catboy/handle.c

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6.1 KiB
C
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/* 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 <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;
}
typedef void (*Handler)(char *prefix, char *params);
static char *prift(char **prefix) {
return strsep(prefix, "!@");
}
static char *shift(char **params) {
char *rest = *params;
if (!rest) errx(EX_PROTOCOL, "unexpected eol");
if (rest[0] == ':') {
*params = NULL;
return &rest[1];
}
return strsep(params, " ");
}
static void handlePing(char *prefix, char *params) {
(void)prefix;
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ircFmt("PONG %s\r\n", params);
}
static void handle432(char *prefix, char *params) {
(void)prefix;
shift(&params);
shift(&params);
char *mesg = shift(&params);
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uiLog("You can't use that name here");
uiFmt("Sheriff says, \"%s\"", mesg);
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uiLog("Type /nick <name> to choose a new one");
}
static void handle001(char *prefix, char *params) {
(void)prefix;
char *nick = shift(&params);
if (strcmp(nick, chat.nick)) {
free(chat.nick);
chat.nick = strdup(nick);
}
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ircFmt("JOIN %s\r\n", chat.chan);
}
static void handleJoin(char *prefix, char *params) {
char *nick = prift(&prefix);
char *user = prift(&prefix);
char *chan = shift(&params);
if (!strcmp(nick, chat.nick) && strcmp(user, chat.user)) {
free(chat.user);
chat.user = strdup(user);
}
uiFmt(
"\3%d%s\3 arrives in \3%d%s\3",
color(user), nick, color(chan), chan
);
}
static void handlePart(char *prefix, char *params) {
char *nick = prift(&prefix);
char *user = prift(&prefix);
char *chan = shift(&params);
char *mesg = shift(&params);
uiFmt(
"\3%d%s\3 leaves \3%d%s\3, \"%s\"",
color(user), nick, color(chan), chan, mesg
);
}
static void handleQuit(char *prefix, char *params) {
char *nick = prift(&prefix);
char *user = prift(&prefix);
char *mesg = shift(&params);
char *quot = (mesg[0] == '"') ? "" : "\"";
uiFmt(
"\3%d%s\3 leaves, %s%s%s",
color(user), nick, quot, mesg, quot
);
}
static void handleKick(char *prefix, char *params) {
char *nick = prift(&prefix);
char *user = prift(&prefix);
char *chan = shift(&params);
char *kick = shift(&params);
char *mesg = shift(&params);
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
);
}
static void handle332(char *prefix, char *params) {
(void)prefix;
shift(&params);
char *chan = shift(&params);
char *topic = shift(&params);
uiFmt(
"The sign in \3%d%s\3 reads, \"%s\"",
color(chan), chan, topic
);
uiTopic(topic);
}
static void handleTopic(char *prefix, char *params) {
char *nick = prift(&prefix);
char *user = prift(&prefix);
char *chan = shift(&params);
char *topic = shift(&params);
uiFmt(
"\3%d%s\3 places a new sign in \3%d%s\3, \"%s\"",
color(user), nick, color(chan), chan, topic
);
uiTopic(topic);
}
static void handle366(char *prefix, char *params) {
(void)prefix;
shift(&params);
char *chan = shift(&params);
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ircFmt("WHO %s\r\n", chan);
}
static char whoBuf[4096];
static size_t whoLen;
static void handle352(char *prefix, char *params) {
(void)prefix;
shift(&params);
shift(&params);
char *user = shift(&params);
shift(&params);
shift(&params);
char *nick = shift(&params);
whoLen += snprintf(
&whoBuf[whoLen], sizeof(whoBuf) - whoLen,
"%s\3%d%s\3",
(whoLen ? ", " : ""), color(user), nick
);
}
static void handle315(char *prefix, char *params) {
(void)prefix;
shift(&params);
char *chan = shift(&params);
whoLen = 0;
uiFmt(
"In \3%d%s\3 are %s",
color(chan), chan, whoBuf
);
}
static void handleNick(char *prefix, char *params) {
char *prev = prift(&prefix);
char *user = prift(&prefix);
char *next = shift(&params);
if (!strcmp(user, chat.user)) {
free(chat.nick);
chat.nick = strdup(next);
}
uiFmt(
"\3%d%s\3 is now known as \3%d%s\3",
color(user), prev, color(user), next
);
}
static void handlePrivmsg(char *prefix, char *params) {
char *nick = prift(&prefix);
char *user = prift(&prefix);
shift(&params);
char *mesg = shift(&params);
if (mesg[0] == '\1') {
strsep(&mesg, " ");
uiFmt("* \3%d%s\3 %s", color(user), nick, strsep(&mesg, "\1"));
} else {
uiFmt("<\3%d%s\3> %s", color(user), nick, mesg);
}
}
static void handleNotice(char *prefix, char *params) {
char *nick = prift(&prefix);
char *user = prift(&prefix);
char *chan = shift(&params);
char *mesg = shift(&params);
if (strcmp(chat.chan, chan)) return;
uiFmt("-\3%d%s\3- %s", color(user), nick, 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;
}
}