convert appid service to ts

src/services/appId.service.ts

@@ -0,0 +1,31 @@
+import UtilsService from './utils.service';
+
+export default class AppIdService {
+    static getAppId(): Promise<string> {
+        return AppIdService.makeAndGetAppId('appId');
+    }
+
+    static getAnonymousAppId(): Promise<string> {
+        return AppIdService.makeAndGetAppId('anonymousAppId');
+    }
+
+    private static async makeAndGetAppId(key: string) {
+        const existingId = await UtilsService.getObjFromStorage<string>(key);
+        if(existingId != null) {
+            return existingId;
+        }
+
+        const guid = UtilsService.newGuid();
+        await UtilsService.saveObjToStorage(key, guid);
+        return guid;
+    }
+
+    // TODO: remove these in favor of static methods
+    getAppId(): Promise<string> {
+        return AppIdService.getAppId();
+    }
+
+    getAnonymousAppId(): Promise<string> {
+        return AppIdService.getAnonymousAppId();
+    }
+}

src/services/utils.service.ts

@@ -8,6 +8,15 @@ const AnalyticsIds = {
 };
 
 export default class UtilsService {
+     // ref: http://stackoverflow.com/a/2117523/1090359
+    static newGuid(): string {
+        return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, (c) => {
+            const r = Math.random() * 16 | 0;
+            const v = c === 'x' ? r : (r & 0x3 | 0x8);
+            return v.toString(16);
+        });
+    }
+
     static extendObject(...objects: any[]): any {
         for (let i = 1; i < objects.length; i++) {
             for (const key in objects[i]) {