html/memory storage services

src/services/htmlStorage.service.ts

@@ -0,0 +1,45 @@
+import { StorageService } from 'jslib/abstractions/storage.service';
+import { ConstantsService } from 'jslib/services';
+
+export class HtmlStorageService implements StorageService {
+    private localStorageKeys = new Set(['appId', 'anonymousAppId', 'rememberedEmail',
+        ConstantsService.disableFaviconKey, ConstantsService.lockOptionKey, ConstantsService.localeKey,
+        ConstantsService.lockOptionKey]);
+
+    get<T>(key: string): Promise<T> {
+        let json: string = null;
+        if (this.localStorageKeys.has(key)) {
+            json = window.localStorage.getItem(key);
+        } else {
+            json = window.sessionStorage.getItem(key);
+        }
+        if (json != null) {
+            const obj = JSON.parse(json);
+            return Promise.resolve(obj as T);
+        }
+        return Promise.resolve(null);
+    }
+
+    save(key: string, obj: any): Promise<any> {
+        if (obj == null) {
+            return this.remove(key);
+        }
+
+        const json = JSON.stringify(obj);
+        if (this.localStorageKeys.has(key)) {
+            window.localStorage.setItem(key, json);
+        } else {
+            window.sessionStorage.setItem(key, json);
+        }
+        return Promise.resolve();
+    }
+
+    remove(key: string): Promise<any> {
+        if (this.localStorageKeys.has(key)) {
+            window.localStorage.removeItem(key);
+        } else {
+            window.sessionStorage.removeItem(key);
+        }
+        return Promise.resolve();
+    }
+}