local storage service refactored according to ssr

npm/ng-packs/packages/core/src/lib/services/local-storage.service.ts

@@ -1,28 +1,45 @@
-import { Injectable } from '@angular/core';
+import { Inject, Injectable, PLATFORM_ID } from '@angular/core';
+import { isPlatformBrowser } from '@angular/common';
 
 @Injectable({
   providedIn: 'root',
 })
 export class AbpLocalStorageService implements Storage {
-  constructor() {}
+  private isBrowser: boolean;
+
+  constructor(@Inject(PLATFORM_ID) private platformId: unknown) {
+    this.isBrowser = isPlatformBrowser(this.platformId);
+  }
   [name: string]: any;
   get length(): number {
-    return localStorage.length;
+    return this.isBrowser ? localStorage.length : 0;
   }
 
   clear(): void {
-    localStorage.clear();
+    if (this.isBrowser) {
+      localStorage.clear();
+    }
   }
-  getItem(key: string): string {
+  getItem(key: string): string | null {
+    if (!this.isBrowser) {
+      return null;
+    }
     return localStorage.getItem(key);
   }
-  key(index: number): string {
+  key(index: number): string | null {
+    if (!this.isBrowser) {
+      return null;
+    }
     return localStorage.key(index);
   }
   removeItem(key: string): void {
-    localStorage.removeItem(key);
+    if (this.isBrowser) {
+      localStorage.removeItem(key);
+    }
   }
   setItem(key: string, value: string): void {
-    localStorage.setItem(key, value);
+    if (this.isBrowser) {
+      localStorage.setItem(key, value);
+    }
   }
 }