Publish debugging information

[tinder-cfuller]

Usage Example

func format<T>(_ type: T) -> String {
    let type: String = "\(type)"
    let suffix: String = "FlowImp"
    let name: String = type.hasSuffix(suffix)
        ? String(type.dropLast(suffix.count))
        : type
    return "`\(name)`"
}

DebugInformation
    .publisher()
    .sink {
        switch $0 {
        case let .flowWillStart(_, flowType, _):
            print(format(flowType), "will start")
        case let .flowDidEnd(_, flowType):
            print(format(flowType), "did end")
        case let .flowWillAttachSubFlow(_, flowType, _, subFlowType):
            print(format(flowType), "will attach", format(subFlowType))
        case let .flowDidDetachSubFlow(_, flowType, _, subFlowType):
            print(format(flowType), "did detach", format(subFlowType))
        case let .flowControllerWillAttachFlow(_, _, flowType):
            print("flow controller will attach", format(flowType))
        case let .flowControllerDidDetachFlow(_, _, flowType):
            print("flow controller did detach", format(flowType))
        }
    }
    .store(in: &cancellables)

Output:

`App` will start
`App` will attach `Scene`
flow controller will attach `Scene`
`Scene` will start
`Scene` will attach `Window`
flow controller will attach `Window`
`Window` will start
`Window` will attach `Root`
flow controller will attach `Root`
`Root` will start

[tinder-matthewmourlam]

v nice!