Move packages/apps back

packages/metamigo-common/helpers/index.ts

@@ -0,0 +1,44 @@
+/**
+ * Used by Flavor to mark a type in a readable way.
+ */
+export interface Flavoring<FlavorT> {
+  _type?: FlavorT;
+}
+/**
+ *
+ * Create a "flavored" version of a type. TypeScript will disallow mixing
+ * flavors, but will allow unflavored values of that type to be passed in where
+ * a flavored version is expected. This is a less restrictive form of branding.
+ *
+ */
+export type Flavor<T, FlavorT> = T & Flavoring<FlavorT>;
+
+export type UUID = Flavor<string, "A UUID">;
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export const deepFreeze = (o: unknown): any => {
+  Object.freeze(o);
+
+  const oIsFunction = typeof o === "function";
+  const hasOwnProp = Object.prototype.hasOwnProperty;
+
+  Object.getOwnPropertyNames(o).forEach((prop) => {
+    if (
+      hasOwnProp.call(o, prop) &&
+      (oIsFunction
+        ? prop !== "caller" && prop !== "callee" && prop !== "arguments"
+        : true) &&
+      // @ts-expect-error
+      o[prop] !== null &&
+      // @ts-expect-error
+      (typeof o[prop] === "object" || typeof o[prop] === "function") &&
+      // @ts-expect-error
+      !Object.isFrozen(o[prop])
+    ) {
+      // @ts-expect-error
+      deepFreeze(o[prop]);
+    }
+  });
+
+  return o;
+};