1 files changed, 113 insertions, 0 deletions
diff --git a/patches/server/0838-API-for-updating-recipes-on-clients.patch b/patches/server/0838-API-for-updating-recipes-on-clients.patch
new file mode 100644
index 0000000000..77a9a4fe09
--- /dev/null
+++ b/patches/server/0838-API-for-updating-recipes-on-clients.patch
@@ -0,0 +1,113 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Jake Potrebic <[email protected]>
+Date: Sat, 21 Aug 2021 17:25:38 -0700
+Subject: [PATCH] API for updating recipes on clients
+
+
+diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
+index 8b54fab09699dec0cb0fb6063accb04e48a36b6e..bd097ae6edfc0ad810d41ed8bbc7fab34d255610 100644
+--- a/src/main/java/net/minecraft/server/players/PlayerList.java
++++ b/src/main/java/net/minecraft/server/players/PlayerList.java
+@@ -1449,6 +1449,13 @@ public abstract class PlayerList {
+     }
+ 
+     public void reloadResources() {
++        // Paper start - API for updating recipes on clients
++        this.reloadAdvancementData();
++        this.reloadTagData();
++        this.reloadRecipes();
++    }
++    public void reloadAdvancementData() {
++        // Paper end - API for updating recipes on clients
+         // CraftBukkit start
+         /*Iterator iterator = this.advancements.values().iterator();
+ 
+@@ -1464,9 +1471,13 @@ public abstract class PlayerList {
+         }
+         // CraftBukkit end
+ 
++        // Paper start - API for updating recipes on clients
++    }
++    public void reloadTagData() {
+         this.broadcastAll(new ClientboundUpdateTagsPacket(TagNetworkSerialization.serializeTagsToNetwork(this.registries)));
+         // CraftBukkit start
+-        this.reloadRecipes();
++        // this.reloadRecipes(); // Paper - do not reload recipes just because tag data was reloaded
++        // Paper end - API for updating recipes on clients
+     }
+ 
+     public void reloadRecipes() {
+diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+index 54b5dee7cfd19ad58e376eee80d3827f1a80cfcd..a755137d8d4b266a648cb2a4f41a5ed00262f121 100644
+--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
++++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+@@ -1190,6 +1190,18 @@ public final class CraftServer implements Server {
+         ReloadCommand.reload(this.console);
+     }
+ 
++    // Paper start - API for updating recipes on clients
++    @Override
++    public void updateResources() {
++        this.playerList.reloadResources();
++    }
++
++    @Override
++    public void updateRecipes() {
++        this.playerList.reloadRecipes();
++    }
++    // Paper end - API for updating recipes on clients
++
+     private void loadIcon() {
+         this.icon = new CraftIconCache(null);
+         try {
+@@ -1569,6 +1581,13 @@ public final class CraftServer implements Server {
+ 
+     @Override
+     public boolean addRecipe(Recipe recipe) {
++        // Paper start - API for updating recipes on clients
++        return this.addRecipe(recipe, false);
++    }
++
++    @Override
++    public boolean addRecipe(Recipe recipe, boolean resendRecipes) {
++        // Paper end - API for updating recipes on clients
+         CraftRecipe toAdd;
+         if (recipe instanceof CraftRecipe) {
+             toAdd = (CraftRecipe) recipe;
+@@ -1600,6 +1619,11 @@ public final class CraftServer implements Server {
+             }
+         }
+         toAdd.addToCraftingManager();
++        // Paper start - API for updating recipes on clients
++        if (true || resendRecipes) { // Always needs to be resent now... TODO
++            this.playerList.reloadRecipes();
++        }
++        // Paper end - API for updating recipes on clients
+         return true;
+     }
+ 
+@@ -1780,9 +1804,23 @@ public final class CraftServer implements Server {
+ 
+     @Override
+     public boolean removeRecipe(NamespacedKey recipeKey) {
++        // Paper start - API for updating recipes on clients
++        return this.removeRecipe(recipeKey, false);
++    }
++
++    @Override
++    public boolean removeRecipe(NamespacedKey recipeKey, boolean resendRecipes) {
++        // Paper end - API for updating recipes on clients
+         Preconditions.checkArgument(recipeKey != null, "recipeKey == null");
+ 
+-        return this.getServer().getRecipeManager().removeRecipe(CraftRecipe.toMinecraft(recipeKey));
++        // Paper start - resend recipes on successful removal
++        final ResourceKey<net.minecraft.world.item.crafting.Recipe<?>> minecraftKey = CraftRecipe.toMinecraft(recipeKey);
++        final boolean removed = this.getServer().getRecipeManager().removeRecipe(minecraftKey);
++        if (removed/* && resendRecipes*/) { // TODO Always need to resend them rn - deprecate this method?
++            this.playerList.reloadRecipes();
++        }
++        return removed;
++        // Paper end - resend recipes on successful removal
+     }
+ 
+     @Override