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/*
Minetest
Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
Copyright (C) 2013 Kahrl <kahrl@gmx.net>

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.
*/

#pragma once

#include "irrlichttypes_extrabloated.h"
#include <string>
#include <iostream>
#include <set>
#include "itemgroup.h"
#include "sound.h"
class IGameDef;
class Client;
struct ToolCapabilities;
#ifndef SERVER
#include "client/tile.h"
struct ItemMesh;
struct ItemStack;
#endif

/*
	Base item definition
*/

enum ItemType
{
	ITEM_NONE,
	ITEM_NODE,
	ITEM_CRAFT,
	ITEM_TOOL,
};

struct ItemDefinition
{
	/*
		Basic item properties
	*/
	ItemType type;
	std::string name; // "" = hand
	std::string description; // Shown in tooltip.

	/*
		Visual properties
	*/
	std::string inventory_image; // Optional for nodes, mandatory for tools/craftitems
	std::string inventory_overlay; // Overlay of inventory_image.
	std::string wield_image; // If empty, inventory_image or mesh (only nodes) is used
	std::string wield_overlay; // Overlay of wield_image.
	std::string palette_image; // If specified, the item will be colorized based on this
	video::SColor color; // The fallback color of the node.
	v3f wield_scale;

	/*
		Item stack and interaction properties
	*/
	u16 stack_max;
	bool usable;
	bool liquids_pointable;
	// May be NULL. If non-NULL, deleted by destructor
	ToolCapabilities *tool_capabilities;
	ItemGroupList groups;
	SimpleSoundSpec sound_place;
	SimpleSoundSpec sound_place_failed;
	f32 range;

	// Client shall immediately place this node when player places the item.
	// Server will update the precise end result a moment later.
	// "" = no prediction
	std::string node_placement_prediction;

	/*
		Some helpful methods
	*/
	ItemDefinition();
	ItemDefinition(const ItemDefinition &def);
	ItemDefinition& operator=(const ItemDefinition &def);
	~ItemDefinition();
	void reset();
	void serialize(std::ostream &os, u16 protocol_version) const;
	void deSerialize(std::istream &is);
private:
	void resetInitial();
};

class IItemDefManager
{
public:
	IItemDefManager() = default;

	virtual ~IItemDefManager() = default;

	// Get item definition
	virtual const ItemDefinition& get(const std::string &name) const=0;
	// Get alias definition
	virtual const std::string &getAlias(const std::string &name) const=0;
	// Get set of all defined item names and aliases
	virtual void getAll(std::set<std::string> &result) const=0;
	// Check if item is known
	virtual bool isKnown(const std::string &name) const=0;
#ifndef SERVER
	// Get item inventory texture
	virtual video::ITexture* getInventoryTexture(const std::string &name,
			Client *client) const=0;
	// Get item wield mesh
	virtual ItemMesh* getWieldMesh(const std::string &name,
		Client *client) const=0;
	// Get item palette
	virtual Palette* getPalette(const std::string &name,
		Client *client) const = 0;
	// Returns the base color of an item stack: the color of all
	// tiles that do not define their own color.
	virtual video::SColor getItemstackColor(const ItemStack &stack,
		Client *client) const = 0;
#endif

	virtual void serialize(std::ostream &os, u16 protocol_version)=0;
};

class IWritableItemDefManager : public IItemDefManager
{
public:
	IWritableItemDefManager() = default;

	virtual ~IWritableItemDefManager() = default;

	// Get item definition
	virtual const ItemDefinition& get(const std::string &name) const=0;
	// Get alias definition
	virtual const std::string &getAlias(const std::string &name) const=0;
	// Get set of all defined item names and aliases
	virtual void getAll(std::set<std::string> &result) const=0;
	// Check if item is known
	virtual bool isKnown(const std::string &name) const=0;
#ifndef SERVER
	// Get item inventory texture
	virtual video::ITexture* getInventoryTexture(const std::string &name,
			Client *client) const=0;
	// Get item wield mesh
	virtual ItemMesh* getWieldMesh(const std::string &name,
		Client *client) const=0;
#endif

	// Remove all registered item and node definitions and aliases
	// Then re-add the builtin item definitions
	virtual void clear()=0;
	// Register item definition
	virtual void registerItem(const ItemDefinition &def)=0;
	virtual void unregisterItem(const std::string &name)=0;
	// Set an alias so that items named <name> will load as <convert_to>.
	// Alias is not set if <name> has already been defined.
	// Alias will be removed if <name> is defined at a later point of time.
	virtual void registerAlias(const std::string &name,
			const std::string &convert_to)=0;

	virtual void serialize(std::ostream &os, u16 protocol_version)=0;
	virtual void deSerialize(std::istream &is)=0;

	// Do stuff asked by threads that can only be done in the main thread
	virtual void processQueue(IGameDef *gamedef)=0;
};

IWritableItemDefManager* createItemDefManager();
span class="hl kwb">void RollbackAction::fromStream(std::istream &is) throw(SerializationError) { int c = is.get(); if(c != '['){ is.putback(c); throw SerializationError("RollbackAction: starting [ not found"); } std::string id; std::getline(is, id, ' '); if(id == "set_node") { c = is.get(); if(c != '('){ is.putback(c); throw SerializationError("RollbackAction: starting ( not found"); } // Position std::string px_raw; std::string py_raw; std::string pz_raw; std::getline(is, px_raw, ','); std::getline(is, py_raw, ','); std::getline(is, pz_raw, ')'); c = is.get(); if(c != ' '){ is.putback(c); throw SerializationError("RollbackAction: after-p ' ' not found"); } v3s16 loaded_p(stoi(px_raw), stoi(py_raw), stoi(pz_raw)); // Old node std::string old_name; try{ old_name = deSerializeJsonString(is); }catch(SerializationError &e){ errorstream<<"Serialization error in RollbackAction::fromStream(): " <<"old_name: "<<e.what()<<std::endl; throw e; } c = is.get(); if(c != ' '){ is.putback(c); throw SerializationError("RollbackAction: after-old_name ' ' not found"); } std::string old_p1_raw; std::string old_p2_raw; std::getline(is, old_p1_raw, ' '); std::getline(is, old_p2_raw, ' '); int old_p1 = stoi(old_p1_raw); int old_p2 = stoi(old_p2_raw); std::string old_meta; try{ old_meta = deSerializeJsonString(is); }catch(SerializationError &e){ errorstream<<"Serialization error in RollbackAction::fromStream(): " <<"old_meta: "<<e.what()<<std::endl; throw e; } c = is.get(); if(c != ' '){ is.putback(c); throw SerializationError("RollbackAction: after-old_meta ' ' not found"); } // New node std::string new_name; try{ new_name = deSerializeJsonString(is); }catch(SerializationError &e){ errorstream<<"Serialization error in RollbackAction::fromStream(): " <<"new_name: "<<e.what()<<std::endl; throw e; } c = is.get(); if(c != ' '){ is.putback(c); throw SerializationError("RollbackAction: after-new_name ' ' not found"); } std::string new_p1_raw; std::string new_p2_raw; std::getline(is, new_p1_raw, ' '); std::getline(is, new_p2_raw, ' '); int new_p1 = stoi(new_p1_raw); int new_p2 = stoi(new_p2_raw); std::string new_meta; try{ new_meta = deSerializeJsonString(is); }catch(SerializationError &e){ errorstream<<"Serialization error in RollbackAction::fromStream(): " <<"new_meta: "<<e.what()<<std::endl; throw e; } c = is.get(); if(c != ']'){ is.putback(c); throw SerializationError("RollbackAction: after-new_meta ] not found"); } // Set values type = TYPE_SET_NODE; p = loaded_p; n_old.name = old_name; n_old.param1 = old_p1; n_old.param2 = old_p2; n_old.meta = old_meta; n_new.name = new_name; n_new.param1 = new_p1; n_new.param2 = new_p2; n_new.meta = new_meta; } else if(id == "modify_inventory_stack") { // Location std::string location; try{ location = deSerializeJsonString(is); }catch(SerializationError &e){ errorstream<<"Serialization error in RollbackAction::fromStream(): " <<"location: "<<e.what()<<std::endl; throw e; } c = is.get(); if(c != ' '){ is.putback(c); throw SerializationError("RollbackAction: after-loc ' ' not found"); } // List std::string listname; try{ listname = deSerializeJsonString(is); }catch(SerializationError &e){ errorstream<<"Serialization error in RollbackAction::fromStream(): " <<"listname: "<<e.what()<<std::endl; throw e; } c = is.get(); if(c != ' '){ is.putback(c); throw SerializationError("RollbackAction: after-list ' ' not found"); } // Index std::string index_raw; std::getline(is, index_raw, ' '); // add/remove std::string addremove; std::getline(is, addremove, ' '); if(addremove != "add" && addremove != "remove"){ throw SerializationError("RollbackAction: addremove is not add or remove"); } // Itemstring std::string stack; try{ stack = deSerializeJsonString(is); }catch(SerializationError &e){ errorstream<<"Serialization error in RollbackAction::fromStream(): " <<"stack: "<<e.what()<<std::endl; throw e; } // Set values type = TYPE_MODIFY_INVENTORY_STACK; inventory_location = location; inventory_list = listname; inventory_index = stoi(index_raw); inventory_add = (addremove == "add"); inventory_stack = stack; } else { throw SerializationError("RollbackAction: Unknown id"); } } bool RollbackAction::isImportant(IGameDef *gamedef) const { switch(type){ case TYPE_SET_NODE: { // If names differ, action is always important if(n_old.name != n_new.name) return true; // If metadata differs, action is always important if(n_old.meta != n_new.meta) return true; INodeDefManager *ndef = gamedef->ndef(); // Both are of the same name, so a single definition is needed const ContentFeatures &def = ndef->get(n_old.name); // If the type is flowing liquid, action is not important if(def.liquid_type == LIQUID_FLOWING) return false; // Otherwise action is important return true; } default: return true; } } bool RollbackAction::getPosition(v3s16 *dst) const { switch(type){ case RollbackAction::TYPE_SET_NODE: if(dst) *dst = p; return true; case RollbackAction::TYPE_MODIFY_INVENTORY_STACK: { InventoryLocation loc; loc.deSerialize(inventory_location); if(loc.type != InventoryLocation::NODEMETA) return false; if(dst) *dst = loc.p; return true; } default: return false; } } bool RollbackAction::applyRevert(Map *map, InventoryManager *imgr, IGameDef *gamedef) const { try{ switch(type){ case TYPE_NOTHING: return true; case TYPE_SET_NODE: { INodeDefManager *ndef = gamedef->ndef(); // Make sure position is loaded from disk map->emergeBlock(getContainerPos(p, MAP_BLOCKSIZE), false); // Check current node MapNode current_node = map->getNodeNoEx(p); std::string current_name = ndef->get(current_node).name; // If current node not the new node, it's bad if(current_name != n_new.name) return false; /*// If current node not the new node and not ignore, it's bad if(current_name != n_new.name && current_name != "ignore") return false;*/ // Create rollback node MapNode n(ndef, n_old.name, n_old.param1, n_old.param2); // Set rollback node try{ if(!map->addNodeWithEvent(p, n)){ infostream<<"RollbackAction::applyRevert(): " <<"AddNodeWithEvent failed at " <<PP(p)<<" for "<<n_old.name<<std::endl; return false; } NodeMetadata *meta = map->getNodeMetadata(p); if(n_old.meta != ""){ if(!meta){ meta = new NodeMetadata(gamedef); if(!map->setNodeMetadata(p, meta)){ delete meta; infostream<<"RollbackAction::applyRevert(): " <<"setNodeMetadata failed at " <<PP(p)<<" for "<<n_old.name<<std::endl; return false; } } std::istringstream is(n_old.meta, std::ios::binary); meta->deSerialize(is); } else { map->removeNodeMetadata(p); } // NOTE: This same code is in scriptapi.cpp // Inform other things that the metadata has changed v3s16 blockpos = getContainerPos(p, MAP_BLOCKSIZE); MapEditEvent event; event.type = MEET_BLOCK_NODE_METADATA_CHANGED; event.p = blockpos; map->dispatchEvent(&event); // Set the block to be saved MapBlock *block = map->getBlockNoCreateNoEx(blockpos); if(block) block->raiseModified(MOD_STATE_WRITE_NEEDED, "NodeMetaRef::reportMetadataChange"); }catch(InvalidPositionException &e){ infostream<<"RollbackAction::applyRevert(): " <<"InvalidPositionException: "<<e.what()<<std::endl; return false; } // Success return true; } case TYPE_MODIFY_INVENTORY_STACK: { InventoryLocation loc; loc.deSerialize(inventory_location); ItemStack stack; stack.deSerialize(inventory_stack, gamedef->idef()); Inventory *inv = imgr->getInventory(loc); if(!inv){ infostream<<"RollbackAction::applyRevert(): Could not get " "inventory at "<<inventory_location<<std::endl; return false; } InventoryList *list = inv->getList(inventory_list); if(!list){ infostream<<"RollbackAction::applyRevert(): Could not get " "inventory list \""<<inventory_list<<"\" in " <<inventory_location<<std::endl; return false; } if(list->getSize() <= inventory_index){ infostream<<"RollbackAction::applyRevert(): List index " <<inventory_index<<" too large in " <<"inventory list \""<<inventory_list<<"\" in " <<inventory_location<<std::endl; } // If item was added, take away item, otherwise add removed item if(inventory_add){ // Silently ignore different current item if(list->getItem(inventory_index).name != stack.name) return false; list->takeItem(inventory_index, stack.count); } else { list->addItem(inventory_index, stack); } // Inventory was modified; send to clients imgr->setInventoryModified(loc); return true; } default: errorstream<<"RollbackAction::applyRevert(): type not handled" <<std::endl; return false; } }catch(SerializationError &e){ errorstream<<"RollbackAction::applyRevert(): n_old.name="<<n_old.name <<", SerializationError: "<<e.what()<<std::endl; } return false; }