feat(plugin-api): expand item stack

pumpkin-plugin-wit/v0.1/command.wit

@@ -2,7 +2,8 @@ interface command {
     use %world.{%world, entity};
     use player.{player};
     use block-entity.{command-block-entity};
-    use common.{position, block-position, locale, item-stack, game-mode};
+    use common.{position, block-position, locale, game-mode};
+    use item-stack.{item-stack};
     use server.{server, difficulty};
     use text.{text-component};
 

pumpkin-plugin-wit/v0.1/common.wit

@@ -59,34 +59,6 @@ interface common {
         b: u8,
     }
 
-    use data-components.{data-component};
-    use enchantments.{enchantment};
-
-    /// Represents an enchantment and its level.
-    record enchantment-value {
-        enchantment: enchantment,
-        level: u32,
-    }
-
-    /// Represents a data component and its serialized value.
-    record data-component-value {
-        component: data-component,
-        /// The serialized value of the component.
-        value: list<u8>,
-    }
-
-    /// Represents a stack of items with its type and count.
-    record item-stack {
-        /// The unique registry key (e.g., "minecraft:diamond").
-        registry-key: string,
-        /// The number of items in the stack.
-        count: u8,
-        /// The data components associated with this item stack.
-        components: list<data-component-value>,
-        /// The enchantments associated with this item stack.
-        enchantments: list<enchantment-value>,
-    }
-
     /// Represents the type of click interaction in a GUI.
     enum click-type {
         left,

pumpkin-plugin-wit/v0.1/event.wit

@@ -1,5 +1,6 @@
 interface event {
-    use common.{block-position, game-mode, hand, item-stack, position, click-type};
+    use common.{block-position, game-mode, hand, position, click-type};
+    use item-stack.{item-stack};
     use player.{player};
     use text.{text-component};
     use %world.{%world};

pumpkin-plugin-wit/v0.1/gui.wit

@@ -1,6 +1,7 @@
 interface gui {
     use text.{text-component};
-    use common.{item-stack, click-type};
+    use common.{click-type};
+    use item-stack.{item-stack};
 
     enum gui-type {
         generic-9x1,

pumpkin-plugin-wit/v0.1/item-stack.wit

@@ -0,0 +1,59 @@
+interface item-stack {
+    use data-components.{data-component};
+    use enchantments.{enchantment};
+    use text.{text-component};
+
+    /// Represents an enchantment and its level.
+    record enchantment-value {
+        enchantment: enchantment,
+        level: u32,
+    }
+
+    /// Represents a data component and its serialized value.
+    record data-component-value {
+        component: data-component,
+        /// The serialized value of the component.
+        value: list<u8>,
+    }
+
+    resource item-stack {
+        constructor(registry-key: string, count: u8);
+
+        /// Returns the unique registry key of the item (e.g., "minecraft:diamond").
+        get-registry-key: func() -> string;
+        
+        /// Returns the number of items in the stack.
+        get-count: func() -> u8;
+        /// Sets the number of items in the stack.
+        set-count: func(count: u8);
+
+        /// Returns the maximum number of items that can be in this stack.
+        get-max-count: func() -> u8;
+
+        /// Returns all enchantments on this item stack.
+        get-enchantments: func() -> list<enchantment-value>;
+        /// Adds an enchantment to this item stack.
+        add-enchantment: func(enchantment: enchantment, level: u32);
+        /// Removes an enchantment from this item stack.
+        remove-enchantment: func(enchantment: enchantment);
+
+        /// Returns the lore of this item stack.
+        get-lore: func() -> list<text-component>;
+        /// Sets the lore of this item stack.
+        set-lore: func(lore: list<text-component>);
+        /// Adds a line to the lore of this item stack.
+        add-lore: func(line: text-component);
+
+        /// Returns the custom name of this item stack, if set.
+        get-custom-name: func() -> option<text-component>;
+        /// Sets the custom name of this item stack.
+        set-custom-name: func(name: option<text-component>);
+
+        /// Returns all data components on this item stack.
+        get-components: func() -> list<data-component-value>;
+        /// Sets a data component on this item stack.
+        set-component: func(component: data-component, value: list<u8>);
+        /// Removes a data component from this item stack.
+        remove-component: func(component: data-component);
+    }
+}

pumpkin-plugin-wit/v0.1/java-dialogs.wit

@@ -3,7 +3,7 @@
 /// and interactive inputs (checkboxes, text fields, sliders).
 interface java-dialogs {
     use text.{text-component};
-    use common.{item-stack};
+    use item-stack.{item-stack};
 
     /// Represents the layout and button configuration of a dialog.
     enum dialog-type {

pumpkin-plugin-wit/v0.1/player.wit

@@ -1,6 +1,7 @@
 /// Represents a player connected to the Minecraft server.
 interface player {
-    use common.{hand, item-stack, position, game-mode};
+    use common.{hand, position, game-mode};
+    use item-stack.{item-stack};
     use %world.{%world, entity};
     use permission.{permission-level};
     use text.{text-component};

pumpkin-plugin-wit/v0.1/world.wit

@@ -246,6 +246,18 @@ interface %world {
         /// Returns the minimum Y coordinate (bottom of the world).
         get-min-y: func() -> s32;
 
+        /// Returns the sky light level at the specified position.
+        get-sky-light: func(pos: block-pos) -> u8;
+
+        /// Sets the sky light level at the specified position.
+        set-sky-light: func(pos: block-pos, level: u8);
+
+        /// Returns the block light level at the specified position.
+        get-block-light: func(pos: block-pos) -> u8;
+
+        /// Sets the block light level at the specified position.
+        set-block-light: func(pos: block-pos, level: u8);
+
         /// Returns a list of all entities in this world.
         get-entities: func() -> list<entity>;
     }

pumpkin/src/plugin/loader/wasm/wasm_host/state.rs

@@ -53,6 +53,7 @@ pub type CommandResource = WasmResource<CommandTree>;
 pub type CommandSenderResource = WasmResource<CommandSender>;
 pub type ConsumedArgsResource = WasmResource<OwnedConsumedArgs>;
 pub type CommandNodeResource = WasmResource<NonLeafNodeBuilder>;
+pub type ItemStackResource = WasmResource<Arc<Mutex<pumpkin_data::item_stack::ItemStack>>>;
 
 pub type OwnedConsumedArgs = HashMap<String, OwnedArg>;
 
@@ -220,6 +221,14 @@ impl PluginHostState {
         let resource = self.resource_table.push(CommandNodeResource { provider })?;
         Ok(wasmtime::component::Resource::new_own(resource.rep()))
     }
+
+    pub fn add_item_stack<T>(
+        &mut self,
+        provider: Arc<Mutex<pumpkin_data::item_stack::ItemStack>>,
+    ) -> wasmtime::Result<wasmtime::component::Resource<T>> {
+        let resource = self.resource_table.push(ItemStackResource { provider })?;
+        Ok(wasmtime::component::Resource::new_own(resource.rep()))
+    }
 }
 
 pub struct PluginHttpHooks {

pumpkin/src/plugin/loader/wasm/wasm_host/wit/v0_1/events/player.rs

@@ -10,7 +10,6 @@ use crate::plugin::{
                 to_wasm_click_type, to_wasm_entity_interaction_action, to_wasm_entity_type,
                 to_wasm_game_mode, to_wasm_hand, to_wasm_position,
             },
-            player::to_wit_item_stack,
             pumpkin::plugin::event::{
                 BedrockFormResponseEventData, CustomClickActionEventData, Event,
                 InteractAction as WasmInteractAction, InventoryClickEventData,
@@ -105,6 +104,9 @@ impl ToFromWasmEvent for InventoryCloseEvent {
     }
 }
 
+use std::sync::Arc;
+use tokio::sync::Mutex;
+
 impl ToFromWasmEvent for InventoryClickEvent {
     fn to_wasm_event(&self, state: &mut PluginHostState) -> Event {
         let player = state
@@ -117,8 +119,16 @@ impl ToFromWasmEvent for InventoryClickEvent {
             click_type: to_wasm_click_type(self.click_type),
             slot: self.slot,
             raw_slot: self.raw_slot,
-            clicked_item: self.clicked_item.as_ref().and_then(to_wit_item_stack),
+            clicked_item: self.clicked_item.as_ref().map(|stack| {
-            cursor: self.cursor.as_ref().and_then(to_wit_item_stack),
+                state
+                    .add_item_stack(Arc::new(Mutex::new(stack.clone())))
+                    .expect("failed to add item stack resource")
+            }),
+            cursor: self.cursor.as_ref().map(|stack| {
+                state
+                    .add_item_stack(Arc::new(Mutex::new(stack.clone())))
+                    .expect("failed to add item stack resource")
+            }),
             hotbar_button: self.hotbar_button,
             cancelled: self.cancelled,
         })

pumpkin/src/plugin/loader/wasm/wasm_host/wit/v0_1/gui.rs

@@ -2,13 +2,12 @@ use std::sync::Arc;
 use tokio::sync::Mutex;
 use wasmtime::component::Resource;
 
-use super::player::{from_wit_item_stack, to_wit_item_stack};
 use crate::plugin::api::gui::{PluginGui, PluginInventory};
 use crate::plugin::loader::wasm::wasm_host::{
     state::{GuiResource, PluginHostState},
     wit::v0_1::pumpkin::plugin::{
-        common::ItemStack as WitItemStack,
         gui::{self, Gui, GuiType},
+        item_stack::ItemStack as WitHostItemStack,
     },
 };
 
@@ -85,11 +84,12 @@ impl gui::HostGui for PluginHostState {
         &mut self,
         res: Resource<Gui>,
         slot: u32,
-        item: WitItemStack,
+        item: Resource<WitHostItemStack>,
     ) -> wasmtime::Result<()> {
         let gui = self.get_gui_res(&res)?.provider.lock().await;
         if (slot as usize) < gui.inventory.slots.len() {
-            let item_stack = from_wit_item_stack(item);
+            let item_stack = self.get_item_stack(&item)?;
+            let item_stack = item_stack.lock().await.clone();
             *gui.inventory.slots[slot as usize].lock().await = item_stack;
         }
         Ok(())
@@ -99,11 +99,23 @@ impl gui::HostGui for PluginHostState {
         &mut self,
         res: Resource<Gui>,
         slot: u32,
-    ) -> wasmtime::Result<Option<WitItemStack>> {
+    ) -> wasmtime::Result<Option<Resource<WitHostItemStack>>> {
-        let gui = self.get_gui_res(&res)?.provider.lock().await;
+        let stack = {
-        if (slot as usize) < gui.inventory.slots.len() {
+            let gui = self.get_gui_res(&res)?.provider.lock().await;
-            let stack = gui.inventory.slots[slot as usize].lock().await;
+            if (slot as usize) < gui.inventory.slots.len() {
-            Ok(to_wit_item_stack(&stack))
+                let stack = gui.inventory.slots[slot as usize].lock().await;
+                if stack.is_empty() {
+                    None
+                } else {
+                    Some(stack.clone())
+                }
+            } else {
+                None
+            }
+        };
+
+        if let Some(stack) = stack {
+            Ok(Some(self.add_item_stack(Arc::new(Mutex::new(stack)))?))
         } else {
             Ok(None)
         }

pumpkin/src/plugin/loader/wasm/wasm_host/wit/v0_1/item_stack.rs

@@ -0,0 +1,352 @@
+use crate::plugin::loader::wasm::wasm_host::state::{ItemStackResource, PluginHostState};
+use crate::plugin::loader::wasm::wasm_host::wit::v0_1::pumpkin::plugin::data_components::DataComponent as WitDataComponent;
+use crate::plugin::loader::wasm::wasm_host::wit::v0_1::pumpkin::plugin::enchantments::Enchantment as WitEnchantment;
+use crate::plugin::loader::wasm::wasm_host::wit::v0_1::pumpkin::plugin::item_stack::{
+    DataComponentValue as WitDataComponentValue, EnchantmentValue as WitEnchantmentValue,
+    Host as ItemStackInterfaceHost, HostItemStack, ItemStack as ItemStackHandle,
+};
+use crate::plugin::loader::wasm::wasm_host::wit::v0_1::pumpkin::plugin::text::TextComponent as WitTextComponent;
+use std::sync::Arc;
+use tokio::sync::Mutex;
+use wasmtime::component::Resource;
+
+use crate::plugin::loader::wasm::wasm_host::wit::v0_1::player::{
+    WitSeqAccess, text_component_from_resource,
+};
+use pumpkin_data::Enchantment;
+use pumpkin_data::data_component::DataComponent;
+use pumpkin_data::data_component_impl::{CustomNameImpl, EnchantmentsImpl};
+use pumpkin_protocol::codec::data_component::{deserialize, serialize};
+use pumpkin_protocol::ser::deserializer::Deserializer;
+use pumpkin_protocol::ser::serializer::Serializer;
+use serde::ser::SerializeStruct;
+use serde::ser::Serializer as _;
+use std::borrow::Cow;
+
+pub(crate) fn to_wit_data_component(id: DataComponent) -> WitDataComponent {
+    // Safety: WIT enum is generated in the same order as the internal enum
+    unsafe { std::mem::transmute(id as u8) }
+}
+
+pub(crate) fn from_wit_data_component(id: WitDataComponent) -> DataComponent {
+    // Safety: WIT enum is generated in the same order as the internal enum
+    unsafe { std::mem::transmute(id as u8) }
+}
+
+pub(crate) fn to_wit_enchantment(id: &Enchantment) -> WitEnchantment {
+    // Safety: WIT enum is generated in the same order as the internal enum
+    unsafe { std::mem::transmute(id.id) }
+}
+
+pub(crate) fn from_wit_enchantment(id: WitEnchantment) -> &'static Enchantment {
+    // Safety: WIT enum is generated in the same order as the internal enum
+    Enchantment::from_id(id as u8).unwrap()
+}
+
+impl PluginHostState {
+    pub fn get_item_stack(
+        &self,
+        res: &Resource<ItemStackHandle>,
+    ) -> wasmtime::Result<Arc<Mutex<pumpkin_data::item_stack::ItemStack>>> {
+        self.resource_table
+            .get::<ItemStackResource>(&Resource::new_own(res.rep()))
+            .map(|r| r.provider.clone())
+            .map_err(wasmtime::Error::from)
+    }
+}
+
+impl ItemStackInterfaceHost for PluginHostState {}
+
+impl HostItemStack for PluginHostState {
+    async fn new(
+        &mut self,
+        registry_key: String,
+        count: u8,
+    ) -> wasmtime::Result<Resource<ItemStackHandle>> {
+        let item = pumpkin_data::item::Item::from_registry_key(
+            registry_key
+                .strip_prefix("minecraft:")
+                .unwrap_or(&registry_key),
+        )
+        .unwrap_or(&pumpkin_data::item::Item::AIR);
+        let stack = pumpkin_data::item_stack::ItemStack::new(count, item);
+        self.add_item_stack(Arc::new(Mutex::new(stack)))
+    }
+
+    async fn get_registry_key(
+        &mut self,
+        res: Resource<ItemStackHandle>,
+    ) -> wasmtime::Result<String> {
+        let stack = self.get_item_stack(&res)?;
+        let stack = stack.lock().await;
+        Ok(stack.item.registry_key.to_string())
+    }
+
+    async fn get_count(&mut self, res: Resource<ItemStackHandle>) -> wasmtime::Result<u8> {
+        let stack = self.get_item_stack(&res)?;
+        let stack = stack.lock().await;
+        Ok(stack.item_count)
+    }
+
+    async fn set_count(
+        &mut self,
+        res: Resource<ItemStackHandle>,
+        count: u8,
+    ) -> wasmtime::Result<()> {
+        let stack = self.get_item_stack(&res)?;
+        let mut stack = stack.lock().await;
+        stack.item_count = count;
+        Ok(())
+    }
+
+    async fn get_max_count(&mut self, res: Resource<ItemStackHandle>) -> wasmtime::Result<u8> {
+        let stack = self.get_item_stack(&res)?;
+        let stack = stack.lock().await;
+        // Search in components for MaxStackSize
+        if let Some((_, data)) = stack
+            .item
+            .components
+            .iter()
+            .find(|(id, _)| *id == DataComponent::MaxStackSize)
+            && let Some(max_size) = data
+                .as_any()
+                .downcast_ref::<pumpkin_data::data_component_impl::MaxStackSizeImpl>()
+        {
+            return Ok(max_size.size);
+        }
+        Ok(64) // Default
+    }
+
+    async fn get_enchantments(
+        &mut self,
+        res: Resource<ItemStackHandle>,
+    ) -> wasmtime::Result<Vec<WitEnchantmentValue>> {
+        let stack = self.get_item_stack(&res)?;
+        let stack = stack.lock().await;
+        let mut enchantments = Vec::new();
+        if let Some((_, Some(data))) = stack
+            .patch
+            .iter()
+            .find(|(id, _)| *id == DataComponent::Enchantments)
+            && let Some(enc_impl) = data.as_any().downcast_ref::<EnchantmentsImpl>()
+        {
+            for (enc, level) in enc_impl.enchantment.iter() {
+                enchantments.push(WitEnchantmentValue {
+                    enchantment: to_wit_enchantment(enc),
+                    level: *level as u32,
+                });
+            }
+        }
+        Ok(enchantments)
+    }
+
+    async fn add_enchantment(
+        &mut self,
+        res: Resource<ItemStackHandle>,
+        enchantment: WitEnchantment,
+        level: u32,
+    ) -> wasmtime::Result<()> {
+        let stack = self.get_item_stack(&res)?;
+        let mut stack = stack.lock().await;
+        let enc = from_wit_enchantment(enchantment);
+
+        let mut current_encs = if let Some((_, Some(data))) = stack
+            .patch
+            .iter()
+            .find(|(id, _)| *id == DataComponent::Enchantments)
+        {
+            data.as_any()
+                .downcast_ref::<EnchantmentsImpl>()
+                .map(|e| e.enchantment.clone().into_owned())
+                .unwrap_or_default()
+        } else {
+            Vec::new()
+        };
+
+        current_encs.retain(|(e, _)| e.id != enc.id);
+        current_encs.push((enc, level as i32));
+
+        if let Some((_, data)) = stack
+            .patch
+            .iter_mut()
+            .find(|(id, _)| *id == DataComponent::Enchantments)
+        {
+            *data = Some(Box::new(EnchantmentsImpl {
+                enchantment: Cow::from(current_encs),
+            }));
+        } else {
+            stack.patch.push((
+                DataComponent::Enchantments,
+                Some(Box::new(EnchantmentsImpl {
+                    enchantment: Cow::from(current_encs),
+                })),
+            ));
+        }
+        Ok(())
+    }
+
+    async fn remove_enchantment(
+        &mut self,
+        res: Resource<ItemStackHandle>,
+        enchantment: WitEnchantment,
+    ) -> wasmtime::Result<()> {
+        let stack = self.get_item_stack(&res)?;
+        let mut stack = stack.lock().await;
+        let enc = from_wit_enchantment(enchantment);
+
+        if let Some((_, Some(data))) = stack
+            .patch
+            .iter_mut()
+            .find(|(id, _)| *id == DataComponent::Enchantments)
+            && let Some(enc_impl) = data.as_mut_any().downcast_mut::<EnchantmentsImpl>()
+        {
+            let mut encs = enc_impl.enchantment.clone().into_owned();
+            encs.retain(|(e, _)| e.id != enc.id);
+            enc_impl.enchantment = Cow::from(encs);
+        }
+        Ok(())
+    }
+
+    async fn get_lore(
+        &mut self,
+        res: Resource<ItemStackHandle>,
+    ) -> wasmtime::Result<Vec<Resource<WitTextComponent>>> {
+        let _stack = self.get_item_stack(&res)?;
+        // LoreImpl is currently not fully implemented with data.
+        Ok(Vec::new())
+    }
+
+    async fn set_lore(
+        &mut self,
+        res: Resource<ItemStackHandle>,
+        _lore: Vec<Resource<WitTextComponent>>,
+    ) -> wasmtime::Result<()> {
+        let _stack = self.get_item_stack(&res)?;
+        Ok(())
+    }
+
+    async fn add_lore(
+        &mut self,
+        res: Resource<ItemStackHandle>,
+        _line: Resource<WitTextComponent>,
+    ) -> wasmtime::Result<()> {
+        let _stack = self.get_item_stack(&res)?;
+        Ok(())
+    }
+
+    async fn get_custom_name(
+        &mut self,
+        res: Resource<ItemStackHandle>,
+    ) -> wasmtime::Result<Option<Resource<WitTextComponent>>> {
+        let stack = self.get_item_stack(&res)?;
+        let stack = stack.lock().await;
+        if let Some((_, Some(data))) = stack
+            .patch
+            .iter()
+            .find(|(id, _)| *id == DataComponent::CustomName)
+            && let Some(name_impl) = data.as_any().downcast_ref::<CustomNameImpl>()
+        {
+            let text = pumpkin_util::text::TextComponent::text(name_impl.name.clone());
+            return Ok(Some(self.add_text_component(text)?));
+        }
+        Ok(None)
+    }
+
+    async fn set_custom_name(
+        &mut self,
+        res: Resource<ItemStackHandle>,
+        name: Option<Resource<WitTextComponent>>,
+    ) -> wasmtime::Result<()> {
+        let stack = self.get_item_stack(&res)?;
+        let mut stack = stack.lock().await;
+        if let Some(name_res) = name {
+            let text = text_component_from_resource(self, &name_res);
+            // This is a hack to get some string representation.
+            let name_str = format!("{:?}", text.0.content);
+            if let Some((_, data)) = stack
+                .patch
+                .iter_mut()
+                .find(|(id, _)| *id == DataComponent::CustomName)
+            {
+                *data = Some(Box::new(CustomNameImpl { name: name_str }));
+            } else {
+                stack.patch.push((
+                    DataComponent::CustomName,
+                    Some(Box::new(CustomNameImpl { name: name_str })),
+                ));
+            }
+        } else {
+            stack
+                .patch
+                .retain(|(id, _)| *id != DataComponent::CustomName);
+        }
+        Ok(())
+    }
+
+    async fn get_components(
+        &mut self,
+        res: Resource<ItemStackHandle>,
+    ) -> wasmtime::Result<Vec<WitDataComponentValue>> {
+        let stack = self.get_item_stack(&res)?;
+        let stack = stack.lock().await;
+        let mut components = Vec::new();
+        for (id, data) in &stack.patch {
+            if let Some(data) = data {
+                let mut buf = Vec::new();
+                let mut serializer = Serializer::new(&mut buf);
+                let mut struct_ser = serializer.serialize_struct("", 0).unwrap();
+                serialize(*id, data.as_ref(), &mut struct_ser).unwrap();
+                struct_ser.end().unwrap();
+
+                components.push(WitDataComponentValue {
+                    component: to_wit_data_component(*id),
+                    value: buf,
+                });
+            }
+        }
+        Ok(components)
+    }
+
+    async fn set_component(
+        &mut self,
+        res: Resource<ItemStackHandle>,
+        component: WitDataComponent,
+        value: Vec<u8>,
+    ) -> wasmtime::Result<()> {
+        let stack = self.get_item_stack(&res)?;
+        let mut stack = stack.lock().await;
+        let id = from_wit_data_component(component);
+        let mut deserializer = Deserializer::new(value.as_slice());
+        let mut seq = WitSeqAccess {
+            deserializer: &mut deserializer,
+        };
+
+        if let Ok(component_impl) = deserialize(id, &mut seq) {
+            if let Some((_, data)) = stack.patch.iter_mut().find(|(pid, _)| *pid == id) {
+                *data = Some(component_impl);
+            } else {
+                stack.patch.push((id, Some(component_impl)));
+            }
+        }
+        Ok(())
+    }
+
+    async fn remove_component(
+        &mut self,
+        res: Resource<ItemStackHandle>,
+        component: WitDataComponent,
+    ) -> wasmtime::Result<()> {
+        let stack = self.get_item_stack(&res)?;
+        let mut stack = stack.lock().await;
+        let id = from_wit_data_component(component);
+        stack.patch.retain(|(pid, _)| *pid != id);
+        Ok(())
+    }
+
+    async fn drop(&mut self, rep: Resource<ItemStackHandle>) -> wasmtime::Result<()> {
+        self.resource_table
+            .delete::<ItemStackResource>(Resource::new_own(rep.rep()))
+            .map_err(wasmtime::Error::from)?;
+        Ok(())
+    }
+}

pumpkin/src/plugin/loader/wasm/wasm_host/wit/v0_1/mod.rs

@@ -17,6 +17,7 @@ pub mod forms;
 pub mod generated_packets;
 pub mod gui;
 pub mod i18n;
+pub mod item_stack;
 pub mod java_dialogs;
 pub mod logging;
 pub mod permission;

pumpkin/src/plugin/loader/wasm/wasm_host/wit/v0_1/player.rs

@@ -47,8 +47,12 @@ use pumpkin_protocol::bedrock::client::set_actor_data::{
 use pumpkin_protocol::codec::var_ulong::VarULong;
 use pumpkin_util::version::{BedrockMinecraftVersion, JavaMinecraftVersion};
 
-struct WitSeqAccess<'a> {
+use pumpkin_protocol::ser::ReadingError;
-    deserializer: &'a mut Deserializer<&'a [u8]>,
+use pumpkin_protocol::ser::deserializer::Deserializer;
+use serde::de::SeqAccess;
+
+pub(crate) struct WitSeqAccess<'a> {
+    pub(crate) deserializer: &'a mut Deserializer<&'a [u8]>,
 }
 
 impl<'de> SeqAccess<'de> for WitSeqAccess<'_> {
@@ -494,132 +498,6 @@ fn world_from_resource(
         .clone()
 }
 
-use crate::plugin::loader::wasm::wasm_host::wit::v0_1::pumpkin::plugin::common::DataComponentValue as WitDataComponentValue;
-use crate::plugin::loader::wasm::wasm_host::wit::v0_1::pumpkin::plugin::common::EnchantmentValue as WitEnchantmentValue;
-use crate::plugin::loader::wasm::wasm_host::wit::v0_1::pumpkin::plugin::data_components::DataComponent as WitDataComponent;
-use crate::plugin::loader::wasm::wasm_host::wit::v0_1::pumpkin::plugin::enchantments::Enchantment as WitEnchantment;
-use pumpkin_data::Enchantment;
-use pumpkin_data::data_component::DataComponent;
-use pumpkin_data::data_component_impl::{DataComponentImpl, EnchantmentsImpl};
-use pumpkin_protocol::codec::data_component::{deserialize, serialize};
-use pumpkin_protocol::ser::ReadingError;
-use pumpkin_protocol::ser::deserializer::Deserializer;
-use pumpkin_protocol::ser::serializer::Serializer;
-use serde::de::SeqAccess;
-use serde::ser::SerializeStruct;
-use serde::ser::Serializer as _;
-use std::borrow::Cow;
-
-pub(super) fn to_wit_data_component(id: DataComponent) -> WitDataComponent {
-    // Safety: WIT enum is generated in the same order as the internal enum
-    unsafe { std::mem::transmute(id as u8) }
-}
-
-pub(super) fn from_wit_data_component(id: WitDataComponent) -> DataComponent {
-    // Safety: WIT enum is generated in the same order as the internal enum
-    unsafe { std::mem::transmute(id as u8) }
-}
-
-pub(super) fn to_wit_enchantment(id: &Enchantment) -> WitEnchantment {
-    // Safety: WIT enum is generated in the same order as the internal enum
-    unsafe { std::mem::transmute(id.id) }
-}
-
-pub(super) fn from_wit_enchantment(id: WitEnchantment) -> &'static Enchantment {
-    // Safety: WIT enum is generated in the same order as the internal enum
-    Enchantment::from_id(id as u8).unwrap()
-}
-
-pub(super) fn to_wit_item_stack(
-    stack: &pumpkin_data::item_stack::ItemStack,
-) -> Option<pumpkin::plugin::common::ItemStack> {
-    if stack.is_empty() {
-        return None;
-    }
-
-    let mut components = Vec::new();
-    let mut enchantments = Vec::new();
-    for (id, data) in &stack.patch {
-        if let Some(data) = data {
-            if *id == DataComponent::Enchantments {
-                if let Some(enc_impl) = data.as_any().downcast_ref::<EnchantmentsImpl>() {
-                    for (enc, level) in enc_impl.enchantment.iter() {
-                        enchantments.push(WitEnchantmentValue {
-                            enchantment: to_wit_enchantment(enc),
-                            level: *level as u32,
-                        });
-                    }
-                }
-                continue;
-            }
-
-            let mut buf = Vec::new();
-            let mut serializer = Serializer::new(&mut buf);
-            let mut struct_ser = serializer.serialize_struct("", 0).unwrap();
-            serialize(*id, data.as_ref(), &mut struct_ser).unwrap();
-            struct_ser.end().unwrap();
-
-            components.push(WitDataComponentValue {
-                component: to_wit_data_component(*id),
-                value: buf,
-            });
-        }
-    }
-
-    Some(pumpkin::plugin::common::ItemStack {
-        registry_key: stack.item.registry_key.to_string(),
-        count: stack.item_count,
-        components,
-        enchantments,
-    })
-}
-
-pub(super) fn from_wit_item_stack(
-    stack: pumpkin::plugin::common::ItemStack,
-) -> pumpkin_data::item_stack::ItemStack {
-    let mut patch: Vec<(DataComponent, Option<Box<dyn DataComponentImpl>>)> = Vec::new();
-    for component_value in stack.components {
-        let id = from_wit_data_component(component_value.component);
-        let mut deserializer = Deserializer::new(component_value.value.as_slice());
-
-        let mut seq = WitSeqAccess {
-            deserializer: &mut deserializer,
-        };
-
-        if let Ok(component_impl) = deserialize(id, &mut seq) {
-            patch.push((id, Some(component_impl)));
-        }
-    }
-
-    if !stack.enchantments.is_empty() {
-        let mut encs = Vec::new();
-        for enc_val in stack.enchantments {
-            encs.push((
-                from_wit_enchantment(enc_val.enchantment),
-                enc_val.level as i32,
-            ));
-        }
-        patch.push((
-            DataComponent::Enchantments,
-            Some(Box::new(EnchantmentsImpl {
-                enchantment: Cow::from(encs),
-            })),
-        ));
-    }
-
-    pumpkin_data::item_stack::ItemStack::new_with_component(
-        stack.count,
-        pumpkin_data::item::Item::from_registry_key(
-            stack
-                .registry_key
-                .strip_prefix("minecraft:")
-                .unwrap_or(&stack.registry_key),
-        )
-        .unwrap_or(&pumpkin_data::item::Item::AIR),
-        patch,
-    )
-}
-
 const fn to_wit_permission_level(
     level: PermissionLvl,
 ) -> pumpkin::plugin::permission::PermissionLevel {
@@ -705,18 +583,21 @@ use pumpkin_protocol::codec::item_stack_seralizer::ItemStackSerializer;
 use pumpkin_protocol::java::client::play::CSetContainerSlot;
 use pumpkin_world::inventory::Inventory;
 
+use crate::plugin::loader::wasm::wasm_host::wit::v0_1::pumpkin::plugin::item_stack::ItemStack as WitHostItemStack;
+
 impl pumpkin::plugin::player::HostPlayer for PluginHostState {
     async fn set_item_in_hand(
         &mut self,
         player: Resource<Player>,
         hand: pumpkin::plugin::common::Hand,
-        stack: Option<pumpkin::plugin::common::ItemStack>,
+        stack: Option<Resource<WitHostItemStack>>,
     ) -> wasmtime::Result<()> {
         let player = player_from_resource(self, &player)?;
-        let stack = stack.map_or_else(
+        let stack = if let Some(stack_res) = stack {
-            || pumpkin_data::item_stack::ItemStack::EMPTY.clone(),
+            self.get_item_stack(&stack_res)?.lock().await.clone()
-            from_wit_item_stack,
+        } else {
-        );
+            pumpkin_data::item_stack::ItemStack::EMPTY.clone()
+        };
 
         let hand = from_wasm_hand(hand);
         let slot = match hand {
@@ -738,13 +619,14 @@ impl pumpkin::plugin::player::HostPlayer for PluginHostState {
         &mut self,
         player: Resource<Player>,
         slot: u8,
-        stack: Option<pumpkin::plugin::common::ItemStack>,
+        stack: Option<Resource<WitHostItemStack>>,
     ) -> wasmtime::Result<()> {
         let player = player_from_resource(self, &player)?;
-        let stack = stack.map_or_else(
+        let stack = if let Some(stack_res) = stack {
-            || pumpkin_data::item_stack::ItemStack::EMPTY.clone(),
+            self.get_item_stack(&stack_res)?.lock().await.clone()
-            from_wit_item_stack,
+        } else {
-        );
+            pumpkin_data::item_stack::ItemStack::EMPTY.clone()
+        };
 
         player
             .inventory()
@@ -759,6 +641,35 @@ impl pumpkin::plugin::player::HostPlayer for PluginHostState {
         Ok(())
     }
 
+    async fn get_inventory_item(
+        &mut self,
+        player: Resource<Player>,
+        slot: u8,
+    ) -> wasmtime::Result<Option<Resource<WitHostItemStack>>> {
+        let player = player_from_resource(self, &player)?;
+        let stack = player.inventory().get_stack(slot as usize).await;
+        if stack.lock().await.is_empty() {
+            Ok(None)
+        } else {
+            Ok(Some(self.add_item_stack(stack)?))
+        }
+    }
+
+    async fn get_item_in_hand(
+        &mut self,
+        player: Resource<Player>,
+        hand: pumpkin::plugin::common::Hand,
+    ) -> wasmtime::Result<Option<Resource<WitHostItemStack>>> {
+        let player = player_from_resource(self, &player)?;
+        let hand = from_wasm_hand(hand);
+        let stack = player.inventory().get_stack_in_hand(hand).await;
+        if stack.lock().await.is_empty() {
+            Ok(None)
+        } else {
+            Ok(Some(self.add_item_stack(stack)?))
+        }
+    }
+
     async fn as_entity(
         &mut self,
         player: Resource<Player>,
@@ -1188,35 +1099,6 @@ impl pumpkin::plugin::player::HostPlayer for PluginHostState {
         Ok(player.inventory.get_selected_slot())
     }
 
-    async fn get_item_in_hand(
-        &mut self,
-        player: Resource<Player>,
-        hand: pumpkin::plugin::common::Hand,
-    ) -> wasmtime::Result<Option<pumpkin::plugin::common::ItemStack>> {
-        let player = player_from_resource(self, &player)?;
-        let inventory = player.inventory();
-        let item_stack = match hand {
-            pumpkin::plugin::common::Hand::Left => inventory.off_hand_item().await,
-            pumpkin::plugin::common::Hand::Right => inventory.held_item(),
-        };
-        let item_stack = item_stack.lock().await.clone();
-        Ok(to_wit_item_stack(&item_stack))
-    }
-
-    async fn get_inventory_item(
-        &mut self,
-        player: Resource<Player>,
-        slot: u8,
-    ) -> wasmtime::Result<Option<pumpkin::plugin::common::ItemStack>> {
-        let player = player_from_resource(self, &player)?;
-        let slot = slot as usize;
-        if slot >= PlayerInventory::MAIN_SIZE {
-            return Ok(None);
-        }
-        let item_stack = player.inventory.main_inventory[slot].lock().await.clone();
-        Ok(to_wit_item_stack(&item_stack))
-    }
-
     async fn get_health(&mut self, player: Resource<Player>) -> wasmtime::Result<f32> {
         let player = player_from_resource(self, &player)?;
         Ok(player.living_entity.health.load())

pumpkin/src/plugin/loader/wasm/wasm_host/wit/v0_1/world.rs

@@ -354,6 +354,55 @@ impl pumpkin::plugin::world::HostWorld for PluginHostState {
         Ok(self.get_world_res(&world)?.provider.min_y)
     }
 
+    async fn get_sky_light(
+        &mut self,
+        world: Resource<World>,
+        pos: WitBlockPos,
+    ) -> wasmtime::Result<u8> {
+        let world_ref = self.get_world_res(&world)?;
+        let internal_pos = BlockPos::new(pos.x, pos.y, pos.z);
+        Ok(world_ref.provider.get_sky_light_level(&internal_pos))
+    }
+
+    async fn set_sky_light(
+        &mut self,
+        world: Resource<World>,
+        pos: WitBlockPos,
+        level: u8,
+    ) -> wasmtime::Result<()> {
+        let world_ref = self.get_world_res(&world)?;
+        let internal_pos = BlockPos::new(pos.x, pos.y, pos.z);
+        world_ref.provider.set_sky_light_level(&internal_pos, level);
+        Ok(())
+    }
+
+    async fn get_block_light(
+        &mut self,
+        world: Resource<World>,
+        pos: WitBlockPos,
+    ) -> wasmtime::Result<u8> {
+        let world_ref = self.get_world_res(&world)?;
+        let internal_pos = BlockPos::new(pos.x, pos.y, pos.z);
+        Ok(world_ref
+            .provider
+            .get_block_light_level(&internal_pos)
+            .unwrap_or(0))
+    }
+
+    async fn set_block_light(
+        &mut self,
+        world: Resource<World>,
+        pos: WitBlockPos,
+        level: u8,
+    ) -> wasmtime::Result<()> {
+        let world_ref = self.get_world_res(&world)?;
+        let internal_pos = BlockPos::new(pos.x, pos.y, pos.z);
+        world_ref
+            .provider
+            .set_block_light_level(&internal_pos, level);
+        Ok(())
+    }
+
     async fn get_entities(
         &mut self,
         world: Resource<World>,

pumpkin/src/world/mod.rs

@@ -3428,6 +3428,20 @@ impl World {
             .get_sky_light_level(&self.level, position)
     }
 
+    pub fn set_block_light_level(&self, position: &BlockPos, light_level: u8) {
+        let _ = self
+            .level
+            .light_engine
+            .set_block_light_level(&self.level, position, light_level);
+    }
+
+    pub fn set_sky_light_level(&self, position: &BlockPos, light_level: u8) {
+        let _ = self
+            .level
+            .light_engine
+            .set_sky_light_level(&self.level, position, light_level);
+    }
+
     pub fn schedule_block_tick(
         &self,
         block: &Block,