Add more advancement API

== AT ==
public net.minecraft.advancements.Advancement decorateName(Lnet/minecraft/advancements/DisplayInfo;)Lnet/minecraft/network/chat/Component;

Co-authored-by: Jake Potrebic <jake.m.potrebic@gmail.com>

paper-server/patches/sources/net/minecraft/advancements/DisplayInfo.java.patch

@@ -0,0 +1,10 @@
+--- a/net/minecraft/advancements/DisplayInfo.java
++++ b/net/minecraft/advancements/DisplayInfo.java
+@@ -37,6 +37,7 @@
+     private final boolean hidden;
+     private float x;
+     private float y;
++    public final io.papermc.paper.advancement.AdvancementDisplay paper = new io.papermc.paper.advancement.PaperAdvancementDisplay(this); // Paper - Add more advancement API
+ 
+     public DisplayInfo(
+         ItemStack icon,

paper-server/src/main/java/io/papermc/paper/advancement/PaperAdvancementDisplay.java

@@ -0,0 +1,69 @@
+package io.papermc.paper.advancement;
+
+import io.papermc.paper.adventure.PaperAdventure;
+import net.kyori.adventure.text.Component;
+import net.minecraft.advancements.Advancement;
+import net.minecraft.advancements.AdvancementType;
+import net.minecraft.advancements.DisplayInfo;
+import org.bukkit.NamespacedKey;
+import org.bukkit.craftbukkit.inventory.CraftItemStack;
+import org.bukkit.craftbukkit.util.CraftNamespacedKey;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+public record PaperAdvancementDisplay(DisplayInfo handle) implements AdvancementDisplay {
+
+    @Override
+    public @NotNull Frame frame() {
+        return asPaperFrame(this.handle.getType());
+    }
+
+    @Override
+    public @NotNull Component title() {
+        return PaperAdventure.asAdventure(this.handle.getTitle());
+    }
+
+    @Override
+    public @NotNull Component description() {
+        return PaperAdventure.asAdventure(this.handle.getDescription());
+    }
+
+    @Override
+    public @NotNull ItemStack icon() {
+        return CraftItemStack.asBukkitCopy(this.handle.getIcon());
+    }
+
+    @Override
+    public boolean doesShowToast() {
+        return this.handle.shouldShowToast();
+    }
+
+    @Override
+    public boolean doesAnnounceToChat() {
+        return this.handle.shouldAnnounceChat();
+    }
+
+    @Override
+    public boolean isHidden() {
+        return this.handle.isHidden();
+    }
+
+    @Override
+    public @Nullable NamespacedKey backgroundPath() {
+        return this.handle.getBackground().map(CraftNamespacedKey::fromMinecraft).orElse(null);
+    }
+
+    @Override
+    public @NotNull Component displayName() {
+        return PaperAdventure.asAdventure(Advancement.decorateName(java.util.Objects.requireNonNull(this.handle, "cannot build display name for null handle, invalid state")));
+    }
+
+    public static @NotNull Frame asPaperFrame(final @NotNull AdvancementType frameType) {
+        return switch (frameType) {
+            case TASK -> Frame.TASK;
+            case CHALLENGE -> Frame.CHALLENGE;
+            case GOAL -> Frame.GOAL;
+        };
+    }
+}

paper-server/src/main/java/org/bukkit/craftbukkit/advancement/CraftAdvancement.java

@@ -35,12 +35,47 @@ public class CraftAdvancement implements org.bukkit.advancement.Advancement {
         return new CraftAdvancementRequirements(this.handle.value().requirements());
     }
 
+    // Paper start - Add more advancement API
     @Override
-    public AdvancementDisplay getDisplay() {
+    public io.papermc.paper.advancement.AdvancementDisplay getDisplay() {
-        if (this.handle.value().display().isEmpty()) {
+        return this.handle.value().display().map(d -> d.paper).orElse(null);
-            return null;
     }
 
-        return new CraftAdvancementDisplay(this.handle.value().display().get());
+    @Deprecated
+    @io.papermc.paper.annotation.DoNotUse
+    public AdvancementDisplay getDisplay0() { // May be called by plugins via Commodore
+        return this.handle.value().display().map(CraftAdvancementDisplay::new).orElse(null);
+    }
+
+    @Override
+    public net.kyori.adventure.text.Component displayName() {
+        return io.papermc.paper.adventure.PaperAdventure.asAdventure(net.minecraft.advancements.Advancement.name(this.handle));
+    }
+
+    @Override
+    public org.bukkit.advancement.Advancement getParent() {
+        return this.handle.value().parent()
+            .map(net.minecraft.server.MinecraftServer.getServer().getAdvancements()::get)
+            .map(AdvancementHolder::toBukkit)
+            .orElse(null);
+    }
+
+    @Override
+    public Collection<org.bukkit.advancement.Advancement> getChildren() {
+        final com.google.common.collect.ImmutableList.Builder<org.bukkit.advancement.Advancement> children = com.google.common.collect.ImmutableList.<org.bukkit.advancement.Advancement>builder();
+        final net.minecraft.advancements.AdvancementNode advancementNode = net.minecraft.server.MinecraftServer.getServer().getAdvancements().tree().get(this.handle);
+        if (advancementNode != null) {
+            for (final net.minecraft.advancements.AdvancementNode child : advancementNode.children()) {
+                children.add(child.holder().toBukkit());
             }
         }
+        return children.build();
+    }
+
+    @Override
+    public org.bukkit.advancement.Advancement getRoot() {
+        final net.minecraft.advancements.AdvancementNode advancementNode = net.minecraft.server.MinecraftServer.getServer().getAdvancements().tree().get(this.handle);
+        return java.util.Objects.requireNonNull(advancementNode, "could not find internal advancement node for advancement " + this.handle.id()).root().holder().toBukkit();
+    }
+    // Paper end - Add more advancement API
+}

paper-server/src/main/java/org/bukkit/craftbukkit/advancement/CraftAdvancementDisplay.java

@@ -6,6 +6,7 @@ import org.bukkit.craftbukkit.inventory.CraftItemStack;
 import org.bukkit.craftbukkit.util.CraftChatMessage;
 import org.bukkit.inventory.ItemStack;
 
+@Deprecated // Paper
 public class CraftAdvancementDisplay implements org.bukkit.advancement.AdvancementDisplay {
 
     private final DisplayInfo handle;

paper-server/src/main/java/org/bukkit/craftbukkit/util/Commodore.java

@@ -458,6 +458,11 @@ public class Commodore {
                             super.visitMethodInsn(opcode, owner, name, "()Lcom/destroystokyo/paper/profile/PlayerProfile;", itf);
                             return;
                         }
+                        if (owner.equals("org/bukkit/advancement/Advancement") && name.equals("getDisplay") && desc.endsWith(")Lorg/bukkit/advancement/AdvancementDisplay;")) {
+                            super.visitTypeInsn(Opcodes.CHECKCAST, runtimeCbPkgPrefix() + "advancement/CraftAdvancement");
+                            super.visitMethodInsn(Opcodes.INVOKEVIRTUAL, runtimeCbPkgPrefix() + "advancement/CraftAdvancement", "getDisplay0", desc, false);
+                            return;
+                        }
                         // Paper end
 
                         if (modern) {

paper-server/src/test/java/io/papermc/paper/advancement/AdvancementFrameTest.java

@@ -0,0 +1,26 @@
+package io.papermc.paper.advancement;
+
+import io.papermc.paper.adventure.PaperAdventure;
+import net.kyori.adventure.text.format.TextColor;
+import net.minecraft.advancements.AdvancementType;
+import net.minecraft.network.chat.contents.TranslatableContents;
+import org.bukkit.support.environment.Normal;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+@Normal
+public class AdvancementFrameTest {
+
+    @Test
+    public void test() {
+        for (final AdvancementType advancementType : AdvancementType.values()) {
+            final TextColor expectedColor = PaperAdventure.asAdventure(advancementType.getChatColor());
+            final String expectedTranslationKey = ((TranslatableContents) advancementType.getDisplayName().getContents()).getKey();
+            final var frame = PaperAdvancementDisplay.asPaperFrame(advancementType);
+            assertEquals(expectedTranslationKey, frame.translationKey(), "The translation keys should be the same");
+            assertEquals(expectedColor, frame.color(), "The frame colors should be the same");
+            assertEquals(advancementType.getSerializedName(), AdvancementDisplay.Frame.NAMES.key(frame));
+        }
+    }
+}