Plugin_Demo.swift

//
public protocol ScannerPlugin {
    var id: String { get }

    var symbol: Barcode.Format { get }
    
    func isApplicable(for code: Barcode) -> Observable<Bool>
    
    func build(withCode code: Barcode, listener: ScannerPluginListener) -> ViewableRouting
}

public protocol ScannerPluginListener: class {
    
}

public class ScannerPluginPoint {
    
    private var plugins: [ScannerPlugin] = []
    private var applicablePlugins: [String: ScannerPlugin] = [:]

    private init() {}
    
    func createApplicableRIBs(code: Barcode, listener: ScannerPluginListener) -> Observable<[String: ViewableRouting]> {
        // loop plugins and build child routers
    }
}

// Plugin
protocol PluginAListener {
    
}

final class PluginAInteractor: PresentableInteractor<PluginAPresentable>, PluginAInteractable, PluginAPresentableListener {

    weak var router: PluginARouting?
    weak var listener: ScannerPluginListener? //PluginAListener
}