From b9bcc7846af839cf8a5190fb5ce910267a9dbbbe Mon Sep 17 00:00:00 2001
From: Sadie Powell
Date: Wed, 17 Jun 2026 14:43:57 +0100
Subject: Allow modules to send the ISupport list to clients.

---
 include/modules/isupport.h | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

(limited to 'include/modules')

diff --git a/include/modules/isupport.h b/include/modules/isupport.h
index 47d01c950..8999eb88b 100644
--- a/include/modules/isupport.h
+++ b/include/modules/isupport.h
@@ -21,6 +21,8 @@
 
 namespace ISupport
 {
+	class API;
+	class APIBase;
 	class EventListener;
 	class EventProvider;
 
@@ -34,6 +36,33 @@ enum
 	RPL_ISUPPORT = 5,
 };
 
+/** Defines the interface for the ISupport API. */
+class ISupport::APIBase
+	: public DataProvider
+{
+public:
+	APIBase(Module* mod)
+		: DataProvider(mod, "isupportapi")
+	{
+	}
+
+	/** Sends a full ISupport numeric set to the specified user.
+	 * @param user The user to send to.
+	 */
+	virtual void SendTo(LocalUser* user) const = 0;
+};
+
+/** Allows modules to send ISupport messages to users. */
+class ISupport::API final
+	: public dynamic_reference<ISupport::APIBase>
+{
+public:
+	API(Module* mod)
+		: dynamic_reference<ISupport::APIBase>(mod, "isupportapi")
+	{
+	}
+};
+
 class ISupport::EventListener
 	: public Events::ModuleEventListener
 {
-- 
cgit v1.3.1-10-gc9f91


From 9ff8807fd6966a8d30bdcb656041976a724a400d Mon Sep 17 00:00:00 2001
From: Sadie Powell
Date: Wed, 17 Jun 2026 15:02:43 +0100
Subject: Allow modules to control which clients receive an ISupport diff.

---
 include/modules/isupport.h           | 4 ++++
 src/coremods/core_info/core_info.cpp | 2 +-
 src/coremods/core_info/isupport.cpp  | 7 ++++++-
 3 files changed, 11 insertions(+), 2 deletions(-)

(limited to 'include/modules')

diff --git a/include/modules/isupport.h b/include/modules/isupport.h
index 8999eb88b..50753de49 100644
--- a/include/modules/isupport.h
+++ b/include/modules/isupport.h
@@ -75,6 +75,10 @@ protected:
 public:
 	virtual void OnBuildISupport(TokenMap& tokens) { }
 	virtual void OnBuildClassISupport(const std::shared_ptr<ConnectClass>& klass, TokenMap& tokens) { }
+	virtual ModResult OnSendISupportDiff(LocalUser* user, const TokenMap& tokens)
+	{
+		return MOD_RES_PASSTHRU;
+	}
 };
 
 class ISupport::EventProvider final
diff --git a/src/coremods/core_info/core_info.cpp b/src/coremods/core_info/core_info.cpp
index 40630dc20..b72b553dd 100644
--- a/src/coremods/core_info/core_info.cpp
+++ b/src/coremods/core_info/core_info.cpp
@@ -184,7 +184,7 @@ public:
 		// can't break the API in a stable release. For now we use this and
 		// prioritise it to be after core_user checks whether the user needs
 		// to die.
-		if (user->IsFullyConnected() && !user->quitting)
+		if (!user->quitting)
 			isupport.ChangeClass(user, user->GetClass(), klass);
 	}
 
diff --git a/src/coremods/core_info/isupport.cpp b/src/coremods/core_info/isupport.cpp
index 846fe67f0..1cb3c5672 100644
--- a/src/coremods/core_info/isupport.cpp
+++ b/src/coremods/core_info/isupport.cpp
@@ -129,7 +129,8 @@ void ISupportManager::Build()
 		for (LocalUser* user : ServerInstance->Users.GetLocalUsers())
 		{
 			const auto& klass = user->GetClass();
-			if (!(user->connected & User::CONN_FULL))
+			auto modres = isupportevprov.FirstResult(&ISupport::EventListener::OnSendISupportDiff, user, newtokens[klass]);
+			if (!modres.check(user->IsFullyConnected()))
 				continue; // User hasn't received 005 yet.
 
 			auto numerics = diffnumerics.find(klass);
@@ -185,6 +186,10 @@ void ISupportManager::ChangeClass(LocalUser* user, const std::shared_ptr<Connect
 	ISupport::TokenMap difftokens;
 	TokenDifference(difftokens, oldtokens->second, newtokens->second);
 
+	auto modres = isupportevprov.FirstResult(&ISupport::EventListener::OnSendISupportDiff, user, difftokens);
+	if (!modres.check(user->IsFullyConnected()))
+		return; // User hasn't received 005 yet.
+
 	std::vector<Numeric::Numeric> diffnumerics;
 	BuildNumerics(difftokens, diffnumerics);
 
-- 
cgit v1.3.1-10-gc9f91