From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <blake.galbreath@gmail.com>
Date: Tue, 3 Nov 2020 01:25:06 -0600
Subject: [PATCH] Allow color codes in books


diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index 0ffad0fee921ac302f31894766594921751fbff9..62fdb1e8b84facec3ce69d5001e7d626d74a37ce 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -1214,10 +1214,14 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
             Objects.requireNonNull(list);
             optional.ifPresent(list::add);
             list.addAll(packet.pages());
+            // Purpur start
+            boolean hasEditPerm = getCraftPlayer().hasPermission("purpur.book.color.edit");
+            boolean hasSignPerm = hasEditPerm || getCraftPlayer().hasPermission("purpur.book.color.sign");
+            // Purpur end
             Consumer<List<FilteredText>> consumer = optional.isPresent() ? (list1) -> {
-                this.signBook((FilteredText) list1.get(0), list1.subList(1, list1.size()), i);
+                this.signBook((FilteredText) list1.get(0), list1.subList(1, list1.size()), i, hasSignPerm); // Purpur
             } : (list1) -> {
-                this.updateBookContents(list1, i);
+                this.updateBookContents(list1, i, hasEditPerm); // Purpur
             };
 
             this.filterTextPacket((List) list).thenAcceptAsync(consumer, this.server);
@@ -1225,13 +1229,18 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
     }
 
     private void updateBookContents(List<FilteredText> pages, int slotId) {
+    // Purpur start
+        updateBookContents(pages, slotId, false);
+    }
+    private void updateBookContents(List<FilteredText> pages, int slotId, boolean hasPerm) {
+    // Purpur end
         // CraftBukkit start
         ItemStack handItem = this.player.getInventory().getItem(slotId);
         ItemStack itemstack = handItem.copy();
         // CraftBukkit end
 
         if (itemstack.has(DataComponents.WRITABLE_BOOK_CONTENT)) {
-            List<Filterable<String>> list1 = pages.stream().map(this::filterableFromOutgoing).toList();
+            List<Filterable<String>> list1 = pages.stream().map(filteredText -> filterableFromOutgoing(filteredText).map(s -> color(s, hasPerm))).toList(); // Purpur
 
             itemstack.set(DataComponents.WRITABLE_BOOK_CONTENT, new WritableBookContent(list1));
             this.player.getInventory().setItem(slotId, CraftEventFactory.handleEditBookEvent(this.player, slotId, handItem, itemstack)); // CraftBukkit // Paper - Don't ignore result (see other callsite for handleEditBookEvent)
@@ -1239,6 +1248,11 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
     }
 
     private void signBook(FilteredText title, List<FilteredText> pages, int slotId) {
+    // Purpur start
+        signBook(title, pages, slotId, false);
+    }
+    private void signBook(FilteredText title, List<FilteredText> pages, int slotId, boolean hasPerm) {
+    // Purpur end
         ItemStack itemstack = this.player.getInventory().getItem(slotId);
 
         if (itemstack.has(DataComponents.WRITABLE_BOOK_CONTENT)) {
@@ -1246,10 +1260,10 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
 
             itemstack1.remove(DataComponents.WRITABLE_BOOK_CONTENT);
             List<Filterable<Component>> list1 = (List<Filterable<Component>>) (List) pages.stream().map((filteredtext1) -> { // CraftBukkit - decompile error
-                return this.filterableFromOutgoing(filteredtext1).map(Component::literal);
+                return this.filterableFromOutgoing(filteredtext1).map(s -> hexColor(s, hasPerm)); // Purpur
             }).toList();
 
-            itemstack1.set(DataComponents.WRITTEN_BOOK_CONTENT, new WrittenBookContent(this.filterableFromOutgoing(title), this.player.getName().getString(), 0, list1, true));
+            itemstack1.set(DataComponents.WRITTEN_BOOK_CONTENT, new WrittenBookContent(this.filterableFromOutgoing(title).map(s -> color(s, hasPerm)), this.player.getName().getString(), 0, list1, true)); // Purpur
             CraftEventFactory.handleEditBookEvent(this.player, slotId, itemstack, itemstack1); // CraftBukkit
             this.player.getInventory().setItem(slotId, itemstack); // CraftBukkit - event factory updates the hand book
         }
@@ -1259,6 +1273,16 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
         return this.player.isTextFilteringEnabled() ? Filterable.passThrough(message.filteredOrEmpty()) : Filterable.from(message);
     }
 
+    // Purpur start
+    private Component hexColor(String str, boolean hasPerm) {
+        return hasPerm ? PaperAdventure.asVanilla(net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacyAmpersand().deserialize(str)) : Component.literal(str);
+    }
+
+    private String color(String str, boolean hasPerm) {
+        return hasPerm ? org.bukkit.ChatColor.color(str, false) : str;
+    }
+    // Purpur end
+
     @Override
     public void handleEntityTagQuery(ServerboundEntityTagQueryPacket packet) {
         PacketUtils.ensureRunningOnSameThread(packet, this, this.player.serverLevel());