1

/* $Id$ */

     2

     3

#include "stdafx.h"

     4

#include "openttd.h"

     5

#include "roadveh.h"

     6

#include "ship.h"

     7

#include "table/strings.h"

     8

#include "news.h"

     9

#include "player.h"

    10

#include "engine.h"

    11

#include "debug.h"

    12

#include "vehicle_gui.h"

    13

#include "depot.h"

    14

#include "train.h"

    15

#include "aircraft.h"

    16

#include "cargotype.h"

    17

#include "group.h"

    18

#include "order.h"

    19

#include "strings_func.h"

    20

#include "command_func.h"

    21

#include "vehicle_func.h"

    22

#include "functions.h"

    24

    25

/*

    26

 * move the cargo from one engine to another if possible

    27

 */

    28

static void MoveVehicleCargo(Vehicle *dest, Vehicle *source)

    29

{

    30

	Vehicle *v = dest;

    31

    32

	do {

    33

		do {

    34

			if (source->cargo_type != dest->cargo_type)

    35

				continue; // cargo not compatible

    36

    37

			if (dest->cargo.Count() == dest->cargo_cap)

    38

				continue; // the destination vehicle is already full

    39

    40

			uint units_moved = min(source->cargo.Count(), dest->cargo_cap - dest->cargo.Count());

    41

			source->cargo.MoveTo(&dest->cargo, units_moved);

    42

    43

			// copy the age of the cargo

    44

			dest->day_counter  = source->day_counter;

    45

			dest->tick_counter = source->tick_counter;

    46

    47

		} while (source->cargo.Count() > 0 && (dest = dest->Next()) != NULL);

    48

		dest = v;

    49

	} while ((source = source->Next()) != NULL);

    50

    51

	/*

    52

	 * The of the train will be incorrect at this moment. This is due

    53

	 * to the fact that removing the old wagon updates the weight of

    54

	 * the complete train, which is without the weight of cargo we just

    55

	 * moved back into some (of the) new wagon(s).

    56

	 */

    57

	if (dest->type == VEH_TRAIN) TrainConsistChanged(dest->First());

    58

}

    59

    60

static bool VerifyAutoreplaceRefitForOrders(const Vehicle *v, const EngineID engine_type)

    61

{

    62

	const Order *o;

    63

	const Vehicle *u;

    64

    65

	if (v->type == VEH_TRAIN) {

    66

		u = v->First();

    67

	} else {

    68

		u = v;

    69

	}

    70

    71

	FOR_VEHICLE_ORDERS(u, o) {

    72

		if (!(o->refit_cargo < NUM_CARGO)) continue;

    73

		if (!CanRefitTo(v->engine_type, o->refit_cargo)) continue;

    74

		if (!CanRefitTo(engine_type, o->refit_cargo)) return false;

    75

	}

    76

    77

	return true;

    78

}

    79

    80

/**

    81

 * Function to find what type of cargo to refit to when autoreplacing

    82

 * @param *v Original vehicle, that is being replaced

    83

 * @param engine_type The EngineID of the vehicle that is being replaced to

    84

 * @return The cargo type to replace to

    85

 *    CT_NO_REFIT is returned if no refit is needed

    86

 *    CT_INVALID is returned when both old and new vehicle got cargo capacity and refitting the new one to the old one's cargo type isn't possible

    87

 */

    88

static CargoID GetNewCargoTypeForReplace(Vehicle *v, EngineID engine_type)

    89

{

    90

	CargoID new_cargo_type = GetEngineCargoType(engine_type);

    91

    92

	if (new_cargo_type == CT_INVALID) return CT_NO_REFIT; // Don't try to refit an engine with no cargo capacity

    93

    94

	if (v->cargo_type == new_cargo_type || CanRefitTo(engine_type, v->cargo_type)) {

    95

		if (VerifyAutoreplaceRefitForOrders(v, engine_type)) {

    96

			return v->cargo_type == new_cargo_type ? (CargoID)CT_NO_REFIT : v->cargo_type;

    97

		} else {

    98

			return CT_INVALID;

    99

		}

   100

	}

   101

	if (v->type != VEH_TRAIN) return CT_INVALID; // We can't refit the vehicle to carry the cargo we want

   102

   103

	/* Below this line it's safe to assume that the vehicle in question is a train */

   104

   105

	if (v->cargo_cap != 0) return CT_INVALID; // trying to replace a vehicle with cargo capacity into another one with incompatible cargo type

   106

   107

	/* the old engine didn't have cargo capacity, but the new one does

   108

	 * now we will figure out what cargo the train is carrying and refit to fit this */

   109

	v = v->First();

   110

	do {

   111

		if (v->cargo_cap == 0) continue;

   112

		/* Now we found a cargo type being carried on the train and we will see if it is possible to carry to this one */

   113

		if (v->cargo_type == new_cargo_type) return CT_NO_REFIT;

   114

		if (CanRefitTo(engine_type, v->cargo_type)) return v->cargo_type;

   115

	} while ((v = v->Next()) != NULL);

   116

	return CT_NO_REFIT; // We failed to find a cargo type on the old vehicle and we will not refit the new one

   117

}

   118

   119

/* Replaces a vehicle (used to be called autorenew)

   120

 * This function is only called from MaybeReplaceVehicle()

   121

 * Must be called with _current_player set to the owner of the vehicle

   122

 * @param w Vehicle to replace

   123

 * @param flags is the flags to use when calling DoCommand(). Mainly DC_EXEC counts

   124

 * @return value is cost of the replacement or CMD_ERROR

   125

 */

   126

static CommandCost ReplaceVehicle(Vehicle **w, byte flags, Money total_cost)

   127

{

   128

	CommandCost cost;

   129

	CommandCost sell_value;

   130

	Vehicle *old_v = *w;

   131

	const Player *p = GetPlayer(old_v->owner);

   132

	EngineID new_engine_type;

   133

	const UnitID cached_unitnumber = old_v->unitnumber;

   134

	bool new_front = false;

   135

	Vehicle *new_v = NULL;

   136

	char vehicle_name[32];

   137

	CargoID replacement_cargo_type;

   138

   139

	/* If the vehicle belongs to a group, check if the group is protected from the global autoreplace.

   140

	 *  If not, chek if an global auto replacement is defined */

   141

	new_engine_type = (IsValidGroupID(old_v->group_id) && GetGroup(old_v->group_id)->replace_protection) ?

   142

			INVALID_ENGINE :

   143

			EngineReplacementForPlayer(p, old_v->engine_type, ALL_GROUP);

   144

   145

	/* If we don't set new_egnine_type previously, we try to check if an autoreplacement was defined

   146

	 *  for the group and the engine_type of the vehicle */

   147

	if (new_engine_type == INVALID_ENGINE && !IsAllGroupID(old_v->group_id)) {

   148

		new_engine_type = EngineReplacementForPlayer(p, old_v->engine_type, old_v->group_id);

   149

	}

   150

   151

	if (new_engine_type == INVALID_ENGINE) new_engine_type = old_v->engine_type;

   152

   153

	replacement_cargo_type = GetNewCargoTypeForReplace(old_v, new_engine_type);

   154

   155

	/* check if we can't refit to the needed type, so no replace takes place to prevent the vehicle from altering cargo type */

   156

	if (replacement_cargo_type == CT_INVALID) return CommandCost();

   157

   158

	sell_value = DoCommand(0, old_v->index, 0, DC_QUERY_COST, GetCmdSellVeh(old_v));

   159

   160

	/* We give the player a loan of the same amount as the sell value.

   161

	 * This is needed in case he needs the income from the sale to build the new vehicle.

   162

	 * We take it back if building fails or when we really sell the old engine */

   163

	SET_EXPENSES_TYPE(EXPENSES_NEW_VEHICLES);

   164

	SubtractMoneyFromPlayer(sell_value);

   165

   166

	cost = DoCommand(old_v->tile, new_engine_type, 3, flags, GetCmdBuildVeh(old_v));

   167

	if (CmdFailed(cost)) {

   168

		SET_EXPENSES_TYPE(EXPENSES_NEW_VEHICLES);

   169

		/* Take back the money we just gave the player */

   170

		sell_value.MultiplyCost(-1);

   171

		SubtractMoneyFromPlayer(sell_value);

   172

		return cost;

   173

	}

   174

   175

	if (replacement_cargo_type != CT_NO_REFIT) {

   176

		/* add refit cost */

   177

		CommandCost refit_cost = GetRefitCost(new_engine_type);

   178

		if (old_v->type == VEH_TRAIN && IsMultiheaded(old_v)) refit_cost.AddCost(refit_cost); // pay for both ends

   179

		cost.AddCost(refit_cost);

   180

	}

   181

   182

	if (flags & DC_EXEC) {

   183

		new_v = GetVehicle(_new_vehicle_id);

   184

		*w = new_v; //we changed the vehicle, so MaybeReplaceVehicle needs to work on the new one. Now we tell it what the new one is

   185

   186

		/* refit if needed */

   187

		if (replacement_cargo_type != CT_NO_REFIT) {

   188

			if (CmdFailed(DoCommand(0, new_v->index, replacement_cargo_type, DC_EXEC, GetCmdRefitVeh(new_v)))) {

   189

				/* Being here shows a failure, which most likely is in GetNewCargoTypeForReplace() or incorrect estimation costs */

   190

				error("Autoreplace failed to refit. Replace engine %d to %d and refit to cargo %d", old_v->engine_type, new_v->engine_type, replacement_cargo_type);

   191

			}

   192

		}

   193

   194

		if (new_v->type == VEH_TRAIN && HasBit(old_v->u.rail.flags, VRF_REVERSE_DIRECTION) && !IsMultiheaded(new_v) && !(new_v->Next() != NULL && IsArticulatedPart(new_v->Next()))) {

   195

			// we are autorenewing to a single engine, so we will turn it as the old one was turned as well

   196

			SetBit(new_v->u.rail.flags, VRF_REVERSE_DIRECTION);

   197

		}

   198

   199

		if (old_v->type == VEH_TRAIN && !IsFrontEngine(old_v)) {

   200

			/* this is a railcar. We need to move the car into the train

   201

			 * We add the new engine after the old one instead of replacing it. It will give the same result anyway when we

   202

			 * sell the old engine in a moment

   203

			 */

   204

			/* Get the vehicle in front of the one we move out */

   205

			Vehicle *front = old_v->Previous();

   206

			/* If the vehicle in front is the rear end of a dualheaded engine, then we need to use the one in front of that one */

   207

			if (IsRearDualheaded(front)) front = front->Previous();

   208

			/* Now we move the old one out of the train */

   209

			DoCommand(0, (INVALID_VEHICLE << 16) | old_v->index, 0, DC_EXEC, CMD_MOVE_RAIL_VEHICLE);

   210

			/* Add the new vehicle */

   211

			DoCommand(0, (front->index << 16) | new_v->index, 1, DC_EXEC, CMD_MOVE_RAIL_VEHICLE);

   212

		} else {

   213

			// copy/clone the orders

   214

			DoCommand(0, (old_v->index << 16) | new_v->index, IsOrderListShared(old_v) ? CO_SHARE : CO_COPY, DC_EXEC, CMD_CLONE_ORDER);

   215

			new_v->cur_order_index = old_v->cur_order_index;

   216

			ChangeVehicleViewWindow(old_v, new_v);

   217

			new_v->profit_this_year = old_v->profit_this_year;

   218

			new_v->profit_last_year = old_v->profit_last_year;

   219

			new_v->service_interval = old_v->service_interval;

   220

			DoCommand(0, old_v->group_id, new_v->index, flags, CMD_ADD_VEHICLE_GROUP);

   221

			new_front = true;

   222

			new_v->unitnumber = old_v->unitnumber; // use the same unit number

   223

			new_v->dest_tile  = old_v->dest_tile;

   224

   225

			new_v->current_order = old_v->current_order;

   226

			if (old_v->type == VEH_TRAIN && GetNextVehicle(old_v) != NULL){

   227

				Vehicle *temp_v = GetNextVehicle(old_v);

   228

   229

				// move the entire train to the new engine, excluding the old engine

   230

				if (IsMultiheaded(old_v) && temp_v == old_v->u.rail.other_multiheaded_part) {

   231

					// we got front and rear of a multiheaded engine right after each other. We should work with the next in line instead

   232

					temp_v = GetNextVehicle(temp_v);

   233

				}

   234

   235

				if (temp_v != NULL) {

   236

					DoCommand(0, (new_v->index << 16) | temp_v->index, 1, DC_EXEC, CMD_MOVE_RAIL_VEHICLE);

   237

				}

   238

			}

   239

		}

   240

		/* We are done setting up the new vehicle. Now we move the cargo from the old one to the new one */

   241

		MoveVehicleCargo(new_v->type == VEH_TRAIN ? new_v->First() : new_v, old_v);

   242

   243

		// Get the name of the old vehicle if it has a custom name.

   244

		if (!IsCustomName(old_v->string_id)) {

   245

			vehicle_name[0] = '\0';

   246

		} else {

   247

			SetDParam(0, old_v->index);

   248

			GetString(vehicle_name, STR_VEHICLE_NAME, lastof(vehicle_name));

   249

		}

   250

	} else { // flags & DC_EXEC not set

   251

		CommandCost tmp_move;

   252

   253

		if (old_v->type == VEH_TRAIN && IsFrontEngine(old_v)) {

   254

			Vehicle *next_veh = GetNextUnit(old_v); // don't try to move the rear multiheaded engine or articulated parts

   255

			if (next_veh != NULL) {

   256

				/* Verify that the wagons can be placed on the engine in question.

   257

				 * This is done by building an engine, test if the wagons can be added and then sell the test engine. */

   258

				DoCommand(old_v->tile, new_engine_type, 3, DC_EXEC, GetCmdBuildVeh(old_v));

   259

				Vehicle *temp = GetVehicle(_new_vehicle_id);

   260

				tmp_move = DoCommand(0, (temp->index << 16) | next_veh->index, 1, 0, CMD_MOVE_RAIL_VEHICLE);

   261

				DoCommand(0, temp->index, 0, DC_EXEC, GetCmdSellVeh(old_v));

   262

			}

   263

		}

   264

   265

		/* Ensure that the player will not end up having negative money while autoreplacing

   266

		 * This is needed because the only other check is done after the income from selling the old vehicle is substracted from the cost */

   267

		if (CmdFailed(tmp_move) || p->player_money < (cost.GetCost() + total_cost)) {

   268

			SET_EXPENSES_TYPE(EXPENSES_NEW_VEHICLES);

   269

			/* Pay back the loan */

   270

			sell_value.MultiplyCost(-1);

   271

			SubtractMoneyFromPlayer(sell_value);

   272

			return CMD_ERROR;

   273

		}

   274

	}

   275

   276

	/* Take back the money we just gave the player just before building the vehicle

   277

	 * The player will get the same amount now that the sale actually takes place */

   278

	SET_EXPENSES_TYPE(EXPENSES_NEW_VEHICLES);

   279

	sell_value.MultiplyCost(-1);

   280

	SubtractMoneyFromPlayer(sell_value);

   281

   282

	/* sell the engine/ find out how much you get for the old engine (income is returned as negative cost) */

   283

	cost.AddCost(DoCommand(0, old_v->index, 0, flags, GetCmdSellVeh(old_v)));

   284

   285

	if (new_front) {

   286

		/* now we assign the old unitnumber to the new vehicle */

   287

		new_v->unitnumber = cached_unitnumber;

   288

	}

   289

   290

	/* Transfer the name of the old vehicle */

   291

	if ((flags & DC_EXEC) && vehicle_name[0] != '\0') {

   292

		_cmd_text = vehicle_name;

   293

		DoCommand(0, new_v->index, 0, DC_EXEC, CMD_NAME_VEHICLE);

   294

	}

   295

   296

	return cost;

   297

}

   298

   299

/** replaces a vehicle if it's set for autoreplace or is too old

   300

 * (used to be called autorenew)

   301

 * @param v The vehicle to replace

   302

 * if the vehicle is a train, v needs to be the front engine

   303

 * @param check Checks if the replace is valid. No action is done at all

   304

 * @param display_costs If set, a cost animation is shown (only if check is false)

   305

 * @return CMD_ERROR if something went wrong. Otherwise the price of the replace

   306

 */

   307

CommandCost MaybeReplaceVehicle(Vehicle *v, bool check, bool display_costs)

   308

{

   309

	Vehicle *w;

   310

	const Player *p = GetPlayer(v->owner);

   311

	byte flags = 0;

   312

	CommandCost cost, temp_cost;

   313

	bool stopped;

   314

   315

	/* Remember the length in case we need to trim train later on

   316

	 * If it's not a train, the value is unused

   317

	 * round up to the length of the tiles used for the train instead of the train length instead

   318

	 * Useful when newGRF uses custom length */

   319

	uint16 old_total_length = (v->type == VEH_TRAIN ?

   320

		(v->u.rail.cached_total_length + TILE_SIZE - 1) / TILE_SIZE * TILE_SIZE :

   321

		-1

   322

	);

   323

   324

   325

	_current_player = v->owner;

   326

   327

	assert(IsPlayerBuildableVehicleType(v));

   328

   329

	assert(v->vehstatus & VS_STOPPED); // the vehicle should have been stopped in VehicleEnteredDepotThisTick() if needed

   330

   331

	/* Remember the flag v->leave_depot_instantly because if we replace the vehicle, the vehicle holding this flag will be sold

   332

	 * If it is set, then we only stopped the vehicle to replace it (if needed) and we will need to start it again.

   333

	 * We also need to reset the flag since it should remain false except from when the vehicle enters a depot until autoreplace is handled in the same tick */

   334

	stopped = v->leave_depot_instantly;

   335

	v->leave_depot_instantly = false;

   336

   337

	for (;;) {

   338

		cost = CommandCost();

   339

		w = v;

   340

		do {

   341

			if (w->type == VEH_TRAIN && IsRearDualheaded(w)) {

   342

				/* we build the rear ends of multiheaded trains with the front ones */

   343

				continue;

   344

			}

   345

   346

			// check if the vehicle should be replaced

   347

			if (!p->engine_renew ||

   348

					w->age - w->max_age < (p->engine_renew_months * 30) || // replace if engine is too old

   349

					w->max_age == 0) { // rail cars got a max age of 0

   350

				/* If the vehicle belongs to a group, check if the group is protected from the global autoreplace.

   351

				   If not, chek if an global auto remplacement is defined */

   352

				if (IsValidGroupID(w->group_id)) {

   353

					if (!EngineHasReplacementForPlayer(p, w->engine_type, w->group_id) && (

   354

							GetGroup(w->group_id)->replace_protection ||

   355

							!EngineHasReplacementForPlayer(p, w->engine_type, ALL_GROUP))) {

   356

						continue;

   357

					}

   358

				} else if (IsDefaultGroupID(w->group_id)) {

   359

					if (!EngineHasReplacementForPlayer(p, w->engine_type, DEFAULT_GROUP) &&

   360

							!EngineHasReplacementForPlayer(p, w->engine_type, ALL_GROUP)) {

   361

						continue;

   362

					}

   363

				} else if (!EngineHasReplacementForPlayer(p, w->engine_type, ALL_GROUP)) {

   364

					continue;

   365

				}

   366

			}

   367

   368

			/* Now replace the vehicle */

   369

			temp_cost = ReplaceVehicle(&w, flags, cost.GetCost());

   370

   371

			if (CmdFailed(temp_cost)) break; // replace failed for some reason. Leave the vehicle alone

   372

   373

			if (flags & DC_EXEC &&

   374

					(w->type != VEH_TRAIN || w->u.rail.first_engine == INVALID_ENGINE)) {

   375

				/* now we bought a new engine and sold the old one. We need to fix the

   376

				 * pointers in order to avoid pointing to the old one for trains: these

   377

				 * pointers should point to the front engine and not the cars

   378

				 */

   379

				v = w;

   380

			}

   381

			cost.AddCost(temp_cost);

   382

		} while (w->type == VEH_TRAIN && (w = GetNextVehicle(w)) != NULL);

   383

   384

		if (!(flags & DC_EXEC) && (p->player_money < (cost.GetCost() + p->engine_renew_money) || cost.GetCost() == 0)) {

   385

			if (!check && p->player_money < (cost.GetCost() + p->engine_renew_money) && ( _local_player == v->owner ) && cost.GetCost() != 0) {

   386

				StringID message;

   387

				SetDParam(0, v->unitnumber);

   388

				switch (v->type) {

   389

					case VEH_TRAIN:    message = STR_TRAIN_AUTORENEW_FAILED;       break;

   390

					case VEH_ROAD:     message = STR_ROADVEHICLE_AUTORENEW_FAILED; break;

   391

					case VEH_SHIP:     message = STR_SHIP_AUTORENEW_FAILED;        break;

   392

					case VEH_AIRCRAFT: message = STR_AIRCRAFT_AUTORENEW_FAILED;    break;

   393

						// This should never happen

   394

					default: NOT_REACHED(); message = 0; break;

   395

				}

   396

   397

				AddNewsItem(message, NEWS_FLAGS(NM_SMALL, NF_VIEWPORT|NF_VEHICLE, NT_ADVICE, 0), v->index, 0);

   398

			}

   399

			if (stopped) v->vehstatus &= ~VS_STOPPED;

   400

			if (display_costs) _current_player = OWNER_NONE;

   401

			return CMD_ERROR;

   402

		}

   403

   404

		if (flags & DC_EXEC) {

   405

			break; // we are done replacing since the loop ran once with DC_EXEC

   406

		} else if (check) {

   407

			/* It's a test only and we know that we can do this

   408

			 * NOTE: payment for wagon removal is NOT included in this price */

   409

			return cost;

   410

		}

   411

		// now we redo the loop, but this time we actually do stuff since we know that we can do it

   412

		flags |= DC_EXEC;

   413

	}

   414

   415

	/* If setting is on to try not to exceed the old length of the train with the replacement */

   416

	if (v->type == VEH_TRAIN && p->renew_keep_length) {

   417

		Vehicle *temp;

   418

		w = v;

   419

   420

		while (v->u.rail.cached_total_length > old_total_length) {

   421

			// the train is too long. We will remove cars one by one from the start of the train until it's short enough

   422

			while (w != NULL && RailVehInfo(w->engine_type)->railveh_type != RAILVEH_WAGON) {

   423

				w = GetNextVehicle(w);

   424

			}

   425

			if (w == NULL) {

   426

				// we failed to make the train short enough

   427

				SetDParam(0, v->unitnumber);

   428

				AddNewsItem(STR_TRAIN_TOO_LONG_AFTER_REPLACEMENT, NEWS_FLAGS(NM_SMALL, NF_VIEWPORT|NF_VEHICLE, NT_ADVICE, 0), v->index, 0);

   429

				break;

   430

			}

   431

			temp = w;

   432

			w = GetNextVehicle(w);

   433

			DoCommand(0, (INVALID_VEHICLE << 16) | temp->index, 0, DC_EXEC, CMD_MOVE_RAIL_VEHICLE);

   434

			MoveVehicleCargo(v, temp);

   435

			cost.AddCost(DoCommand(0, temp->index, 0, DC_EXEC, CMD_SELL_RAIL_WAGON));

   436

		}

   437

	}

   438

   439

	if (stopped) v->vehstatus &= ~VS_STOPPED;

   440

	if (display_costs) {

   441

		if (IsLocalPlayer()) ShowCostOrIncomeAnimation(v->x_pos, v->y_pos, v->z_pos, cost.GetCost());

   442

		_current_player = OWNER_NONE;

   443

	}

   444

	return cost;

   445

}