Index: cmd.c
===================================================================
--- cmd.c	(revision cd7b81d00d1c21d57d2116b0632deb5a69c27ccc)
+++ cmd.c	(revision cd7b81d00d1c21d57d2116b0632deb5a69c27ccc)
@@ -0,0 +1,236 @@
+/*
+ * Copyright (c) 2009, 2010 Mike Belopuhov
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef lint
+static const char rcsid[] = "$ABSD: cmd.c,v 1.21 2010/01/03 20:54:18 kmerz Exp $";
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/queue.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <unistd.h>
+#include <event.h>
+
+#include "icb.h"
+
+extern int creategroups;
+
+void icb_cmd_boot(struct icb_session *, char *);
+void icb_cmd_change(struct icb_session *, char *);
+void icb_cmd_name(struct icb_session *, char *);
+void icb_cmd_personal(struct icb_session *, char *);
+void icb_cmd_pass(struct icb_session *, char *);
+void icb_cmd_topic(struct icb_session *, char *);
+void icb_cmd_who(struct icb_session *, char *);
+
+void *
+icb_cmd_lookup(char *cmd)
+{
+	struct {
+		const char	*cmd;
+		void		(*handler)(struct icb_session *, char *);
+	} cmdtab[] = {
+		{ "boot",	icb_cmd_boot },
+		{ "g",		icb_cmd_change },
+		{ "m",		icb_cmd_personal },
+		{ "msg",	icb_cmd_personal },
+		{ "name",	icb_cmd_name },
+		{ "pass",	icb_cmd_pass },
+		{ "topic",	icb_cmd_topic },
+		{ "w",		icb_cmd_who },
+		{ NULL,		NULL }
+	};
+	int i;
+
+	for (i = 0; cmdtab[i].cmd != NULL; i++)
+		if (strcasecmp(cmdtab[i].cmd, cmd) == 0)
+			return (cmdtab[i].handler);
+	return (NULL);
+}
+
+void
+icb_cmd_boot(struct icb_session *is, char *arg)
+{
+	struct icb_group *ig;
+	struct icb_session *s;
+
+	/* to boot or not to boot, that is the question */
+	ig = is->group;
+	if (!icb_ismoder(ig, is)) {
+		icb_status(is, STATUS_NOTIFY, "Sorry, booting is a privilege "
+		    "you don't possess");
+		return;
+	}
+
+	/* who would be a target then? */
+	LIST_FOREACH(s, &ig->sess, entry) {
+		if (strcmp(s->nick, arg) == 0)
+			break;
+	}
+	if (s == NULL) {
+		icb_status(is, STATUS_NOTIFY, "No such user");
+		return;
+	}
+
+	/* okay, here we go, but first, be polite and notify a user */
+	icb_status(s, STATUS_BOOT, "%s booted you", is->nick);
+	icb_status_group(s->group, s, STATUS_BOOT, "%s was booted", s->nick);
+	icb_drop(s, "booted");
+}
+
+void
+icb_cmd_change(struct icb_session *is, char *arg)
+{
+	struct icb_group *ig;
+	struct icb_session *s;
+	int changing = 0;
+
+	if (strlen(arg) == 0) {
+		icb_error(is, "Invalid group");
+		return;
+	}
+
+	LIST_FOREACH(ig, &groups, entry) {
+		if (strcmp(ig->name, arg) == 0)
+			break;
+	}
+	if (ig == NULL) {
+		if (!creategroups) {
+			icb_error(is, "Invalid group");
+			return;
+		} else {
+			if ((ig = icb_addgroup(is, arg, NULL)) == NULL) {
+				icb_error(is, "Can't create group");
+				return;
+			}
+			icb_log(NULL, LOG_DEBUG, "%s created group %s",
+			    is->nick, arg);
+		}
+	}
+
+	/* changing to the same group is strictly prohibited */
+	if (is->group && is->group == ig) {
+		icb_error(is, "Huh?");
+		return;
+	}
+
+	LIST_FOREACH(s, &ig->sess, entry) {
+		if (strcmp(s->nick, is->nick) == 0) {
+			icb_error(is, "Nick is already in use");
+			return;
+		}
+	}
+
+	if (is->group) {
+		changing = 1;
+		if (icb_ismoder(is->group, is))
+			(void)icb_pass(is->group, is, NULL);
+		LIST_REMOVE(is, entry);
+		icb_status_group(is->group, NULL, STATUS_DEPART,
+		    "%s (%s@%s) just left", is->nick, is->client, is->host);
+	}
+
+	is->group = ig;
+	LIST_INSERT_HEAD(&ig->sess, is, entry);
+
+	/* notify group */
+	icb_status_group(ig, is, changing ? STATUS_ARRIVE : STATUS_SIGNON,
+	    "%s (%s@%s) entered group", is->nick, is->client, is->host);
+
+	/* acknowledge successful join */
+	icb_status(is, STATUS_STATUS, "You are now in group %s%s", ig->name,
+	    icb_ismoder(ig, is) ? " as moderator" : "");
+
+	/* send user a topic name */
+	if (strlen(ig->topic) > 0)
+		icb_status(is, STATUS_TOPIC, "The topic is: %s", ig->topic);
+}
+
+void
+icb_cmd_name(struct icb_session *is, char *arg)
+{
+	struct icb_group *ig = is->group;
+	struct icb_session *s;
+
+	if (strlen(arg) == 0) {
+		icb_status(is, STATUS_NAME, "Your nickname is %s",
+		    is->nick);
+		return;
+	}
+	if (strcasecmp(arg, "admin") == 0) {
+		icb_error(is, "Wuff wuff!");
+		return;
+	}
+	/* sanitize user input */
+	if (strlen(arg) > ICB_MAXNICKLEN)
+		arg[ICB_MAXNICKLEN - 1] = '\0';
+	LIST_FOREACH(s, &ig->sess, entry) {
+		if (strcmp(s->nick, arg) == 0) {
+			icb_error(is, "Nick is already in use");
+			return;
+		}
+	}
+	icb_status_group(ig, NULL, STATUS_NAME,
+	    "%s changed nickname to %s", is->nick, arg);
+	strlcpy(is->nick, arg, sizeof is->nick);
+}
+
+void
+icb_cmd_personal(struct icb_session *is, char *arg)
+{
+	char *p;
+
+	if ((p = strchr(arg, ' ')) == 0) {
+		icb_error(is, "Empty message");
+		return;
+	}
+	*p = '\0';
+	icb_privmsg(is, arg, ++p);
+}
+
+void
+icb_cmd_pass(struct icb_session *is, char *arg __attribute__((unused)))
+{
+	if (!icb_ismoder(is->group, is))
+		(void)icb_pass(is->group, is->group->moder, is);
+}
+
+void
+icb_cmd_topic(struct icb_session *is, char *arg)
+{
+	struct icb_group *ig = is->group;
+
+	if (strlen(arg) == 0) {	/* querying the topic */
+		if (strlen(ig->topic) > 0)
+			icb_status(is, STATUS_TOPIC, "The topic is: %s",
+			    ig->topic);
+		else
+			icb_status(is, STATUS_TOPIC, "The topic is not set.");
+	} else {		/* setting the topic */
+		strlcpy(ig->topic, arg, sizeof ig->topic);
+		icb_status_group(ig, NULL, STATUS_TOPIC,
+		    "%s changed the topic to \"%s\"", is->nick, ig->topic);
+	}
+}
+
+void
+icb_cmd_who(struct icb_session *is, char *arg __attribute__((unused)))
+{
+	icb_who(is, NULL);
+}
