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toaruos/apps/irc.c

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/* vim: tabstop=4 shiftwidth=4 noexpandtab
* This file is part of ToaruOS and is released under the terms
* of the NCSA / University of Illinois License - see LICENSE.md
* Copyright (C) 2018 K. Lange
*
* irc - Internet Relay Chat client
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <termios.h>
#include <va_list.h>
#include <time.h>
#include <string.h>
#include <sys/fswait.h>
#define _ITALIC "\033[3m"
#define _END "\033[0m\n"
#define VERSION_STRING "0.3.0"
/* Theming */
#define TIME_FMT "%02d:%02d:%02d"
#define TIME_ARGS hr, min, sec
static char * nick = "toaru-user";
static char * host = NULL;
static char * pass = NULL;
static unsigned short port = 6667;
static char * channel = NULL;
static int sock_fd;
static FILE * sock_r;
static FILE * sock_w;
struct color_pair {
int fg;
int bg;
};
static void show_usage(int argc, char * argv[]) {
fprintf(stderr,
"irc - Terminal IRC client.\n"
"\n"
"usage: %s [-h] [-p port] [-n nick] host\n"
"\n"
" -p port " _ITALIC "Specify port to connect to" _END
" -P pass " _ITALIC "Password for server connection" _END
" -n nick " _ITALIC "Specify a nick to use" _END
" -h " _ITALIC "Print this help message" _END
"\n", argv[0]);
exit(1);
}
static struct termios old;
static void set_unbuffered() {
tcgetattr(fileno(stdin), &old);
struct termios new = old;
new.c_lflag &= (~ICANON & ~ECHO);
tcsetattr(fileno(stdin), TCSAFLUSH, &new);
}
static void set_buffered() {
tcsetattr(fileno(stdin), TCSAFLUSH, &old);
}
static int user_color(char * user) {
int i = 0;
while (*user) {
i += *user;
user++;
}
i = i % 5;
switch (i) {
case 0: return 2;
case 1: return 3;
case 2: return 4;
case 3: return 6;
case 4: return 10;
}
return 0;
}
static struct color_pair irc_color_to_pair(int fg, int bg) {
int _fg = 0;
int _bg = 0;
if (fg == -1) {
_fg = -1;
} else {
fg = fg % 16;
switch (fg) {
case 0: _fg = 15; break;
case 1: _fg = 0; break;
case 2: _fg = 4; break;
case 3: _fg = 2; break;
case 4: _fg = 9; break;
case 5: _fg = 1; break;
case 6: _fg = 5; break;
case 7: _fg = 3; break;
case 8: _fg = 11; break;
case 9: _fg = 10; break;
case 10: _fg = 6; break;
case 11: _fg = 14; break;
case 12: _fg = 12; break;
case 13: _fg = 13; break;
case 14: _fg = 8; break;
case 15: _fg = 7; break;
}
}
if (bg == -1) {
_bg = -1;
} else {
bg = bg % 16;
switch (bg) {
case 0: _bg = 15; break;
case 1: _bg = 0; break;
case 2: _bg = 4; break;
case 3: _bg = 2; break;
case 4: _bg = 9; break;
case 5: _bg = 1; break;
case 6: _bg = 5; break;
case 7: _bg = 3; break;
case 8: _bg = 11; break;
case 9: _bg = 10; break;
case 10: _bg = 6; break;
case 11: _bg = 14; break;
case 12: _bg = 12; break;
case 13: _bg = 13; break;
case 14: _bg = 8; break;
case 15: _bg = 7; break;
}
}
return (struct color_pair){_fg, _bg};
}
static void get_time(int * h, int * m, int * s) {
time_t rawtime;
time(&rawtime);
struct tm *tm_struct = localtime(&rawtime);
*h = tm_struct->tm_hour;
*m = tm_struct->tm_min;
*s = tm_struct->tm_sec;
}
static void print_color(struct color_pair t) {
fprintf(stdout, "\033[");
if (t.fg == -1) {
fprintf(stdout,"39");
} else if (t.fg > 15) {
/* TODO */
} else if (t.fg > 7) {
fprintf(stdout,"9%d", t.fg - 8);
} else {
fprintf(stdout,"3%d", t.fg);
}
fprintf(stdout, ";");
if (t.bg == -1) {
fprintf(stdout, "49");
} else if (t.bg > 15) {
/* TODO */
} else if (t.bg > 7) {
fprintf(stdout,"10%d", t.bg - 8);
} else {
fprintf(stdout,"4%d", t.bg);
}
fprintf(stdout, "m");
fflush(stdout);
}
static void WRITE(const char * fmt, ...) {
int bold_on = 0;
int italic_on = 0;
va_list args;
va_start(args, fmt);
char * tmp;
vasprintf(&tmp, fmt, args);
va_end(args);
struct winsize w;
ioctl(0, TIOCGWINSZ, &w);
fprintf(stdout,"\033[%d;1H\033[K", w.ws_row);
int line_feed_pending = 0;
char * c = tmp;
while (*c) {
if (*c == '\n') {
if (line_feed_pending) {
/* Print line feed */
fprintf(stdout, "\n");
}
line_feed_pending = 1;
c++;
continue;
} else {
if (line_feed_pending) {
line_feed_pending = 0;
/* Print line feed */
fprintf(stdout, "\n");
}
}
if (*c == 0x03) {
c++;
int i = -1;
int j = -1;
if (*c >= '0' && *c <= '9') {
i = (*c - '0');
c++;
}
if (*c >= '0' && *c <= '9') {
i *= 10;
i += (*c - '0');
c++;
}
if (*c == ',') {
c++;
if (*c >= '0' && *c <= '9') {
j = (*c - '0');
c++;
}
if (*c >= '0' && *c <= '9') {
j *= 10;
j = (*c - '0');
c++;
}
}
struct color_pair t = irc_color_to_pair(i, j);
print_color(t);
continue;
}
if (*c == 0x02) {
if (bold_on) {
fprintf(stdout,"\033[22m");
bold_on = 0;
} else {
fprintf(stdout,"\033[1m");
bold_on = 1;
}
c++;
continue;
}
if (*c == 0x16) {
if (italic_on) {
fprintf(stdout,"\033[23m");
italic_on = 0;
} else {
fprintf(stdout,"\033[3m");
italic_on = 1;
}
c++;
continue;
}
if (*c == 0x0f) {
fprintf(stdout, "\033[0m");
c++;
bold_on = 0;
italic_on = 0;
continue;
}
fprintf(stdout, "%c", *c);
c++;
}
if (line_feed_pending) {
fprintf(stdout, "\033[0m\033[K\n");
}
fflush(stdout);
free(tmp);
}
static void handle(char * line) {
char * c = line;
while (c < line + strlen(line)) {
char * e = strstr(c, "\r\n");
if (e > line + strlen(line)) {
break;
}
if (!e) {
/* Write c */
WRITE(c);
goto next;
}
*e = '\0';
if (strstr(c, "PING") == c) {
char * t = strstr(c, ":");
fprintf(sock_w, "PONG %s\r\n", t);
fflush(sock_w);
goto next;
}
char * user, * command, * channel, * message;
user = c;
if (user[0] == ':') {
user++;
}
command = strstr(user, " ");
if (!command) {
WRITE("%s\n", user);
goto next;
}
command[0] = '\0';
command++;
channel = strstr(command, " ");
if (!channel) {
WRITE("%s %s\n", user, command);
goto next;
}
channel[0] = '\0';
channel++;
message = strstr(channel, " ");
if (message) {
message[0] = '\0';
message++;
if (message[0] == ':') {
message++;
}
}
int hr, min, sec;
get_time(&hr, &min, &sec);
if (!strcmp(command, "PRIVMSG")) {
if (!message) continue;
char * t = strstr(user, "!");
if (t) { t[0] = '\0'; }
t = strstr(user, "@");
if (t) { t[0] = '\0'; }
if (strstr(message, "\001ACTION ") == message) {
message = message + 8;
char * x = strstr(message, "\001");
if (x) *x = '\0';
WRITE(TIME_FMT " \002* \003%d%s\003\002 %s\n", TIME_ARGS, user_color(user), user, message);
} else {
WRITE(TIME_FMT " \00314<\003%d%s\00314>\003 %s\n", TIME_ARGS, user_color(user), user, message);
}
} else if (!strcmp(command, "332")) {
if (!message) {
continue;
}
/* Topic */
} else if (!strcmp(command, "JOIN")) {
char * t = strstr(user, "!");
if (t) { t[0] = '\0'; }
t = strstr(user, "@");
if (t) { t[0] = '\0'; }
if (channel[0] == ':') { channel++; }
WRITE(TIME_FMT " \00312-\003!\00312-\00311 %s\003 has joined \002%s\n", TIME_ARGS, user, channel);
} else if (!strcmp(command, "PART")) {
char * t = strstr(user, "!");
if (t) { t[0] = '\0'; }
t = strstr(user, "@");
if (t) { t[0] = '\0'; }
if (channel[0] == ':') { channel++; }
WRITE(TIME_FMT " \00312-\003!\00312\003-\00310 %s\003 has left \002%s\n", TIME_ARGS, user, channel);
} else if (!strcmp(command, "372")) {
WRITE(TIME_FMT " \00314%s\003 %s\n", TIME_ARGS, user, message ? message : "");
} else if (!strcmp(command, "376")) {
/* End of MOTD */
WRITE(TIME_FMT " \00314%s (end of MOTD)\n", TIME_ARGS, user);
} else {
WRITE(TIME_FMT " \00310%s %s %s %s\n", TIME_ARGS, user, command, channel, message ? message : "");
}
next:
if (!e) break;
c = e + 2;
}
}
static void redraw_buffer(char * buf) {
struct winsize w;
ioctl(0, TIOCGWINSZ, &w);
fprintf(stdout,"\033[%d;1H [%s] ", w.ws_row, channel ? channel : "(status)");
fprintf(stdout,"%s\033[K", buf);
fflush(stdout);
}
void handle_input(char * buf) {
fflush(stdout);
if (strstr(buf, "/help") == buf) {
WRITE("[help] help text goes here\n");
} else if (strstr(buf, "/quit") == buf) {
char * m = strstr(buf, " "); if (m) m++;
fprintf(sock_w, "QUIT :%s\r\n", m ? m : "https://gitlab.com/toaruos");
fflush(sock_w);
fprintf(stderr,"\033[0m\n");
set_buffered();
exit(0);
} else if (strstr(buf,"/part") == buf) {
if (!channel) {
fprintf(stderr, "Not in a channel.\n");
return;
}
char * m = strstr(buf, " "); if (m) m++;
fprintf(sock_w, "PART %s%s%s\r\n", channel, m ? " :" : "", m ? m : "");
fflush(sock_w);
free(channel);
channel = NULL;
} else if (strstr(buf,"/join ") == buf) {
char * m = strstr(buf, " "); if (m) m++;
fprintf(sock_w, "JOIN %s\r\n", m);
fflush(sock_w);
channel = strdup(m);
} else if (strstr(buf, "/") == buf) {
WRITE("[system] Unknown command: %s\n", buf);
} else {
int hr, min, sec;
get_time(&hr, &min, &sec);
WRITE("%02d:%02d:%02d \00314<\003\002%s\002\00314>\003 %s\n", hr, min, sec, nick, buf);
fprintf(sock_w, "PRIVMSG %s :%s\r\n", channel, buf);
}
redraw_buffer("");
}
int main(int argc, char * argv[]) {
/* Option parsing */
int c;
while ((c = getopt(argc, argv, "?hp:n:P:")) != -1) {
switch (c) {
case 'n':
nick = optarg;
break;
case 'P':
pass = optarg;
break;
case 'p':
port = atoi(optarg);
break;
case 'h':
case '?':
default:
show_usage(argc, argv);
break;
}
}
if (optind >= argc) {
show_usage(argc, argv);
}
host = argv[optind];
/* Connect */
{
char tmphost[512];
sprintf(tmphost, "/dev/net/%s:%d", host, port);
sock_fd = open(tmphost, O_RDWR);
if (sock_fd < 0) {
fprintf(stderr, "%s: Connection failed or network not available.\n", argv[0]);
return 1;
}
sock_r = fdopen(sock_fd, "r");
sock_w = fdopen(sock_fd, "w");
}
set_unbuffered();
fprintf(stdout, " - Toaru IRC v %s - \n", VERSION_STRING);
fprintf(stdout, " Copyright 2015-2018 K. Lange\n");
fprintf(stdout, " https://toaruos.org - https://gitlab.com/toaruos\n");
fprintf(stdout, " \n");
fprintf(stdout, " For help, type /help\n");
if (pass) {
fprintf(sock_w, "PASS %s\r\n", pass);
}
fprintf(sock_w, "NICK %s\r\nUSER %s * 0 :%s\r\n", nick, nick, nick);
fflush(sock_w);
int fds[] = {sock_fd, STDIN_FILENO, sock_fd};
char net_buf[2048];
memset(net_buf, 0, 2048);
int net_buf_p = 0;
char buf[1024] = {0};
int buf_p = 0;
while (1) {
int index = fswait2(2,fds,200);
if (index == 1) {
/* stdin */
int c = fgetc(stdin);
if (c < 0) {
continue;
}
if (c == 0x08) {
/* Remove from buffer */
if (buf_p) {
buf[buf_p-1] = '\0';
buf_p--;
redraw_buffer(buf);
}
} else if (c == '\n') {
/* Send buffer */
handle_input(buf);
memset(buf, 0, 1024);
buf_p = 0;
} else {
/* Append buffer, or check special keys */
buf[buf_p] = c;
buf_p++;
redraw_buffer(buf);
}
} else if (index == 0) {
/* network */
do {
int c = fgetc(sock_r);
if (c < 0) continue;
net_buf[net_buf_p] = c;
net_buf_p++;
if (c == '\n' || net_buf_p == 2046) {
handle(net_buf);
net_buf_p = 0;
memset(net_buf, 0, 2048);
redraw_buffer(buf);
}
} while (!_fwouldblock(sock_r));
} else {
/* timer */
}
}
}
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