1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "rollback_interface.h"
#include <sstream>
#include "util/serialize.h"
#include "util/string.h"
#include "util/numeric.h"
#include "util/basic_macros.h"
#include "map.h"
#include "gamedef.h"
#include "nodedef.h"
#include "nodemetadata.h"
#include "exceptions.h"
#include "log.h"
#include "inventorymanager.h"
#include "inventory.h"
#include "mapblock.h"
RollbackNode::RollbackNode(Map *map, v3s16 p, IGameDef *gamedef)
{
INodeDefManager *ndef = gamedef->ndef();
MapNode n = map->getNodeNoEx(p);
name = ndef->get(n).name;
param1 = n.param1;
param2 = n.param2;
NodeMetadata *metap = map->getNodeMetadata(p);
if (metap) {
std::ostringstream os(std::ios::binary);
metap->serialize(os, 1); // FIXME: version bump??
meta = os.str();
}
}
std::string RollbackAction::toString() const
{
std::ostringstream os(std::ios::binary);
switch (type) {
case TYPE_SET_NODE:
os << "set_node " << PP(p);
os << ": (" << serializeJsonString(n_old.name);
os << ", " << itos(n_old.param1);
os << ", " << itos(n_old.param2);
os << ", " << serializeJsonString(n_old.meta);
os << ") -> (" << serializeJsonString(n_new.name);
os << ", " << itos(n_new.param1);
os << ", " << itos(n_new.param2);
os << ", " << serializeJsonString(n_new.meta);
os << ')';
case TYPE_MODIFY_INVENTORY_STACK:
os << "modify_inventory_stack (";
os << serializeJsonString(inventory_location);
os << ", " << serializeJsonString(inventory_list);
os << ", " << inventory_index;
os << ", " << (inventory_add ? "add" : "remove");
os << ", " << serializeJsonString(inventory_stack.getItemString());
os << ')';
default:
return "<unknown action>";
}
return os.str();
}
bool RollbackAction::isImportant(IGameDef *gamedef) const
{
if (type != TYPE_SET_NODE)
return true;
// If names differ, action is always important
if(n_old.name != n_new.name)
return true;
// If metadata differs, action is always important
if(n_old.meta != n_new.meta)
return true;
INodeDefManager *ndef = gamedef->ndef();
// Both are of the same name, so a single definition is needed
const ContentFeatures &def = ndef->get(n_old.name);
// If the type is flowing liquid, action is not important
if (def.liquid_type == LIQUID_FLOWING)
return false;
// Otherwise action is important
return true;
}
bool RollbackAction::getPosition(v3s16 *dst) const
{
switch (type) {
case TYPE_SET_NODE:
if (dst) *dst = p;
return true;
case TYPE_MODIFY_INVENTORY_STACK: {
InventoryLocation loc;
loc.deSerialize(inventory_location);
if (loc.type != InventoryLocation::NODEMETA) {
return false;
}
if (dst) *dst = loc.p;
return true; }
default:
return false;
}
}
bool RollbackAction::applyRevert(Map *map, InventoryManager *imgr, IGameDef *gamedef) const
{
try {
switch (type) {
case TYPE_NOTHING:
return true;
case TYPE_SET_NODE: {
INodeDefManager *ndef = gamedef->ndef();
// Make sure position is loaded from disk
map->emergeBlock(getContainerPos(p, MAP_BLOCKSIZE), false);
// Check current node
MapNode current_node = map->getNodeNoEx(p);
std::string current_name = ndef->get(current_node).name;
// If current node not the new node, it's bad
if (current_name != n_new.name) {
return false;
}
// Create rollback node
MapNode n(ndef, n_old.name, n_old.param1, n_old.param2);
// Set rollback node
try {
if (!map->addNodeWithEvent(p, n)) {
infostream << "RollbackAction::applyRevert(): "
<< "AddNodeWithEvent failed at "
<< PP(p) << " for " << n_old.name
<< std::endl;
return false;
}
if (n_old.meta.empty()) {
map->removeNodeMetadata(p);
} else {
NodeMetadata *meta = map->getNodeMetadata(p);
if (!meta) {
meta = new NodeMetadata(gamedef->idef());
if (!map->setNodeMetadata(p, meta)) {
delete meta;
infostream << "RollbackAction::applyRevert(): "
<< "setNodeMetadata failed at "
<< PP(p) << " for " << n_old.name
<< std::endl;
return false;
}
}
std::istringstream is(n_old.meta, std::ios::binary);
meta->deSerialize(is, 1); // FIXME: version bump??
}
// Inform other things that the meta data has changed
v3s16 blockpos = getContainerPos(p, MAP_BLOCKSIZE);
MapEditEvent event;
event.type = MEET_BLOCK_NODE_METADATA_CHANGED;
event.p = blockpos;
map->dispatchEvent(&event);
// Set the block to be saved
MapBlock *block = map->getBlockNoCreateNoEx(blockpos);
if (block) {
block->raiseModified(MOD_STATE_WRITE_NEEDED,
MOD_REASON_REPORT_META_CHANGE);
}
} catch (InvalidPositionException &e) {
infostream << "RollbackAction::applyRevert(): "
<< "InvalidPositionException: " << e.what()
<< std::endl;
return false;
}
// Success
return true; }
case TYPE_MODIFY_INVENTORY_STACK: {
InventoryLocation loc;
loc.deSerialize(inventory_location);
Inventory *inv = imgr->getInventory(loc);
if (!inv) {
infostream << "RollbackAction::applyRevert(): Could not get "
"inventory at " << inventory_location << std::endl;
return false;
}
InventoryList *list = inv->getList(inventory_list);
if (!list) {
infostream << "RollbackAction::applyRevert(): Could not get "
"inventory list \"" << inventory_list << "\" in "
<< inventory_location << std::endl;
return false;
}
if (list->getSize() <= inventory_index) {
infostream << "RollbackAction::applyRevert(): List index "
<< inventory_index << " too large in "
<< "inventory list \"" << inventory_list << "\" in "
<< inventory_location << std::endl;
return false;
}
// If item was added, take away item, otherwise add removed item
if (inventory_add) {
// Silently ignore different current item
if (list->getItem(inventory_index).name !=
gamedef->idef()->getAlias(inventory_stack.name))
return false;
list->takeItem(inventory_index, inventory_stack.count);
} else {
list->addItem(inventory_index, inventory_stack);
}
// Inventory was modified; send to clients
imgr->setInventoryModified(loc);
return true; }
default:
errorstream << "RollbackAction::applyRevert(): type not handled"
<< std::endl;
return false;
}
} catch(SerializationError &e) {
errorstream << "RollbackAction::applyRevert(): n_old.name=" << n_old.name
<< ", SerializationError: " << e.what() << std::endl;
}
return false;
}
|
