From 96f4b81182f15a8a209ffe3ad023f67583999e3c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C5=99emysl=20Janouch?= <p.janouch@gmail.com>
Date: Sat, 2 Aug 2014 23:31:41 +0200
Subject: [PATCH] kike: implement LIST

---
 src/common.c |  6 +++---
 src/kike.c   | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 56 insertions(+), 3 deletions(-)

diff --git a/src/common.c b/src/common.c
index 2593cdc..5a505b2 100644
--- a/src/common.c
+++ b/src/common.c
@@ -634,7 +634,7 @@ str_map_iter_init (struct str_map_iter *self, struct str_map *map)
 	self->link = NULL;
 }
 
-static bool
+static void *
 str_map_iter_next (struct str_map_iter *self)
 {
 	struct str_map *map = self->map;
@@ -643,10 +643,10 @@ str_map_iter_next (struct str_map_iter *self)
 	while (!self->link)
 	{
 		if (self->next_index >= map->len)
-			return false;
+			return NULL;
 		self->link = map->map[self->next_index++];
 	}
-	return true;
+	return self->link->data;
 }
 
 static uint64_t
diff --git a/src/kike.c b/src/kike.c
index b1f4f62..2a1744e 100644
--- a/src/kike.c
+++ b/src/kike.c
@@ -325,6 +325,8 @@ struct channel
 	char *key;                          ///< Channel key
 	long user_limit;                    ///< User limit or -1
 
+	char *topic;                        ///< Channel topic
+
 	struct channel_user *users;         ///< Channel users
 
 	struct str_vector ban_list;         ///< Ban list
@@ -347,6 +349,7 @@ channel_free (struct channel *self)
 {
 	free (self->name);
 	free (self->key);
+	free (self->topic);
 
 	struct channel_user *link, *tmp;
 	for (link = self->users; link; link = tmp)
@@ -627,6 +630,8 @@ enum
 	IRC_RPL_LUSERME               = 255,
 
 	IRC_RPL_USERHOST              = 302,
+	IRC_RPL_LIST                  = 322,
+	IRC_RPL_LISTEND               = 323,
 	IRC_RPL_VERSION               = 351,
 	IRC_RPL_MOTD                  = 372,
 	IRC_RPL_MOTDSTART             = 375,
@@ -662,6 +667,8 @@ static const char *g_default_replies[] =
 	[IRC_RPL_LUSERME] = ":I have %d clients and %d servers",
 
 	[IRC_RPL_USERHOST] = ":%s",
+	[IRC_RPL_LIST] = "%s %d :%s",
+	[IRC_RPL_LISTEND] = ":End of LIST",
 	[IRC_RPL_VERSION] = "%s.%d %s :%s",
 	[IRC_RPL_MOTD] = ":- %s",
 	[IRC_RPL_MOTDSTART] = ":- %s Message of the day - ",
@@ -998,6 +1005,51 @@ irc_handle_privmsg (const struct irc_message *msg, struct client *c)
 	}
 }
 
+static void
+irc_send_rpl_list (struct client *c, const struct channel *chan)
+{
+	int visible = 0;
+	for (struct channel_user *user = chan->users;
+		 user; user = user->next)
+		visible++;
+
+	irc_send_reply (c, IRC_RPL_LIST, chan->name, visible, chan->topic);
+}
+
+static void
+irc_handle_list (const struct irc_message *msg, struct client *c)
+{
+	if (msg->params.len > 1 && !irc_is_this_me (c->ctx, msg->params.vector[1]))
+	{
+		irc_send_reply (c, IRC_ERR_NOSUCHSERVER, msg->params.vector[1]);
+		return;
+	}
+
+	struct channel *chan;
+	if (msg->params.len == 0)
+	{
+		struct str_map_iter iter;
+		str_map_iter_init (&iter, &c->ctx->channels);
+		while ((chan = str_map_iter_next (&iter)))
+			if (!(chan->modes & (IRC_CHAN_MODE_PRIVATE | IRC_CHAN_MODE_SECRET))
+			 || client_on_channel (c, chan))
+				irc_send_rpl_list (c, chan);
+	}
+	else
+	{
+		struct str_vector channels;
+		str_vector_init (&channels);
+		split_str_ignore_empty (msg->params.vector[0], ',', &channels);
+		for (size_t i = 0; i < channels.len; i++)
+			if ((chan = str_map_find (&c->ctx->channels, channels.vector[i]))
+			 && (!(chan->modes & IRC_CHAN_MODE_SECRET)
+			 || client_on_channel (c, chan)))
+				irc_send_rpl_list (c, chan);
+		str_vector_free (&channels);
+	}
+	irc_send_reply (c, IRC_RPL_LISTEND);
+}
+
 // -----------------------------------------------------------------------------
 
 struct irc_command
@@ -1028,6 +1080,7 @@ irc_register_handlers (struct server_context *ctx)
 		{ "VERSION",  true,  irc_handle_version  },
 
 		{ "PRIVMSG",  true,  irc_handle_privmsg  },
+		{ "LIST",     true,  irc_handle_list     },
 	};
 
 	for (size_t i = 0; i < N_ELEMENTS (message_handlers); i++)