Decrease Block count when Placed

pumpkin-inventory/src/player.rs

@@ -120,6 +120,16 @@ impl PlayerInventory {
         self.items[self.selected + 36 - 9].as_ref()
     }
 
+    pub fn held_item_mut(&mut self) -> Option<&mut ItemStack> {
+        debug_assert!((0..9).contains(&self.selected));
+        self.items[self.selected + 36 - 9].as_mut()
+    }
+
+    pub fn empty_held_item(&mut self) {
+        debug_assert!((0..9).contains(&self.selected));
+        self.items[self.selected + 36 - 9] = None
+    }
+
     pub fn slots(&self) -> Vec<Option<&ItemStack>> {
         let mut slots = vec![self.crafting_output.as_ref()];
         slots.extend(self.crafting.iter().map(|c| c.as_ref()));

pumpkin/src/client/player_packet.rs

@@ -560,13 +560,23 @@ impl Player {
         }
 
         if let Some(face) = BlockFace::from_i32(use_item_on.face.0) {
-            if let Some(item) = self.inventory.lock().await.held_item() {
+            let mut inventory = self.inventory.lock().await;
+            if let Some(item) = inventory.held_item_mut() {
                 let block = get_block_by_item(item.item_id);
                 // check if item is a block, Because Not every item can be placed :D
                 if let Some(block) = block {
                     let entity = &self.living_entity.entity;
                     let world = &entity.world;
 
+                    // TODO: Config
+                    // Decrease Block count
+                    if self.gamemode.load() != GameMode::Creative {
+                        item.item_count -= 1;
+                        if item.item_count == 0 {
+                            inventory.empty_held_item();
+                        }
+                    }
+
                     world
                         .set_block(
                             WorldPosition(location.0 + face.to_offset()),