My implementation of https://github.com/ircv3/ircv3-ideas/issues/108

files/rated.c

@@ -0,0 +1,85 @@
+/*
+  Licence: GPLv3 or later
+  Copyright Ⓒ 2023 Valerie Pond
+  draft/rated
+
+*/
+/*** <<<MODULE MANAGER START>>>
+module
+{
+		documentation "https://github.com/ValwareIRC/valware-unrealircd-mods/blob/main/rated/README.md";
+		troubleshooting "In case of problems, documentation or e-mail me at [email protected]";
+		min-unrealircd-version "6.*";
+		max-unrealircd-version "6.*";
+		post-install-text {
+				"The module is installed. Now all you need to do is add a loadmodule line:";
+				"loadmodule \"third/rated\";";
+				"The module does not need any other configuration.";
+		}
+}
+*** <<<MODULE MANAGER END>>>
+*/
+
+
+#include "unrealircd.h"
+#define MTAG_RATED "+draft/rated" // can be changed at a later date
+
+ModuleHeader MOD_HEADER = {
+	"third/rated",
+	"1.0",
+	"+draft/rated",
+	"Valware",
+	"unrealircd-6",
+};
+
+int rated_mtag_is_ok(Client *client, const char *name, const char *value);
+void mtag_add_rated(Client *client, MessageTag *recv_mtags, MessageTag **mtag_list, const char *signature);
+
+MOD_INIT()
+{
+	MessageTagHandlerInfo mtag;
+
+	MARK_AS_GLOBAL_MODULE(modinfo);
+
+	memset(&mtag, 0, sizeof(mtag));
+	mtag.is_ok = rated_mtag_is_ok;
+	mtag.flags = MTAG_HANDLER_FLAGS_NO_CAP_NEEDED;
+	mtag.name = MTAG_RATED;
+	MessageTagHandlerAdd(modinfo->handle, &mtag);
+
+	HookAddVoid(modinfo->handle, HOOKTYPE_NEW_MESSAGE, 0, mtag_add_rated);
+
+	return MOD_SUCCESS;
+}
+
+MOD_LOAD()
+{
+	return MOD_SUCCESS;
+}
+
+MOD_UNLOAD()
+{
+	return MOD_SUCCESS;
+}
+
+int rated_mtag_is_ok(Client *client, const char *name, const char *value)
+{
+	if (strlen(value) && strlen(value) >= 100) // allow null values but cap long values to 100 chars.
+        return 0;
+	return 1;
+}
+
+void mtag_add_rated(Client *client, MessageTag *recv_mtags, MessageTag **mtag_list, const char *signature)
+{
+	MessageTag *m;
+
+	if (IsUser(client))
+	{
+		m = find_mtag(recv_mtags, MTAG_RATED);
+		if (m)
+		{
+			m = duplicate_mtag(m);
+			AddListItem(m, *mtag_list);
+		}
+	}
+}