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 "server/serveractiveobject.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                 // Undo client prediction. See 'clientApply'
 352                 if (from_inv.type == InventoryLocation::PLAYER)
 353                         list_from->setModified();
 354
 355                 if (to_inv.type == InventoryLocation::PLAYER)
 356                         list_to->setModified();
 357
 358                 infostream<<"IMoveAction::apply(): move was completely disallowed:"
 359                                 <<" count="<<old_count
 360                                 <<" from inv=\""<<from_inv.dump()<<"\""
 361                                 <<" list=\""<<from_list<<"\""
 362                                 <<" i="<<from_i
 363                                 <<" to inv=\""<<to_inv.dump()<<"\""
 364                                 <<" list=\""<<to_list<<"\""
 365                                 <<" i="<<to_i
 366                                 <<std::endl;
 367                 return;
 368         }
 369
 370         ItemStack src_item = list_from->getItem(from_i);
 371         src_item.count = count;
 372         ItemStack from_stack_was = list_from->getItem(from_i);
 373         ItemStack to_stack_was = list_to->getItem(to_i);
 374
 375         /*
 376                 Perform actual move
 377
 378                 If something is wrong (source item is empty, destination is the
 379                 same as source), nothing happens
 380         */
 381         bool did_swap = false;
 382         move_count = list_from->moveItem(from_i,
 383                 list_to, to_i, count, !caused_by_move_somewhere, &did_swap);
 384
 385         // If source is infinite, reset it's stack
 386         if (src_can_take_count == -1) {
 387                 // For the caused_by_move_somewhere == true case we didn't force-put the item,
 388                 // which guarantees there is no leftover, and code below would duplicate the
 389                 // (not replaced) to_stack_was item.
 390                 if (!caused_by_move_somewhere) {
 391                         // If destination stack is of different type and there are leftover
 392                         // items, attempt to put the leftover items to a different place in the
 393                         // destination inventory.
 394                         // The client-side GUI will try to guess if this happens.
 395                         if (from_stack_was.name != to_stack_was.name) {
 396                                 for (u32 i = 0; i < list_to->getSize(); i++) {
 397                                         if (list_to->getItem(i).empty()) {
 398                                                 list_to->changeItem(i, to_stack_was);
 399                                                 break;
 400                                         }
 401                                 }
 402                         }
 403                 }
 404                 if (move_count > 0 || did_swap) {
 405                         list_from->deleteItem(from_i);
 406                         list_from->addItem(from_i, from_stack_was);
 407                 }
 408         }
 409         // If destination is infinite, reset it's stack and take count from source
 410         if (dst_can_put_count == -1) {
 411                 list_to->deleteItem(to_i);
 412                 list_to->addItem(to_i, to_stack_was);
 413                 list_from->deleteItem(from_i);
 414                 list_from->addItem(from_i, from_stack_was);
 415                 list_from->takeItem(from_i, count);
 416         }
 417
 418         infostream << "IMoveAction::apply(): moved"
 419                         << " msom=" << move_somewhere
 420                         << " caused=" << caused_by_move_somewhere
 421                         << " count=" << count
 422                         << " from inv=\"" << from_inv.dump() << "\""
 423                         << " list=\"" << from_list << "\""
 424                         << " i=" << from_i
 425                         << " to inv=\"" << to_inv.dump() << "\""
 426                         << " list=\"" << to_list << "\""
 427                         << " i=" << to_i
 428                         << std::endl;
 429
 430         // If we are inside the move somewhere loop, we don't need to report
 431         // anything if nothing happened (perhaps we don't need to report
 432         // anything for caused_by_move_somewhere == true, but this way its safer)
 433         if (caused_by_move_somewhere && move_count == 0)
 434                 return;
 435
 436         /*
 437                 Record rollback information
 438         */
 439         if (!ignore_rollback && gamedef->rollback()) {
 440                 IRollbackManager *rollback = gamedef->rollback();
 441
 442                 // If source is not infinite, record item take
 443                 if (src_can_take_count != -1) {
 444                         RollbackAction action;
 445                         std::string loc;
 446                         {
 447                                 std::ostringstream os(std::ios::binary);
 448                                 from_inv.serialize(os);
 449                                 loc = os.str();
 450                         }
 451                         action.setModifyInventoryStack(loc, from_list, from_i, false,
 452                                         src_item);
 453                         rollback->reportAction(action);
 454                 }
 455                 // If destination is not infinite, record item put
 456                 if (dst_can_put_count != -1) {
 457                         RollbackAction action;
 458                         std::string loc;
 459                         {
 460                                 std::ostringstream os(std::ios::binary);
 461                                 to_inv.serialize(os);
 462                                 loc = os.str();
 463                         }
 464                         action.setModifyInventoryStack(loc, to_list, to_i, true,
 465                                         src_item);
 466                         rollback->reportAction(action);
 467                 }
 468         }
 469
 470         /*
 471                 Report move to endpoints
 472         */
 473
 474         /* Detached inventories */
 475
 476         // Both endpoints are same detached
 477         if (from_inv.type == InventoryLocation::DETACHED &&
 478                         from_inv == to_inv) {
 479                 PLAYER_TO_SA(player)->detached_inventory_OnMove(
 480                                 *this, count, player);
 481         } else {
 482                 // Destination is detached
 483                 if (to_inv.type == InventoryLocation::DETACHED) {
 484                         PLAYER_TO_SA(player)->detached_inventory_OnPut(
 485                                 *this, src_item, player);
 486                 }
 487                 // Source is detached
 488                 if (from_inv.type == InventoryLocation::DETACHED) {
 489                         PLAYER_TO_SA(player)->detached_inventory_OnTake(
 490                                 *this, src_item, player);
 491                 }
 492         }
 493
 494         /* Node metadata inventories */
 495
 496         // Both endpoints are same nodemeta
 497         if (from_inv.type == InventoryLocation::NODEMETA &&
 498                         from_inv == to_inv) {
 499                 PLAYER_TO_SA(player)->nodemeta_inventory_OnMove(
 500                         *this, count, player);
 501         } else {
 502                 // Destination is nodemeta
 503                 if (to_inv.type == InventoryLocation::NODEMETA) {
 504                         PLAYER_TO_SA(player)->nodemeta_inventory_OnPut(
 505                                 *this, src_item, player);
 506                 }
 507                 // Source is nodemeta
 508                 if (from_inv.type == InventoryLocation::NODEMETA) {
 509                         PLAYER_TO_SA(player)->nodemeta_inventory_OnTake(
 510                                 *this, src_item, player);
 511                 }
 512         }
 513
 514         // Player inventories
 515
 516         // Both endpoints are same player inventory
 517         if (from_inv.type == InventoryLocation::PLAYER &&
 518                         from_inv == to_inv) {
 519                 PLAYER_TO_SA(player)->player_inventory_OnMove(
 520                         *this, count, player);
 521         } else {
 522                 // Destination is player inventory
 523                 if (to_inv.type == InventoryLocation::PLAYER) {
 524                         PLAYER_TO_SA(player)->player_inventory_OnPut(
 525                                 *this, src_item, player);
 526                 }
 527                 // Source is player inventory
 528                 if (from_inv.type == InventoryLocation::PLAYER) {
 529                         PLAYER_TO_SA(player)->player_inventory_OnTake(
 530                                 *this, src_item, player);
 531                 }
 532         }
 533
 534         mgr->setInventoryModified(from_inv);
 535         if (inv_from != inv_to)
 536                 mgr->setInventoryModified(to_inv);
 537 }
 538
 539 void IMoveAction::clientApply(InventoryManager *mgr, IGameDef *gamedef)
 540 {
 541         // Optional InventoryAction operation that is run on the client
 542         // to make lag less apparent.
 543
 544         Inventory *inv_from = mgr->getInventory(from_inv);
 545         Inventory *inv_to = mgr->getInventory(to_inv);
 546         if (!inv_from || !inv_to)
 547                 return;
 548
 549         InventoryLocation current_player;
 550         current_player.setCurrentPlayer();
 551         Inventory *inv_player = mgr->getInventory(current_player);
 552         if (inv_from != inv_player || inv_to != inv_player)
 553                 return;
 554
 555         InventoryList *list_from = inv_from->getList(from_list);
 556         InventoryList *list_to = inv_to->getList(to_list);
 557         if (!list_from || !list_to)
 558                 return;
 559
 560         if (!move_somewhere)
 561                 list_from->moveItem(from_i, list_to, to_i, count);
 562         else
 563                 list_from->moveItemSomewhere(from_i, list_to, count);
 564
 565         mgr->setInventoryModified(from_inv);
 566         if (inv_from != inv_to)
 567                 mgr->setInventoryModified(to_inv);
 568 }
 569
 570 /*
 571         IDropAction
 572 */
 573
 574 IDropAction::IDropAction(std::istream &is)
 575 {
 576         std::string ts;
 577
 578         std::getline(is, ts, ' ');
 579         count = stoi(ts);
 580
 581         std::getline(is, ts, ' ');
 582         from_inv.deSerialize(ts);
 583
 584         std::getline(is, from_list, ' ');
 585
 586         std::getline(is, ts, ' ');
 587         from_i = stoi(ts);
 588 }
 589
 590 void IDropAction::apply(InventoryManager *mgr, ServerActiveObject *player, IGameDef *gamedef)
 591 {
 592         Inventory *inv_from = mgr->getInventory(from_inv);
 593
 594         if (!inv_from) {
 595                 infostream<<"IDropAction::apply(): FAIL: source inventory not found: "
 596                                 <<"from_inv=\""<<from_inv.dump()<<"\""<<std::endl;
 597                 return;
 598         }
 599
 600         InventoryList *list_from = inv_from->getList(from_list);
 601
 602         /*
 603                 If a list doesn't exist or the source item doesn't exist
 604         */
 605         if (!list_from) {
 606                 infostream<<"IDropAction::apply(): FAIL: source list not found: "
 607                                 <<"from_inv=\""<<from_inv.dump()<<"\""<<std::endl;
 608                 return;
 609         }
 610         if (list_from->getItem(from_i).empty()) {
 611                 infostream<<"IDropAction::apply(): FAIL: source item not found: "
 612                                 <<"from_inv=\""<<from_inv.dump()<<"\""
 613                                 <<", from_list=\""<<from_list<<"\""
 614                                 <<" from_i="<<from_i<<std::endl;
 615                 return;
 616         }
 617
 618         /*
 619                 Do not handle rollback if inventory is player's
 620         */
 621         bool ignore_src_rollback = (from_inv.type == InventoryLocation::PLAYER);
 622
 623         /*
 624                 Collect information of endpoints
 625         */
 626
 627         int take_count = list_from->getItem(from_i).count;
 628         if (count != 0 && count < take_count)
 629                 take_count = count;
 630         int src_can_take_count = take_count;
 631
 632         ItemStack src_item = list_from->getItem(from_i);
 633         src_item.count = take_count;
 634
 635         // Run callbacks depending on source inventory
 636         switch (from_inv.type) {
 637         case InventoryLocation::DETACHED:
 638                 src_can_take_count = PLAYER_TO_SA(player)->detached_inventory_AllowTake(
 639                         *this, src_item, player);
 640                 break;
 641         case InventoryLocation::NODEMETA:
 642                 src_can_take_count = PLAYER_TO_SA(player)->nodemeta_inventory_AllowTake(
 643                         *this, src_item, player);
 644                 break;
 645         case InventoryLocation::PLAYER:
 646                 src_can_take_count = PLAYER_TO_SA(player)->player_inventory_AllowTake(
 647                         *this, src_item, player);
 648                 break;
 649         default:
 650                 break;
 651         }
 652
 653         if (src_can_take_count != -1 && src_can_take_count < take_count)
 654                 take_count = src_can_take_count;
 655
 656         // Update item due executed callbacks
 657         src_item = list_from->getItem(from_i);
 658
 659         // Drop the item
 660         ItemStack item1 = list_from->getItem(from_i);
 661         item1.count = take_count;
 662         if(PLAYER_TO_SA(player)->item_OnDrop(item1, player,
 663                                 player->getBasePosition())) {
 664                 int actually_dropped_count = take_count - item1.count;
 665
 666                 if (actually_dropped_count == 0) {
 667                         infostream<<"Actually dropped no items"<<std::endl;
 668
 669                         // Revert client prediction. See 'clientApply'
 670                         if (from_inv.type == InventoryLocation::PLAYER)
 671                                 list_from->setModified();
 672                         return;
 673                 }
 674
 675                 // If source isn't infinite
 676                 if (src_can_take_count != -1) {
 677                         // Take item from source list
 678                         ItemStack item2 = list_from->takeItem(from_i, actually_dropped_count);
 679
 680                         if (item2.count != actually_dropped_count)
 681                                 errorstream<<"Could not take dropped count of items"<<std::endl;
 682                 }
 683
 684                 src_item.count = actually_dropped_count;
 685                 mgr->setInventoryModified(from_inv);
 686         }
 687
 688         infostream<<"IDropAction::apply(): dropped "
 689                         <<" from inv=\""<<from_inv.dump()<<"\""
 690                         <<" list=\""<<from_list<<"\""
 691                         <<" i="<<from_i
 692                         <<std::endl;
 693
 694
 695         /*
 696                 Report drop to endpoints
 697         */
 698
 699         switch (from_inv.type) {
 700         case InventoryLocation::DETACHED:
 701                 PLAYER_TO_SA(player)->detached_inventory_OnTake(
 702                         *this, src_item, player);
 703                 break;
 704         case InventoryLocation::NODEMETA:
 705                 PLAYER_TO_SA(player)->nodemeta_inventory_OnTake(
 706                         *this, src_item, player);
 707                 break;
 708         case InventoryLocation::PLAYER:
 709                 PLAYER_TO_SA(player)->player_inventory_OnTake(
 710                         *this, src_item, player);
 711                 break;
 712         default:
 713                 break;
 714         }
 715
 716         /*
 717                 Record rollback information
 718         */
 719         if (!ignore_src_rollback && gamedef->rollback()) {
 720                 IRollbackManager *rollback = gamedef->rollback();
 721
 722                 // If source is not infinite, record item take
 723                 if (src_can_take_count != -1) {
 724                         RollbackAction action;
 725                         std::string loc;
 726                         {
 727                                 std::ostringstream os(std::ios::binary);
 728                                 from_inv.serialize(os);
 729                                 loc = os.str();
 730                         }
 731                         action.setModifyInventoryStack(loc, from_list, from_i,
 732                                         false, src_item);
 733                         rollback->reportAction(action);
 734                 }
 735         }
 736 }
 737
 738 void IDropAction::clientApply(InventoryManager *mgr, IGameDef *gamedef)
 739 {
 740         // Optional InventoryAction operation that is run on the client
 741         // to make lag less apparent.
 742
 743         Inventory *inv_from = mgr->getInventory(from_inv);
 744         if (!inv_from)
 745                 return;
 746
 747         InventoryLocation current_player;
 748         current_player.setCurrentPlayer();
 749         Inventory *inv_player = mgr->getInventory(current_player);
 750         if (inv_from != inv_player)
 751                 return;
 752
 753         InventoryList *list_from = inv_from->getList(from_list);
 754         if (!list_from)
 755                 return;
 756
 757         if (count == 0)
 758                 list_from->changeItem(from_i, ItemStack());
 759         else
 760                 list_from->takeItem(from_i, count);
 761
 762         mgr->setInventoryModified(from_inv);
 763 }
 764
 765 /*
 766         ICraftAction
 767 */
 768
 769 ICraftAction::ICraftAction(std::istream &is)
 770 {
 771         std::string ts;
 772
 773         std::getline(is, ts, ' ');
 774         count = stoi(ts);
 775
 776         std::getline(is, ts, ' ');
 777         craft_inv.deSerialize(ts);
 778 }
 779
 780 void ICraftAction::apply(InventoryManager *mgr,
 781         ServerActiveObject *player, IGameDef *gamedef)
 782 {
 783         Inventory *inv_craft = mgr->getInventory(craft_inv);
 784
 785         if (!inv_craft) {
 786                 infostream << "ICraftAction::apply(): FAIL: inventory not found: "
 787                                 << "craft_inv=\"" << craft_inv.dump() << "\"" << std::endl;
 788                 return;
 789         }
 790
 791         InventoryList *list_craft = inv_craft->getList("craft");
 792         InventoryList *list_craftresult = inv_craft->getList("craftresult");
 793         InventoryList *list_main = inv_craft->getList("main");
 794
 795         /*
 796                 If a list doesn't exist or the source item doesn't exist
 797         */
 798         if (!list_craft) {
 799                 infostream << "ICraftAction::apply(): FAIL: craft list not found: "
 800                                 << "craft_inv=\"" << craft_inv.dump() << "\"" << std::endl;
 801                 return;
 802         }
 803         if (!list_craftresult) {
 804                 infostream << "ICraftAction::apply(): FAIL: craftresult list not found: "
 805                                 << "craft_inv=\"" << craft_inv.dump() << "\"" << std::endl;
 806                 return;
 807         }
 808         if (list_craftresult->getSize() < 1) {
 809                 infostream << "ICraftAction::apply(): FAIL: craftresult list too short: "
 810                                 << "craft_inv=\"" << craft_inv.dump() << "\"" << std::endl;
 811                 return;
 812         }
 813
 814         ItemStack crafted;
 815         ItemStack craftresultitem;
 816         int count_remaining = count;
 817         std::vector<ItemStack> output_replacements;
 818         getCraftingResult(inv_craft, crafted, output_replacements, false, gamedef);
 819         PLAYER_TO_SA(player)->item_CraftPredict(crafted, player, list_craft, craft_inv);
 820         bool found = !crafted.empty();
 821
 822         while (found && list_craftresult->itemFits(0, crafted)) {
 823                 InventoryList saved_craft_list = *list_craft;
 824
 825                 std::vector<ItemStack> temp;
 826                 // Decrement input and add crafting output
 827                 getCraftingResult(inv_craft, crafted, temp, true, gamedef);
 828                 PLAYER_TO_SA(player)->item_OnCraft(crafted, player, &saved_craft_list, craft_inv);
 829                 list_craftresult->addItem(0, crafted);
 830                 mgr->setInventoryModified(craft_inv);
 831
 832                 // Add the new replacements to the list
 833                 IItemDefManager *itemdef = gamedef->getItemDefManager();
 834                 for (auto &itemstack : temp) {
 835                         for (auto &output_replacement : output_replacements) {
 836                                 if (itemstack.name == output_replacement.name) {
 837                                         itemstack = output_replacement.addItem(itemstack, itemdef);
 838                                         if (itemstack.empty())
 839                                                 continue;
 840                                 }
 841                         }
 842                         output_replacements.push_back(itemstack);
 843                 }
 844
 845                 actionstream << player->getDescription()
 846                                 << " crafts "
 847                                 << crafted.getItemString()
 848                                 << std::endl;
 849
 850                 // Decrement counter
 851                 if (count_remaining == 1)
 852                         break;
 853
 854                 if (count_remaining > 1)
 855                         count_remaining--;
 856
 857                 // Get next crafting result
 858                 getCraftingResult(inv_craft, crafted, temp, false, gamedef);
 859                 PLAYER_TO_SA(player)->item_CraftPredict(crafted, player, list_craft, craft_inv);
 860                 found = !crafted.empty();
 861         }
 862
 863         // Put the replacements in the inventory or drop them on the floor, if
 864         // the inventory is full
 865         for (auto &output_replacement : output_replacements) {
 866                 if (list_main)
 867                         output_replacement = list_main->addItem(output_replacement);
 868                 if (output_replacement.empty())
 869                         continue;
 870                 u16 count = output_replacement.count;
 871                 do {
 872                         PLAYER_TO_SA(player)->item_OnDrop(output_replacement, player,
 873                                 player->getBasePosition());
 874                         if (count >= output_replacement.count) {
 875                                 errorstream << "Couldn't drop replacement stack " <<
 876                                         output_replacement.getItemString() << " because drop loop didn't "
 877                                         "decrease count." << std::endl;
 878
 879                                 break;
 880                         }
 881                 } while (!output_replacement.empty());
 882         }
 883
 884         infostream<<"ICraftAction::apply(): crafted "
 885                         <<" craft_inv=\""<<craft_inv.dump()<<"\""
 886                         <<std::endl;
 887 }
 888
 889 void ICraftAction::clientApply(InventoryManager *mgr, IGameDef *gamedef)
 890 {
 891         // Optional InventoryAction operation that is run on the client
 892         // to make lag less apparent.
 893 }
 894
 895
 896 // Crafting helper
 897 bool getCraftingResult(Inventory *inv, ItemStack &result,
 898                 std::vector<ItemStack> &output_replacements,
 899                 bool decrementInput, IGameDef *gamedef)
 900 {
 901         result.clear();
 902
 903         // Get the InventoryList in which we will operate
 904         InventoryList *clist = inv->getList("craft");
 905         if (!clist)
 906                 return false;
 907
 908         // Mangle crafting grid to an another format
 909         CraftInput ci;
 910         ci.method = CRAFT_METHOD_NORMAL;
 911         ci.width = clist->getWidth() ? clist->getWidth() : 3;
 912         for (u16 i=0; i < clist->getSize(); i++)
 913                 ci.items.push_back(clist->getItem(i));
 914
 915         // Find out what is crafted and add it to result item slot
 916         CraftOutput co;
 917         bool found = gamedef->getCraftDefManager()->getCraftResult(
 918                         ci, co, output_replacements, decrementInput, gamedef);
 919         if (found)
 920                 result.deSerialize(co.item, gamedef->getItemDefManager());
 921
 922         if (found && decrementInput) {
 923                 // CraftInput has been changed, apply changes in clist
 924                 for (u16 i=0; i < clist->getSize(); i++) {
 925                         clist->changeItem(i, ci.items[i]);
 926                 }
 927         }
 928
 929         return found;
 930 }
 931