#ifndef PROTOCOL_H
#define PROTOCOL_H

#include <limits.h>
#include <stdint.h>
#include <string.h>
#include <time.h>

#define VERSION			 1
#define MAX_CONTENT_SIZE (PIPE_BUF - sizeof(struct MessageHeader))
#define MESSAGE_SIZE sizeof(struct Message)

typedef struct MessageHeader {
	// The protocol's version
	unsigned int version;
	// The sender is a user
	unsigned int sender;
	// The receiver is either a user or a group
	unsigned int receiver;
	// The message was sent at this timestamp
	time_t timestamp;
} message_header;

typedef struct Message {
	// The message's header
	message_header header;
	// The buffer holding the message
	char content[MAX_CONTENT_SIZE];
} message;


int new_message(message *m, unsigned int sender, unsigned int receiver, char *content);

#endif // !PROTOCOL_H