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| 1 | +package dev.compactmods.machines.command; |
| 2 | + |
| 3 | +import java.io.IOException; |
| 4 | +import java.io.InputStreamReader; |
| 5 | +import java.nio.file.Files; |
| 6 | +import java.time.ZonedDateTime; |
| 7 | +import java.time.format.DateTimeFormatter; |
| 8 | +import java.util.concurrent.Executor; |
| 9 | +import com.google.common.collect.ImmutableList; |
| 10 | +import com.google.gson.Gson; |
| 11 | +import com.google.gson.JsonObject; |
| 12 | +import com.mojang.brigadier.builder.ArgumentBuilder; |
| 13 | +import com.mojang.brigadier.context.CommandContext; |
| 14 | +import com.mojang.brigadier.exceptions.CommandSyntaxException; |
| 15 | +import com.mojang.serialization.JsonOps; |
| 16 | +import com.mojang.serialization.Lifecycle; |
| 17 | +import dev.compactmods.machines.CompactMachines; |
| 18 | +import dev.compactmods.machines.core.Registration; |
| 19 | +import dev.compactmods.machines.util.TranslationUtil; |
| 20 | +import net.minecraft.ChatFormatting; |
| 21 | +import net.minecraft.commands.CommandSourceStack; |
| 22 | +import net.minecraft.commands.Commands; |
| 23 | +import net.minecraft.core.Registry; |
| 24 | +import net.minecraft.resources.RegistryReadOps; |
| 25 | +import net.minecraft.resources.RegistryResourceAccess; |
| 26 | +import net.minecraft.resources.ResourceKey; |
| 27 | +import net.minecraft.resources.ResourceLocation; |
| 28 | +import net.minecraft.server.MinecraftServer; |
| 29 | +import net.minecraft.server.level.ServerLevel; |
| 30 | +import net.minecraft.server.level.progress.ChunkProgressListener; |
| 31 | +import net.minecraft.server.packs.resources.Resource; |
| 32 | +import net.minecraft.world.level.Level; |
| 33 | +import net.minecraft.world.level.border.BorderChangeListener; |
| 34 | +import net.minecraft.world.level.dimension.LevelStem; |
| 35 | +import net.minecraft.world.level.levelgen.WorldGenSettings; |
| 36 | +import net.minecraft.world.level.storage.DerivedLevelData; |
| 37 | +import net.minecraft.world.level.storage.LevelResource; |
| 38 | +import net.minecraft.world.level.storage.LevelStorageSource; |
| 39 | +import net.minecraft.world.level.storage.WorldData; |
| 40 | +import net.minecraftforge.common.MinecraftForge; |
| 41 | +import net.minecraftforge.event.world.WorldEvent; |
| 42 | +import net.minecraftforge.fml.loading.FMLEnvironment; |
| 43 | + |
| 44 | +public class ReaddDimensionCommand { |
| 45 | + public static ArgumentBuilder<CommandSourceStack, ?> register() { |
| 46 | + return Commands.literal("registerdim") |
| 47 | + .requires(cs -> cs.hasPermission(Commands.LEVEL_GAMEMASTERS)) |
| 48 | + .executes(ReaddDimensionCommand::exec); |
| 49 | + } |
| 50 | + |
| 51 | + private static int exec(CommandContext<CommandSourceStack> ctx) throws CommandSyntaxException { |
| 52 | + var src = ctx.getSource(); |
| 53 | + var serv = src.getServer(); |
| 54 | + |
| 55 | + var compactLevel = serv.getLevel(Registration.COMPACT_DIMENSION); |
| 56 | + if (compactLevel == null) { |
| 57 | + src.sendSuccess(TranslationUtil.command("level_not_found").withStyle(ChatFormatting.RED), false); |
| 58 | + |
| 59 | + createAndRegisterWorldAndDimension(serv); |
| 60 | + } else { |
| 61 | + src.sendSuccess(TranslationUtil.command("level_registered").withStyle(ChatFormatting.DARK_GREEN), false); |
| 62 | + } |
| 63 | + |
| 64 | + return 0; |
| 65 | + } |
| 66 | + |
| 67 | + @SuppressWarnings("deprecation") // because we call the forge internal method server#markWorldsDirty |
| 68 | + private static void createAndRegisterWorldAndDimension(final MinecraftServer server) { |
| 69 | + final var map = server.forgeGetWorldMap(); |
| 70 | + |
| 71 | + // get everything we need to create the dimension and the level |
| 72 | + final ServerLevel overworld = server.getLevel(Level.OVERWORLD); |
| 73 | + |
| 74 | + // dimension keys have a 1:1 relationship with level keys, they have the same IDs as well |
| 75 | + final ResourceKey<LevelStem> dimensionKey = ResourceKey.create(Registry.LEVEL_STEM_REGISTRY, Registration.COMPACT_DIMENSION.location()); |
| 76 | + |
| 77 | + final var serverResources = server.getResourceManager(); |
| 78 | + |
| 79 | + Resource dimFile = null; |
| 80 | + try { |
| 81 | + dimFile = serverResources.getResource(new ResourceLocation(CompactMachines.MOD_ID, "dimension/compact_world.json")); |
| 82 | + } catch (IOException e) { |
| 83 | + CompactMachines.LOGGER.error("Failed to register dimension from datapack settings.", e); |
| 84 | + } |
| 85 | + |
| 86 | + if (dimFile == null) { |
| 87 | + return; |
| 88 | + } |
| 89 | + |
| 90 | + // only back up level.dat in production |
| 91 | + if (FMLEnvironment.production && !doLevelFileBackup(server)) return; |
| 92 | + |
| 93 | + var g = new Gson(); |
| 94 | + final var jsonDim = g.fromJson(new InputStreamReader(dimFile.getInputStream()), JsonObject.class); |
| 95 | + |
| 96 | + var reg = server.registryAccess(); |
| 97 | + var cmDimType = reg.registryOrThrow(Registry.DIMENSION_TYPE_REGISTRY) |
| 98 | + .get(Registration.COMPACT_DIMENSION_DIM_TYPE); |
| 99 | + |
| 100 | + // TODO - Figure out how to either re-read dimension info from data structure, or kick the level.dat into behaving |
| 101 | + var ops = RegistryReadOps.create(JsonOps.INSTANCE, serverResources, reg); |
| 102 | + |
| 103 | + var resourceAccess = RegistryResourceAccess.forResourceManager(serverResources); |
| 104 | + var dims = resourceAccess.listResources(Registry.DIMENSION_REGISTRY); |
| 105 | + |
| 106 | + var cmDim = dims.stream() |
| 107 | + .filter(d -> d.location().equals(Registration.COMPACT_DIMENSION.location())) |
| 108 | + .findFirst(); |
| 109 | + |
| 110 | + cmDim.ifPresent(lev -> { |
| 111 | + var parsed = resourceAccess.parseElement(ops, Registry.LEVEL_STEM_REGISTRY, dimensionKey, LevelStem.CODEC); |
| 112 | + |
| 113 | + var stem = parsed.orElseThrow() |
| 114 | + .result().orElseThrow() |
| 115 | + .value(); |
| 116 | + |
| 117 | + // the int in create() here is radius of chunks to watch, 11 is what the server uses when it initializes worlds |
| 118 | + final ChunkProgressListener chunkProgressListener = server.progressListenerFactory.create(11); |
| 119 | + final Executor executor = server.executor; |
| 120 | + final LevelStorageSource.LevelStorageAccess anvilConverter = server.storageSource; |
| 121 | + final WorldData worldData = server.getWorldData(); |
| 122 | + final WorldGenSettings worldGenSettings = worldData.worldGenSettings(); |
| 123 | + final DerivedLevelData derivedLevelData = new DerivedLevelData(worldData, worldData.overworldData()); |
| 124 | + |
| 125 | + // now we have everything we need to create the dimension and the level |
| 126 | + // this is the same order server init creates levels: |
| 127 | + // the dimensions are already registered when levels are created, we'll do that first |
| 128 | + // then instantiate level, add border listener, add to map, fire world load event |
| 129 | + |
| 130 | + // register the actual dimension |
| 131 | + worldGenSettings.dimensions().register(dimensionKey, stem, Lifecycle.experimental()); |
| 132 | + |
| 133 | + // create the world instance |
| 134 | + final ServerLevel newWorld = new ServerLevel( |
| 135 | + server, |
| 136 | + executor, |
| 137 | + anvilConverter, |
| 138 | + derivedLevelData, |
| 139 | + Registration.COMPACT_DIMENSION, |
| 140 | + cmDimType, |
| 141 | + chunkProgressListener, |
| 142 | + stem.generator(), |
| 143 | + worldGenSettings.isDebug(), |
| 144 | + net.minecraft.world.level.biome.BiomeManager.obfuscateSeed(worldGenSettings.seed()), |
| 145 | + ImmutableList.of(), // "special spawn list" |
| 146 | + false // "tick time", true for overworld, always false for nether, end, and json dimensions |
| 147 | + ); |
| 148 | + |
| 149 | + /* |
| 150 | + add world border listener, for parity with json dimensions |
| 151 | + the vanilla behaviour is that world borders exist in every dimension simultaneously with the same size and position |
| 152 | + these border listeners are automatically added to the overworld as worlds are loaded, so we should do that here too |
| 153 | + TODO if world-specific world borders are ever added, change it here too |
| 154 | + */ |
| 155 | + overworld.getWorldBorder().addListener(new BorderChangeListener.DelegateBorderChangeListener(newWorld.getWorldBorder())); |
| 156 | + |
| 157 | + // register level |
| 158 | + map.put(Registration.COMPACT_DIMENSION, newWorld); |
| 159 | + |
| 160 | + // update forge's world cache so the new level can be ticked |
| 161 | + server.markWorldsDirty(); |
| 162 | + |
| 163 | + // fire world load event |
| 164 | + MinecraftForge.EVENT_BUS.post(new WorldEvent.Load(newWorld)); |
| 165 | + }); |
| 166 | + } |
| 167 | + |
| 168 | + private static boolean doLevelFileBackup(MinecraftServer server) { |
| 169 | + var levelRoot = server.getWorldPath(LevelResource.ROOT); |
| 170 | + var levelFile = server.getWorldPath(LevelResource.LEVEL_DATA_FILE); |
| 171 | + |
| 172 | + var formatter = DateTimeFormatter.ofPattern("'cm4-level-'yyyyMMdd-HHmmss'.dat'"); |
| 173 | + var timestamp = formatter.format(ZonedDateTime.now()); |
| 174 | + try { |
| 175 | + Files.copy(levelFile, levelRoot.resolve(timestamp)); |
| 176 | + } catch (IOException e) { |
| 177 | + CompactMachines.LOGGER.error("Failed to backup level.dat file before modification; canceling register dim attempt."); |
| 178 | + return false; |
| 179 | + } |
| 180 | + |
| 181 | + return true; |
| 182 | + } |
| 183 | +} |
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