minetest/src/script/lua_api/l_craft.cpp
est31 5b5c498011 Fix minetest.get_craft_recipe function
Previously, calling it resulted in a crash.
2015-03-23 13:40:20 +10:00

430 lines
11 KiB
C++

/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "lua_api/l_craft.h"
#include "lua_api/l_internal.h"
#include "lua_api/l_item.h"
#include "common/c_converter.h"
#include "common/c_content.h"
#include "server.h"
#include "craftdef.h"
struct EnumString ModApiCraft::es_CraftMethod[] =
{
{CRAFT_METHOD_NORMAL, "normal"},
{CRAFT_METHOD_COOKING, "cooking"},
{CRAFT_METHOD_FUEL, "fuel"},
{0, NULL},
};
// helper for register_craft
bool ModApiCraft::readCraftRecipeShaped(lua_State *L, int index,
int &width, std::vector<std::string> &recipe)
{
if(index < 0)
index = lua_gettop(L) + 1 + index;
if(!lua_istable(L, index))
return false;
lua_pushnil(L);
int rowcount = 0;
while(lua_next(L, index) != 0){
int colcount = 0;
// key at index -2 and value at index -1
if(!lua_istable(L, -1))
return false;
int table2 = lua_gettop(L);
lua_pushnil(L);
while(lua_next(L, table2) != 0){
// key at index -2 and value at index -1
if(!lua_isstring(L, -1))
return false;
recipe.push_back(lua_tostring(L, -1));
// removes value, keeps key for next iteration
lua_pop(L, 1);
colcount++;
}
if(rowcount == 0){
width = colcount;
} else {
if(colcount != width)
return false;
}
// removes value, keeps key for next iteration
lua_pop(L, 1);
rowcount++;
}
return width != 0;
}
// helper for register_craft
bool ModApiCraft::readCraftRecipeShapeless(lua_State *L, int index,
std::vector<std::string> &recipe)
{
if(index < 0)
index = lua_gettop(L) + 1 + index;
if(!lua_istable(L, index))
return false;
lua_pushnil(L);
while(lua_next(L, index) != 0){
// key at index -2 and value at index -1
if(!lua_isstring(L, -1))
return false;
recipe.push_back(lua_tostring(L, -1));
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
return true;
}
// helper for register_craft
bool ModApiCraft::readCraftReplacements(lua_State *L, int index,
CraftReplacements &replacements)
{
if(index < 0)
index = lua_gettop(L) + 1 + index;
if(!lua_istable(L, index))
return false;
lua_pushnil(L);
while(lua_next(L, index) != 0){
// key at index -2 and value at index -1
if(!lua_istable(L, -1))
return false;
lua_rawgeti(L, -1, 1);
if(!lua_isstring(L, -1))
return false;
std::string replace_from = lua_tostring(L, -1);
lua_pop(L, 1);
lua_rawgeti(L, -1, 2);
if(!lua_isstring(L, -1))
return false;
std::string replace_to = lua_tostring(L, -1);
lua_pop(L, 1);
replacements.pairs.push_back(
std::make_pair(replace_from, replace_to));
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
return true;
}
// register_craft({output=item, recipe={{item00,item10},{item01,item11}})
int ModApiCraft::l_register_craft(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
//infostream<<"register_craft"<<std::endl;
luaL_checktype(L, 1, LUA_TTABLE);
int table = 1;
// Get the writable craft definition manager from the server
IWritableCraftDefManager *craftdef =
getServer(L)->getWritableCraftDefManager();
std::string type = getstringfield_default(L, table, "type", "shaped");
/*
CraftDefinitionShaped
*/
if(type == "shaped"){
std::string output = getstringfield_default(L, table, "output", "");
if(output == "")
throw LuaError("Crafting definition is missing an output");
int width = 0;
std::vector<std::string> recipe;
lua_getfield(L, table, "recipe");
if(lua_isnil(L, -1))
throw LuaError("Crafting definition is missing a recipe"
" (output=\"" + output + "\")");
if(!readCraftRecipeShaped(L, -1, width, recipe))
throw LuaError("Invalid crafting recipe"
" (output=\"" + output + "\")");
CraftReplacements replacements;
lua_getfield(L, table, "replacements");
if(!lua_isnil(L, -1))
{
if(!readCraftReplacements(L, -1, replacements))
throw LuaError("Invalid replacements"
" (output=\"" + output + "\")");
}
CraftDefinition *def = new CraftDefinitionShaped(
output, width, recipe, replacements);
craftdef->registerCraft(def, getServer(L));
}
/*
CraftDefinitionShapeless
*/
else if(type == "shapeless"){
std::string output = getstringfield_default(L, table, "output", "");
if(output == "")
throw LuaError("Crafting definition (shapeless)"
" is missing an output");
std::vector<std::string> recipe;
lua_getfield(L, table, "recipe");
if(lua_isnil(L, -1))
throw LuaError("Crafting definition (shapeless)"
" is missing a recipe"
" (output=\"" + output + "\")");
if(!readCraftRecipeShapeless(L, -1, recipe))
throw LuaError("Invalid crafting recipe"
" (output=\"" + output + "\")");
CraftReplacements replacements;
lua_getfield(L, table, "replacements");
if(!lua_isnil(L, -1))
{
if(!readCraftReplacements(L, -1, replacements))
throw LuaError("Invalid replacements"
" (output=\"" + output + "\")");
}
CraftDefinition *def = new CraftDefinitionShapeless(
output, recipe, replacements);
craftdef->registerCraft(def, getServer(L));
}
/*
CraftDefinitionToolRepair
*/
else if(type == "toolrepair"){
float additional_wear = getfloatfield_default(L, table,
"additional_wear", 0.0);
CraftDefinition *def = new CraftDefinitionToolRepair(
additional_wear);
craftdef->registerCraft(def, getServer(L));
}
/*
CraftDefinitionCooking
*/
else if(type == "cooking"){
std::string output = getstringfield_default(L, table, "output", "");
if(output == "")
throw LuaError("Crafting definition (cooking)"
" is missing an output");
std::string recipe = getstringfield_default(L, table, "recipe", "");
if(recipe == "")
throw LuaError("Crafting definition (cooking)"
" is missing a recipe"
" (output=\"" + output + "\")");
float cooktime = getfloatfield_default(L, table, "cooktime", 3.0);
CraftReplacements replacements;
lua_getfield(L, table, "replacements");
if(!lua_isnil(L, -1))
{
if(!readCraftReplacements(L, -1, replacements))
throw LuaError("Invalid replacements"
" (cooking output=\"" + output + "\")");
}
CraftDefinition *def = new CraftDefinitionCooking(
output, recipe, cooktime, replacements);
craftdef->registerCraft(def, getServer(L));
}
/*
CraftDefinitionFuel
*/
else if(type == "fuel"){
std::string recipe = getstringfield_default(L, table, "recipe", "");
if(recipe == "")
throw LuaError("Crafting definition (fuel)"
" is missing a recipe");
float burntime = getfloatfield_default(L, table, "burntime", 1.0);
CraftReplacements replacements;
lua_getfield(L, table, "replacements");
if(!lua_isnil(L, -1))
{
if(!readCraftReplacements(L, -1, replacements))
throw LuaError("Invalid replacements"
" (fuel recipe=\"" + recipe + "\")");
}
CraftDefinition *def = new CraftDefinitionFuel(
recipe, burntime, replacements);
craftdef->registerCraft(def, getServer(L));
}
else
{
throw LuaError("Unknown crafting definition type: \"" + type + "\"");
}
lua_pop(L, 1);
return 0; /* number of results */
}
// get_craft_result(input)
int ModApiCraft::l_get_craft_result(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
int input_i = 1;
std::string method_s = getstringfield_default(L, input_i, "method", "normal");
enum CraftMethod method = (CraftMethod)getenumfield(L, input_i, "method",
es_CraftMethod, CRAFT_METHOD_NORMAL);
int width = 1;
lua_getfield(L, input_i, "width");
if(lua_isnumber(L, -1))
width = luaL_checkinteger(L, -1);
lua_pop(L, 1);
lua_getfield(L, input_i, "items");
std::vector<ItemStack> items = read_items(L, -1,getServer(L));
lua_pop(L, 1); // items
IGameDef *gdef = getServer(L);
ICraftDefManager *cdef = gdef->cdef();
CraftInput input(method, width, items);
CraftOutput output;
bool got = cdef->getCraftResult(input, output, true, gdef);
lua_newtable(L); // output table
if(got){
ItemStack item;
item.deSerialize(output.item, gdef->idef());
LuaItemStack::create(L, item);
lua_setfield(L, -2, "item");
setintfield(L, -1, "time", output.time);
} else {
LuaItemStack::create(L, ItemStack());
lua_setfield(L, -2, "item");
setintfield(L, -1, "time", 0);
}
lua_newtable(L); // decremented input table
lua_pushstring(L, method_s.c_str());
lua_setfield(L, -2, "method");
lua_pushinteger(L, width);
lua_setfield(L, -2, "width");
push_items(L, input.items);
lua_setfield(L, -2, "items");
return 2;
}
void push_craft_recipe(lua_State *L, IGameDef *gdef,
const CraftDefinition *recipe,
const CraftOutput &tmpout)
{
CraftInput input = recipe->getInput(tmpout, gdef);
CraftOutput output = recipe->getOutput(input, gdef);
lua_newtable(L); // items
std::vector<ItemStack>::const_iterator iter = input.items.begin();
for (u16 j = 1; iter != input.items.end(); iter++, j++) {
if (iter->empty())
continue;
lua_pushstring(L, iter->name.c_str());
lua_rawseti(L, -2, j);
}
lua_setfield(L, -2, "items");
setintfield(L, -1, "width", input.width);
switch (input.method) {
case CRAFT_METHOD_NORMAL:
lua_pushstring(L, "normal");
break;
case CRAFT_METHOD_COOKING:
lua_pushstring(L, "cooking");
break;
case CRAFT_METHOD_FUEL:
lua_pushstring(L, "fuel");
break;
default:
lua_pushstring(L, "unknown");
}
lua_setfield(L, -2, "type");
lua_pushstring(L, tmpout.item.c_str());
lua_setfield(L, -2, "output");
}
void push_craft_recipes(lua_State *L, IGameDef *gdef,
const std::vector<CraftDefinition*> &recipes,
const CraftOutput &output)
{
lua_createtable(L, recipes.size(), 0);
if (recipes.empty()) {
lua_pushnil(L);
return;
}
std::vector<CraftDefinition*>::const_iterator it = recipes.begin();
for (unsigned i = 0; it != recipes.end(); ++it) {
lua_newtable(L);
push_craft_recipe(L, gdef, *it, output);
lua_rawseti(L, -2, ++i);
}
}
// get_craft_recipe(result item)
int ModApiCraft::l_get_craft_recipe(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
std::string item = luaL_checkstring(L, 1);
Server *server = getServer(L);
CraftOutput output(item, 0);
std::vector<CraftDefinition*> recipes = server->cdef()
->getCraftRecipes(output, server, 1);
lua_createtable(L, 1, 0);
if (recipes.empty()) {
lua_pushnil(L);
lua_setfield(L, -2, "items");
setintfield(L, -1, "width", 0);
return 1;
}
push_craft_recipe(L, server, recipes[0], output);
return 1;
}
// get_all_craft_recipes(result item)
int ModApiCraft::l_get_all_craft_recipes(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
std::string item = luaL_checkstring(L, 1);
Server *server = getServer(L);
CraftOutput output(item, 0);
std::vector<CraftDefinition*> recipes = server->cdef()
->getCraftRecipes(output, server);
push_craft_recipes(L, server, recipes, output);
return 1;
}
void ModApiCraft::Initialize(lua_State *L, int top)
{
API_FCT(get_all_craft_recipes);
API_FCT(get_craft_recipe);
API_FCT(get_craft_result);
API_FCT(register_craft);
}