R.swift extension to support in-app switch

StringResource+Localization.swift

//
//  StringResource+Localization.swift
//  Core
//
//  Created by Johnny Gu on 2020/6/22.
//

import Foundation
import Rswift

public extension StringResource {
    static var currentLanguage: String = "en"
    func localized(_ language: String = currentLanguage) -> String {
    guard
      let basePath = bundle.path(forResource: "en", ofType: "lproj"),
      let baseBundle = Bundle(path: basePath)
    else {
      return self.key
    }

    let fallback = baseBundle.localizedString(forKey: key, value: key, table: tableName)

    guard
      let localizedPath = bundle.path(forResource: language, ofType: "lproj"),
      let localizedBundle = Bundle(path: localizedPath)
    else {
      return fallback
    }

    return localizedBundle.localizedString(forKey: key, value: fallback, table: tableName)
    }
}

public extension String {
    func withInputs(_ params: CVarArg...) -> String {
        return String(format: self, arguments: params)
    }
}

// Usage: R.string.localizable.alert_ok.localized()