Merge branch 'RealBauHD-use/adventure-permission' into dev/5.0.0

api/src/main/java/com/velocitypowered/api/event/permission/PermissionsSetupEvent.java

@@ -9,9 +9,9 @@ package com.velocitypowered.api.event.permission;
 
 import com.google.common.base.Preconditions;
 import com.velocitypowered.api.event.annotation.AwaitingEvent;
-import com.velocitypowered.api.permission.PermissionFunction;
 import com.velocitypowered.api.permission.PermissionProvider;
 import com.velocitypowered.api.permission.PermissionSubject;
+import net.kyori.adventure.permission.PermissionChecker;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
 /**
@@ -44,13 +44,13 @@ public final class PermissionsSetupEvent {
   }
 
   /**
-   * Uses the provider function to obtain a {@link PermissionFunction} for the subject.
+   * Uses the provider function to obtain a {@link PermissionChecker} for the subject.
    *
    * @param subject the subject
    * @return the obtained permission function
    */
-  public PermissionFunction createFunction(PermissionSubject subject) {
-    return this.provider.createFunction(subject);
+  public PermissionChecker createChecker(PermissionSubject subject) {
+    return this.provider.createChecker(subject);
   }
 
   public PermissionProvider getProvider() {
@@ -58,7 +58,7 @@ public final class PermissionsSetupEvent {
   }
 
   /**
-   * Sets the {@link PermissionFunction} that should be used for the subject.
+   * Sets the {@link PermissionChecker} that should be used for the subject.
    *
    * <p>Specifying <code>null</code> will reset the provider to the default
    * instance given when the event was posted.</p>

api/src/main/java/com/velocitypowered/api/permission/PermissionFunction.java

@@ -1,38 +0,0 @@
-/*
- * Copyright (C) 2018-2021 Velocity Contributors
- *
- * The Velocity API is licensed under the terms of the MIT License. For more details,
- * reference the LICENSE file in the api top-level directory.
- */
-
-package com.velocitypowered.api.permission;
-
-/**
- * Function that calculates the permission settings for a given {@link PermissionSubject}.
- */
-@FunctionalInterface
-public interface PermissionFunction {
-
-  /**
-   * A permission function that always returns {@link Tristate#TRUE}.
-   */
-  PermissionFunction ALWAYS_TRUE = p -> Tristate.TRUE;
-
-  /**
-   * A permission function that always returns {@link Tristate#FALSE}.
-   */
-  PermissionFunction ALWAYS_FALSE = p -> Tristate.FALSE;
-
-  /**
-   * A permission function that always returns {@link Tristate#UNDEFINED}.
-   */
-  PermissionFunction ALWAYS_UNDEFINED = p -> Tristate.UNDEFINED;
-
-  /**
-   * Gets the subjects setting for a particular permission.
-   *
-   * @param permission the permission
-   * @return the value the permission is set to
-   */
-  Tristate getPermissionValue(String permission);
-}

api/src/main/java/com/velocitypowered/api/permission/PermissionProvider.java

@@ -7,17 +7,19 @@
 
 package com.velocitypowered.api.permission;
 
+import net.kyori.adventure.permission.PermissionChecker;
+
 /**
- * Provides {@link PermissionFunction}s for {@link PermissionSubject}s.
+ * Provides {@link PermissionChecker}s for {@link PermissionSubject}s.
  */
 @FunctionalInterface
 public interface PermissionProvider {
 
   /**
-   * Creates a {@link PermissionFunction} for the subject.
+   * Creates a {@link PermissionChecker} for the subject.
    *
    * @param subject the subject
    * @return the function
    */
-  PermissionFunction createFunction(PermissionSubject subject);
+  PermissionChecker createChecker(PermissionSubject subject);
 }

api/src/main/java/com/velocitypowered/api/permission/PermissionSubject.java

@@ -8,6 +8,7 @@
 package com.velocitypowered.api.permission;
 
 import net.kyori.adventure.permission.PermissionChecker;
+import net.kyori.adventure.util.TriState;
 
 /**
  * Represents a object that has a set of queryable permissions.
@@ -21,7 +22,7 @@ public interface PermissionSubject {
    * @return whether or not the subject has the permission
    */
   default boolean hasPermission(String permission) {
-    return getPermissionValue(permission).asBoolean();
+    return this.getPermissionChecker().test(permission);
   }
 
   /**
@@ -30,14 +31,14 @@ public interface PermissionSubject {
    * @param permission the permission
    * @return the value the permission is set to
    */
-  Tristate getPermissionValue(String permission);
+  default TriState getPermissionValue(String permission) {
+    return this.getPermissionChecker().value(permission);
+  }
 
   /**
    * Gets the permission checker for the subject.
    *
    * @return subject's permission checker
    */
-  default PermissionChecker getPermissionChecker() {
-    return permission -> getPermissionValue(permission).toAdventureTriState();
-  }
+  PermissionChecker getPermissionChecker();
 }

api/src/main/java/com/velocitypowered/api/permission/Tristate.java

@@ -1,118 +0,0 @@
-/*
- * Copyright (C) 2018-2023 Velocity Contributors
- *
- * The Velocity API is licensed under the terms of the MIT License. For more details,
- * reference the LICENSE file in the api top-level directory.
- */
-
-package com.velocitypowered.api.permission;
-
-import java.util.Optional;
-import net.kyori.adventure.util.TriState;
-import org.checkerframework.checker.nullness.qual.Nullable;
-
-/**
- * Represents three different states of a setting.
- *
- * <p>Possible values:</p>
- * <p></p>
- * <ul>
- * <li>{@link #TRUE} - a positive setting</li>
- * <li>{@link #FALSE} - a negative (negated) setting</li>
- * <li>{@link #UNDEFINED} - a non-existent setting</li>
- * </ul>
- */
-public enum Tristate {
-
-  /**
-   * A value indicating a positive setting.
-   */
-  TRUE(true),
-
-  /**
-   * A value indicating a negative (negated) setting.
-   */
-  FALSE(false),
-
-  /**
-   * A value indicating a non-existent setting.
-   */
-  UNDEFINED(false);
-
-  /**
-   * Returns a {@link Tristate} from a boolean.
-   *
-   * @param val the boolean value
-   * @return {@link #TRUE} or {@link #FALSE}, if the value is <code>true</code> or
-   *     <code>false</code>, respectively.
-   */
-  public static Tristate fromBoolean(boolean val) {
-    return val ? TRUE : FALSE;
-  }
-
-  /**
-   * Returns a {@link Tristate} from a nullable boolean.
-   *
-   * <p>Unlike {@link #fromBoolean(boolean)}, this method returns {@link #UNDEFINED}
-   * if the value is null.</p>
-   *
-   * @param val the boolean value
-   * @return {@link #UNDEFINED}, {@link #TRUE} or {@link #FALSE}, if the value is <code>null</code>,
-   *     <code>true</code> or <code>false</code>, respectively.
-   */
-  public static Tristate fromNullableBoolean(@Nullable Boolean val) {
-    if (val == null) {
-      return UNDEFINED;
-    }
-    return val ? TRUE : FALSE;
-  }
-
-  /**
-   * Returns a {@link Tristate} from an {@link Optional}.
-   *
-   * <p>Unlike {@link #fromBoolean(boolean)}, this method returns {@link #UNDEFINED}
-   * if the value is empty.</p>
-   *
-   * @param val the optional boolean value
-   * @return {@link #UNDEFINED}, {@link #TRUE} or {@link #FALSE}, if the value is empty,
-   *     <code>true</code> or <code>false</code>, respectively.
-   */
-  public static Tristate fromOptionalBoolean(Optional<Boolean> val) {
-    return val.map(Tristate::fromBoolean).orElse(UNDEFINED);
-  }
-
-
-  private final boolean booleanValue;
-
-  Tristate(boolean booleanValue) {
-    this.booleanValue = booleanValue;
-  }
-
-  /**
-   * Returns the value of the Tristate as a boolean.
-   *
-   * <p>A value of {@link #UNDEFINED} converts to false.</p>
-   *
-   * @return a boolean representation of the Tristate.
-   */
-  public boolean asBoolean() {
-    return this.booleanValue;
-  }
-
-  /**
-   * Returns the equivalent Adventure {@link TriState}.
-   *
-   * @return equivalent Adventure TriState
-   */
-  public TriState toAdventureTriState() {
-    if (this == Tristate.TRUE) {
-      return TriState.TRUE;
-    } else if (this == Tristate.UNDEFINED) {
-      return TriState.NOT_SET;
-    } else if (this == Tristate.FALSE) {
-      return TriState.FALSE;
-    } else {
-      throw new IllegalArgumentException();
-    }
-  }
-}

proxy/src/main/java/com/velocitypowered/proxy/command/builtin/GlistCommand.java

@@ -28,7 +28,6 @@ import com.mojang.brigadier.tree.ArgumentCommandNode;
 import com.mojang.brigadier.tree.LiteralCommandNode;
 import com.velocitypowered.api.command.BrigadierCommand;
 import com.velocitypowered.api.command.CommandSource;
-import com.velocitypowered.api.permission.Tristate;
 import com.velocitypowered.api.proxy.Player;
 import com.velocitypowered.api.proxy.ProxyServer;
 import com.velocitypowered.api.proxy.server.RegisteredServer;
@@ -39,6 +38,7 @@ import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.TextComponent;
 import net.kyori.adventure.text.TranslatableComponent;
 import net.kyori.adventure.text.format.NamedTextColor;
+import net.kyori.adventure.util.TriState;
 
 /**
  * Implements the Velocity default {@code /glist} command.
@@ -60,7 +60,7 @@ public class GlistCommand {
     LiteralCommandNode<CommandSource> totalNode = LiteralArgumentBuilder
         .<CommandSource>literal("glist")
         .requires(source ->
-            source.getPermissionValue("velocity.command.glist") == Tristate.TRUE)
+            source.getPermissionValue("velocity.command.glist") == TriState.TRUE)
         .executes(this::totalCount)
         .build();
     ArgumentCommandNode<CommandSource, String> serverNode = RequiredArgumentBuilder

proxy/src/main/java/com/velocitypowered/proxy/command/builtin/ServerCommand.java

@@ -22,7 +22,6 @@ import static net.kyori.adventure.text.event.HoverEvent.showText;
 import com.google.common.collect.ImmutableList;
 import com.velocitypowered.api.command.CommandSource;
 import com.velocitypowered.api.command.SimpleCommand;
-import com.velocitypowered.api.permission.Tristate;
 import com.velocitypowered.api.proxy.Player;
 import com.velocitypowered.api.proxy.ProxyServer;
 import com.velocitypowered.api.proxy.ServerConnection;
@@ -37,6 +36,7 @@ import net.kyori.adventure.text.TextComponent;
 import net.kyori.adventure.text.TranslatableComponent;
 import net.kyori.adventure.text.event.ClickEvent;
 import net.kyori.adventure.text.format.NamedTextColor;
+import net.kyori.adventure.util.TriState;
 
 /**
  * Implements Velocity's {@code /server} command.
@@ -161,6 +161,6 @@ public class ServerCommand implements SimpleCommand {
 
   @Override
   public boolean hasPermission(final SimpleCommand.Invocation invocation) {
-    return invocation.source().getPermissionValue("velocity.command.server") != Tristate.FALSE;
+    return invocation.source().getPermissionValue("velocity.command.server") != TriState.FALSE;
   }
 }

proxy/src/main/java/com/velocitypowered/proxy/command/builtin/VelocityCommand.java

@@ -24,7 +24,6 @@ import com.google.gson.JsonArray;
 import com.google.gson.JsonObject;
 import com.velocitypowered.api.command.CommandSource;
 import com.velocitypowered.api.command.SimpleCommand;
-import com.velocitypowered.api.permission.Tristate;
 import com.velocitypowered.api.plugin.PluginContainer;
 import com.velocitypowered.api.plugin.PluginDescription;
 import com.velocitypowered.api.proxy.ProxyServer;
@@ -59,6 +58,7 @@ import net.kyori.adventure.text.event.HoverEvent;
 import net.kyori.adventure.text.format.NamedTextColor;
 import net.kyori.adventure.text.format.TextColor;
 import net.kyori.adventure.text.format.TextDecoration;
+import net.kyori.adventure.util.TriState;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.checkerframework.checker.nullness.qual.NonNull;
@@ -200,7 +200,7 @@ public class VelocityCommand implements SimpleCommand {
 
     @Override
     public boolean hasPermission(final CommandSource source, final String @NonNull [] args) {
-      return source.getPermissionValue("velocity.command.reload") == Tristate.TRUE;
+      return source.getPermissionValue("velocity.command.reload") == TriState.TRUE;
     }
   }
 
@@ -255,7 +255,7 @@ public class VelocityCommand implements SimpleCommand {
 
     @Override
     public boolean hasPermission(final CommandSource source, final String @NonNull [] args) {
-      return source.getPermissionValue("velocity.command.info") != Tristate.FALSE;
+      return source.getPermissionValue("velocity.command.info") != TriState.FALSE;
     }
   }
 
@@ -336,7 +336,7 @@ public class VelocityCommand implements SimpleCommand {
 
     @Override
     public boolean hasPermission(final CommandSource source, final String @NonNull [] args) {
-      return source.getPermissionValue("velocity.command.plugins") == Tristate.TRUE;
+      return source.getPermissionValue("velocity.command.plugins") == TriState.TRUE;
     }
   }
 
@@ -405,7 +405,7 @@ public class VelocityCommand implements SimpleCommand {
 
     @Override
     public boolean hasPermission(final CommandSource source, final String @NonNull [] args) {
-      return source.getPermissionValue("velocity.command.plugins") == Tristate.TRUE;
+      return source.getPermissionValue("velocity.command.plugins") == TriState.TRUE;
     }
   }
 
@@ -481,7 +481,7 @@ public class VelocityCommand implements SimpleCommand {
 
     @Override
     public boolean hasPermission(CommandSource source, String @NonNull [] args) {
-      return source.getPermissionValue("velocity.command.heap") == Tristate.TRUE;
+      return source.getPermissionValue("velocity.command.heap") == TriState.TRUE;
     }
 
   }

proxy/src/main/java/com/velocitypowered/proxy/connection/client/AuthSessionHandler.java

@@ -27,7 +27,6 @@ import com.velocitypowered.api.event.permission.PermissionsSetupEvent;
 import com.velocitypowered.api.event.player.GameProfileRequestEvent;
 import com.velocitypowered.api.event.player.PlayerChooseInitialServerEvent;
 import com.velocitypowered.api.network.ProtocolVersion;
-import com.velocitypowered.api.permission.PermissionFunction;
 import com.velocitypowered.api.proxy.crypto.IdentifiedKey;
 import com.velocitypowered.api.proxy.server.RegisteredServer;
 import com.velocitypowered.api.util.GameProfile;
@@ -47,6 +46,7 @@ import java.util.Objects;
 import java.util.Optional;
 import java.util.UUID;
 import java.util.concurrent.CompletableFuture;
+import net.kyori.adventure.permission.PermissionChecker;
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.format.NamedTextColor;
 import org.apache.logging.log4j.LogManager;
@@ -111,14 +111,16 @@ public class AuthSessionHandler implements MinecraftSessionHandler {
           .thenAcceptAsync(event -> {
             if (!mcConnection.isClosed()) {
               // wait for permissions to load, then set the players permission function
-              final PermissionFunction function = event.createFunction(player);
-              if (function == null) {
-                logger.error("A plugin permission provider {} provided an invalid permission "
-                        + "function for player {}. This is a bug in the plugin, not in "
-                        + "Velocity. Falling back to the default permission function.",
-                    event.getProvider().getClass().getName(), player.getUsername());
+              final PermissionChecker checker = event.createChecker(player);
+              if (checker == null) {
+                logger.error(
+                    "A plugin permission provider {} provided an invalid permission function"
+                        + " for player {}. This is a bug in the plugin, not in Velocity. Falling"
+                        + " back to the default permission function.",
+                    event.getProvider().getClass().getName(),
+                    player.getUsername());
               } else {
-                player.setPermissionFunction(function);
+                player.setPermissionChecker(checker);
               }
               startLoginCompletion(player);
             }

proxy/src/main/java/com/velocitypowered/proxy/connection/client/ConnectedPlayer.java

@@ -35,9 +35,7 @@ import com.velocitypowered.api.event.player.PlayerResourcePackStatusEvent;
 import com.velocitypowered.api.event.player.PlayerSettingsChangedEvent;
 import com.velocitypowered.api.event.player.ServerPreConnectEvent;
 import com.velocitypowered.api.network.ProtocolVersion;
-import com.velocitypowered.api.permission.PermissionFunction;
 import com.velocitypowered.api.permission.PermissionProvider;
-import com.velocitypowered.api.permission.Tristate;
 import com.velocitypowered.api.proxy.ConnectionRequestBuilder;
 import com.velocitypowered.api.proxy.Player;
 import com.velocitypowered.api.proxy.ServerConnection;
@@ -79,7 +77,6 @@ import com.velocitypowered.proxy.tablist.VelocityTabList;
 import com.velocitypowered.proxy.tablist.VelocityTabListLegacy;
 import com.velocitypowered.proxy.util.ClosestLocaleMatcher;
 import com.velocitypowered.proxy.util.DurationUtils;
-import com.velocitypowered.proxy.util.TranslatableMapper;
 import io.netty.buffer.ByteBufUtil;
 import io.netty.buffer.Unpooled;
 import java.net.InetSocketAddress;
@@ -102,6 +99,9 @@ import net.kyori.adventure.platform.facet.FacetPointers;
 import net.kyori.adventure.platform.facet.FacetPointers.Type;
 import net.kyori.adventure.pointer.Pointers;
 import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.KeybindComponent;
+import net.kyori.adventure.text.TranslatableComponent;
+import net.kyori.adventure.text.flattener.ComponentFlattener;
 import net.kyori.adventure.text.format.NamedTextColor;
 import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer;
 import net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer;
@@ -109,6 +109,7 @@ import net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer;
 import net.kyori.adventure.title.Title.Times;
 import net.kyori.adventure.title.TitlePart;
 import net.kyori.adventure.translation.GlobalTranslator;
+import net.kyori.adventure.util.TriState;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
@@ -122,10 +123,15 @@ import org.jetbrains.annotations.NotNull;
 public class ConnectedPlayer implements MinecraftConnectionAssociation, Player, KeyIdentifiable,
     VelocityInboundConnection {
 
-  private static final int MAX_PLUGIN_CHANNELS = 1024;
   private static final PlainTextComponentSerializer PASS_THRU_TRANSLATE =
-      PlainTextComponentSerializer.builder().flattener(TranslatableMapper.FLATTENER).build();
-  static final PermissionProvider DEFAULT_PERMISSIONS = s -> PermissionFunction.ALWAYS_UNDEFINED;
+      PlainTextComponentSerializer.builder()
+          .flattener(ComponentFlattener.basic().toBuilder()
+              .mapper(KeybindComponent.class, c -> "")
+              .mapper(TranslatableComponent.class, TranslatableComponent::key)
+              .build())
+          .build();
+  static final PermissionProvider DEFAULT_PERMISSIONS =
+      s -> PermissionChecker.always(TriState.NOT_SET);
 
   private static final Logger logger = LogManager.getLogger(ConnectedPlayer.class);
 
@@ -136,7 +142,7 @@ public class ConnectedPlayer implements MinecraftConnectionAssociation, Player,
   private final MinecraftConnection connection;
   private final @Nullable InetSocketAddress virtualHost;
   private GameProfile profile;
-  private PermissionFunction permissionFunction;
+  private PermissionChecker permissionChecker;
   private int tryIndex = 0;
   private long ping = -1;
   private final boolean onlineMode;
@@ -155,13 +161,14 @@ public class ConnectedPlayer implements MinecraftConnectionAssociation, Player,
   private final Queue<ResourcePackInfo> outstandingResourcePacks = new ArrayDeque<>();
   private @Nullable ResourcePackInfo pendingResourcePack;
   private @Nullable ResourcePackInfo appliedResourcePack;
-  private final @NotNull Pointers pointers =
-      Player.super.pointers().toBuilder().withDynamic(Identity.UUID, this::getUniqueId)
+  private final @NotNull Pointers pointers = Player.super.pointers().toBuilder()
+      .withDynamic(Identity.UUID, this::getUniqueId)
       .withDynamic(Identity.NAME, this::getUsername)
       .withDynamic(Identity.DISPLAY_NAME, () -> Component.text(this.getUsername()))
       .withDynamic(Identity.LOCALE, this::getEffectiveLocale)
-          .withStatic(PermissionChecker.POINTER, getPermissionChecker())
-          .withStatic(FacetPointers.TYPE, Type.PLAYER).build();
+      .withDynamic(PermissionChecker.POINTER, () -> this.permissionChecker)
+      .withStatic(FacetPointers.TYPE, Type.PLAYER)
+      .build();
   private @Nullable String clientBrand;
   private @Nullable Locale effectiveLocale;
   private @Nullable IdentifiedKey playerKey;
@@ -176,7 +183,7 @@ public class ConnectedPlayer implements MinecraftConnectionAssociation, Player,
     this.profile = profile;
     this.connection = connection;
     this.virtualHost = virtualHost;
-    this.permissionFunction = PermissionFunction.ALWAYS_UNDEFINED;
+    this.permissionChecker = PermissionChecker.always(TriState.NOT_SET);
     this.connectionPhase = connection.getType().getInitialClientPhase();
     this.onlineMode = onlineMode;
 
@@ -318,8 +325,8 @@ public class ConnectedPlayer implements MinecraftConnectionAssociation, Player,
     return Optional.ofNullable(virtualHost);
   }
 
-  void setPermissionFunction(PermissionFunction permissionFunction) {
-    this.permissionFunction = permissionFunction;
+  void setPermissionChecker(PermissionChecker permissionChecker) {
+    this.permissionChecker = permissionChecker;
   }
 
   @Override
@@ -913,8 +920,8 @@ public class ConnectedPlayer implements MinecraftConnectionAssociation, Player,
   }
 
   @Override
-  public Tristate getPermissionValue(String permission) {
-    return permissionFunction.getPermissionValue(permission);
+  public PermissionChecker getPermissionChecker() {
+    return this.permissionChecker;
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/console/VelocityConsole.java

@@ -17,11 +17,7 @@
 
 package com.velocitypowered.proxy.console;
 
-import static com.velocitypowered.api.permission.PermissionFunction.ALWAYS_TRUE;
-
 import com.velocitypowered.api.event.permission.PermissionsSetupEvent;
-import com.velocitypowered.api.permission.PermissionFunction;
-import com.velocitypowered.api.permission.Tristate;
 import com.velocitypowered.api.proxy.ConsoleCommandSource;
 import com.velocitypowered.proxy.VelocityServer;
 import com.velocitypowered.proxy.util.ClosestLocaleMatcher;
@@ -36,6 +32,7 @@ import net.kyori.adventure.pointer.Pointers;
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.format.NamedTextColor;
 import net.kyori.adventure.text.logger.slf4j.ComponentLogger;
+import net.kyori.adventure.util.TriState;
 import net.minecrell.terminalconsole.SimpleTerminalConsole;
 import org.apache.logging.log4j.Level;
 import org.apache.logging.log4j.LogManager;
@@ -58,7 +55,7 @@ public final class VelocityConsole extends SimpleTerminalConsole implements Cons
           .logger(VelocityConsole.class);
 
   private final VelocityServer server;
-  private PermissionFunction permissionFunction = ALWAYS_TRUE;
+  private PermissionChecker permissionChecker = PermissionChecker.always(TriState.TRUE);
   private final @NotNull Pointers pointers = ConsoleCommandSource.super.pointers().toBuilder()
       .withDynamic(PermissionChecker.POINTER, this::getPermissionChecker)
       .withDynamic(Identity.LOCALE, () -> ClosestLocaleMatcher.INSTANCE
@@ -77,8 +74,8 @@ public final class VelocityConsole extends SimpleTerminalConsole implements Cons
   }
 
   @Override
-  public @NonNull Tristate getPermissionValue(@NonNull String permission) {
-    return this.permissionFunction.getPermissionValue(permission);
+  public PermissionChecker getPermissionChecker() {
+    return this.permissionChecker;
   }
 
   /**
@@ -93,16 +90,17 @@ public final class VelocityConsole extends SimpleTerminalConsole implements Cons
    * Sets up permissions for the console.
    */
   public void setupPermissions() {
-    PermissionsSetupEvent event = new PermissionsSetupEvent(this, s -> ALWAYS_TRUE);
+    PermissionsSetupEvent event = new PermissionsSetupEvent(
+        this, s -> PermissionChecker.always(TriState.TRUE));
     // we can safely block here, this is before any listeners fire
-    this.permissionFunction = this.server.getEventManager().fire(event).join().createFunction(this);
-    if (this.permissionFunction == null) {
+    this.permissionChecker = this.server.getEventManager().fire(event).join().createChecker(this);
+    if (this.permissionChecker == null) {
       logger.error(
           "A plugin permission provider {} provided an invalid permission function"
               + " for the console. This is a bug in the plugin, not in Velocity. Falling"
               + " back to the default permission function.",
           event.getProvider().getClass().getName());
-      this.permissionFunction = ALWAYS_TRUE;
+      this.permissionChecker = PermissionChecker.always(TriState.TRUE);
     }
   }
 

proxy/src/test/java/com/velocitypowered/proxy/command/CommandTestSuite.java

@@ -25,12 +25,12 @@ import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
 import com.velocitypowered.api.command.CommandSource;
-import com.velocitypowered.api.permission.Tristate;
 import com.velocitypowered.api.proxy.Player;
 import com.velocitypowered.proxy.event.MockEventManager;
 import com.velocitypowered.proxy.event.VelocityEventManager;
 import java.util.Arrays;
 import java.util.Collection;
+import net.kyori.adventure.util.TriState;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.BeforeEach;
 
@@ -66,7 +66,7 @@ abstract class CommandTestSuite {
 
   final void assertPlayerSuggestions(final String input, final String... expectedSuggestions) {
     final var player = mock(Player.class);
-    when(player.getPermissionValue(any())).thenReturn(Tristate.UNDEFINED);
+    when(player.getPermissionValue(any())).thenReturn(TriState.NOT_SET);
     final var actual = manager.offerSuggestions(player, input).join();
     assertEquals(Arrays.asList(expectedSuggestions), actual);
   }

proxy/src/test/java/com/velocitypowered/proxy/command/MockCommandSource.java

@@ -18,7 +18,8 @@
 package com.velocitypowered.proxy.command;
 
 import com.velocitypowered.api.command.CommandSource;
-import com.velocitypowered.api.permission.Tristate;
+import net.kyori.adventure.permission.PermissionChecker;
+import net.kyori.adventure.util.TriState;
 
 /**
  * A fake {@link CommandSource}.
@@ -28,7 +29,7 @@ public class MockCommandSource implements CommandSource {
   public static final CommandSource INSTANCE = new MockCommandSource();
 
   @Override
-  public Tristate getPermissionValue(final String permission) {
-    return Tristate.UNDEFINED;
+  public PermissionChecker getPermissionChecker() {
+    return PermissionChecker.always(TriState.NOT_SET);
   }
 }