Rework of FFI, adding a value identifier, so we can keep knowledge of data even when data moves.

src/static_data/items.rs

@@ -2,7 +2,7 @@ use hashbrown::HashSet;
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};
 
-use crate::StringKey;
+use crate::{StringKey, ValueIdentifiable, ValueIdentifier};
 
 /// An item category defines which bag slot items are stored in.
 #[derive(Debug, Copy, Clone)]
@@ -48,6 +48,8 @@ pub enum BattleItemCategory {
 #[derive(Debug)]
 #[cfg_attr(feature = "wasm", derive(unique_type_id_derive::UniqueTypeId))]
 pub struct Item {
+    /// A unique identifier so we know what value this is.
+    identifier: ValueIdentifier,
     /// The name of the item.
     name: StringKey,
     /// Which bag slot items are stored in.
@@ -70,6 +72,7 @@ impl Item {
         flags: HashSet<StringKey>,
     ) -> Item {
         Item {
+            identifier: Default::default(),
             name: name.clone(),
             category,
             battle_category,
@@ -104,3 +107,9 @@ impl Item {
         self.flags.contains(key)
     }
 }
+
+impl ValueIdentifiable for Item {
+    fn value_identifier(&self) -> ValueIdentifier {
+        self.identifier
+    }
+}