Chat Preview API (#1050)

patches/api/0049-Chat-Preview-API.patch

@@ -0,0 +1,102 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: BillyGalbreath <blake.galbreath@gmail.com>
+Date: Mon, 11 Jul 2022 21:09:14 -0500
+Subject: [PATCH] Chat Preview API
+
+
+diff --git a/src/main/java/org/purpurmc/purpur/event/player/PlayerPreviewChatEvent.java b/src/main/java/org/purpurmc/purpur/event/player/PlayerPreviewChatEvent.java
+new file mode 100644
+index 0000000000000000000000000000000000000000..502896f69a139c9524625a2c0d9029f85276146b
+--- /dev/null
++++ b/src/main/java/org/purpurmc/purpur/event/player/PlayerPreviewChatEvent.java
+@@ -0,0 +1,90 @@
++package org.purpurmc.purpur.event.player;
++
++import net.kyori.adventure.text.Component;
++import org.bukkit.Bukkit;
++import org.bukkit.entity.Player;
++import org.bukkit.event.Cancellable;
++import org.bukkit.event.HandlerList;
++import org.bukkit.event.player.PlayerEvent;
++import org.jetbrains.annotations.NotNull;
++import org.jetbrains.annotations.Nullable;
++
++public class PlayerPreviewChatEvent extends PlayerEvent implements Cancellable {
++    private static final HandlerList handlers = new HandlerList();
++    private final String originalQuery;
++    private Component query;
++
++    public PlayerPreviewChatEvent(@NotNull Player who, @NotNull String originalQuery, @Nullable Component query) {
++        super(who, !Bukkit.isPrimaryThread());
++        this.originalQuery = originalQuery;
++        this.query = query;
++    }
++
++    /**
++     * The original query string as sent from the client
++     *
++     * @return The original query string
++     */
++    @NotNull
++    public String getOriginalQuery() {
++        return originalQuery;
++    }
++
++    /**
++     * Get the current query.
++     * <p>
++     * Null queries represent "no changes".
++     *
++     * @return Current query
++     */
++    @Nullable
++    public Component getQuery() {
++        return this.query;
++    }
++
++    /**
++     * Get the current query.
++     * <p>
++     * Null queries represent "no changes".
++     *
++     * @param query The current query
++     */
++    public void setQuery(@Nullable Component query) {
++        this.query = query;
++    }
++
++    /**
++     * Gets the cancellation state of this event.
++     * <p>
++     * A cancelled event tells the client there are "no changes"
++     * to the chat, the same as setting the query to null.
++     *
++     * @return true if this event is cancelled
++     */
++    @Override
++    public boolean isCancelled() {
++        return this.query == null;
++    }
++
++    /**
++     * Sets the cancellation state of this event.
++     * <p>
++     * A cancelled event tells the client there are "no changes"
++     * to the chat, the same as setting the query to null.
++     */
++    @Override
++    public void setCancelled(boolean cancel) {
++        this.query = null;
++    }
++
++    @Override
++    @NotNull
++    public HandlerList getHandlers() {
++        return handlers;
++    }
++
++    @NotNull
++    public static HandlerList getHandlerList() {
++        return handlers;
++    }
++}

patches/server/0288-Chat-Preview-API.patch

@@ -0,0 +1,40 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: BillyGalbreath <blake.galbreath@gmail.com>
+Date: Mon, 11 Jul 2022 20:44:19 -0500
+Subject: [PATCH] Chat Preview API
+
+
+diff --git a/src/main/java/net/minecraft/network/chat/ChatDecorator.java b/src/main/java/net/minecraft/network/chat/ChatDecorator.java
+index d07bb2d1f365cb7c92a1252b83210fa38cbeeb1d..89bed23716b21fe6e1079fa9fc5d13688c2fee04 100644
+--- a/src/main/java/net/minecraft/network/chat/ChatDecorator.java
++++ b/src/main/java/net/minecraft/network/chat/ChatDecorator.java
+@@ -8,6 +8,16 @@ import net.minecraft.server.network.FilteredText;
+ @FunctionalInterface
+ public interface ChatDecorator {
+     ChatDecorator PLAIN = (sender, message) -> {
++        // Purpur start
++        net.kyori.adventure.text.Component adventureComponent = io.papermc.paper.adventure.PaperAdventure.asAdventure(message);
++        org.purpurmc.purpur.event.player.PlayerPreviewChatEvent previewEvent = new org.purpurmc.purpur.event.player.PlayerPreviewChatEvent(sender.getBukkitEntity(), "", adventureComponent);
++        if (!previewEvent.callEvent()) {
++            return CompletableFuture.completedFuture(null);
++        }
++        if (!previewEvent.getQuery().equals(adventureComponent)) {
++            return CompletableFuture.completedFuture(io.papermc.paper.adventure.PaperAdventure.asVanilla(previewEvent.getQuery()));
++        }
++        // Purpur end
+         return CompletableFuture.completedFuture(message);
+     };
+
+diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+index 3bb51f34be4341c991487a78d8793f074ffdcba4..d42a3a2ae2ed00f868d73ea0a0e90301301db380 100644
+--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
++++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+@@ -2512,7 +2512,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
+
+     @Override
+     public void handleChatPreview(ServerboundChatPreviewPacket packet) {
+-        if (false && this.server.previewsChat()) { // CraftBukkit - preview NYI
++        if (this.server.previewsChat()) { // CraftBukkit - preview NYI // Purpur - lets implement it already.. sheesh
+             this.chatPreviewThrottler.schedule(() -> {
+                 int i = packet.queryId();
+                 String s = packet.query();