return new Promise((resolve, reject) => {
if (!keyExists(key)) return reject();
let ref: Firebase = this.ref.child(key);
ref.update(transformDataToFirebaseArrayValue(data), (error) => {
if (error) reject(error);
else resolve(ref);
});
});
.then((snapshot:FirebaseDataSnapshot) => {
let exists = snapshot.exists();
console.log('users store @ user exists: ', exists);
if (exists) {
console.log('users store @ update user');
let updatableData = this.getUpdatableData(userData);
return ref.update(updatableData);
}
console.log('users store @ create user data');
return ref.set(userData);
});