irc: fix groups in channel nicklist when reconnecting to a server that supports more nick prefixes than the previously connected server

ChangeLog

@@ -22,6 +22,8 @@ http://weechat.org/files/releasenotes/ReleaseNotes-devel.html[release notes]
 * core: add options to customize default text search in buffers:
   weechat.look.buffer_search_{case_sensitive|force_default|regex|where}
 * api: fix read of arrays in hdata functions hdata_<type> (bug #40354)
+* irc: fix groups in channel nicklist when reconnecting to a server that
+  supports more nick prefixes than the previously connected server
 * irc: fix auto-switch to channel buffer when doing /join channel (without "#")
 * irc: add option irc.look.notice_welcome_tags
 * irc: add server option "default_msg_kick" to customize default kick/kickban

src/plugins/irc/irc-channel.c

@@ -152,10 +152,9 @@ irc_channel_new (struct t_irc_server *server, int channel_type,
 {
     struct t_irc_channel *new_channel;
     struct t_gui_buffer *new_buffer, *ptr_buffer_for_merge;
-    int i, buffer_created, current_buffer_number, buffer_position, manual_join;
+    int buffer_created, current_buffer_number, buffer_position, manual_join;
     int noswitch;
-    char *buffer_name, str_number[32], str_group[32], *channel_name_lower;
-    const char *prefix_modes;
+    char *buffer_name, str_number[32], *channel_name_lower;
 
     /* alloc memory for new channel */
     if ((new_channel = malloc (sizeof (*new_channel))) == NULL)
@@ -262,22 +261,6 @@ irc_channel_new (struct t_irc_server *server, int channel_type,
         }
     }
 
-    if (channel_type == IRC_CHANNEL_TYPE_CHANNEL)
-    {
-        prefix_modes = irc_server_get_prefix_modes (server);
-        for (i = 0; prefix_modes[i]; i++)
-        {
-            snprintf (str_group, sizeof (str_group), "%03d|%c",
-                      i, prefix_modes[i]);
-            weechat_nicklist_add_group (new_buffer, NULL, str_group,
-                                        "weechat.color.nicklist_group", 1);
-        }
-        snprintf (str_group, sizeof (str_group), "%03d|%s",
-                  IRC_NICK_GROUP_OTHER_NUMBER, IRC_NICK_GROUP_OTHER_NAME);
-        weechat_nicklist_add_group (new_buffer, NULL, str_group,
-                                    "weechat.color.nicklist_group", 1);
-    }
-
     /* initialize new channel */
     new_channel->type = channel_type;
     new_channel->name = strdup (channel_name);
@@ -375,6 +358,35 @@ irc_channel_new (struct t_irc_server *server, int channel_type,
     return new_channel;
 }
 
+/*
+ * Add groups in nicklist for a channel.
+ */
+
+void
+irc_channel_add_nicklist_groups (struct t_irc_server *server,
+                                 struct t_irc_channel *channel)
+{
+    const char *prefix_modes;
+    char str_group[32];
+    int i;
+
+    if (channel->type != IRC_CHANNEL_TYPE_CHANNEL)
+        return;
+
+    prefix_modes = irc_server_get_prefix_modes (server);
+    for (i = 0; prefix_modes[i]; i++)
+    {
+        snprintf (str_group, sizeof (str_group), "%03d|%c",
+                  i, prefix_modes[i]);
+        weechat_nicklist_add_group (channel->buffer, NULL, str_group,
+                                    "weechat.color.nicklist_group", 1);
+    }
+    snprintf (str_group, sizeof (str_group), "%03d|%s",
+              IRC_NICK_GROUP_OTHER_NUMBER, IRC_NICK_GROUP_OTHER_NAME);
+    weechat_nicklist_add_group (channel->buffer, NULL, str_group,
+                                "weechat.color.nicklist_group", 1);
+}
+
 /*
  * Sets topic for a channel.
  */

src/plugins/irc/irc-channel.h

@@ -83,6 +83,8 @@ extern struct t_irc_channel *irc_channel_new (struct t_irc_server *server,
                                               const char *channel_name,
                                               int switch_to_channel,
                                               int auto_switch);
+extern void irc_channel_add_nicklist_groups (struct t_irc_server *server,
+                                             struct t_irc_channel *channel);
 extern void irc_channel_set_topic (struct t_irc_channel *channel,
                                    const char *topic);
 extern void irc_channel_set_modes (struct t_irc_channel *channel,

src/plugins/irc/irc-nick.c

@@ -632,6 +632,9 @@ irc_nick_new (struct t_irc_server *server, struct t_irc_channel *channel,
     if (!nickname || !nickname[0])
         return NULL;
 
+    if (!channel->nicks)
+        irc_channel_add_nicklist_groups (server, channel);
+
     /* nick already exists on this channel? */
     ptr_nick = irc_nick_search (server, channel, nickname);
     if (ptr_nick)
@@ -821,6 +824,9 @@ irc_nick_free_all (struct t_irc_server *server, struct t_irc_channel *channel)
         irc_nick_free (server, channel, channel->nicks);
     }
 
+    /* remove all groups in nicklist */
+    weechat_nicklist_remove_all (channel->buffer);
+
     /* should be zero, but prevent any bug :D */
     channel->nicks_count = 0;
 }