private fun fetchAllFacebookAlbums() {
    val subscription = socialPhotosViewModel.getAllFacebookAlbums()
            .subscribeOn(Schedulers.io())
            .observeOn(AndroidSchedulers.mainThread())
            .subscribe(
                    {
                        state = it
                    },
                    {
                        Timber.e(it.message)
                    }
            )

    getCompositeSubscription().add(subscription)
}

private fun fetchFacebookAlbum(albumId: String) {
    val subscription = socialPhotosViewModel.getFacebookAlbumFromId(albumId)
            .subscribeOn(Schedulers.io())
            .observeOn(AndroidSchedulers.mainThread())
            .subscribe(
                    {
                        state = it
                    },
                    {
                        Timber.e(it.message)
                    }
            )

    getCompositeSubscription().add(subscription)
}

private fun fetchInstagramPhotos(count: Int) {
    val subscription = socialPhotosViewModel.getInstagramPhotos(count)
            .subscribeOn(Schedulers.io())
            .observeOn(AndroidSchedulers.mainThread())
            .subscribe(
                    {
                        state = it
                    },
                    {
                        Timber.e(it.message)
                    }
            )

    getCompositeSubscription().add(subscription)
}