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src/lib/browser/localStorageOperators.ts

@@ -0,0 +1,44 @@
+import { z } from "zod";
+
+interface LocalStorageOperator<T> {
+  get: () => T;
+  set: (value: T) => void;
+}
+
+export function getLocalStorageOperator<T extends z.ZodType>(
+  key: string,
+  schema: T
+): LocalStorageOperator<z.infer<T>> {
+  const get = (): z.infer<T> => {
+    if (typeof window === "undefined") {
+      return [] as unknown as z.infer<T>;
+    }
+
+    try {
+      const item = localStorage.getItem(key);
+      if (item === null) {
+        return [] as unknown as z.infer<T>;
+      }
+
+      const parsed = JSON.parse(item);
+      return schema.parse(parsed);
+    } catch (error) {
+      console.error(`Error reading from localStorage key "${key}":`, error);
+      return [] as unknown as z.infer<T>;
+    }
+  };
+
+  const set = (value: z.infer<T>): void => {
+    if (typeof window === "undefined") {
+      return;
+    }
+
+    try {
+      localStorage.setItem(key, JSON.stringify(value));
+    } catch (error) {
+      console.error(`Error writing to localStorage key "${key}":`, error);
+    }
+  };
+
+  return { get, set };
+}