Add otp input at login

src/util/TeePromise.js

@@ -0,0 +1,43 @@
+export default class TeePromise {
+    static STATUS_PENDING = {};
+    static STATUS_RUNNING = {};
+    static STATUS_DONE = {};
+    constructor () {
+        this.status_ = this.constructor.STATUS_PENDING;
+        this.donePromise = new Promise((resolve, reject) => {
+            this.doneResolve = resolve;
+            this.doneReject = reject;
+        });
+    }
+    get status () {
+        return this.status_;
+    }
+    set status (status) {
+        this.status_ = status;
+        if ( status === this.constructor.STATUS_DONE ) {
+            this.doneResolve();
+        }
+    }
+    resolve (value) {
+        this.status_ = this.constructor.STATUS_DONE;
+        this.doneResolve(value);
+    }
+    awaitDone () {
+        return this.donePromise;
+    }
+    then (fn, rfn) {
+        return this.donePromise.then(fn, rfn);
+    }
+
+    reject (err) {
+        this.status_ = this.constructor.STATUS_DONE;
+        this.doneReject(err);
+    }
+    
+    /**
+     * @deprecated use then() instead
+     */
+    onComplete(fn) {
+        return this.then(fn);
+    }
+}