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#include <string.h>
#include <unistd.h>
#include <netinet/in.h> // for sockaddr_in
#include <arpa/inet.h> // for iten_aton
#include <sys/types.h> // for bind, connect
#include <sys/socket.h> // for bind, connect
#include <fcntl.h>
#include <cerrno>
#include <stdio.h>
#include "user.hpp"
const int key_enter = 10;
const int key_escape = 27;
const int key_backspace = 127;
Client *Client::Start(const char* ip, int port)
{
int client;
client = socket(AF_INET, SOCK_STREAM, 0);
if(client == -1) return 0;
// remove "port sticking" aka socket in TIME_WAIT
int opt = 1;
setsockopt(client, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
/* call bind optional, the system chooses
the address automatically */
struct sockaddr_in server_adress;
server_adress.sin_family = AF_INET;
server_adress.sin_port = htons(port);
if(!inet_aton(ip, &(server_adress.sin_addr))) return 0;
int res = connect(client, (struct sockaddr*) &server_adress,
sizeof(server_adress));
if(res == -1) return 0;
return new Client(client);
}
void Client::Run(ChatRoom *room)
{
unsigned int usecs = 0100000;
int flags = fcntl(fd, F_GETFL, 0);
fcntl(fd, F_SETFL, flags | O_NONBLOCK);
int cls = false;
do {
this->HandleButton(room);
int recive = read(fd, out_buffer+out_buf_used,
sizeof(out_buffer)-out_buf_used);
if(recive < 0) {
if(errno != EINTR && errno != EAGAIN)
break;
}
else if(recive > 0)
out_buf_used += recive;
else {
if(!cls) {
strcpy(out_buffer, "Server closed the connection. Use ESC to exit.");
room->AddMessage(out_buffer, system_msg);
cls = true;
}
}
if(out_buf_used > 0) {
/* warning: if we get a (message without '\n') > max_msg_len then
this code will not work */
for(int i = 0; i < out_buf_used; i++) {
if(out_buffer[i] == '\n') {
out_buffer[i] = 0;
// in first char have may spec-symbol, check it:
int spec_msg = usual_msg;
char *buf = out_buffer;
if(out_buffer[0] == system_char) {
spec_msg = system_msg;
buf += 1;
}
room->AddMessage(buf, spec_msg);
memmove(out_buffer, out_buffer + i + 1, out_buf_used - i - 1);
out_buf_used -= i + 1;
break;
}
}
}
usleep(usecs);
} while (!exit_flag);
}
void Client::HandleButton(ChatRoom *room)
{
int key = room->InputGetch();
switch(key)
{
case key_escape: {
this->BreakLoop();
break;
}
case ' '...'~': { // ascii table 32...126
AddCharToBuffer(key);
room->AddCharToSendMsg(key);
break;
}
case '\n': { // send message
SendMessage();
room->InputClear();
room->SetInputCursor(1, 1);
break;
}
case key_backspace: {
RemoveCharFromBuffer();
room->RemoveCharFromMsg();
break;
}
default: break;
}
}
void Client::AddCharToBuffer(char ch)
{
if(in_buf_used >= max_usermsg_len-1)
return;
in_buffer[in_buf_used] = ch;
in_buf_used++;
}
void Client::RemoveCharFromBuffer()
{
if(in_buf_used <= 0)
return;
in_buffer[in_buf_used] = '\0';
in_buf_used--;
}
void Client::SendMessage()
{
if(in_buf_used <= 0)
return;
in_buffer[in_buf_used] = '\n';
write(fd, in_buffer, (in_buf_used+1)*sizeof(char));
memset(in_buffer, 0, (in_buf_used+1)*sizeof(char));
in_buf_used = 0;
}
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