PetkevichPavel

fun Context.setDefaultRCFromFile() : Boolean =
    File(filesDir, LOCAL_RC_JSON).takeIf { it.exists() }?.let {file->
        val defaultRC = mutableMapOf<String, Any>()
        gson.fromJson(file.inputStream().convertLocalJsonToString(), RCModel::class.java)?.let { rcModel ->
            defaultRC[RemoteConfigConstants.RC_JSON_PARAM_NAME] = file.inputStream().convertLocalJsonToString()
            remoteConfigManager.updateRc(rcModel)
            remoteConfigManager.updateFetchState(true, currentDateTimestamp)
        }
        app?.firebaseRemoteConfig?.setDefaults(defaultRC)
        file.inputStream().close()

PetkevichPavel

fetchAndActivate().addOnCompleteListener { task ->
    task.isSuccessful.takeIf { it }?.apply {
      context.saveFile(getString(RemoteConfigConstants.RC_JSON_PARAM_NAME).toByteArray(),
      LOCAL_RC_JSON)
    }
}

PetkevichPavel

/**
 * Context extension function which will save the file into the device local storage.
 * @param data - content of the file.
 * @param fileName - name of the final file.
 */
fun Context.saveFile(data: ByteArray, fileName: String) =
        openFileOutput(fileName, Context.MODE_PRIVATE)?.apply {
            write(data)
            close()
        }

PetkevichPavel

class RemoteConfigFunctions(private val gson: Gson, private val context: Context,
                            private val app: App?,
                            private val remoteConfigManager: RemoteConfigManager) {

    companion object {
        private const val TAG = "RemoteConfigFunctions:"
        private const val RECEIVER_TAG = "FCM Receiver:"
    }

/**

PetkevichPavel

class RemoteConfigConstants {
    companion object {
        const val DEFAULT_LOCAL_RC_JSON = "RemoteConfig.json"
        const val LOCAL_RC_JSON = "DeviceRemoteConfig.json"
        const val RC_JSON_PARAM_NAME = "config_json"
        const val RC_EXTRA_BACK_NOTIFICATION = "rc_extra_back_notification"
    }
}

PetkevichPavel

override fun handleRcUpdate(isItServiceUpdate: Boolean, 
                            isFeatureOnBoardingVisible: Boolean) {
    super.handleRcUpdate(isItServiceUpdate, isFeatureOnBoardingVisible)
    when {
        isItServiceUpdate -> updateUrls()
        isFeatureOnBoardingVisible -> 
            navigateToOnBoardingMenu(true)
    }
}

PetkevichPavel

abstract class BaseActivity : AppCompatActivity() {

    companion object {
        private const val TAG = "BaseActivity:"
        private const val RECEIVER_TAG = "BaseActivity-Receiver:"
    }

    private val localBroadcastManager: LocalBroadcastManager by lazy {
        LocalBroadcastManager.getInstance(this)
    }

PetkevichPavel

class FCMService : FirebaseMessagingService() {
    companion object {
        private const val TAG = "FCMService"
        private const val RECEIVER_TAG = "Receiver:"

        const val IN_AP_EX_STR_TITLE = "in_ap_ex_str_title"
        const val IN_AP_EX_STR_BODY = "in_ap_ex_str_body"
    }

    @SuppressLint("TimberArgCount")

PetkevichPavel

/**
 * App extension function, which return reference on RemoteConfigFunctions.
 * @return reference on RemoteConfigFunctions.
 */
fun App.getRCF() = RemoteConfigFunctions(gson, this, this, remoteConfigManager)

PetkevichPavel

override fun onCreate() {
    super.onCreate()
    initFirebase()
    this.getRCF().setDefaultRC()
}
private fun initFirebase() {
    FirebaseApp.initializeApp(this)
    firebaseRemoteConfig = FirebaseRemoteConfig.getInstance()
    val configSettings = FirebaseRemoteConfigSettings.Builder()
            .setFetchTimeoutInSeconds(0)