allow saving and loading carts

builtins.ts

@@ -9,6 +9,7 @@ import { addToContext, runCode } from "./runcode.ts";
 import { resetRepl } from "./repl.ts";
 import { COLOR } from "./colors.ts";
 import { getSheet, getCodeSheet } from "./sheet.ts";
+import { saveCart, loadCart } from "./cart.ts";
 
 let spritesheet: number | null = null;
 
@@ -58,6 +59,8 @@ const faux = {
 	},
 	log: console.log,
 	JSON: JSON,
+	save: saveCart,
+	load: loadCart,
 };
 
 for (const key in faux) {

cart.ts

@@ -1,10 +1,14 @@
 import fakeCart from "./cart_unpacked.json" assert { type: "json" };
 import { Sheet } from "./sheet.ts";
 
-const cart = fakeCart as Array<Sheet>;
+let cart = fakeCart as Array<Sheet>;
 
-export const loadCart = (_name: string) => {
+export const saveCart = async (fname: string) => {
-	return;
+	await Deno.writeTextFile("./carts/"+fname+".fx", JSON.stringify(getCart()));
+}
+
+export const loadCart = async (fname: string) => {
+	cart = JSON.parse(await Deno.readTextFile("./carts/"+fname+".fx"));
 }
 
 export const getCart = () => {