From 071e114ffa945522a7a9acc3259427166992d5ee Mon Sep 17 00:00:00 2001
From: sfan5 <sfan5@live.de>
Date: Wed, 10 May 2017 15:29:21 +0200
Subject: Private nodemeta (#5702)

* Private node metadata that isn't sent to the client
---
 src/script/lua_api/l_nodemeta.cpp | 27 +++++++++++++++++++++++++++
 src/script/lua_api/l_nodemeta.h   |  3 +++
 2 files changed, 30 insertions(+)

(limited to 'src/script')

diff --git a/src/script/lua_api/l_nodemeta.cpp b/src/script/lua_api/l_nodemeta.cpp
index 6232112c5..5dfa6d52e 100644
--- a/src/script/lua_api/l_nodemeta.cpp
+++ b/src/script/lua_api/l_nodemeta.cpp
@@ -94,6 +94,32 @@ int NodeMetaRef::l_get_inventory(lua_State *L)
 	return 1;
 }
 
+// mark_as_private(self, <string> or {<string>, <string>, ...})
+int NodeMetaRef::l_mark_as_private(lua_State *L)
+{
+	MAP_LOCK_REQUIRED;
+
+	NodeMetaRef *ref = checkobject(L, 1);
+	NodeMetadata *meta = dynamic_cast<NodeMetadata*>(ref->getmeta(true));
+	assert(meta);
+
+	if (lua_istable(L, 2)) {
+		lua_pushnil(L);
+		while (lua_next(L, 2) != 0) {
+			// key at index -2 and value at index -1
+			luaL_checktype(L, -1, LUA_TSTRING);
+			meta->markPrivate(lua_tostring(L, -1), true);
+			// removes value, keeps key for next iteration
+			lua_pop(L, 1);
+		}
+	} else if (lua_isstring(L, 2)) {
+		meta->markPrivate(lua_tostring(L, 2), true);
+	}
+	ref->reportMetadataChange();
+
+	return 0;
+}
+
 void NodeMetaRef::handleToTable(lua_State *L, Metadata *_meta)
 {
 	// fields
@@ -229,6 +255,7 @@ const luaL_Reg NodeMetaRef::methodsServer[] = {
 	luamethod(MetaDataRef, to_table),
 	luamethod(MetaDataRef, from_table),
 	luamethod(NodeMetaRef, get_inventory),
+	luamethod(NodeMetaRef, mark_as_private),
 	luamethod(MetaDataRef, equals),
 	{0,0}
 };
diff --git a/src/script/lua_api/l_nodemeta.h b/src/script/lua_api/l_nodemeta.h
index 2ac028079..dd4260ff9 100644
--- a/src/script/lua_api/l_nodemeta.h
+++ b/src/script/lua_api/l_nodemeta.h
@@ -73,6 +73,9 @@ private:
 	// get_inventory(self)
 	static int l_get_inventory(lua_State *L);
 
+	// mark_as_private(self, <string> or {<string>, <string>, ...})
+	static int l_mark_as_private(lua_State *L);
+
 public:
 	NodeMetaRef(v3s16 p, ServerEnvironment *env);
 	NodeMetaRef(Metadata *meta);
-- 
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