From 1788e55713e9124f880dd77075024fa8cce4c05d Mon Sep 17 00:00:00 2001
From: Ed Kellett <e@kellett.im>
Date: Mon, 18 Oct 2021 18:26:05 +0100
Subject: [PATCH] Support *mask* and !*mask* in LIST

---
 include/client.h |  2 +-
 modules/m_list.c | 25 +++++++++++++++++++++++--
 2 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/include/client.h b/include/client.h
index fa736bd3..6a50f533 100644
--- a/include/client.h
+++ b/include/client.h
@@ -308,7 +308,7 @@ struct PreClient
 
 struct ListClient
 {
-	char *chname;
+	char *chname, *mask, *nomask;
 	unsigned int users_min, users_max;
 	time_t created_min, created_max, topic_min, topic_max;
 	int operspy;
diff --git a/modules/m_list.c b/modules/m_list.c
index 59026e90..03d05f35 100644
--- a/modules/m_list.c
+++ b/modules/m_list.c
@@ -100,7 +100,7 @@ static int _modinit(void)
 	 * T = topic search (T> T<)
 	 */
 	add_isupport("SAFELIST", isupport_string, "");
-	add_isupport("ELIST", isupport_string, "CTU");
+	add_isupport("ELIST", isupport_string, "CMNTU");
 
 	return 0;
 }
@@ -191,7 +191,7 @@ mo_list(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_
 	}
 
 	/* Single channel. */
-	if (args && IsChannelName(args))
+	if (args && IsChannelName(args) && !strchr(args, ','))
 	{
 		safelist_channel_named(source_p, args, operspy);
 		return;
@@ -205,6 +205,8 @@ mo_list(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_
 	params->operspy = operspy;
 	params->created_min = params->topic_min =
 		params->created_max = params->topic_max = 0;
+	params->mask = NULL;
+	params->nomask = NULL;
 
 	if (args && !EmptyString(args))
 	{
@@ -280,6 +282,17 @@ mo_list(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_
 					}
 				}
 			}
+			else if (*args == '!')
+			{
+				args++;
+				rb_free(params->nomask);
+				params->nomask = rb_strdup(args);
+			}
+			else if (*args == '?' || *args == '*' || IsChanPrefix(*args))
+			{
+				rb_free(params->mask);
+				params->mask = rb_strdup(args);
+			}
 
 			if (EmptyString(p))
 				break;
@@ -376,6 +389,8 @@ static void safelist_client_release(struct Client *client_p)
 	rb_dlinkFindDestroy(client_p, &safelisting_clients);
 
 	rb_free(client_p->localClient->safelist_data->chname);
+	rb_free(client_p->localClient->safelist_data->mask);
+	rb_free(client_p->localClient->safelist_data->nomask);
 	rb_free(client_p->localClient->safelist_data);
 
 	client_p->localClient->safelist_data = NULL;
@@ -459,6 +474,12 @@ static void safelist_one_channel(struct Client *source_p, struct Channel *chptr,
 	if (params->created_max && chptr->channelts > params->created_max)
 		return;
 
+	if (params->mask && !match(params->mask, chptr->chname))
+		return;
+
+	if (params->nomask && match(params->nomask, chptr->chname))
+		return;
+
 	list_one_channel(source_p, chptr, visible);
 }