Initial commit of adventure-adapted Velocity API.

api/src/main/java/com/velocitypowered/api/command/CommandSource.java

@@ -1,17 +1,20 @@
 package com.velocitypowered.api.command;
 
 import com.velocitypowered.api.permission.PermissionSubject;
-import net.kyori.text.Component;
+import com.velocitypowered.api.proxy.ProxyAudience;
+import net.kyori.adventure.text.Component;
 
 /**
  * Represents something that can be used to run a {@link Command}.
  */
-public interface CommandSource extends PermissionSubject {
+public interface CommandSource extends PermissionSubject, ProxyAudience {
 
   /**
    * Sends the specified {@code component} to the invoker.
    *
    * @param component the text component to send
+   * @deprecated Use {@link #sendMessage(Component)} instead
    */
-  void sendMessage(Component component);
+  @Deprecated
+  void sendMessage(net.kyori.text.Component component);
 }

api/src/main/java/com/velocitypowered/api/event/ResultedEvent.java

@@ -1,9 +1,10 @@
 package com.velocitypowered.api.event;
 
 import com.google.common.base.Preconditions;
+import com.velocitypowered.api.util.AdventureCompat;
 import java.util.Optional;
-import net.kyori.text.Component;
-import net.kyori.text.serializer.plain.PlainComponentSerializer;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.serializer.plain.PlainComponentSerializer;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
 /**
@@ -92,7 +93,11 @@ public interface ResultedEvent<R extends ResultedEvent.Result> {
       return status;
     }
 
-    public Optional<Component> getReason() {
+    public Optional<net.kyori.text.Component> getReason() {
+      return Optional.ofNullable(reason).map(AdventureCompat::asOriginalTextComponent);
+    }
+
+    public Optional<Component> getReasonComponent() {
       return Optional.ofNullable(reason);
     }
 
@@ -115,5 +120,11 @@ public interface ResultedEvent<R extends ResultedEvent.Result> {
       Preconditions.checkNotNull(reason, "reason");
       return new ComponentResult(false, reason);
     }
+
+    @Deprecated
+    public static ComponentResult denied(net.kyori.text.Component reason) {
+      Preconditions.checkNotNull(reason, "reason");
+      return new ComponentResult(false, AdventureCompat.asAdventureComponent(reason));
+    }
   }
 }

api/src/main/java/com/velocitypowered/api/event/connection/PreLoginEvent.java

@@ -3,8 +3,8 @@ package com.velocitypowered.api.event.connection;
 import com.google.common.base.Preconditions;
 import com.velocitypowered.api.event.ResultedEvent;
 import com.velocitypowered.api.proxy.InboundConnection;
+import com.velocitypowered.api.util.AdventureCompat;
 import java.util.Optional;
-import net.kyori.text.Component;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -71,9 +71,10 @@ public final class PreLoginEvent implements ResultedEvent<PreLoginEvent.PreLogin
         Result.FORCE_OFFLINE, null);
 
     private final Result result;
-    private final @Nullable Component reason;
+    private final net.kyori.adventure.text.Component reason;
 
-    private PreLoginComponentResult(Result result, @Nullable Component reason) {
+    private PreLoginComponentResult(Result result,
+        net.kyori.adventure.text.@Nullable Component reason) {
       this.result = result;
       this.reason = reason;
     }
@@ -83,7 +84,12 @@ public final class PreLoginEvent implements ResultedEvent<PreLoginEvent.PreLogin
       return result != Result.DISALLOWED;
     }
 
-    public Optional<Component> getReason() {
+    @Deprecated
+    public Optional<net.kyori.text.Component> getReason() {
+      return Optional.ofNullable(reason).map(AdventureCompat::asOriginalTextComponent);
+    }
+
+    public Optional<net.kyori.adventure.text.Component> getReasonComponent() {
       return Optional.ofNullable(reason);
     }
 
@@ -143,9 +149,23 @@ public final class PreLoginEvent implements ResultedEvent<PreLoginEvent.PreLogin
      * Denies the login with the specified reason.
      *
      * @param reason the reason for disallowing the connection
+     * @deprecated Use {@link #denied(net.kyori.adventure.text.Component)}
      * @return a new result
      */
-    public static PreLoginComponentResult denied(Component reason) {
+    @Deprecated
+    public static PreLoginComponentResult denied(net.kyori.text.Component reason) {
+      Preconditions.checkNotNull(reason, "reason");
+      return new PreLoginComponentResult(Result.DISALLOWED,
+          AdventureCompat.asAdventureComponent(reason));
+    }
+
+    /**
+     * Denies the login with the specified reason.
+     *
+     * @param reason the reason for disallowing the connection
+     * @return a new result
+     */
+    public static PreLoginComponentResult denied(net.kyori.adventure.text.Component reason) {
       Preconditions.checkNotNull(reason, "reason");
       return new PreLoginComponentResult(Result.DISALLOWED, reason);
     }

api/src/main/java/com/velocitypowered/api/event/player/KickedFromServerEvent.java

@@ -4,6 +4,7 @@ import com.google.common.base.Preconditions;
 import com.velocitypowered.api.event.ResultedEvent;
 import com.velocitypowered.api.proxy.Player;
 import com.velocitypowered.api.proxy.server.RegisteredServer;
+import com.velocitypowered.api.util.AdventureCompat;
 import java.util.Optional;
 import net.kyori.text.Component;
 import org.checkerframework.checker.nullness.qual.NonNull;
@@ -20,7 +21,7 @@ public final class KickedFromServerEvent implements
 
   private final Player player;
   private final RegisteredServer server;
-  private final @Nullable Component originalReason;
+  private final net.kyori.adventure.text.Component originalReason;
   private final boolean duringServerConnect;
   private ServerKickResult result;
 
@@ -34,11 +35,7 @@ public final class KickedFromServerEvent implements
    */
   public KickedFromServerEvent(Player player, RegisteredServer server,
       @Nullable Component originalReason, boolean duringServerConnect, Component fancyReason) {
-    this.player = Preconditions.checkNotNull(player, "player");
-    this.server = Preconditions.checkNotNull(server, "server");
-    this.originalReason = originalReason;
-    this.duringServerConnect = duringServerConnect;
-    this.result = new Notify(fancyReason);
+    this(player, server, originalReason, duringServerConnect, Notify.create(fancyReason));
   }
 
   /**
@@ -53,6 +50,21 @@ public final class KickedFromServerEvent implements
       RegisteredServer server,
       @Nullable Component originalReason, boolean duringServerConnect,
       ServerKickResult result) {
+    this(player, server, AdventureCompat.asAdventureComponent(originalReason), duringServerConnect,
+        result);
+  }
+
+  /**
+   * Creates a {@code KickedFromServerEvent} instance.
+   * @param player the player affected
+   * @param server the server the player disconnected from
+   * @param originalReason the reason for being kicked, optional
+   * @param duringServerConnect whether or not the player was kicked during the connection process
+   * @param result the initial result
+   */
+  public KickedFromServerEvent(Player player, RegisteredServer server,
+      net.kyori.adventure.text.Component originalReason,
+      boolean duringServerConnect, ServerKickResult result) {
     this.player = Preconditions.checkNotNull(player, "player");
     this.server = Preconditions.checkNotNull(server, "server");
     this.originalReason = originalReason;
@@ -78,7 +90,17 @@ public final class KickedFromServerEvent implements
     return server;
   }
 
+  /**
+   * Gets the reason the server kicked the player from the server.
+   * @return the server kicked the player from the server
+   * @deprecated Use {@link #getServerKickReason()} instead
+   */
+  @Deprecated
   public Optional<Component> getOriginalReason() {
+    return Optional.ofNullable(originalReason).map(AdventureCompat::asOriginalTextComponent);
+  }
+
+  public Optional<net.kyori.adventure.text.Component> getServerKickReason() {
     return Optional.ofNullable(originalReason);
   }
 
@@ -115,9 +137,9 @@ public final class KickedFromServerEvent implements
    */
   public static final class DisconnectPlayer implements ServerKickResult {
 
-    private final Component component;
+    private final net.kyori.adventure.text.Component component;
 
-    private DisconnectPlayer(Component component) {
+    private DisconnectPlayer(net.kyori.adventure.text.Component component) {
       this.component = Preconditions.checkNotNull(component, "component");
     }
 
@@ -126,7 +148,12 @@ public final class KickedFromServerEvent implements
       return true;
     }
 
+    @Deprecated
     public Component getReason() {
+      return AdventureCompat.asOriginalTextComponent(component);
+    }
+
+    public net.kyori.adventure.text.Component getReasonComponent() {
       return component;
     }
 
@@ -135,8 +162,20 @@ public final class KickedFromServerEvent implements
      *
      * @param reason the reason to use when disconnecting the player
      * @return the disconnect result
+     * @deprecated Use {@link #create(net.kyori.adventure.text.Component)} instead
      */
+    @Deprecated
     public static DisconnectPlayer create(Component reason) {
+      return new DisconnectPlayer(AdventureCompat.asAdventureComponent(reason));
+    }
+
+    /**
+     * Creates a new {@link DisconnectPlayer} with the specified reason.
+     *
+     * @param reason the reason to use when disconnecting the player
+     * @return the disconnect result
+     */
+    public static DisconnectPlayer create(net.kyori.adventure.text.Component reason) {
       return new DisconnectPlayer(reason);
     }
   }
@@ -147,10 +186,10 @@ public final class KickedFromServerEvent implements
    */
   public static final class RedirectPlayer implements ServerKickResult {
 
-    private final Component message;
+    private final net.kyori.adventure.text.Component message;
     private final RegisteredServer server;
 
-    private RedirectPlayer(RegisteredServer server, @Nullable Component message) {
+    private RedirectPlayer(RegisteredServer server, net.kyori.adventure.text.Component message) {
       this.server = Preconditions.checkNotNull(server, "server");
       this.message = message;
     }
@@ -164,8 +203,12 @@ public final class KickedFromServerEvent implements
       return server;
     }
 
-    @Nullable
+    @Deprecated
     public Component getMessage() {
+      return AdventureCompat.asOriginalTextComponent(message);
+    }
+
+    public net.kyori.adventure.text.Component getMessageComponent() {
       return message;
     }
 
@@ -174,13 +217,29 @@ public final class KickedFromServerEvent implements
      *
      * @param server the server to send the player to
      * @return the redirect result
+     * @deprecated Use {@link #create(RegisteredServer, net.kyori.adventure.text.Component)}
      */
-    public static RedirectPlayer create(RegisteredServer server, @Nullable Component message) {
+    @Deprecated
+    public static RedirectPlayer create(RegisteredServer server, net.kyori.text.Component message) {
+      if (message == null) {
+        return new RedirectPlayer(server, null);
+      }
+      return new RedirectPlayer(server, AdventureCompat.asAdventureComponent(message));
+    }
+
+    /**
+     * Creates a new redirect result to forward the player to the specified {@code server}.
+     *
+     * @param server the server to send the player to
+     * @return the redirect result
+     */
+    public static RedirectPlayer create(RegisteredServer server,
+        net.kyori.adventure.text.Component message) {
       return new RedirectPlayer(server, message);
     }
 
     public static ServerKickResult create(RegisteredServer server) {
-      return create(server, null);
+      return new RedirectPlayer(server, null);
     }
   }
 
@@ -191,9 +250,10 @@ public final class KickedFromServerEvent implements
    */
   public static final class Notify implements ServerKickResult {
 
-    private final Component message;
+    private final net.kyori.adventure.text.Component message;
 
-    private Notify(Component message) {
+    @Deprecated
+    private Notify(net.kyori.adventure.text.Component message) {
       this.message = Preconditions.checkNotNull(message, "message");
     }
 
@@ -202,7 +262,13 @@ public final class KickedFromServerEvent implements
       return false;
     }
 
+    @Deprecated
     public Component getMessage() {
+      return AdventureCompat.asOriginalTextComponent(message);
+    }
+
+    @Deprecated
+    public net.kyori.adventure.text.Component getMessageComponent() {
       return message;
     }
 
@@ -211,8 +277,20 @@ public final class KickedFromServerEvent implements
      *
      * @param message the server to send the player to
      * @return the redirect result
+     * @deprecated Use {@link #create(net.kyori.adventure.text.Component)} instead
      */
+    @Deprecated
     public static Notify create(Component message) {
+      return new Notify(AdventureCompat.asAdventureComponent(message));
+    }
+
+    /**
+     * Notifies the player with the specified message but does nothing else.
+     *
+     * @param message the server to send the player to
+     * @return the redirect result
+     */
+    public static Notify create(net.kyori.adventure.text.Component message) {
       return new Notify(message);
     }
   }

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

@@ -67,9 +67,18 @@ public interface ConnectionRequestBuilder {
      * Returns an (optional) textual reason for the failure to connect to the server.
      *
      * @return the reason why the user could not connect to the server
+     * @deprecated Use {@link #getReasonComponent()} instead
      */
+    @Deprecated
     Optional<Component> getReason();
 
+    /**
+     * Returns an (optional) textual reason for the failure to connect to the server.
+     *
+     * @return the reason why the user could not connect to the server
+     */
+    Optional<net.kyori.adventure.text.Component> getReasonComponent();
+
     /**
      * Returns the server we actually tried to connect to.
      *

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

@@ -14,7 +14,7 @@ import com.velocitypowered.api.util.title.Title;
 import java.util.List;
 import java.util.Optional;
 import java.util.UUID;
-import net.kyori.text.Component;
+import net.kyori.adventure.text.Component;
 
 /**
  * Represents a player who is connected to the proxy.
@@ -76,9 +76,11 @@ public interface Player extends CommandSource, InboundConnection, ChannelMessage
    * Sends a chat message to the player's client.
    *
    * @param component the chat message to send
+   * @deprecated Use {@link #sendMessage(net.kyori.adventure.text.Component)}
    */
+  @Deprecated
   @Override
-  default void sendMessage(Component component) {
+  default void sendMessage(net.kyori.text.Component component) {
     sendMessage(component, MessagePosition.CHAT);
   }
 
@@ -87,8 +89,11 @@ public interface Player extends CommandSource, InboundConnection, ChannelMessage
    *
    * @param component the chat message to send
    * @param position the position for the message
+   * @deprecated Use @deprecated Use {@link #sendMessage(net.kyori.adventure.text.Component)} or
+   *             {@link #sendActionBar(net.kyori.adventure.text.Component)}
    */
-  void sendMessage(Component component, MessagePosition position);
+  @Deprecated
+  void sendMessage(net.kyori.text.Component component, MessagePosition position);
 
   /**
    * Creates a new connection request so that the player can connect to another server.
@@ -127,7 +132,7 @@ public interface Player extends CommandSource, InboundConnection, ChannelMessage
    * @deprecated Use {@link TabList#setHeaderAndFooter(Component, Component)}.
    */
   @Deprecated
-  void setHeaderAndFooter(Component header, Component footer);
+  void setHeaderAndFooter(net.kyori.text.Component header, net.kyori.text.Component footer);
 
   /**
    * Clears the tab list header and footer for the player.
@@ -149,14 +154,26 @@ public interface Player extends CommandSource, InboundConnection, ChannelMessage
    * other {@link Player} methods will become undefined.
    *
    * @param reason component with the reason
+   * @deprecated Use {@link #disconnect(Component)} instead
    */
-  void disconnect(Component reason);
+  @Deprecated
+  void disconnect(net.kyori.text.Component reason);
+
+  /**
+   * Disconnects the player with the specified reason. Once this method is called, further calls to
+   * other {@link Player} methods will become undefined.
+   *
+   * @param reason component with the reason
+   */
+  void disconnect(net.kyori.adventure.text.Component reason);
 
   /**
    * Sends the specified title to the client.
    *
    * @param title the title to send
+   * @deprecated Use {@link #showTitle(net.kyori.adventure.title.Title)} and {@link #resetTitle()}
    */
+  @Deprecated
   void sendTitle(Title title);
 
   /**

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

@@ -0,0 +1,71 @@
+package com.velocitypowered.api.proxy;
+
+import net.kyori.adventure.audience.Audience;
+import net.kyori.adventure.bossbar.BossBar;
+import net.kyori.adventure.inventory.Book;
+import net.kyori.adventure.sound.Sound;
+import net.kyori.adventure.sound.SoundStop;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.title.Title;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Indicates an {@link Audience} that is on the proxy. This interface contains no-op default methods
+ * that are used to bridge compatibility issues with the new adventure API. This interface will go
+ * away in Velocity 2.0.0.
+ */
+public interface ProxyAudience extends Audience {
+
+  @Override
+  void sendMessage(@NonNull Component message);
+
+  @Override
+  default void sendActionBar(@NonNull Component message) {
+
+  }
+
+  @Override
+  default void showTitle(@NonNull Title title) {
+
+  }
+
+  @Override
+  default void clearTitle() {
+
+  }
+
+  @Override
+  default void resetTitle() {
+
+  }
+
+  @Override
+  default void showBossBar(@NonNull BossBar bar) {
+
+  }
+
+  @Override
+  default void hideBossBar(@NonNull BossBar bar) {
+
+  }
+
+  @Override
+  default void playSound(@NonNull Sound sound) {
+
+  }
+
+  @Override
+  default void playSound(@NonNull Sound sound, double x, double y, double z) {
+
+  }
+
+  @Override
+  default void stopSound(@NonNull SoundStop stop) {
+
+  }
+
+  @Override
+  default void openBook(@NonNull Book book) {
+
+  }
+}

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

@@ -17,13 +17,13 @@ import java.net.InetSocketAddress;
 import java.util.Collection;
 import java.util.Optional;
 import java.util.UUID;
-import net.kyori.text.Component;
+import net.kyori.adventure.text.Component;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
  * Provides an interface to a Minecraft server proxy.
  */
-public interface ProxyServer {
+public interface ProxyServer extends ProxyAudience {
 
   /**
    * Retrieves the player currently connected to this proxy by their Minecraft username. The search
@@ -46,8 +46,10 @@ public interface ProxyServer {
    * Broadcasts a message to all players currently online.
    *
    * @param component the message to send
+   * @deprecated Use {@link #sendMessage(Component)} instead
    */
-  void broadcast(Component component);
+  @Deprecated
+  void broadcast(net.kyori.text.Component component);
 
   /**
    * Retrieves all players currently connected to this proxy. This call may or may not be a snapshot
@@ -186,8 +188,10 @@ public interface ProxyServer {
    * @param overlay boss bar overlay
    * @param progress boss bar progress
    * @return a completely new and fresh boss bar
+   * @deprecated Use {@link net.kyori.adventure.bossbar.BossBar} instead
    */
+  @Deprecated
   @NonNull
-  BossBar createBossBar(@NonNull Component title, @NonNull BossBarColor color,
+  BossBar createBossBar(net.kyori.text.Component title, @NonNull BossBarColor color,
       @NonNull BossBarOverlay overlay, float progress);
 }

api/src/main/java/com/velocitypowered/api/proxy/config/ProxyConfig.java

@@ -5,7 +5,6 @@ import com.velocitypowered.api.util.Favicon;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
-import net.kyori.text.Component;
 
 /**
  * Exposes certain proxy configuration information that plugins may use.
@@ -44,8 +43,17 @@ public interface ProxyConfig {
    * Get the MOTD component shown in the tab list.
    *
    * @return the motd component
+   * @deprecated Use {@link #getMotd()} instead
    */
-  Component getMotdComponent();
+  @Deprecated
+  net.kyori.text.Component getMotdComponent();
+
+  /**
+   * Get the MOTD component shown in the tab list.
+   *
+   * @return the motd component
+   */
+  net.kyori.adventure.text.Component getMotd();
 
   /**
    * Get the maximum players shown in the tab list.

api/src/main/java/com/velocitypowered/api/proxy/player/TabList.java

@@ -5,7 +5,7 @@ import com.velocitypowered.api.util.GameProfile;
 import java.util.Collection;
 import java.util.Optional;
 import java.util.UUID;
-import net.kyori.text.Component;
+import net.kyori.adventure.text.Component;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
 /**
@@ -13,6 +13,16 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  */
 public interface TabList {
 
+  /**
+   * Sets the tab list header and footer for the player.
+   *
+   * @param header the header component
+   * @param footer the footer component
+   * @deprecated Use {@link #setHeaderAndFooter(Component, Component)} instead
+   */
+  @Deprecated
+  void setHeaderAndFooter(net.kyori.text.Component header, net.kyori.text.Component footer);
+
   /**
    * Sets the tab list header and footer for the player.
    *

api/src/main/java/com/velocitypowered/api/proxy/player/TabListEntry.java

@@ -1,8 +1,9 @@
 package com.velocitypowered.api.proxy.player;
 
+import com.velocitypowered.api.util.AdventureCompat;
 import com.velocitypowered.api.util.GameProfile;
 import java.util.Optional;
-import net.kyori.text.Component;
+import net.kyori.adventure.text.Component;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
 /**
@@ -27,12 +28,35 @@ public interface TabListEntry {
   GameProfile getProfile();
 
   /**
-   * Returns {@link Optional} text {@link Component}, which if present is the text displayed for
-   * {@code this} entry in the {@link TabList}, otherwise {@link GameProfile#getName()} is shown.
+   * Returns {@link Optional} text {@link net.kyori.text.Component}, which if present is the text
+   * displayed for {@code this} entry in the {@link TabList}, otherwise
+   * {@link GameProfile#getName()} is shown.
+   *
+   * @return {@link Optional} text {@link net.kyori.text.Component} of name displayed in the tab
+   *         list
    *
-   * @return {@link Optional} text {@link Component} of name displayed in the tab list
    */
-  Optional<Component> getDisplayName();
+  Optional<net.kyori.text.Component> getDisplayName();
+
+  /**
+   * Returns {@link Optional} text {@link net.kyori.text.Component}, which if present is the text
+   * displayed for {@code this} entry in the {@link TabList}, otherwise
+   * {@link GameProfile#getName()} is shown.
+   *
+   * @return {@link Optional} text {@link net.kyori.text.Component} of name displayed in the tab
+   *         list
+   */
+  Optional<Component> getDisplayNameComponent();
+
+  /**
+   * Sets the text {@link net.kyori.text.Component} to be displayed for {@code this}
+   * {@link TabListEntry}. If {@code null}, {@link GameProfile#getName()} will be shown.
+   *
+   * @param displayName to show in the {@link TabList} for {@code this} entry
+   * @return {@code this}, for chaining
+   * @deprecated Use {@link #setDisplayName(Component)} instead
+   */
+  TabListEntry setDisplayName(net.kyori.text.Component displayName);
 
   /**
    * Sets the text {@link Component} to be displayed for {@code this} {@link TabListEntry}. If
@@ -149,6 +173,19 @@ public interface TabListEntry {
      * @param displayName to set
      * @return {@code this}, for chaining
      * @see TabListEntry#getDisplayName()
+     * @deprecated Use {@link #displayName(Component)} instead
+     */
+    @Deprecated
+    public Builder displayName(net.kyori.text.Component displayName) {
+      return displayName(AdventureCompat.asAdventureComponent(displayName));
+    }
+
+    /**
+     * Sets the displayed name of the {@link TabListEntry}.
+     *
+     * @param displayName to set
+     * @return {@code this}, for chaining
+     * @see TabListEntry#getDisplayNameComponent() ()
      */
     public Builder displayName(@Nullable Component displayName) {
       this.displayName = displayName;

api/src/main/java/com/velocitypowered/api/proxy/server/QueryResponse.java

@@ -49,7 +49,7 @@ public final class QueryResponse {
 
   /**
    * Get hostname which will be used to reply to the query. By default it is {@link
-   * ProxyConfig#getMotdComponent()} in plain text without colour codes.
+   * ProxyConfig#getMotd()} in plain text without colour codes.
    *
    * @return hostname
    */

api/src/main/java/com/velocitypowered/api/proxy/server/RegisteredServer.java

@@ -1,14 +1,17 @@
 package com.velocitypowered.api.proxy.server;
 
 import com.velocitypowered.api.proxy.Player;
+import com.velocitypowered.api.proxy.ProxyAudience;
 import com.velocitypowered.api.proxy.messages.ChannelMessageSink;
 import java.util.Collection;
 import java.util.concurrent.CompletableFuture;
 
 /**
- * Represents a server that has been registered with the proxy.
+ * Represents a server that has been registered with the proxy. The {@code Audience} associated with
+ * a {@code RegisteredServer} represent all players on the server connected to this proxy and do not
+ * interact with the server in any way.
  */
-public interface RegisteredServer extends ChannelMessageSink {
+public interface RegisteredServer extends ChannelMessageSink, ProxyAudience {
 
   /**
    * Returns the {@link ServerInfo} for this server.

api/src/main/java/com/velocitypowered/api/proxy/server/ServerPing.java

@@ -3,6 +3,7 @@ package com.velocitypowered.api.proxy.server;
 import com.google.common.base.MoreObjects;
 import com.google.common.base.Preconditions;
 import com.google.common.collect.ImmutableList;
+import com.velocitypowered.api.util.AdventureCompat;
 import com.velocitypowered.api.util.Favicon;
 import com.velocitypowered.api.util.ModInfo;
 import java.util.ArrayList;
@@ -12,7 +13,6 @@ import java.util.Objects;
 import java.util.Optional;
 import java.util.UUID;
 
-import net.kyori.text.Component;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
 /**
@@ -22,12 +22,19 @@ public final class ServerPing {
 
   private final Version version;
   private final @Nullable Players players;
-  private final Component description;
+  private final net.kyori.adventure.text.Component description;
   private final @Nullable Favicon favicon;
   private final @Nullable ModInfo modinfo;
 
-  public ServerPing(Version version, @Nullable Players players, Component description,
-      @Nullable Favicon favicon) {
+  @Deprecated
+  public ServerPing(Version version, @Nullable Players players,
+      net.kyori.text.Component description, @Nullable Favicon favicon) {
+    this(version, players, AdventureCompat.asAdventureComponent(description), favicon,
+        ModInfo.DEFAULT);
+  }
+
+  public ServerPing(Version version, @Nullable Players players,
+      net.kyori.adventure.text.Component description, @Nullable Favicon favicon) {
     this(version, players, description, favicon, ModInfo.DEFAULT);
   }
 
@@ -40,8 +47,25 @@ public final class ServerPing {
    * @param favicon the server's favicon
    * @param modinfo the mods this server runs
    */
-  public ServerPing(Version version, @Nullable Players players, Component description,
-      @Nullable Favicon favicon, @Nullable ModInfo modinfo) {
+  @Deprecated
+  public ServerPing(Version version, @Nullable Players players,
+      net.kyori.text.Component description, @Nullable Favicon favicon,
+      @Nullable ModInfo modinfo) {
+    this(version, players, AdventureCompat.asAdventureComponent(description), favicon, modinfo);
+  }
+
+  /**
+   * Constructs a ServerPing instance.
+   *
+   * @param version the version of the server
+   * @param players the players on the server
+   * @param description the MOTD for the server
+   * @param favicon the server's favicon
+   * @param modinfo the mods this server runs
+   */
+  public ServerPing(Version version, @Nullable Players players,
+      net.kyori.adventure.text.Component description, @Nullable Favicon favicon,
+      @Nullable ModInfo modinfo) {
     this.version = Preconditions.checkNotNull(version, "version");
     this.players = players;
     this.description = Preconditions.checkNotNull(description, "description");
@@ -57,7 +81,12 @@ public final class ServerPing {
     return Optional.ofNullable(players);
   }
 
-  public Component getDescription() {
+  @Deprecated
+  public net.kyori.text.Component getDescription() {
+    return AdventureCompat.asOriginalTextComponent(description);
+  }
+
+  public net.kyori.adventure.text.Component getDescriptionComponent() {
     return description;
   }
 
@@ -143,7 +172,7 @@ public final class ServerPing {
     private final List<SamplePlayer> samplePlayers = new ArrayList<>();
     private String modType = "FML";
     private final List<ModInfo.Mod> mods = new ArrayList<>();
-    private @Nullable Component description;
+    private net.kyori.adventure.text.Component description;
     private @Nullable Favicon favicon;
     private boolean nullOutPlayers;
     private boolean nullOutModinfo;
@@ -215,7 +244,13 @@ public final class ServerPing {
       return this;
     }
 
-    public Builder description(Component description) {
+    @Deprecated
+    public Builder description(net.kyori.text.Component description) {
+      this.description(AdventureCompat.asAdventureComponent(description));
+      return this;
+    }
+
+    public Builder description(net.kyori.adventure.text.Component description) {
       this.description = Preconditions.checkNotNull(description, "description");
       return this;
     }
@@ -258,7 +293,11 @@ public final class ServerPing {
       return samplePlayers;
     }
 
-    public Optional<Component> getDescription() {
+    public Optional<net.kyori.text.Component> getDescription() {
+      return Optional.ofNullable(description).map(AdventureCompat::asOriginalTextComponent);
+    }
+
+    public Optional<net.kyori.adventure.text.Component> getDescriptionComponent() {
       return Optional.ofNullable(description);
     }
 

api/src/main/java/com/velocitypowered/api/util/AdventureCompat.java

@@ -0,0 +1,29 @@
+package com.velocitypowered.api.util;
+
+/**
+ * Utilities to convert from adventure {@link net.kyori.adventure.text.Component}s to text
+ * {@link net.kyori.text.Component}s and vice versa.
+ *
+ * @deprecated Provided only as a transitional aid, will be removed in Velocity 2.0.0
+ */
+@Deprecated
+public class AdventureCompat {
+  private AdventureCompat() {
+    throw new AssertionError("Do not create instances of this class.");
+  }
+
+  public static net.kyori.adventure.text.Component asAdventureComponent(
+      net.kyori.text.Component component) {
+    String json = net.kyori.text.serializer.gson.GsonComponentSerializer.INSTANCE
+        .serialize(component);
+    return net.kyori.adventure.text.serializer.gson.GsonComponentSerializer.gson()
+        .deserialize(json);
+  }
+
+  public static net.kyori.text.Component asOriginalTextComponent(
+      net.kyori.adventure.text.Component component) {
+    String json = net.kyori.adventure.text.serializer.gson.GsonComponentSerializer
+        .colorDownsamplingGson().serialize(component);
+    return net.kyori.text.serializer.gson.GsonComponentSerializer.INSTANCE.deserialize(json);
+  }
+}

api/src/main/java/com/velocitypowered/api/util/bossbar/BossBar.java

@@ -7,7 +7,10 @@ import net.kyori.text.Component;
 /**
  * Represents a boss bar, which can be send to a (group of) player(s).
  * <b>Boss bars only work on 1.9 and above.</b>
+ *
+ * @deprecated Replaced with {@link net.kyori.adventure.bossbar.BossBar}
  */
+@Deprecated
 public interface BossBar {
 
   /**

api/src/main/java/com/velocitypowered/api/util/bossbar/BossBarColor.java

@@ -2,7 +2,10 @@ package com.velocitypowered.api.util.bossbar;
 
 /**
  * Represents a color of a {@link BossBar}.
+ *
+ * @deprecated Replaced with {@link net.kyori.adventure.bossbar.BossBar.Color}
  */
+@Deprecated
 public enum BossBarColor {
   PINK,
   BLUE,

api/src/main/java/com/velocitypowered/api/util/bossbar/BossBarFlag.java

@@ -2,7 +2,10 @@ package com.velocitypowered.api.util.bossbar;
 
 /**
  * Represents any {@link BossBar}'s flags.
+ *
+ * @deprecated Replaced with {@link net.kyori.adventure.bossbar.BossBar.Flag}
  */
+@Deprecated
 public enum BossBarFlag {
   DARKEN_SCREEN,
   PLAY_BOSS_MUSIC,

api/src/main/java/com/velocitypowered/api/util/bossbar/BossBarOverlay.java

@@ -2,7 +2,10 @@ package com.velocitypowered.api.util.bossbar;
 
 /**
  * Represents a overlay of a {@link BossBar}.
+ *
+ * @deprecated Replaced with {@link net.kyori.adventure.bossbar.BossBar.Overlay}
  */
+@Deprecated
 public enum BossBarOverlay {
   PROGRESS,
   NOTCHED_6,

api/src/main/java/com/velocitypowered/api/util/title/TextTitle.java

@@ -9,7 +9,10 @@ import org.checkerframework.checker.nullness.qual.Nullable;
 
 /**
  * Represents a "full" title, including all components. This class is immutable.
+ *
+ * @deprecated Replaced with {@link net.kyori.adventure.title.Title}
  */
+@Deprecated
 public final class TextTitle implements Title {
 
   private final @Nullable Component title;

api/src/main/java/com/velocitypowered/api/util/title/Title.java

@@ -2,7 +2,10 @@ package com.velocitypowered.api.util.title;
 
 /**
  * Represents a title that can be sent to a Minecraft client.
+ *
+ * @deprecated Replaced with {@link net.kyori.adventure.title.Title}
  */
+@Deprecated
 public interface Title {
 
 }

api/src/main/java/com/velocitypowered/api/util/title/Titles.java

@@ -2,7 +2,10 @@ package com.velocitypowered.api.util.title;
 
 /**
  * Provides special-purpose titles.
+ *
+ * @deprecated Replaced with {@link net.kyori.adventure.title.Title}
  */
+@Deprecated
 public final class Titles {
 
   private Titles() {

api/src/main/java/com/velocitypowered/api/util/title/package-info.java

@@ -1,4 +1,6 @@
 /**
  * Provides data structures for creating and manipulating titles.
+ *
+ * @deprecated Replaced with {@link net.kyori.adventure.title}
  */
 package com.velocitypowered.api.util.title;