From 9816805ee85c761bccb79583fa2d64665fc72bcf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C5=99emysl=20Janouch?= <p.janouch@gmail.com>
Date: Sun, 7 Jun 2015 04:20:39 +0200
Subject: [PATCH] degesch: process user mode changes

---
 degesch.c | 69 ++++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 58 insertions(+), 11 deletions(-)

diff --git a/degesch.c b/degesch.c
index 933b5c8..54a2ff0 100644
--- a/degesch.c
+++ b/degesch.c
@@ -1048,7 +1048,7 @@ struct server
 	struct str_map irc_buffer_map;      ///< Maps IRC identifiers to buffers
 
 	struct user *irc_user;              ///< Our own user
-	char *irc_user_mode;                ///< Our current user mode
+	struct str irc_user_mode;           ///< Our current user modes
 	char *irc_user_host;                ///< Our current user@host
 
 	// Server-specific information (from RPL_ISUPPORT):
@@ -1091,6 +1091,8 @@ server_init (struct server *self, struct poller *poller)
 	str_init (&self->read_buffer);
 	self->state = IRC_DISCONNECTED;
 
+	str_init (&self->irc_user_mode);
+
 	// Defaults as per the RPL_ISUPPORT drafts, or RFC 1459
 	self->irc_tolower = irc_tolower;
 	self->irc_strxfrm = irc_strxfrm;
@@ -1151,7 +1153,7 @@ server_free (struct server *self)
 
 	if (self->irc_user)
 		user_unref (self->irc_user);
-	free (self->irc_user_mode);
+	str_free (&self->irc_user_mode);
 	free (self->irc_user_host);
 
 	free (self->irc_chantypes);
@@ -3184,8 +3186,7 @@ on_irc_disconnected (struct server *s)
 		s->irc_user = NULL;
 	}
 
-	free (s->irc_user_mode);
-	s->irc_user_mode = NULL;
+	str_reset (&s->irc_user_mode);
 	free (s->irc_user_host);
 	s->irc_user_host = NULL;
 
@@ -3703,8 +3704,8 @@ make_prompt (struct app_context *ctx, struct str *output)
 					str_append (output, channel_user->prefixes.str);
 			}
 			str_append (output, s->irc_user->nickname);
-			if (*s->irc_user_mode)
-				str_append_printf (output, "(%s)", s->irc_user_mode);
+			if (s->irc_user_mode.len)
+				str_append_printf (output, "(%s)", s->irc_user_mode.str);
 		}
 	}
 
@@ -3985,6 +3986,8 @@ mode_processor_next_param (struct mode_processor *self)
 	return *self->params++;
 }
 
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
 static void
 mode_processor_do_user (struct mode_processor *self)
 {
@@ -4092,8 +4095,6 @@ mode_processor_step (struct mode_processor *self, char mode_char)
 	return true;
 }
 
-// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
 static void
 irc_handle_mode_channel
 	(struct server *s, struct channel *channel, char **params)
@@ -4115,6 +4116,52 @@ irc_handle_mode_channel
 	}
 }
 
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+static bool
+mode_processor_step_user (struct mode_processor *self, char mode_char)
+{
+	struct server *s = self->s;
+
+	if (mode_char == '+') { self->adding = true;  return true; }
+	if (mode_char == '-') { self->adding = false; return true; }
+
+	struct str *modes = &s->irc_user_mode;
+	const char *pos = strchr (modes->str, mode_char);
+	if (self->adding == !!pos)
+		return true;
+
+	if (self->adding)
+	{
+		str_append_c (modes, mode_char);
+		// TODO: sort the modes
+	}
+	else
+		str_remove_slice (modes, pos - modes->str, 1);
+	return true;
+}
+
+static void
+irc_handle_mode_user (struct server *s, char **params)
+{
+	struct mode_processor p;
+	mode_processor_init (&p);
+
+	p.params = params;
+	p.s = s;
+
+	const char *mode_string;
+	while ((mode_string = mode_processor_next_param (&p)))
+	{
+		mode_processor_step (&p, '+');
+		while (*mode_string)
+			if (!mode_processor_step_user (&p, *mode_string++))
+				break;
+	}
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
 static void
 irc_handle_mode (struct server *s, const struct irc_message *msg)
 {
@@ -4133,8 +4180,6 @@ irc_handle_mode (struct server *s, const struct irc_message *msg)
 	char *modes = irc_to_utf8 (s->ctx, reconstructed);
 	free (reconstructed);
 
-	// TODO: parse user mode changes
-
 	if (irc_is_channel (s, context))
 	{
 		struct channel *channel = str_map_find (&s->irc_channels, context);
@@ -4154,6 +4199,8 @@ irc_handle_mode (struct server *s, const struct irc_message *msg)
 	}
 	else if (irc_is_this_us (s, context))
 	{
+		irc_handle_mode_user (s, msg->params.vector + 1);
+
 		// FIXME: logging
 		buffer_send_status (s->ctx, s->buffer,
 			"User mode [%s] by %s", modes, who);
@@ -4625,7 +4672,7 @@ static void
 irc_on_registered (struct server *s, const char *nickname)
 {
 	s->irc_user = irc_get_or_make_user (s, nickname);
-	s->irc_user_mode = xstrdup ("");
+	str_reset (&s->irc_user_mode);
 	s->irc_user_host = NULL;
 
 	s->state = IRC_REGISTERED;