Removing string parameters with enum chains

Events.swift

public enum Events {
    case home(category: Category)
    case card(category: Category)
    case briefing(category: Category)
    case setting(category: Category)
    var string: String {
        return ""
    }
    var category: Category {
        switch self {
        case .home(category: let category):
            return category
        case .card(category: let category):
            return category
        case .briefing(category: let category):
            return category
        case .setting(category: let category):
            return category
        }
    }
}

public enum Category {
    case none(action: Action)
    case menu(action: Action)
    case canvas(action: Action)
    var string: String {
        return ""
    }
    var action: Action{
        switch self {
        case .none(action: let action):
            return action
        case .menu(action: let action):
            return action
        case .canvas(action: let action):
            return action
        }
    }
}
public enum Action {
    case breifing(value: Value)
    case setting(value: Value)
    case timer(value: Value)
    var string: String {
        return ""
    }
    var value: Value{
        switch self {
        case .breifing(value: let value):
            return value
        case .setting(value: let value):
            return value
        case .timer(value: let value):
            return value
        }
    }
}

public enum Value {
    case none
    case open
    case close
    var string: String {
        return ""
    }
}

func sendEvent(events: Events) {
    let eventString = events.string
    let categoryString = events.category.string
    let actionString = events.category.action.string
    let valueString = events.category.action.value.string
    EventManager.sendEvent(event: eventString, category: categoryString, action: actionString, value: valueString)
}

func call() {
    sendEvent(events: .briefing(category: .canvas(action: .setting(value: .close))))
}