From 8187dd17ad6baa995439734203162dc72909a83f Mon Sep 17 00:00:00 2001
From: intercepted16 <162676516+intercepted16@users.noreply.github.com>
Date: Sat, 1 Jun 2024 10:56:11 +1000
Subject: [PATCH] feat: Add reset method to persisted store

feat: Add reset method to persisted store
---
 index.ts                       | 14 ++++++++++----
 test/localStorageStore.test.ts | 12 ++++++++++++
 2 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/index.ts b/index.ts
index 426993c..6ccb3be 100644
--- a/index.ts
+++ b/index.ts
@@ -1,7 +1,11 @@
 import { writable as internal, type Writable } from 'svelte/store'
 
 declare type Updater<T> = (value: T) => T;
-declare type StoreDict<T> = { [key: string]: Writable<T> }
+declare type StoreDict<T> = { [key: string]: Persisted<T> }
+
+interface Persisted<T> extends Writable<T> {
+  reset: () => void
+}
 
 /* eslint-disable @typescript-eslint/no-explicit-any */
 interface Stores {
@@ -37,11 +41,11 @@ function getStorage(type: StorageType) {
 }
 
 /** @deprecated `writable()` has been renamed to `persisted()` */
-export function writable<StoreType, SerializerType = StoreType>(key: string, initialValue: StoreType, options?: Options<StoreType, SerializerType>): Writable<StoreType> {
+export function writable<StoreType, SerializerType = StoreType>(key: string, initialValue: StoreType, options?: Options<StoreType, SerializerType>): Persisted<StoreType> {
   console.warn("writable() has been deprecated. Please use persisted() instead.\n\nchange:\n\nimport { writable } from 'svelte-persisted-store'\n\nto:\n\nimport { persisted } from 'svelte-persisted-store'")
   return persisted<StoreType, SerializerType>(key, initialValue, options)
 }
-export function persisted<StoreType, SerializerType = StoreType>(key: string, initialValue: StoreType, options?: Options<StoreType, SerializerType>): Writable<StoreType> {
+export function persisted<StoreType, SerializerType = StoreType>(key: string, initialValue: StoreType, options?: Options<StoreType, SerializerType>): Persisted<StoreType> {
   if (options?.onError) console.warn("onError has been deprecated. Please use onWriteError instead")
 
   const serializer = options?.serializer ?? JSON
@@ -125,9 +129,11 @@ export function persisted<StoreType, SerializerType = StoreType>(key: string, in
           return value
         })
       },
+      reset() {
+        this.set(initialValue)
+      },
       subscribe
     }
   }
-
   return stores[storageType][key]
 }
diff --git a/test/localStorageStore.test.ts b/test/localStorageStore.test.ts
index ec00a38..7fc2b6f 100644
--- a/test/localStorageStore.test.ts
+++ b/test/localStorageStore.test.ts
@@ -86,6 +86,18 @@ describe('persisted()', () => {
     })
   })
 
+  describe('reset', () => {
+    it('resets to initial value', () => {
+      const store = persisted('myKey14', 123);
+      store.set(456);
+      store.reset();
+      const value = get(store);
+
+      expect(value).toEqual(123);
+      expect(localStorage.myKey14).toEqual('123');
+      });
+    });
+
   describe('subscribe()', () => {
     it('publishes updates', () => {
       const store = persisted('myKey7', 123)