xC/xP: relay and render channel modes

1 files changed, 71 insertions, 31 deletions

diff --git a/xC.c b/xC.c
index 38f2c00..77d2a08 100644
--- a/xC.c
+++ b/xC.c
@@ -1841,7 +1841,7 @@ struct server
 
 	struct user *irc_user;              ///< Our own user
 	int nick_counter;                   ///< Iterates "nicks" when registering
-	struct str irc_user_mode;           ///< Our current user modes
+	struct str irc_user_modes;          ///< Our current user modes
 	char *irc_user_host;                ///< Our current user@host
 	bool autoaway_active;               ///< Autoaway is currently active
 
@@ -1889,7 +1889,7 @@ static struct ispect_field g_server_ispect[] =
 	// TODO: either rename the underlying field or fix the plugins
 	{ "user",      offsetof (struct server, irc_user),
 	  ISPECT_REF, 0, g_user_ispect, false },
-	{ "user_mode", offsetof (struct server, irc_user_mode),
+	{ "user_mode", offsetof (struct server, irc_user_modes),
 	  ISPECT_STR, 0, NULL, false },
 
 	{}
@@ -1978,7 +1978,7 @@ server_new (struct poller *poller)
 	self->irc_buffer_map = str_map_make (NULL);
 	self->irc_buffer_map.key_xfrm = irc_strxfrm;
 
-	self->irc_user_mode = str_make ();
+	self->irc_user_modes = str_make ();
 
 	self->outstanding_joins = strv_make ();
 	self->cap_ls_buf = strv_make ();
@@ -2025,7 +2025,7 @@ server_destroy (struct server *self)
 
 	if (self->irc_user)
 		user_unref (self->irc_user);
-	str_free (&self->irc_user_mode);
+	str_free (&self->irc_user_modes);
 	free (self->irc_user_host);
 
 	strv_free (&self->outstanding_joins);
@@ -2976,6 +2976,45 @@ relay_prepare_buffer_line (struct app_context *ctx, struct buffer *buffer,
 
 // TODO: Consider pushing this whole block of code much further down.
 static void formatter_add (struct formatter *self, const char *format, ...);
+static char *irc_to_utf8 (const char *text);
+
+static void
+relay_prepare_channel_buffer_update (struct app_context *ctx,
+	struct buffer *buffer, struct relay_buffer_context_channel *e)
+{
+	struct channel *channel = buffer->channel;
+	struct formatter f = formatter_make (ctx, buffer->server);
+	if (channel->topic)
+		formatter_add (&f, "#m", channel->topic);
+	e->topic = relay_items (ctx, f.items, &e->topic_len);
+	formatter_free (&f);
+
+	// As in make_prompt(), conceal the last known channel modes.
+	// XXX: This should use irc_channel_is_joined().
+	if (!channel->users_len)
+		return;
+
+	struct str modes = str_make ();
+	str_append_str (&modes, &channel->no_param_modes);
+
+	struct str params = str_make ();
+	struct str_map_iter iter = str_map_iter_make (&channel->param_modes);
+	const char *param;
+	while ((param = str_map_iter_next (&iter)))
+	{
+		str_append_c (&modes, iter.link->key[0]);
+		str_append_c (&params, ' ');
+		str_append (&params, param);
+	}
+
+	str_append_str (&modes, &params);
+	str_free (&params);
+
+	char *modes_utf8 = irc_to_utf8 (modes.str);
+	str_free (&modes);
+	e->modes = str_from_cstr (modes_utf8);
+	free (modes_utf8);
+}
 
 static void
 relay_prepare_buffer_update (struct app_context *ctx, struct buffer *buffer)
@@ -2997,18 +3036,10 @@ relay_prepare_buffer_update (struct app_context *ctx, struct buffer *buffer)
 		server_name = &e->context.server.server_name;
 		break;
 	case BUFFER_CHANNEL:
-	{
 		e->context.kind = RELAY_BUFFER_KIND_CHANNEL;
 		server_name = &e->context.channel.server_name;
-
-		struct formatter f = formatter_make (ctx, buffer->server);
-		if (buffer->channel->topic)
-			formatter_add (&f, "#m", buffer->channel->topic);
-		e->context.channel.topic =
-			relay_items (ctx, f.items, &e->context.channel.topic_len);
-		formatter_free (&f);
+		relay_prepare_channel_buffer_update (ctx, buffer, &e->context.channel);
 		break;
-	}
 	case BUFFER_PM:
 		e->context.kind = RELAY_BUFFER_KIND_PRIVATE_MESSAGE;
 		server_name = &e->context.private_message.server_name;
@@ -3086,9 +3117,6 @@ relay_server_state_for_server (struct server *s)
 	return 0;
 }
 
-// TODO: Consider pushing this whole block of code further down.
-static char *irc_to_utf8 (const char *text);
-
 static void
 relay_prepare_server_update (struct app_context *ctx, struct server *s)
 {
@@ -3103,9 +3131,9 @@ relay_prepare_server_update (struct app_context *ctx, struct server *s)
 		e->data.registered.user = str_from_cstr (user_utf8);
 		free (user_utf8);
 
-		char *user_mode_utf8 = irc_to_utf8 (s->irc_user_mode.str);
-		e->data.registered.user_mode = str_from_cstr (user_mode_utf8);
-		free (user_mode_utf8);
+		char *user_modes_utf8 = irc_to_utf8 (s->irc_user_modes.str);
+		e->data.registered.user_modes = str_from_cstr (user_modes_utf8);
+		free (user_modes_utf8);
 	}
 }
 
@@ -5311,10 +5339,8 @@ irc_make_channel (struct server *s, char *name)
 }
 
 static void
-irc_channel_set_topic (struct channel *channel, const char *topic)
+irc_channel_broadcast_buffer_update (const struct channel *channel)
 {
-	cstr_set (&channel->topic, xstrdup (topic));
-
 	struct server *s = channel->s;
 	struct buffer *buffer = str_map_find (&s->irc_buffer_map, channel->name);
 	if (buffer)
@@ -5324,6 +5350,13 @@ irc_channel_set_topic (struct channel *channel, const char *topic)
 	}
 }
 
+static void
+irc_channel_set_topic (struct channel *channel, const char *topic)
+{
+	cstr_set (&channel->topic, xstrdup (topic));
+	irc_channel_broadcast_buffer_update (channel);
+}
+
 static struct channel_user *
 irc_channel_get_user (struct channel *channel, struct user *user)
 {
@@ -5349,6 +5382,9 @@ irc_left_channel (struct channel *channel)
 
 	LIST_FOR_EACH (struct channel_user, iter, channel->users)
 		irc_channel_unlink_user (channel, iter);
+
+	// Send empty channel modes.
+	irc_channel_broadcast_buffer_update (channel);
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -5693,7 +5729,7 @@ irc_destroy_state (struct server *s)
 		s->irc_user = NULL;
 	}
 
-	str_reset (&s->irc_user_mode);
+	str_reset (&s->irc_user_modes);
 	cstr_set (&s->irc_user_host, NULL);
 
 	strv_reset (&s->outstanding_joins);
@@ -6671,7 +6707,7 @@ make_chanmode_postfix (struct channel *channel, struct str *modes)
 		str_append (modes, channel->no_param_modes.str);
 
 	struct str_map_iter iter = str_map_iter_make (&channel->param_modes);
-	char *param;
+	const char *param;
 	while ((param = str_map_iter_next (&iter)))
 		str_append_c (modes, iter.link->key[0]);
 }
@@ -6688,8 +6724,8 @@ make_server_postfix_registered (struct buffer *buffer, struct str *output)
 			irc_get_channel_user_prefix (s, channel_user, output);
 	}
 	str_append (output, s->irc_user->nickname);
-	if (s->irc_user_mode.len)
-		str_append_printf (output, "(%s)", s->irc_user_mode.str);
+	if (s->irc_user_modes.len)
+		str_append_printf (output, "(%s)", s->irc_user_modes.str);
 }
 
 static void
@@ -6736,7 +6772,7 @@ make_prompt (struct app_context *ctx, struct str *output)
 		buffer_get_index (ctx, buffer), buffer->name);
 	// We remember old modes, don't show them while we're not on the channel
 	if (buffer->type == BUFFER_CHANNEL
-	 && buffer->channel->users_len)
+	 && irc_channel_is_joined (buffer->channel))
 	{
 		struct str modes = str_make ();
 		make_chanmode_postfix (buffer->channel, &modes);
@@ -7100,7 +7136,11 @@ irc_handle_mode_channel (struct channel *channel, char **params)
 {
 	struct mode_processor p = { .s = channel->s, .channel = channel };
 	mode_processor_run (&p, params, mode_processor_apply_channel);
-	return p.changes == p.usermode_changes;
+	if (p.changes == p.usermode_changes)
+		return true;
+
+	irc_channel_broadcast_buffer_update (channel);
+	return false;
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -7108,7 +7148,7 @@ irc_handle_mode_channel (struct channel *channel, char **params)
 static bool
 mode_processor_apply_user (struct mode_processor *self)
 {
-	mode_processor_toggle (self, &self->s->irc_user_mode);
+	mode_processor_toggle (self, &self->s->irc_user_modes);
 	return true;
 }
 
@@ -8191,7 +8231,7 @@ static void
 irc_on_registered (struct server *s, const char *nickname)
 {
 	s->irc_user = irc_get_or_make_user (s, nickname);
-	str_reset (&s->irc_user_mode);
+	str_reset (&s->irc_user_modes);
 	cstr_set (&s->irc_user_host, NULL);
 
 	irc_set_state (s, IRC_REGISTERED);
@@ -8262,7 +8302,7 @@ irc_handle_rpl_umodeis (struct server *s, const struct irc_message *msg)
 	if (msg->params.len < 2)
 		return;
 
-	str_reset (&s->irc_user_mode);
+	str_reset (&s->irc_user_modes);
 	irc_handle_mode_user (s, msg->params.vector + 1);
 
 	// XXX: do we want to log a message?