Merge branch 'dev/1.1.0' into dev/3.0.0

# Conflicts:
#	api/src/main/java/com/velocitypowered/api/proxy/Player.java
#	proxy/src/main/java/com/velocitypowered/proxy/connection/client/ConnectedPlayer.java

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

@@ -7,6 +7,9 @@
 
 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.
  */
@@ -29,4 +32,13 @@ public interface PermissionSubject {
    * @return the value the permission is set to
    */
   Tristate getPermissionValue(String permission);
+
+  /**
+   * Gets the permission checker for the subject.
+   *
+   * @return subject's permission checker
+   */
+  default PermissionChecker getPermissionChecker() {
+    return permission -> getPermissionValue(permission).toAdventureTriState();
+  }
 }

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

@@ -7,6 +7,7 @@
 
 package com.velocitypowered.api.permission;
 
+import net.kyori.adventure.util.TriState;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
 /**
@@ -81,4 +82,21 @@ public enum 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();
+    }
+  }
 }

api/src/main/java/com/velocitypowered/api/proxy/Player.java

@@ -21,15 +21,22 @@ import com.velocitypowered.api.util.ModInfo;
 import java.util.List;
 import java.util.Optional;
 import java.util.UUID;
+import java.util.function.UnaryOperator;
 import net.kyori.adventure.identity.Identified;
+import net.kyori.adventure.identity.Identity;
+import net.kyori.adventure.key.Key;
+import net.kyori.adventure.key.Keyed;
 import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.event.HoverEvent;
+import net.kyori.adventure.text.event.HoverEventSource;
 import org.checkerframework.checker.nullness.qual.Nullable;
+import org.jetbrains.annotations.NotNull;
 
 /**
  * Represents a player who is connected to the proxy.
  */
 public interface Player extends CommandSource, Identified, InboundConnection,
-    ChannelMessageSource, ChannelMessageSink {
+    ChannelMessageSource, ChannelMessageSink, HoverEventSource<HoverEvent.ShowEntity>, Keyed {
 
   /**
    * Returns the player's current username.
@@ -218,4 +225,16 @@ public interface Player extends CommandSource, Identified, InboundConnection,
    */
   @Override
   boolean sendPluginMessage(ChannelIdentifier identifier, byte[] data);
+
+  @Override
+  default @NotNull Key key() {
+    return Key.key("player");
+  }
+
+  @Override
+  default @NotNull HoverEvent<HoverEvent.ShowEntity> asHoverEvent(
+          @NotNull UnaryOperator<HoverEvent.ShowEntity> op) {
+    return HoverEvent.showEntity(op.apply(HoverEvent.ShowEntity.of(this, getUniqueId(),
+            Component.text(getUsername()))));
+  }
 }