Allows one-liner GoogleApiClient Callbacks logging

DebugConnectionCallbacks.java

import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;

import timber.log.Timber;
import xyz.louiscad.common.Constants;

public enum DebugConnectionCallbacks {
    ;

    @NonNull
    public static GoogleApiClient.ConnectionCallbacks
    logIt(@NonNull final GoogleApiClient.ConnectionCallbacks callbacks) {
        if (!Constants.DEBUG) return callbacks;
        else return new GoogleApiClient.ConnectionCallbacks() {
            @Override
            public void onConnected(@Nullable Bundle connectionHint) {
                Timber.d("onConnected(%s)", connectionHint);
                callbacks.onConnected(connectionHint);
            }

            @Override
            public void onConnectionSuspended(int cause) {
                final String causeStr = cause == CAUSE_SERVICE_DISCONNECTED ?
                        "CAUSE_SERVICE_DISCONNECTED" : "CAUSE_NETWORK_LOST";
                Timber.d("onConnectionSuspended(%s)", causeStr);
                callbacks.onConnectionSuspended(cause);
            }
        };
    }

    @NonNull
    public static GoogleApiClient.OnConnectionFailedListener
    logFails(@NonNull final GoogleApiClient.OnConnectionFailedListener listener) {
        if (!Constants.DEBUG) return listener;
        else return new GoogleApiClient.OnConnectionFailedListener() {
            @Override
            public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
                Timber.d("onConnectionFailed(%s)", connectionResult);
                listener.onConnectionFailed(connectionResult);
            }
        };
    }
}

DebugConstants.java

public interface DebugConstants {
    /**
     * Workaround for the always false BuildConfig.DEBUG value in libraries.
     * Must be manually changed to false when build release apk.<br/>
     * For non library modules, use BuildConfig.DEBUG instead, which value
     * changes following buildType.
     */
    boolean DEBUG = true;
}