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#include <stdio.h>
#include <stdlib.h>
#include <termios.h>
#include <unistd.h>
#include <poll.h>
#include <errno.h>
#include <ctype.h>
#include "str.h"
#include "ser.h"
#include "net.h"
#include "ticker.h"
#include "sig.h"
#include "content.h"
typedef struct {
str name;
uint64_t id;
} player;
typedef struct {
peer conn;
struct termios oldtio;
str name;
str pass;
uint64_t self_id;
array(player) players;
str server_motd;
} client;
void gfx_alt_buffer(bool enable)
{
if (enable)
printf("\e[?1049h\e[?25l");
else
printf("\e[?1049l\e[?25h");
}
void gfx_clear()
{
printf("\e[2J");
}
void gfx_render(client *c, uint64_t dtime)
{
gfx_clear();
printf("\e[H");
printf("%.*s\n", PSTR(c->server_motd));
for (size_t i = 0; i < c->players.len; i++)
printf("%.*s\n", PSTR(c->players.data[i].name));
fflush(stdout);
}
void free_players(client *c)
{
for (size_t i = 0; i < c->players.len; i++)
free(c->players.data[i].name.data);
free(c->players.data);
c->players.len = 0;
c->players.data = NULL;
}
void client_exit(client *c, int ret)
{
free(c->name.data);
free(c->pass.data);
free(c->server_motd.data);
free_players(c);
peer_free(&c->conn);
tcsetattr(STDIN_FILENO, TCSANOW, &c->oldtio);
gfx_alt_buffer(false);
exit(ret);
}
void handle_input(client *c, char ch)
{
ch = tolower(ch);
switch (ch) {
case 'q': client_exit(c, EXIT_SUCCESS); break;
default: break;
}
}
bool handle_players(str *w, client *c)
{
free_players(c);
uint16_t len;
if (!deser_u16(w, &len))
return false;
c->players.data = malloc(sizeof *c->players.data * len);
for (c->players.len = 0; c->players.len < len; c->players.len++) {
player *p = &c->players.data[c->players.len];
if (!deser_str(w, &p->name))
return false;
if (!deser_u64(w, &p->id))
return false;
if (str_eq(p->name, c->name))
c->self_id = p->id;
p->name = str_clone(p->name);
}
return true;
}
bool handle_hi(str *w, client *c)
{
str motd;
if (!deser_str(w, &motd))
return false;
c->server_motd = str_clone(motd);
return true;
}
bool handle_pkt(client *c, str pkt)
{
pkt_type type;
if (!deser_pkt_type(&pkt, &type))
return false;
switch (type) {
case CPKT_HI: return handle_hi(&pkt, c);
case CPKT_PLAYERS: return handle_players(&pkt, c);
default: return false;
}
}
int main(int argc, char **argv)
{
if (argc < 4) {
fprintf(stderr, "usage: %s server port name [pass]\n", argv[0]);
return EXIT_FAILURE;
}
signal_setup();
client c = {0};
const char *server = argv[1];
const char *port = argv[2];
c.name = str_clone(str_intro(argv[3]));
c.pass = str_clone(argc < 5 ? S("") : str_intro(argv[4]));
c.conn.socket = -1;
tcgetattr(STDIN_FILENO, &c.oldtio); // TODO: handle error
struct termios newtio = c.oldtio;
newtio.c_lflag &= ~(ICANON | ECHO);
tcsetattr(STDIN_FILENO, TCSANOW, &newtio); // TODO: handle error
SET_NONBLOCK(STDIN_FILENO); // TODO: handle error
int socket = socket_create(server, port, false);
if (socket < 0)
client_exit(&c, EXIT_FAILURE);
str server_name = S("server");
peer_init(&c.conn, socket, &server_name);
gfx_alt_buffer(true);
SEND_PKT(c.conn, SPKT_HI,
ser_str(&pkt, c.name);
ser_str(&pkt, c.pass);
)
ticker t;
ticker_init(&t, NANOS/60);
for (;;) {
struct pollfd fds[2];
fds[0].fd = STDIN_FILENO;
fds[0].events = POLLIN;
fds[1] = peer_prepare(&c.conn);
if (poll(fds, 2, ticker_timeout(&t)) < 0) {
switch (errno) {
case EINTR: break;
default: perror("poll"); continue;
}
}
if (signal_stop)
client_exit(&c, EXIT_SUCCESS);
if (fds[0].revents) {
// this is cursed
// maybe dont do this idk
char ch;
errno = 0;
while (read(STDIN_FILENO, &ch, 1) == 1)
handle_input(&c, ch);
switch (errno) {
case 0: case EWOULDBLOCK: case EINTR: break;
default: perror("read"); break;
}
}
str pkt = peer_recv(&c.conn, fds[1]);
if (c.conn.disco)
client_exit(&c, EXIT_SUCCESS);
if (pkt.len > 0 && !handle_pkt(&c, pkt))
invalid_pkt(&c.conn, pkt);
uint64_t dtime;
if (ticker_tick(&t, &dtime))
gfx_render(&c, dtime);
}
}
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