core/src/ru/deadsoftware/cavedroid/game/GameSaver.java

   1 package ru.deadsoftware.cavedroid.game;
   2
   3 import com.badlogic.gdx.Gdx;
   4 import com.badlogic.gdx.files.FileHandle;
   5 import ru.deadsoftware.cavedroid.MainConfig;
   6 import ru.deadsoftware.cavedroid.game.mobs.MobsController;
   7 import ru.deadsoftware.cavedroid.game.model.block.Block;
   8 import ru.deadsoftware.cavedroid.game.objects.DropController;
   9 import ru.deadsoftware.cavedroid.game.world.GameWorld;
  10
  11 import javax.annotation.CheckForNull;
  12 import java.io.*;
  13 import java.nio.ByteBuffer;
  14 import java.util.HashMap;
  15 import java.util.Map;
  16
  17 public class GameSaver {
  18
  19     private static final String TAG = "GameSaver";
  20
  21     public static class Data {
  22         @CheckForNull
  23         private MobsController mMobsController;
  24         @CheckForNull
  25         private DropController mDropController;
  26         @CheckForNull
  27         private Block[][] mForeMap, mBackMap;
  28
  29         public Data(MobsController mobsController, DropController dropController, Block[][] foreMap, Block[][] backMap) {
  30             mMobsController = mobsController;
  31             mDropController = dropController;
  32             mForeMap = foreMap;
  33             mBackMap = backMap;
  34         }
  35
  36         public MobsController retrieveMobsController() {
  37             assert mMobsController != null;
  38             MobsController mobsController = mMobsController;
  39             mMobsController = null;
  40             return mobsController;
  41         }
  42
  43         public DropController retrieveDropController() {
  44             assert mDropController != null;
  45             DropController dropController = mDropController;
  46             mDropController = null;
  47             return dropController;
  48         }
  49
  50         public Block[][] retrieveForeMap() {
  51             assert mForeMap != null;
  52             Block[][] foreMap = mForeMap;
  53             mForeMap = null;
  54             return foreMap;
  55         }
  56
  57         public Block[][] retrieveBackMap() {
  58             assert mBackMap != null;
  59             Block[][] backMap = mBackMap;
  60             mBackMap = null;
  61             return backMap;
  62         }
  63
  64         public boolean isEmpty() {
  65             return mMobsController == null && mDropController == null && mForeMap == null && mBackMap == null;
  66         }
  67     }
  68
  69     private static final int SAVE_VERSION = 1;
  70
  71     private static byte[] intToBytes(int i) {
  72         return ByteBuffer.allocate(4).putInt(i).array();
  73     }
  74
  75     private static Map<String, Integer> buildBlocksDictionary(Block[][] foreMap, Block[][] backMap) {
  76         final HashMap<String, Integer> dict = new HashMap<>();
  77
  78         int id = 0;
  79         for (int i = 0; i < foreMap.length; i++) {
  80             for (int j = 0; j < foreMap[i].length; j++) {
  81                 for (int k = 0; k < 2; k++) {
  82                     final Block block = k == 0 ? foreMap[i][j] : backMap[i][j];
  83                     final String key = block.getParams().getKey();
  84                     if (!dict.containsKey(key)) {
  85                         dict.put(key, id++);
  86                     }
  87                 }
  88             }
  89         }
  90
  91         return dict;
  92     }
  93
  94     private static void saveDict(FileHandle file, Map<String, Integer> dict) {
  95         final String[] arr = new String[dict.size()];
  96
  97         for (Map.Entry<String, Integer> entry : dict.entrySet()) {
  98             arr[entry.getValue()] = entry.getKey();
  99         }
 100
 101         final StringBuilder builder = new StringBuilder();
 102         for (String key : arr) {
 103             builder.append(key);
 104             builder.append('\n');
 105         }
 106
 107         file.writeString(builder.toString(), false);
 108     }
 109
 110     private static String[] loadDict(FileHandle file) {
 111         return file.readString().split("\n");
 112     }
 113
 114     private static void saveMap(FileHandle file, Block[][] map, Map<String, Integer> dict) throws IOException {
 115         int run, block;
 116         int width = map.length;
 117         int height = map[0].length;
 118
 119         BufferedOutputStream out = new BufferedOutputStream(file.write(false));
 120
 121         out.write(SAVE_VERSION);
 122         out.write(intToBytes(width));
 123         out.write(intToBytes(height));
 124
 125         for (int y = 0; y < height; y++) {
 126             block = dict.get(map[0][y].getParams().getKey());
 127             run = 0;
 128             for (Block[] blocks : map) {
 129                 int newValue = dict.get(blocks[y].getParams().getKey());
 130                 if (run >= 0xFF || newValue != block) {
 131                     out.write(run);
 132                     out.write(block);
 133                     run = 0;
 134                     block = dict.get(blocks[y].getParams().getKey());
 135                 }
 136                 run++;
 137             }
 138             out.write(run);
 139             out.write(block);
 140         }
 141
 142         out.flush();
 143         out.close();
 144     }
 145
 146     private static Block[][] loadMap(GameItemsHolder gameItemsHolder, FileHandle file, String[] dict) throws Exception {
 147         Block[][] map;
 148         int version, width, height;
 149         int run, block;
 150
 151         DataInputStream in = new DataInputStream(file.read());
 152
 153         version = in.readByte();
 154
 155         if (SAVE_VERSION == version) {
 156             width = in.readInt();
 157             height = in.readInt();
 158             map = new Block[width][height];
 159             for (int y = 0; y < height; y++) {
 160                 for (int x = 0; x < width; x += run) {
 161                     run = in.readUnsignedByte();
 162                     block = in.readUnsignedByte();
 163                     for (int i = x; i < x + run; i++) {
 164                         map[i][y] = gameItemsHolder.getBlock(dict[block]);
 165                     }
 166                 }
 167             }
 168         } else {
 169             throw new Exception("version mismatch");
 170         }
 171
 172         in.close();
 173         return map;
 174     }
 175
 176     @CheckForNull
 177     public static Data load(MainConfig mainConfig, GameItemsHolder gameItemsHolder) {
 178         String folder = mainConfig.getGameFolder();
 179         FileHandle file = Gdx.files.absolute(folder + "/saves/game.sav");
 180
 181         try {
 182             ObjectInputStream in = new ObjectInputStream(file.read());
 183             int version = in.readInt();
 184             DropController dropController;
 185             MobsController mobsController;
 186
 187             if (SAVE_VERSION == version) {
 188                 dropController = (DropController) in.readObject();
 189                 mobsController = (MobsController) in.readObject();
 190             } else {
 191                 throw new Exception("version mismatch");
 192             }
 193
 194             in.close();
 195
 196             final String[] dict = loadDict(Gdx.files.absolute(mainConfig.getGameFolder() + "/saves/dict"));
 197             Block[][] foreMap = loadMap(gameItemsHolder, Gdx.files.absolute(mainConfig.getGameFolder() + "/saves/foremap.sav"), dict);
 198             Block[][] backMap = loadMap(gameItemsHolder, Gdx.files.absolute(mainConfig.getGameFolder() + "/saves/backmap.sav"), dict);
 199
 200             if (dropController == null || mobsController == null) {
 201                 throw new Exception("couldn't load");
 202             }
 203
 204             return new Data(mobsController, dropController, foreMap, backMap);
 205         } catch (Exception e) {
 206             Gdx.app.error("GameSaver", e.getMessage());
 207         }
 208
 209         return null;
 210     }
 211
 212     public static void save(MainConfig mainConfig,
 213                             DropController dropController,
 214                             MobsController mobsController,
 215                             GameWorld gameWorld) {
 216         String folder = mainConfig.getGameFolder();
 217         FileHandle file = Gdx.files.absolute(folder + "/saves/");
 218         file.mkdirs();
 219         file = Gdx.files.absolute(folder + "/saves/game.sav");
 220
 221         final Block[][] foreMap, backMap;
 222         foreMap = gameWorld.getFullForeMap();
 223         backMap = gameWorld.getFullBackMap();
 224
 225         final Map<String, Integer> dict = buildBlocksDictionary(foreMap, backMap);
 226
 227         try {
 228             ObjectOutputStream out = new ObjectOutputStream(file.write(false));
 229             out.writeInt(SAVE_VERSION);
 230             out.writeObject(dropController);
 231             out.writeObject(mobsController);
 232             out.close();
 233
 234             saveDict(Gdx.files.absolute(folder + "/saves/dict"), dict);
 235             saveMap(Gdx.files.absolute(folder + "/saves/foremap.sav"), gameWorld.getFullForeMap(), dict);
 236             saveMap(Gdx.files.absolute(folder + "/saves/backmap.sav"), gameWorld.getFullBackMap(), dict);
 237         } catch (Exception e) {
 238             e.printStackTrace();
 239         }
 240     }
 241
 242     public static boolean exists(MainConfig mainConfig) {
 243         String folder = mainConfig.getGameFolder();
 244         return (Gdx.files.absolute(folder + "/saves/game.sav").exists() &&
 245                 Gdx.files.absolute(folder + "/saves/foremap.sav").exists() &&
 246                 Gdx.files.absolute(folder + "/saves/backmap.sav").exists());
 247     }
 248 }