Add branding extensions

Author: Half-Shot

src/lifecycles/BrandingExtensions.ts

@@ -0,0 +1,24 @@
+interface AppTitleBase {
+    brand: string;
+    syncError: boolean;
+}
+
+export interface AppTitleInRoom extends AppTitleBase {
+    brand: string;
+    roomName?: string;
+    roomId: string;
+    unreadNotificationCount: number;
+    notificationsMuted: boolean;
+}
+
+export type AppTitleContext = AppTitleBase|AppTitleInRoom;
+
+export interface ProvideBrandingExtensions {
+    getAppTitle(context: AppTitleContext): string|null;
+}
+
+export abstract class BrandingExtensionsBase implements ProvideBrandingExtensions {
+    public getAppTitle(context: AppTitleContext): string|null {
+        return null;
+    }
+}

src/types/extensions.ts

@@ -13,10 +13,12 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
+import { ProvideBrandingExtensions } from "../lifecycles/BrandingExtensions";
 import { ProvideCryptoSetupExtensions } from "../lifecycles/CryptoSetupExtensions";
 import { ProvideExperimentalExtensions } from "../lifecycles/ExperimentalExtensions";
 
 export type AllExtensions = {
+    branding?: ProvideBrandingExtensions;
     cryptoSetup?: ProvideCryptoSetupExtensions;
     experimental?: ProvideExperimentalExtensions;
 };