
 
public:
  Message(const std::string &receiver, const std::string &sender);
 
  Message() = default;
 
  [[nodiscard]] const char *receiverOf() const;
 
  [[nodiscard]] const char *senderOf() const;
 
  [[nodiscard]] std::chrono::time_point<std::chrono::system_clock> sendTimeOf() const;
 
  template<typename T> void assign(T content)
  {
    static_assert(sizeof(T) <= sizeof(m_content), "content is bigger than reserved size for content");
    char *temp = static_cast<char *>(static_cast<void *>(&content));
    /*
     * We'll cast an object to a char array. We have to copy it manually
     * and not with std::strcpy or std::strncpy bc. those function will stop
     * copying by the first 0 terminator.
     */
    for (int i = 0; i < sizeof(T); i++) { m_content[i] = temp[i]; }
  }
 
  template<typename T> T as()
  {
    static_assert(sizeof(T) <= sizeof(m_content), "content is bigger than reserved size for content");
    return *static_cast<T *>(static_cast<void *>(m_content));
  }
};
 
}// namespace lintel
#endif// LINTEL_MESSAGE_H