minor converter rates refactoring

src/engine/saveLoad.ts

@@ -1,20 +1,28 @@
 import { defaultGame } from "../prefabs/game";
 import { Game, SerializedGame, SerializedNodeBehaviour } from "../types";
-import { Behaviour, behaviours } from "./functions";
+import { Behaviour, behaviours, Converter } from "./functions";
 
 export function serializeBehaviour(behaviour: Behaviour): SerializedNodeBehaviour {
     switch (behaviour.kind) {
-        case 'converter':
+        case 'converter': {
+            const converter = behaviour as Converter;
             return {
-                id: behaviour.id,
+                id: converter.id,
                 kind: 'converter',
                 inputs: {
-                    pins: behaviour.inputs.pins.map((pin) => ({ ...pin })),
+                    pins: converter.inputs.pins.map((pin) => ({
+                        ...pin,
+                        rate: converter.inputRates[pin.resource] ?? 0,
+                    })),
                 },
                 outputs: {
-                    pins: behaviour.outputs.pins.map((pin) => ({ ...pin })),
+                    pins: converter.outputs.pins.map((pin) => ({
+                        ...pin,
+                        rate: converter.outputRates[pin.resource] ?? 0,
+                    })),
                 },
             };
+        }
         default:
             throw new Error('Unknown behaviour');
     }