remove stack if quantity = 0

src/lib/rpg/items.ts

@@ -316,7 +316,7 @@ export async function getItemQuantity(user: string, itemID: number): Promise<Ite
   };
 }
 
-export async function giveItem(user: string, item: Item, quantity = 1) {
+export async function giveItem(user: string, item: Item, quantity = 1): Promise<ItemInventory> {
   const storedItem = await db<ItemInventory>('itemInventories')
     .where('user', user)
     .where('item', item.id)
@@ -324,6 +324,18 @@ export async function giveItem(user: string, item: Item, quantity = 1) {
 
   let inv;
   if (storedItem) {
+    if (storedItem.quantity + quantity === 0) {
+      await db<ItemInventory>('itemInventories')
+        .delete()
+        .where('user', user)
+        .where('item', item.id);
+      return {
+        user: user,
+        item: item.id,
+        quantity: 0
+      };
+    }
+
     inv = await db<ItemInventory>('itemInventories')
       .update({
         quantity: db.raw('MIN(quantity + ?, ?)', [quantity, getMaxStack(item)])