feat: add storage sync

* feat: add storage sync
* doc: add storage sync docs

apps/demo/src/app/app.component.html

@@ -1,13 +1,12 @@
 <demo-sidebar-cmp>
-
   <div class="nav">
     <mat-nav-list>
       <a mat-list-item routerLink="/todo">DevTools</a>
       <a mat-list-item routerLink="/flight-search">withRedux</a>
       <a mat-list-item routerLink="/flight-search-data-service-simple">withDataService (Simple)</a>
       <a mat-list-item routerLink="/flight-search-data-service-dynamic">withDataService (Dynamic)</a>
       <a mat-list-item routerLink="/flight-search-redux-connector">Redux Connector</a>
-
+      <a mat-list-item routerLink="/todo-storage-sync">withStorageSync</a>
     </mat-nav-list>
   </div>
 
@@ -20,5 +19,4 @@
       <router-outlet></router-outlet>
     </div>
   </div>
-
 </demo-sidebar-cmp>

apps/demo/src/app/app.routes.ts

@@ -5,16 +5,24 @@ import { FlightSearchSimpleComponent } from './flight-search-data-service-simple
 import { FlightEditSimpleComponent } from './flight-search-data-service-simple/flight-edit-simple.component';
 import { FlightSearchDynamicComponent } from './flight-search-data-service-dynamic/flight-search.component';
 import { FlightEditDynamicComponent } from './flight-search-data-service-dynamic/flight-edit.component';
+import { TodoStorageSyncComponent } from './todo-storage-sync/todo-storage-sync.component';
 import { FlightSearchReducConnectorComponent } from './flight-search-redux-connector/flight-search.component';
 import { provideFlightStore } from './flight-search-redux-connector/+state/redux';
 
 export const appRoutes: Route[] = [
   { path: 'todo', component: TodoComponent },
   { path: 'flight-search', component: FlightSearchComponent },
-  { path: 'flight-search-data-service-simple', component: FlightSearchSimpleComponent },
+  {
+    path: 'flight-search-data-service-simple',
+    component: FlightSearchSimpleComponent,
+  },
   { path: 'flight-edit-simple/:id', component: FlightEditSimpleComponent },
-  { path: 'flight-search-data-service-dynamic', component: FlightSearchDynamicComponent },
+  {
+    path: 'flight-search-data-service-dynamic',
+    component: FlightSearchDynamicComponent,
+  },
   { path: 'flight-edit-dynamic/:id', component: FlightEditDynamicComponent },
+  { path: 'todo-storage-sync', component: TodoStorageSyncComponent },
   {
     path: 'flight-search-redux-connector',
     providers: [provideFlightStore()],

apps/demo/src/app/todo-storage-sync/synced-todo-store.ts

@@ -0,0 +1,37 @@
+import { patchState, signalStore, withMethods } from '@ngrx/signals';
+import {
+  withEntities,
+  setEntity,
+  removeEntity,
+  updateEntity,
+} from '@ngrx/signals/entities';
+import { AddTodo, Todo } from '../todo-store';
+import { withStorageSync } from 'ngrx-toolkit';
+
+export const SyncedTodoStore = signalStore(
+  { providedIn: 'root' },
+  withEntities<Todo>(),
+  withStorageSync({
+    key: 'todos',
+  }),
+  withMethods((store) => {
+    let currentId = 0;
+    return {
+      add(todo: AddTodo) {
+        patchState(store, setEntity({ id: ++currentId, ...todo }));
+      },
+
+      remove(id: number) {
+        patchState(store, removeEntity(id));
+      },
+
+      toggleFinished(id: number): void {
+        const todo = store.entityMap()[id];
+        patchState(
+          store,
+          updateEntity({ id, changes: { finished: !todo.finished } })
+        );
+      },
+    };
+  })
+);

apps/demo/src/app/todo-storage-sync/todo-storage-sync.component.html

@@ -0,0 +1,43 @@
+<mat-table [dataSource]="dataSource" class="mat-elevation-z8">
+  <!-- Checkbox Column -->
+  <ng-container matColumnDef="finished">
+    <mat-header-cell *matHeaderCellDef></mat-header-cell>
+    <mat-cell *matCellDef="let row" class="actions">
+      <mat-checkbox
+        (click)="$event.stopPropagation()"
+        (change)="checkboxLabel(row)"
+        [checked]="row.finished"
+      >
+      </mat-checkbox>
+      <mat-icon (click)="removeTodo(row)">delete</mat-icon>
+    </mat-cell>
+  </ng-container>
+
+  <!-- Name Column -->
+  <ng-container matColumnDef="name">
+    <mat-header-cell *matHeaderCellDef>Name</mat-header-cell>
+    <mat-cell *matCellDef="let element">{{ element.name }}</mat-cell>
+  </ng-container>
+
+  <!-- Description Column -->
+  <ng-container matColumnDef="description">
+    <mat-header-cell *matHeaderCellDef>Description</mat-header-cell>
+    <mat-cell *matCellDef="let element">{{ element.description }}</mat-cell>
+  </ng-container>
+
+  <!-- Deadline Column -->
+  <ng-container matColumnDef="deadline">
+    <mat-header-cell mat-header-cell *matHeaderCellDef
+      >Deadline</mat-header-cell
+    >
+    <mat-cell mat-cell *matCellDef="let element">{{
+      element.deadline
+    }}</mat-cell>
+  </ng-container>
+
+  <mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
+  <mat-row
+    *matRowDef="let row; columns: displayedColumns"
+    (click)="selection.toggle(row)"
+  ></mat-row>
+</mat-table>

apps/demo/src/app/todo-storage-sync/todo-storage-sync.component.ts

@@ -0,0 +1,38 @@
+import { Component, effect, inject } from '@angular/core';
+import { MatCheckboxModule } from '@angular/material/checkbox';
+import { MatIconModule } from '@angular/material/icon';
+import { MatTableDataSource, MatTableModule } from '@angular/material/table';
+import { SyncedTodoStore } from './synced-todo-store';
+import { SelectionModel } from '@angular/cdk/collections';
+import { CategoryStore } from '../category.store';
+import { Todo } from '../todo-store';
+
+@Component({
+  selector: 'demo-todo-storage-sync',
+  standalone: true,
+  imports: [MatCheckboxModule, MatIconModule, MatTableModule],
+  templateUrl: './todo-storage-sync.component.html',
+  styleUrl: './todo-storage-sync.component.scss',
+})
+export class TodoStorageSyncComponent {
+  todoStore = inject(SyncedTodoStore);
+  categoryStore = inject(CategoryStore);
+
+  displayedColumns: string[] = ['finished', 'name', 'description', 'deadline'];
+  dataSource = new MatTableDataSource<Todo>([]);
+  selection = new SelectionModel<Todo>(true, []);
+
+  constructor() {
+    effect(() => {
+      this.dataSource.data = this.todoStore.entities();
+    });
+  }
+
+  checkboxLabel(todo: Todo) {
+    this.todoStore.toggleFinished(todo.id);
+  }
+
+  removeTodo(todo: Todo) {
+    this.todoStore.remove(todo.id);
+  }
+}

apps/demo/src/app/todo-store.ts

@@ -15,7 +15,7 @@ export interface Todo {
   deadline?: Date;
 }
 
-type AddTodo = Omit<Todo, 'id'>;
+export type AddTodo = Omit<Todo, 'id'>;
 
 export const TodoStore = signalStore(
   { providedIn: 'root' },

libs/ngrx-toolkit/README.md

@@ -40,7 +40,7 @@ This extension is very easy to use. Just add it to a `signalStore`. Example:
 export const FlightStore = signalStore(
   { providedIn: 'root' },
   withDevtools('flights'), // <-- add this
-  withState({ flights: [] as Flight[] }),
+  withState({ flights: [] as Flight[] })
   // ...
 );
 ```
@@ -76,18 +76,15 @@ export const FlightStore = signalStore(
       return {
         load$: create(actions.load).pipe(
           switchMap(({ from, to }) =>
-            httpClient.get<Flight[]>(
-              'https://demo.angulararchitects.io/api/flight',
-              {
-                params: new HttpParams().set('from', from).set('to', to),
-              },
-            ),
+            httpClient.get<Flight[]>('https://demo.angulararchitects.io/api/flight', {
+              params: new HttpParams().set('from', from).set('to', to),
+            })
           ),
-          tap((flights) => actions.loaded({ flights })),
+          tap((flights) => actions.loaded({ flights }))
         ),
       };
     },
-  }),
+  })
 );
 ```
 
@@ -103,18 +100,18 @@ export const SimpleFlightBookingStore = signalStore(
   withCallState(),
   withEntities<Flight>(),
   withDataService({
-    dataServiceType: FlightService, 
+    dataServiceType: FlightService,
     filter: { from: 'Paris', to: 'New York' },
   }),
-  withUndoRedo(),
+  withUndoRedo()
 );
 ```
 
-The features ``withCallState`` and ``withUndoRedo`` are optional, but when present, they enrich each other.
+The features `withCallState` and `withUndoRedo` are optional, but when present, they enrich each other.
 
-The Data Service needs to implement the ``DataService`` interface:
+The Data Service needs to implement the `DataService` interface:
 
-```typescript 
+```typescript
 @Injectable({
   providedIn: 'root'
 })
@@ -172,30 +169,30 @@ export class FlightSearchSimpleComponent {
 
 ## DataService with Dynamic Properties
 
-To avoid naming conflicts, the properties set up by ``withDataService`` and the connected features can be configured in a typesafe way:
+To avoid naming conflicts, the properties set up by `withDataService` and the connected features can be configured in a typesafe way:
 
 ```typescript
 export const FlightBookingStore = signalStore(
   { providedIn: 'root' },
   withCallState({
-    collection: 'flight'
+    collection: 'flight',
   }),
-  withEntities({ 
-    entity: type<Flight>(), 
-    collection: 'flight'
+  withEntities({
+    entity: type<Flight>(),
+    collection: 'flight',
   }),
   withDataService({
-    dataServiceType: FlightService, 
+    dataServiceType: FlightService,
     filter: { from: 'Graz', to: 'Hamburg' },
-    collection: 'flight'
+    collection: 'flight',
   }),
   withUndoRedo({
     collections: ['flight'],
-  }),
+  })
 );
 ```
 
-This setup makes them use ``flight`` as part of the used property names. As these implementations respect the Type Script type system, the compiler will make sure these properties are used in a typesafe way:
+This setup makes them use `flight` as part of the used property names. As these implementations respect the Type Script type system, the compiler will make sure these properties are used in a typesafe way:
 
 ```typescript
 @Component(...)
@@ -236,6 +233,44 @@ export class FlightSearchDynamicComponent {
 }
 ```
 
+## Storage Sync `withStorageSync()`
+
+`withStorageSync` adds automatic or manual synchronization with Web Storage (`localstorage`/`sessionstorage`).
+
+> [!WARNING]  
+> As Web Storage only works in browser environments it will fallback to a stub implementation on server environments.
+
+Example:
+
+```ts
+const SyncStore = signalStore(
+  withStorageSync<User>({
+    key: 'synced', // key used when writing to/reading from storage
+    autoSync: false, // read from storage on init and write on state changes - `true` by default
+    select: (state: User) => Partial<User>, // projection to keep specific slices in sync
+    parse: (stateString: string) => State, // custom parsing from storage - `JSON.parse` by default
+    stringify: (state: User) => string, // custom stringification - `JSON.stringify` by default
+    storage: () => sessionstorage, // factory to select storage to sync with
+  })
+);
+```
+
+```ts
+@Component(...)
+public class SyncedStoreComponent {
+  private syncStore = inject(SyncStore);
+
+  updateFromStorage(): void {
+    this.syncStore.readFromStorage(); // reads the stored item from storage and patches the state
+  }
+
+  updateStorage(): void {
+    this.syncStore.writeToStorage(); // writes the current state to storage
+  }
+
+  clearStorage(): void {
+    this.syncStore.clearStorage(); // clears the stored item in storage
+
 ## Redux Connector for the NgRx Signal Store `createReduxState()`
 
 The Redux Connector turns any `signalStore()` into a Gobal State Management Slice following the Redux pattern.

libs/ngrx-toolkit/src/index.ts

@@ -3,7 +3,7 @@ export * from './lib/with-redux';
 
 export * from './lib/with-call-state';
 export * from './lib/with-undo-redo';
-export * from './lib/with-data-service';
-
+export * from './lib/with-data-service'
+export { withStorageSync, SyncConfig } from './lib/with-storage-sync';
 export * from './lib/redux-connector';
-export * from './lib/redux-connector/rxjs-interop';
+export * from './lib/redux-connector/rxjs-interop';