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                                 assert(move_count <= count);
 305                                 count -= move_count;
 306                         }
 307                 }
 308
 309                 // Then try all the empty ones
 310                 for (s16 dest_i = 0; dest_i < dest_size && count > 0; dest_i++) {
 311                         if (list_to->getItem(dest_i).empty()) {
 312                                 to_i = dest_i;
 313                                 apply(mgr, player, gamedef);
 314                                 count -= move_count;
 315                         }
 316                 }
 317
 318                 to_i = old_to_i;
 319                 count = old_count;
 320                 caused_by_move_somewhere = false;
 321                 move_somewhere = true;
 322                 return;
 323         }
 324
 325         if ((u16)to_i > list_to->getSize()) {
 326                 infostream << "IMoveAction::apply(): FAIL: destination index out of bounds: "
 327                         << "to_i=" << to_i
 328                         << ", size=" << list_to->getSize() << std::endl;
 329                 return;
 330         }
 331         /*
 332                 Do not handle rollback if both inventories are that of the same player
 333         */
 334         bool ignore_rollback = (
 335                 from_inv.type == InventoryLocation::PLAYER &&
 336                 from_inv == to_inv);
 337
 338         /*
 339                 Collect information of endpoints
 340         */
 341
 342         ItemStack src_item = list_from->getItem(from_i);
 343         if (count > 0 && count < src_item.count)
 344                 src_item.count = count;
 345         if (src_item.empty())
 346                 return;
 347
 348         int src_can_take_count = 0xffff;
 349         int dst_can_put_count = 0xffff;
 350
 351         // this is needed for swapping items inside one inventory to work
 352         ItemStack restitem;
 353         bool allow_swap = !list_to->itemFits(to_i, src_item, &restitem)
 354                 && restitem.count == src_item.count
 355                 && !caused_by_move_somewhere;
 356         move_count = src_item.count - restitem.count;
 357
 358         // Shift-click: Cannot fill this stack, proceed with next slot
 359         if (caused_by_move_somewhere && move_count == 0) {
 360                 return;
 361         }
 362
 363         if (allow_swap) {
 364                 // Swap will affect the entire stack if it can performed.
 365                 src_item = list_from->getItem(from_i);
 366                 count = src_item.count;
 367         }
 368
 369         if (from_inv == to_inv) {
 370                 // Move action within the same inventory
 371                 src_can_take_count = allowMove(src_item.count, player);
 372
 373                 bool swap_expected = allow_swap;
 374                 allow_swap = allow_swap
 375                         && (src_can_take_count == -1 || src_can_take_count >= src_item.count);
 376                 if (allow_swap) {
 377                         int try_put_count = list_to->getItem(to_i).count;
 378                         swapDirections();
 379                         dst_can_put_count = allowMove(try_put_count, player);
 380                         allow_swap = allow_swap
 381                                 && (dst_can_put_count == -1 || dst_can_put_count >= try_put_count);
 382                         swapDirections();
 383                 } else {
 384                         dst_can_put_count = src_can_take_count;
 385                 }
 386                 if (swap_expected != allow_swap)
 387                         src_can_take_count = dst_can_put_count = 0;
 388         } else {
 389                 // Take from one inventory, put into another
 390                 int src_item_count = src_item.count;
 391                 if (caused_by_move_somewhere)
 392                         // When moving somewhere: temporarily use the actual movable stack
 393                         // size to ensure correct callback execution.
 394                         src_item.count = move_count;
 395                 dst_can_put_count = allowPut(src_item, player);
 396                 src_can_take_count = allowTake(src_item, player);
 397                 if (caused_by_move_somewhere)
 398                         // Reset source item count
 399                         src_item.count = src_item_count;
 400                 bool swap_expected = allow_swap;
 401                 allow_swap = allow_swap
 402                         && (src_can_take_count == -1 || src_can_take_count >= src_item.count)
 403                         && (dst_can_put_count == -1 || dst_can_put_count >= src_item.count);
 404                 // A swap is expected, which means that we have to
 405                 // run the "allow" callbacks a second time with swapped inventories
 406                 if (allow_swap) {
 407                         ItemStack dst_item = list_to->getItem(to_i);
 408                         swapDirections();
 409
 410                         int src_can_take = allowPut(dst_item, player);
 411                         int dst_can_put = allowTake(dst_item, player);
 412                         allow_swap = allow_swap
 413                                 && (src_can_take == -1 || src_can_take >= dst_item.count)
 414                                 && (dst_can_put == -1 || dst_can_put >= dst_item.count);
 415                         swapDirections();
 416                 }
 417                 if (swap_expected != allow_swap)
 418                         src_can_take_count = dst_can_put_count = 0;
 419         }
 420
 421         int old_count = count;
 422
 423         /* Modify count according to collected data */
 424         count = src_item.count;
 425         if (src_can_take_count != -1 && count > src_can_take_count)
 426                 count = src_can_take_count;
 427         if (dst_can_put_count != -1 && count > dst_can_put_count)
 428                 count = dst_can_put_count;
 429
 430         /* Limit according to source item count */
 431         if (count > list_from->getItem(from_i).count)
 432                 count = list_from->getItem(from_i).count;
 433
 434         /* If no items will be moved, don't go further */
 435         if (count == 0) {
 436                 if (caused_by_move_somewhere)
 437                         // Set move count to zero, as no items have been moved
 438                         move_count = 0;
 439
 440                 // Undo client prediction. See 'clientApply'
 441                 if (from_inv.type == InventoryLocation::PLAYER)
 442                         list_from->setModified();
 443
 444                 if (to_inv.type == InventoryLocation::PLAYER)
 445                         list_to->setModified();
 446
 447                 infostream<<"IMoveAction::apply(): move was completely disallowed:"
 448                                 <<" count="<<old_count
 449                                 <<" from inv=\""<<from_inv.dump()<<"\""
 450                                 <<" list=\""<<from_list<<"\""
 451                                 <<" i="<<from_i
 452                                 <<" to inv=\""<<to_inv.dump()<<"\""
 453                                 <<" list=\""<<to_list<<"\""
 454                                 <<" i="<<to_i
 455                                 <<std::endl;
 456
 457                 return;
 458         }
 459
 460         src_item = list_from->getItem(from_i);
 461         src_item.count = count;
 462         ItemStack from_stack_was = list_from->getItem(from_i);
 463         ItemStack to_stack_was = list_to->getItem(to_i);
 464
 465         /*
 466                 Perform actual move
 467
 468                 If something is wrong (source item is empty, destination is the
 469                 same as source), nothing happens
 470         */
 471         bool did_swap = false;
 472         move_count = list_from->moveItem(from_i,
 473                 list_to, to_i, count, allow_swap, &did_swap);
 474         if (caused_by_move_somewhere)
 475                 count = old_count;
 476         assert(allow_swap == did_swap);
 477
 478         // If source is infinite, reset it's stack
 479         if (src_can_take_count == -1) {
 480                 // For the caused_by_move_somewhere == true case we didn't force-put the item,
 481                 // which guarantees there is no leftover, and code below would duplicate the
 482                 // (not replaced) to_stack_was item.
 483                 if (!caused_by_move_somewhere) {
 484                         // If destination stack is of different type and there are leftover
 485                         // items, attempt to put the leftover items to a different place in the
 486                         // destination inventory.
 487                         // The client-side GUI will try to guess if this happens.
 488                         if (from_stack_was.name != to_stack_was.name) {
 489                                 for (u32 i = 0; i < list_to->getSize(); i++) {
 490                                         if (list_to->getItem(i).empty()) {
 491                                                 list_to->changeItem(i, to_stack_was);
 492                                                 break;
 493                                         }
 494                                 }
 495                         }
 496                 }
 497                 if (move_count > 0 || did_swap) {
 498                         list_from->deleteItem(from_i);
 499                         list_from->addItem(from_i, from_stack_was);
 500                 }
 501         }
 502         // If destination is infinite, reset it's stack and take count from source
 503         if (dst_can_put_count == -1) {
 504                 list_to->deleteItem(to_i);
 505                 list_to->addItem(to_i, to_stack_was);
 506                 list_from->deleteItem(from_i);
 507                 list_from->addItem(from_i, from_stack_was);
 508                 list_from->takeItem(from_i, count);
 509         }
 510
 511         infostream << "IMoveAction::apply(): moved"
 512                         << " msom=" << move_somewhere
 513                         << " caused=" << caused_by_move_somewhere
 514                         << " count=" << count
 515                         << " from inv=\"" << from_inv.dump() << "\""
 516                         << " list=\"" << from_list << "\""
 517                         << " i=" << from_i
 518                         << " to inv=\"" << to_inv.dump() << "\""
 519                         << " list=\"" << to_list << "\""
 520                         << " i=" << to_i
 521                         << std::endl;
 522
 523         // If we are inside the move somewhere loop, we don't need to report
 524         // anything if nothing happened
 525         if (caused_by_move_somewhere && move_count == 0)
 526                 return;
 527
 528         /*
 529                 Record rollback information
 530         */
 531         if (!ignore_rollback && gamedef->rollback()) {
 532                 IRollbackManager *rollback = gamedef->rollback();
 533
 534                 // If source is not infinite, record item take
 535                 if (src_can_take_count != -1) {
 536                         RollbackAction action;
 537                         std::string loc;
 538                         {
 539                                 std::ostringstream os(std::ios::binary);
 540                                 from_inv.serialize(os);
 541                                 loc = os.str();
 542                         }
 543                         action.setModifyInventoryStack(loc, from_list, from_i, false,
 544                                         src_item);
 545                         rollback->reportAction(action);
 546                 }
 547                 // If destination is not infinite, record item put
 548                 if (dst_can_put_count != -1) {
 549                         RollbackAction action;
 550                         std::string loc;
 551                         {
 552                                 std::ostringstream os(std::ios::binary);
 553                                 to_inv.serialize(os);
 554                                 loc = os.str();
 555                         }
 556                         action.setModifyInventoryStack(loc, to_list, to_i, true,
 557                                         src_item);
 558                         rollback->reportAction(action);
 559                 }
 560         }
 561
 562         /*
 563                 Report move to endpoints
 564         */
 565
 566         // Source = destination => move
 567         if (from_inv == to_inv) {
 568                 onMove(count, player);
 569                 if (did_swap) {
 570                         // Item is now placed in source list
 571                         src_item = list_from->getItem(from_i);
 572                         swapDirections();
 573                         onMove(src_item.count, player);
 574                         swapDirections();
 575                 }
 576                 mgr->setInventoryModified(from_inv);
 577         } else {
 578                 int src_item_count = src_item.count;
 579                 if (caused_by_move_somewhere)
 580                         // When moving somewhere: temporarily use the actual movable stack
 581                         // size to ensure correct callback execution.
 582                         src_item.count = move_count;
 583                 onPutAndOnTake(src_item, player);
 584                 if (caused_by_move_somewhere)
 585                         // Reset source item count
 586                         src_item.count = src_item_count;
 587                 if (did_swap) {
 588                         // Item is now placed in source list
 589                         src_item = list_from->getItem(from_i);
 590                         swapDirections();
 591                         onPutAndOnTake(src_item, player);
 592                         swapDirections();
 593                 }
 594                 mgr->setInventoryModified(to_inv);
 595                 mgr->setInventoryModified(from_inv);
 596         }
 597 }
 598
 599 void IMoveAction::clientApply(InventoryManager *mgr, IGameDef *gamedef)
 600 {
 601         // Optional InventoryAction operation that is run on the client
 602         // to make lag less apparent.
 603
 604         Inventory *inv_from = mgr->getInventory(from_inv);
 605         Inventory *inv_to = mgr->getInventory(to_inv);
 606         if (!inv_from || !inv_to)
 607                 return;
 608
 609         InventoryLocation current_player;
 610         current_player.setCurrentPlayer();
 611         Inventory *inv_player = mgr->getInventory(current_player);
 612         if (inv_from != inv_player || inv_to != inv_player)
 613                 return;
 614
 615         InventoryList *list_from = inv_from->getList(from_list);
 616         InventoryList *list_to = inv_to->getList(to_list);
 617         if (!list_from || !list_to)
 618                 return;
 619
 620         if (!move_somewhere)
 621                 list_from->moveItem(from_i, list_to, to_i, count);
 622         else
 623                 list_from->moveItemSomewhere(from_i, list_to, count);
 624
 625         mgr->setInventoryModified(from_inv);
 626         if (inv_from != inv_to)
 627                 mgr->setInventoryModified(to_inv);
 628 }
 629
 630 /*
 631         IDropAction
 632 */
 633
 634 IDropAction::IDropAction(std::istream &is)
 635 {
 636         std::string ts;
 637
 638         std::getline(is, ts, ' ');
 639         count = stoi(ts);
 640
 641         std::getline(is, ts, ' ');
 642         from_inv.deSerialize(ts);
 643
 644         std::getline(is, from_list, ' ');
 645
 646         std::getline(is, ts, ' ');
 647         from_i = stoi(ts);
 648 }
 649
 650 void IDropAction::apply(InventoryManager *mgr, ServerActiveObject *player, IGameDef *gamedef)
 651 {
 652         Inventory *inv_from = mgr->getInventory(from_inv);
 653
 654         if (!inv_from) {
 655                 infostream<<"IDropAction::apply(): FAIL: source inventory not found: "
 656                                 <<"from_inv=\""<<from_inv.dump()<<"\""<<std::endl;
 657                 return;
 658         }
 659
 660         InventoryList *list_from = inv_from->getList(from_list);
 661
 662         /*
 663                 If a list doesn't exist or the source item doesn't exist
 664         */
 665         if (!list_from) {
 666                 infostream<<"IDropAction::apply(): FAIL: source list not found: "
 667                                 <<"from_inv=\""<<from_inv.dump()<<"\""<<std::endl;
 668                 return;
 669         }
 670         if (list_from->getItem(from_i).empty()) {
 671                 infostream<<"IDropAction::apply(): FAIL: source item not found: "
 672                                 <<"from_inv=\""<<from_inv.dump()<<"\""
 673                                 <<", from_list=\""<<from_list<<"\""
 674                                 <<" from_i="<<from_i<<std::endl;
 675                 return;
 676         }
 677
 678         /*
 679                 Do not handle rollback if inventory is player's
 680         */
 681         bool ignore_src_rollback = (from_inv.type == InventoryLocation::PLAYER);
 682
 683         /*
 684                 Collect information of endpoints
 685         */
 686
 687         int take_count = list_from->getItem(from_i).count;
 688         if (count != 0 && count < take_count)
 689                 take_count = count;
 690         int src_can_take_count = take_count;
 691
 692         ItemStack src_item = list_from->getItem(from_i);
 693         src_item.count = take_count;
 694
 695         // Run callbacks depending on source inventory
 696         switch (from_inv.type) {
 697         case InventoryLocation::DETACHED:
 698                 src_can_take_count = PLAYER_TO_SA(player)->detached_inventory_AllowTake(
 699                         *this, src_item, player);
 700                 break;
 701         case InventoryLocation::NODEMETA:
 702                 src_can_take_count = PLAYER_TO_SA(player)->nodemeta_inventory_AllowTake(
 703                         *this, src_item, player);
 704                 break;
 705         case InventoryLocation::PLAYER:
 706                 src_can_take_count = PLAYER_TO_SA(player)->player_inventory_AllowTake(
 707                         *this, src_item, player);
 708                 break;
 709         default:
 710                 break;
 711         }
 712
 713         if (src_can_take_count != -1 && src_can_take_count < take_count)
 714                 take_count = src_can_take_count;
 715
 716         // Update item due executed callbacks
 717         src_item = list_from->getItem(from_i);
 718
 719         // Drop the item
 720         ItemStack item1 = list_from->getItem(from_i);
 721         item1.count = take_count;
 722         if(PLAYER_TO_SA(player)->item_OnDrop(item1, player,
 723                                 player->getBasePosition())) {
 724                 int actually_dropped_count = take_count - item1.count;
 725
 726                 if (actually_dropped_count == 0) {
 727                         infostream<<"Actually dropped no items"<<std::endl;
 728
 729                         // Revert client prediction. See 'clientApply'
 730                         if (from_inv.type == InventoryLocation::PLAYER)
 731                                 list_from->setModified();
 732                         return;
 733                 }
 734
 735                 // If source isn't infinite
 736                 if (src_can_take_count != -1) {
 737                         // Take item from source list
 738                         ItemStack item2 = list_from->takeItem(from_i, actually_dropped_count);
 739
 740                         if (item2.count != actually_dropped_count)
 741                                 errorstream<<"Could not take dropped count of items"<<std::endl;
 742                 }
 743
 744                 src_item.count = actually_dropped_count;
 745                 mgr->setInventoryModified(from_inv);
 746         }
 747
 748         infostream<<"IDropAction::apply(): dropped "
 749                         <<" from inv=\""<<from_inv.dump()<<"\""
 750                         <<" list=\""<<from_list<<"\""
 751                         <<" i="<<from_i
 752                         <<std::endl;
 753
 754
 755         /*
 756                 Report drop to endpoints
 757         */
 758
 759         switch (from_inv.type) {
 760         case InventoryLocation::DETACHED:
 761                 PLAYER_TO_SA(player)->detached_inventory_OnTake(
 762                         *this, src_item, player);
 763                 break;
 764         case InventoryLocation::NODEMETA:
 765                 PLAYER_TO_SA(player)->nodemeta_inventory_OnTake(
 766                         *this, src_item, player);
 767                 break;
 768         case InventoryLocation::PLAYER:
 769                 PLAYER_TO_SA(player)->player_inventory_OnTake(
 770                         *this, src_item, player);
 771                 break;
 772         default:
 773                 break;
 774         }
 775
 776         /*
 777                 Record rollback information
 778         */
 779         if (!ignore_src_rollback && gamedef->rollback()) {
 780                 IRollbackManager *rollback = gamedef->rollback();
 781
 782                 // If source is not infinite, record item take
 783                 if (src_can_take_count != -1) {
 784                         RollbackAction action;
 785                         std::string loc;
 786                         {
 787                                 std::ostringstream os(std::ios::binary);
 788                                 from_inv.serialize(os);
 789                                 loc = os.str();
 790                         }
 791                         action.setModifyInventoryStack(loc, from_list, from_i,
 792                                         false, src_item);
 793                         rollback->reportAction(action);
 794                 }
 795         }
 796 }
 797
 798 void IDropAction::clientApply(InventoryManager *mgr, IGameDef *gamedef)
 799 {
 800         // Optional InventoryAction operation that is run on the client
 801         // to make lag less apparent.
 802
 803         Inventory *inv_from = mgr->getInventory(from_inv);
 804         if (!inv_from)
 805                 return;
 806
 807         InventoryLocation current_player;
 808         current_player.setCurrentPlayer();
 809         Inventory *inv_player = mgr->getInventory(current_player);
 810         if (inv_from != inv_player)
 811                 return;
 812
 813         InventoryList *list_from = inv_from->getList(from_list);
 814         if (!list_from)
 815                 return;
 816
 817         if (count == 0)
 818                 list_from->changeItem(from_i, ItemStack());
 819         else
 820                 list_from->takeItem(from_i, count);
 821
 822         mgr->setInventoryModified(from_inv);
 823 }
 824
 825 /*
 826         ICraftAction
 827 */
 828
 829 ICraftAction::ICraftAction(std::istream &is)
 830 {
 831         std::string ts;
 832
 833         std::getline(is, ts, ' ');
 834         count = stoi(ts);
 835
 836         std::getline(is, ts, ' ');
 837         craft_inv.deSerialize(ts);
 838 }
 839
 840 void ICraftAction::apply(InventoryManager *mgr,
 841         ServerActiveObject *player, IGameDef *gamedef)
 842 {
 843         Inventory *inv_craft = mgr->getInventory(craft_inv);
 844
 845         if (!inv_craft) {
 846                 infostream << "ICraftAction::apply(): FAIL: inventory not found: "
 847                                 << "craft_inv=\"" << craft_inv.dump() << "\"" << std::endl;
 848                 return;
 849         }
 850
 851         InventoryList *list_craft = inv_craft->getList("craft");
 852         InventoryList *list_craftresult = inv_craft->getList("craftresult");
 853         InventoryList *list_main = inv_craft->getList("main");
 854
 855         /*
 856                 If a list doesn't exist or the source item doesn't exist
 857         */
 858         if (!list_craft) {
 859                 infostream << "ICraftAction::apply(): FAIL: craft list not found: "
 860                                 << "craft_inv=\"" << craft_inv.dump() << "\"" << std::endl;
 861                 return;
 862         }
 863         if (!list_craftresult) {
 864                 infostream << "ICraftAction::apply(): FAIL: craftresult list not found: "
 865                                 << "craft_inv=\"" << craft_inv.dump() << "\"" << std::endl;
 866                 return;
 867         }
 868         if (list_craftresult->getSize() < 1) {
 869                 infostream << "ICraftAction::apply(): FAIL: craftresult list too short: "
 870                                 << "craft_inv=\"" << craft_inv.dump() << "\"" << std::endl;
 871                 return;
 872         }
 873
 874         ItemStack crafted;
 875         ItemStack craftresultitem;
 876         int count_remaining = count;
 877         std::vector<ItemStack> output_replacements;
 878         getCraftingResult(inv_craft, crafted, output_replacements, false, gamedef);
 879         PLAYER_TO_SA(player)->item_CraftPredict(crafted, player, list_craft, craft_inv);
 880         bool found = !crafted.empty();
 881
 882         while (found && list_craftresult->itemFits(0, crafted)) {
 883                 InventoryList saved_craft_list = *list_craft;
 884
 885                 std::vector<ItemStack> temp;
 886                 // Decrement input and add crafting output
 887                 getCraftingResult(inv_craft, crafted, temp, true, gamedef);
 888                 PLAYER_TO_SA(player)->item_OnCraft(crafted, player, &saved_craft_list, craft_inv);
 889                 list_craftresult->addItem(0, crafted);
 890                 mgr->setInventoryModified(craft_inv);
 891
 892                 // Add the new replacements to the list
 893                 IItemDefManager *itemdef = gamedef->getItemDefManager();
 894                 for (auto &itemstack : temp) {
 895                         for (auto &output_replacement : output_replacements) {
 896                                 if (itemstack.name == output_replacement.name) {
 897                                         itemstack = output_replacement.addItem(itemstack, itemdef);
 898                                         if (itemstack.empty())
 899                                                 continue;
 900                                 }
 901                         }
 902                         output_replacements.push_back(itemstack);
 903                 }
 904
 905                 actionstream << player->getDescription()
 906                                 << " crafts "
 907                                 << crafted.getItemString()
 908                                 << std::endl;
 909
 910                 // Decrement counter
 911                 if (count_remaining == 1)
 912                         break;
 913
 914                 if (count_remaining > 1)
 915                         count_remaining--;
 916
 917                 // Get next crafting result
 918                 getCraftingResult(inv_craft, crafted, temp, false, gamedef);
 919                 PLAYER_TO_SA(player)->item_CraftPredict(crafted, player, list_craft, craft_inv);
 920                 found = !crafted.empty();
 921         }
 922
 923         // Put the replacements in the inventory or drop them on the floor, if
 924         // the inventory is full
 925         for (auto &output_replacement : output_replacements) {
 926                 if (list_main)
 927                         output_replacement = list_main->addItem(output_replacement);
 928                 if (output_replacement.empty())
 929                         continue;
 930                 u16 count = output_replacement.count;
 931                 do {
 932                         PLAYER_TO_SA(player)->item_OnDrop(output_replacement, player,
 933                                 player->getBasePosition());
 934                         if (count >= output_replacement.count) {
 935                                 errorstream << "Couldn't drop replacement stack " <<
 936                                         output_replacement.getItemString() << " because drop loop didn't "
 937                                         "decrease count." << std::endl;
 938
 939                                 break;
 940                         }
 941                 } while (!output_replacement.empty());
 942         }
 943
 944         infostream<<"ICraftAction::apply(): crafted "
 945                         <<" craft_inv=\""<<craft_inv.dump()<<"\""
 946                         <<std::endl;
 947 }
 948
 949 void ICraftAction::clientApply(InventoryManager *mgr, IGameDef *gamedef)
 950 {
 951         // Optional InventoryAction operation that is run on the client
 952         // to make lag less apparent.
 953 }
 954
 955
 956 // Crafting helper
 957 bool getCraftingResult(Inventory *inv, ItemStack &result,
 958                 std::vector<ItemStack> &output_replacements,
 959                 bool decrementInput, IGameDef *gamedef)
 960 {
 961         result.clear();
 962
 963         // Get the InventoryList in which we will operate
 964         InventoryList *clist = inv->getList("craft");
 965         if (!clist)
 966                 return false;
 967
 968         // Mangle crafting grid to an another format
 969         CraftInput ci;
 970         ci.method = CRAFT_METHOD_NORMAL;
 971         ci.width = clist->getWidth() ? clist->getWidth() : 3;
 972         for (u16 i=0; i < clist->getSize(); i++)
 973                 ci.items.push_back(clist->getItem(i));
 974
 975         // Find out what is crafted and add it to result item slot
 976         CraftOutput co;
 977         bool found = gamedef->getCraftDefManager()->getCraftResult(
 978                         ci, co, output_replacements, decrementInput, gamedef);
 979         if (found)
 980                 result.deSerialize(co.item, gamedef->getItemDefManager());
 981
 982         if (found && decrementInput) {
 983                 // CraftInput has been changed, apply changes in clist
 984                 for (u16 i=0; i < clist->getSize(); i++) {
 985                         clist->changeItem(i, ci.items[i]);
 986                 }
 987         }
 988
 989         return found;
 990 }
 991