catboy/handle.c

320 lines
7.6 KiB
C

/* Copyright (C) 2018 Curtis McEnroe <june@causal.agency>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <err.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include "chat.h"
static int color(const char *s) {
if (!s) return 0;
int x = 0;
for (; s[0]; ++s) {
x ^= s[0];
}
x &= 15;
return (x == 1) ? 0 : x;
}
static char *paramField(char **params) {
char *rest = *params;
if (rest[0] == ':') {
*params = NULL;
return &rest[1];
}
return strsep(params, " ");
}
static void shift(
char *prefix, char **nick, char **user, char **host,
char *params, size_t req, size_t opt, /* (char **) */ ...
) {
char *field;
if (prefix) {
field = strsep(&prefix, "!");
if (nick) *nick = field;
field = strsep(&prefix, "@");
if (user) *user = field;
if (host) *host = prefix;
}
va_list ap;
va_start(ap, opt);
for (size_t i = 0; i < req; ++i) {
if (!params) {
va_end(ap);
errx(EX_PROTOCOL, "%zu params required, found %zu", req, i);
}
field = paramField(&params);
char **param = va_arg(ap, char **);
if (param) *param = field;
}
for (size_t i = 0; i < opt; ++i) {
char **param = va_arg(ap, char **);
if (params) {
*param = paramField(&params);
} else {
*param = NULL;
}
}
va_end(ap);
}
typedef void (*Handler)(char *prefix, char *params);
static void handlePing(char *prefix, char *params) {
(void)prefix;
ircFmt("PONG %s\r\n", params);
}
static void handle432(char *prefix, char *params) {
char *mesg;
shift(prefix, NULL, NULL, NULL, params, 1, 0, &mesg);
uiLog(L"You can't use that name here");
uiFmt("Sheriff says, \"%s\"", mesg);
uiLog(L"Type /nick <name> to choose a new one");
}
static void handle001(char *prefix, char *params) {
char *nick;
shift(prefix, NULL, NULL, NULL, params, 1, 0, &nick);
if (strcmp(nick, chat.nick)) {
free(chat.nick);
chat.nick = strdup(nick);
}
ircFmt("JOIN %s\r\n", chat.chan);
}
static void handleJoin(char *prefix, char *params) {
char *nick, *user, *chan;
shift(prefix, &nick, &user, NULL, params, 1, 0, &chan);
uiFmt(
"\3%d%s\3 arrives in \3%d%s\3",
color(user), nick, color(chan), chan
);
if (!strcmp(nick, chat.nick) && strcmp(user, chat.user)) {
free(chat.user);
chat.user = strdup(user);
}
tabTouch(nick);
}
static void handlePart(char *prefix, char *params) {
char *nick, *user, *chan, *mesg;
shift(prefix, &nick, &user, NULL, params, 1, 1, &chan, &mesg);
if (mesg) {
uiFmt(
"\3%d%s\3 leaves \3%d%s\3, \"%s\"",
color(user), nick, color(chan), chan, mesg
);
} else {
uiFmt(
"\3%d%s\3 leaves \3%d%s\3",
color(user), nick, color(chan), chan
);
}
tabRemove(nick);
}
static void handleQuit(char *prefix, char *params) {
char *nick, *user, *mesg;
shift(prefix, &nick, &user, NULL, params, 0, 1, &mesg);
if (mesg) {
char *quot = (mesg[0] == '"') ? "" : "\"";
uiFmt(
"\3%d%s\3 leaves, %s%s%s",
color(user), nick, quot, mesg, quot
);
} else {
uiFmt("\3%d%s\3 leaves", color(user), nick);
}
tabRemove(nick);
}
static void handleKick(char *prefix, char *params) {
char *nick, *user, *chan, *kick, *mesg;
shift(prefix, &nick, &user, NULL, params, 2, 1, &chan, &kick, &mesg);
if (mesg) {
uiFmt(
"\3%d%s\3 kicks \3%d%s\3 out of \3%d%s\3, \"%s\"",
color(user), nick, color(kick), kick, color(chan), chan, mesg
);
} else {
uiFmt(
"\3%d%s\3 kicks \3%d%s\3 out of \3%d%s\3",
color(user), nick, color(kick), kick, color(chan), chan
);
}
tabRemove(nick);
}
static void handle332(char *prefix, char *params) {
char *chan, *topic;
shift(prefix, NULL, NULL, NULL, params, 3, 0, NULL, &chan, &topic);
uiFmt(
"The sign in \3%d%s\3 reads, \"%s\"",
color(chan), chan, topic
);
urlScan(topic);
uiTopicStr(topic);
}
static void handleTopic(char *prefix, char *params) {
char *nick, *user, *chan, *topic;
shift(prefix, &nick, &user, NULL, params, 2, 0, &chan, &topic);
uiFmt(
"\3%d%s\3 places a new sign in \3%d%s\3, \"%s\"",
color(user), nick, color(chan), chan, topic
);
urlScan(topic);
uiTopicStr(topic);
}
static void handle366(char *prefix, char *params) {
char *chan;
shift(prefix, NULL, NULL, NULL, params, 2, 0, NULL, &chan);
ircFmt("WHO %s\r\n", chan);
}
static struct {
char buf[4096];
size_t len;
} who;
static void handle352(char *prefix, char *params) {
char *user, *nick;
shift(
prefix, NULL, NULL, NULL,
params, 6, 0, NULL, NULL, &user, NULL, NULL, &nick
);
size_t cap = sizeof(who.buf) - who.len;
int len = snprintf(
&who.buf[who.len], cap,
"%s\3%d%s\3",
(who.len ? ", " : ""), color(user), nick
);
if ((size_t)len < cap) who.len += len;
tabTouch(nick);
}
static void handle315(char *prefix, char *params) {
char *chan;
shift(prefix, NULL, NULL, NULL, params, 2, 0, NULL, &chan);
uiFmt(
"In \3%d%s\3 are %s",
color(chan), chan, who.buf
);
who.len = 0;
}
static void handleNick(char *prefix, char *params) {
char *prev, *user, *next;
shift(prefix, &prev, &user, NULL, params, 1, 0, &next);
uiFmt(
"\3%d%s\3 is now known as \3%d%s\3",
color(user), prev, color(user), next
);
if (!strcmp(user, chat.user)) {
free(chat.nick);
chat.nick = strdup(next);
}
tabReplace(prev, next);
}
static void handleCTCP(char *nick, char *user, char *mesg) {
mesg = &mesg[1];
char *ctcp = strsep(&mesg, " ");
char *params = strsep(&mesg, "\1");
if (strcmp(ctcp, "ACTION")) return;
uiFmt(
"* \3%d%s\3 %s",
color(user), nick, params
);
if (strcmp(user, chat.user)) tabTouch(nick);
urlScan(params);
}
static void handlePrivmsg(char *prefix, char *params) {
char *nick, *user, *mesg;
shift(prefix, &nick, &user, NULL, params, 2, 0, NULL, &mesg);
if (mesg[0] == '\1') {
handleCTCP(nick, user, mesg);
return;
}
bool self = !strcmp(user, chat.user);
bool ping = !strncasecmp(mesg, chat.nick, strlen(chat.nick));
uiFmt(
"%c%c\3%d%s\17%c %s",
self["<["], ping["\17\26"], color(user), nick, self[">]"], mesg
);
if (!self) tabTouch(nick);
if (ping) uiBeep();
urlScan(mesg);
}
static void handleNotice(char *prefix, char *params) {
char *nick, *user, *chan, *mesg;
shift(prefix, &nick, &user, NULL, params, 2, 0, &chan, &mesg);
if (strcmp(chan, chat.chan)) return;
uiFmt(
"-\3%d%s\3- %s",
color(user), nick, mesg
);
tabTouch(nick);
urlScan(mesg);
}
static const struct {
const char *command;
Handler handler;
} HANDLERS[] = {
{ "001", handle001 },
{ "315", handle315 },
{ "332", handle332 },
{ "352", handle352 },
{ "366", handle366 },
{ "432", handle432 },
{ "433", handle432 },
{ "JOIN", handleJoin },
{ "KICK", handleKick },
{ "NICK", handleNick },
{ "NOTICE", handleNotice },
{ "PART", handlePart },
{ "PING", handlePing },
{ "PRIVMSG", handlePrivmsg },
{ "QUIT", handleQuit },
{ "TOPIC", handleTopic },
};
static const size_t HANDLERS_LEN = sizeof(HANDLERS) / sizeof(HANDLERS[0]);
void handle(char *line) {
char *prefix = NULL;
if (line[0] == ':') {
prefix = strsep(&line, " ") + 1;
if (!line) errx(EX_PROTOCOL, "unexpected eol");
}
char *command = strsep(&line, " ");
for (size_t i = 0; i < HANDLERS_LEN; ++i) {
if (strcmp(command, HANDLERS[i].command)) continue;
HANDLERS[i].handler(prefix, line);
break;
}
}