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::swapDirections()
 158 {
 159         std::swap(from_inv, to_inv);
 160         std::swap(from_list, to_list);
 161         std::swap(from_i, to_i);
 162 }
 163
 164 void IMoveAction::onPutAndOnTake(const ItemStack &src_item, ServerActiveObject *player) const
 165 {
 166         ServerScripting *sa = PLAYER_TO_SA(player);
 167         if (to_inv.type == InventoryLocation::DETACHED)
 168                 sa->detached_inventory_OnPut(*this, src_item, player);
 169         else if (to_inv.type == InventoryLocation::NODEMETA)
 170                 sa->nodemeta_inventory_OnPut(*this, src_item, player);
 171         else if (to_inv.type == InventoryLocation::PLAYER)
 172                 sa->player_inventory_OnPut(*this, src_item, player);
 173         else
 174                 assert(false);
 175
 176         if (from_inv.type == InventoryLocation::DETACHED)
 177                 sa->detached_inventory_OnTake(*this, src_item, player);
 178         else if (from_inv.type == InventoryLocation::NODEMETA)
 179                 sa->nodemeta_inventory_OnTake(*this, src_item, player);
 180         else if (from_inv.type == InventoryLocation::PLAYER)
 181                 sa->player_inventory_OnTake(*this, src_item, player);
 182         else
 183                 assert(false);
 184 }
 185
 186 void IMoveAction::onMove(int count, ServerActiveObject *player) const
 187 {
 188         ServerScripting *sa = PLAYER_TO_SA(player);
 189         if (from_inv.type == InventoryLocation::DETACHED)
 190                 sa->detached_inventory_OnMove(*this, count, player);
 191         else if (from_inv.type == InventoryLocation::NODEMETA)
 192                 sa->nodemeta_inventory_OnMove(*this, count, player);
 193         else if (from_inv.type == InventoryLocation::PLAYER)
 194                 sa->player_inventory_OnMove(*this, count, player);
 195         else
 196                 assert(false);
 197 }
 198
 199 int IMoveAction::allowPut(const ItemStack &dst_item, ServerActiveObject *player) const
 200 {
 201         ServerScripting *sa = PLAYER_TO_SA(player);
 202         int dst_can_put_count = 0xffff;
 203         if (to_inv.type == InventoryLocation::DETACHED)
 204                 dst_can_put_count = sa->detached_inventory_AllowPut(*this, dst_item, player);
 205         else if (to_inv.type == InventoryLocation::NODEMETA)
 206                 dst_can_put_count = sa->nodemeta_inventory_AllowPut(*this, dst_item, player);
 207         else if (to_inv.type == InventoryLocation::PLAYER)
 208                 dst_can_put_count = sa->player_inventory_AllowPut(*this, dst_item, player);
 209         else
 210                 assert(false);
 211         return dst_can_put_count;
 212 }
 213
 214 int IMoveAction::allowTake(const ItemStack &src_item, ServerActiveObject *player) const
 215 {
 216         ServerScripting *sa = PLAYER_TO_SA(player);
 217         int src_can_take_count = 0xffff;
 218         if (from_inv.type == InventoryLocation::DETACHED)
 219                 src_can_take_count = sa->detached_inventory_AllowTake(*this, src_item, player);
 220         else if (from_inv.type == InventoryLocation::NODEMETA)
 221                 src_can_take_count = sa->nodemeta_inventory_AllowTake(*this, src_item, player);
 222         else if (from_inv.type == InventoryLocation::PLAYER)
 223                 src_can_take_count = sa->player_inventory_AllowTake(*this, src_item, player);
 224         else
 225                 assert(false);
 226         return src_can_take_count;
 227 }
 228
 229 int IMoveAction::allowMove(int try_take_count, ServerActiveObject *player) const
 230 {
 231         ServerScripting *sa = PLAYER_TO_SA(player);
 232         int src_can_take_count = 0xffff;
 233         if (from_inv.type == InventoryLocation::DETACHED)
 234                 src_can_take_count = sa->detached_inventory_AllowMove(*this, try_take_count, player);
 235         else if (from_inv.type == InventoryLocation::NODEMETA)
 236                 src_can_take_count = sa->nodemeta_inventory_AllowMove(*this, try_take_count, player);
 237         else if (from_inv.type == InventoryLocation::PLAYER)
 238                 src_can_take_count = sa->player_inventory_AllowMove(*this, try_take_count, player);
 239         else
 240                 assert(false);
 241         return src_can_take_count;
 242 }
 243
 244 void IMoveAction::apply(InventoryManager *mgr, ServerActiveObject *player, IGameDef *gamedef)
 245 {
 246         Inventory *inv_from = mgr->getInventory(from_inv);
 247         Inventory *inv_to = mgr->getInventory(to_inv);
 248
 249         if (!inv_from) {
 250                 infostream << "IMoveAction::apply(): FAIL: source inventory not found: "
 251                         << "from_inv=\""<<from_inv.dump() << "\""
 252                         << ", to_inv=\"" << to_inv.dump() << "\"" << std::endl;
 253                 return;
 254         }
 255         if (!inv_to) {
 256                 infostream << "IMoveAction::apply(): FAIL: destination inventory not found: "
 257                         << "from_inv=\"" << from_inv.dump() << "\""
 258                         << ", to_inv=\"" << to_inv.dump() << "\"" << std::endl;
 259                 return;
 260         }
 261
 262         InventoryList *list_from = inv_from->getList(from_list);
 263         InventoryList *list_to = inv_to->getList(to_list);
 264
 265         /*
 266                 If a list doesn't exist or the source item doesn't exist
 267         */
 268         if (!list_from) {
 269                 infostream << "IMoveAction::apply(): FAIL: source list not found: "
 270                         << "from_inv=\"" << from_inv.dump() << "\""
 271                         << ", from_list=\"" << from_list << "\"" << std::endl;
 272                 return;
 273         }
 274         if (!list_to) {
 275                 infostream << "IMoveAction::apply(): FAIL: destination list not found: "
 276                         << "to_inv=\""<<to_inv.dump() << "\""
 277                         << ", to_list=\"" << to_list << "\"" << std::endl;
 278                 return;
 279         }
 280
 281         if (move_somewhere) {
 282                 s16 old_to_i = to_i;
 283                 u16 old_count = count;
 284                 caused_by_move_somewhere = true;
 285                 move_somewhere = false;
 286
 287                 infostream << "IMoveAction::apply(): moving item somewhere"
 288                         << " msom=" << move_somewhere
 289                         << " count=" << count
 290                         << " from inv=\"" << from_inv.dump() << "\""
 291                         << " list=\"" << from_list << "\""
 292                         << " i=" << from_i
 293                         << " to inv=\"" << to_inv.dump() << "\""
 294                         << " list=\"" << to_list << "\""
 295                         << std::endl;
 296
 297                 // Try to add the item to destination list
 298                 s16 dest_size = list_to->getSize();
 299                 // First try all the non-empty slots
 300                 for (s16 dest_i = 0; dest_i < dest_size && count > 0; dest_i++) {
 301                         if (!list_to->getItem(dest_i).empty()) {
 302                                 to_i = dest_i;
 303                                 apply(mgr, player, gamedef);
 304                                 count -= move_count;
 305                         }
 306                 }
 307
 308                 // Then try all the empty ones
 309                 for (s16 dest_i = 0; dest_i < dest_size && count > 0; dest_i++) {
 310                         if (list_to->getItem(dest_i).empty()) {
 311                                 to_i = dest_i;
 312                                 apply(mgr, player, gamedef);
 313                                 count -= move_count;
 314                         }
 315                 }
 316
 317                 to_i = old_to_i;
 318                 count = old_count;
 319                 caused_by_move_somewhere = false;
 320                 move_somewhere = true;
 321                 return;
 322         }
 323
 324         if ((u16)to_i > list_to->getSize()) {
 325                 infostream << "IMoveAction::apply(): FAIL: destination index out of bounds: "
 326                         << "to_i=" << to_i
 327                         << ", size=" << list_to->getSize() << std::endl;
 328                 return;
 329         }
 330         /*
 331                 Do not handle rollback if both inventories are that of the same player
 332         */
 333         bool ignore_rollback = (
 334                 from_inv.type == InventoryLocation::PLAYER &&
 335                 from_inv == to_inv);
 336
 337         /*
 338                 Collect information of endpoints
 339         */
 340
 341         ItemStack src_item = list_from->getItem(from_i);
 342         if (count > 0)
 343                 src_item.count = count;
 344         if (src_item.empty())
 345                 return;
 346
 347         int src_can_take_count = 0xffff;
 348         int dst_can_put_count = 0xffff;
 349
 350         // this is needed for swapping items inside one inventory to work
 351         ItemStack restitem;
 352         bool allow_swap = !list_to->itemFits(to_i, src_item, &restitem)
 353                 && restitem.count == src_item.count
 354                 && !caused_by_move_somewhere;
 355
 356         // Shift-click: Cannot fill this stack, proceed with next slot
 357         if (caused_by_move_somewhere && restitem.count == src_item.count)
 358                 return;
 359
 360         if (allow_swap) {
 361                 // Swap will affect the entire stack if it can performed.
 362                 src_item = list_from->getItem(from_i);
 363                 count = src_item.count;
 364         }
 365
 366         if (from_inv == to_inv) {
 367                 // Move action within the same inventory
 368                 src_can_take_count = allowMove(src_item.count, player);
 369
 370                 bool swap_expected = allow_swap;
 371                 allow_swap = allow_swap
 372                         && (src_can_take_count == -1 || src_can_take_count >= src_item.count);
 373                 if (allow_swap) {
 374                         int try_put_count = list_to->getItem(to_i).count;
 375                         swapDirections();
 376                         dst_can_put_count = allowMove(try_put_count, player);
 377                         allow_swap = allow_swap
 378                                 && (dst_can_put_count == -1 || dst_can_put_count >= try_put_count);
 379                         swapDirections();
 380                 } else {
 381                         dst_can_put_count = src_can_take_count;
 382                 }
 383                 if (swap_expected != allow_swap)
 384                         src_can_take_count = dst_can_put_count = 0;
 385         } else {
 386                 // Take from one inventory, put into another
 387                 dst_can_put_count = allowPut(src_item, player);
 388                 src_can_take_count = allowTake(src_item, player);
 389
 390                 bool swap_expected = allow_swap;
 391                 allow_swap = allow_swap
 392                         && (src_can_take_count == -1 || src_can_take_count >= src_item.count)
 393                         && (dst_can_put_count == -1 || dst_can_put_count >= src_item.count);
 394                 // A swap is expected, which means that we have to
 395                 // run the "allow" callbacks a second time with swapped inventories
 396                 if (allow_swap) {
 397                         ItemStack dst_item = list_to->getItem(to_i);
 398                         swapDirections();
 399
 400                         int src_can_take = allowPut(dst_item, player);
 401                         int dst_can_put = allowTake(dst_item, player);
 402                         allow_swap = allow_swap
 403                                 && (src_can_take == -1 || src_can_take >= dst_item.count)
 404                                 && (dst_can_put == -1 || dst_can_put >= dst_item.count);
 405                         swapDirections();
 406                 }
 407                 if (swap_expected != allow_swap)
 408                         src_can_take_count = dst_can_put_count = 0;
 409         }
 410
 411         int old_count = count;
 412
 413         /* Modify count according to collected data */
 414         count = src_item.count;
 415         if (src_can_take_count != -1 && count > src_can_take_count)
 416                 count = src_can_take_count;
 417         if (dst_can_put_count != -1 && count > dst_can_put_count)
 418                 count = dst_can_put_count;
 419         /* Limit according to source item count */
 420         if (count > list_from->getItem(from_i).count)
 421                 count = list_from->getItem(from_i).count;
 422
 423         /* If no items will be moved, don't go further */
 424         if (count == 0) {
 425                 // Undo client prediction. See 'clientApply'
 426                 if (from_inv.type == InventoryLocation::PLAYER)
 427                         list_from->setModified();
 428
 429                 if (to_inv.type == InventoryLocation::PLAYER)
 430                         list_to->setModified();
 431
 432                 infostream<<"IMoveAction::apply(): move was completely disallowed:"
 433                                 <<" count="<<old_count
 434                                 <<" from inv=\""<<from_inv.dump()<<"\""
 435                                 <<" list=\""<<from_list<<"\""
 436                                 <<" i="<<from_i
 437                                 <<" to inv=\""<<to_inv.dump()<<"\""
 438                                 <<" list=\""<<to_list<<"\""
 439                                 <<" i="<<to_i
 440                                 <<std::endl;
 441                 return;
 442         }
 443
 444         src_item = list_from->getItem(from_i);
 445         src_item.count = count;
 446         ItemStack from_stack_was = list_from->getItem(from_i);
 447         ItemStack to_stack_was = list_to->getItem(to_i);
 448
 449         /*
 450                 Perform actual move
 451
 452                 If something is wrong (source item is empty, destination is the
 453                 same as source), nothing happens
 454         */
 455         bool did_swap = false;
 456         move_count = list_from->moveItem(from_i,
 457                 list_to, to_i, count, allow_swap, &did_swap);
 458         assert(allow_swap == did_swap);
 459
 460         // If source is infinite, reset it's stack
 461         if (src_can_take_count == -1) {
 462                 // For the caused_by_move_somewhere == true case we didn't force-put the item,
 463                 // which guarantees there is no leftover, and code below would duplicate the
 464                 // (not replaced) to_stack_was item.
 465                 if (!caused_by_move_somewhere) {
 466                         // If destination stack is of different type and there are leftover
 467                         // items, attempt to put the leftover items to a different place in the
 468                         // destination inventory.
 469                         // The client-side GUI will try to guess if this happens.
 470                         if (from_stack_was.name != to_stack_was.name) {
 471                                 for (u32 i = 0; i < list_to->getSize(); i++) {
 472                                         if (list_to->getItem(i).empty()) {
 473                                                 list_to->changeItem(i, to_stack_was);
 474                                                 break;
 475                                         }
 476                                 }
 477                         }
 478                 }
 479                 if (move_count > 0 || did_swap) {
 480                         list_from->deleteItem(from_i);
 481                         list_from->addItem(from_i, from_stack_was);
 482                 }
 483         }
 484         // If destination is infinite, reset it's stack and take count from source
 485         if (dst_can_put_count == -1) {
 486                 list_to->deleteItem(to_i);
 487                 list_to->addItem(to_i, to_stack_was);
 488                 list_from->deleteItem(from_i);
 489                 list_from->addItem(from_i, from_stack_was);
 490                 list_from->takeItem(from_i, count);
 491         }
 492
 493         infostream << "IMoveAction::apply(): moved"
 494                         << " msom=" << move_somewhere
 495                         << " caused=" << caused_by_move_somewhere
 496                         << " count=" << count
 497                         << " from inv=\"" << from_inv.dump() << "\""
 498                         << " list=\"" << from_list << "\""
 499                         << " i=" << from_i
 500                         << " to inv=\"" << to_inv.dump() << "\""
 501                         << " list=\"" << to_list << "\""
 502                         << " i=" << to_i
 503                         << std::endl;
 504
 505         // If we are inside the move somewhere loop, we don't need to report
 506         // anything if nothing happened (perhaps we don't need to report
 507         // anything for caused_by_move_somewhere == true, but this way its safer)
 508         if (caused_by_move_somewhere && move_count == 0)
 509                 return;
 510
 511         /*
 512                 Record rollback information
 513         */
 514         if (!ignore_rollback && gamedef->rollback()) {
 515                 IRollbackManager *rollback = gamedef->rollback();
 516
 517                 // If source is not infinite, record item take
 518                 if (src_can_take_count != -1) {
 519                         RollbackAction action;
 520                         std::string loc;
 521                         {
 522                                 std::ostringstream os(std::ios::binary);
 523                                 from_inv.serialize(os);
 524                                 loc = os.str();
 525                         }
 526                         action.setModifyInventoryStack(loc, from_list, from_i, false,
 527                                         src_item);
 528                         rollback->reportAction(action);
 529                 }
 530                 // If destination is not infinite, record item put
 531                 if (dst_can_put_count != -1) {
 532                         RollbackAction action;
 533                         std::string loc;
 534                         {
 535                                 std::ostringstream os(std::ios::binary);
 536                                 to_inv.serialize(os);
 537                                 loc = os.str();
 538                         }
 539                         action.setModifyInventoryStack(loc, to_list, to_i, true,
 540                                         src_item);
 541                         rollback->reportAction(action);
 542                 }
 543         }
 544
 545         /*
 546                 Report move to endpoints
 547         */
 548
 549         // Source = destination => move
 550         if (from_inv == to_inv) {
 551                 onMove(count, player);
 552                 if (did_swap) {
 553                         // Item is now placed in source list
 554                         src_item = list_from->getItem(from_i);
 555                         swapDirections();
 556                         onMove(src_item.count, player);
 557                         swapDirections();
 558                 }
 559                 mgr->setInventoryModified(from_inv);
 560         } else {
 561                 onPutAndOnTake(src_item, player);
 562                 if (did_swap) {
 563                         // Item is now placed in source list
 564                         src_item = list_from->getItem(from_i);
 565                         swapDirections();
 566                         onPutAndOnTake(src_item, player);
 567                         swapDirections();
 568                 }
 569                 mgr->setInventoryModified(to_inv);
 570                 mgr->setInventoryModified(from_inv);
 571         }
 572 }
 573
 574 void IMoveAction::clientApply(InventoryManager *mgr, IGameDef *gamedef)
 575 {
 576         // Optional InventoryAction operation that is run on the client
 577         // to make lag less apparent.
 578
 579         Inventory *inv_from = mgr->getInventory(from_inv);
 580         Inventory *inv_to = mgr->getInventory(to_inv);
 581         if (!inv_from || !inv_to)
 582                 return;
 583
 584         InventoryLocation current_player;
 585         current_player.setCurrentPlayer();
 586         Inventory *inv_player = mgr->getInventory(current_player);
 587         if (inv_from != inv_player || inv_to != inv_player)
 588                 return;
 589
 590         InventoryList *list_from = inv_from->getList(from_list);
 591         InventoryList *list_to = inv_to->getList(to_list);
 592         if (!list_from || !list_to)
 593                 return;
 594
 595         if (!move_somewhere)
 596                 list_from->moveItem(from_i, list_to, to_i, count);
 597         else
 598                 list_from->moveItemSomewhere(from_i, list_to, count);
 599
 600         mgr->setInventoryModified(from_inv);
 601         if (inv_from != inv_to)
 602                 mgr->setInventoryModified(to_inv);
 603 }
 604
 605 /*
 606         IDropAction
 607 */
 608
 609 IDropAction::IDropAction(std::istream &is)
 610 {
 611         std::string ts;
 612
 613         std::getline(is, ts, ' ');
 614         count = stoi(ts);
 615
 616         std::getline(is, ts, ' ');
 617         from_inv.deSerialize(ts);
 618
 619         std::getline(is, from_list, ' ');
 620
 621         std::getline(is, ts, ' ');
 622         from_i = stoi(ts);
 623 }
 624
 625 void IDropAction::apply(InventoryManager *mgr, ServerActiveObject *player, IGameDef *gamedef)
 626 {
 627         Inventory *inv_from = mgr->getInventory(from_inv);
 628
 629         if (!inv_from) {
 630                 infostream<<"IDropAction::apply(): FAIL: source inventory not found: "
 631                                 <<"from_inv=\""<<from_inv.dump()<<"\""<<std::endl;
 632                 return;
 633         }
 634
 635         InventoryList *list_from = inv_from->getList(from_list);
 636
 637         /*
 638                 If a list doesn't exist or the source item doesn't exist
 639         */
 640         if (!list_from) {
 641                 infostream<<"IDropAction::apply(): FAIL: source list not found: "
 642                                 <<"from_inv=\""<<from_inv.dump()<<"\""<<std::endl;
 643                 return;
 644         }
 645         if (list_from->getItem(from_i).empty()) {
 646                 infostream<<"IDropAction::apply(): FAIL: source item not found: "
 647                                 <<"from_inv=\""<<from_inv.dump()<<"\""
 648                                 <<", from_list=\""<<from_list<<"\""
 649                                 <<" from_i="<<from_i<<std::endl;
 650                 return;
 651         }
 652
 653         /*
 654                 Do not handle rollback if inventory is player's
 655         */
 656         bool ignore_src_rollback = (from_inv.type == InventoryLocation::PLAYER);
 657
 658         /*
 659                 Collect information of endpoints
 660         */
 661
 662         int take_count = list_from->getItem(from_i).count;
 663         if (count != 0 && count < take_count)
 664                 take_count = count;
 665         int src_can_take_count = take_count;
 666
 667         ItemStack src_item = list_from->getItem(from_i);
 668         src_item.count = take_count;
 669
 670         // Run callbacks depending on source inventory
 671         switch (from_inv.type) {
 672         case InventoryLocation::DETACHED:
 673                 src_can_take_count = PLAYER_TO_SA(player)->detached_inventory_AllowTake(
 674                         *this, src_item, player);
 675                 break;
 676         case InventoryLocation::NODEMETA:
 677                 src_can_take_count = PLAYER_TO_SA(player)->nodemeta_inventory_AllowTake(
 678                         *this, src_item, player);
 679                 break;
 680         case InventoryLocation::PLAYER:
 681                 src_can_take_count = PLAYER_TO_SA(player)->player_inventory_AllowTake(
 682                         *this, src_item, player);
 683                 break;
 684         default:
 685                 break;
 686         }
 687
 688         if (src_can_take_count != -1 && src_can_take_count < take_count)
 689                 take_count = src_can_take_count;
 690
 691         // Update item due executed callbacks
 692         src_item = list_from->getItem(from_i);
 693
 694         // Drop the item
 695         ItemStack item1 = list_from->getItem(from_i);
 696         item1.count = take_count;
 697         if(PLAYER_TO_SA(player)->item_OnDrop(item1, player,
 698                                 player->getBasePosition())) {
 699                 int actually_dropped_count = take_count - item1.count;
 700
 701                 if (actually_dropped_count == 0) {
 702                         infostream<<"Actually dropped no items"<<std::endl;
 703
 704                         // Revert client prediction. See 'clientApply'
 705                         if (from_inv.type == InventoryLocation::PLAYER)
 706                                 list_from->setModified();
 707                         return;
 708                 }
 709
 710                 // If source isn't infinite
 711                 if (src_can_take_count != -1) {
 712                         // Take item from source list
 713                         ItemStack item2 = list_from->takeItem(from_i, actually_dropped_count);
 714
 715                         if (item2.count != actually_dropped_count)
 716                                 errorstream<<"Could not take dropped count of items"<<std::endl;
 717                 }
 718
 719                 src_item.count = actually_dropped_count;
 720                 mgr->setInventoryModified(from_inv);
 721         }
 722
 723         infostream<<"IDropAction::apply(): dropped "
 724                         <<" from inv=\""<<from_inv.dump()<<"\""
 725                         <<" list=\""<<from_list<<"\""
 726                         <<" i="<<from_i
 727                         <<std::endl;
 728
 729
 730         /*
 731                 Report drop to endpoints
 732         */
 733
 734         switch (from_inv.type) {
 735         case InventoryLocation::DETACHED:
 736                 PLAYER_TO_SA(player)->detached_inventory_OnTake(
 737                         *this, src_item, player);
 738                 break;
 739         case InventoryLocation::NODEMETA:
 740                 PLAYER_TO_SA(player)->nodemeta_inventory_OnTake(
 741                         *this, src_item, player);
 742                 break;
 743         case InventoryLocation::PLAYER:
 744                 PLAYER_TO_SA(player)->player_inventory_OnTake(
 745                         *this, src_item, player);
 746                 break;
 747         default:
 748                 break;
 749         }
 750
 751         /*
 752                 Record rollback information
 753         */
 754         if (!ignore_src_rollback && gamedef->rollback()) {
 755                 IRollbackManager *rollback = gamedef->rollback();
 756
 757                 // If source is not infinite, record item take
 758                 if (src_can_take_count != -1) {
 759                         RollbackAction action;
 760                         std::string loc;
 761                         {
 762                                 std::ostringstream os(std::ios::binary);
 763                                 from_inv.serialize(os);
 764                                 loc = os.str();
 765                         }
 766                         action.setModifyInventoryStack(loc, from_list, from_i,
 767                                         false, src_item);
 768                         rollback->reportAction(action);
 769                 }
 770         }
 771 }
 772
 773 void IDropAction::clientApply(InventoryManager *mgr, IGameDef *gamedef)
 774 {
 775         // Optional InventoryAction operation that is run on the client
 776         // to make lag less apparent.
 777
 778         Inventory *inv_from = mgr->getInventory(from_inv);
 779         if (!inv_from)
 780                 return;
 781
 782         InventoryLocation current_player;
 783         current_player.setCurrentPlayer();
 784         Inventory *inv_player = mgr->getInventory(current_player);
 785         if (inv_from != inv_player)
 786                 return;
 787
 788         InventoryList *list_from = inv_from->getList(from_list);
 789         if (!list_from)
 790                 return;
 791
 792         if (count == 0)
 793                 list_from->changeItem(from_i, ItemStack());
 794         else
 795                 list_from->takeItem(from_i, count);
 796
 797         mgr->setInventoryModified(from_inv);
 798 }
 799
 800 /*
 801         ICraftAction
 802 */
 803
 804 ICraftAction::ICraftAction(std::istream &is)
 805 {
 806         std::string ts;
 807
 808         std::getline(is, ts, ' ');
 809         count = stoi(ts);
 810
 811         std::getline(is, ts, ' ');
 812         craft_inv.deSerialize(ts);
 813 }
 814
 815 void ICraftAction::apply(InventoryManager *mgr,
 816         ServerActiveObject *player, IGameDef *gamedef)
 817 {
 818         Inventory *inv_craft = mgr->getInventory(craft_inv);
 819
 820         if (!inv_craft) {
 821                 infostream << "ICraftAction::apply(): FAIL: inventory not found: "
 822                                 << "craft_inv=\"" << craft_inv.dump() << "\"" << std::endl;
 823                 return;
 824         }
 825
 826         InventoryList *list_craft = inv_craft->getList("craft");
 827         InventoryList *list_craftresult = inv_craft->getList("craftresult");
 828         InventoryList *list_main = inv_craft->getList("main");
 829
 830         /*
 831                 If a list doesn't exist or the source item doesn't exist
 832         */
 833         if (!list_craft) {
 834                 infostream << "ICraftAction::apply(): FAIL: craft list not found: "
 835                                 << "craft_inv=\"" << craft_inv.dump() << "\"" << std::endl;
 836                 return;
 837         }
 838         if (!list_craftresult) {
 839                 infostream << "ICraftAction::apply(): FAIL: craftresult list not found: "
 840                                 << "craft_inv=\"" << craft_inv.dump() << "\"" << std::endl;
 841                 return;
 842         }
 843         if (list_craftresult->getSize() < 1) {
 844                 infostream << "ICraftAction::apply(): FAIL: craftresult list too short: "
 845                                 << "craft_inv=\"" << craft_inv.dump() << "\"" << std::endl;
 846                 return;
 847         }
 848
 849         ItemStack crafted;
 850         ItemStack craftresultitem;
 851         int count_remaining = count;
 852         std::vector<ItemStack> output_replacements;
 853         getCraftingResult(inv_craft, crafted, output_replacements, false, gamedef);
 854         PLAYER_TO_SA(player)->item_CraftPredict(crafted, player, list_craft, craft_inv);
 855         bool found = !crafted.empty();
 856
 857         while (found && list_craftresult->itemFits(0, crafted)) {
 858                 InventoryList saved_craft_list = *list_craft;
 859
 860                 std::vector<ItemStack> temp;
 861                 // Decrement input and add crafting output
 862                 getCraftingResult(inv_craft, crafted, temp, true, gamedef);
 863                 PLAYER_TO_SA(player)->item_OnCraft(crafted, player, &saved_craft_list, craft_inv);
 864                 list_craftresult->addItem(0, crafted);
 865                 mgr->setInventoryModified(craft_inv);
 866
 867                 // Add the new replacements to the list
 868                 IItemDefManager *itemdef = gamedef->getItemDefManager();
 869                 for (auto &itemstack : temp) {
 870                         for (auto &output_replacement : output_replacements) {
 871                                 if (itemstack.name == output_replacement.name) {
 872                                         itemstack = output_replacement.addItem(itemstack, itemdef);
 873                                         if (itemstack.empty())
 874                                                 continue;
 875                                 }
 876                         }
 877                         output_replacements.push_back(itemstack);
 878                 }
 879
 880                 actionstream << player->getDescription()
 881                                 << " crafts "
 882                                 << crafted.getItemString()
 883                                 << std::endl;
 884
 885                 // Decrement counter
 886                 if (count_remaining == 1)
 887                         break;
 888
 889                 if (count_remaining > 1)
 890                         count_remaining--;
 891
 892                 // Get next crafting result
 893                 getCraftingResult(inv_craft, crafted, temp, false, gamedef);
 894                 PLAYER_TO_SA(player)->item_CraftPredict(crafted, player, list_craft, craft_inv);
 895                 found = !crafted.empty();
 896         }
 897
 898         // Put the replacements in the inventory or drop them on the floor, if
 899         // the inventory is full
 900         for (auto &output_replacement : output_replacements) {
 901                 if (list_main)
 902                         output_replacement = list_main->addItem(output_replacement);
 903                 if (output_replacement.empty())
 904                         continue;
 905                 u16 count = output_replacement.count;
 906                 do {
 907                         PLAYER_TO_SA(player)->item_OnDrop(output_replacement, player,
 908                                 player->getBasePosition());
 909                         if (count >= output_replacement.count) {
 910                                 errorstream << "Couldn't drop replacement stack " <<
 911                                         output_replacement.getItemString() << " because drop loop didn't "
 912                                         "decrease count." << std::endl;
 913
 914                                 break;
 915                         }
 916                 } while (!output_replacement.empty());
 917         }
 918
 919         infostream<<"ICraftAction::apply(): crafted "
 920                         <<" craft_inv=\""<<craft_inv.dump()<<"\""
 921                         <<std::endl;
 922 }
 923
 924 void ICraftAction::clientApply(InventoryManager *mgr, IGameDef *gamedef)
 925 {
 926         // Optional InventoryAction operation that is run on the client
 927         // to make lag less apparent.
 928 }
 929
 930
 931 // Crafting helper
 932 bool getCraftingResult(Inventory *inv, ItemStack &result,
 933                 std::vector<ItemStack> &output_replacements,
 934                 bool decrementInput, IGameDef *gamedef)
 935 {
 936         result.clear();
 937
 938         // Get the InventoryList in which we will operate
 939         InventoryList *clist = inv->getList("craft");
 940         if (!clist)
 941                 return false;
 942
 943         // Mangle crafting grid to an another format
 944         CraftInput ci;
 945         ci.method = CRAFT_METHOD_NORMAL;
 946         ci.width = clist->getWidth() ? clist->getWidth() : 3;
 947         for (u16 i=0; i < clist->getSize(); i++)
 948                 ci.items.push_back(clist->getItem(i));
 949
 950         // Find out what is crafted and add it to result item slot
 951         CraftOutput co;
 952         bool found = gamedef->getCraftDefManager()->getCraftResult(
 953                         ci, co, output_replacements, decrementInput, gamedef);
 954         if (found)
 955                 result.deSerialize(co.item, gamedef->getItemDefManager());
 956
 957         if (found && decrementInput) {
 958                 // CraftInput has been changed, apply changes in clist
 959                 for (u16 i=0; i < clist->getSize(); i++) {
 960                         clist->changeItem(i, ci.items[i]);
 961                 }
 962         }
 963
 964         return found;
 965 }
 966