7 files changed, 95 insertions, 9 deletions

diff --git a/src/Bindings/DeprecatedBindings.cpp b/src/Bindings/DeprecatedBindings.cpp
index 0b2539fde..6dd6a4e59 100644
--- a/src/Bindings/DeprecatedBindings.cpp
+++ b/src/Bindings/DeprecatedBindings.cpp
@@ -52,7 +52,9 @@ static int tolua_get_AllToLua_g_BlockSpreadLightFalloff(lua_State* tolua_S)
 	{
 		tolua_Error tolua_err;
 		if (!tolua_isnumber(tolua_S, 2, 0, &tolua_err))
+		{
 			tolua_error(tolua_S, "#vinvalid type in array indexing.", &tolua_err);
+		}
 	}
 	#endif
 	BlockType = (int)tolua_tonumber(tolua_S, 2, 0);
@@ -78,7 +80,9 @@ static int tolua_get_AllToLua_g_BlockTransparent(lua_State* tolua_S)
 	{
 		tolua_Error tolua_err;
 		if (!tolua_isnumber(tolua_S, 2, 0, &tolua_err))
+		{
 			tolua_error(tolua_S, "#vinvalid type in array indexing.", &tolua_err);
+		}
 	}
 	#endif
 	BlockType = (int)tolua_tonumber(tolua_S, 2, 0);
@@ -104,7 +108,9 @@ static int tolua_get_AllToLua_g_BlockOneHitDig(lua_State* tolua_S)
 	{
 		tolua_Error tolua_err;
 		if (!tolua_isnumber(tolua_S, 2, 0, &tolua_err))
+		{
 			tolua_error(tolua_S, "#vinvalid type in array indexing.", &tolua_err);
+		}
 	}
 	#endif
 	BlockType = (int)tolua_tonumber(tolua_S, 2, 0);
@@ -130,7 +136,9 @@ static int tolua_get_AllToLua_g_BlockPistonBreakable(lua_State* tolua_S)
 	{
 		tolua_Error tolua_err;
 		if (!tolua_isnumber(tolua_S, 2, 0, &tolua_err))
+		{
 			tolua_error(tolua_S, "#vinvalid type in array indexing.", &tolua_err);
+		}
 	}
 	#endif
 	BlockType = (int)tolua_tonumber(tolua_S, 2, 0);
@@ -156,7 +164,9 @@ static int tolua_get_AllToLua_g_BlockIsSnowable(lua_State* tolua_S)
 	{
 		tolua_Error tolua_err;
 		if (!tolua_isnumber(tolua_S, 2, 0, &tolua_err))
+		{
 			tolua_error(tolua_S, "#vinvalid type in array indexing.", &tolua_err);
+		}
 	}
 	#endif
 	BlockType = (int)tolua_tonumber(tolua_S, 2, 0);
@@ -182,7 +192,9 @@ static int tolua_get_AllToLua_g_BlockIsSolid(lua_State* tolua_S)
 	{
 		tolua_Error tolua_err;
 		if (!tolua_isnumber(tolua_S, 2, 0, &tolua_err))
+		{
 			tolua_error(tolua_S, "#vinvalid type in array indexing.", &tolua_err);
+		}
 	}
 	#endif
 	BlockType = (int)tolua_tonumber(tolua_S, 2, 0);
@@ -208,7 +220,9 @@ static int tolua_get_AllToLua_g_BlockFullyOccupiesVoxel(lua_State* tolua_S)
 	{
 		tolua_Error tolua_err;
 		if (!tolua_isnumber(tolua_S, 2, 0, &tolua_err))
+		{
 			tolua_error(tolua_S, "#vinvalid type in array indexing.", &tolua_err);
+		}
 	}
 	#endif
 	BlockType = (int)tolua_tonumber(tolua_S, 2, 0);
@@ -233,8 +247,8 @@ static int tolua_AllToLua_StringToMobType00(lua_State* tolua_S)
 	#ifndef TOLUA_RELEASE
 	tolua_Error tolua_err;
 	if (
-		!tolua_iscppstring(tolua_S,1,0,&tolua_err) ||
-		!tolua_isnoobj(tolua_S,2,&tolua_err)
+		!tolua_iscppstring(tolua_S, 1, 0, &tolua_err) ||
+		!tolua_isnoobj(tolua_S, 2, &tolua_err)
 		)
 		goto tolua_lerror;
 	else
diff --git a/src/Bindings/ManualBindings.cpp b/src/Bindings/ManualBindings.cpp
index 750f7c65a..56f2e73bc 100644
--- a/src/Bindings/ManualBindings.cpp
+++ b/src/Bindings/ManualBindings.cpp
@@ -1874,6 +1874,72 @@ static int tolua_cWorld_ChunkStay(lua_State * tolua_S)
 
 
 
+static int tolua_cWorld_PrepareChunk(lua_State * tolua_S)
+{
+	/* Function signature:
+	World:PrepareChunk(ChunkX, ChunkZ, Callback)
+	*/
+	
+	// Check the param types:
+	cLuaState L(tolua_S);
+	if (
+		!L.CheckParamUserType     (1, "cWorld") ||
+		!L.CheckParamNumber       (2, 3) ||
+		!L.CheckParamFunctionOrNil(4)
+	)
+	{
+		return 0;
+	}
+	
+	// Read the params:
+	cWorld * world = nullptr;
+	int chunkX = 0, chunkZ = 0;
+	L.GetStackValues(1, world, chunkX, chunkZ);
+	if (world == nullptr)
+	{
+		LOGWARNING("World:PrepareChunk(): invalid world parameter");
+		L.LogStackTrace();
+		return 0;
+	}
+
+	// Wrap the Lua callback inside a C++ callback class:
+	class cCallback:
+		public cChunkCoordCallback
+	{
+	public:
+		cCallback(lua_State * a_LuaState):
+			m_LuaState(a_LuaState),
+			m_Callback(m_LuaState, 4)
+		{
+		}
+
+		// cChunkCoordCallback override:
+		virtual void Call(int a_CBChunkX, int a_CBChunkZ) override
+		{
+			if (m_Callback.IsValid())
+			{
+				m_LuaState.Call(m_Callback, a_CBChunkX, a_CBChunkZ);
+			}
+
+			// This is the last reference of this object, we must delete it so that it doesn't leak:
+			delete this;
+		}
+
+	protected:
+		cLuaState m_LuaState;
+		cLuaState::cRef m_Callback;
+	};
+	cCallback * callback = new cCallback(tolua_S);
+
+	// Call the chunk preparation:
+	world->PrepareChunk(chunkX, chunkZ, callback);
+	return 0;
+}
+
+
+
+
+
 static int tolua_cPlayer_GetPermissions(lua_State * tolua_S)
 {
 	// Function signature: cPlayer:GetPermissions() -> {permissions-array}
@@ -3401,6 +3467,7 @@ void ManualBindings::Bind(lua_State * tolua_S)
 			tolua_function(tolua_S, "GetBlockInfo",              tolua_cWorld_GetBlockInfo);
 			tolua_function(tolua_S, "GetBlockTypeMeta",          tolua_cWorld_GetBlockTypeMeta);
 			tolua_function(tolua_S, "GetSignLines",              tolua_cWorld_GetSignLines);
+			tolua_function(tolua_S, "PrepareChunk",              tolua_cWorld_PrepareChunk);
 			tolua_function(tolua_S, "QueueTask",                 tolua_cWorld_QueueTask);
 			tolua_function(tolua_S, "ScheduleTask",              tolua_cWorld_ScheduleTask);
 			tolua_function(tolua_S, "SetSignLines",              tolua_cWorld_SetSignLines);
diff --git a/src/Bindings/Plugin.h b/src/Bindings/Plugin.h
index 8cc9ff0cd..08677553c 100644
--- a/src/Bindings/Plugin.h
+++ b/src/Bindings/Plugin.h
@@ -54,7 +54,7 @@ public:
 	virtual bool OnChunkUnloaded            (cWorld & a_World, int a_ChunkX, int a_ChunkZ) = 0;
 	virtual bool OnChunkUnloading           (cWorld & a_World, int a_ChunkX, int a_ChunkZ) = 0;
 	virtual bool OnCollectingPickup         (cPlayer & a_Player, cPickup & a_Pickup) = 0;
-	virtual bool OnCraftingNoRecipe         (cPlayer & a_Player, cCraftingGrid & a_Grid, cCraftingRecipe * a_Recipe) = 0;
+	virtual bool OnCraftingNoRecipe         (cPlayer & a_Player, cCraftingGrid & a_Grid, cCraftingRecipe & a_Recipe) = 0;
 	virtual bool OnDisconnect               (cClientHandle & a_Client, const AString & a_Reason) = 0;
 	virtual bool OnEntityAddEffect          (cEntity & a_Entity, int a_EffectType, int a_EffectDurationTicks, int a_EffectIntensity, double a_DistanceModifier) = 0;
 	virtual bool OnExecuteCommand           (cPlayer * a_Player, const AStringVector & a_Split) = 0;
diff --git a/src/Bindings/PluginLua.cpp b/src/Bindings/PluginLua.cpp
index 391d8bcbe..ea782ea3f 100644
--- a/src/Bindings/PluginLua.cpp
+++ b/src/Bindings/PluginLua.cpp
@@ -382,7 +382,7 @@ bool cPluginLua::OnCollectingPickup(cPlayer & a_Player, cPickup & a_Pickup)
 
 
 
-bool cPluginLua::OnCraftingNoRecipe(cPlayer & a_Player, cCraftingGrid & a_Grid, cCraftingRecipe * a_Recipe)
+bool cPluginLua::OnCraftingNoRecipe(cPlayer & a_Player, cCraftingGrid & a_Grid, cCraftingRecipe & a_Recipe)
 {
 	cCSLock Lock(m_CriticalSection);
 	bool res = false;
diff --git a/src/Bindings/PluginLua.h b/src/Bindings/PluginLua.h
index 6bb134efc..7de5ffec4 100644
--- a/src/Bindings/PluginLua.h
+++ b/src/Bindings/PluginLua.h
@@ -78,7 +78,7 @@ public:
 	virtual bool OnChunkUnloaded            (cWorld & a_World, int a_ChunkX, int a_ChunkZ) override;
 	virtual bool OnChunkUnloading           (cWorld & a_World, int a_ChunkX, int a_ChunkZ) override;
 	virtual bool OnCollectingPickup         (cPlayer & a_Player, cPickup & a_Pickup) override;
-	virtual bool OnCraftingNoRecipe         (cPlayer & a_Player, cCraftingGrid & a_Grid, cCraftingRecipe * a_Recipe) override;
+	virtual bool OnCraftingNoRecipe         (cPlayer & a_Player, cCraftingGrid & a_Grid, cCraftingRecipe & a_Recipe) override;
 	virtual bool OnDisconnect               (cClientHandle & a_Client, const AString & a_Reason) override;
 	virtual bool OnEntityAddEffect          (cEntity & a_Entity, int a_EffectType, int a_EffectDurationTicks, int a_EffectIntensity, double a_DistanceModifier) override;
 	virtual bool OnExecuteCommand           (cPlayer * a_Player, const AStringVector & a_Split) override;
diff --git a/src/Bindings/PluginManager.cpp b/src/Bindings/PluginManager.cpp
index f63578885..406a540f4 100644
--- a/src/Bindings/PluginManager.cpp
+++ b/src/Bindings/PluginManager.cpp
@@ -448,7 +448,7 @@ bool cPluginManager::CallHookCollectingPickup(cPlayer & a_Player, cPickup & a_Pi
 
 
 
-bool cPluginManager::CallHookCraftingNoRecipe(cPlayer & a_Player, cCraftingGrid & a_Grid, cCraftingRecipe * a_Recipe)
+bool cPluginManager::CallHookCraftingNoRecipe(cPlayer & a_Player, cCraftingGrid & a_Grid, cCraftingRecipe & a_Recipe)
 {
 	FIND_HOOK(HOOK_CRAFTING_NO_RECIPE);
 	VERIFY_HOOK;
@@ -1459,11 +1459,16 @@ cPluginManager::CommandResult cPluginManager::HandleCommand(cPlayer & a_Player,
 
 
 
-cPlugin * cPluginManager::GetPlugin( const AString & a_Plugin) const
+cPlugin * cPluginManager::GetPlugin(const AString & a_Plugin) const
 {
 	for (PluginMap::const_iterator itr = m_Plugins.begin(); itr != m_Plugins.end(); ++itr)
 	{
-		if (itr->second == nullptr) continue;
+		if (itr->second == nullptr)
+		{
+			// The plugin is currently unloaded
+			continue;
+		}
+
 		if (itr->second->GetName().compare(a_Plugin) == 0)
 		{
 			return itr->second;
diff --git a/src/Bindings/PluginManager.h b/src/Bindings/PluginManager.h
index bc8c1f5e6..3a2aecc92 100644
--- a/src/Bindings/PluginManager.h
+++ b/src/Bindings/PluginManager.h
@@ -187,7 +187,7 @@ public:
 	bool CallHookChunkUnloaded            (cWorld & a_World, int a_ChunkX, int a_ChunkZ);
 	bool CallHookChunkUnloading           (cWorld & a_World, int a_ChunkX, int a_ChunkZ);
 	bool CallHookCollectingPickup         (cPlayer & a_Player, cPickup & a_Pickup);
-	bool CallHookCraftingNoRecipe         (cPlayer & a_Player, cCraftingGrid & a_Grid, cCraftingRecipe * a_Recipe);
+	bool CallHookCraftingNoRecipe         (cPlayer & a_Player, cCraftingGrid & a_Grid, cCraftingRecipe & a_Recipe);
 	bool CallHookDisconnect               (cClientHandle & a_Client, const AString & a_Reason);
 	bool CallHookEntityAddEffect          (cEntity & a_Entity, int a_EffectType, int a_EffectDurationTicks, int a_EffectIntensity, double a_DistanceModifier);
 	bool CallHookExecuteCommand           (cPlayer * a_Player, const AStringVector & a_Split);  // If a_Player == nullptr, it is a console cmd