From c38985825f299999135cc01aaf0052ec9138135a Mon Sep 17 00:00:00 2001
From: sfan5 <sfan5@live.de>
Date: Sat, 26 Nov 2016 17:35:25 +0100
Subject: Allow restricting detached inventories to one player

This combats the problem of sending the hundreds of
"creative" / "armor" or whatever detached invs that
exist on popular servers to each and every player
on join or on change of said invs.
---
 src/script/lua_api/l_inventory.cpp |  7 ++++---
 src/server.cpp                     | 18 ++++++++++++------
 src/server.h                       |  4 +++-
 3 files changed, 19 insertions(+), 10 deletions(-)

(limited to 'src')

diff --git a/src/script/lua_api/l_inventory.cpp b/src/script/lua_api/l_inventory.cpp
index 110e68d23..38eade609 100644
--- a/src/script/lua_api/l_inventory.cpp
+++ b/src/script/lua_api/l_inventory.cpp
@@ -520,16 +520,17 @@ int ModApiInventory::l_get_inventory(lua_State *L)
 	}
 }
 
-// create_detached_inventory_raw(name)
+// create_detached_inventory_raw(name, [player_name])
 int ModApiInventory::l_create_detached_inventory_raw(lua_State *L)
 {
 	NO_MAP_LOCK_REQUIRED;
 	const char *name = luaL_checkstring(L, 1);
-	if(getServer(L)->createDetachedInventory(name) != NULL){
+	const char *player = lua_isstring(L, 2) ? lua_tostring(L, 2) : "";
+	if (getServer(L)->createDetachedInventory(name, player) != NULL) {
 		InventoryLocation loc;
 		loc.setDetached(name);
 		InvRef::create(L, loc);
-	}else{
+	} else {
 		lua_pushnil(L);
 	}
 	return 1;
diff --git a/src/server.cpp b/src/server.cpp
index fae375425..fe67ac96e 100644
--- a/src/server.cpp
+++ b/src/server.cpp
@@ -2487,11 +2487,16 @@ void Server::sendDetachedInventory(const std::string &name, u16 peer_id)
 	NetworkPacket pkt(TOCLIENT_DETACHED_INVENTORY, 0, peer_id);
 	pkt.putRawString(s.c_str(), s.size());
 
-	if (peer_id != PEER_ID_INEXISTENT) {
-		Send(&pkt);
-	}
-	else {
-		m_clients.sendToAll(0, &pkt, true);
+	const std::string &check = m_detached_inventories_player[name];
+	if (peer_id == PEER_ID_INEXISTENT) {
+		if (check == "")
+			return m_clients.sendToAll(0, &pkt, true);
+		RemotePlayer *p = m_env->getPlayer(check.c_str());
+		if (p)
+			m_clients.send(p->peer_id, 0, &pkt, true);
+	} else {
+		if (check == "" || getPlayerName(peer_id) == check)
+			Send(&pkt);
 	}
 }
 
@@ -3224,7 +3229,7 @@ void Server::deleteParticleSpawner(const std::string &playername, u32 id)
 	SendDeleteParticleSpawner(peer_id, id);
 }
 
-Inventory* Server::createDetachedInventory(const std::string &name)
+Inventory* Server::createDetachedInventory(const std::string &name, const std::string &player)
 {
 	if(m_detached_inventories.count(name) > 0){
 		infostream<<"Server clearing detached inventory \""<<name<<"\""<<std::endl;
@@ -3235,6 +3240,7 @@ Inventory* Server::createDetachedInventory(const std::string &name)
 	Inventory *inv = new Inventory(m_itemdef);
 	sanity_check(inv);
 	m_detached_inventories[name] = inv;
+	m_detached_inventories_player[name] = player;
 	//TODO find a better way to do this
 	sendDetachedInventory(name,PEER_ID_INEXISTENT);
 	return inv;
diff --git a/src/server.h b/src/server.h
index 9e844e36c..cc2bcef25 100644
--- a/src/server.h
+++ b/src/server.h
@@ -270,7 +270,7 @@ public:
 	void deleteParticleSpawner(const std::string &playername, u32 id);
 
 	// Creates or resets inventory
-	Inventory* createDetachedInventory(const std::string &name);
+	Inventory* createDetachedInventory(const std::string &name, const std::string &player="");
 
 	// Envlock and conlock should be locked when using scriptapi
 	GameScripting *getScriptIface(){ return m_script; }
@@ -647,6 +647,8 @@ private:
 	*/
 	// key = name
 	std::map<std::string, Inventory*> m_detached_inventories;
+	// value = "" (visible to all players) or player name
+	std::map<std::string, std::string> m_detached_inventories_player;
 
 	DISABLE_CLASS_COPY(Server);
 };
-- 
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