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Diffstat (limited to 'handle.c')
| -rw-r--r-- | handle.c | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/handle.c b/handle.c new file mode 100644 index 0000000..ba3cb00 --- /dev/null +++ b/handle.c @@ -0,0 +1,255 @@ +/* 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; + clientFmt("PONG %s\r\n", params); +} + +static void handle432(char *prefix, char *params) { + (void)prefix; + shift(¶ms); + shift(¶ms); + char *mesg = shift(¶ms); + uiChat("You can't use that name here"); + uiFmt("Sheriff says, \"%s\"", mesg); + uiChat("Type /nick <name> to choose a new one"); +} + +static void handle001(char *prefix, char *params) { + (void)prefix; + char *nick = shift(¶ms); + if (strcmp(nick, chat.nick)) { + free(chat.nick); + chat.nick = strdup(nick); + } + clientFmt("JOIN %s\r\n", chat.chan); +} + +static void handleJoin(char *prefix, char *params) { + char *nick = prift(&prefix); + char *user = prift(&prefix); + char *chan = shift(¶ms); + 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(¶ms); + char *mesg = shift(¶ms); + 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(¶ms); + 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(¶ms); + char *kick = shift(¶ms); + char *mesg = shift(¶ms); + 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(¶ms); + char *chan = shift(¶ms); + char *topic = shift(¶ms); + 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(¶ms); + char *topic = shift(¶ms); + 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(¶ms); + char *chan = shift(¶ms); + clientFmt("WHO %s\r\n", chan); +} + +static char whoBuf[4096]; +static size_t whoLen; + +static void handle352(char *prefix, char *params) { + (void)prefix; + shift(¶ms); + shift(¶ms); + char *user = shift(¶ms); + shift(¶ms); + shift(¶ms); + char *nick = shift(¶ms); + 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(¶ms); + char *chan = shift(¶ms); + 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(¶ms); + 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(¶ms); + char *mesg = shift(¶ms); + 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(¶ms); + char *mesg = shift(¶ms); + 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; + } +} |