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| 1 | +/* |
| 2 | + * Copyright 2019-present CloudNetService team & contributors |
| 3 | + * |
| 4 | + * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | + * you may not use this file except in compliance with the License. |
| 6 | + * You may obtain a copy of the License at |
| 7 | + * |
| 8 | + * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | + * |
| 10 | + * Unless required by applicable law or agreed to in writing, software |
| 11 | + * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | + * See the License for the specific language governing permissions and |
| 14 | + * limitations under the License. |
| 15 | + */ |
| 16 | + |
| 17 | +package eu.cloudnetservice.modules.npc.impl.platform.bukkit.util; |
| 18 | + |
| 19 | +import com.github.juliarn.npclib.api.protocol.PlatformPacketAdapter; |
| 20 | +import com.github.juliarn.npclib.bukkit.protocol.BukkitProtocolAdapter; |
| 21 | +import com.github.retrooper.packetevents.manager.server.ServerVersion; |
| 22 | +import com.github.retrooper.packetevents.util.PEVersion; |
| 23 | +import eu.cloudnetservice.utils.base.StringUtil; |
| 24 | +import java.lang.invoke.MethodHandle; |
| 25 | +import java.lang.invoke.MethodHandles; |
| 26 | +import java.lang.invoke.MethodType; |
| 27 | +import java.util.function.Supplier; |
| 28 | +import lombok.NonNull; |
| 29 | +import org.bukkit.Bukkit; |
| 30 | +import org.bukkit.Server; |
| 31 | +import org.bukkit.World; |
| 32 | +import org.bukkit.entity.Player; |
| 33 | +import org.bukkit.inventory.ItemStack; |
| 34 | +import org.bukkit.plugin.Plugin; |
| 35 | + |
| 36 | +public final class BukkitPacketAdapterUtil { |
| 37 | + |
| 38 | + private static final String NPC_PACKET_ADAPTER = System.getProperty("cloudnet.npcs.packet-adapter"); |
| 39 | + |
| 40 | + private static final MethodHandle SERVER_GET_BUKKIT_VERSION; |
| 41 | + |
| 42 | + static { |
| 43 | + MethodHandle handle = null; |
| 44 | + try { |
| 45 | + handle = MethodHandles.publicLookup().findVirtual(Server.class, "getBukkitVersion", MethodType.methodType(String.class)); |
| 46 | + } catch (Throwable _) { |
| 47 | + } |
| 48 | + SERVER_GET_BUKKIT_VERSION = handle; |
| 49 | + } |
| 50 | + |
| 51 | + private static final Supplier<PlatformPacketAdapter<World, Player, ItemStack, Plugin>> RESOLVED = StableValue.supplier( |
| 52 | + BukkitPacketAdapterUtil::resolveAdapter); |
| 53 | + |
| 54 | + private BukkitPacketAdapterUtil() { |
| 55 | + throw new UnsupportedOperationException(); |
| 56 | + } |
| 57 | + |
| 58 | + public static @NonNull PlatformPacketAdapter<World, Player, ItemStack, Plugin> resolve() { |
| 59 | + return RESOLVED.get(); |
| 60 | + } |
| 61 | + |
| 62 | + private static @NonNull PlatformPacketAdapter<World, Player, ItemStack, Plugin> resolveAdapter() { |
| 63 | + if (NPC_PACKET_ADAPTER == null) { |
| 64 | + return evaluateAdapter(); |
| 65 | + } |
| 66 | + |
| 67 | + return switch (StringUtil.toLower(NPC_PACKET_ADAPTER)) { |
| 68 | + case "protocollib" -> BukkitProtocolAdapter.protocolLib(); |
| 69 | + case "packetevents" -> BukkitProtocolAdapter.packetEvents(); |
| 70 | + default -> evaluateAdapter(); |
| 71 | + }; |
| 72 | + } |
| 73 | + |
| 74 | + private static @NonNull PlatformPacketAdapter<World, Player, ItemStack, Plugin> evaluateAdapter() { |
| 75 | + try { |
| 76 | + var bukkitVersion = resolveMinecraftVersion(); |
| 77 | + var versionStart = bukkitVersion.indexOf('-'); |
| 78 | + var parsedVersion = PEVersion.fromString(versionStart >= 0 ? bukkitVersion.substring(0, versionStart) : bukkitVersion); |
| 79 | + var latestPEVersion = PEVersion.fromString(ServerVersion.getLatest().getReleaseName()); |
| 80 | + if (parsedVersion.isNewerThan(latestPEVersion)) { |
| 81 | + return BukkitProtocolAdapter.protocolLib(); |
| 82 | + } |
| 83 | + |
| 84 | + return BukkitProtocolAdapter.packetEvents(); |
| 85 | + } catch (Throwable _) { |
| 86 | + return BukkitProtocolAdapter.protocolLib(); |
| 87 | + } |
| 88 | + } |
| 89 | + |
| 90 | + private static @NonNull String resolveMinecraftVersion() { |
| 91 | + try { |
| 92 | + if (SERVER_GET_BUKKIT_VERSION != null) { |
| 93 | + return (String) SERVER_GET_BUKKIT_VERSION.invoke(Bukkit.getServer()); |
| 94 | + } |
| 95 | + } catch (Throwable _) { |
| 96 | + } |
| 97 | + return Bukkit.getBukkitVersion(); |
| 98 | + } |
| 99 | +} |
| 100 | + |
| 101 | + |
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