New packages org (#2639)

New packages org

demo-shell/src/app/components/theme-picker/theme-storage/theme-storage.ts

@@ -0,0 +1,39 @@
+import { EventEmitter, Injectable } from '@angular/core';
+
+export interface DocsSiteTheme {
+  href: string;
+  name: string;
+  accent: string;
+  primary: string;
+  isDark?: boolean;
+  isDefault?: boolean;
+}
+
+@Injectable()
+export class ThemeStorage {
+  static storageKey = 'docs-theme-storage-current';
+
+  public onThemeUpdate: EventEmitter<DocsSiteTheme> = new EventEmitter<DocsSiteTheme>();
+
+  public storeTheme(theme: DocsSiteTheme) {
+    try {
+      window.localStorage[ThemeStorage.storageKey] = JSON.stringify(theme);
+    } catch (e) { }
+
+    this.onThemeUpdate.emit(theme);
+  }
+
+  public getStoredTheme(): DocsSiteTheme {
+    try {
+      return JSON.parse(window.localStorage[ThemeStorage.storageKey] || null);
+    } catch (e) {
+      return null;
+    }
+  }
+
+  public clearStorage() {
+    try {
+      window.localStorage.removeItem(ThemeStorage.storageKey);
+    } catch (e) { }
+  }
+}