From bd6d4666abe20247437ede28f73955d413fe5e22 Mon Sep 17 00:00:00 2001
From: Novatux <nathanael.courant@laposte.net>
Date: Sat, 26 Oct 2013 11:25:28 +0200
Subject: Add a callback: minetest.register_on_craft(itemstack, player,
 old_craft_grid, craft_inv) and minetest.register_craft_predict(itemstack,
 player, old_craft_grid, craft_inv)

---
 src/script/cpp_api/s_item.cpp | 51 +++++++++++++++++++++++++++++++++++++++++++
 src/script/cpp_api/s_item.h   |  6 +++++
 2 files changed, 57 insertions(+)

(limited to 'src/script')

diff --git a/src/script/cpp_api/s_item.cpp b/src/script/cpp_api/s_item.cpp
index b4536ac63..1d5f218cf 100644
--- a/src/script/cpp_api/s_item.cpp
+++ b/src/script/cpp_api/s_item.cpp
@@ -22,9 +22,12 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "common/c_converter.h"
 #include "common/c_content.h"
 #include "lua_api/l_item.h"
+#include "lua_api/l_inventory.h"
 #include "server.h"
 #include "log.h"
 #include "util/pointedthing.h"
+#include "inventory.h"
+#include "inventorymanager.h"
 
 bool ScriptApiItem::item_OnDrop(ItemStack &item,
 		ServerActiveObject *dropper, v3f pos)
@@ -86,6 +89,54 @@ bool ScriptApiItem::item_OnUse(ItemStack &item,
 	return true;
 }
 
+bool ScriptApiItem::item_OnCraft(ItemStack &item, ServerActiveObject *user,
+		const InventoryList *old_craft_grid, const InventoryLocation &craft_inv)
+{
+	SCRIPTAPI_PRECHECKHEADER
+
+	lua_getglobal(L, "minetest");
+	lua_getfield(L, -1, "on_craft");
+	LuaItemStack::create(L, item);
+	objectrefGetOrCreate(user);
+	
+	//Push inventory list
+	std::vector<ItemStack> items;
+	for(u32 i=0; i<old_craft_grid->getSize(); i++)
+		items.push_back(old_craft_grid->getItem(i));
+	push_items(L, items);
+
+	InvRef::create(L, craft_inv);
+	if(lua_pcall(L, 4, 1, 0))
+		scriptError("error: %s", lua_tostring(L, -1));
+	if(!lua_isnil(L, -1))
+		item = read_item(L,-1, getServer());
+	return true;
+}
+
+bool ScriptApiItem::item_CraftPredict(ItemStack &item, ServerActiveObject *user,
+		const InventoryList *old_craft_grid, const InventoryLocation &craft_inv)
+{
+	SCRIPTAPI_PRECHECKHEADER
+
+	lua_getglobal(L, "minetest");
+	lua_getfield(L, -1, "craft_predict");
+	LuaItemStack::create(L, item);
+	objectrefGetOrCreate(user);
+	
+	//Push inventory list
+	std::vector<ItemStack> items;
+	for(u32 i=0; i<old_craft_grid->getSize(); i++)
+		items.push_back(old_craft_grid->getItem(i));
+	push_items(L, items);
+
+	InvRef::create(L, craft_inv);
+	if(lua_pcall(L, 4, 1, 0))
+		scriptError("error: %s", lua_tostring(L, -1));
+	if(!lua_isnil(L, -1))
+		item = read_item(L,-1, getServer());
+	return true;
+}
+
 // Retrieves minetest.registered_items[name][callbackname]
 // If that is nil or on error, return false and stack is unchanged
 // If that is a function, returns true and pushes the
diff --git a/src/script/cpp_api/s_item.h b/src/script/cpp_api/s_item.h
index 0f2b16042..4964dd5b4 100644
--- a/src/script/cpp_api/s_item.h
+++ b/src/script/cpp_api/s_item.h
@@ -29,6 +29,8 @@ class ServerActiveObject;
 struct ItemDefinition;
 class LuaItemStack;
 class ModApiItemMod;
+class InventoryList;
+class InventoryLocation;
 
 class ScriptApiItem
 : virtual public ScriptApiBase
@@ -40,6 +42,10 @@ public:
 			ServerActiveObject *placer, const PointedThing &pointed);
 	bool item_OnUse(ItemStack &item,
 			ServerActiveObject *user, const PointedThing &pointed);
+	bool item_OnCraft(ItemStack &item, ServerActiveObject *user,
+			const InventoryList *old_craft_grid, const InventoryLocation &craft_inv);
+	bool item_CraftPredict(ItemStack &item, ServerActiveObject *user,
+			const InventoryList *old_craft_grid, const InventoryLocation &craft_inv);
 
 protected:
 	friend class LuaItemStack;
-- 
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