src/nodemetadata.cpp

   1 /*
   2 Minetest-c55
   3 Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "nodemetadata.h"
  21 #include "utility.h"
  22 #include "mapnode.h"
  23 #include "exceptions.h"
  24 #include "inventory.h"
  25 #include <sstream>
  26
  27 /*
  28         NodeMetadata
  29 */
  30
  31 core::map<u16, NodeMetadata::Factory> NodeMetadata::m_types;
  32
  33 NodeMetadata::NodeMetadata()
  34 {
  35 }
  36
  37 NodeMetadata::~NodeMetadata()
  38 {
  39 }
  40
  41 NodeMetadata* NodeMetadata::deSerialize(std::istream &is)
  42 {
  43         // Read id
  44         u8 buf[2];
  45         is.read((char*)buf, 2);
  46         s16 id = readS16(buf);
  47
  48         // Read data
  49         std::string data = deSerializeString(is);
  50
  51         // Find factory function
  52         core::map<u16, Factory>::Node *n;
  53         n = m_types.find(id);
  54         if(n == NULL)
  55         {
  56                 // If factory is not found, just return.
  57                 dstream<<"WARNING: NodeMetadata: No factory for typeId="
  58                                 <<id<<std::endl;
  59                 return NULL;
  60         }
  61
  62         // Try to load the metadata. If it fails, just return.
  63         try
  64         {
  65                 std::istringstream iss(data, std::ios_base::binary);
  66
  67                 Factory f = n->getValue();
  68                 NodeMetadata *meta = (*f)(iss);
  69                 return meta;
  70         }
  71         catch(SerializationError &e)
  72         {
  73                 dstream<<"WARNING: NodeMetadata: ignoring SerializationError"<<std::endl;
  74                 return NULL;
  75         }
  76 }
  77
  78 void NodeMetadata::serialize(std::ostream &os)
  79 {
  80         u8 buf[2];
  81         writeU16(buf, typeId());
  82         os.write((char*)buf, 2);
  83
  84         std::ostringstream oss(std::ios_base::binary);
  85         serializeBody(oss);
  86         os<<serializeString(oss.str());
  87 }
  88
  89 void NodeMetadata::registerType(u16 id, Factory f)
  90 {
  91         core::map<u16, Factory>::Node *n;
  92         n = m_types.find(id);
  93         if(n)
  94                 return;
  95         m_types.insert(id, f);
  96 }
  97
  98 /*
  99         SignNodeMetadata
 100 */
 101
 102 // Prototype
 103 SignNodeMetadata proto_SignNodeMetadata("");
 104
 105 SignNodeMetadata::SignNodeMetadata(std::string text):
 106         m_text(text)
 107 {
 108         NodeMetadata::registerType(typeId(), create);
 109 }
 110 u16 SignNodeMetadata::typeId() const
 111 {
 112         return CONTENT_SIGN_WALL;
 113 }
 114 NodeMetadata* SignNodeMetadata::create(std::istream &is)
 115 {
 116         std::string text = deSerializeString(is);
 117         return new SignNodeMetadata(text);
 118 }
 119 NodeMetadata* SignNodeMetadata::clone()
 120 {
 121         return new SignNodeMetadata(m_text);
 122 }
 123 void SignNodeMetadata::serializeBody(std::ostream &os)
 124 {
 125         os<<serializeString(m_text);
 126 }
 127 std::string SignNodeMetadata::infoText()
 128 {
 129         return std::string("\"")+m_text+"\"";
 130 }
 131
 132 /*
 133         ChestNodeMetadata
 134 */
 135
 136 // Prototype
 137 ChestNodeMetadata proto_ChestNodeMetadata;
 138
 139 ChestNodeMetadata::ChestNodeMetadata()
 140 {
 141         NodeMetadata::registerType(typeId(), create);
 142
 143         m_inventory = new Inventory();
 144         m_inventory->addList("0", 8*4);
 145 }
 146 ChestNodeMetadata::~ChestNodeMetadata()
 147 {
 148         delete m_inventory;
 149 }
 150 u16 ChestNodeMetadata::typeId() const
 151 {
 152         return CONTENT_CHEST;
 153 }
 154 NodeMetadata* ChestNodeMetadata::create(std::istream &is)
 155 {
 156         ChestNodeMetadata *d = new ChestNodeMetadata();
 157         d->m_inventory->deSerialize(is);
 158         return d;
 159 }
 160 NodeMetadata* ChestNodeMetadata::clone()
 161 {
 162         ChestNodeMetadata *d = new ChestNodeMetadata();
 163         *d->m_inventory = *m_inventory;
 164         return d;
 165 }
 166 void ChestNodeMetadata::serializeBody(std::ostream &os)
 167 {
 168         m_inventory->serialize(os);
 169 }
 170 std::string ChestNodeMetadata::infoText()
 171 {
 172         return "Chest";
 173 }
 174 bool ChestNodeMetadata::nodeRemovalDisabled()
 175 {
 176         /*
 177                 Disable removal if chest contains something
 178         */
 179         InventoryList *list = m_inventory->getList("0");
 180         if(list == NULL)
 181                 return false;
 182         if(list->getUsedSlots() == 0)
 183                 return false;
 184         return true;
 185 }
 186
 187 /*
 188         FurnaceNodeMetadata
 189 */
 190
 191 // Prototype
 192 FurnaceNodeMetadata proto_FurnaceNodeMetadata;
 193
 194 FurnaceNodeMetadata::FurnaceNodeMetadata()
 195 {
 196         NodeMetadata::registerType(typeId(), create);
 197
 198         m_inventory = new Inventory();
 199         m_inventory->addList("fuel", 1);
 200         m_inventory->addList("src", 1);
 201         m_inventory->addList("dst", 4);
 202
 203         m_step_accumulator = 0;
 204         m_fuel_totaltime = 0;
 205         m_fuel_time = 0;
 206         m_src_totaltime = 0;
 207         m_src_time = 0;
 208 }
 209 FurnaceNodeMetadata::~FurnaceNodeMetadata()
 210 {
 211         delete m_inventory;
 212 }
 213 u16 FurnaceNodeMetadata::typeId() const
 214 {
 215         return CONTENT_FURNACE;
 216 }
 217 NodeMetadata* FurnaceNodeMetadata::clone()
 218 {
 219         FurnaceNodeMetadata *d = new FurnaceNodeMetadata();
 220         *d->m_inventory = *m_inventory;
 221         return d;
 222 }
 223 NodeMetadata* FurnaceNodeMetadata::create(std::istream &is)
 224 {
 225         FurnaceNodeMetadata *d = new FurnaceNodeMetadata();
 226
 227         d->m_inventory->deSerialize(is);
 228
 229         int temp;
 230         is>>temp;
 231         d->m_fuel_totaltime = (float)temp/10;
 232         is>>temp;
 233         d->m_fuel_time = (float)temp/10;
 234
 235         return d;
 236 }
 237 void FurnaceNodeMetadata::serializeBody(std::ostream &os)
 238 {
 239         m_inventory->serialize(os);
 240         os<<itos(m_fuel_totaltime*10)<<" ";
 241         os<<itos(m_fuel_time*10)<<" ";
 242 }
 243 std::string FurnaceNodeMetadata::infoText()
 244 {
 245         //return "Furnace";
 246         if(m_fuel_time >= m_fuel_totaltime)
 247         {
 248                 InventoryList *src_list = m_inventory->getList("src");
 249                 assert(src_list);
 250                 InventoryItem *src_item = src_list->getItem(0);
 251
 252                 if(src_item)
 253                         return "Furnace is out of fuel";
 254                 else
 255                         return "Furnace is inactive";
 256         }
 257         else
 258         {
 259                 std::string s = "Furnace is active (";
 260                 s += itos(m_fuel_time/m_fuel_totaltime*100);
 261                 s += "%)";
 262                 return s;
 263         }
 264 }
 265 void FurnaceNodeMetadata::inventoryModified()
 266 {
 267         dstream<<"Furnace inventory modification callback"<<std::endl;
 268 }
 269 bool FurnaceNodeMetadata::step(float dtime)
 270 {
 271         // Update at a fixed frequency
 272         const float interval = 0.5;
 273         m_step_accumulator += dtime;
 274         if(m_step_accumulator < interval)
 275                 return false;
 276         m_step_accumulator -= interval;
 277         dtime = interval;
 278
 279         //dstream<<"Furnace step dtime="<<dtime<<std::endl;
 280
 281         InventoryList *dst_list = m_inventory->getList("dst");
 282         assert(dst_list);
 283
 284         InventoryList *src_list = m_inventory->getList("src");
 285         assert(src_list);
 286         InventoryItem *src_item = src_list->getItem(0);
 287
 288         // Start only if there are free slots in dst, so that it can
 289         // accomodate any result item
 290         if(dst_list->getFreeSlots() > 0 && src_item && src_item->isCookable())
 291         {
 292                 m_src_totaltime = 3;
 293         }
 294         else
 295         {
 296                 m_src_time = 0;
 297                 m_src_totaltime = 0;
 298         }
 299
 300         if(m_fuel_time < m_fuel_totaltime)
 301         {
 302                 //dstream<<"Furnace is active"<<std::endl;
 303                 m_fuel_time += dtime;
 304                 m_src_time += dtime;
 305                 if(m_src_time >= m_src_totaltime && m_src_totaltime > 0.001
 306                                 && src_item)
 307                 {
 308                         InventoryItem *cookresult = src_item->createCookResult();
 309                         dst_list->addItem(cookresult);
 310                         src_list->decrementMaterials(1);
 311                         m_src_time = 0;
 312                         m_src_totaltime = 0;
 313                 }
 314                 return true;
 315         }
 316
 317         if(src_item == NULL || m_src_totaltime < 0.001)
 318         {
 319                 return false;
 320         }
 321
 322         bool changed = false;
 323
 324         //dstream<<"Furnace is out of fuel"<<std::endl;
 325
 326         InventoryList *fuel_list = m_inventory->getList("fuel");
 327         assert(fuel_list);
 328         InventoryItem *fuel_item = fuel_list->getItem(0);
 329
 330         if(ItemSpec(ITEM_MATERIAL, CONTENT_TREE).checkItem(fuel_item))
 331         {
 332                 m_fuel_totaltime = 10;
 333                 m_fuel_time = 0;
 334                 fuel_list->decrementMaterials(1);
 335                 changed = true;
 336         }
 337         else if(ItemSpec(ITEM_MATERIAL, CONTENT_WOOD).checkItem(fuel_item))
 338         {
 339                 m_fuel_totaltime = 5;
 340                 m_fuel_time = 0;
 341                 fuel_list->decrementMaterials(1);
 342                 changed = true;
 343         }
 344         else if(ItemSpec(ITEM_CRAFT, "lump_of_coal").checkItem(fuel_item))
 345         {
 346                 m_fuel_totaltime = 10;
 347                 m_fuel_time = 0;
 348                 fuel_list->decrementMaterials(1);
 349                 changed = true;
 350         }
 351         else
 352         {
 353                 //dstream<<"No fuel found"<<std::endl;
 354         }
 355
 356         return changed;
 357 }
 358
 359 /*
 360         NodeMetadatalist
 361 */
 362
 363 void NodeMetadataList::serialize(std::ostream &os)
 364 {
 365         u8 buf[6];
 366
 367         u16 version = 1;
 368         writeU16(buf, version);
 369         os.write((char*)buf, 2);
 370
 371         u16 count = m_data.size();
 372         writeU16(buf, count);
 373         os.write((char*)buf, 2);
 374
 375         for(core::map<v3s16, NodeMetadata*>::Iterator
 376                         i = m_data.getIterator();
 377                         i.atEnd()==false; i++)
 378         {
 379                 v3s16 p = i.getNode()->getKey();
 380                 NodeMetadata *data = i.getNode()->getValue();
 381
 382                 u16 p16 = p.Z*MAP_BLOCKSIZE*MAP_BLOCKSIZE + p.Y*MAP_BLOCKSIZE + p.X;
 383                 writeU16(buf, p16);
 384                 os.write((char*)buf, 2);
 385
 386                 data->serialize(os);
 387         }
 388
 389 }
 390 void NodeMetadataList::deSerialize(std::istream &is)
 391 {
 392         m_data.clear();
 393
 394         u8 buf[6];
 395
 396         is.read((char*)buf, 2);
 397         u16 version = readU16(buf);
 398
 399         if(version > 1)
 400         {
 401                 dstream<<__FUNCTION_NAME<<": version "<<version<<" not supported"
 402                                 <<std::endl;
 403                 throw SerializationError("NodeMetadataList::deSerialize");
 404         }
 405
 406         is.read((char*)buf, 2);
 407         u16 count = readU16(buf);
 408
 409         for(u16 i=0; i<count; i++)
 410         {
 411                 is.read((char*)buf, 2);
 412                 u16 p16 = readU16(buf);
 413
 414                 v3s16 p(0,0,0);
 415                 p.Z += p16 / MAP_BLOCKSIZE / MAP_BLOCKSIZE;
 416                 p16 -= p.Z * MAP_BLOCKSIZE * MAP_BLOCKSIZE;
 417                 p.Y += p16 / MAP_BLOCKSIZE;
 418                 p16 -= p.Y * MAP_BLOCKSIZE;
 419                 p.X += p16;
 420
 421                 NodeMetadata *data = NodeMetadata::deSerialize(is);
 422
 423                 if(data == NULL)
 424                         continue;
 425
 426                 if(m_data.find(p))
 427                 {
 428                         dstream<<"WARNING: NodeMetadataList::deSerialize(): "
 429                                         <<"already set data at position"
 430                                         <<"("<<p.X<<","<<p.Y<<","<<p.Z<<"): Ignoring."
 431                                         <<std::endl;
 432                         delete data;
 433                         continue;
 434                 }
 435
 436                 m_data.insert(p, data);
 437         }
 438 }
 439
 440 NodeMetadataList::~NodeMetadataList()
 441 {
 442         for(core::map<v3s16, NodeMetadata*>::Iterator
 443                         i = m_data.getIterator();
 444                         i.atEnd()==false; i++)
 445         {
 446                 delete i.getNode()->getValue();
 447         }
 448 }
 449
 450 NodeMetadata* NodeMetadataList::get(v3s16 p)
 451 {
 452         core::map<v3s16, NodeMetadata*>::Node *n;
 453         n = m_data.find(p);
 454         if(n == NULL)
 455                 return NULL;
 456         return n->getValue();
 457 }
 458
 459 void NodeMetadataList::remove(v3s16 p)
 460 {
 461         NodeMetadata *olddata = get(p);
 462         if(olddata)
 463         {
 464                 delete olddata;
 465                 m_data.remove(p);
 466         }
 467 }
 468
 469 void NodeMetadataList::set(v3s16 p, NodeMetadata *d)
 470 {
 471         remove(p);
 472         m_data.insert(p, d);
 473 }
 474
 475 bool NodeMetadataList::step(float dtime)
 476 {
 477         bool something_changed = false;
 478         for(core::map<v3s16, NodeMetadata*>::Iterator
 479                         i = m_data.getIterator();
 480                         i.atEnd()==false; i++)
 481         {
 482                 v3s16 p = i.getNode()->getKey();
 483                 NodeMetadata *meta = i.getNode()->getValue();
 484                 bool changed = meta->step(dtime);
 485                 if(changed)
 486                         something_changed = true;
 487                 /*if(res.inventory_changed)
 488                 {
 489                         std::string inv_id;
 490                         inv_id += "nodemeta:";
 491                         inv_id += itos(p.X);
 492                         inv_id += ",";
 493                         inv_id += itos(p.Y);
 494                         inv_id += ",";
 495                         inv_id += itos(p.Z);
 496                         InventoryContext c;
 497                         c.current_player = NULL;
 498                         inv_mgr->inventoryModified(&c, inv_id);
 499                 }*/
 500         }
 501         return something_changed;
 502 }
 503