1 files changed, 280 insertions, 0 deletions
diff --git a/command.c b/command.c
new file mode 100644
index 0000000..5cb43cf
--- /dev/null
+++ b/command.c
@@ -0,0 +1,280 @@
+/* Copyright (C) 2020  C. McEnroe <june@causal.agency>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "chat.h"
+
+typedef void Command(size_t id, char *params);
+
+static void commandDebug(size_t id, char *params) {
+	(void)id;
+	(void)params;
+	self.debug ^= true;
+	uiFormat(
+		Debug, Warm, NULL,
+		"\3%dDebug is %s", Gray, (self.debug ? "on" : "off")
+	);
+}
+
+static void commandQuote(size_t id, char *params) {
+	(void)id;
+	if (params) ircFormat("%s\r\n", params);
+}
+
+static void commandPrivmsg(size_t id, char *params) {
+	if (!params || !params[0]) return;
+	ircFormat("PRIVMSG %s :%s\r\n", idNames[id], params);
+	struct Message msg = {
+		.nick = self.nick,
+		.user = self.user,
+		.cmd = "PRIVMSG",
+		.params[0] = idNames[id],
+		.params[1] = params,
+	};
+	handle(msg);
+}
+
+static void commandNotice(size_t id, char *params) {
+	if (!params || !params[0]) return;
+	ircFormat("NOTICE %s :%s\r\n", idNames[id], params);
+	struct Message msg = {
+		.nick = self.nick,
+		.user = self.user,
+		.cmd = "NOTICE",
+		.params[0] = idNames[id],
+		.params[1] = params,
+	};
+	handle(msg);
+}
+
+static void commandMe(size_t id, char *params) {
+	char buf[512];
+	snprintf(buf, sizeof(buf), "\1ACTION %s\1", (params ? params : ""));
+	commandPrivmsg(id, buf);
+}
+
+static void commandMsg(size_t id, char *params) {
+	(void)id;
+	char *nick = strsep(&params, " ");
+	if (!params) return;
+	commandPrivmsg(idFor(nick), params);
+}
+
+static void commandJoin(size_t id, char *params) {
+	size_t count = 1;
+	if (params) {
+		for (char *ch = params; *ch && *ch != ' '; ++ch) {
+			if (*ch == ',') count++;
+		}
+	}
+	ircFormat("JOIN %s\r\n", (params ? params : idNames[id]));
+	replies.join += count;
+	replies.topic += count;
+	replies.names += count;
+}
+
+static void commandPart(size_t id, char *params) {
+	if (params) {
+		ircFormat("PART %s :%s\r\n", idNames[id], params);
+	} else {
+		ircFormat("PART %s\r\n", idNames[id]);
+	}
+}
+
+static void commandQuit(size_t id, char *params) {
+	(void)id;
+	set(&self.quit, (params ? params : "Goodbye"));
+}
+
+static void commandNick(size_t id, char *params) {
+	(void)id;
+	if (!params) return;
+	ircFormat("NICK :%s\r\n", params);
+}
+
+static void commandTopic(size_t id, char *params) {
+	if (params) {
+		ircFormat("TOPIC %s :%s\r\n", idNames[id], params);
+	} else {
+		ircFormat("TOPIC %s\r\n", idNames[id]);
+		replies.topic++;
+	}
+}
+
+static void commandNames(size_t id, char *params) {
+	(void)params;
+	ircFormat("NAMES :%s\r\n", idNames[id]);
+	replies.names++;
+}
+
+static void commandWhois(size_t id, char *params) {
+	(void)id;
+	if (!params) return;
+	ircFormat("WHOIS :%s\r\n", params);
+	replies.whois++;
+}
+
+static void commandQuery(size_t id, char *params) {
+	if (!params) return;
+	size_t query = idFor(params);
+	idColors[query] = completeColor(id, params);
+	uiShowID(query);
+}
+
+static void commandWindow(size_t id, char *params) {
+	if (!params) return;
+	if (isdigit(params[0])) {
+		uiShowNum(strtoul(params, NULL, 10));
+	} else {
+		id = idFind(params);
+		if (id) uiShowID(id);
+	}
+}
+
+static void commandClose(size_t id, char *params) {
+	if (!params) {
+		uiCloseID(id);
+	} else if (isdigit(params[0])) {
+		uiCloseNum(strtoul(params, NULL, 10));
+	} else {
+		id = idFind(params);
+		if (id) uiCloseID(id);
+	}
+}
+
+static void commandOpen(size_t id, char *params) {
+	if (!params) {
+		urlOpenCount(id, 1);
+	} else if (isdigit(params[0])) {
+		urlOpenCount(id, strtoul(params, NULL, 10));
+	} else {
+		urlOpenMatch(id, params);
+	}
+}
+
+static void commandCopy(size_t id, char *params) {
+	urlCopyMatch(id, params);
+}
+
+static void commandHelp(size_t id, char *params) {
+	(void)id;
+	uiHide();
+
+	pid_t pid = fork();
+	if (pid < 0) err(EX_OSERR, "fork");
+	if (pid) return;
+
+	char buf[256];
+	snprintf(buf, sizeof(buf), "ip%s$", (params ? params : "COMMANDS"));
+	setenv("LESS", buf, 1);
+	execlp("man", "man", "1", "catgirl", NULL);
+	dup2(procPipe[1], STDERR_FILENO);
+	warn("man");
+	_exit(EX_UNAVAILABLE);
+}
+
+static const struct Handler {
+	const char *cmd;
+	Command *fn;
+} Commands[] = {
+	{ "/close", commandClose },
+	{ "/copy", commandCopy },
+	{ "/debug", commandDebug },
+	{ "/help", commandHelp },
+	{ "/join", commandJoin },
+	{ "/me", commandMe },
+	{ "/msg", commandMsg },
+	{ "/names", commandNames },
+	{ "/nick", commandNick },
+	{ "/notice", commandNotice },
+	{ "/open", commandOpen },
+	{ "/part", commandPart },
+	{ "/query", commandQuery },
+	{ "/quit", commandQuit },
+	{ "/quote", commandQuote },
+	{ "/topic", commandTopic },
+	{ "/whois", commandWhois },
+	{ "/window", commandWindow },
+};
+
+static int compar(const void *cmd, const void *_handler) {
+	const struct Handler *handler = _handler;
+	return strcmp(cmd, handler->cmd);
+}
+
+const char *commandIsPrivmsg(size_t id, const char *input) {
+	if (id == Network || id == Debug) return NULL;
+	if (input[0] != '/') return input;
+	const char *space = strchr(&input[1], ' ');
+	const char *slash = strchr(&input[1], '/');
+	if (slash && (!space || slash < space)) return input;
+	return NULL;
+}
+
+const char *commandIsNotice(size_t id, const char *input) {
+	if (id == Network || id == Debug) return NULL;
+	if (strncmp(input, "/notice ", 8)) return NULL;
+	return &input[8];
+}
+
+const char *commandIsAction(size_t id, const char *input) {
+	if (id == Network || id == Debug) return NULL;
+	if (strncmp(input, "/me ", 4)) return NULL;
+	return &input[4];
+}
+
+void command(size_t id, char *input) {
+	if (id == Debug && input[0] != '/') {
+		commandQuote(id, input);
+	} else if (commandIsPrivmsg(id, input)) {
+		commandPrivmsg(id, input);
+	} else if (input[0] == '/' && isdigit(input[1])) {
+		commandWindow(id, &input[1]);
+	} else {
+		const char *cmd = strsep(&input, " ");
+		const char *unique = complete(None, cmd);
+		if (unique && !complete(None, cmd)) {
+			cmd = unique;
+			completeReject();
+		}
+		const struct Handler *handler = bsearch(
+			cmd, Commands, ARRAY_LEN(Commands), sizeof(*handler), compar
+		);
+		if (handler) {
+			if (input) {
+				input += strspn(input, " ");
+				size_t len = strlen(input);
+				while (input[len - 1] == ' ') input[--len] = '\0';
+				if (!input[0]) input = NULL;
+			}
+			if (input && !input[0]) input = NULL;
+			handler->fn(id, input);
+		} else {
+			uiFormat(id, Hot, NULL, "No such command %s", cmd);
+		}
+	}
+}
+
+void commandComplete(void) {
+	for (size_t i = 0; i < ARRAY_LEN(Commands); ++i) {
+		completeAdd(None, Commands[i].cmd, Default);
+	}
+}