src/inventorymanager.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 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 Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser 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 "inventorymanager.h"
  21 #include "debug.h"
  22 #include "log.h"
  23 #include "serverenvironment.h"
  24 #include "scripting_server.h"
  25 #include "serverobject.h"
  26 #include "settings.h"
  27 #include "craftdef.h"
  28 #include "rollback_interface.h"
  29 #include "util/strfnd.h"
  30 #include "util/basic_macros.h"
  31
  32 #define PLAYER_TO_SA(p)   p->getEnv()->getScriptIface()
  33
  34 /*
  35         InventoryLocation
  36 */
  37
  38 std::string InventoryLocation::dump() const
  39 {
  40         std::ostringstream os(std::ios::binary);
  41         serialize(os);
  42         return os.str();
  43 }
  44
  45 void InventoryLocation::serialize(std::ostream &os) const
  46 {
  47         switch (type) {
  48         case InventoryLocation::UNDEFINED:
  49                 os<<"undefined";
  50                 break;
  51         case InventoryLocation::CURRENT_PLAYER:
  52                 os<<"current_player";
  53                 break;
  54         case InventoryLocation::PLAYER:
  55                 os<<"player:"<<name;
  56                 break;
  57         case InventoryLocation::NODEMETA:
  58                 os<<"nodemeta:"<<p.X<<","<<p.Y<<","<<p.Z;
  59                 break;
  60         case InventoryLocation::DETACHED:
  61                 os<<"detached:"<<name;
  62                 break;
  63         default:
  64                 FATAL_ERROR("Unhandled inventory location type");
  65         }
  66 }
  67
  68 void InventoryLocation::deSerialize(std::istream &is)
  69 {
  70         std::string tname;
  71         std::getline(is, tname, ':');
  72         if (tname == "undefined") {
  73                 type = InventoryLocation::UNDEFINED;
  74         } else if (tname == "current_player") {
  75                 type = InventoryLocation::CURRENT_PLAYER;
  76         } else if (tname == "player") {
  77                 type = InventoryLocation::PLAYER;
  78                 std::getline(is, name, '\n');
  79         } else if (tname == "nodemeta") {
  80                 type = InventoryLocation::NODEMETA;
  81                 std::string pos;
  82                 std::getline(is, pos, '\n');
  83                 Strfnd fn(pos);
  84                 p.X = stoi(fn.next(","));
  85                 p.Y = stoi(fn.next(","));
  86                 p.Z = stoi(fn.next(","));
  87         } else if (tname == "detached") {
  88                 type = InventoryLocation::DETACHED;
  89                 std::getline(is, name, '\n');
  90         } else {
  91                 infostream<<"Unknown InventoryLocation type=\""<<tname<<"\""<<std::endl;
  92                 throw SerializationError("Unknown InventoryLocation type");
  93         }
  94 }
  95
  96 void InventoryLocation::deSerialize(const std::string &s)
  97 {
  98         std::istringstream is(s, std::ios::binary);
  99         deSerialize(is);
 100 }
 101
 102 /*
 103         InventoryAction
 104 */
 105
 106 InventoryAction *InventoryAction::deSerialize(std::istream &is)
 107 {
 108         std::string type;
 109         std::getline(is, type, ' ');
 110
 111         InventoryAction *a = nullptr;
 112
 113         if (type == "Move") {
 114                 a = new IMoveAction(is, false);
 115         } else if (type == "MoveSomewhere") {
 116                 a = new IMoveAction(is, true);
 117         } else if (type == "Drop") {
 118                 a = new IDropAction(is);
 119         } else if (type == "Craft") {
 120                 a = new ICraftAction(is);
 121         }
 122
 123         return a;
 124 }
 125
 126 /*
 127         IMoveAction
 128 */
 129
 130 IMoveAction::IMoveAction(std::istream &is, bool somewhere) :
 131                 move_somewhere(somewhere)
 132 {
 133         std::string ts;
 134
 135         std::getline(is, ts, ' ');
 136         count = stoi(ts);
 137
 138         std::getline(is, ts, ' ');
 139         from_inv.deSerialize(ts);
 140
 141         std::getline(is, from_list, ' ');
 142
 143         std::getline(is, ts, ' ');
 144         from_i = stoi(ts);
 145
 146         std::getline(is, ts, ' ');
 147         to_inv.deSerialize(ts);
 148
 149         std::getline(is, to_list, ' ');
 150
 151         if (!somewhere) {
 152                 std::getline(is, ts, ' ');
 153                 to_i = stoi(ts);
 154         }
 155 }
 156
 157 void IMoveAction::apply(InventoryManager *mgr, ServerActiveObject *player, IGameDef *gamedef)
 158 {
 159         Inventory *inv_from = mgr->getInventory(from_inv);
 160         Inventory *inv_to = mgr->getInventory(to_inv);
 161
 162         if (!inv_from) {
 163                 infostream << "IMoveAction::apply(): FAIL: source inventory not found: "
 164                         << "from_inv=\""<<from_inv.dump() << "\""
 165                         << ", to_inv=\"" << to_inv.dump() << "\"" << std::endl;
 166                 return;
 167         }
 168         if (!inv_to) {
 169                 infostream << "IMoveAction::apply(): FAIL: destination inventory not found: "
 170                         << "from_inv=\"" << from_inv.dump() << "\""
 171                         << ", to_inv=\"" << to_inv.dump() << "\"" << std::endl;
 172                 return;
 173         }
 174
 175         InventoryList *list_from = inv_from->getList(from_list);
 176         InventoryList *list_to = inv_to->getList(to_list);
 177
 178         /*
 179                 If a list doesn't exist or the source item doesn't exist
 180         */
 181         if (!list_from) {
 182                 infostream << "IMoveAction::apply(): FAIL: source list not found: "
 183                         << "from_inv=\"" << from_inv.dump() << "\""
 184                         << ", from_list=\"" << from_list << "\"" << std::endl;
 185                 return;
 186         }
 187         if (!list_to) {
 188                 infostream << "IMoveAction::apply(): FAIL: destination list not found: "
 189                         << "to_inv=\""<<to_inv.dump() << "\""
 190                         << ", to_list=\"" << to_list << "\"" << std::endl;
 191                 return;
 192         }
 193
 194         if (move_somewhere) {
 195                 s16 old_to_i = to_i;
 196                 u16 old_count = count;
 197                 caused_by_move_somewhere = true;
 198                 move_somewhere = false;
 199
 200                 infostream << "IMoveAction::apply(): moving item somewhere"
 201                         << " msom=" << move_somewhere
 202                         << " count=" << count
 203                         << " from inv=\"" << from_inv.dump() << "\""
 204                         << " list=\"" << from_list << "\""
 205                         << " i=" << from_i
 206                         << " to inv=\"" << to_inv.dump() << "\""
 207                         << " list=\"" << to_list << "\""
 208                         << std::endl;
 209
 210                 // Try to add the item to destination list
 211                 s16 dest_size = list_to->getSize();
 212                 // First try all the non-empty slots
 213                 for (s16 dest_i = 0; dest_i < dest_size && count > 0; dest_i++) {
 214                         if (!list_to->getItem(dest_i).empty()) {
 215                                 to_i = dest_i;
 216                                 apply(mgr, player, gamedef);
 217                                 count -= move_count;
 218                         }
 219                 }
 220
 221                 // Then try all the empty ones
 222                 for (s16 dest_i = 0; dest_i < dest_size && count > 0; dest_i++) {
 223                         if (list_to->getItem(dest_i).empty()) {
 224                                 to_i = dest_i;
 225                                 apply(mgr, player, gamedef);
 226                                 count -= move_count;
 227                         }
 228                 }
 229
 230                 to_i = old_to_i;
 231                 count = old_count;
 232                 caused_by_move_somewhere = false;
 233                 move_somewhere = true;
 234                 return;
 235         }
 236
 237         if ((u16)to_i > list_to->getSize()) {
 238                 infostream << "IMoveAction::apply(): FAIL: destination index out of bounds: "
 239                         << "to_i=" << to_i
 240                         << ", size=" << list_to->getSize() << std::endl;
 241                 return;
 242         }
 243         /*
 244                 Do not handle rollback if both inventories are that of the same player
 245         */
 246         bool ignore_rollback = (
 247                 from_inv.type == InventoryLocation::PLAYER &&
 248                 from_inv == to_inv);
 249
 250         /*
 251                 Collect information of endpoints
 252         */
 253
 254         int try_take_count = count;
 255         if (try_take_count == 0)
 256                 try_take_count = list_from->getItem(from_i).count;
 257
 258         int src_can_take_count = 0xffff;
 259         int dst_can_put_count = 0xffff;
 260
 261         /* Query detached inventories */
 262
 263         // Move occurs in the same detached inventory
 264         if (from_inv.type == InventoryLocation::DETACHED &&
 265                         from_inv == to_inv) {
 266                 src_can_take_count = PLAYER_TO_SA(player)->detached_inventory_AllowMove(
 267                         *this, try_take_count, player);
 268                 dst_can_put_count = src_can_take_count;
 269         } else {
 270                 // Destination is detached
 271                 if (to_inv.type == InventoryLocation::DETACHED) {
 272                         ItemStack src_item = list_from->getItem(from_i);
 273                         src_item.count = try_take_count;
 274                         dst_can_put_count = PLAYER_TO_SA(player)->detached_inventory_AllowPut(
 275                                 *this, src_item, player);
 276                 }
 277                 // Source is detached
 278                 if (from_inv.type == InventoryLocation::DETACHED) {
 279                         ItemStack src_item = list_from->getItem(from_i);
 280                         src_item.count = try_take_count;
 281                         src_can_take_count = PLAYER_TO_SA(player)->detached_inventory_AllowTake(
 282                                 *this, src_item, player);
 283                 }
 284         }
 285
 286         /* Query node metadata inventories */
 287
 288         // Both endpoints are nodemeta
 289         // Move occurs in the same nodemeta inventory
 290         if (from_inv.type == InventoryLocation::NODEMETA &&
 291                         from_inv == to_inv) {
 292                 src_can_take_count = PLAYER_TO_SA(player)->nodemeta_inventory_AllowMove(
 293                         *this, try_take_count, player);
 294                 dst_can_put_count = src_can_take_count;
 295         } else {
 296                 // Destination is nodemeta
 297                 if (to_inv.type == InventoryLocation::NODEMETA) {
 298                         ItemStack src_item = list_from->getItem(from_i);
 299                         src_item.count = try_take_count;
 300                         dst_can_put_count = PLAYER_TO_SA(player)->nodemeta_inventory_AllowPut(
 301                                 *this, src_item, player);
 302                 }
 303                 // Source is nodemeta
 304                 if (from_inv.type == InventoryLocation::NODEMETA) {
 305                         ItemStack src_item = list_from->getItem(from_i);
 306                         src_item.count = try_take_count;
 307                         src_can_take_count = PLAYER_TO_SA(player)->nodemeta_inventory_AllowTake(
 308                                 *this, src_item, player);
 309                 }
 310         }
 311
 312         // Query player inventories
 313
 314         // Move occurs in the same player inventory
 315         if (from_inv.type == InventoryLocation::PLAYER &&
 316                         from_inv == to_inv) {
 317                 src_can_take_count = PLAYER_TO_SA(player)->player_inventory_AllowMove(
 318                         *this, try_take_count, player);
 319                 dst_can_put_count = src_can_take_count;
 320         } else {
 321                 // Destination is a player
 322                 if (to_inv.type == InventoryLocation::PLAYER) {
 323                         ItemStack src_item = list_from->getItem(from_i);
 324                         src_item.count = try_take_count;
 325                         dst_can_put_count = PLAYER_TO_SA(player)->player_inventory_AllowPut(
 326                                 *this, src_item, player);
 327                 }
 328                 // Source is a player
 329                 if (from_inv.type == InventoryLocation::PLAYER) {
 330                         ItemStack src_item = list_from->getItem(from_i);
 331                         src_item.count = try_take_count;
 332                         src_can_take_count = PLAYER_TO_SA(player)->player_inventory_AllowTake(
 333                                 *this, src_item, player);
 334                 }
 335         }
 336
 337         int old_count = count;
 338
 339         /* Modify count according to collected data */
 340         count = try_take_count;
 341         if (src_can_take_count != -1 && count > src_can_take_count)
 342                 count = src_can_take_count;
 343         if (dst_can_put_count != -1 && count > dst_can_put_count)
 344                 count = dst_can_put_count;
 345         /* Limit according to source item count */
 346         if (count > list_from->getItem(from_i).count)
 347                 count = list_from->getItem(from_i).count;
 348
 349         /* If no items will be moved, don't go further */
 350         if (count == 0) {
 351                 infostream<<"IMoveAction::apply(): move was completely disallowed:"
 352                                 <<" count="<<old_count
 353                                 <<" from inv=\""<<from_inv.dump()<<"\""
 354                                 <<" list=\""<<from_list<<"\""
 355                                 <<" i="<<from_i
 356                                 <<" to inv=\""<<to_inv.dump()<<"\""
 357                                 <<" list=\""<<to_list<<"\""
 358                                 <<" i="<<to_i
 359                                 <<std::endl;
 360                 return;
 361         }
 362
 363         ItemStack src_item = list_from->getItem(from_i);
 364         src_item.count = count;
 365         ItemStack from_stack_was = list_from->getItem(from_i);
 366         ItemStack to_stack_was = list_to->getItem(to_i);
 367
 368         /*
 369                 Perform actual move
 370
 371                 If something is wrong (source item is empty, destination is the
 372                 same as source), nothing happens
 373         */
 374         bool did_swap = false;
 375         move_count = list_from->moveItem(from_i,
 376                 list_to, to_i, count, !caused_by_move_somewhere, &did_swap);
 377
 378         // If source is infinite, reset it's stack
 379         if (src_can_take_count == -1) {
 380                 // For the caused_by_move_somewhere == true case we didn't force-put the item,
 381                 // which guarantees there is no leftover, and code below would duplicate the
 382                 // (not replaced) to_stack_was item.
 383                 if (!caused_by_move_somewhere) {
 384                         // If destination stack is of different type and there are leftover
 385                         // items, attempt to put the leftover items to a different place in the
 386                         // destination inventory.
 387                         // The client-side GUI will try to guess if this happens.
 388                         if (from_stack_was.name != to_stack_was.name) {
 389                                 for (u32 i = 0; i < list_to->getSize(); i++) {
 390                                         if (list_to->getItem(i).empty()) {
 391                                                 list_to->changeItem(i, to_stack_was);
 392                                                 break;
 393                                         }
 394                                 }
 395                         }
 396                 }
 397                 if (move_count > 0 || did_swap) {
 398                         list_from->deleteItem(from_i);
 399                         list_from->addItem(from_i, from_stack_was);
 400                 }
 401         }
 402         // If destination is infinite, reset it's stack and take count from source
 403         if (dst_can_put_count == -1) {
 404                 list_to->deleteItem(to_i);
 405                 list_to->addItem(to_i, to_stack_was);
 406                 list_from->deleteItem(from_i);
 407                 list_from->addItem(from_i, from_stack_was);
 408                 list_from->takeItem(from_i, count);
 409         }
 410
 411         infostream << "IMoveAction::apply(): moved"
 412                         << " msom=" << move_somewhere
 413                         << " caused=" << caused_by_move_somewhere
 414                         << " count=" << count
 415                         << " from inv=\"" << from_inv.dump() << "\""
 416                         << " list=\"" << from_list << "\""
 417                         << " i=" << from_i
 418                         << " to inv=\"" << to_inv.dump() << "\""
 419                         << " list=\"" << to_list << "\""
 420                         << " i=" << to_i
 421                         << std::endl;
 422
 423         // If we are inside the move somewhere loop, we don't need to report
 424         // anything if nothing happened (perhaps we don't need to report
 425         // anything for caused_by_move_somewhere == true, but this way its safer)
 426         if (caused_by_move_somewhere && move_count == 0)
 427                 return;
 428
 429         /*
 430                 Record rollback information
 431         */
 432         if (!ignore_rollback && gamedef->rollback()) {
 433                 IRollbackManager *rollback = gamedef->rollback();
 434
 435                 // If source is not infinite, record item take
 436                 if (src_can_take_count != -1) {
 437                         RollbackAction action;
 438                         std::string loc;
 439                         {
 440                                 std::ostringstream os(std::ios::binary);
 441                                 from_inv.serialize(os);
 442                                 loc = os.str();
 443                         }
 444                         action.setModifyInventoryStack(loc, from_list, from_i, false,
 445                                         src_item);
 446                         rollback->reportAction(action);
 447                 }
 448                 // If destination is not infinite, record item put
 449                 if (dst_can_put_count != -1) {
 450                         RollbackAction action;
 451                         std::string loc;
 452                         {
 453                                 std::ostringstream os(std::ios::binary);
 454                                 to_inv.serialize(os);
 455                                 loc = os.str();
 456                         }
 457                         action.setModifyInventoryStack(loc, to_list, to_i, true,
 458                                         src_item);
 459                         rollback->reportAction(action);
 460                 }
 461         }
 462
 463         /*
 464                 Report move to endpoints
 465         */
 466
 467         /* Detached inventories */
 468
 469         // Both endpoints are same detached
 470         if (from_inv.type == InventoryLocation::DETACHED &&
 471                         from_inv == to_inv) {
 472                 PLAYER_TO_SA(player)->detached_inventory_OnMove(
 473                                 *this, count, player);
 474         } else {
 475                 // Destination is detached
 476                 if (to_inv.type == InventoryLocation::DETACHED) {
 477                         PLAYER_TO_SA(player)->detached_inventory_OnPut(
 478                                 *this, src_item, player);
 479                 }
 480                 // Source is detached
 481                 if (from_inv.type == InventoryLocation::DETACHED) {
 482                         PLAYER_TO_SA(player)->detached_inventory_OnTake(
 483                                 *this, src_item, player);
 484                 }
 485         }
 486
 487         /* Node metadata inventories */
 488
 489         // Both endpoints are same nodemeta
 490         if (from_inv.type == InventoryLocation::NODEMETA &&
 491                         from_inv == to_inv) {
 492                 PLAYER_TO_SA(player)->nodemeta_inventory_OnMove(
 493                         *this, count, player);
 494         } else {
 495                 // Destination is nodemeta
 496                 if (to_inv.type == InventoryLocation::NODEMETA) {
 497                         PLAYER_TO_SA(player)->nodemeta_inventory_OnPut(
 498                                 *this, src_item, player);
 499                 }
 500                 // Source is nodemeta
 501                 if (from_inv.type == InventoryLocation::NODEMETA) {
 502                         PLAYER_TO_SA(player)->nodemeta_inventory_OnTake(
 503                                 *this, src_item, player);
 504                 }
 505         }
 506
 507         // Player inventories
 508
 509         // Both endpoints are same player inventory
 510         if (from_inv.type == InventoryLocation::PLAYER &&
 511                         from_inv == to_inv) {
 512                 PLAYER_TO_SA(player)->player_inventory_OnMove(
 513                         *this, count, player);
 514         } else {
 515                 // Destination is player inventory
 516                 if (to_inv.type == InventoryLocation::PLAYER) {
 517                         PLAYER_TO_SA(player)->player_inventory_OnPut(
 518                                 *this, src_item, player);
 519                 }
 520                 // Source is player inventory
 521                 if (from_inv.type == InventoryLocation::PLAYER) {
 522                         PLAYER_TO_SA(player)->player_inventory_OnTake(
 523                                 *this, src_item, player);
 524                 }
 525         }
 526
 527         mgr->setInventoryModified(from_inv, false);
 528         if (inv_from != inv_to)
 529                 mgr->setInventoryModified(to_inv, false);
 530 }
 531
 532 void IMoveAction::clientApply(InventoryManager *mgr, IGameDef *gamedef)
 533 {
 534         // Optional InventoryAction operation that is run on the client
 535         // to make lag less apparent.
 536
 537         Inventory *inv_from = mgr->getInventory(from_inv);
 538         Inventory *inv_to = mgr->getInventory(to_inv);
 539         if (!inv_from || !inv_to)
 540                 return;
 541
 542         InventoryLocation current_player;
 543         current_player.setCurrentPlayer();
 544         Inventory *inv_player = mgr->getInventory(current_player);
 545         if (inv_from != inv_player || inv_to != inv_player)
 546                 return;
 547
 548         InventoryList *list_from = inv_from->getList(from_list);
 549         InventoryList *list_to = inv_to->getList(to_list);
 550         if (!list_from || !list_to)
 551                 return;
 552
 553         if (!move_somewhere)
 554                 list_from->moveItem(from_i, list_to, to_i, count);
 555         else
 556                 list_from->moveItemSomewhere(from_i, list_to, count);
 557
 558         mgr->setInventoryModified(from_inv);
 559         if (inv_from != inv_to)
 560                 mgr->setInventoryModified(to_inv);
 561 }
 562
 563 /*
 564         IDropAction
 565 */
 566
 567 IDropAction::IDropAction(std::istream &is)
 568 {
 569         std::string ts;
 570
 571         std::getline(is, ts, ' ');
 572         count = stoi(ts);
 573
 574         std::getline(is, ts, ' ');
 575         from_inv.deSerialize(ts);
 576
 577         std::getline(is, from_list, ' ');
 578
 579         std::getline(is, ts, ' ');
 580         from_i = stoi(ts);
 581 }
 582
 583 void IDropAction::apply(InventoryManager *mgr, ServerActiveObject *player, IGameDef *gamedef)
 584 {
 585         Inventory *inv_from = mgr->getInventory(from_inv);
 586
 587         if (!inv_from) {
 588                 infostream<<"IDropAction::apply(): FAIL: source inventory not found: "
 589                                 <<"from_inv=\""<<from_inv.dump()<<"\""<<std::endl;
 590                 return;
 591         }
 592
 593         InventoryList *list_from = inv_from->getList(from_list);
 594
 595         /*
 596                 If a list doesn't exist or the source item doesn't exist
 597         */
 598         if (!list_from) {
 599                 infostream<<"IDropAction::apply(): FAIL: source list not found: "
 600                                 <<"from_inv=\""<<from_inv.dump()<<"\""<<std::endl;
 601                 return;
 602         }
 603         if (list_from->getItem(from_i).empty()) {
 604                 infostream<<"IDropAction::apply(): FAIL: source item not found: "
 605                                 <<"from_inv=\""<<from_inv.dump()<<"\""
 606                                 <<", from_list=\""<<from_list<<"\""
 607                                 <<" from_i="<<from_i<<std::endl;
 608                 return;
 609         }
 610
 611         /*
 612                 Do not handle rollback if inventory is player's
 613         */
 614         bool ignore_src_rollback = (from_inv.type == InventoryLocation::PLAYER);
 615
 616         /*
 617                 Collect information of endpoints
 618         */
 619
 620         int take_count = list_from->getItem(from_i).count;
 621         if (count != 0 && count < take_count)
 622                 take_count = count;
 623         int src_can_take_count = take_count;
 624
 625         ItemStack src_item = list_from->getItem(from_i);
 626         src_item.count = take_count;
 627
 628         // Run callbacks depending on source inventory
 629         switch (from_inv.type) {
 630         case InventoryLocation::DETACHED:
 631                 src_can_take_count = PLAYER_TO_SA(player)->detached_inventory_AllowTake(
 632                         *this, src_item, player);
 633                 break;
 634         case InventoryLocation::NODEMETA:
 635                 src_can_take_count = PLAYER_TO_SA(player)->nodemeta_inventory_AllowTake(
 636                         *this, src_item, player);
 637                 break;
 638         case InventoryLocation::PLAYER:
 639                 src_can_take_count = PLAYER_TO_SA(player)->player_inventory_AllowTake(
 640                         *this, src_item, player);
 641                 break;
 642         default:
 643                 break;
 644         }
 645
 646         if (src_can_take_count != -1 && src_can_take_count < take_count)
 647                 take_count = src_can_take_count;
 648
 649         int actually_dropped_count = 0;
 650
 651         // Update item due executed callbacks
 652         src_item = list_from->getItem(from_i);
 653
 654         // Drop the item
 655         ItemStack item1 = list_from->getItem(from_i);
 656         item1.count = take_count;
 657         if(PLAYER_TO_SA(player)->item_OnDrop(item1, player,
 658                                 player->getBasePosition())) {
 659                 actually_dropped_count = take_count - item1.count;
 660
 661                 if (actually_dropped_count == 0) {
 662                         infostream<<"Actually dropped no items"<<std::endl;
 663                         return;
 664                 }
 665
 666                 // If source isn't infinite
 667                 if (src_can_take_count != -1) {
 668                         // Take item from source list
 669                         ItemStack item2 = list_from->takeItem(from_i, actually_dropped_count);
 670
 671                         if (item2.count != actually_dropped_count)
 672                                 errorstream<<"Could not take dropped count of items"<<std::endl;
 673
 674                         mgr->setInventoryModified(from_inv, false);
 675                 }
 676         }
 677
 678         infostream<<"IDropAction::apply(): dropped "
 679                         <<" from inv=\""<<from_inv.dump()<<"\""
 680                         <<" list=\""<<from_list<<"\""
 681                         <<" i="<<from_i
 682                         <<std::endl;
 683
 684         src_item.count = actually_dropped_count;
 685
 686         /*
 687                 Report drop to endpoints
 688         */
 689
 690         switch (from_inv.type) {
 691         case InventoryLocation::DETACHED:
 692                 PLAYER_TO_SA(player)->detached_inventory_OnTake(
 693                         *this, src_item, player);
 694                 break;
 695         case InventoryLocation::NODEMETA:
 696                 PLAYER_TO_SA(player)->nodemeta_inventory_OnTake(
 697                         *this, src_item, player);
 698                 break;
 699         case InventoryLocation::PLAYER:
 700                 PLAYER_TO_SA(player)->player_inventory_OnTake(
 701                         *this, src_item, player);
 702                 break;
 703         default:
 704                 break;
 705         }
 706
 707         /*
 708                 Record rollback information
 709         */
 710         if (!ignore_src_rollback && gamedef->rollback()) {
 711                 IRollbackManager *rollback = gamedef->rollback();
 712
 713                 // If source is not infinite, record item take
 714                 if (src_can_take_count != -1) {
 715                         RollbackAction action;
 716                         std::string loc;
 717                         {
 718                                 std::ostringstream os(std::ios::binary);
 719                                 from_inv.serialize(os);
 720                                 loc = os.str();
 721                         }
 722                         action.setModifyInventoryStack(loc, from_list, from_i,
 723                                         false, src_item);
 724                         rollback->reportAction(action);
 725                 }
 726         }
 727 }
 728
 729 void IDropAction::clientApply(InventoryManager *mgr, IGameDef *gamedef)
 730 {
 731         // Optional InventoryAction operation that is run on the client
 732         // to make lag less apparent.
 733
 734         Inventory *inv_from = mgr->getInventory(from_inv);
 735         if (!inv_from)
 736                 return;
 737
 738         InventoryLocation current_player;
 739         current_player.setCurrentPlayer();
 740         Inventory *inv_player = mgr->getInventory(current_player);
 741         if (inv_from != inv_player)
 742                 return;
 743
 744         InventoryList *list_from = inv_from->getList(from_list);
 745         if (!list_from)
 746                 return;
 747
 748         if (count == 0)
 749                 list_from->changeItem(from_i, ItemStack());
 750         else
 751                 list_from->takeItem(from_i, count);
 752
 753         mgr->setInventoryModified(from_inv);
 754 }
 755
 756 /*
 757         ICraftAction
 758 */
 759
 760 ICraftAction::ICraftAction(std::istream &is)
 761 {
 762         std::string ts;
 763
 764         std::getline(is, ts, ' ');
 765         count = stoi(ts);
 766
 767         std::getline(is, ts, ' ');
 768         craft_inv.deSerialize(ts);
 769 }
 770
 771 void ICraftAction::apply(InventoryManager *mgr,
 772         ServerActiveObject *player, IGameDef *gamedef)
 773 {
 774         Inventory *inv_craft = mgr->getInventory(craft_inv);
 775
 776         if (!inv_craft) {
 777                 infostream << "ICraftAction::apply(): FAIL: inventory not found: "
 778                                 << "craft_inv=\"" << craft_inv.dump() << "\"" << std::endl;
 779                 return;
 780         }
 781
 782         InventoryList *list_craft = inv_craft->getList("craft");
 783         InventoryList *list_craftresult = inv_craft->getList("craftresult");
 784         InventoryList *list_main = inv_craft->getList("main");
 785
 786         /*
 787                 If a list doesn't exist or the source item doesn't exist
 788         */
 789         if (!list_craft) {
 790                 infostream << "ICraftAction::apply(): FAIL: craft list not found: "
 791                                 << "craft_inv=\"" << craft_inv.dump() << "\"" << std::endl;
 792                 return;
 793         }
 794         if (!list_craftresult) {
 795                 infostream << "ICraftAction::apply(): FAIL: craftresult list not found: "
 796                                 << "craft_inv=\"" << craft_inv.dump() << "\"" << std::endl;
 797                 return;
 798         }
 799         if (list_craftresult->getSize() < 1) {
 800                 infostream << "ICraftAction::apply(): FAIL: craftresult list too short: "
 801                                 << "craft_inv=\"" << craft_inv.dump() << "\"" << std::endl;
 802                 return;
 803         }
 804
 805         ItemStack crafted;
 806         ItemStack craftresultitem;
 807         int count_remaining = count;
 808         std::vector<ItemStack> output_replacements;
 809         getCraftingResult(inv_craft, crafted, output_replacements, false, gamedef);
 810         PLAYER_TO_SA(player)->item_CraftPredict(crafted, player, list_craft, craft_inv);
 811         bool found = !crafted.empty();
 812
 813         while (found && list_craftresult->itemFits(0, crafted)) {
 814                 InventoryList saved_craft_list = *list_craft;
 815
 816                 std::vector<ItemStack> temp;
 817                 // Decrement input and add crafting output
 818                 getCraftingResult(inv_craft, crafted, temp, true, gamedef);
 819                 PLAYER_TO_SA(player)->item_OnCraft(crafted, player, &saved_craft_list, craft_inv);
 820                 list_craftresult->addItem(0, crafted);
 821                 mgr->setInventoryModified(craft_inv);
 822
 823                 // Add the new replacements to the list
 824                 IItemDefManager *itemdef = gamedef->getItemDefManager();
 825                 for (auto &itemstack : temp) {
 826                         for (auto &output_replacement : output_replacements) {
 827                                 if (itemstack.name == output_replacement.name) {
 828                                         itemstack = output_replacement.addItem(itemstack, itemdef);
 829                                         if (itemstack.empty())
 830                                                 continue;
 831                                 }
 832                         }
 833                         output_replacements.push_back(itemstack);
 834                 }
 835
 836                 actionstream << player->getDescription()
 837                                 << " crafts "
 838                                 << crafted.getItemString()
 839                                 << std::endl;
 840
 841                 // Decrement counter
 842                 if (count_remaining == 1)
 843                         break;
 844
 845                 if (count_remaining > 1)
 846                         count_remaining--;
 847
 848                 // Get next crafting result
 849                 getCraftingResult(inv_craft, crafted, temp, false, gamedef);
 850                 PLAYER_TO_SA(player)->item_CraftPredict(crafted, player, list_craft, craft_inv);
 851                 found = !crafted.empty();
 852         }
 853
 854         // Put the replacements in the inventory or drop them on the floor, if
 855         // the invenotry is full
 856         for (auto &output_replacement : output_replacements) {
 857                 if (list_main)
 858                         output_replacement = list_main->addItem(output_replacement);
 859                 if (output_replacement.empty())
 860                         continue;
 861                 u16 count = output_replacement.count;
 862                 do {
 863                         PLAYER_TO_SA(player)->item_OnDrop(output_replacement, player,
 864                                 player->getBasePosition());
 865                         if (count >= output_replacement.count) {
 866                                 errorstream << "Couldn't drop replacement stack " <<
 867                                         output_replacement.getItemString() << " because drop loop didn't "
 868                                         "decrease count." << std::endl;
 869
 870                                 break;
 871                         }
 872                 } while (!output_replacement.empty());
 873         }
 874
 875         infostream<<"ICraftAction::apply(): crafted "
 876                         <<" craft_inv=\""<<craft_inv.dump()<<"\""
 877                         <<std::endl;
 878 }
 879
 880 void ICraftAction::clientApply(InventoryManager *mgr, IGameDef *gamedef)
 881 {
 882         // Optional InventoryAction operation that is run on the client
 883         // to make lag less apparent.
 884 }
 885
 886
 887 // Crafting helper
 888 bool getCraftingResult(Inventory *inv, ItemStack &result,
 889                 std::vector<ItemStack> &output_replacements,
 890                 bool decrementInput, IGameDef *gamedef)
 891 {
 892         result.clear();
 893
 894         // Get the InventoryList in which we will operate
 895         InventoryList *clist = inv->getList("craft");
 896         if (!clist)
 897                 return false;
 898
 899         // Mangle crafting grid to an another format
 900         CraftInput ci;
 901         ci.method = CRAFT_METHOD_NORMAL;
 902         ci.width = clist->getWidth() ? clist->getWidth() : 3;
 903         for (u16 i=0; i < clist->getSize(); i++)
 904                 ci.items.push_back(clist->getItem(i));
 905
 906         // Find out what is crafted and add it to result item slot
 907         CraftOutput co;
 908         bool found = gamedef->getCraftDefManager()->getCraftResult(
 909                         ci, co, output_replacements, decrementInput, gamedef);
 910         if (found)
 911                 result.deSerialize(co.item, gamedef->getItemDefManager());
 912
 913         if (found && decrementInput) {
 914                 // CraftInput has been changed, apply changes in clist
 915                 for (u16 i=0; i < clist->getSize(); i++) {
 916                         clist->changeItem(i, ci.items[i]);
 917                 }
 918         }
 919
 920         return found;
 921 }
 922