RxFirebase

A simple library that provides utilities to use Firebase SDK in a reactive fashion. Currently supports RxJava 1, version for RxJava 2 is coming soon!

Setup

Maven

<dependency>
  <groupId>online.devliving</groupId>
  <artifactId>rxfirebaselib</artifactId>
  <version>LATEST_VERSION</version>
  <type>pom</type>
</dependency>

Gradle

compile 'online.devliving:rxfirebaselib:LATEST_VERSION'

Usage

Turn a Task into an Observable using RxGMSTask utility

public Observable<Void> saveUser(FirebaseUser user){
    return getUserRef()
            .flatMap(userRef -> {
                String username = usernameFromEmail(user.getEmail());
                User dbUser = new User(username, user.getEmail());

                return RxGMSTask.just(userRef.setValue(dbUser));
            });
}

Fetch or Observe the value of a Query or DatabaseReference using the RxQuery utility

public Observable<User> getUser(){
    return getUserRef()
            .flatMap(userRef -> RxQuery.observeSingleValue(userRef, User.class));
}

RxQuery.observeValue(mPostReference, Post.class)
        .subscribeOn(Schedulers.io())
        .observeOn(AndroidSchedulers.mainThread())
        .subscribe(post -> {
            mAuthorView.setText(post.author);
            mTitleView.setText(post.title);
            mBodyView.setText(post.body);
        },
            error -> showToast("Error: " + error.getMessage())
        );

You can observe child events too

RxQuery.observeChild(mDatabaseReference)
        .subscribeOn(Schedulers.io())
        .observeOn(AndroidSchedulers.mainThread())
        .subscribe(event -> handleEvent(event),
                error -> mActivity.showToast("Error: " + error.getMessage()));

License

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

Copyright 2017 Mehedi Hasan Khan